PART 3 EXECUTION
3.01 PREPARATION
A. Cooperate with the Commissioning Authority in development of the Prefunctional Checklists and Functional Test Procedures.
B. Furnish additional information requested by the Commissioning Authority.
C. Prepare a preliminary schedule for HVAC pipe and duct system testing, flushing and cleaning, equipment start-up and testing, adjusting, and balancing start and completion for use by the Commissioning Authority; update the schedule as appropriate.
D. Notify the Commissioning Authority when pipe and duct system testing, flushing, cleaning, startup of each piece of equipment and testing, adjusting, and balancing will occur; when commissioning activities not yet performed or not yet scheduled will delay construction notify ahead of time and be proactive in seeing that the Commissioning Authority has the scheduling information needed to efficiently execute the commissioning process.
E. Put all HVAC equipment and systems into operation and continue operation during each working day of testing, adjusting, and balancing and commissioning, as required.
F. Provide test holes in ducts and plenums where directed to allow air measurements and air balancing; close with an approved plug.
G. Provide temperature and pressure taps in accordance with Contract Documents.
3.02 INSPECTING AND TESTING - GENERAL
A. Submit startup plans, startup reports, and Prefunctional Checklists for each item of equipment or other assembly to be commissioned.
B. Perform the Functional Tests directed by the Commissioning Authority for each item of equipment or other assembly to be commissioned.
C. Provide two-way radios for use during the testing.
D. Valve/Damper Stroke Setup and Check:
1. For all valve/damper actuator positions checked, verify the actual position against the control system readout.
2. Set pump/fan to normal operating mode.
3. Command valve/damper closed; visually verify that valve/damper is closed and adjust output zero signal as required.
4. Command valve/damper open; verify position is full open and adjust output signal as required.
5. Command valve/damper to a few intermediate positions.
6. If actual valve/damper position does not reasonably correspond, replace actuator or add pilot positioner (for pneumatics).
E. Isolation Valve or System Valve Leak Check: For valves not by coils.
1. With full pressure in the system, command valve closed.
2. Use an ultra-sonic flow meter to detect flow or leakage.
F. Deficiencies: Correct deficiencies and re-inspect or re-test, as applicable, at no extra cost to Owner.
3.03 TAB COORDINATION
A. TAB: Testing, adjusting, and balancing of HVAC.
B. Coordinate commissioning schedule with TAB schedule. 286
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C. Review the TAB plan to determine the capabilities of the control system toward completing TAB.
D. Provide all necessary unique instruments and instruct the TAB technicians in their use; such as handheld control system interface for setting terminal unit boxes, etc.
E. Have all required Prefunctional Checklists, calibrations, startup and component Functional Tests of the system completed and approved by the Commissioning Authority prior to starting TAB.
F. Provide a qualified control system technician to operate the controls to assist the TAB technicians or provide sufficient training for the TAB technicians to operate the system without assistance.
3.04 CONTROL SYSTEM FUNCTIONAL TESTING
A. Prefunctional Checklists for control system components will require a signed and dated certification that all system programming is complete as required to accomplish the requirements of Contract Documents and the detailed Sequences of Operation documentation submittal.
B. Do not start Functional Testing until all controlled components have themselves been successfully Functionally Tested in accordance with Contract Documents.
C. Using a skilled technician who is familiar with this building, execute the Functional Testing of the control system as required by the Commissioning Authority.
D. Functional Testing of the control system constitutes demonstration and trend logging of control points monitored by the control system.
1. The scope of trend logging is partially specified; trend log up to 50 percent more points than specified at no extra cost to Owner.
2. Perform all trend logging specified in Prefunctional Checklists and Functional Test procedures.
E. Functionally Test integral or stand-alone controls in conjunction with the Functional Tests of the equipment they are attached to, including any interlocks with other equipment or systems; further testing during control system Functional Test is not required unless specifically indicated below.
F. Demonstrate the following to the Commissioning Authority during testing of controlled equipment; coordinate with commissioning of equipment.
1. Setpoint changing features and functions.
2. Sensor calibrations.
G. Demonstrate to the Commissioning Authority:
1. That all specified functions and features are set up, debugged and fully operable.
2. That scheduling features are fully functional and setup, including holidays.
3. That all graphic screens and value readouts are completed.
4. Correct date and time setting in central computer.
5. That field panels read the same time as the central computer; sample 10 percent of field panels; if any of those fail, sample another 10 percent; if any of those fail test all remaining units at no extra cost to Owner.
6. Functionality of field panels using local operator keypads and local ports (plug-ins) using portable computer/keypad; demonstrate 100 percent of panels and 10 percent of ports; if any ports fail, sample another 10 percent; if any of those fail, test all remaining units at no extra cost to Owner.
7. Power failure and battery backup and power-up restart functions.
8. Global commands features.
9. Security and access codes.
10. Occupant over-rides (manual, telephone, key, keypad, etc.).
11. O&M schedules and alarms.
12. Occupancy sensors and controls.
13. All control strategies and sequences not tested during controlled equipment testing. 287
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H. If the control system, integral control components, or related equipment do not respond to changing conditions and parameters appropriately as expected, as specified and according to acceptable operating practice, under any of the conditions, sequences, or modes tested, correct all systems, equipment, components, and software required at no additional cost to Owner.
3.05 OPERATION AND MAINTENANCE MANUALS
A. See Section 017800 for additional requirements.
B. Add design intent documentation furnished by Architect to manuals prior to submission to Owner.
C. Submit manuals related to items that were commissioned to Commissioning Authority for review; make changes recommended by Commissioning Authority.
D. Commissioning Authority will add commissioning records to manuals after submission to Owner.
3.06 DEMONSTRATION AND TRAINING
A. See Section 017900 for additional requirements.
B. Demonstrate operation and maintenance of HVAC system to Owner' personnel; if during any demonstration, the system fails to perform in accordance with the information included in the O&M manual, stop demonstration, repair or adjust, and repeat demonstration. Demonstrations may be combined with training sessions if appropriate.
C. These demonstrations are in addition to, and not a substitute for, Prefunctional Checklists and demonstrations to the Commissioning Authority during Functional Testing.
D. Provide classroom and hands-on training of Owner's designated personnel on operation and maintenance of the HVAC system, control system, and all equipment items indicated to be commissioned. Provide the following minimum durations of training:
E. TAB Review: Instruct Owner's personnel for minimum 8 hours, after completion of TAB, on the following:
1. Review final TAB report, explaining the layout and meanings of each data type.
2. Discuss any outstanding deficient items in control, ducting or design that may affect the proper delivery of air or water.
3. Identify and discuss any terminal units, duct runs, diffusers, coils, fans and pumps that are close to or are not meeting their design capacity.
4. Discuss any temporary settings and steps to finalize them for any areas that are not finished.
5. Other salient information that may be useful for facility operations, relative to TAB.
F. HVAC Control System Training: Perform training in at least three phases:
1. Phase 1 - Basic Control System: Provide minimum of 8 hours of actual training on the control system itself. Upon completion of training, each attendee, using appropriate documentation, should be able to perform elementary operations and describe general hardware architecture and functionality of the system.
a. This training may be held on-site or at the manufacturer's facility. b. If held off-site, the training may occur prior to final completion of the system installation.
c. For off-site training, Contractor shall pay expenses of up to two attendees.
2. Phase 2 - Integrating with HVAC Systems: Provide minimum of 16 hours of on-site, hands-on training after completion of Functional Testing. Include instruction on:
a. The specific hardware configuration of installed systems in this facility and specific instruction for operating the installed system, including interfaces with other systems, if any.
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b. Security levels, alarms, system start-up, shut-down, power outage and restart routines, changing setpoints and alarms and other typical changed parameters, overrides, freeze protection, manual operation of equipment, optional control strategies that can be considered, energy savings strategies and set points that if changed will adversely affect energy consumption, energy accounting, procedures for obtaining vendor assistance, etc.
c. Trend logging and monitoring features (values, change of state, totalization, etc.), including setting up, executing, downloading, viewing both tabular and graphically and printing trends; provide practice in setting up trend logging and monitoring during training session.
d. Every display screen, allowing time for questions.
e. Point database entry and modifications.
3. Phase 3 - Post-Occupancy: Six months after occupancy conduct minimum of 16 hours of training. Tailor training session to questions and topics solicited beforehand from Owner.
Also be prepared to address topics brought up and answer questions concerning operation of the system.
G. Provide the services of manufacturer representatives to assist instructors where necessary.
H. Provide the services of the HVAC controls instructor at other training sessions, when requested, to discuss the interaction of the controls system as it relates to the equipment being discussed.
END OF SECTION 230800
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HVAC Replacement 230900 - 1 Instrumentation and Control for HVAC SECTION 230900
INSTRUMENTATION AND CONTROL FOR HVAC
PART 1: GENERAL
1.1 Products Furnished but Not Installed Under This Section A. None
1.2 Products Installed but Not Furnished Under This Section A. None
1.3 Products Not Furnished or Installed Under but Integrated with the Work of This Section A. Low-Voltage Controllers
1. Variable frequency drives: The variable frequency drive (VFD) vendor shall furnish VFDs with an interface to the control and monitoring points specified in Section 23 09 34. These specified points shall be the minimum acceptable interface to the VFD. The connection to these points shall be by one of the following methods: (a) Hardwired connection such as relay, 0-10VDC, or 4-20mA. (b) BACnet/IP network connection. (c) BACnet over ARCNET network connection. (d) BACnet MS/TP network connection.
B. Section 23 74 13 – Air Handling units, 23 74 16 Packaged Rooftop AC units, 23 81 29 VRF HVAC
1. AHU, Packaged and VRF HVAC controls: Unit shall be furnished configured to accept control inputs from an external building automation system controller as specified in Section 23 09 00.
Factory mounted safeties and other controls shall not interfere with this controller.
C. Communications with Third Party Equipment:
1. General: The BMS shall be capable of integrating to any third party equipment using any of the following standard open protocols:
a. BACnet (IP, SC, Arcnet, or MS/TP)
b. Modbus (RTU or IP)
2. The third-party equipment provider shall provide the details of the proposed interface including PICS for BACnet equipment, hardware and software identifiers for the interface points, network identifiers, wiring requirements, communication speeds, and required network accessories.
3. The third-party equipment provider is responsible for furnishing and installing their interface preprogrammed and configured with the correct parameters to integrate with the BMS. These parameters include, but are not limited to the following:
a. Communication protocol
b. Correct communication protocol baud rate
c. Points required to be viewed through the BMS. This includes ensuring the points are “in service” and visible to the BMS.
d. Addressing of controller/interface. The BMS provider shall furnish the address.
1.4 Related Sections
A. The General Conditions of the Contract, Supplementary Conditions, and General Requirements are part of this specification and shall be used in conjunction with this section as part of the contract documents.
B. The following sections constitute related work:
1. Section 01 30 00 - Administrative Requirements
2. Section 01 60 00 - Product Requirements
3. Section 01 91 13 – General Commissioning requirements
4. Section 23 08 00 – Commissioning of HVAC
5. Section 23 09 34 – Variable Frequency Motor Controllers (VFD Drives) 290
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6. Section 23 74 13 – Air Handling units
7. Section 23 74 16 – Packaged Rooftop Air conditioning units
8. Section 23 81 29 – Variable Refrigerant Flow HVAC Equipment
1.5 Description
A. General: The control system shall consist of a high-speed, peer-to-peer network of DDC controllers, a control system server, and a web-based operator interface.
B. System software shall be based on a server/thin client architecture, designed around the open standards of web technology. The control system server shall be accessed using a Web browser over the control system network, the owner’s local area network, and (at the owner’s discretion) over the Internet.
C. The intent of the thin-client architecture is to provide operators complete access to the control system via a Web browser. No special software other than a web browser shall be required to access graphics, point displays, and trends, configure trends, configure points and controllers, or to download programming into the controllers.
D. System shall use the BACnet protocol for communication between the control modules and web server. Communication between the web server and the user’s browser shall be HTTP or HTTPS protocol utilizing HTML5. Use of Adobe Flash technology is not acceptable.
1.6 Approved BMS Systems
A. The following are approved control system suppliers, manufacturers, and product lines:
Supplier Manufacturer Product Line
Automated Electric or exclusive I-Vu
Controls expert dealer who’s primary
business is controls only, has minimum project experience record of 10 year and has successfully completed
similar size project and larger.
Carrier i-Vu
The above list does not indicate order of preference. Inclusion on this list does not guarantee acceptance of products or installation. Control systems shall comply with the terms of this specification.
B. The Contractor shall use only operator workstation software, controller software, custom application programming language, and controllers from the corresponding manufacturer and product line unless Owner approves use of multiple manufacturers.
C. Other products specified herein (such as sensors, valves, dampers, and actuators) need not be manufactured by the above manufacturers.
1.7 Quality Assurance
A. Installer and Manufacturer Qualifications
1. Installer shall have an established working relationship with the Control System Manufacturer and have, as a minimum, 5 years demonstrated experience with installation and support of the manufacturer’s product.
2. Installer shall have successfully completed Control System Manufacturer’s control system training. Upon request, Installer shall present record of completed training including course outlines.
1.8 Codes and Standards
A. Work, materials, and equipment shall comply with the most restrictive of local, state, and federal authorities’ codes and ordinances or these plans and specifications. As a minimum, the installation 291
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HVAC Replacement 230900 - 3 Instrumentation and Control for HVAC shall comply with the current editions in effect 30 days prior to the receipt of bids of the following codes:
1.9 System Performance
A. Performance Standards. System shall conform to the following minimum standards over network connections. Systems shall be tested using manufacturer’s recommended hardware and software for display through the user’s web browser.
1. Graphic Display.A graphic with 20 dynamic points shall display with current data within 10 sec.
2. Graphic Refresh.A graphic with 20 dynamic points shall update with current data within 8 sec. and shall automatically refresh every 15 sec.
3. Configuration and Tuning Screens. Screens used for configuring, calibrating, or tuning points, PID loops, and similar control logic shall automatically refresh within 6 sec.
4. Object Command. Devices shall react to command of a binary object within 2 sec. Devices shall begin reacting to command of an analog object within 2 sec.
5. Alarm Response Time. An object that goes into alarm shall be annunciated at the browser within 45 sec.
6. Program Execution Frequency. Custom and standard applications shall be capable of running as often as once every 5 sec.
7. Performance. Programmable controllers shall be able to completely execute DDC PID control loops at a frequency adjustable down to once per sec. Select execution times consistent with the mechanical process under control.
8. Multiple Alarm Annunciation. Each user, connected to network accessing the system through their browser (workstation), shall receive alarms within 5 seconds of one another.
9. Reporting Accuracy. System shall report values with minimum end-to-end accuracy listed in Table 1.
10. Control Stability and Accuracy. Control loops shall maintain measured variable at setpoint within tolerances listed in Table 2.
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HVAC Replacement 230900 - 4 Instrumentation and Control for HVAC Table-1
Reporting Accuracy
Measured Variable Reported Accuracy
Space Temperature ±0.5ºC (±1ºF)
Ducted Air ±0.5ºC (±1ºF)
Outside Air ±1.0ºC (±2ºF)
Dew Point ±1.5ºC (±3ºF)
Water Temperature ±0.5ºC (±1ºF)
Delta-T ±0.15º (±0.25ºF)
Relative Humidity ±5% RH
Water Flow ±2% of full scale
Airflow (terminal) ±10% of full scale (see Note 1)
Airflow (measuring stations) ±5% of full scale
Airflow (pressurized spaces) ±3% of full scale
Air Pressure (ducts) ±25 Pa (±0.1 in. w.g.)
Air Pressure (space) ±3 Pa (±0.01 in. w.g.)
Water Pressure ±2% of full scale (see Note 2)
Electrical (A, V, W, Power Factor) ±1% of reading (see Note 3) Carbon Monoxide (CO) ±5% of reading
Carbon Dioxide (CO2) ±50 ppm
Note 1: Accuracy applies to 10%–100% of scale
Note 2: For both absolute and differential pressure
Note 3: Not including utility-supplied meters
Table 2
Control Stability and Accuracy
Controlled Variable Control Accuracy Range of Medium
Air Pressure ±50 Pa (±0.2 in. w.g.)
±3 Pa (±0.01 in. w.g.)
0–1.5 kPa (0–6 in. w.g.)
-25 to 25 Pa (-0.1 to 0.1 in. w.g.)
Airflow ±10% of full scale
Space Temperature ±1.0ºC (±2.0ºF)
Duct Temperature ±1.0ºC (±2.0ºF)
Humidity ±5% RH
Fluid Pressure ±10 kPa (±1.5 psi)
±250 Pa (±1.0 in. w.g.)
MPa (1–150 psi)
0–12.5 kPa (0–50 in. w.g.) differential
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1.10 Submittals
A. Product Data and Shop Drawings: The contractor shall provide shop drawings and product data on hardware, software, and equipment to be installed or provided. No work may begin on any segment of this project until submittals have been approved for conformity with design intent. Provide 3 copies of printed submittal data. Printed shop drawings shall be on 11” x 17” pages and hardware/software product data can be on 8.5” x 11” pages. Provide submittal data in a digital format on suitable digital media such as a USB drive. The submittal data shall be in standard Microsoft (Word, Excel, etc.) or PDF file formats. When manufacturer's cutsheets apply to a product series rather than a specific product, the data specifically applicable to the project shall be highlighted or clearly indicated by other means. Each submitted piece of literature and drawing shall clearly reference the specification and/or drawing that the submittal is to cover. General catalogs shall not be accepted as cutsheets to fulfill submittal requirements. Select and show submittal quantities appropriate to scope of work. Submittal approval does not relieve Contractor of responsibility to supply sufficient quantities to complete work.
Submittals shall be provided within 12 weeks of contract award. Submittals shall include:
1. DDC System Hardware
a. A complete bill of materials to be used indicating quantity, manufacturer, model number, and relevant technical data of equipment to be used.
b. Manufacturer’s description and technical data such as performance curves, product specifications, and installation and maintenance instructions for items listed below and for relevant items not listed below:
i. Direct digital controllers (controller panels)
ii. Transducers and transmitters
iii. Sensors (including accuracy data)
iv. Actuators
v. Valves
vi. Relays and switches
vii. Control panels
viii. Power supplies
ix. Batteries
x. Operator interface equipment
xi. Wiring
c. Wiring diagrams and layouts for each control panel. Show termination numbers. d. Schematic diagrams for all field sensors and controllers. Provide floor plans of all sensor locations and control hardware. Riser diagrams showing control network layout, communication protocol, and wire types.
2. Central System Hardware and Software
a. A complete bill of material of equipment used indicating quantity, manufacturer, model number, and relevant technical.
b. Manufacturer’s description and technical data such as product specifications and installation and maintenance instructions for items listed below and for relevant items furnished under this contract not listed below:
i. Central Processing Unit (CPU) or web server
ii. Monitors
iii. Keyboards
iv. Power supplies
v. Battery backups
vi. Interface equipment between CPU or server and control panels vii. Operating System software – web server
viii. Color graphic software
ix. Third-party software
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HVAC Replacement 230900 - 6 Instrumentation and Control for HVAC c. Schematic diagrams for all control, communication, and power wiring. Provide a schematic drawing of the central system installation. Label all cables and ports with computer manufacturers’ model numbers and functions. Show interface wiring to control system.
d. Network riser diagrams of wiring between central control unit and control panels.
3. Controlled Systems
a. Riser diagrams showing control network layout, communication protocol, and wire types. b. A schematic diagram of each controlled system. The schematics shall have all control points labeled with point names shown or listed. The schematics shall graphically show the location of all control elements in the system.
c. A schematic wiring diagram of each controlled system. Label control elements and terminals. Where a control element is also shown on control system schematic, use the same name.
d. An instrumentation list (Bill of Materials) for each controlled system. List each control system element in a table. Show element name, type of device, manufacturer, model number, and product data sheet number.
e. A mounting, wiring, and routing plan-view drawing. The design shall take into account HVAC, electrical, and other systems’ design and elevation requirements. The drawing shall show the specific location of all concrete pads and bases and any special wall bracing for panels to accommodate this work.
f. A complete description of the operation of the control system, including sequences of operation. The description shall include and reference a schematic diagram of the controlled system.
g. A point list for each control system. List I/O points and software points required to provide specified sequence of operations. Indicate alarmed and trended points.
4. Quantities of items submitted shall be reviewed but are the responsibility of the Contractor.
5. BACnet Protocol Implementation Conformance Statement (PICS) for each submitted type of controller and operator interface.
B. Project Documentation.
1. Upon completion of installation, submit three printed copies of record (as-built) documents for approval before final completion. In addition, provide a digital copy of record documents on suitable digital media such as a USB drive. The digital record documents shall be in standard Microsoft (Word, Excel, etc.) or PDF file formats except as noted below. Record documentation shall include the following:
a. Project Record Drawings. As-built versions of submittal shop drawings provided as AutoCAD compatible files on suitable solid state media (file format: .DWG, .DXF, .VSD, or comparable) and as 11” x 17” prints.
b. Testing and Commissioning Reports and Checklists.
c. Operation and Maintenance (O&M) Manual.
d. As-built versions of submittal product data.
e. Names, addresses, and telephone numbers of installing contractors and service representatives for equipment and control systems.
f. Operator’s manual with procedures for operating control systems: logging on and off, handling alarms, producing point reports, trending data, overriding computer control, and changing setpoints and variables.
g. Programming manual or set of manuals with description of programming language and syntax, of statements for algorithms and calculations used, of point database creation and modification, of program creation and modification, and of editor use. h. Engineering, installation, and maintenance manual or set of manuals that explains how to design and install new points, panels, and other hardware; how to perform preventive maintenance and calibration; how to debug hardware problems; and how to repair or replace hardware.
i. Documentation of programs operating in the system and object database that can be viewed using technician software tools furnished with system. 295
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HVAC Replacement 230900 - 7 Instrumentation and Control for HVAC j. Graphic files, programs, and database to be viewed using technician software tools furnished with system.
k. List of recommended spare parts with part numbers and suppliers. l. Complete original-issue documentation, installation, and maintenance information for furnished third-party hardware including computer equipment and sensors. m. Complete original-issue copies of furnished software, including operating systems, custom programming language, operator workstation or web server software, and graphics software.
n. Licenses, guarantees, and warranty documents for equipment and systems. o. Recommended preventive maintenance procedures for system components, including schedule of tasks such as inspection, cleaning, and calibration; time between tasks; and task descriptions.
2. Load into the control system for access by the operator through any operator workstation closeout documentation. There shall be a menu or navigation tab to access the documentation.
The documentation can be loaded into the control system in a pdf format. The following documentation shall be included:
a. As-built control diagrams including wiring diagrams and sequences of operations for each controller/piece of equipment.
b. All IOM data as follows:
i. IOM from each equipment manufacturer for each piece of equipment (AHUs, FCUs, Chillers, pumps etc.)
ii. IOM for each control module and end device installed in the system.
C. Training Materials: Provide course outline and materials for each class at least six weeks before first class. Training shall be furnished via instructor-led sessions, computer-based training, or web-based training. Engineer will modify course outlines and materials if necessary to meet Owner’s needs.
Engineer will review and approve course outlines and materials at least three weeks before first class.
1.11 Warranty
A. Warrant work as follows:
1. Warrant labor and materials for specified control system free from defects for a period of 12 months after final acceptance. Control system failures during warranty period shall be adjusted, repaired, or replaced at no additional cost or reduction in service to Owner. Respond during normal business hours within 24 hours of Owner’s warranty service request.
2. Work shall have a single warranty date, even if Owner receives beneficial use due to early system start-up. If specified work is split into multiple contracts or a multi-phase contract, each contract or phase shall have a separate warranty start date and period.
3. If the engineer determines that equipment and systems operate satisfactorily at the end of final start-up, testing, and commissioning phase, the engineer will certify in writing that control system operation has been tested and accepted in accordance with the terms of this specification. Date of acceptance shall begin warranty period.
4. All Manufacturer’s software/firmware for web server/workstation and controllers shall be updated to the latest versions that are available from the manufacturer within 30 days from the date of end of the warranty. These updates shall be installed and checked out before the end of the warranty.
5. Provide updates to web server software, project-specific software, graphic software, database software, and firmware that resolve the contractor-identified software deficiencies at no charge during warranty period. If available, Owner can purchase in-warranty service agreement to receive upgrades for functional enhancements associated with above-mentioned items. Do not install updates or upgrades without Owner’s written authorization.
6. Exception: Contractor shall not be required to warrant reused devices except those that have been rebuilt or repaired and factory recertified. Installation labor and materials shall be warranted. Demonstrate operable condition of reused devices at time of Engineer’s acceptance.
1.12 Ownership of Proprietary Material
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HVAC Replacement 230900 - 8 Instrumentation and Control for HVAC A. Project-specific software and documentation shall become Owner’s property. This includes, but is not limited to:
1. Graphics
2. Record drawings
3. Database
4. Application programming code
5. Documentation
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HVAC Replacement 230900 - 9 Instrumentation and Control for HVAC PART 2: PRODUCTS
2.1 Materials
A. Use new products the manufacturer is currently manufacturing and selling for use in new installations. Do not use this installation as a product test site unless explicitly approved in writing by Owner. Spare parts shall be available for at least five years after completion of this contract.
2.2 Communication
A. Control products, communication media, connectors, repeaters, hubs, and routers shall comprise a BACnet internetwork. Controller and operator interface communication shall conform to ANSI/ASHRAE Standard 135, BACnet.
B. All IP based controllers shall be capable of providing IPv4 and IPv6 protocol standards as defined by the Internet Data Communications Standard.
C. The owner shall furnish and install all communication media, connectors, repeaters and network switches/routers, and network devices necessary to provide a complete and workable high speed Ethernet communications/LAN network meeting or exceeding rec-ommended control network specifications. The owner will provide an active IP/Ethernet port/drop within patch distance to each BMS server and BMS controller for connection to owner's LAN. BMS contractor will furnish and install all communications media, connectors, repeaters, switches/routers, and network devices necessary to provide a complete and workable serial network. Established network requirements such as labeling, testing, administration, and documentation must be provided to controls vendor prior to start of project.
D. Each controller shall have a communication port for temporary connection to a laptop computer or other operator interface. Connection shall support memory downloads and other commissioning and troubleshooting operations.
E. Internetwork operator interface and value passing shall be transparent to internetwork architecture.
1. An operator interface connected to a controller shall allow the operator to interface with each internetwork controller as if directly connected. Controller information such as data, status, and control algorithms shall be viewable and editable from each internetwork controller.
2. Inputs, outputs, and control variables used to integrate control strategies across multiple controllers shall be readable by each controller on the internetwork. Program and test all cross-controller links required to execute specified sequences of operation. An authorized operator shall be able to edit cross-controller links by typing a standard object address or by using a point-and-click interface.
F. Building Control Panels, and Controllers with real-time clocks shall use the BACnet Time Synchronization service. System shall automatically synchronize system clocks daily from an operator-designated device via the internetwork. The system shall automatically adjust for daylight saving and standard time as applicable.
G. System shall be expandable to at least twice the required BACnet objects. No additional licensing/software fees shall be required to add controllers, associated devices, and wiring.
H. System shall support Web services data exchange with any other system that complies with XML (extensible markup language) and SOAP (simple object access protocol) standards. Web services support shall as a minimum be provided at the workstation or web server level and shall enable data to be read from or written to the system.
1. System shall support Web services read data requests by retrieving requested trend data or point values (I/O hardware points, analog value software points, or binary value software points) from any system controller or from the trend history database.
2. System shall support Web services write data request to each analog and binary object that can be edited through the system operator interface by downloading a numeric value to the specified object.
3. For read or write requests, the system shall require user name and password authentication and shall support TLS (Transport Layer Security) or equivalent data encryption. 298
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4. System shall support discovery through a Web services connection or shall provide a tool available through the Operator Interface that will reveal the path/identifier needed to allow a third-party Web services device to read data from or write data to any object in the system which supports this service.
2.3 Operator Interface
A. Operator Interface. The web server shall reside on high-speed network with building controllers. Web pages generated by this server shall be compatible with the latest versions of Microsoft Internet Explorer or Edge, Google Chrome, Mozilla Firefox, and Apple Safari browsers. Any of these supported browsers connected to the server shall be able to access all system information. Mobile devices shall be recognized by the web server and shall supply the appropriate system content as needed. The Operator Interface (web server with client devices) shall conform to the BACnet Operator Workstation (B-OWS) or BACnet Advanced Workstation (B-AWS) device profile as specified in ASHRAE/ANSI 135 BACnet Annex L. This includes the ability to configure and/or reconfigure the system from the client device (change programs, graphics, labels, etc.).
B. Communication. Web server and controllers shall communicate using BACnet protocol, including BACnet/SC. Web server and control network backbone shall communicate using ISO 8802-3 (Ethernet) Data Link/Physical layer protocol and BACnet/IP addressing as specified in ANSI/ASHRAE 135, BACnet Annex J. Communication between the web server and client (workstation) shall be HTTP or HTTPS protocol utilizing HTML5 language. Use of Adobe Flash in any part of the communication infrastructure is not acceptable.
C. Hardware.
1. Web server and/or workstation. Industry-standard hardware shall meet or exceed DDC system manufacturer’s recommended specifications and shall meet response times specified elsewhere in this document. The web server may also be configured in client/server fashion to accommodate a “workstation” definition. In “workstation” configuration, the workstation will also perform as a server supplying additional clients as needed. The following hardware requirements apply:
a. System storage shall have sufficient memory to accommodate:
i. All required system software.
ii. A DDC database to accommodate, as a minimum, twice the size of the delivered system database.
iii. One year of archival trend data based on the points specified to be trended at their specified trend intervals.
b. Provide additional hardware (communication ports, video drivers, network interface cards, cabling, etc.) to facilitate all control functions and software requirements specified for the DDC system.
c. Minimum hardware configuration shall include the following:
i. Quad Core Processor
ii. 4-24 GB RAM (size dependent on size of system)
iii. 500 GB hard disk providing data at 3.0 Gb/sec (size dependent on historical data storage requirements)
iv. 16x DVD+/-RW drive
v. Qwerty Keyboard
vi. Optical Mouse
vii. 24-inch LED Color monitor with 75Hz refresh rate and 1080P resolution to provide a minimum screen resolution of 1920 x 1080 pixels. viii. Serial (USB) and network communication ports, with cables as required for proper DDC system operation.
D. System Software.
1. Operating System. Web server shall have an industry-standard professional-grade operating system. Operating system shall meet or exceed the BMS manufacturer’s minimum requirements for their software. Acceptable systems include Microsoft Windows 8.1 or 10, 299
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HVAC Replacement 230900 - 11 Instrumentation and Control for HVAC Windows Server 2012 R2 or 2016 or 2019 or 2020, Red Hat Enterprise Linux 8.3, or Ubuntu Desktop 18.04 or 20.04 LTS.
2. Security. The web server application shall support Transport Layer Security (TLS) 1.3 capable of encryption of up to 256 bit elliptical curve for transmitting private information over the Internet using HTTPS. Additionally, the web server shall have SHA-2 certificate support capability.
3. Database. System shall support any JDBC (Java DataBase Connectivity) compliant engine.
This includes: MS SQL, My SQL, Apache Derby, PostgreSQL and Oracle.
4. The BMS system shall allow an unlimited number of concurrent users.
5. The BMS manufacturer shall provide all software and tools necessary to provide the following capabilities:
a. Create and/or edit any programming used in controllers b. Create and/or edit any graphics used in the system
c. Software shall not be subscription based and be given to owner at time of turnover.
If software is subscription based, manufacturer shall include 10 years of subscription service.
6. System Graphics. The operator interface software shall be graphically based and shall include at least one graphic per piece of equipment or occupied zone, graphics for each chilled water and hot water system, and graphics that summarize conditions on each floor of each building included in this contract. Indicate thermal comfort on floor plan summary graphics using dynamic colors to represent zone temperature relative to zone setpoint. a. Minimum graphics resolution shall be 1920 x 1080 for display of detailed system graphics.
b. Floor Plan Graphics. Floor plan graphics shall be capable of allowing the floor plan graphic to dynamically size relative to the end user’s monitor resolution. c. Functionality. Graphics shall allow operator to monitor system status, to view a summary of the most important data for each controlled zone or piece of equipment, to use point-and-click navigation between zones or equipment, and to edit setpoints and other specified parameters.
d. Animation. Graphics shall be able to animate by displaying different image files for changed object status.
e. Alarm Indication. Indicate areas or equipment in an alarm condition using color or other visual indicator.
f. Format. Graphics shall be saved in an industry-standard format such as BMP, JPEG, PNG, GIF, or SVG. Web-based system graphics shall be viewable on browsers compatible with World Wide Web Consortium browser standards. Web graphic format shall require no plug-in or shall only require widely available no-cost plug-ins.
7. Custom Graphics. Custom graphic files shall be created with the use of a graphics generation package furnished with the system. The graphics generation package shall be a graphically based system used to create and modify graphics that are saved in the same formats as are used for system graphics.
8. Graphics Library. Furnish a complete library of standard HVAC equipment graphics such as chillers, boilers, air handlers, terminals, fan coils, and unit ventilators. This library also shall include standard symbols for other equipment including fans, pumps, coils, valves, piping, dampers, and ductwork. The library shall be furnished in a file format compatible with the graphics generation package program.
E. System Applications. System shall provide the following functionality to authorized operators as an integral part of the operator interface or as stand-alone software programs. If furnished as part of the interface, the tool shall be available from each workstation or web browser interface. If furnished as a stand-alone program, software shall be installable on a standard PC type personal computer with no limit on the number of copies that can be installed under the system license. 300
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1. Automatic System Database Configuration. Each workstation or web server shall store on its hard disk a copy of the current system database, including controller firmware and software.
Stored database shall be automatically updated with each system configuration or controller firmware or software change.
2. Manual Controller Memory Download. Operators shall be able to download memory from the system database to each controller.
3. System Configuration. The workstation software shall provide a method of configuring the system. This shall allow for future system changes or additions by users under proper password.
4. On-Line Help. Provide a context-sensitive, on-line help system to assist the operator in operating and editing the system. On-line help shall be available for all applications and shall provide the relevant data for that particular screen. Additional help information shall be available through the use of hypertext.
5. Security. Each operator shall be required to log on to the system with user name and password in order to view, edit, add, or delete data.
a. Operator Access. The user name and password combination shall define accessible viewing, editing, adding, and deleting privileges for that operator. Users with system administrator rights shall be able to create new users and edit the privileges of all existing users. System administrators shall also be able to vary and deny each operator’s privileges based on the geographic location, such as the ability to edit operating parameters in Building A, to view but not edit parameters in Building B, and to not even see equipment in Building C.
b. Password Policy Rules. System administrator shall invoke policies for minimum password strength, including number of characters, special characters and numbers, upper and lower case, etc.
c. Automatic Log Out. Automatically log out each operator if no keyboard or mouse activity is detected. This auto logoff time period shall be user-adjustable. d. Encrypted Security Data. Store system security data including operator passwords in an encrypted format. System shall not display operator passwords.
6. System Diagnostics. The system shall automatically monitor the operation of all building management panels and controllers. The failure of any device shall be annunciated to the operator.
7. Alarm Processing. System input and status objects shall be configurable to alarm on departing from and on returning to normal state. Operator shall be able to enable or disable each alarm and to configure alarm limits, alarm limit differentials, alarm states, and alarm reactions for each system object. Configure and enable alarm points as required by sequences of operation. Alarms shall be BACnet alarm objects and shall use BACnet alarm services. BMS system shall be capable of assigning alarm sources to categories such as HVAC Critical, or HVAC General. The BMS shall include at a minimum HVAC and FDD categories. BMS system shall allow user to create custom alarm categories.
8. Alarm Messages. Alarm messages shall use the English language descriptor for the object in alarm in such a way that the operator will be able to recognize the source, location, and nature of the alarm without relying on acronyms or mnemonics.
9. Alarm Reactions. Operator shall be able to configure (by object) what, if any actions are to be taken during an alarm. As a minimum, the workstation or web server shall be able to log, print, start programs, display messages, send e-mail, send SMS text, and audibly annunciate.
10. Alarm and Event log. Operators shall be able to view all system alarms and changes of state from any location in the system. Events shall be listed chronologically. An operator with the proper security level may acknowledge and delete alarms, and archive closed alarms to the workstation or web server hard disk.
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11. Trend Logs. The operator shall be able to configure trend sample or change of value (COV) interval, start time, and stop time for each system data object and shall be able to retrieve data for use in spreadsheets and standard database programs. Controller shall sample and store trend data and shall be able to archive data to the hard disk. Configure trends as specified by the sequences of operation. Trends shall be BACnet trend objects.
12. Object and Property Status and Control. Provide a method for the operator to view, and edit if applicable, the status of any object or property in the system. The status shall be available by menu, on graphics, or through custom programs.
13. Reports and Logs. Operator shall be able to select, to modify, to create, and to print reports and logs. Operator shall be able to store report data in a format accessible by standard spreadsheet and word processing programs.
14. Audit and Security Detail. All users accessing the system shall have their actions recorded.
Information recorded shall include:
a. Login/logout time and date
b. System modifications - with before and after values
c. Ability to report user activity based on individual and/or date and time.
15. Standard Reports. Furnish the following standard system reports:
a. Objects. System objects and current values filtered by object type, by status (in alarm, locked, normal), by equipment, by geographic location, or by combination of filter criteria.
b. Alarm Summary. Current alarms and closed alarms. System shall retain closed alarms for an adjustable period.
c. Logs. System shall log the following to a database or text file and shall retain data for an adjustable period:
i. Alarm History.
ii. Trend Data. Operator shall be able to select trends to be logged.
16. Custom Reports. Operator shall be able to create custom reports that retrieve data, including archived trend data, from the system, that analyze data using common algebraic calculations, and that present results in tabular or graphical format. Reports shall be launched from the operator interface. Operator shall be able to schedule reports to automatically run and be emailed to recipients on a recurring basis from the BMS system.
F. Workstation Application Editors. Each PC or browser workstation shall support editing of all system applications. The applications shall be downloaded and executed at one or more of the controller panels.
1. Controller. Provide a full-screen editor for each type of application that shall allow the operator to view and change the configuration, name, control parameters, and set points for all controllers.
2. Scheduling. An editor for the scheduling application shall be provided at each workstation.
Provide a method of selecting the desired schedule and schedule type. Exception schedules and holidays shall be shown clearly on the calendar. The start and stop times for each object shall be adjustable from this interface.
3. Custom Application Programming. Provide the tools to create, edit, debug, and download custom programs. System shall be fully operable while custom programs are edited, compiled, and downloaded. Programming language shall have the following features:
a. Language. Language shall be graphically based or English oriented. If graphically based, language shall use function blocks arranged in a logic diagram that clearly shows control logic flow. Function blocks shall directly provide functions listed below, and operators shall be able to create custom or compound function blocks. If English language oriented, language shall be based on the syntax of BASIC, FORTRAN, C, or PASCAL, and shall allow for free-form programming that is not column-oriented or “fill-in-the-blanks.”
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HVAC Replacement 230900 - 14 Instrumentation and Control for HVAC b. Programming Environment. Tool shall provide a full-screen, cursor-and-mousedriven programming environment that incorporates word processing features such as cut and paste. Operators shall be able to insert, add, modify, and delete custom programming code, and to copy blocks of code to a file library for reuse in other control programs.
c. Independent Program Modules. Operator shall be able to develop independently executing program modules that can disable, enable and exchange data with other program modules.
d. Debugging and Simulation. Operator shall be able to step through the program observing intermediate values and results. Operator shall be able to adjust input variables to simulate actual operating conditions. Operator shall be able to adjust each step’s time increment to observe operation of delays, integrators, and other time-sensitive control logic. Debugger shall provide error messages for syntax and for execution errors.
e. Conditional Statements. Operator shall be able to program conditional logic using compound Boolean (AND, OR, and NOT) and relational (EQUAL, LESS THAN, GREATER THAN, NOT EQUAL) comparisons.
f. Mathematical Functions. Language shall support floating-point addition, subtraction, multiplication, division, and square root operations, as well as absolute value calculation and programmatic selection of minimum and maximum values from a list of values.
g. Variables. Operator shall be able to use variable values in program conditional statements and mathematical functions.
i. Time Variables. Operator shall be able to use predefined variables to represent time of day, day of the week, month of the year, and date. Other predefined variables or simple control logic shall provide elapsed time in seconds, minutes, hours, and days. Operator shall be able to start, stop, and reset elapsed time variables using the program language. ii. System Variables. Operator shall be able to use predefined variables to represent status and results of Controller Software and shall be able to enable, disable, and change setpoints of Controller Software as described in Controller Software section.
2.4 Controller Software
A. All controller software applications shall reside and operate in the system controllers.
B. All application software in controllers furnished by BMS manufacturer shall be editable through operator workstation, web browser interface, or workstation.
C. Each controller furnished by BMS manufacturer shall have all of its local on board software applications backed up and saved to the BMS web server. In the event of a controller failure, the BMS server shall download backed up software applications to replacement controller. Controllers furnished by others and integrated into the BMS are not required to be backed up to BMS server.
D. Furnish the following applications for building and energy management:
1. System Security.
2. Scheduling. Provide the capability to execute control functions according to a user created or edited schedule. Each schedule shall provide the following schedule options as a minimum:
a. Weekly Schedule. Provide separate schedules for each day of the week. Each schedule shall be able to include up to 5 occupied periods (5 start-stop pairs or 10 events).
b. Exception Schedules. Provide the ability for the operator to designate any day of the year as an exception schedule. Exception schedules may be defined up to a year in advance. Once an exception schedule has executed, the system shall discard and replace the exception schedule with the standard schedule for that day of the week. 303
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HVAC Replacement 230900 - 15 Instrumentation and Control for HVAC c. Holiday Schedules. Provide the capability for the operator to define up to 24 special or holiday schedules. These schedules will be repeated each year. The operator shall be able to define the length of each holiday period.
3. System Coordination. Operator shall be able to group related equipment based on function and location and to use these groups for scheduling and other applications.
4. Binary Alarms. Each binary object shall have the capability to be configured to alarm based on the operator-specified state. Provide the capability to automatically and manually disable alarming.
5. Analog Alarms. Each analog object shall have both high and low alarm limits. The operator shall be able to enable or disable these alarms.
6. Alarm Reporting. The operator shall be able to determine the action to be taken in the event of an alarm. An alarm shall be able to start programs, print, be logged in the event log, generate custom messages, and display on graphics.
7. Remote Communication. System shall automatically contact operator workstation or server on receipt of critical alarms. If no network connection is available, system shall use a modem connection.
8. Demand Limiting.
a. The demand-limiting program shall monitor building power consumption from a building power meter (provided by others) which generates pulse signals or a BACnet communications interface. An acceptable alternative is for the system to monitor a watt transducer or current transformer attached to the building feeder lines.
b. When power consumption exceeds adjustable levels, system shall automatically adjust setpoints, de-energize low-priority equipment, and take other programmatic actions to reduce demand as specified in in sequences of operation. When demand drops below adjustable levels, system shall restore loads as specified.
9. Maintenance Management. The system shall be capable of generating maintenance alarms when equipment exceeds adjustable runtime, equipment starts, or performance limits.
Configure and enable maintenance alarms as specified in sequences of operation.
10. Sequencing. Application software shall sequence chillers, boilers, and pumps as specified in sequences of operation.
11. PID Control. System shall provide direct- and reverse-acting PID (proportional-integralderivative) algorithms. Each algorithm shall have anti-windup and selectable controlled variable, setpoint, and PID gains. Each algorithm shall calculate a time-varying analog value that can be used to position an output or to stage a series of outputs. The calculation interval, PID gains, and other tuning parameters shall be adjustable by a user with the correct security level.
12. Staggered Start. System shall stagger controlled equipment restart after power outage.
Operator shall be able to adjust equipment restart order and time delay between equipment restarts.
13. Energy Calculations.
a. The system shall accumulate and convert instantaneous power (kW) or flow rates (L/s [gpm]) to energy usage data.
14. Anti-Short Cycling. All binary output objects shall be protected from short cycling by means of adjustable minimum on-time and off-time settings.
15. On and Off Control with Differential. Provide an algorithm that allows a binary output to be cycled based on a controlled variable and a setpoint. The algorithm shall be direct-acting or reverse-acting.
16. Runtime Totalization. Provide software to totalize runtime for each binary input and output.
Operator shall be able to enable runtime alarm based on exceeded adjustable runtime limit.
Configure and enable runtime totalization and alarms as required by sequences of operation. 304
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2.5 Controllers
A. General. Provide an adequate number of Building Controllers (BC), Advanced Application Controllers (AAC), Application Specific Controllers (ASC), Smart Actuators (SA), and Smart Sensors (SS) as required to achieve performance specified by system performance. Every device in the system which executes control logic and directly controls HVAC equipment must conform to a standard BACnet Device profile as specified in ANSI/ASHRAE 135, BACnet Annex L. Unless otherwise specified, hardwired actuators and sensors may be used in lieu of communicating actuators, communicating sensors, BACnet Smart Actuators and BACnet Smart Sensors.
B. BACnet.
1. Building Controllers (BCs). Each BC shall conform to BACnet Building Controller (B-BC) device profile as specified in ANSI/ASHRAE 135, BACnet Annex L and shall be listed as a certified B-BC in the BACnet Testing Laboratories (BTL) Product Listing.
2. Advanced Application Controllers (AACs). Each AAC shall conform to BACnet Advanced Application Controller (B-AAC) device profile as specified in ANSI/ASHRAE 135, BACnet Annex L and shall be listed as a certified B-AAC in the BACnet Testing Laboratories (BTL) Product Listing.
3. Application Specific Controllers (ASCs). Each ASC shall conform to BACnet Application Specific Controller (B-ASC) device profile as specified in ANSI/ASHRAE 135, BACnet Annex L and shall be listed as a certified B-ASC in the BACnet Testing Laboratories (BTL) Product Listing.
4. Smart Actuators (SAs). An actuator which is controlled by a network connection rather than a binary or analog signal (0-10v, 4-20mA, relay, etc.). Each SA shall conform to BACnet Smart Actuator (B-SA) device profile as specified in ANSI/ASHRAE 135, BACnet Annex L and shall be listed as a certified B-SA in the BACnet Testing Laboratories (BTL) Product Listing.
5. Smart Sensors (SSs). A sensor which provides information to the BAS via network connection rather than a binary or analog signal (0-10000 ohm, 4-20mA, dry contact, etc.).
Each SS shall conform to BACnet Smart Sensor (B-SS) device profile as specified in ANSI/ASHRAE 135, BACnet Annex L and shall be listed as a certified B-SS in the BACnet Testing Laboratories (BTL) Product Listing.
6. BACnet Communication.
a. Each controller residing on the ethernet data link shall capable of providing BACnet/SC capability as described in the above Communication Section. b. Each BC shall reside on or be connected to a BACnet network using ISO 8802-3 (Ethernet) Data Link/Physical layer protocol and BACnet/IP or BACnet/SC. c. BACnet routing shall be performed by BCs or other BACnet device routers as necessary to connect BCs to networks of AACs and ASCs.
d. Each AAC shall reside on a BACnet network using ISO 8802-3 (Ethernet) Data Link/Physical layer protocol using BACnet/IP or BACnet/SC, or it shall reside on a BACnet network using the ARCNET or MS/TP Data Link/Physical layer protocol. e. Each ASC shall reside on a BACnet network using the ARCNET or MS/TP Data Link/Physical layer protocol.
f. Each SA shall reside on a BACnet network using the ARCNET or MS/TP Data Link/Physical layer protocol.
g. Each SS shall reside on a BACnet network using ISO 8802-3 (Ethernet) Data Link/Physical layer protocol with BACnet/IP addressing, or it shall reside on a BACnet network using ARCNET or MS/TP Data Link/Physical layer protocol.
C. Security.
1. Provide BACnet firewall capability, as defined in the BACnet standard, for controllers that are IP capable.
D. Communication.
1. Service Port. Each controller shall provide a service communication port for connection to a Portable Operator’s Terminal.
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2. Signal Management. BC and ASC operating systems shall manage input and output communication signals to allow distributed controllers to share real and virtual object information and to allow for central monitoring and alarms.
3. Data Sharing. Each BC and AAC shall share data as required with each networked BC and AAC.
4. Stand-Alone Operation. Each piece of equipment shall be controlled by a single controller to provide stand-alone control in the event of communication failure. All I/O points specified for a piece of equipment shall be integral to its controller. Provide stable and reliable standalone control using default values or other method for values normally read over the network such as outdoor air conditions, supply air or water temperature coming from source equipment, etc.
E. Environment. Controller hardware shall be suitable for anticipated ambient conditions.
1. Controllers used outdoors or in wet ambient conditions shall be mounted in waterproof enclosures and shall be rated for operation at -29°C to 60°C (-20°F to 140°F).
2. Controllers used in conditioned space shall be mounted in dust-protective enclosures and shall be rated for operation at 0°C to 50°C (32°F to 120°F).
F. Serviceability. Provide diagnostic LEDs for power, communication, and processor. All wiring connections shall be made to a field-removable modular terminal strip or to a termination card connected by a ribbon cable. Each BC and AAC shall continually check its processor and memory circuit status and shall generate an alarm on abnormal operation. System shall continuously check controller network and generate alarm for each controller that fails to respond.
G. Real-time Clock. Controller shall have a real-time clock to keep track of time in the event of a power failure for up to three (3) days.
H. Memory.
1. Controller memory shall support operating system, database, and programming requirements.
2. Each controller shall use volatile memory with battery backed up memory or nonvolatile memory and shall retain BIOS and application programming in the event of power loss.
System shall automatically download dynamic control parameters following power loss.
I. Immunity to Power and Noise. Controllers shall be able to operate at 90% to 110% of nominal voltage rating and shall perform an orderly shutdown below 80% nominal voltage.
J. Transformer. Power supply shall be fused or current limiting and shall be rated at a minimum of 125% of controller power consumption.
2.6 Input and Output Interface
A. General. Hard-wire input and output points to BCs, AACs, or ASCs.
B. Protection. All input points and output points shall be protected such that shorting of the point to itself, to another point, or to ground shall cause no damage to the controller. All input and output points shall be protected from voltage up to 24 V of any duration, such that contact with this voltage will cause no controller damage.
C. Binary Inputs. Binary inputs shall allow the monitoring of ON/OFF signals from remote devices.
Binary inputs shall sense dry contact closure without application of power external to the controller.
D. Pulse Accumulation Inputs. Pulse accumulation inputs shall conform to binary input requirements and shall also accumulate up to 10 pulses per second.
E. Analog Inputs. Analog inputs shall monitor low-voltage (0–10 Vdc), current (4–20 mA), or resistance (thermistor or RTD) signals. Analog inputs shall be compatible with and field configurable to commonly available sensing devices.
F. Binary Outputs. Binary outputs shall provide for ON/OFF operation or a pulsed low-voltage signal for pulse width modulation control. Binary outputs on Building Controllers shall have three-position (onoff-auto) override switches and status lights. Outputs shall be selectable for normally open or normally closed operation.
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HVAC Replacement 230900 - 18 Instrumentation and Control for HVAC G. Analog Outputs. Analog outputs shall provide a modulating signal for the control of end devices.
Outputs shall provide either a 0–10 Vdc or a 4–20 mA signal as required to properly control output devices. Each Building Controller analog output shall have a two-position (auto-manual) switch, a manually adjustable potentiometer, and status lights. Analog outputs shall not drift more than 0.4% of range annually.
H. Tri-State Outputs. Control three-point floating electronic actuators without feedback with tri-state outputs (two coordinated binary outputs). Tri-State outputs may be used to provide analog output control in zone control and terminal unit control applications such as VAV terminal units, ductmounted heating coils, and zone dampers.
I. Universal Inputs and Outputs. Inputs and outputs that can be designated as either binary or analog in software shall conform to the provisions of this section that are appropriate for their designated use.
2.7 Power Supplies and Line Filtering
A. Power Supplies. Control transformers shall be UL listed. Furnish Class 2 current-limiting type or furnish over-current protection in primary and secondary circuits for Class 2 service in accordance with NEC requirements. Limit connected loads to 80% of rated capacity.
1. DC power supply output shall match output current and voltage requirements. Unit shall be full-wave rectifier type with output ripple of 5.0 mV maximum peak-to-peak. Regulation shall be 1.0% line and load combined, with 100-microsecond response time for 50% load changes. Unit shall have built-in over-voltage and over-current protection and shall be able to withstand 150% current overload for at least three seconds without trip-out or failure. a. Unit shall operate between 0°C and 50°C (32°F and 120°F). EM/RF shall meet FCC Class B and VDE 0871 for Class B and MILSTD 810C for shock and vibration. b. Line voltage units shall be UL recognized and CSA listed.
B. Power Line Filtering.
1. Provide internal or external transient voltage and surge suppression for workstations and controllers. Surge protection shall have:
a. Dielectric strength of 1000 V minimum
b. Response time of 10 nanoseconds or less
c. Transverse mode noise attenuation of 65 dB or greater d. Common mode noise attenuation of 150 dB or greater at 40–100 Hz
2.8 Auxiliary Control Devices
A. Motorized Control Dampers, unless otherwise specified elsewhere, shall be as follows:
1. Type. Control dampers shall be the parallel- or opposed-blade type as specified below or as scheduled on drawings.
a. Outdoor and return air mixing dampers and face-and-bypass dampers shall be parallel-blade and shall direct airstreams toward each other. b. Other modulating dampers shall be opposed-blade.
c. Two-position shutoff dampers shall be parallel- or opposed-blade with blade and side seals.
2. Frame. Damper frames shall be 2.38 mm (13 gauge) galvanized steel channel or 3.175 mm (⅛ in.) extruded aluminum with reinforced corner bracing.
3. Blades. Damper blades shall not exceed 20 cm (8 in.) in width or 125 cm (48 in.) in length.
Blades shall be suitable for medium velocity (10 m/s [2000 fpm]) performance. Blades shall be not less than 1.5875 mm (16 gauge).
4. Shaft Bearings. Damper shaft bearings shall be as recommended by manufacturer for application, oil impregnated sintered bronze, or better.
5. Seals. Blade edges and frame top and bottom shall have replaceable seals of butyl rubber or neoprene. Side seals shall be spring-loaded stainless steel. Blade seals shall leak no more than 50 L/s·m2 (10 cfm per ft2) at 1000 Pa (4 in. w.g.) differential pressure. Blades shall be airfoil type suitable for wide-open face velocity of 7.5 m/s (1500 fpm). 307
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6. Sections. Individual damper sections shall not exceed 125 cm × 150 cm (48 in. × 60 in.).
Each section shall have at least one damper actuator.
7. Modulating dampers shall provide a linear flow characteristic where possible.
8. Linkages. Dampers shall have exposed linkages.
B. Electric Damper and Valve Actuators.
1. Stall Protection. Mechanical or electronic stall protection shall prevent actuator damage throughout the actuator’s rotation.
2. Spring-return Mechanism. Actuators used for power-failure and safety applications shall have an internal mechanical spring-return mechanism or an uninterruptible power supply (UPS).
3. Signal and Range. Proportional actuators shall accept a 0–10 Vdc or a 0–20 mA control signal and shall have a 2–10 Vdc or 4–20 mA operating range. (Floating motor actuators may be substituted for proportional actuators in terminal unit applications as described in paragraph 2.6H.)
4. Wiring. 24 Vac and 24 Vdc actuators shall operate on Class 2 wiring.
5. Manual Positioning. Operators shall be able to manually position each actuator when the actuator is not powered. Non-spring-return actuators shall have an external manual gear release. Spring-return actuators with more than 7 N·m (60 in.-lb) torque capacity shall have a manual crank.
C. Control Valves.
1. Control valves shall be two-way or three-way type for two-position or modulating service as shown.
2. Close-off (differential) Pressure Rating: Valve actuator and trim shall be furnished to provide the following minimum close-off pressure ratings:
a. Water Valves:
i. Two-way: 150% of total system (pump) head.
ii. Three-way: 300% of pressure differential between ports A and B at design flow or 100% of total system (pump) head.
b. Steam Valves: 150% of operating (inlet) pressure.
3. Water Valves.
a. Body and trim style and materials shall be in accordance with manufacturer’s recommendations for design conditions and service shown, with equal percentage ports for modulating service.
b. Sizing Criteria:
i. Two-position service: Line size.
ii. Two-way modulating service: Pressure drop shall be equal to twice the pressure drop through heat exchanger (load), 50% of the pressure difference between supply and return mains, or 5 psi, whichever is greater. iii. Three-way modulating service: Pressure drop equal to twice the pressure drop through the coil exchanger (load), 35 kPa (5 psi) maximum. c. Valves ½ in. through 2 in. shall be bronze body or cast brass ANSI Class 250, spring-loaded, PTFE packing, quick opening for two-position service. Two-way valves to have replaceable composition disc or stainless steel ball. d. Valves 2½ in. and larger shall be cast iron ANSI Class 125 with guided plug and PTFE packing.
e. Water valves shall fail normally open or closed, as scheduled on plans, or as follows:
i. Water zone valves—normally open preferred.
ii. Heating coils in air handlers—normally open.
iii. Chilled water control valves—normally closed.
iv. Other applications—as scheduled or as required by sequences of operation.
4. Steam Valves.
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HVAC Replacement 230900 - 20 Instrumentation and Control for HVAC a. Body and trim materials shall be in accordance with manufacturer’s recommendations for design conditions and service with linear ports for modulating service.
b. Sizing Criteria:
i. Two-position service: pressure drop 10% to 20% of inlet psig. ii. Modulating service: 100 kPa (15 psig) or less; pressure drop 80% of inlet psig.
iii. Modulating service: 101 to 350 kPa (16 to 50 psig); pressure drop 50% of inlet psig.
iv. Modulating service: over 350 kPa (50 psig); pressure drop as scheduled on plans.
D. Temperature Sensors.
1. Type. Temperature sensors shall be thermistor (10k Type2).
2. Duct Sensors. Duct sensors shall be single point or averaging as shown. Averaging sensors shall be a minimum of 1.5 m (5 ft) in length per 1 m2(10 ft2) of duct cross-section.
3. Immersion Sensors. Provide immersion sensors with a separable stainless steel well. Well pressure rating shall be consistent with system pressure it will be immersed in. Well shall withstand pipe design flow velocities.
4. Space Sensors. Space sensors shall have setpoint adjustment, override switch, display, and communication port as shown.
5. Differential Sensors. Provide matched sensors for differential temperature measurement.
E. Humidity Sensors.
1. Duct and room sensors shall have a sensing range of 20%–80%.
2. Duct sensors shall have a sampling chamber.
3. Outdoor air humidity sensors shall have a sensing range of 20%–95% RH and shall be suitable for ambient conditions of -40°C–75°C (-40°F–170°F).
4. Humidity sensors shall not drift more than 1% of full scale annually.
F. Flow Switches. Flow-proving switches shall be paddle (water service only) or differential pressure type (air or water service) as shown. Switches shall be UL listed, SPDT snap-acting, and pilot duty rated (125 VA minimum).
1. Paddle switches shall have adjustable sensitivity and NEMA 1 enclosure unless otherwise specified.
2. Differential pressure switches shall have scale range and differential suitable for intended application and NEMA 1 enclosure unless otherwise specified.
G. Relays.
1. Control Relays. Control relays shall be plug-in type, UL listed, and shall have dust cover and LED “energized” indicator. Contact rating, configuration, and coil voltage shall be suitable for application.
2. Time Delay Relays. Time delay relays shall be solid-state plug-in type, UL listed, and shall have adjustable time delay. Delay shall be adjustable ±100% from setpoint shown. Contact rating, configuration, and coil voltage shall be suitable for application. Provide NEMA 1 enclosure for relays not installed in local control panel.
H. Override Timers.
1. Unless implemented in control software, override timers shall be spring-wound line voltage, UL Listed, with contact rating and configuration required by application. Provide 0–6 hour calibrated dial unless otherwise specified. Flush mount timer on local control panel face or where shown.
I. Current Transmitters.
1. AC current transmitters shall be self-powered, combination split-core current transformer type with built-in rectifier and high-gain servo amplifier with 4–20 mA two-wire output. Fullscale unit ranges shall be 10 A, 20 A, 50 A, 100 A, 150 A, and 200 A, with internal zero and span adjustment. Unit accuracy shall be ±1% full-scale at 500 ohm maximum burden.
2. Transmitter shall meet or exceed ANSI/ISA S50.1 requirements and shall be UL/CSA recognized.
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HVAC Replacement 230900 - 21 Instrumentation and Control for HVAC
3. Unit shall be split-core type for clamp-on installation on existing wiring.
J. Current Transformers.
1. AC current transformers shall be UL/CSA recognized and shall be completely encased (except for terminals) in approved plastic material.
2. Transformers shall be available in various current ratios and shall be selected for ±1% accuracy at 5 A full-scale output.
3. Use fixed-core transformers for new wiring installation and split-core transformers for existing wiring installation.
K. Voltage Transmitters.
1. AC voltage transmitters shall be self-powered single-loop (two-wire) type, 4–20 mA output with zero and span adjustment.
2. Adjustable full-scale unit ranges shall be 100–130 Vac, 200–250 Vac, 250–330 Vac, and 400–600 Vac. Unit accuracy shall be ±1% full-scale at 500 ohm maximum burden.
3. Transmitters shall meet or exceed ANSI/ISA S50.1 requirements and shall be UL/CSA recognized at 600 Vac rating.
L. Voltage Transformers.
1. AC voltage transformers shall be UL/CSA recognized, 600 Vac rated, and shall have built-in fuse protection.
2. Transformers shall be suitable for ambient temperatures of 4°C–55°C (40°F–130°F) and shall provide ±0.5% accuracy at 24 Vac and 5 VA load.
3. Windings (except for terminals) shall be completely enclosed with metal or plastic.
M. Power Monitors.
1. Selectable rate pulse output for kWh reading, 4–20 mA output for kW reading, N.O. alarm contact, and ability to operate with 5.0 amp current inputs or 0–0.33 volt inputs.
2. 1.0% full-scale true RMS power accuracy, +0.5 Hz, voltage input range 120–600 V, and auto range select.
3. Under voltage/phase monitor circuitry.
4. NEMA 1 enclosure.
5. Current transformers having a 0.5% FS accuracy, 600 VAC isolation voltage with 0–0.33 V output. If 0–5 A current transformers are provided, a three-phase disconnect/shorting switch assembly is required.
N. Hydronic Flowmeters
1. Insertion-Type Turbine Meter
a. Dual counter-rotating axial turbine elements, each with its own rotational sensing system, and an averaging circuit to reduce measurement errors due to swirl and flow profile distortion. Single turbine for piping 2 inches and smaller. Flow sensing turbine rotors shall be non-metallic and not impaired by magnetic drag. b. Insertion type complete with ‘hot-tap’ isolation valves to enable sensor removal without water supply system shutdown.
c. Sensing method shall be impedance sensing (non magnetic and non photoelectric) d. Volumetric accuracy
i. ± 0.5% of reading at calibrated velocity
ii. ± 1% of reading from 3 to 30 ft/s (10:1 range)
iii. ± 2% of reading from 0.4 to 20 ft/s (50:1 range)
e. Each sensor shall be individually calibrated and tagged accordingly against the manufacturer’s primary standards which must be accurate to within 0.1% of flow rate and traceable to the National Institute of Standards and Technology (NIST). f. Maximum operating pressure of 400 psi and maximum operating temperature of 95°C (200°F) continuous or 105°C (220°F) peak.
g. All wetted metal parts shall be constructed of 316 stainless steel. h. Analog outputs shall consist of non interactive zero and span adjustments, a DC linearly of 0.1% of span, voltage output of 0-10 Vdc, and current output of 4-20 mA.
2. Magnetic Flow-Tube Type Flowmeter
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HVAC Replacement 230900 - 22 Instrumentation and Control for HVAC a. Sensor shall be a magnetic flowmeter, which utilizes Faraday’s Law to measure volumetric fluid flow through a pipe. The flowmeter shall consist of two elements, the sensor and the electronics. The sensor shall generate a measuring signal proportional to the flow velocity in the pipe. The electronics shall convert this EMF into a standard current output.
b. Electronic replacement shall not affect meter accuracy (electronic units are not matched with specific sensors).
c. Four-wire, externally powered, magnetic type flow transmitter with adjustable span and zero, integrally mounted to flow tube. Output signal shall be a digital pulse proportional to the flow rate (to provide maximum accuracy and to handle abrupt changes in flow). Standard 4-20 mA or 0-10 Vdc outputs may be used provided accuracy is as specified.
d. Flow Tube:
i. ANSI class 150 psig steel
ii. ANSI flanges
iii. Protected with PTFE, PFA, or ETFE liner rated for 102°C (245°F) minimum fluid temperature
e. Electrode and grounding material
i. 316L Stainless steel or Hastelloy C
ii. Electrodes shall be fused to ceramic liner and not require o-rings. f. Electrical Enclosure: NEMA 4, 7
g. Approvals:
i. UL or CSA
ii. NSF Drinking Water approval for domestic water applications h. Performance
i. Accuracy shall be ±0.5% of actual reading from 3 to 30 ft/s flow velocities, and 0.015 ft/s from 0.04 to 3 ft/s.
ii. Stability: 0.1% of rate over six months.
iii. Meter repeatability shall be ±0.1% of rate at velocities > 3 ft/s.
3. Magnetic Insertion-Type Flowmeter
a. Magnetic Faraday point velocity measuring device.
b. Insertion type complete with “hot-tap” isolation valves to enable sensor removal without water supply system shutdown.
c. 4-20 mA transmitter proportional to flow or velocity. d. Accuracy: larger of 1% of reading and 0.2 ft/s.
e. Flow range: 0.2 to 20 ft/s, bidirectional.
f. Each sensor shall be individually calibrated and tagged accordingly against the manufacturer’s primary standards which must be accurate to within 0.1% of flow rate and traceable to the National Institute of Standards and Technology (NIST).
4. Vortex Shedding Flowmeter
a. Output: 4-20 mA, 0-10 Vdc, 0-5 Vdc.
b. Maximum Fluid Temperature: 427 °C (800ºF).
c. Wetted Parts: Stainless Steel.
d. Housing: NEMA 4X.
e. Turndown: 25:1 minimum.
f. Accuracy: 0.5% of calibrated span for liquids, 1% of calibrated span for steam and gases.
g. Body: Wafer style or ANSI flanged to match piping specification.
5. Transit-Time Ultrasonic Flowmeter
a. Clamp-On transit-time ultrasonic flowmeter
b. Wide-Beam transducer technology
c. 4-20 mA transmitter proportional to flow or velocity. d. Accuracy: 0.5% of reading in range 1 to 30 ft/s, 0.001 ft/s sensitivity.
O. Thermal Energy Meters
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HVAC Replacement 230900 - 23 Instrumentation and Control for HVAC
1. Matched RTD, solid state, or thermistor temperature sensors with a differential temperature accuracy of ±0.08°C (±0.15°F).
2. Flow meter: See “Hydronic Flowmeters” section.
3. Unit accuracy of ±1% factory calibrated, traceable to NIST with certification.
4. NEMA 1 enclosure.
5. Panel mounted display.
6. UL listed.
7. Isolated 4–20 ma signals for energy rate and supply and return temperatures and flow.
P. Current Switches.
1. Current-operated switches shall be self-powered, solid-state with adjustable trip current.
Select switches to match application current and DDC system output requirements.
Q. Pressure Transducers.
1. Transducers shall have linear output signal and field-adjustable zero and span.
2. Transducer sensing elements shall withstand continuous operating conditions of positive or negative pressure 50% greater than calibrated span without damage.
3. Water pressure transducer diaphragm shall be stainless steel with minimum proof pressure of 1000 kPa (150 psi). Transducer shall have 4–20 mA output, suitable mounting provisions, and block and bleed valves.
4. Water differential pressure transducer diaphragm shall be stainless steel with minimum proof pressure of 1000 kPa (150 psi). Over-range limit (differential pressure) and maximum static pressure shall be 2000 kPa (300psi.) Transducer shall have 4–20 mA output, suitable mounting provisions, and 5-valve manifold.
R. Differential Pressure Switches.
1. Differential pressure switches (air or water service) shall be UL listed, SPDT snap-acting, pilot duty rated (125 VA minimum) and shall have scale range and differential suitable for intended application and NEMA 1 enclosure unless otherwise specified.
S. Pressure-Electric (PE) Switches.
1. Shall be metal or neoprene diaphragm actuated, operating pressure rated for 0–175 kPa (0– 25 psig), with calibrated scale minimum setpoint range of 14–125 kPa (2–18 psig) minimum, UL listed.
2. Provide one- or two-stage switch action (SPDT, DPST, or DPDT) as required by application.
Electrically rated for pilot duty service (125 VA minimum) and/or for motor control.
3. Switches shall be open type (panel-mounted) or enclosed type for remote installation.
Enclosed type shall be NEMA 1 unless otherwise specified.
4. Each pneumatic signal line to PE switches shall have permanent indicating gauge.
T. Occupancy Sensors.
1. Occupancy sensors shall utilize Passive Infrared (PIR) and/or Microphonic Passive technology to detect the presence of people within a room. Sensors shall be mounted as indicated on the approved drawings. The sensor output shall be accessible by any lighting and/or HVAC controller in the system. Occupancy sensors shall be capable of being powered from the lighting or HVAC control panel, as shown on the drawings. Occupancy sensor delay shall be software adjustable through the user interface and shall not require manual adjustment at the sensor.
2.9 Local Control Panels
A. All indoor control cabinets shall be fully enclosed NEMA 1 construction with (hinged door) key-lock latch and removable subpanels. A single key shall be common to all field panels and subpanels.
B. Interconnections between internal and face-mounted devices shall be prewired with color-coded stranded conductors neatly installed in plastic troughs and/or tie-wrapped. Terminals for field connections shall be UL listed for 600 volt service, individually identified per control/interlock drawings, with adequate clearance for field wiring. Control terminations for field connection shall be individually identified per control drawings.
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HVAC Replacement 230900 - 24 Instrumentation and Control for HVAC C. Provide ON/OFF power switch with overcurrent protection for control power sources to each local panel.
2.10 Wiring and Raceways
A. General. Provide copper wiring, plenum cable, and raceways as specified in applicable sections of Division 26.
B. Insulated wire shall use copper conductors and shall be UL listed for 90°C (200°F) minimum service.
PART 3: EXECUTION
3.1 Examination
A. The project plans shall be thoroughly examined for control device and equipment locations. Any discrepancies, conflicts, or omissions shall be reported to the architect/engineer for resolution before rough-in work is started.
B. The contractor shall inspect the site to verify that equipment may be installed as shown. Any discrepancies, conflicts, or omissions shall be reported to the engineer for resolution before rough-in work is started.
C. The contractor shall examine the drawings and specifications for other parts of the work. If head room or space conditions appear inadequate—or if any discrepancies occur between the plans and the contractor’s work and the plans and the work of others—the contractor shall report these discrepancies to the engineer and shall obtain written instructions for any changes necessary to accommodate the contractor’s work with the work of others. Any changes in the work covered by this specification made necessary by the failure or neglect of the contractor to report such discrepancies shall be made by—and at the expense of—this contractor.
3.2 Protection
A. The contractor shall protect all work and material from damage by his/her work or employees and shall be liable for all damage thus caused.
B. The contractor shall be responsible for his/her work and equipment until finally inspected, tested, and accepted. The contractor shall protect any material that is not immediately installed. The contractor shall close all open ends of work with temporary covers or plugs during storage and construction to prevent entry of foreign objects.
3.3 Coordination
A. Site
1. Where the mechanical work will be installed in close proximity to, or will interfere with, work of other trades, the contractor shall assist in working out space conditions to make a satisfactory adjustment. If the contractor installs his/her work before coordinating with other trades, so as to cause any interference with work of other trades, the contractor shall make the necessary changes in his/her work to correct the condition without extra charge.
2. Coordinate and schedule work with other work in the same area and with work dependent upon other work to facilitate mutual progress.
B. Test and Balance.
1. The contractor shall furnish a single set of all tools necessary to interface to the control system for test and balance purposes.
2. The contractor shall provide training in the use of these tools. This training will be planned for a minimum of 8 hours.
3. In addition, the contractor shall provide a qualified technician to assist in the test and balance process, until the first 20 terminal units are balanced.
4. The tools used during the test and balance process will be returned at the completion of the testing and balancing.
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HVAC Replacement 230900 - 25 Instrumentation and Control for HVAC C. Life Safety.
1. Duct smoke detectors required for air handler shutdown are provided under Division 28.
Interlock smoke detectors to air handlers for shutdown as specified in sequences of operation.
2. Smoke dampers and actuators required for duct smoke isolation are provided under Division
23. Interlock smoke dampers to air handlers as specified in sequences of operation.
3. Fire and smoke dampers and actuators required for fire-rated walls are provided under Division 23. Fire and smoke damper control is provided under Division 28.
D. Coordination with controls specified in other sections or divisions. Other sections and/or divisions of this specification include controls and control devices that are to be part of or interfaced to the control system specified in this section. These controls shall be integrated into the system and coordinated by the contractor as follows:
1. All communication media and equipment shall be provided as specified in Section 23 09 23 Article 2.2 (Communication).
2. Each supplier of a controls product is responsible for the configuration, programming, start up, and testing of that product to meet the sequences of operation described in Section 23 09 93.
3. The contractor shall coordinate and resolve any incompatibility issues that arise between control products provided under this section and those provided under other sections or divisions of this specification.
4. The contractor is responsible for providing all controls described in the contract documents regardless of where within the contract documents these controls are described.
5. The contractor is responsible for the interface of control products provided by multiple suppliers regardless of where this interface is described within the contract documents.
3.4 General Workmanship
A. Install equipment, piping, and wiring/raceway parallel to building lines (i.e. horizontal, vertical, and parallel to walls) wherever possible.
B. Provide sufficient slack and flexible connections to allow for vibration of piping and equipment.
C. Install equipment in readily accessible locations as defined by Chapter 1 Article 100 Part A of the National Electrical Code (NEC).
D. Verify integrity of all wiring to ensure continuity and freedom from shorts and grounds.
E. All equipment, installation, and wiring shall comply with industry specifications and standards for performance, reliability, and compatibility and be executed in strict adherence to local codes and standard practices.
3.5 Field Quality Control
A. All work, materials, and equipment shall comply with rules and regulations of applicable local, state, and federal codes and ordinances as identified in Section 23 09 23 Article 1.8 (Codes and Standards).
B. Contractor shall continually monitor the field installation for code compliance and quality of workmanship.
C. Contractor shall have work inspection by local and/or state authorities having jurisdiction over the work.
3.6 Wiring
A. All control and interlock wiring shall comply with national and local electrical codes, and Division 26 of this specification, Where the requirements of this section differ from Division 26, the requirements of this section shall take precedence.
B. All NEC Class 1 (line voltage) wiring shall be UL listed in approved raceway according to NEC and Division 26 requirements.
C. All low-voltage wiring shall meet NEC Class 2 requirements. Low-voltage power circuits shall be subfused when required to meet Class 2 current limit.
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HVAC Replacement 230900 - 26 Instrumentation and Control for HVAC D. Where NEC Class 2 (current-limited) wires are in concealed and accessible locations, including ceiling return air plenums, approved cables not in raceway may be used provided that cables are UL listed for the intended application.
E. All wiring in mechanical, electrical, or service rooms – or where subject to mechanical damage – shall be installed in raceway at levels below 3 m (10ft).
F. Do not install Class 2 wiring in raceways containing Class 1 wiring. Boxes and panels containing high-voltage wiring and equipment may not be used for low-voltage wiring except for the purpose of interfacing the two (e.g. relays and transformers).
G. Do not install wiring in raceway containing tubing.
H. Where Class 2 wiring is run exposed, wiring is to be run parallel along a surface or perpendicular to it and neatly tied at 3 m (10 ft) intervals.
I. Where plenum cables are used without raceway, they shall be supported from or anchored to structural members. Cables shall not be supported by or anchored to ductwork, electrical raceways, piping, or ceiling suspension systems.
J. All wire-to-device connections shall be made at a terminal block or terminal strip. All wire-to-wire connections shall be at a terminal block.
K. All wiring within enclosures shall be neatly bundled and anchored to permit access and prevent restriction to devices and terminals.
L. Maximum allowable voltage for control wiring shall be 120 V. If only higher voltages are available, the contractor shall provide step-down transformers.
M. All wiring shall be installed as continuous lengths, with no splices permitted between termination points.
N. Install plenum wiring in sleeves where it passes through walls and floors. Maintain fire rating at all penetrations.
O. Size of raceway and size and type of wire type shall be the responsibility of the contractor in keeping with the manufacturer’s recommendations and NEC requirements, except as noted elsewhere.
P. Include one pull string in each raceway 2.5 cm (1 in.) or larger.
Q. Use color-coded conductors throughout with conductors of different colors.
R. Control and status relays are to be located in designated enclosures only. These enclosures include packaged equipment control panel enclosures unless they also contain Class 1 starters.
S. Conceal all raceways except within mechanical, electrical, or service rooms. Install raceway to maintain a minimum clearance of 15 cm (6 in.) from high-temperature equipment (e.g. steam pipes or flues).
T. Secure raceways with raceway clamps fastened to the structure and spaced according to code requirements. Raceways and pull boxes may not be hung on flexible duct strap or tie rods.
Raceways may not be run on or attached to ductwork.
U. Adhere to this specification’s Division 26 requirements where raceway crosses building expansion joints.
V. Install insulated bushings on all raceway ends and openings to enclosures. Seal top end of vertical raceways.
W. The contractor shall terminate all control and/or interlock wiring and shall maintain updated (as-built) wiring diagrams with terminations identified at the job site.
X. Flexible metal raceways and liquid-tight flexible metal raceways shall not exceed 1 m (3 ft) in length and shall be supported at each end. Flexible metal raceway less than ½ in. electrical trade size shall not be used. In areas exposed to moisture, including chiller and boiler rooms, liquid-tight, flexible metal raceways shall be used.
Y. Raceway must be rigidly installed, adequately supported, properly reamed at both ends, and left clean and free of obstructions. Raceway sections shall be joined with couplings (according to code).
Terminations must be made with fittings at boxes, and ends not terminating in boxes shall have bushings installed.
3.7 Communication Wiring
A. The contractor shall adhere to the items listed in the “Wiring” article in Part 3 of the specification. 315
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HVAC Replacement 230900 - 27 Instrumentation and Control for HVAC B. All cabling shall be installed in a neat and workmanlike manner. Follow manufacturer’s installation recommendations for all communication cabling
C. Do not install communication wiring in raceways and enclosures containing Class 1 or other Class 2 wiring.
D. Maximum pulling, tension, and bend radius for the cable installation, as specified by the cable manufacturer, shall not be exceeded during installation.
E. Contractor shall verify the integrity of the entire network following cable installation. Use appropriate test measures for each particular cable.
F. When a cable enters or exits a building, a lightning arrestor must be installed between the lines and ground. The lighting arrestor shall be installed according to manufacturer’s instructions.
G. All runs of communication wiring shall be unspliced length when that length is commercially available.
H. All communication wiring shall be labeled to indicate origination and destination data.
I. Grounding of coaxial cable shall be in accordance with NEC regulations article on “Communications Circuits, Cable, and Protector Grounding.”
J. BACnet IP, Arcnet, or MS/TP communications wiring shall be installed in accordance with ASHRAE/ANSI Standard 135. This includes but is not limited to:
1. IP
a. The network shall use Cat5e or greater cabling for connections. b. Custom made patch cables must use either the T568A or T568 wiring standard and must use the same standard on both ends of the cable.
2. Arcnet
a. The network shall use shielded, twisted-pair cable with characteristic impedance between 100 nominal. Distributed capacitance between conductors shall be less than 12.5 pF per foot (41 pF per meter.)
b. The maximum length of an Arcnet segment is 610 meters (2000 ft) with AWG 22 cable.
c. The maximum number of nodes per segment shall be 32, as specified in the EIA 485 standard. Additional nodes may be accommodated by the use of repeaters. d. An Arcnet network shall have no T connections
3. MS/TP
a. The network shall use shielded, twisted-pair cable with characteristic impedance between 100 and 120 ohms. Distributed capacitance between conductors shall be less than 100 pF per meter (30 pF per foot.)
b. The maximum length of an MS/TP segment is 1200 meters (4000 ft) with AWG 18 cable. The use of greater distances and/or different wire gauges shall comply with the electrical specifications of EIA-485.
c. The maximum number of nodes per segment shall be 32, as specified in the EIA 485 standard. Additional nodes may be accommodated by the use of repeaters. d. An MS/TP EIA-485 network shall have no T connections.
3.8 Fiber Optic Cable
A. Maximum pulling tensions as specified by the cable manufacturer shall not be exceeded during installation. Post-installation residual cable tension shall be within cable manufacturer’s specifications.
B. All cabling and associated components shall be installed in accordance with manufacturers’ instructions. Minimum cable and unjacketed fiber bend radii, as specified by cable manufacturer, shall be maintained.
3.9 Installation of Sensors
A. Install sensors in accordance with the manufacturer’s recommendations.
B. Mount sensors rigidly and adequately for environment within which the sensor operates.
C. Room temperature sensors shall be installed on concealed junction boxes properly supported by wall framing.
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HVAC Replacement 230900 - 28 Instrumentation and Control for HVAC D. All wires attached to sensors shall be sealed in their raceways or in the wall to stop air transmitted from other areas from affecting sensor readings.
E. Sensors used in mixing plenums and hot and cold decks shall be of the averaging type. Averaging sensors shall be installed in a serpentine manner vertically across the duct. Each bend shall be supported with a capillary clip.
F. Low-limit sensors used in mixing plenums shall be installed in a serpentine manner horizontally across duct. Each bend shall be supported with a capillary clip. Provide 3 m (10 ft) of sensing element for each 1 m2 (1 ft2) of coil area.
G. Do not install temperature sensors within the vapor plume of a humidifier. If installing a sensor downstream of a humidifier, install it at least 3 m (10 ft) downstream.
H. All pipe-mounted temperature sensors shall be installed in wells. Install liquid temperature sensors with heat-conducting fluid in thermal wells.
I. Install outdoor air temperature sensors on north wall, complete with sun shield at designated location.
J. Differential Air Static Pressure.
1. Supply Duct Static Pressure. Pipe the high-pressure tap to the duct using a pitot tube. Pipe the low-pressure port to a tee in the high-pressure tap tubing of the corresponding building static pressure sensor (if applicable) or to the location of the duct high-pressure tap and leave open to the plenum.
2. Return Duct Static Pressure. Pipe high-pressure tap to duct using a pitot tube. Pipe the lowpressure port to a tee in the low-pressure tap tubing of the corresponding building static pressure sensor.
3. Building Static Pressure. Pipe the low-pressure port of the pressure sensor to the static pressure port located on the outside of the building through a high-volume accumulator. Pipe the high-pressure port to a location behind a thermostat cover.
4. The piping to the pressure ports on all pressure transducers shall contain a capped test port located adjacent to the transducer.
5. All pressure transducers, other than those controlling VAV boxes, shall be located in field device panels, not on the equipment monitored or on ductwork. Mount transducers in a location accessible for service without use of ladders or special equipment.
6. All air and water differential pressure sensors shall have gauge tees mounted adjacent to the taps. Water gauges shall also have shut-off valves installed before the tee.
K. Smoke detectors, freezestats, high-pressure cut-offs, and other safety switches shall be hard-wired to de-energize equipment as described in the sequence of operation. Switches shall require manual reset. Provide contacts that allow DDC software to monitor safety switch status.
L. Install humidity sensors for duct mounted humidifiers at least 3 m (10 ft) downstream of the humidifier. Do not install filters between the humidifier and the sensor.
3.10 Flow Switch Installation
A. Use correct paddle for pipe diameter.
B. Adjust flow switch according to manufacturer’s instructions.
3.11 Actuators
A. General. Mount and link control damper actuators according to manufacturer’s instructions.
1. To compress seals when spring-return actuators are used on normally closed dampers, power actuator to approximately 5° open position, manually close the damper, and then tighten the linkage.
2. Check operation of damper/actuator combination to confirm that actuator modulates damper smoothly throughout stroke to both open and closed positions.
3. Provide all mounting hardware and linkages for actuator installation.
B. Electric/Electronic
1. Dampers: Actuators shall be direct mounted on damper shaft or jackshaft unless shown as a linkage installation. For low-leakage dampers with seals, the actuator shall be mounted with 317
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HVAC Replacement 230900 - 29 Instrumentation and Control for HVAC a minimum 5° travel available for tightening the damper seal. Actuators shall be mounted following manufacturer’s recommendations.
2. Valves: Actuators shall be connected to valves with adapters approved by the actuator manufacturer. Actuators and adapters shall be mounted following the actuator manufacturer’s recommendations.
3.12 Warning Labels
A. Permanent warning labels shall be affixed to all equipment that can be automatically started by the control system.
1. Labels shall use white lettering (12-point type or larger) on a red background.
2. Warning labels shall read as follows.
a. C A U T I O N: This equipment is operating under automatic control and may start or stop at any time without warning. Switch disconnect to “Off” position before servicing.
B. Permanent warning labels shall be affixed to all motor starters and control panels that are connected to multiple power sources utilizing separate disconnects.
1. Labels shall use white lettering (12-point type or larger) on a red background.
2. Warning labels shall read as follows.
a. C A U T I O N: This equipment is fed from more than one power source with separate disconnects. Disconnect all power sources before servicing.
3.13 Identification of Hardware and Wiring
A. All wiring and cabling, including that within factory-fabricated panels shall be labeled at each end within 5 cm (2 in.) of termination with control system address or termination number.
B. All pneumatic tubing shall be labeled at each end within 5 cm (2 in.) of termination with a descriptive identifier.
C. Permanently label or code each point of field terminal strips to show the instrument or item served.
D. Identify control panels with minimum 1 cm (½ in.) letters on laminated plastic nameplates.
E. Identify all other control components with permanent labels. All plug-in components shall be labeled such that label removal of the component does not remove the label.
F. Identify room sensors related to terminal boxes or valves with nameplates.
G. Manufacturers’ nameplates and UL or CSA labels shall be visible and legible after equipment is installed.
H. Identifiers shall match record documents.
3.14 Controllers
A. Provide a separate controller for each AHU or other HVAC system. A DDC controller may control more than one system provided that all points associated with the system are assigned to the same DDC controller. Points used for control loop reset, such as outside air or space temperature, are exempt from this requirement.
B. Building Controllers and Custom Application Controllers shall be selected to provide the required I/O point capacity required to monitor all of the hardware points listed in sequences of operation.
3.15 Programming
A. Provide sufficient internal memory for the specified sequences of operation and trend logging.
B. Point Naming. Coordinate with owner for point naming conventions. Name points as shown on the equipment points list provided with each sequence of operation or as directed by owner. If character limitations or space restrictions make it advisable to shorten the name, abbreviations as coordinated with owner may be used. Where multiple points with the same name reside in the same controller, each point name may be customized with its associated Program Object number. For example, “Zone Temp 1” for Zone 1, “Zone Temp 2” for Zone 2.
C. Software Programming.
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HVAC Replacement 230900 - 30 Instrumentation and Control for HVAC
1. Provide programming for the system and adhere to the sequences of operation provided. All other system programming necessary for the operation of the system, but not specified in this document, also shall be provided by the contractor. Embed into the control program sufficient comment statements to clearly describe each section of the program. The comment statements shall reflect the language used in the sequences of operation. Use the appropriate technique based on the following programming types:
a. Text-based:
i. Must provide actions for all possible situations
ii. Must be modular and structured
iii. Must be commented
b. Graphic-based:
i. Must provide actions for all possible situations
ii. Must be documented
c. Parameter-based:
i. Must provide actions for all possible situations
ii. Must be documented.
D. Operator Interface.
1. Standard Graphics. Provide graphics for all mechanical systems and floor plans of the building. This includes each chilled water system, hot water system, chiller, boiler, air handler, and all terminal equipment. Point information on the graphic displays shall dynamically update. Show on each graphic all input and output points for the system. Also show relevant calculated points such as setpoints. As a minimum, show on each equipment graphic the input and output points and relevant calculated points as indicated on the applicable Points List or sequence of operation.
2. The contractor shall provide all the labor necessary to install, initialize, start up, and troubleshoot all operator interface software and its functions as described in this section.
This includes any operating system software, the operator interface database, and any thirdparty software installation and integration required for successful operation of the operator interface.
3.16 Control System Checkout and Testing
A. Startup Testing. All testing listed in this article shall be performed by the contractor and shall make up part of the necessary verification of an operating control system. This testing shall be completed before the owner’s representative is notified of the system demonstration.
1. The contractor shall furnish all labor and test apparatus required to calibrate and prepare for service of all instruments, controls, and accessory equipment furnished under this specification.
2. Verify that all control wiring is properly connected and free of all shorts and ground faults.
Verify that terminations are tight.
3. Enable the control systems and verify calibration of all input devices individually. Perform calibration procedures according to manufacturers’ recommendations.
4. Verify that all binary output devices (relays, solenoid valves, two-position actuators and control valves, magnetic starters, etc.) operate properly and that the normal positions are correct.
5. Verify that all analog output devices (I/Ps, actuators, etc.) are functional, that start and span are correct, and that direction and normal positions are correct. The contractor shall check all control valves and automatic dampers to ensure proper action and closure. The contractor shall make any necessary adjustments to valve stem and damper blade travel.
6. Verify that the system operation adheres to the sequences of operation. Simulate and observe all modes of operation by overriding and varying inputs and schedules. Tune all DDC loops.
7. Alarms and Interlocks:
a. Check each alarm separately by including an appropriate signal at a value that will trip the alarm.
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HVAC Replacement 230900 - 31 Instrumentation and Control for HVAC b. Interlocks shall be tripped using field contacts to check the logic, as well as to ensure that the fail-safe condition for all actuators is in the proper direction. c. Interlock actions shall be tested by simulating alarm conditions to check the initiating value of the variable and interlock action.
3.17 Control System Demonstration and Acceptance
A. Demonstration.
1. Prior to acceptance, the control system shall undergo a series of performance tests to verify operation and compliance with this specification. These tests shall occur after the Contractor has completed the installation, started up the system, and performed his/her own tests.
2. The tests described in this section are to be performed in addition to the tests that the contractor performs as a necessary part of the installation, start-up, and debugging process and as specified in the “Control System Checkout and Testing” article in Part 3 of this specification. The engineer will be present to observe and review these tests. The engineer shall be notified at least 10 days in advance of the start of the testing procedures.
3. The demonstration process shall follow that approved in Part 1, “Submittals.” The approved checklists and forms shall be completed for all systems as part of the demonstration.
4. The contractor shall provide at least two persons equipped with two-way communication and shall demonstrate actual field operation of each control and sensing point for all modes of operation including day, night, occupied, unoccupied, fire/smoke alarm, seasonal changeover, and power failure modes. The purpose is to demonstrate the calibration, response, and action of every point and system. Any test equipment required to prove the proper operation shall be provided by and operated by the contractor.
5. As each control input and output is checked, a log shall be completed showing the date, technician’s initials, and any corrective action taken or needed.
6. Demonstrate compliance with Part 1, “System Performance.”
7. Demonstrate compliance with sequences of operation through all modes of operation.
8. Demonstrate complete operation of operator interface.
9. Additionally, the following items shall be demonstrated:
a. DDC loop response. The contractor shall supply trend data output in a graphical form showing the step response of each DDC loop. The test shall show the loop’s response to a change in set point, which represents a change of actuator position of at least 25% of its full range. The sampling rate of the trend shall be from 10 seconds to 3 minutes, depending on the speed of the loop. The trend data shall show for each sample the set point, actuator position, and controlled variable values.
Any loop that yields unreasonably under-damped or over-damped control shall require further tuning by the Contractor.
b. Demand limiting. The contractor shall supply a trend data output showing the action of the demand limiting algorithm. The data shall document the action on a minuteby-minute basis over at least a 30-minute period. Included in the trend shall be building kW, demand limiting set point, and the status of sheddable equipment outputs.
c. Optimum start/stop. The contractor shall supply a trend data output showing the capability of the algorithm. The change-of-value or change-of-state trends shall include the output status of all optimally started and stopped equipment, as well as temperature sensor inputs of affected areas.
d. Interface to the building fire alarm system.
e. Operational logs for each system that indicate all set points, operating points, valve positions, mode, and equipment status shall be submitted to the architect/engineer.
These logs shall cover three 48-hour periods and have a sample frequency of not more than 10 minutes. The logs shall be provided in both printed and disk formats.
10. Any tests that fail to demonstrate the operation of the system shall be repeated at a later date. The contractor shall be responsible for any necessary repairs or revisions to the hardware or software to successfully complete all tests. 320
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HVAC Replacement 230900 - 32 Instrumentation and Control for HVAC B. Acceptance.
1. All tests described in this specification shall have been performed to the satisfaction of both the engineer and owner prior to the acceptance of the control system as meeting the requirements of completion. Any tests that cannot be performed due to circumstances beyond the control of the contractor may be exempt from the completion requirements if stated as such in writing by the engineer. Such tests shall then be performed as part of the warranty.
2. The system shall not be accepted until all forms and checklists completed as part of the demonstration are submitted and approved as required in Part 1, “Submittals.”
3.18 Cleaning
A. The contractor shall clean up all debris resulting from his/her activities daily. The contractor shall remove all cartons, containers, crates, etc., under his/her control as soon as their contents have been removed. Waste shall be collected and placed in a designated location.
B. At the completion of work in any area, the contractor shall clean all work, equipment, etc., keeping it free from dust, dirt, and debris, etc.
C. At the completion of work, all equipment furnished under this section shall be checked for paint damage, and any factory-finished paint that has been damaged shall be repaired to match the adjacent areas. Any cabinet or enclosure that has been deformed shall be replaced with new material and repainted to match the adjacent areas.
3.19 Training
A. Provide training for a designated staff of Owner’s representatives. Provide 24 hours of onsite training B. Training shall enable students to accomplish the following objectives.
1. Day-to-day Operators:
a. Proficiently operate the system
b. Understand control system architecture and configuration c. Understand DDC system components
d. Understand system operation, including DDC system control and optimizing routines (algorithms)
e. Operate the workstation and peripherals
f. Log on and off the system
g. Access graphics, point reports, and logs
h. Adjust and change system set points, time schedules, and holiday schedules i. Recognize malfunctions of the system by observation of the printed copy and graphical visual signals
j. Understand system drawings and Operation and Maintenance manual k. Understand the job layout and location of control components l. Access data from DDC controllers and ASCs
m. Operate portable operator’s terminals
2. System Managers/Administrators:
a. Maintain software and prepare backups
b. Add new users and understand password security procedures C. Organize the training into sessions or modules for the two levels of operators listed above. (Day-toDay Operators and System Managers and Administrators).
3.20 Sequences of Operation
A. See Section 23 Sequences of Operation
3.21 Control Valve Installation
A. Valve submittals shall be coordinated for type, quantity, size, and piping configuration to ensure compatibility with pipe design.
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HVAC Replacement 230900 - 33 Instrumentation and Control for HVAC B. Slip-stem control valves shall be installed so that the stem position is not more than 60 degrees from the vertical up position. Ball type control valves shall be installed with the stem in the horizontal position.
C. Valves shall be installed in accordance with the manufacturer’s recommendations.
D. Control valves shall be installed so that they are accessible and serviceable and so that actuators may be serviced and removed without interference from structure or other pipes and/or equipment.
E. Isolation valves shall be installed so that the control valve body may be serviced without draining the supply/return side piping system. Unions shall be installed at all connections to screw-type control valves.
F. Provide tags for all control valves indicating service and number. Tags shall be brass, 1.5 inch in diameter, with ¼ inch high letters. Securely fasten with chain and hook. Match identification numbers as shown on approved controls shop drawings.
3.22 Duct Smoke Detection
A. Submit data for coordination of duct smoke detector interface to HVAC systems as required in Part 1, “Submittals.”
B. This Contractor shall provide a dry-contact alarm output in the same room as the HVAC equipment to be controlled.
3.23 Start-Up and Checkout Procedures
A. Start up, check out, and test all hardware and software and verify communication between all components.
1. Verify that all control wiring is properly connected and free of all shorts and ground faults.
Verify that terminations are tight.
2. Verify that all analog and binary input/output points read properly.
3. Verify alarms and interlocks.
4. Verify operation of the integrated system.
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HVAC Replacement 230900 - 34 Instrumentation and Control for HVAC APPENDIX A: Definitions
Terms used within the Specification Text:
• Adjustable (adj.):
Adjustable by the end user, through the supplied user interface. • Advanced Application Controller (AAC):
A fully programmable control module. This control module may be capable of some of the advanced features found in Building Controllers (storing trends, initiating read and write requests, etc.) but it does not serve as a master controller. Advanced Application Controllers may reside on either the Ethernet/IP backbone or on a subnet. • Alarm:
The control system shall be configured to generate an alarm when this object exceeds user definable limits, as described in the Sequence of Controls.
• Analog Value:
An intermediate (software) point that may be editable or read-only. Editable AVs are typically used to allow the user to set a fixed control parameter, such as a setpoint. Read Only AVs are typically used to display the status of a control operation.
• Application Specific Controller (ASC):
A pre-programmed control module which is intended for use in a specific application. ASCs may be configurable, in that the user can choose between various pre-programmed options, but it does not support full custom programming. ASCs are often used on terminal equipment such as VAV boxes or fan coil units. In many vendors’ architectures ASCs do not store trends or schedules but instead rely upon a Building Controller to provide those functions.
• BACnet Interoperability Building Blocks (BIBB):
A BIBB defines a small portion of BACnet functionality that is needed to perform a particular task. BIBBS are combined to build the BACnet functional requirements for a device in a specification. • BACnet/BACnet Standard:
BACnet communication requirements as defined by the latest version of ASHRAE/ANSI 135 and approved addenda. • Binary Value:
An intermediate (software) point that may be editable or read-only. Editable BVs are typically used to allow the user to set a fixed control parameter, such as a setpoint. Read Only BVs are typically used to display the status of a control operation. • Building Controller (BC):
A fully programmable control module which is capable of storing trends and schedules, serving as a router to devices on a subnet, and initiating read and write requests to other controllers. Typically this 323
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HVAC Replacement 230900 - 35 Instrumentation and Control for HVAC controller is located on the Ethernet/IP backbone of the BAS. In many vendors’ architectures a Building Controller will serve as a master controller, storing schedules and trends for controllers on a subnet underneath the Building Controller. • Control Systems Server:
A computer(s) that maintain(s) the systems configuration and programming database. • Controller:
Intelligent stand-alone control device. Controller is a generic reference to building controllers, custom application controllers, and application specific controllers. • Direct Digital Control (DDC):
Microprocessor-based control including Analog/Digital conversion and program logic. • Furnished or Provided:
The act of supplying a device or piece of equipment as required meeting the scope of work specified and making that device or equipment operational. All costs required to furnish the specified device or equipment and make it operational are borne by the division specified to be responsible for providing the device or equipment. • Gateway:
Bi-directional protocol translator connecting control systems that use different communication protocols. • Install or Installed:
The physical act of mounting, piping or wiring a device or piece of equipment in accordance with the manufacturer's instructions and the scope of work as specified. All costs required to complete the installation are borne by the division specified to include labor and any ancillary materials. • Integrate:
The physical connections from a control system to all specified equipment through an interface as required to allow the specified control and monitoring functions of the equipment to be performed via the control system.
• Interface:
The physical device required to provide integration capabilities from an equipment vendor's product to the control system. The equipment vendor most normally furnishes the interface device. An example of an interface is the chilled water temperature reset interface card provided by the chiller manufacturer in order to allow the control system to integrate the chilled water temperature reset function into the control system. • Local Area Network:
Computer or control system communications network limited to local building or campus. • Loop or control loop:
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HVAC Replacement 230900 - 36 Instrumentation and Control for HVAC Most commonly a PID control loop. Typically, a control loop will include a setpoint, an input which is compared to the setpoint, and an output which controls some action based upon the difference between the input and the setpoint. A PID control loop will also include gains for the proportional, integral, and derivative response as well as an interval which controls how frequently the control loop updates its output.
These gains may be adjustable by the end user for control loop “tuning,” but in self-tuning control loops or loops which have been optimized for a specific application the gains may not be adjustable. • Master-Slave/Token Passing (MS/TP):
Data link protocol as defined by the BACnet standard.
• Point-to-Point:
Serial communication as defined in the BACnet standard. • Primary Controlling LAN:
High speed, peer-to-peer controller LAN connecting BCs and optionally AACs and ASCs. Refer to System Architecture below. • Protocol Implementation Conformance Statement (PICS):
A written document that identifies the particular options specified by BACnet that are implemented in a device.
• Router:
A device that connects two or more networks at the network layer. • Schedule:
The control algorithm for this equipment shall include a user editable schedule. • Trend:
The control system shall be configured to collect and display a trend log of this object. The trending interval shall be no less than one sample every 5 minutes. (Change of Value trending, where a sample is taken every time the value changes by more than a user-defined minimum, is an acceptable alternative.) • Web services:
Web services are a standard method of exchanging data between computer systems using the XML (extensible markup language) and SOAP (simple object access protocol) standards. Web services can be used at any level within a Building Automation System (BAS), but most commonly they are used to transfer data between BAS using different protocols or between a BAS and a non-BAS system such as a tenant billing system or a utility management system. • Wiring:
Raceway, fittings, wire, boxes and related items.
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HVAC Replacement 230900 - 37 Instrumentation and Control for HVAC APPENDIX B: Abbreviations
The following abbreviations are utilized within this section and the sequences of operations. Refer to mechanical drawings for additional abbreviations.
AC – Air Conditioning
ACU – Air Conditioning Unit
AHU – Air Handling Unit
AI – Analog Input
AO – Analog Output
ATC – Automatic Temperature Control
AUTO – Automatic
AUX – Auxiliary
AV – Analog Value
BAS – Building Automation System
BI – Binary Input
BO – Binary Output
BV – Binary Value
C – Common
CFM – Cubic Feet per Minute
CHW – Chilled Water
CHWP – Chilled Water Pump
CHWR – Chilled Water Return
CHWS – Chilled Water Supply
COND – Condenser
CV – Constant Volume
CW – Condenser Water
CWP – Condenser Water Pump
CWR – Condenser Water Return
CWS – Condenser Water Supply
DA – Discharge Air
DDC – Direct Digital Control
DI – Digital Input
DO – Digital Output
EA – Exhaust Air
EF – Exhaust Fan
EVAP – Evaporators
FAS – Fire Alarm System
FCU – Fan Coil Unit
HOA – Hand / Off / Auto
HP – Heat Pump
HRU – Heat Recovery Unit
HVAC – Heating, Ventilating, and Air Conditioning
HW – Hot Water
HWP – Hot Water Pump
HWR – Hot Water Return
HWS – Hot Water Supply
HX – Heat Exchanger
IU – Induction Unit
LAN – Local Area Network
MER – Mechanical Equipment Room
NC – Normally Closed
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HVAC Replacement 230900 - 38 Instrumentation and Control for HVAC NO – Normally Open
OA – Outdoor Air
PID – Proportional Integral Derivative
POT – Portable Operators Terminal
RA – Return Air
RF – Return Fan
RH – Relative Humidity
RTU – Roof-top Unit
SA – Supply Air
SF – Supply Fan
SP – Static Pressure
TEMP – Temperature
UH – Unit Heater
UV – Unit Ventilator
VAV – Variable Air Volume
VFD – Variable Frequency Drive
VRF – Variable Refrigerant Flow
VRV – Variable Refrigerant Volume
WSHP – Water Source Heat Pump
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HVAC Replacement 230934 - 1 Variable-Frequency Motor Controllers SECTION 230934
VARIABLE FREQUENCY MOTOR CONTROLLERS
PART 1 - GENERAL
1.01 DESCRIPTION
A. This specification is to cover a complete Variable Frequency Drive (VFD) consisting of a pulse width modulated (PWM) inverter designed for use with both asynchronous and permanent magnet motors.
B. The drive manufacturer shall supply the drive and all necessary options as specified. All drives installed on this project shall be from the same manufacturer and have a common user interface (control panel). Drives that are manufactured by a third party and “brand labeled” shall not be acceptable.
C. This specification is intended to supplement a drive schedule. The drive schedule identifies the optimized BOM for the project and includes quantity, size, voltage, enclosure rating, options, and harmonic mitigation requirements of the drives. IEEE 519-2014 is an electrical system standard for harmonic mitigation and not intended to be applied to an individual piece of equipment. Drives are only one of many sources of harmonics, thus verification of system IEEE 519-2014 compliance is beyond the VFD manufacturer’s scope. The EOR (Engineer of Record) is responsible for conducting an electrical system study and verifying the drive schedule has specified proper harmonic mitigation for the drives.
1.02 QUALITY ASSURANCE
A. Referenced Standards and Guidelines:
1. Institute of Electrical and Electronic Engineers (IEEE) a. IEEE 519-2014
2. Underwriters Laboratories (as appropriate)
a. UL 508, 508A, 508C, UL 61800, 61800-5-1, 61800-5-2, UL 1995
3. The Association of Electrical Equipment and Medical Imaging Manufacturers (NEMA) a. NEMA ICS 7-2014, Adjustable Speed Drives
4. International Electrotechnical Commission (IEC)
a. EN/IEC 61800
5. National Electric Code (NEC)
a. NEC 430.120, Adjustable-Speed Drive Systems
6. International Building Code (IBC)
a. IBC 2018 Seismic – referencing ASCE 7-16 and ICC AC-156 B. Qualifications:
1. Drives shall be UL labeled as a complete assembly. The base VFD shall be UL listed for 100 kA SCCR when installed in accordance with the manufacturer’s guidelines.
2. The base drive shall be CE and meet EN 61800-3 for the First Environment restricted distribution (Category C2).
3. The base drive shall be seismically certified per 2018 International Building Code (IBC) with a seismic importance factor of 1.5, and minimum 2.5 SDS rating
4. The base drive shall be SEMI-F47 certified. The drive must tolerate voltage sags to 50% for up to 0.2 seconds, sags to 70% for up to 0.5 seconds, and sags to 80% for up to one second.
5. Acceptable Manufacturers
a. ABB ACH Series.
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HVAC Replacement 230934 - 2 Variable-Frequency Motor Controllers b. Alternate manufacturer’s requests shall be submitted in writing to the Engineer for approval at least 20 working days prior to bid. Approval does not relieve the supplier of specification requirements.
1.03 SUBMITTALS
A. Submittals shall include the following information:
1. Outline dimensions, conduit entry locations and weights. Customer connection and power wiring diagrams.
2. OSHPD preapproval, seismic certification, and installation requirements where applicable.
3. Complete technical product description with complete list of options provided. Any portions of this specification not met must be clearly indicated or the supplier and contractor shall be liable to provide all additional components required to meet this specification.
PART 2 - PRODUCTS
2.01 VARIABLE FREQUENCY DRIVES
A. The drive package as specified herein and defined on the drive schedule shall be enclosed in a UL Type enclosure.
B. The drive shall provide full rated output from a line of +10% to -15% of nominal voltage across an ambient temperature range of -15 to 40° C (5 to 104° F).
C. All drives shall utilize the same Advanced Control Panel (keypad) user interface.
1. Plain English text
a. The display shall be in complete English words for programming and fault diagnostics.
b. Safety interlock and run permissive status shall be displayed using predetermined application specific nomenclature, such as: Damper end switch or vibration trip.
Customized terms, such as: AHU-1 End Switch or CT-2 Vibration shall also be available.
2. The control panel shall include at minimum the followings controls:
a. Four navigation keys (Up, Down, Left, Right) and two soft keys. b. Hand-Off-Auto selection, Fault Reset, and manual speed control. c. A Help key shall include assistance for programming and troubleshooting.
3. There shall be a built-in time clock in the control panel with 10-year battery backup.
4. I/O Summary display with a single screen shall indicate and provide:
a. The status/values of all analog inputs, analog outputs, digital inputs, and relay outputs.
b. The function of all analog inputs, analog outputs, digital inputs, and relay outputs. c. The ability to force all inputs and outputs to either a high, low, or specific value.
5. The drive shall automatically backup parameters to the control panel. The drive shall allow two additional unique manual backup parameter sets to be stored.
6. The control panel shall be removable, capable of remote mounting.
7. The drive shall be able to support a Bluetooth Advanced Control Panel. The Bluetooth control panel shall be FCC and QDL (Qualified Design Listing) certified. a. A free app (iOS and Android) shall replicate the control panel on a mobile device or tablet. The control panel’s programming and control functionality shall function on the device. Customizing text, such as AHU-1 End Switch, shall be supported by the device’s keyboard.
b. Bluetooth connectivity shall allow uploading, downloading, and emailing of parameters.
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HVAC Replacement 230934 - 3 Variable-Frequency Motor Controllers c. Bluetooth connectivity shall include two pairing modes: Always discoverable with a fixed passcode, and manual discovery with a unique generated passcode every pairing.
D. All drives shall have the following hardware features/characteristics as standard:
1. Two (2) programmable analog inputs, two (2) programmable analog outputs, six (6) programmable digital inputs, and three (3) programmable Form-C relay outputs.
2. The drive shall include an isolated USB port for interface between the drive and a laptop.
3. An auxiliary power supply rated at 24 VDC, 250 mA shall be included.
4. At a minimum, the drives shall have internal impedance equivalent to 5% to reduce the harmonics to the power line. 5% impedance may be from dual (positive and negative DC link) chokes, or AC line reactor. Drives with only one DC link choke shall add an AC line choke integral to the drive enclosure. Reference the drive schedule to determine if additional harmonic mitigation is required for the system to comply with IEEE 519-2014.
5. The drive shall have variable speed primary cooling fans.
6. The overload rating of the drive shall be 110% of its normal duty current rating for 1 minute every 10 minutes, 130% overload for 2 seconds every minute.
7. The input current rating of the drive shall not be greater than the output current rating.
8. Circuit boards shall be coated per IEC 60721-3-3; Chemical gasses Class 3C2 and Solid particles Class 3S2.
9. Coordinated AC transient surge protection system consisting of 4 MOVs (phase-tophase and phase-to-ground), a capacitor clamp, and internal chokes. The MOVs shall comply with UL 1449 4th Edition.
10. The drive shall include a robust DC bus to provide short term power-loss ride through.
An inertia-based ride through function should help maintain the DC bus voltage during power loss events. Drives with control power ride through only, are not acceptable.
E. All drives shall have the following software features as standard:
1. A Fault Logger that stores the last 16 faults in non-volatile memory. The most recent 5 faults save at least 9 data points, including but not limited to: Time/date, frequency, DC bus voltage, motor current, DI status, temperature, and status words.
2. An Event Logger that stores the last 16 warnings or events that occurred, in nonvolatile memory. Events shall include, but not limited to: Warning messages, checksum mismatch, run permissive open, start interlock open, and automatic reset of a fault.
3. Programmable start methods: Flying-start, Normal-start, and Brake-on-start.
4. Programmable loss-of-load (broken belt / coupling) indication. This function to include a programmable time delay to eliminate false loss-of-load indications.
5. Motor heating function to prevent condensation build up in the motor. Motor heating adjustment, via parameter, shall be in “Watts.”
6. There shall be a run permissive circuit for damper or valve control.
7. Four separate start interlock (safety) inputs shall be provided. The control panel will display the specific safety(s) that are open.
8. The drive shall include a switching frequency control circuit that reduces the switching frequency based on actual drive temperature. It shall be possible to set a minimum and a target switching frequency.
9. The ability to automatically restart after non-critical faults.
10. PID functionality shall be included in the drive.
11. Drive shall be compatible with an accessory that allows the control board to be powered from an external 24 VDC/VAC source.
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HVAC Replacement 230934 - 4 Variable-Frequency Motor Controllers
12. A computer-based software tool shall be available to allow a laptop to program the drive. The drive shall be able to support programming without the need for line voltage. All necessary power shall be sourced via the laptop USB port.
13. The drive shall include a fireman’s override mode.
F. Security Features
1. The drive manufacture shall clearly define cybersecurity capabilities for their products.
2. The drive shall include password protection against parameter changes. There shall be multiple levels of password protection including: End User, Service, Advanced, and Override.
3. A checksum feature shall be used to notify the owner of unauthorized parameter changes made to the drive.
4. The “Hand” and “Off” control panel buttons shall have the option to be individually disabled (via parameter) for drives mounted in public areas.
G. Network Communications
1. The drive shall have an EIA-485 port with removable terminal blocks. The onboard protocols shall be BACnet MS/TP, Modbus, and Johnson Controls N2. Optional communication cards for BACnet/IP and LonWorks shall be available.
2. The drive shall have the ability to communicate via two protocols at the same time, one onboard protocol and one option card based protocol.
3. The drive shall not require a power cycle after communication parameters have been updated.
4. The embedded BACnet connection shall be a MS/TP interface. The drive shall be BTL Listed to Revision 14 or later.
H. Disconnect – A circuit breaker or disconnect switch shall be provided when indicated on the drive schedule. The disconnect shall be door interlocked and padlockable. Drive input fusing shall be included on all packaged units that include a disconnecting means. All disconnect configurations shall be UL Listed by the drive manufacturer as a complete assembly and carry a UL508 label.
PART 3 - EXECUTION
3.01 INSTALLATION
A. The responsible party shall install the drive in accordance with the drive’s installation manual.
B. Installation shall be in accordance with national, state and local building and electrical codes.
3.02 START-UP
A. Start-up shall be provided for each drive by an authorized local service provider.
3.03 PRODUCT SUPPORT
A. Factory trained support personnel shall be locally available at both the specifying and installation locations. A toll free 24/365 technical support line connected to factory support personnel located in the US and Canada shall be available.
B. Training shall include installation, programming and operation of the drive, bypass and network communications. Owner training shall be provided locally upon request.
3.04 WARRANTY
A. The drive Product Warranty shall be 30 months from the date of shipment from the factory.
The warranty shall include: Parts, on-site labor, and travel time and travel costs, or replacement of the complete drive as determined by the drive manufacturer’s technical support.
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HVAC Replacement 230934 - 5 Variable-Frequency Motor Controllers END OF SECTION 230934
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HVAC Replacement 232300 - 1 Refrigerant Piping
SECTION 23 23 00 - REFRIGERANT PIPING
PART 1 - GENERAL
1.1 SUMMARY
A. Section Includes
1. Refrigerant piping used for air-conditioning applications.
1.2 REFERENCES
A. ANSI/ASHRAE 15-2019 - Safety Standard for Refrigeration Systems.
B. ANSI/ASHRAE 34-2019 - Designation and Safety Classification of Refrigerants.
C. ANSI/ASME B16.22-2021 - Wrought Copper and Copper Alloy Solder-Joint Pressure Fittings.
D. ANSI/ASME B31.5-2020 - Refrigeration Piping and Heat Transfer Components.
E. ASTM B32-2020 - Solder Metal.
F. ASTM B280-2016 - Seamless Copper Tube for Air Conditioning and Refrigeration Field Service.
G. ASTM B828-2016 - Making Capillary Joints by Soldering of Copper and Copper-Alloy Tube and Fittings.
H. AWS A5.8/A5.8M-2019 - Filler Metals for Brazing and Braze Welding.
I. ANSI/AHRI 49-1999 (R2008) - Refrigerant Liquid Receivers.
J. AHRI 730-2013 (R2014) – Flow capacity Rating and Application of Suction line Filters and Filter driers.
K. AHRI 750-2007 - Thermostatic Refrigerant Expansion Valves.
L. AHRI 760-2014 - Solenoid Valves for Use with Volatile Refrigerants.
M. UL 429 (Current Ed.) - Electrically Operated Valves.
1.3 SUBMITTALS
A. Product Data: For each type of valve and refrigerant piping specialty indicated. Include Pressure drop based on manufacturer’s test data.
B. Shop Drawings: Show layout of refrigerant piping and specialties, including pipe, tube and fitting sizes, flow capacities, valve arrangements and locations, slopes of horizontal runs, oil traps, double risers, wall and floor penetrations, and equipment connection details. Show interface and spatial relationships between piping and equipment. 334
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1. Refrigerant piping indicated on Drawings is schematic only. Size piping and design actual piping layout, including oil traps, double risers, specialties, and pipe and tube sizes to accommodate, as a minimum, equipment provided, elevation difference between compressor and evaporator, and length of piping to ensure proper operation and compliance with warranties of connected equipment.
C. Field quality-control test reports.
D. Operation and maintenance data.
1.4 QUALITY ASSURANCE
A. Comply with ASHRAE 15, Safety Code for Refrigeration Systems.
B. Comply with ASME B31.5, Refrigeration Piping and Heat Transfer Components.
1.5 PRODUCT STORAGE AND HANDLING
A. Store piping in a clean and protected area with end caps in place to ensure that piping interior and exterior are clean when installed.
PART 2 - PRODUCTS
2.1 COPPER TUBE AND FITTINGS
A. Copper Tube: ASTM B280, Type ACR.
B. Wrought-Copper Fittings: ASME B16.22.
C. Wrought-Copper Unions: ASME B16.22.
D. Solder Filler Metals: ASTM B32. Use 95-5 tin antimony or alloy HB solder to join copper socket fittings on copper pipe.
E. Brazing Filler Metals: AWS A5.8.
F. Flexible Connectors:
1. Body: Tin-bronze bellows with woven, flexible, tinned-bronze-wire-reinforced protective jacket.
2. End Connections: Socket ends.
3. Offset Performance: Capable of minimum 3/4-inch misalignment in minimum 7-inch long assembly.
4. Pressure Rating: Factory test at minimum 500 psig.
5. Maximum Operating Temperature: 250 degrees F.
2.2 VALVES AND SPECIALTIES
A. Diaphragm Packless Valves:
1. Body and Bonnet: Forged brass or cast bronze; globe design with straight-through or angle pattern.
2. Diaphragm: Phosphor bronze and stainless steel with stainless-steel spring.
3. Operator: Rising stem and hand wheel.
4. Seat: Nylon.
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5. End Connections: Socket, union, or flanged.
6. Working Pressure Rating: 500 psig.
7. Maximum Operating Temperature: 275 degrees F.
B. Packed-Angle Valves:
1. Body and Bonnet: Forged brass or cast bronze.
2. Packing: Molded stem, back seating, and replaceable under pressure.
3. Operator: Rising stem.
4. Seat: Nonrotating, self-aligning polytetrafluoroethylene.
5. Seal Cap: Forged-brass or valox hex cap.
6. End Connections: Socket, union, threaded, or flanged.
7. Working Pressure Rating: 500 psig.
8. Maximum Operating Temperature: 275 degrees F.
C. Check Valves:
1. Body: Ductile iron, forged brass, or cast bronze; globe pattern.
2. Bonnet: Bolted ductile iron, forged brass, or cast bronze; or brass hex plug.
3. Piston: Removable polytetrafluoroethylene seat.
4. Closing Spring: Stainless steel.
5. Manual Opening Stem: Seal cap, plated-steel stem, and graphite seal.
6. End Connections: Socket, union, threaded, or flanged.
7. Maximum Opening Pressure: 0.50 psig.
8. Working Pressure Rating: 500 psig.
9. Maximum Operating Temperature: 275 degrees F.
D. Service Valves:
1. Body: Forged brass with brass cap including key end to remove core.
2. Core: Removable ball-type check valve with stainless-steel spring.
3. Seat: Polytetrafluoroethylene.
4. End Connections: Copper spring.
5. Working Pressure Rating: 500 psig.
E. Solenoid Valves: Comply with AHRI 760 and UL 429; listed and labeled by an NRTL.
1. Body and Bonnet: Plated steel.
2. Solenoid Tube, Plunger, Closing Spring, and Seat Orifice: Stainless steel.
3. Seat: Polytetrafluoroethylene.
4. End Connections: Threaded.
5. Electrical: Molded, watertight coil in NEMA 250 enclosure of type required by location with 1/2-inch conduit adapter, and 115-V ac coil.
6. Working Pressure Rating: 400 psig.
7. Maximum Operating Temperature: 240 degrees F.
8. Manual operator.
F. Safety Relief Valves: Comply with ASME Boiler and Pressure Vessel Code; listed and labeled by and NRTL.
1. Body and Bonnet: Ductile iron and steel, with neoprene O-ring seal.
2. Piston, Closing Spring, and Seat Insert: Stainless steel.
3. Seat Disc: Polytetrafluoroethylene.
4. End Connections: Threaded.
5. Working Pressure Rating: 400 psig.
6. Maximum Operating Temperature: 240 degrees F.
G. Thermostatic Expansion Valves: Comply with AHRI 750. 336
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1. Body, Bonnet, and Seal Cap: Forged brass or steel.
2. Diaphragm, Piston, Closing Spring, and Seat Insert: Stainless steel.
3. Packing and Gaskets: Non-asbestos.
4. Capillary and Bulb: Copper tubing filled with refrigerant charge.
5. Suction Temperature: 40 degrees F.
6. Superheat: Nonadjustable.
7. Reverse-flow option (for heat-pump applications).
8. End Connections: Socket, flare, or threaded union.
9. Working Pressure Rating: 450 psig.
H. Straight-Type Strainers:
1. Body: Welded steel with corrosion-resistant coating.
2. Screen: 100-mesh stainless steel.
3. End Connections: Socket or flare.
4. Working Pressure Rating: 500 psig.
5. Maximum Operating Temperature: 275 degrees F.
I. Angle-Type Strainers:
1. Body: Forged brass or cast bronze.
2. Drain Plug: Brass hex plug.
3. Screen: 100-mesh monel.
4. End Connections: Socket or flare.
5. Working Pressure Rating: 500 psig.
6. Maximum Operating Temperature: 275 degrees F.
J. Moisture/Liquid Indicators:
1. Body: Forged brass.
2. Window: Replaceable, clear, fused glass window with indicating element protected by filter screen.
3. Indicator: Color coded to show moisture content in ppm.
4. Minimum Moisture Indicator Sensitivity: Indicate moisture above 60-ppm.
5. End Connections: Socket or flare.
6. Working Pressure Rating: 500 psig.
7. Maximum Operating Temperature: 240 degrees F.
K. Replaceable-Core Filter Dryers: Comply with AHRI 730.
1. Body and Cover: Painted-steel shell with ductile-iron cover, stainless-steel screws, and neoprene gaskets.
2. Filter Media: 10 micron, pleated with integral end rings; stainless-steel support.
3. Desiccant Media: Activated alumina.
4. Designed for reverse flow (for heat-pump applications).
5. End Connections: Socket.
6. Access Ports: NPS 1/4 connections at entering and leaving sides for pressure differential measurements.
7. Maximum Pressure Loss: 2 psig.
8. Rated Flow: 5-tons.
9. Working Pressure Rating: 500 psig.
10. Maximum Operating Temperature: 240 degrees F.
L. Permanent Filter Dryers: Comply with AHRI 730.
1. Body and Cover: Painted-steel shell.
2. Filter Media: 10 micron, pleated with integral end rings; stainless-steel support.
3. Desiccant Media: Activated alumina.
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4. Designed for reverse flow (for heat-pump applications).
5. End Connections: Socket.
6. Access Ports: NPS 1/4 connections at entering and leaving sides for pressure differential measurement.
7. Maximum Pressure Loss: 2 psig.
8. Rated Flow: 5-tons.
9. Working Pressure Rating: 500 psig.
10. Maximum Operating Temperature: 240 degrees F.
M. Liquid Accumulators: Comply with AHRI 495.
1. Body: Welded steel with corrosion-resistant coating.
2. End Connections: Socket or threaded.
3. Working Pressure Rating: 500 psig.
4. Maximum Operating Temperature: 275 degrees F.
2.3 REFRIGERANTS
A. Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to the following:
B. Manufacturers: Subject to compliance with requirements, provide products by one of the following:
1. Arkema Chemicals, Inc.
2. DuPont Company; Fluorochemicals Div.
3. Honeywell, Inc.; Genetron Refrigerants.
4. INEOS Fluor Americas LLC.
C. ASHRAE 34, R-410a: Hydrofluorocarbon (HFC).
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PART 3 - EXECUTION
3.1 PIPING APPLICATIONS
A. Suction Lines NPS 1½ and Smaller for Conventional Air-Conditioning Applications: Copper, Type ACR, annealed-temper tubing and wrought-copper fittings with soldered joints.
B. Suction Lines NPS 4 and Smaller MPS 2 to NPS 4 for Conventional Air-Conditioning Applications: Copper, Type ACR, drawn-temper tubing and wrought-copper fittings with soldered joints.
C. Hot-Gas and Liquid Lines and Suction Lines for Heat-Pump Applications: Copper, Type ACR, annealed-temper tubing and wrought-copper fittings with soldered joints.
D. Hot-Gas and Liquid Lines, and Suction Lines for Heat-Pump Applications: Copper, Type ACR, drawn-temper tubing and wrought-copper fittings with soldered joints.
E. Hot-Gas and Liquid Lines, and Suction Lines for Heat-Pump Applications:
1. NPS 1½ and Smaller: Copper, Type ACR, annealed-temper tubing and wrought-copper fittings with soldered joints.
2. NPS 1½ and Smaller: Copper, Type ACR, drawn-temper tubing and wrought-copper fittings with soldered joints.
3. NPS 2 to NPS 3: Copper, Type K, annealed- or drawn-temper tubing and wroughtcopper fittings with brazed joints.
4. NPS 4: Copper, Type ACR, drawn-temper tubing and wrought-copper fittings with soldered joints.
F. Safety-Relief-Valve Discharge Piping: Copper, Type ACR, drawn-temper tubing and wroughtcopper fittings with soldered joints.
G. Safety-Relief-Valve Discharge Piping:
1. NPS 1½ and Smaller: Copper, Type ACR, annealed-temper tubing and wrought-copper fittings with soldered joints.
2. NPS 1½ and Smaller: Copper, Type ACR, drawn-temper tubing and wrought-copper fittings with brazed joints.
3. NPS 2 to 3: Copper, Type K, annealed- or drawn-temper tubing and wrought-copper fittings with brazed joints.
4. NPS 4: Copper, Type ACR, drawn-temper tubing and wrought-copper fittings with soldered joints.
3.2 VALVE AND SPECIALTY APPLICATIONS
A. Install diaphragm packless valves in suction and discharge lines of compressor.
B. Install service valves for gage taps at strainers if they are not an integral part of strainers.
C. Install a check valve at the compressor discharge and a liquid accumulator at the compressor suction connection.
D. Except as otherwise indicated, install diaphragm packless valves on inlet and outlet side of filter dryers.
E. Install a full-sized, three-valve bypass around filter dryers. 339
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F. Install solenoid valves upstream from each expansion valve. Install solenoid valves in horizontal lines with coil at top.
G. Install thermostatic expansion valves as close as possible to distributors on evaporators.
1. Install valve so diaphragm case is warmer than bulb.
2. Secure bulb to clean, straight, horizontal section of suction line using two bulb straps. Do not mount bulb in a trap or at bottom of the line.
3. If external equalize liners are required, make connection where it will reflect suction line pressure at bulb location.
H. Install safety relief valves where required by ASME Boiler and Pressure Vessel Code. Pipe safety-relief-valve discharge line to outside according to ASHRAE 15.
I. Install moisture/liquid indicators in liquid line at the inlet of the thermostatic expansion valve or at the inlet of the evaporator coil capillary tube.
J. Install strainers upstream from and adjacent to the following unless they are furnished as an integral assembly for device being protected:
1. Solenoid valves.
2. Thermostatic expansion valves.
3. Compressor.
K. Install filter dryers in liquid line between compressor and thermostatic expansion valve, and in the suction line at the compressor.
L. Install flexible connectors at compressors.
3.3 PIPING INSTALLATION
A. Drawing plans, schematics, and diagrams indicate general location and arrangement of piping systems; indicated locations and arrangements were used to size pipe and calculate friction loss, expansion, pump sizing, and other design considerations. Install piping as indicated unless deviations to layout are approved on Shop Drawings.
B. Install Refrigerant piping according to ASHRAE 15.
C. Install piping in concealed locations unless otherwise indicated and except in equipment rooms and service areas.
D. Install piping indicated to be exposed and piping in equipment rooms and service areas at right angles or parallel to buildings walls. Diagonal runs are prohibited unless specifically indicated otherwise.
E. Install piping above accessible ceilings to allow sufficient space for ceiling panel removal.
F. Install piping adjacent to machines to allow service and maintenance.
G. Install piping free of sags and bends.
H. Install fittings for changes in direction and branch connections.
I. Select system components with pressure rating equal to or greater than system operating pressure.
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J. Install piping as short and direct as possible, with a minimum number of joints, elbows, and fittings.
K. Arrange piping to allow inspection and service of refrigeration equipment. Install valves and specialties in accessible locations to allow for service and inspection. Install access doors or panels as specified in Division 8 Section “Access Doors and Frames” if valves or equipment requiring maintenance is concealed behind finished surfaces.
L. Install refrigerant piping in protective conduit where installed below ground.
M. Install refrigerant piping in rigid or flexible conduit in locations where exposed to mechanical injury.
N. Slope refrigerant piping as follows:
1. Install horizontal hot-gas discharge piping with a uniform slope downward away from compressor.
2. Install horizontal suction lines with a uniform slope downward to compressor.
3. Install traps and double risers to entrain oil in vertical runs.
4. Liquid lines may be installed level.
O. When brazing or soldering, remove solenoid-valve coils and sight glasses; also remove valve stems, seats, and packing, and accessible internal parts of refrigerant specialties. Do not apply heat near expansion-valve bulb.
P. Install pipe sleeves at penetrations in exterior walls and floor assemblies.
Q. Seal penetrations through fire and smoke barriers according to Section 07 84 13, Firestopping.
R. Install piping with adequate clearance between pipe and adjacent walls and hangers or between pipes for insulation installation.
S. Install sleeves through floors, walls, or ceilings, sized to permit installation of full-thickness insulation.
T. Seal pipe penetrations through exterior walls according to Section 07 92 00, Joint Protection for materials and methods.
U. Identify refrigerant piping and valves according to Section 23 05 53, Identification for HVAC Piping and Equipment.
3.4 PIPE JOINT CONSTRUCTION
A. Soldered Joints: Construct joints according to ASTM B 828 or CDA’s “Copper Tube Handbook.”
B. Brazed Joints: Construct joints according to AWS’s “Brazing Handbook,” Chapter “Pipe and Tube.”
1. Use Type BcuP, copper-phosphorus alloy for joining copper socket fittings with copper pipe.
2. Use Type BAg, cadmium-free silver alloy for joining copper with bronze or steel. 341
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3.5 HANGERS AND SUPPORTS
A. Hanger, support, and anchor products are specified in Section 23 05 29, Hangers and Supports for HVAC Piping and Equipment.
B. Install the following pipe attachments:
1. Adjustable steel clevis hangers for individual horizontal runs less than 20-feet long.
2. Roller hangers and spring hangers for individual runs 20-feet or longer.
3. Pipe Roller: MSS SP-58, Type 44 for multiple horizontal piping 20-feet or longer, supported on a trapeze.
4. Spring hangers to support vertical runs.
5. Copper-clad hangers and supports for hangers and supports in direct contact with copper pipe.
C. Install hangers for copper tubing with the following maximum spacing and minimum rod sizes:
1. NPS 1/2: Maximum span, 60-inches; minimum rod size, 1/4-inch.
2. NPS 5/8: Maximum span, 60-inches; minimum rod size, 1/4-inch.
3. NPS 1: Maximum span, 72-inches; minimum rod size, 1/4-inch.
4. NPS 1-1/4: Maximum span, 96-inches, minimum rod size, 3/8-inch.
5. NPS 1-1/2: Maximum span, 96-inches, minimum rod size, 3/8-inch.
6. NPS 2: Maximum span, 96-inches; minimum rod size, 3/8-inch.
7. NPS 2-1/2: Maximum span, 108-inches; minimum rod size, 3/8-inch.
8. NPS 3: Maximum span, 10-feet; minimum rod size, 3/8-inch.
9. NPS 4: Maximum span, 12-feet; minimum rod size, 1/2-inch.
10. Support multifloor vertical runs at least at each floor.
3.6 FIELD QUALITY CONTROL
A. Perform tests and inspections and prepare test reports.
B. Tests and Inspections:
1. Comply with ASME B31.5, Chapter VI.
2. Test refrigerant piping and specialties. Isolate compressor, condenser, evaporator, and safety devices from test pressure if they are not rated above the test pressure.
3. Line Test Pressure for Refrigerant 410a:
a. Suction Lines for Air-Conditioning Applications: 118 psig. b. Suction Lines for Heat-Pump Applications: 400 psig.
c. Hot-Gas and Liquid Lines: 400 psig.
4. Test high- and low-pressure side piping of each system separately at not less than the pressures indicated in No. 3 above.
a. Fill system with nitrogen to the required test pressure. b. System shall maintain test pressure at the manifold gage throughout duration of test.
c. Test joints and fittings with electronic leak detector or by brushing a small amount of soap and glycerin solution over joints.
d. Remake leaking joints using new materials, and retest until satisfactory results are achieved.
3.7 SYSTEM CHARGING
A. Charge system using the following procedures:
1. Install core in filter dryers after leak test but before evacuation. 342
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2. Evacuate entire refrigerant system with a vacuum pump to 500 micrometers. If vacuum holds for 12 hours, system is ready for charging.
3. Break vacuum with refrigerant gas, allowing pressure to build up to 2 psig.
4. Charge system with a new filter-dryer core in charging line.
3.8 ADJUSTING
A. Adjust thermostatic expansion valve to obtain proper evaporator superheat.
B. Adjust high- and low-pressure switch settings to avoid short cycling in response to fluctuating suction pressure.
C. Adjust set-point temperature of air-conditioning or chilled-water controllers to the system design temperature.
D. Perform the following adjustments before operating the refrigeration system, according to manufacturer’s written instructions:
1. Open shutoff valves in condenser water circuit.
2. Verify that compressor oil level is correct.
3. Open compressor suction and discharge valves.
4. Open refrigerant valves except bypass valves that are used for other purposes.
5. Check open compressor-motor alignment and verify lubrication for motors and Bearings.
E. Replace core of replaceable filter dryer after system has been adjusted and after design flow rates and pressures are established.
END OF SECTION 23 23 00
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HVAC Replacement 237413 - 1 Air Handling Units
SECTION 237413
AIR HANDLING UNITS
PART 1 - GENERAL
1.01 SECTION INCLUDES
Design, performance criteria, controls, and installation requirements for Custom Air Handling Units.
1.02 REFERENCES
A. AMCA Standard 99: Standards Handbook
B. AMCA /ANSI Standard 204: Balance Quality and Vibration Levels for Fans C. AMCA Standard 210: Laboratory Methods of Testing Fans for Ratings D. AMCA Standard 300: Reverberant Room Method for Sound Testing of Fans E. AMCA Standard 500:Test Methods for Louvers, Dampers and Shutters F. AHRI Standard 410: Forced-Circulation Air-Cooling and Air-Heating Coil G. ASHRAE Standard 52: Gravimetric and Dust Spot Procedures for Testing Air Cleaning Devices Used in General Ventilation for Removing Particulate Matter H. ASHRAE/ANSI Standard 111: Practices for Measurement, Testing, Adjusting and Balancing of Building Heating, Ventilation, Air-Conditioning and Refrigeration Systems I. UL Standard 1995: Heating and Cooling Equipment
J. ASTM A-525: Specification for General Requirements for Steel Sheet, Zinc-Coated (Galvanized) by the Hot-Dip Process
1.03 SUBMITTALS
A. Submit shop drawings and product data in accordance with Division 1.
B. Submittals shall include the following:
1. Dimensioned plan and elevation view drawings, including motor starter and control cabinets, required clearances, and location of all field connections.
2. Summary of all auxiliary utility requirements such as: electricity, water, compressed air, etc. Summary shall indicate quality and quantity of each required utility.
3. Ladder type schematic drawing of the power and ancillary utility field hookup requirements, indicating all items that are furnished.
4. Manufacturer’s performance of each unit. Selection shall indicate, as a minimum, the following:
a. Input data used for selection.
b. Model number of the unit.
c. Net capacity.
d. Rated load amp draw.
e. Noise levels produced by equipment.
f. Fan curves.
g. Approximate unit shipping weight.
1.04 OPERATION AND MAINTENANCE DATA
A. Include data on design, inspection and procedures related to preventative maintenance. Operation and Maintenance manuals shall be submitted at the time of unit shipment.
1.05 QUALIFICATIONS
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A. Manufacturer shall be a company specializing in the design and manufacture of commercial / industrial custom HVAC equipment. Manufacturer shall have been in production of custom HVAC equipment for a minimum of 5 years.
B. Each unit shall bear an ETL or UL label under UL Standard 1995 indicating the complete unit is listed as an assembly. ETL or UL listing of individual components, or control panels only, is not acceptable.
1.06 DELIVERY, STORAGE, AND HANDLING
A. Deliver, store, protect and handle products to site under the supervision of the owner.
1.07 SEQUENCING AND SCHEDULING
A. Coordinate work performed under this section with work performed under the separate installation contract.
1.08 WARRANTY
A. The complete unit shall be covered by a parts warranty issued by the manufacturer covering the first year of operation. This warranty period shall start upon receipt of start-up forms for the unit or eighteen months after the date of shipment, whichever occurs first.
B. The installing contractor shall provide labor warranty during the unit’s first year of operation.
PART TWO: PRODUCTS
2.01 ACCEPTABLE MANUFACTURERS
A. Provide custom outdoor air handling units as manufactured by Temtrol as the basis-of-design.
Equipment manufactured by Ventrol, Mammoth, or Huntair shall be considered provided the construction specifications capacities and performance criteria are met.
B. Alternate manufacturers must match exact curb dimensions, mounting platforms, electrical data, and heating / cooling capacities. Manufactures who will be considered if conditions above are met:
1. AnnexAir
2. Alliance
3. Other manufacturers must be pre-approved by City of West Sacramento and Consuting Engineer 3 weeks prior to bid date.
2.02 GENERAL
A. Furnish and install where shown on the plans, mechanical frame style air handling units with outdoor construction features as specified below. The units shall be provided and installed in strict accordance with the specifications. All units shall be complete with all components and accessories as specified. Any exceptions must be clearly defined. The contractor shall be responsible for any additional expenses that may occur due to any exception made.
2.03 Factory Testing and Quality Control
A. Standard Factory Tests: The fans shall be factory run tested to ensure structural integrity and proper RPM. All electrical circuits shall be tested to ensure correct operation before shipment of unit. Units shall pass quality control and be thoroughly cleaned prior to shipment.
2.04 UNIT CONSTRUCTION DESCRIPTION
A. General: Provide factory-fabricated air handling units with capacity as indicated on the schedule.
Units shall have overall dimensions as indicated and fit into the space available with adequate clearance for service as determined by the Engineer. Units shall be completely assembled. Multiple sectioned units shall be shipped as a single factory assembled piece (except where shipping 345
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limitations prevent) de-mounted into modular sections in the field by the contractor. Units shall be furnished with sufficient gasket and bolts for reassembly in the field by the contractor. Unit manufacturer shall provide certified ratings conforming to the latest edition of AMCA 210, 310, 500 and AHRI 410. All electrical components and assemblies shall comply with NEMA standards. Unit internal insulation must have a flame spread rating not over 25 and smoke developed rating no higher than 50 complying with NFPA 90A, “Standard for the Installation of Air Conditioning and Ventilating Systems.” Units shall comply with NFPA 70, “National Electrical Code,” as applicable for installation and electrical connections of ancillary electrical components of air handling units.
Tags and decals to aid in service or indicate caution areas shall be provided. Electrical wiring diagrams shall be attached to the control panel access doors. Operation and maintenance manuals shall be furnished with each unit. Units shall be UL or ETL listed.
B. Rigging Provision – Multiple Piece Units: Units shipped in multiple sections shall be engineered for field assembly. The base frame shall have integral lifting lugs. The lifting lugs shall be fabricated from structural steel with an appropriate rigging hole. Lifting lugs shall be located at the corner of each section (and along the sides if required) and sized to allow rigging and handling of the unit.
All gasket and necessary assembly hardware shall ship loose with unit. Junction boxes with a factory supplied numbered terminal strip shall be supplied at each shipping split for reconnection of control wiring.
C. Unit Base - Floor: Unit perimeter base rail shall be fabricated using heavy gauge steel. CChannel cross supports shall be welded to perimeter base steel and located on maximum 24” centers to provide support for internal components. Base rails shall include lifting lugs at the corner of the unit or each section if de-mounted. Internal walk-on floor shall be 16 Ga Galvanized. The outer sub-floor of the unit shall be made from 20 Ga Galvanized. The floor cavity shall be spray foam insulated with floor seams gasketed for thermal break and sealed for airtight / watertight construction. Where access is provided to the unit interior, floor openings shall be covered with walk on phenolic coated steel safety grating. Single wall floors with glued and pined insulation and no sub floor are not acceptable. Base frame shall be attached to the unit at the factory.
D. Unit Casing – The construction of the air handling unit shall consist of a (1” x 2”) steel frame with formed 16 gauge galvanized steel exterior casing panels. The exterior casing panels shall be attached to the gasketed (1 x 2) steel frame with corrosion resistant fasteners. All casing panels shall be completely removable from the unit exterior without affecting the unit’s structural integrity. (Units without framed type of construction shall be considered, provided the exterior casing panels are made from 16 gauge galvanized steel, maximum panel center lines are less than 20 inches and deflection is less than L/200 @ 8” positive pressure). The air handling unit casing shall be of the “no-through-metal” design. The casing shall incorporate insulating thermal breaks as required so that, when fully assembled, there’s no path of continuous unbroken metal to metal conduction from inner to outer surfaces. All panel seams shall be caulked and sealed for an airtight unit.
E. The exterior panel finish shall be: Painted with a polyester resin coating designed for long term corrosion resistance meeting or exceeding (ASTM B-117) Salt Spray Resistance at 95 degrees F. 2,500 hrs. and (ASTM D-2247) Humidity Resistance at 95 degrees F. 2,500 hrs. The color shall be sandstone.
Note: If manufacturer cannot provide thermal break (no through metal) and or removable exterior panel construction it must be noted as an exception on the bid.
F. Double Wall Liner - Each unit shall have double wall construction with 20 gauge solid galvanized liner in the entire unit. The double wall interior panel shall be removable from the outside if the unit without affecting the structural integrity of the unit.
G. Insulation - Entire unit to be insulated with a full 2” (R8.4) thick non-compressed fiberglass insulation. The insulation shall have an effective thermal conductivity (C) of .24 (BTU in. /sq. ft. F°) and a noise reduction coefficient (NRC) of 0.70 / per inch thick (based on a type "A" mounting).
The coefficients shall meet or exceed a 3.0 P.C.F. density material rating. Insulation shall meet the erosion requirements of UL 181 facing the air stream and fire hazard classification of 25/50 (per ASTM-84 and UL 723 and CAN/ULC S102-M88) and meet NFPA 90A and 90B. All insulation edges shall be encapsulated within the panel. All perforated sections shall have Micromat® or equal 346
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insulation with non-woven mat facing, 5000 fpm rating and non-hygroscopic fibers as manufactured by Johns Manville or approved equal.
H. Access Doors - The unit shall be equipped with a solid double wall insulated (same as the unit casing), hinged access doors as shown on the plans. The doorframe shall be extruded aluminum, foam filled with a built in thermal break barrier and full perimeter gasket. The door hinge assembly shall be stainless steel. There shall be a minimum of two heavy duty handles per door. Provide ETL, UL 1995, and CAL-OSHA approved tool operated safety latch on all fan section access doors.
Note: If manufacturer cannot provide thermal break door design it must be noted as an exception on the bid.
2.05 UNIT COMPONENT DESCRIPTION
A. FANWALL TECHNOLOGYTM (FWT)
1. The multiple fan array systems shall include multiple, direct driven, arrangement 4 plenum fans constructed per AMCA requirements for the duty specified class III as required. Class I fans are not acceptable.
a. Fans shall be rated in accordance with and certified by AMCA for performance. All fans shall be selected to deliver the specified airflow quantity at the specified operating Total Static Pressure and specified fan/motor speed. The fan array shall be selected to operate at a system Total Static Pressure that does not exceed 90% of the specified fan’s peak static pressure producing capability at the specified fan/motor speed. i) Each fan/motor cube or cell shall include a minimum 10 gauge, G 90 Galvanized steel intake wall, .100 aluminum spun fan inlet funnel, and an 10 gauge G90 Galvanized steel motor support plate rail and structure. All motors shall be standard foot mounted type TEAO selected at the specified operating voltage, RPM, and efficiency as specified or as scheduled elsewhere. Motors shall meet the requirements of NEMA MG-1 Part 30 and 31, section 4.4.2. Motors shall be as manufactured by Baldor, Siemens, or Toshiba for use in multiple fan arrays that operate at varying synchronous speeds as driven by an approved VFD. Motor HP shall not exceed the scheduled HP as indicated in the AHU equipment schedule(s).
Steel cased motors and/or ODP motors are not acceptable. ii) All motors shall include permanently sealed (L10-500,000 hr) bearings and shaft grounding to protect the motor bearings from electrical discharge machining due to stray shaft currents. Each fan/motor assembly shall be dynamically balanced to meet AMCA standard 204-96, exceeding category BV-5, to meet or exceed an equivalent Grade G.55, producing a maximum rotational imbalance of .022” per second peak, filter in ( .55mm per second peak, filter in). Fan and motor assemblies submitted for approval incorporating larger than 22” wheel size and 215 T frames size motors shall be balanced in three orthogonal planes to demonstrate compliance with the G.55 requirement with a maximum rotational imbalance of .022” per second peak filter in ( .55 mm per second peak, filter in). Copies of the certified balancing reports shall be provided with the unit O&M manuals at the time of shipment. Submittals that do not include a statement of compliance with this requirement will be returned to the contractor without review.
2. The multiple fan array AHU unit shall provide the specified acoustical performance as scheduled for the unit supply discharge opening(s), RA opening(s), and the OSA and Exhaust air opening(s).
a. Listed or alternate manufacturers, other than the basis of design, providing multiple fan arrays that incorporate fans which are not manufactured by the AHU manufacturer, must provide modeled acoustical performance of the AHU unit for pre-bid approval by the engineer 10 working days before the project bid date. Submitted sound and performance 347
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data for preapproval showing only single fan performance for multiple fan arrays will be returned without review.
3. The fan array shall consist of multiple fan and motor ”cubes” or “cells”, spaced in the air way tunnel cross section to provide a uniform air flow and velocity profile across the entire air way tunnel cross section and components contained therein. In order to assure uniform velocity profile in the AHU cross section, the fan cube dimensions must be variable, such that each fan rests in an identically sized cube or cell, and in a spacing that must be such that the submitted array dimensions fill a minimum of 90% of the cross sectional area of the AHU air way tunnel.
a. There shall be no blank off plates or “spacers” between adjacent fan columns or rows to position the fans across the air way tunnel. The array shall produce a uniform air flow profile and velocity profile within the airway tunnel of the air handling unit to equal the specified cooling coil and/or filter bank face velocity by +/- 10% when measured at a point 36” from the intake side of the fan array intake plenum wall, and at a distance of 72” from the discharge side of the fan array intake plenum wall. b. Submittals for units providing less than the scheduled quantity of fans and/or spacing of the fans for multiple fan arrays shall submit CFD modeling of the air flow profile for prebid approval that indicates uniform velocity and flow across all internal components without increasing the length of the AHU unit or changing the aspect ratio of the unit casing as designed.
4. Each individual cube or cell in the multiple fan arrays shall be provided with an integral back flow prevention device that prohibits recirculation of air in the event a fan or multiple fans become disabled.
a. The system effects for the back flow prevention device(s) shall be included in the criteria for TSP determination for fan selection purposes, and shall be indicated as a separate line item SP loss in the submittals. Submitted AHU performance that does not indicate allowance for system effects for the back flow prevention device(s) and the system effect for the fan and motor enclosure in which each fan is mounted , will be returned to the contractor disapproved and will need to be resubmitted with all of the requested information included for approval. Back Draft Damper performance data that is per AMCA ducted inlet and discharge arrangements will not be accepted. b. Damper data must be for the specific purpose of preventing back flow in any disabled fan cube and that is mounted directly at the inlet of each fan. Motorized dampers for this purpose are not acceptable. Submitted fan performance data which only reflect published performance for individual fans in AMCA arrangement “A” free inlet and discharge will not be accepted. AHU Manufacturers that do not manufacture the fans being submitted on must provide certified performance data for fans as installed in the AHU unit with Back Draft damper effects included. At the sole discretion of the engineer, such performance testing may be witnessed by the engineer and/or the owner’s representative.
5. Each fan motor shall be individually wired to a control panel containing a single VFD as the primary VFD. Each VFD shall be sized for the total connected HP for all fan motors contained in the fan array.
a. Wire sizing shall be determined, and installed, in accordance with applicable NEC standards and local code requirements.
6. At the sole discretion of the engineer, AHU manufacturers that are approved for bidding purposes only, other than the basis of design manufacturer, and that are submitting multiple fan arrays, shall test one or more of the submitted AHU’s for flow, pressure, leakage, BHP and acoustics as submitted and approved, prior to shipment. The testing shall be witnessed by an owner’s representative and approved by the engineer prior to shipment of any of the submitted AHU equipment. A test report shall be provided for each tested AHU unit and the report shall be included in the O&M manuals for the units. 348
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7. Each fan & motor assembly shall be removable through a 24” wide, free area, access door located on the discharge side of the fan wall array without removing the fan wheel from the motor. All fan/motor access doors shall open against pressure.
8. MOTOR CIRCUIT PROTECTION:
a. All motors in the FANWALL Array shall be provided with individual Motor Protection for thermal overload protection. All motor circuit protectors can be located in starting device enclosure. Motor circuit protector enclosure must be located and mounted at a minimal distance from motors in the FANWALL Array. Provide remote indication by means of aux contacts wired in series.
i) (Option) Remote indication:
Current Sensors wired in series
ii) (Option) Pilot Lights:
iii) Single cover mounted pilot light for local monitoring iv) Multiple (one per fan) cover mounted pilot lights for local monitoring
9. FANWALL TECHNOLOGYTM (FWT) CONTROL:
a. FANWALL TECHNOLOGYTM (FWT) WITH VARIABLE FREQUENCY DRIVE CONTROL:
b. As required by system design, provide a single ABB ACH580 Variable Frequency Drive to start and run all motors in the FANWALL Array. The Variable Frequency Drive shall be sized accordingly to start and hold all motors in the Fan Wall. Provide service disconnect with fuses or circuit breaker.
c. FLOW MONITORING SYSTEM:
i) As required by system design, each fan assembly shall be equipped with airflow monitoring probes, Huntair Flow-Cone. The flow measuring system shall consist of a flow measuring station with two static pressure taps and two total pressure tubes located at the throat of the fan inlet cone. The flow measuring station shall not obstruct the inlet of the fan and shall have no effect on fan performance (flow or static) or sound power levels. A surface mounted indicator shall provide a:
ii) Option #1:
iii) Output control signal transmitter (4-20mA) (0-10 volt) for use in BAS as specified elsewhere
iv) Option #2:
v) Digital CFM readout (Mounted on unit exterior)
B. Heat Transfer Coils – Direct expansion coils
1. Direct expansion coils shall be constructed of seamless copper tubing mechanically expanded into fin collars. All fins shall be continuous within the coil casing to eliminate carryover inherent with a split fin design. Fins shall be die formed plate type. Headers are seamless copper with die formed tube holes. Connections shall be O.D. sweat copper and includes a refrigerant distributor.
2. Daikin VRV AHU Integration Kits to be field mounted and piped to the DX coils within the AHUs.
a. Daikin EKEXV Refrigeration Valve kit to be mounted on AHU exterior casing. i. Refrigerant piping from Daikin Condenser to EKEXV valves to be field piped.
ii. Refrigerant piping from Daikin EKEXV valves to the DX factory mounted coils to be field piped.
b. Daikin EKEQM Control box to be field mounted on the exterior of the AHU casing. i. Field Power and controls by others to be connected for integration. 349
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3. Direct expansion coils shall have the following construction:
Standard 3/8":
( ) 1/2" o.d. x .017" wall copper tube with .025 return bends ( ) .006" aluminum fins
( ) 16 gauge galvanized steel casing
C. Condensate / Drain Pans - IAQ style drain pans shall be provided under all cooling coils as shown on the drawings. The drain pan shall be fabricated from 16 gauge 304 stainless steel.
1. All pans are to be triple pitched for complete drainage with no standing water in the unit.
They shall be insulated minimum 3-inch "Double Bottom" construction with welded corners.
Provide stainless steel, 1-1/4” MPT drain connection extended to the exterior of the unit base rail. Units in excess of 159 inches shall have drain connections on both sides. All drain connections shall be piped and trapped separately for proper drainage.
D. Filters - Provide filters of the type indicated on the schedule. Factory fabricated filter sections shall be of the same construction and finish as the unit. Face loaded pre and final filters shall have Type 8 frames as manufactured by AAF, FARR or equal. Side service filter sections shall include hinged access doors on both sides of the unit. Internal blank-offs shall be provided by the air unit manufacturer as required to prevent air bypass around the filters. The filters shall be as manufactured by Farr, Purolator, AAF or equal. Filters shall be in compliance with ANSI/UL 900 – Test Performance of Air Filters.
1. Filter Gauge: Each Filter bank shall be furnished with:
a. Magnehelic filter gauge with a 4 ¾” OD white static pressure dial with black figures and zero pointer adjustment. / Dwyer Series 2000 Air filter gauge Dwyer Mark 25 Inclined manometer (DWYER 250 AF).
2. Flat Racks - Filter racks shall be completely factory assembled and designed for industrial applications. Filter racks shall be fabricated from no less than 16 gauge galvanized steel.
Filter racks shall be applied in low efficiency filter applications and will be either upstream or side accessible. Side accessible filter racks shall have an oversized access door on the exterior of the air handler, centered on the filter rack for easy filter removal. Upstream access filter racks shall have one central access cover per row of filters centered in the unit for easy access. Filter racks over 72" in length shall require an angle center reinforcement support. Filter racks shall be designed for a maximum of 500 fpm, or meet or exceed the area specified in the mechanical schedule.
E. Dampers – Ruskin CD-60 or approved equal. Provide Class 1 rated, ultra low leak dampers (less than 3 cfm/sq ft. @ 1” w.g.) as indicated on the unit drawings. Low leakage dampers shall have extruded aluminum airfoil blades. Flat or formed metal blades are not acceptable. The damper blade shall incorporate santoprene rubber edge seals and zinc plated or stainless steel tubular steel shaft for a non-slip operation. Shaft bearings shall be spherical – non corrosive nylon to eliminate friction and any metal to metal contact. Damper jamb seals shall be UV rated, nylon glass reinforced or stainless steel spring arcs designed for a minimum air leakage and smooth operation.
Damper linkage shall be concealed within a 16 gauge galvanized steel frame.
F. AIR MONITORING STATION: As required by the project schedules.
1. The air monitoring station shall combines the functions of control damper or louver and flow measurement station in one assembly. Air straightener manufactured of 3000 series aluminum alloy honeycomb contained in 5" long 16 gauge galvanized sleeve attached to monitoring blade frame.. Fixed anodized aluminum monitoring blades are mounted in 10" 16 gauge galvanized frame. Control dampers feature airfoil shaped 6063T5 heavy gauge extruded aluminum blades rotating on 1/2" plated steel hex axles, mounted in a 4"x 1" 6063T5, .081" thickness extruded aluminum channel with mounting flanges on both sides of frame. Jamb seals are flexible metal compression type. Blade seals are Ruskiprene seals along control damper blade edges. Bearings are molded synthetic. Linkage is galvanized steel, concealed in the frame.
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2. The acceptable range of operation is 300- fpm to 2000- fpm face velocity.
3. The air monitoring station shall be tested to AMCA Standard 611-95 and qualified to bear the AMCA Ratings Seal for Airflow Measurement performance. Ruskin AMS50 or AML3 is the basis of design.
G. Rain Hoods - Rain hoods shall be fabricated from same material as unit casing with 1/4" wire mesh inlet screen. Hoods sized to minimize moisture carry over.
H. Louvers:
1. Exhaust Air applications - Provide extruded aluminum stationary louvers, drainable type with built in downspouts and birdscreen. Blades shall be housed inside a 16 ga. galvanized steel frame mounted to the unit exterior. Louver finish to match exterior unit finish.
2. Outside Air applications - RUSKIN AML3 Airflow Measuring Louvers shall be used at O/A location. Louvers shall be stationary, drainable type with built in downspouts and furnished with birdscreen. Blades shall be vertical and housed inside an aluminum frame mounted to the unit exterior. Louver finish to match exterior unit finish.
2.06 ELECTRICAL POWER AND CONTROLS
A. All electrical and automatic control devices not previously called out or listed below are to be furnished and installed in the field by OTHERS.
B. All wiring shall be (75°C) Insulated copper wires.
C. The unit shall feature a mounted permanent nameplate displaying at a minimum the manufacturer, serial number, model number and current and amps voltage. The unit must have an ETL or UL Listing and bear the appropriate mark.
D. Conduit shall consist of a combination of EMT or flexible metal conduit as required. Liquidtite flexible metal conduit may be used outside the air tunnel for wet locations.
E. Unit Convenience Features
1. Each section (specified sections) shall be equipped with a vapor- proof 100 watt service light with guard.
a. Lights shall be controlled by one light switch mounted adjacent to the supply air fan access door.
2. Furnish a 120 volt GFI duplex convenience outlet on the exterior of the unit as indicated on the unit drawing.
3. All lights, switches and outlets shall be wired to a fused or non-fused disconnect for a separate 120 volt external source provided by others.
End of Section 237413
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HVAC Replacement 237416 - 1 Packaged Rooftop Air Conditioning Units SECTION 237416
PACKAGED ROOFTOP AIR CONDITIONING UNITS
PART 1: GENERAL
1.01 SECTION INCLUDES
A. Packaged Rooftop air conditioners
1.02 REFERENCES
A. AFBMA 9 - Load Ratings and Fatigue Life for Ball Bearings.
B. AMCA 99—Standards Handbook
C. AMCA 210—Laboratory Methods of Testing Fans for Rating Purposes D. AMCA 500—Test Methods for Louver, Dampers, and Shutters.
E. AHRI 340/360 - Unitary Large Equipment
F. NEMA MG1—Motors and Generators
G. National Electrical Code.
H. NFPA 70—National Fire Protection Agency.
I. SMACNA—HVAC Duct Construction Standards—Metal and Flexible.
J. UL 900—Test Performance of Air Filter Units.
1.03 SUBMITTALS
A. Shop Drawings: Indicate assembly, unit dimensions, weight loading, required clearances, construction details, field connection details, electrical characteristics and connection requirements.
B. Product Data:
1. Provide literature that indicates dimensions, weights, capacities, ratings, fan performance, and electrical characteristics and connection requirements.
2. Provide computer generated fan curves with specified operating point clearly plotted.
3. Manufacturer’s Installation Instructions.
1.04 OPERATION AND MAINTENANCE DATA
A. Maintenance Data: Provide instructions for installation, maintenance and service
1.05 QUALIFICATIONS
A. Manufacturer: Company specializing in manufacturing the Products specified in this section with minimum five years documented experience, who issues complete catalog data on total product.
B. Startup must be done by trained personnel experienced with rooftop equipment.
C. Do not operate units for any purpose, temporary or permanent, until ductwork is clean, filters and remote controls are in place, bearings lubricated, and manufacturers’ installation instructions have been followed.
1.06 DELIVERY, STORAGE, AND HANDLING
A. Deliver, store, protect and handle products to site.
B. Accept products on site and inspect for damage.
C. Store in clean dry place and protect from weather and construction traffic. Handle carefully to avoid damage to components, enclosures, and finish.
PART 2: PRODUCTS
2.01 MANUFACTURERS
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2.02 GENERAL DESCRIPTION
A. Furnish as shown on plans, Daikin Applied Rebel Single zone Heating and Cooling Unit(s) model DPS. Unit performance and electrical characteristics shall be per the job schedule.
B. Configuration: Fabricate as detailed on prints and drawings:
1. Return plenum / economizer section
2. Filter section
3. Cooling coil section
4. Supply fan section
5. Condensing unit section
C. The complete unit shall be cETLus listed.
D. The unit shall be ASHRAE 90.1-2016 compliant and labeled.
E. Each unit shall be specifically designed for outdoor rooftop application and include a weatherproof cabinet. Each unit shall be completely factory assembled and shipped in one piece. Packaged units shall be shipped fully charged with R-410 Refrigerant and oil.
F. The unit shall undergo a complete factory run test prior to shipment. The factory test shall include a refrigeration circuit run test, a unit control system operations checkout, a unit refrigerant leak test and a final unit inspection.
G. All units shall have decals and tags to indicate caution areas and aid unit service. Unit nameplates shall be fixed to the main control panel door. Electrical wiring diagrams shall be attached to the control panels. Installation, operating and maintenance bulletins and start-up forms shall be supplied with each unit.
H. Performance: All scheduled EER, IEER, capacities and face areas are minimum accepted values.
All scheduled amps, kW, and HP are maximum accepted values that allow scheduled capacity to be met.
I. Warranty: The manufacturer shall provide 12-month parts only warranty. Defective parts shall be repaired or replaced during the warranty period at no charge. The warranty period shall commence at startup or six months after shipment, whichever occurs first.
2.03 CABINET, CASING, AND FRAME
A. Panel construction shall be double-wall construction for all panels. All floor panels shall have a solid galvanized steel inner liner on the air stream side of the unit to protect insulation during service and maintenance. Insulation shall be a minimum of 1" thick with an R-value of 7.0, and shall be 2 part injected foam. Panel design shall include no exposed insulation edges. Unit cabinet shall be designed to operate at total static pressures up to 5.0 inches w.g.
B. Exterior surfaces shall be constructed of painted galvanized steel, for aesthetics and long-term durability. Paint finish will include a base primer with a high-quality polyester resin topcoat. Finished, unabraded panel surfaces shall be exposed to an ASTM B117 salt spray environment and exhibit no visible red rust at a minimum of 3,000 hours exposure. Finished, abraded surfaces shall be tested per ASTM D1654, having a mean scribe creepage not exceeding 1/16” at 1,000 hours minimum exposure to an ASTM B117 salt spray environment. Measurements of results shall be quantified using ASTM D1654 in conjunction with ASTM D610 and ASTM D714 to evaluate blister and rust ratings.
C. Service doors shall be provided on the fan section, filter section, control panel section, and heating vestibule in order to provide user access to unit components. All service access doors shall be mounted on multiple, stainless steel hinges and shall be secured by a latch system. Removable service panels secured by multiple mechanical fasteners are not acceptable. 353
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HVAC Replacement 237416 - 3 Packaged Rooftop Air Conditioning Units D. The unit base shall overhang the roof curb for positive water runoff and shall seat on the roof curb gasket to provide a positive, weathertight seal. Lifting brackets shall be provided on the unit base to accept cable or chain hooks for rigging the equipment.
2.04 OUTDOOR/RETURN AIR SECTION
A. Unit shall be provided with an outdoor air economizer section. The economizer section shall include outdoor, return, and exhaust air dampers. The economizer operation shall be fully integral to the mechanical cooling and allow up to 100% of mechanical cooling if needed to maintain the cooling discharge air temperature. The outdoor air hood shall be factory installed and constructed from galvanized steel finished with the same durable paint finish as the main unit. The hood shall include moisture eliminator filters to drain water away from the entering air stream. The outside and return air dampers shall be sized to handle 100% of the supply air volume. The dampers shall be parallel blade design. Damper blades shall be gasketed with side seals to provide an air leakage rate of 1.5 cfm / square foot of damper area at 1” differential pressure in according with testing defined in AMCA 500.
A barometric exhaust damper shall be provided to exhaust air out of the back of the unit. A bird screen shall be provided to prevent infiltration of rain and foreign materials. Exhaust damper blades shall be lined with vinyl gasketing on contact edges. Control of the dampers shall be by a factory installed direct coupled actuator. Damper actuator shall be of the modulating, spring return type. A comparative enthalpy control shall be provided to sense and compare enthalpy in both the outdoor and return air streams to determine if outdoor air is suitable for “free” cooling. If outdoor air is suitable for “free” cooling, the outdoor air dampers shall modulate in response to the unit’s temperature control system.
B. Economizer assembly Fault Detection and Diagnostics (FDD) shall be 90.1, IECC, and California Title 24 compliant. MicroTech III controls shall display a warning, and write a warning to the BAS, if the economizer malfunctions in accordance with 90.1, IECC, and Title 24 specifications.
2.05 FILTERS
A. Unit shall be provided with a draw-through filter section. The filter rack shall be designed to accept a 2” prefilter and a 4” final filter. The unit design shall have a hinged access door for the filter section.
The manufacturer shall ship the rooftop unit with 2” MERV 8 construction filters. The contractor shall furnish and install, at building occupancy, the final set of filters per the contract documents.
2.06 COOLING COIL
A. The indoor coil section shall be installed in a draw through configuration, upstream of the supply air fan. The coil section shall be complete with a factory piped cooling coil and an ASHRAE 62.1 compliant double sloped drain pan.
B. The direct expansion (DX) cooling coils shall be fabricated of seamless high efficiency copper tubing that is mechanically expanded into high efficiency aluminum plate fins. Coils shall be a multirow, staggered tube design with a minimum of 3 rows. All cooling coils shall have an interlaced coil circuiting that keeps the full coil face active at all load conditions. All coils shall be factory leak tested with high pressure air under water.
C. The cooling coil shall have an electronic controlled expansion valve. The unit controller shall control the expansion valve to maintain liquid subcooling and the superheat of the refrigerant system.
D. The refrigerant suction lines shall be fully insulated from the expansion valve to the compressors.
E. The drain pan shall be stainless steel and positively sloped. The slope of the drain pan shall be in two directions and comply with ASHRAE Standard 62.1. The drain pan shall have a minimum slope of 1/8" per foot to provide positive draining. The drain pan shall extend beyond the leaving side of the coil. The drain pan shall have a threaded drain connection extending through the unit base. 354
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2.07 SUPPLY FAN
A. Supply fan shall be a single width, single inlet (SWSI) airfoil centrifugal fan. The fan wheel shall be Class II construction with fan blades that are continuously welded to the hub plate and end rim. The supply fan shall be a direct drive fan mounted to the motor shaft. Belts and sheaves are not acceptable due to the additonal maintenance.
B. All fan assemblies shall be statically and dynamically balanced at the factory, including a final trim balance, prior to shipment.
C. Supply fan and motor assembly combinations larger than 8 hp or 22” diameter shall be internally isolated on 1” deflection, spring isolators and include removable shipping tie downs.
D. The fan motor shall be a totally enclosed EC motor that is speed controlled by the rooftop unit controller. The motor shall include thermal overload protection and protect the motor in the case of excessive motor temperatures. The motor shall have phase failure protection and prevent the motor from operation in the event of a loss of phase. Motors shall be premium efficiency.
E. The supply fan shall be capable of airflow modulation from 30% to 100% of the scheduled designed airflow. The fan shall not operate in a state of surge at any point within the modulation range.
2.08 HEATING SECTION
A. The rooftop unit shall include an electrical resistance heating coil section. Staged electric heating coil modules shall be factory installed downstream of the supply air fan in the heating section of the rooftop unit. Heating coils shall be constructed of a low watt density, nickel - chromium alloy resistance wire with intermediate supports that include ceramic bushings. The electrical contactors shall be of the full line-breaking type with all the electrical power legs being disconnected when the contactors are not energized. All electrical circuit wiring shall be designed with copper conductors, aluminum wires are not acceptable. Heating element branch circuits shall be individually fused to a maximum of 48 Amps per NEC requirements. The power supply for the electric heater shall be factory wired into the units main power block or disconnect switch.
B. The heating modules shall have an automatic reset, high temperature limit safety protection. A secondary high limit protection shall also be provided that requires a manual reset. An airflow switch shall be provided with the heating module to prevent the electric heater from operating in the event of no airflow.
C. The electric heater elements shall be controlled by the factory installed DDC unit control system.
The heater shall have 4 stages of control.
D. Field installed heating modules shall require a field ETL certification. Duct heaters mounted within the rooftop unit in the field shall not be acceptable. The manufacturer’s rooftop unit ETL certification shall cover the complete unit including the electric heating modules
2.09 HEAT PUMP HEATING
A. The evaporator coil, condenser coil, compressors and refrigerant circuit shall be designed for heatpump operation. The refrigerant circuit shall contain a 4 way reversing valve for the heatpump operation. The outdoor coil shall have an electronic expansion valve to control the refrigerant flow.
The unit controller shall modulate the expansion valve to maintain compressor operation within the compressor operational envelope.
B. The refrigerant system shall have a pump-down cycle.
C. The unit shall have an electric resistance heating coil for auxiliary heating. When the heatpump operation cannot maintain the discharge air temperature setpoint the electric heating coil shall temper the airstream to the discharge air temperature setpoint. 355
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2.010 CONDENSING SECTION
A. Outdoor coils shall have seamless copper tubes, mechanically bonded into aluminum plate-type fins. The fins shall have full drawn collars to completely cover the tubes. A sub-cooling coil shall be an integral part of the main outdoor air coil. Each outdoor air coil shall be factory leak tested with high-pressure air under water.
B. Fan motors shall be an ECM type motor for proportional control. The unit controller shall proportionally control the speed of the condenser fan motors to maintain the head pressure of the refrigerant circuit from ambient condition of 25~120°F. Mechanical cooling shall be provided to 25º F.
The motor shall include thermal overload protection and protect the motor in the case of excessive motor temperatures. The motor shall have phase failure protection and prevent the motor from operation in the event of a loss of phase.
C. The condenser fan shall be low noise blade design. Fan blade design shall be a dynamic profile for low tip speed. Fan blade shall be of a composite material.
D. The unit shall have scroll compressors. One of the compressors shall be an inverter compressor providing proportional control. The unit controller shall control the speed of the compressor to maintain the discharge air temperature. The inverter compressor shall have a separate oil pump and an oil separator for each compressor that routes oil back to the compressor instead of through the discharge line.
E. Pressure transducers shall be provided for the suction pressure and head pressure. Temperature sensor shall be provided for the suction temperature and the refrigerant discharge temperature of the compressors. All of the above devices shall be an input to the unit controller and the values be displayed at the unit controller.
F. Refrigerant circuit shall have a bypass valve between the suction and discharge refrigerant lines for low head pressure compressor starting and increased compressor reliability. When there is a call for mechanical cooling the bypass valve shall open to equalizing the suction and discharge pressures.
When pressures are equalized the bypass valve shall close and the compressor shall be allowed to start.
G. Each circuit shall be dehydrated and factory charged with R-410A Refrigerant and oil.
2.011 ELECTRICAL
A. Unit wiring shall comply with NEC requirements and with all applicable UL standards. All electrical components shall be UL recognized where applicable. All wiring and electrical components provided with the unit shall be number and color-coded and labeled according to the electrical diagram provided for easy identification. The unit shall be provided with a factory wired weatherproof control panel. Unit shall have a single point power terminal block for main power connection. A terminal board shall be provided for low voltage control wiring. Branch short circuit protection, 115-volt control circuit transformer and fuse, system switches, and a high temperature sensor shall also be provided with the unit. Each compressor and condenser fan motor shall be furnished with contactors and inherent thermal overload protection. Supply fan motors shall have contactors and external overload protection. Knockouts shall be provided in the bottom of the main control panels for field wiring entrance.
B. A single non-fused disconnect switch shall be provided for disconnecting electrical power at the unit. Disconnect switches shall be mounted internally to the control panel and operated by an externally mounted handle.
2.012 CONTROLS
A. Provide a complete integrated microprocessor based Direct Digital Control (DDC) system to control all unit functions including temperature control, scheduling, monitoring, unit safety protection, including compressor minimum run and minimum off times, and diagnostics. This system shall consist of all 356
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HVAC Replacement 237416 - 6 Packaged Rooftop Air Conditioning Units required temperature sensors, pressure sensors, controller and keypad/display operator interface. All MCBs and sensors shall be factory mounted, wired and tested.
B. The stand-alone DDC controllers shall not be dependent on communications with any on-site or remote PC or master control panel for proper unit operation. The microprocessor shall maintain existing set points and operate stand alone if the unit loses either direct connect or network communications. The microprocessor memory shall be protected from voltage fluctuations as well as any extended power failures. All factory and user set schedules and control points shall be maintained in nonvolatile memory. No settings shall be lost, even during extended power shutdowns.
C. The DDC control system shall permit starting and stopping of the unit locally or remotely. The control system shall be capable of providing a remote alarm indication. The unit control system shall provide for outside air damper actuation, emergency shutdown, remote heat enable/disable, remote cool enable/disable, heat indication, cool indication, and fan operation.
D. All digital inputs and outputs shall be protected against damage from transients or incorrect voltages. All field wiring shall be terminated at a separate, clearly marked terminal strip.
E. The DDC controller shall have a built-in time schedule. The schedule shall be programmable from the unit keypad interface. The schedule shall be maintained in nonvolatile memory to insure that it is not lost during a power failure. There shall be one start/stop per day and a separate holiday schedule.
The controller shall accept up to sixteen holidays each with up to a 5-day duration. Each unit shall also have the ability to accept a time schedule via BAS network communications.
F. The keypad interface shall allow convenient navigation and access to all control functions. The unit keypad/display character format shall be 4 lines x 20 characters. All control settings shall be password protected against unauthorized changes. For ease of service, the display format shall be English language readout. Coded formats with look-up tables will not be accepted. The user interaction with the display shall provide the following information as a minimum:
1. Return air temperature.
2. Discharge air temperature.
3. Outdoor air temperature.
4. Space air temperature.
5. Outdoor enthalpy, high/low.
6. Compressor suction temperature and pressure
7. Compressor head pressure and temperature
8. Expansion valve position
9. Condenser fan speed
10. Inverter compressor speed
11. Dirty filter indication.
12. Airflow verification.
13. Cooling status.
14. Control temperature (Changeover).
15. VAV box output status.
16. Cooling status/capacity.
17. Unit status.
18. All time schedules.
19. Active alarms with time and date.
20. Previous alarms with time and date.
21. Optimal start
22. Supply fan and exhaust fan speed.
23. System operating hours.
a. Fan
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HVAC Replacement 237416 - 7 Packaged Rooftop Air Conditioning Units b. Exhaust fan
c. Cooling
d. Inndividual compressor
e. Heating
f. Economizer
g. Tenant override
G. The user interaction with the keypad shall provide the following:
1. Controls mode
a. Off manual
b. Auto
c. Heat/Cool
d. Cool only
e. Heat only
f. Fan only
2. Occupancy mode
a. Auto
b. Occupied
c. Unoccupied
d. Tenant override
3. Unit operation changeover control
a. Return air temperature
b. Space temperature
c. Network signal
4. Cooling and heating change-over temperature with deadband
5. Cooling discharge air temperature (DAT)
6. Supply reset options
a. Return air temperature
b. Outdoor air temperature
c. Space temperature
d. Airflow (VAV)
e. Network signal
f. External (0-10 vdc)
g. External (0-20 mA)
7. Temperature alarm limits
a. High supply air temperature
b. Low supply air temperature
c. High return air temperature
8. Lockout control for compressors.
9. Compressor interstage timers
10. Night setback and setup space temperature.
11. Building static pressure.
12. Economizer changeover
a. Enthalpy
b. Drybulb temperature
13. Currently time and date
14. Tenant override time
15. Occupied/unoccupied time schedule
16. One event schedule
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17. Holiday dates and duration
18. Adjustable set points
19. Service mode
a. Timers normal (all time delays normal)
b. Timers fast (all time delays 20 sec)
H. If the unit is to be programmed with a night setback or setup function, an optional space sensor shall be provided. Space sensors shall be available to support field selectable features. Sensor options shall include:
1. Zone sensor with tenant override switch
2. Zone sensor with tenant override switch plus heating and cooling set point adjustment. (Space Comfort Control systems only)
I. To increase the efficiency of the cooling system the DDC controller shall include a discharge air temperature reset program for part load operating conditions. The discharge air temperature shall be controlled between a minimum and a maximum discharge air temperature (DAT) based on one of the following inputs:
1. Airflow
2. Outside air temperature
3. Space temperature
4. Return air temperature
5. External signal of 1-5 vdc
6. External signal of 0-20 mA
7. Network signal
2.013 ROOF CURB
A. A prefabricated heavy gauge galvanized steel, mounting curb shall be provided for field assembly on the roof decking prior to unit shipment. The roof curb shall be a full perimeter type with complete perimeter support of the air handling section and condensing section. The curb shall be a minimum of 14" high and include a nominal 2" x 4" wood nailing strip. Gasket shall be provided for field mounting between the unit base and roof curb.
END OF SECTION 237416
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HVAC Replacement 238129 - 1 Variable Refrigerant Volume HVAC System SECTION 238129
VARIABLE REFRIGERANT VOLUME HVAC SYSTEM
PART 1 GENERAL
1.01 SECTION INCLUDES
A. Variable refrigerant volume HVAC system includes:
1. Outdoor/Condensing unit(s):
a. Size Range: 8 to 16 Tons Nominal
b. Daikin Model Numbers:
RXYQ96XAYD*
RXYQ120XAYD*
RXYQ192XAYD*
2. Indoor Units
a. *Input information as required
1.02 RELATED REQUIREMENTS
A. N/A
1.03 REFERENCES
A. N/A
1.04 SUBMITTALS
A. Shop Drawings: Indicate assembly, unit dimensions, weight loading, required clearances, construction details, field connection details, electrical characteristics and connection requirements.
B. Product Data:
1. Provide literature that indicates dimensions, weights, capacities, ratings, fan performance, and electrical characteristics and connection requirements.
2. Manufacturer’s Installation Instructions.
1.05 OPERATION AND MAINTENANCE DATA
A. Maintenance Data: Provide instructions for installation, maintenance and service
1.06 QUALITY ASSURANCE
A. MANUFACTURER QUALIFICATIONS:
1. The units shall be tested by a National Recognized Testing Laboratory (NRTL), in accordance with ANSI/UL 60335-2-40 – Heating and Cooling Equipment and bear the Listed Mark.
2. All wiring shall be in accordance with the National Electric Code (NEC).
3. The system will be produced in an ISO 9001 and ISO 14001 facility, which are standards set by the International Standard Organization (ISO). The system shall be factory tested for safety and function.
4. The condensing unit will be factory charged with R410A.
1.07 DELIVERY, STORAGE AND HANDLING
A. Unit shall be stored and handled according to the manufacturer’s recommendations. 360
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1.08 WARRANTY
A. STANDARD LIMITED WARRANTY
1. Complete warranty details available from your local Daikin representative or at www.daikincomfort.com.
2. Daikin North America LLC warrants original owner of the non-residential building, multifamily residence or residence in which the Daikin products are installed that under normal use and maintenance for comfort cooling and conditioning applications such products (the “Products”) will be free from defects in material and workmanship. This warranty applies to compressor and all parts and is limited in duration to ten (10) years starting from the ‘’installation date’’ which is one of the two dates below:
a. The installation date is the date that the unit is originally commissioned, but no later than 18 months after the manufacture date noted on the unit’s rating plate. b. If the date the unit is originally commissioned cannot be verified, the installation date is three months after the manufacture date.
PART 2 PRODUCTS
2.01 MANUFACTURERS
A. DESIGN BASIS:
1. The HVAC equipment basis of design is Daikin North America. All bidders shall furnish the minimum system standards as defined by the base bid model numbers, model families or as otherwise specified herein (see Appendix A HVAC Equipment Alternate General Information). In any event, the contractor shall be responsible for all specified items and intents of this document without further compensation.
2.02 HVAC SYSTEM DESIGN
A. SYSTEM DESCRIPTION:
1. The variable capacity heat pump air conditioning system shall be a Daikin Variable Refrigerant Volume Series (heat or cool model) system as specified.
2. The system shall consist of multiple evaporators using PID control, REFNET™ joints and headers, a two-pipe refrigeration distribution system and Daikin VRV condenser unit.
3. The condenser shall be a direct expansion (DX), air-cooled heat pump, multi-zone airconditioning system with variable speed inverter driven compressors using R-410A refrigerant.
4. The condensing unit may connect an indoor evaporator capacity up to 200% of the condensing unit capacity. All zones are each capable of operating separately with individual temperature control.
5. The Daikin condensing unit shall be interconnected to indoor unit models CXTQ, FXFQ, FXHQ, FXUQ, FXEQ, FXMQ, FXLQ, FXNQ, FXSQ, FXTQ, FXDQ, FXZQ, FXAQ and FXMQ_MF, and shall range in capacity from 5,800 Btu/h to 96,000 Btu/h in accordance with Daikin’s engineering data book detailing each available indoor unit. a. The indoor units shall be connected to the condensing unit utilizing Daikin’s REFNET™ specified piping joints and headers to ensure correct refrigerant flow and balancing. T style joints are not acceptable for a variable refrigerant system.
6. Operation of the system shall permit either cooling or heating of all of the indoor units simultaneously. Each indoor unit or group of indoor units shall be able to provide set temperature independently via a local remote controller, an Intelligent Manager, an Intelligent Controller or a BMS interface.
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7. The RXYQ_XA condensing unit model numbers and the associated number of connectable indoor units per RXYQ_XA condensing unit is indicated in the following table. Each indoor unit or group of indoor units shall be independently controlled.
MODEL NUMBER NOMINAL CAPACITY (Tons) MAXIMUM NUMBER OF
INDOOR UNITS
RXYQ96XAYD* 8 16
RXYQ120XAYD* 10 20
RXYQ192XAYD* 16 33
B. VRV IV X FEATURES AND BENEFITS
1. Voltage Platform - Heat pump condensing units shall be available with a 460V/3ph/60Hz power supply.
2. Gas Furnace Connectivity – Heat Pump condensing units shall be connectable to Daikin Communicating gas furnaces with AFUE ranging from 80% to 97%.
3. System shall be capable of connecting to multiple VRV A-coils (CXTQ) paired with Daikin Communicating gas furnaces allowing for options of gas or heat pump heating to optimize operational costs.
4. The system shall be able to switch between heat pump heating and gas furnace heating at a field selectable change-over temperature which can be configured via condensing unit field settings.
5. Each system shall be able to enlarge from single to dual module or dual to triple module without the need for installed main pipe size changes. The manufacturer shall provide predefined pipe sizes and design rules ensuring reliable system operation and offering design flexibility in phased installation applications.
6. Stable Operation – System shall provide stable inverter operation at varied ambient conditions.
7. Auto Changeover – System shall, below the field selected outdoor ambient temperature provide signal to initiate auxiliary or back up heat.
8. Advanced Zoning - A single system shall provide for up to 64 zones.
9. Independent Control - Each indoor unit shall use a dedicated electronic expansion valve with 2000 positions for independent control.
10. VFD Inverter Control and Variable Refrigerant Temperature - Each condensing unit shall use high efficiency, variable speed all “inverter” compressor(s) coupled with inverter fan motors to optimize part load performance. The system capacity and refrigerant temperatures shall be modulated automatically to set suction and condensing pressures while varying the refrigerant volume for the needs of the cooling or heating loads. The control will be automatic and customizable depending on load and weather conditions. a. Indoor shall use PID to control superheat to deliver a comfortable room temperature condition and optimize efficiency.
11. Configurator software - Each system shall be available with configurator software package to allow for remote configuration of operational settings and also for assessment of operational data and error codes.
a. If this software is not provided by an alternate manufacturer, for each individual outdoor unit the contractor shall do the settings manually and keep detailed records for future maintenance purposes.
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12. Independent Control - Each indoor unit shall use a dedicated electronic expansion valve for independent control.
13. Flexible Design –
a. Systems shall be capable of up to 540ft (165m) [623 ft. (190m) equivalent] of linear piping between the condensing unit and furthest located indoor unit. b. Systems shall be capable of up to 3,280ft (1,000m) total “one-way” piping in the piping network.
c. Systems shall have a vertical (height) separation of up to 295ft (90m) between the condensing unit and the indoor units.
d. Systems shall be capable of up to 295ft from the first REFNET™ / branch point. e. The condensing unit shall have the ability to connect an indoor unit evaporator capacity of up to 200% of the condensing unit nominal capacity. f. Systems shall be capable of 98ft (30m) vertical separation between indoor units. g. Condensing units shall be supported with a fan motor ESP up to 0.32” WG as standard to allow connection of discharge ductwork and to prevent discharge air short circuiting.
14. Oil Return – Each system shall be furnished with a centrifugal oil separator and active oil recovery cycle.
15. Simple wiring – Systems shall use 16/18 AWG, 2 wire, stranded, non-shielded and nonpolarized daisy chain control wiring.
16. Outside Air – Systems shall provide outside air capability.
17. Space saving – Each system shall have a condensing unit module footprint no larger than 48-7/8” x 30-3/16” (1694mm x 1242mm x 767mm).
18. Each condensing unit shall include a multi-functional digital display that can provide system operation status such as operating refrigerant temperatures, pressures, outdoor electronic expansion valve opening and compressor operation time.
19. Each condensing unit shall include a service window that can provide easy access to system field settings and operation status without completely removing the condensing unit panel.
20. Advanced diagnostics – Systems shall include a self-diagnostic, auto-check function to detect a malfunction and display the type and location.
21. Each condensing unit shall incorporate contacts for electrical demand shedding with optional 3 stage demand control with 12 customizable demand settings.
22. Advanced controls – Each system shall have at least one remote controller capable of controlling up to 16 indoor units.
23. Each system shall be capable of integrating with open protocol BACnet and LonWorks building management systems.
24. Low sound levels - Each system shall use indoor and condensing units with quiet operation as low as 27 dB(A).
25. The condensing unit shall have configurable settings for intermittent fan operation to help minimize snow accumulation on fan blades when the system is off.
26. .
C. PERFORMANCE:
1. The VRV IV X RXYQ_XA system shall perform as indicated below:
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MODEL NUMBER SYSTEM IEER
(Ducted)
SYSTEM IEER
(Non-Ducted)
RXYQ96XAYD* 22.5 27.3
RXYQ120XAYD* 22.0 25.4
RXYQ192XAYD* 21.2 22.2
MODEL NUMBER SYSTEM EER
(Ducted)
SYSTEM EER
(Non-Ducted)
RXYQ96XAYD* 12.6 14.3
RXYQ120XAYD* 11.6 12.4
RXYQ192XAYD* 11.6 11.5
MODEL NUMBER SYSTEM COP@47°F
(Ducted)
SYSTEM COP@47°F
(Non-Ducted)
RXYQ96XAYD* 3.49 4.21
RXYQ120XAYD* 3.30 3.56
RXYQ192XAYD* 3.29 3.68
MODEL NUMBER SYSTEM COP@17°F
(Ducted)
SYSTEM COP@17°F
(Non-Ducted)
RXYQ96XAYD* 2.50 2.70
RXYQ120XAYD* 2.40 2.30
RXYQ192XAYD* 2.20 2.30
2. Performance Conditions:
a. Cooling: Indoor temperature of 80°FDB (26.7°CDB), 67°FWB (19.5°CWB) and outdoor temperature of 95°FDB (35°CDB).
b. Heating: Indoor temperature of 70°FDB (21.1°CDB) and outdoor temperature of 47°FDB (8.3°CDB), 43°FWB (6.1°CDB).
c. Equivalent piping length: 25ft (7.5m)
3. Cooling Operation:
a. The operating range in cooling will be 23°F DB ~ 122°F DB (-5°CDB ~ 50°CDB). b. Cooling mode indoor room temperature range will be 57-77°FWB (13.8 - 25°CWB). c. Cooling operation may be extended down to 10°F DB when the system is designed with the following limitations:
1) The system must be a single module outdoor unit: RXYQ72/96/120/144/168XA. 2) The smallest capacity indoor unit connected to the system must be 12,000 Btu/h. 3) The system must run continuously in cooling operation with a minimum of 1.5 tons of indoor units in operation.
4. Heating Operation:
a. The operating range in heating will be -4°F WB – 60°F WB (-20°CWB – 15.5°CWB). b. Heating mode indoor room temperature range will be 59°FDB - 80°F DB (15°CDB –
26.7°CDB).
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2.03 EQUIPMENT
A. ELECTRICAL:
1. The power supply to the condensing unit shall be:
POWER SUPPLY VOLTAGE VOLTAGE RANGE
460V / 3ph / 60 Hz 187V – 253V (±10%)
MODEL MCA MOP COMPRESSOR RLA
RXYQ96XAYD* 20.6 25 10.2
RXYQ120XAYD* 20.6 25 11.7
RXYQ192XAYD* 12.3 + 20.6 20 + 25 7.1 + 11.7
B. WIRING:
1. The control voltage between the indoor and condensing unit shall be 16VDC nonshielded, stranded 2 conductor cable.
2. The control wiring shall be a two-wire multiplex transmission system, making it possible to connect multiple indoor units to one condensing unit with one 2-cable wire, thus simplifying the wiring installation.
3. The control wiring maximum lengths shall be as shown below:
CONDENSER TO
INDOOR UNIT
CONDENSER TO
CENTRAL
CONTROLLER
INDOOR UNIT TO
REMOTE CONTROL
CONTROL WIRING
LENGTH 6,560 ft (2,000 m) 3,280 ft (1,000 m) 1,640 ft (500 m) WIRE TYPE 16/18 AWG, 2 wire, non-polarity, non-shielded, stranded C. REFRIGERANT PIPING:
1. The system shall be capable of refrigerant piping up to 540ft (165m) actual or 623ft (190m) equivalent from the condensing unit to the furthest indoor unit, a total combined liquid line length of 3,280ft (1,000m) of piping between the condensing and indoor units with 295ft (90m) maximum vertical difference, without any oil traps or additional components.
2. REFNET™ piping joints and headers shall be used to ensure proper refrigerant balance and flow for optimum system capacity and performance.
a. T style joints shall not be acceptable as this will negatively impact proper refrigerant balance and flow for optimum system capacity and performance.
D. PAINT/CORROSION RESISTANCE:
1. Paint and corrosion resistance shall be at a minimum per the table below:
COMPONENT
VRV IV X
BASE MATERIAL SURFACE
TREATMENT
COATING
THICKNESS
External & Internal
Surface
EXTERNAL
PANEL BASE Galvanized steel POLYESTER ≧1.5 mils
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COMPONENT
VRV IV X
BASE MATERIAL SURFACE
TREATMENT
COATING
THICKNESS
External & Internal
Surface
EXTERNAL
FRONT PANEL Galvanized steel POLYESTER ≧1.5 mils
PILLAR Galvanized steel POLYESTER ≧1.5 mils
COMPRESSOR
COVER ASTM material Resin Paint ≧0. 78 mils
FIN GUARD Iron wire Resin Paint ≧0. 79 mils
FAN GUARD AND
DRUM Polypropylene No treatment required N/A
FAN Acrylonitrile - glass No treatment required N/A
FAN MOTOR
FRAME Resin No treatment required N/A
FAN MOTOR
SHAFT Carbon steel No treatment required N/A
FAN MOTOR
SUPPORT Galvanized steel POLYESTER ≧1.5 mils
HEAT
EXCHANGERS
(FIN ONLY)
Aluminum Polymer Anti-corrosion
surface treatment
Salt Spray 1000 hours,
blister rating 10
ELECTRICAL
PARTS BOX
Hot-dip zinccoated steel No treatment required N/A
ELECTRICAL
PARTS BOARD
Glass cloth / Glass
nonwoven cloth
material
Insulation Varnish No specific thickness
SCREWS Carbon steel wire
rods
High corrosion
resistance treatment ≧0. 28 mils
2.04 OUTDOOR/CONDENSING UNIT
A. GENERAL:
1. The condensing unit is designed specifically for use with VRV series components.
2. The condensing unit shall be factory assembled in the USA and pre-wired with all necessary electronic and refrigerant controls.
3. The refrigeration circuit of the condensing unit shall consist of Daikin inverter scroll compressors, motors, fans, condenser coil, electronic expansion valves, solenoid valves, 4-way valve, distribution headers, capillaries, filters, shut off valves, oil separators, service ports and refrigerant accumulator.
4. Liquid and suction lines must be individually insulated between the condensing and indoor units.
5. The condensing unit can be wired and piped with access from the left, right, rear or bottom.
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6. The connection ratio of indoor units to condensing unit shall be permitted up to 200% of nominal capacity.
7. Each condensing system shall be able to support the connection of up to 64 indoor units dependent on the model of the condensing unit.
8. The sound pressure level standard shall be that value as listed in the Daikin engineering manual for the specified models at 3 feet from the front of the unit. The condensing unit shall be capable of operating automatically at further reduced noise during night time or via an external input.
9. The system will automatically restart operation after a power failure and will not cause any settings to be lost, thus eliminating the need for reprogramming.
10. The condensing unit shall be modular in design and should allow for side-by-side installation with minimum spacing.
11. The following safety devices shall be included on the condensing unit; high pressure sensor and switch, low pressure switch, control circuit fuses, crankcase heaters, fusible plug, overload relay, inverter overload protector, thermal protectors for compressor and fan motors, over current protection for the inverter and anti-recycling timers.
12. To ensure the liquid refrigerant does not flash when supplying to the various indoor units, the circuit shall be provided with a sub-cooling feature.
13. Oil recovery cycle shall be automatic occurring 2 hours after start of operation and then every 8 hours of operation.
14. The condensing unit shall be capable of heating operation at -4°F (-20°C) wet bulb ambient temperature without additional low ambient controls or an auxiliary heat source.
B. UNIT CABINET:
1. The condensing unit shall be completely weatherproof and corrosion resistant. The unit shall be constructed from rust-proofed galvanized steel panels coated with a baked enamel finish.
C. FAN:
1. The condensing unit shall consist of one or more propeller type, direct-drive 500 or 600 W fan motors that have multiple speed operation via a DC (digitally commutating) inverter.
2. The condensing unit fan motor shall have multiple speed operation of the DC (digitally commutating) inverter type, and be of high external static pressure and shall be factory set as standard at 0.12 in. WG. A field setting switch to a maximum 0.32 in. WG pressure is available to accommodate field applied duct for indoor mounting of condensing units.
3. The fan shall be a vertical discharge configuration with a nominal airflow maximum range of 5,544 CFM to 22,283 CFM dependent on model specified.
4. The fan motor shall have inherent protection and permanently lubricated bearings and be mounted.
D. The fan motor shall be provided with a fan guard to prevent contact with moving parts. 367
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HVAC Replacement 238129 - 9 Variable Refrigerant Volume HVAC System E. SOUND:
1. Nominal sound pressure levels shall be as shown below.
MODEL NUMBER SOUND PRESSURE LEVEL dB(A)
RXYQ96XAYD* 61
RXYQ120XAYD* 61
RXYQ192XAYD* 63
2. Night setback control of the fan motor for low noise operation by way of automatically limiting the maximum speed shall be a standard feature. Operation sound level shall be selectable from 3 steps.
OPERATION SOUND dB(A) NIGHT MODE
SOUND PRESSURE LEVEL dB(A) APPROX.
Level 1 55
Level 2 50
Level 3 45
F. CONDENSER COIL:
1. The condenser coil shall be manufactured from copper tubes expanded into aluminum fins to form a mechanical bond.
2. The heat exchanger coil shall be of a waffle louver fin and rifled bore tube design to ensure high efficiency performance.
3. The heat exchanger on the condensing units shall be manufactured from Hi-X seamless copper tube with N-shape internal grooves mechanically bonded on to aluminum fins to an e-Pass Design.
4. The fins shall be coated with an anti-corrosion hydrophilic blue coating as standard from factory with a salt spray test rating of 1000hr per ASTM test standards.
G. The condensing unit shall be factory equipped with condenser coil guards on all sides.
H. COMPRESSOR:
1. The Daikin inverter scroll compressors shall be variable speed (PVM inverter) controlled which is capable of changing the speed to follow the variations in total cooling and heating load as determined by the suction gas pressure as measured in the condensing unit.
a. In addition, samplings of evaporator and condenser temperatures shall be made so that the high/low pressures detected are read every 20 seconds and calculated. With each reading, the compressor capacity (INV frequency) shall be controlled to eliminate deviation from target value.
1) Non –inverter-driven compressors, which may cause starting motor current to exceed the nominal motor current (RLA) and require larger wire sizing, shall not be allowed.
2. The inverter driven compressors in the condensing unit shall be of highly efficient reluctance DC (digitally commutating), hermetically sealed scroll “G-type” or “J-type”.
3. Neodymium magnets shall be adopted in the rotor construction to yield a higher torque and efficiency in the compressor instead of the normal ferrite magnet type. a. At complete stop of the compressor, the neodymium magnets will position the rotor into the optimum position for a low torque start.
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4. The capacity control range shall be as low as 10% to 100%.
5. The compressor’s motor shall have a cooling system using discharge gas, to avoid sudden changes in temperature resulting in significant stresses on winding and bearings.
6. Each compressor shall be equipped with a crankcase heater, high pressure safety switch, and internal thermal overload protector.
7. Oil separators shall be standard with the equipment together with an intelligent oil management system.
8. The compressor shall be mounted on vibration dampening rubber grommets to minimize the transmission of vibration, eliminating the standard need for external spring isolation.
9. In the event of compressor failure, the remaining compressors shall continue to operate and provide heating or cooling as required at a proportionally reduced capacity. The microprocessor and associated controls shall be manually activated to specifically address this condition for single module and manifolded systems.
10. In the case of multiple condenser modules, conjoined operation hours of the compressors shall be balanced by means of the Duty Cycling Function, ensuring sequential starting of each module at each start/stop cycle, completion of oil return, completion of defrost or every 8 hours. When connected to a central control system sequential start is activated for all system on each DIII network.
Direct Expansion (DX), Variable Capacity, Split System
Size Range:
0.6 to 16 Tons Nominal
Daikin Model Number:
EKEQFCBAV3-US – AHU INTEGRATION KIT (W-CONTROL BOX)
EKEQMCBAV3-US – AHU INTEGRATION KIT (Z-CONTROL BOX)
EKEXV50-US – AHU INTEGRATION KIT EXPANSION VALVE 18 MBH EKEXV63-US – AHU INTEGRATION KIT EXPANSION VALVE 24 MBH EKEXV80-US – AHU INTEGRATION KIT EXPANSION VALVE 30 MBH EKEXV100-US – AHU INTEGRATION KIT EXPANSION VALVE 36 MBH EKEXV125-US – AHU INTEGRATION KIT EXPANSION VALVE 48 MBH EKEXV140-US – AHU INTEGRATION KIT EXPANSION VALVE 60 MBH EKEXV200-US – AHU INTEGRATION KIT EXPANSION VALVE 72 MBH EKEXV250-US – AHU INTEGRATION KIT EXPANSION VALVE 96 MBH EKEXV400-US – AHU INTEGRATION KIT EXPANSION VALVE 144 MBH EKEXV500-US – AHU INTEGRATION KIT EXPANSION VALVE 192 MBH Part 1 – GENERAL
VARIABLE REFRIGERANT VOLUME (VRV) AIR CONDITIONING SPECIFICATION – Heat Recovery / Heat Pump Air Handling Unit Integration Kit
1.01 QUALITY ASSURANCE
A. The units shall be tested by a Nationally Recognized Testing Laboratory (NRTL), in accordance with ANSI/UL 1995/CAN/CSA-C22.2 No. 236-05 (R2009) – Heating and Cooling Equipment, and shall bear the Listed Mark.
B. All wiring shall be in accordance with the National Electric Code (NEC)/Canadian Electrical Code (CEC).
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1.02 DELIVERY, STORAGE AND HANDLING
A. Unit shall be stored and handled according to the manufacturer’s recommendations.
Part 2 – WARRANTY
2.01STANDARD LIMITED WARRANTY
Daikin North America LLC warrants original owner of the non-residential building, multifamily residence or residence in which the Daikin products are installed that under normal use and maintenance for comfort cooling and conditioning applications such products (the “Products”) will be free from defects in material workmanship. This warranty applies to compressor and all parts and is limited in duration to ten (10) years starting from the “installation date” which is one of the two dates below:
1. The installation date is the date that the unit is original commissioned, but no later than 18 months after the manufacture date noted on the unit’s rating plate.
2. If the date the unit is originally commissioned cannot be verified, the installation date is three months after the manufacture date.
Part 3 – PERFORMANCE
3.01 DESIGN BASIS
The HVAC equipment basis of design is Daikin. All bidders shall furnish the minimum system standards as defined by the base bid model numbers, model families or as otherwise specified herein (see Key General Specifications Alternate Supplier Checklist). In any event the contractor shall be responsible for all specified items and intents of this document without further compensation.
Part 4 – PRODUCTS
4.01 EKEQFCBAV3-US
A. General:
1. Daikin model EKEQFCBAV3-US control box shall be used to control the flow of R-410a refrigerant to a non-VRV air handling unit connected to a VRV condensing unit by means of an appropriate Daikin EKEXV***-US expansion valve kit. Each EKEQFCBAV3-US control shall be paired with no more than one EKEXV***-US expansion valve kit. The EKEQFCBAV3-US shall control the refrigerant flow as determined by a 0-10VDC input provided by a field-supplied DDC controller
2. The unit shall be furnished with 2 thermistors required for control of the expansion valve. These thermistors shall be field-installed in the air handling unit as required.
3. The unit shall be furnished with 9 capacity setting adaptors, each corresponding to an appropriate EKEXV***-US capacity selection.
4. The unit shall be furnished with a conduit mounting plate and sealing gasket.
B. Unit Enclosure:
1. The unit enclosure shall be constructed of a polymer resin suitable for indoor or outdoor installation in accordance with UL1995.
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2. The units shall be constructed such that the when the cover is opened for electrical connections, the cover shall remain attached to the body of the control box.
C. Electrical:
1. A separate power supply will be required of 208/230 volts, 1 phase, 60 hertz. The acceptable voltage range shall be 187 to 253 volts.
2. Transmission (control) wiring between the EKEQFCBAV3-US and the VRV outdoor unit shall be a maximum of 3,280 feet (total 6,560 feet).
3. The length of transmission (control) wiring between the EKEQFCBAV3-US and the field-supplied DDC controller shall be determined by the DDC manufacturer.
4. The length of transmission (power and control) wiring between the EKEQFCBAV3-US and the EKEXV***-US shall be a maximum of 65 feet (20m).
5. All wiring shall be in accordance with National Electric Code (NEC)/Canadian Electrical Code (CEC) and any applicable local or regional codes.
D. Control:
1. The EKEQFCBAV3-US shall receive a 0-10V DC input from a field-supplied DDC controller.
2. The VRV outdoor unit shall adjust the system target evaporating temperature (in cooling mode) and target condensing temperature (in heating mode) in response to the 0-10V DC input.
3. The unit shall receive a 16V DC analog input from the included liquid pipe thermistor attached to the field supplied air handling unit. The thermistor shall be field-installed as necessary with the included 8.5 feet of wiring.
4. The unit shall receive a 16V DC analog input from the included gas pipe thermistor attached to the field supplied air handling unit. The thermistor shall be field-installed as necessary.
5. The unit shall be compatible with the Daikin BRC1E72, BRC1E73, and BRC2A71 indoor unit controllers for purposes of field-setting and troubleshooting purposes only. These controllers shall not be used for controlling refrigerant flow to the expansion valve.
6. The unit shall be capable of receiving a contact input On/Off signal.
7. The unit shall provide a 16V DC output to the EKEXV_-US expansion valve.
This output shall provide both power and communication/control to the expansion valve.
8. The unit shall provide a voltage-free contact signal output for use with the air handling unit fan operation. Additional fan speed control shall be via the DDC controller or other Building Management System control.
9. The unit shall provide a voltage-free contact signal output indicating compressor on/off operation.
10. The unit shall provide a voltage-free contact error signal output.
11. The unit shall provide a voltage-free contact signal output indicating the VRV outdoor unit is in a defrost cycle.
12. The VRT function for the VRV outdoor unit shall be automatically disabled upon connection of the EKEQFCBAV3-US.
13. The unit shall be capable of wiring to the Daikin VRV D-III Net communication using the F1,F2 terminal block.
E. Optional Accessories:
1. The unit shall be compatible with the BRC1E72, the BRC1E73, and the BRC2A71 for field setting and troubleshooting purposes only.
2. The unit shall be compatible with the I-Touch Manager (DCM601A71). 371
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3. The unit shall be compatible with the following expansion valve kits: EKEXV63- US, EKEXV80-US, EKEXV100-US, EKEXV125-US, EKEXV140-US, EKEXV200- US, EKEXV250-US, EKEXV400-US, EKEXV500-US.
4. The unit shall be compatible with DACA-KRCS-PW40 and DACA-KRCS-PW80 thermistor cables
4.02 EKEQMCBAV3-US
A. General:
1. Daikin model EKEQMCBAV3-US control box shall be used to control the flow of R-410a refrigerant to a non-VRV air handling unit connected to a VRV condensing unit by means of an appropriate Daikin EKEXV_-US expansion valve kit. Each EKEQMCBAV3-US control shall be paired with no more than one EKEXV_-US expansion valve kit. The EKEQMCBAV3-US shall control the refrigerant flow similar to a standard VRV indoor unit by measuring the return air temperature or room temperature of the space and comparing the measured value to the desired set point value.
2. The unit shall be furnished with 2 thermistors required for control of the expansion valve. These thermistors shall be field-installed in the air handling unit as required.
3. The unit shall be furnished with 1 additional thermistor for measuring the return air temperature or room temperature. This thermistor shall be field-installed in the air handling unit or in the conditioned space as required.
4. The unit shall be furnished with 10 capacity setting adaptors, each corresponding to an appropriate EKEXV-US capacity selection.
5. The unit shall be furnished with a conduit mounting plate and sealing gasket.
B. Unit Enclosure:
1. The unit enclosure shall be constructed of a polymer resin suitable for indoor or outdoor installation in accordance with UL1995.
2. The unit enclosure shall be constructed such that when opened for electrical connections, the cover shall remain attached to the main body of the control box C. Electrical:
1. A separate power supply will be required of 208/230 volts, 1 phase, 60 hertz. The acceptable voltage range shall be 187 to 253 volts.
2. Transmission (control) wiring between the EKEQMCBAV3-US and the VRV outdoor unit shall be a maximum of 3,280 feet (total 6,560 feet).
3. The length of transmission (power and control) wiring between the EKEQMCBAV3-US and the EKEXV-US shall be a maximum of 65 feet (20m).
4. All wiring shall be in accordance with National Electric Code (NEC)/Canadian Electrical Code (CEC) and any applicable local or regional codes.
D. Control:
1. The EKEQMCBAV3-US shall control the expansion valve
2. The unit shall receive a 16V DC analog input from the thermistor used to control space temperature. This thermistor may be placed in the return air stream or in the conditioned space, as appropriate.
3. The unit shall receive a 16V DC analog input from the included liquid pipe thermistor attached to the field supplied air handling unit. The thermistor shall be field-installed as necessary.
4. The unit shall receive a 16V DC analog input from the included gas pipe thermistor attached to the field supplied air handling unit. The thermistor shall be field-installed as necessary.
5. The unit shall be compatible with the Daikin BRC1E72, BRC1E73, and BRC2A71 indoor unit controllers.
6. The unit shall be capable of receiving a contact input On/Off signal. 372
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7. The unit shall provide a 16V DC output to the EKEXV_-US expansion valve.
This output shall provide both power and communication/control to the expansion valve.
8. The unit shall provide a voltage-free contact signal output for use with the air handling unit fan operation. Additional fan speed control shall be via the DDC controller or other Building Management System control.
9. The unit shall provide a voltage-free contact signal output indicating compressor on/off operation.
10. The unit shall provide a voltage-free contact error signal output.
11. The unit shall provide a voltage-free contact signal output indicating the VRV outdoor unit is in a defrost cycle.
12. The VRT function for the VRV outdoor unit shall be automatically disabled upon connection of the EKEQMCBAV3-US.
13. The unit shall be capable of wiring to the Daikin VRV D-III Net communication using the F1,F2 terminal block.
E. Optional Accessories:
1. The unit shall be compatible with the BRC1E72, the BRC1E73, and the BRC2A71 for control, field setting and troubleshooting purposes.
2. The unit shall be compatible with the I-Touch Manager (DCM601A71).
3. The unit shall be compatible with the following expansion valve kits: EKEXV50- US, EKEXV63-US, EKEXV80-US, EKEXV100-US, EKEXV125-US, EKEXV140- US, EKEXV200-US, EKEXV250-US, EKEXV400-US, EKEXV500-US.
4.03 EKEXV***-US
A. General:
1. Daikin model EKEXV***-US expansion valve kit shall be used to control the flow of R-410a refrigerant to a non-VRV air handling unit connected to a VRV condensing unit. Each EKEXV***-US shall be paired with one EKEQ*CBAV3-US control box. The EKEXV***-US shall be compatible with R-410a refrigerant, and shall be capable of an expansion valve control resolution of 2000 pulses. It shall be available in nominal capacities from 18,000 Btu/h to 192,000 Btu/h.
B. Performance:
1. The unit’s performance shall be determined by the selected operating conditions, and shall fall within the following range:
C. Unit Enclosure:
Model Number Nominal
Capacity
Cooling Capacity (Btu/h) Heating Capacity (Btu/h)
Min. Max. Min. Max.
EKEXV50-US 18 MBh 17,500 21,000 19,000 24,000
EKEXV60-US 24 MBh 21,500 26,500 24,200 30,000
EKEXV80-US 30 MBh 27,000 34,500 30,500 38,000
EKEXV100-US 36 MBh 34,000 42,000 38,500 47,000
EKEXV125-US 48 MBh 42,500 52,500 47,500 59,000
EKEXV140-US 60 MBh 53,000 60,000 59,500 67,500
EKEXV200-US 72 MBh 60,500 84,000 68,000 94,500
EKEXV250-US 96 MBh 84,500 105,000 95,000 118,500
EKEXV400-US 144 MBh 120,000 169,000 136,000 187,500
EKEXV500-US 192 MBh 170,000 210,000 188,000 236,500
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1. The unit enclosure shall be constructed of a heavy gauge sheet metal with a powder coat finish, and shall be suitable for both indoor and outdoor installation.
D. Piping:
1. All piping within the unit shall be copper.
2. The unit shall be furnished with refrigerant filter/driers on both the inlet and outlet piping to the expansion valve.
3. External refrigerant connections to the unit shall be brazed connections.
4. Both refrigerant lines shall be fully insulated from the outdoor unit.
E. Electrical:
1. The unit shall not require a dedicated power connection. Power to the expansion valve shall be provided via 12V DC input connection from the paired EKEQ*CBAV3-US control box.
2. The power wiring connection shall be made using the factory included 18 AWG wiring harness. The connection shall be capable of up to 65 ft (20m) of wiring length.
F. Control:
1. The control signal to the EKEXV***-US shall be received via the factory included 18 AWG wiring harness. The connection shall be capable of up to 65 ft. (20m) of wiring length.
G. Optional Accessories:
1. The control signal to the EKEXV***-US shall be received via the factory included 18 AWG wiring harness. The connection shall be capable of up to 65 ft. (20m) of wiring length.
VARIABLE REFRIGERANT VOLUME (VRV) HVAC SYSTEM
Advanced Multi-zone Controller – iTOUCH MANAGER
Part 1 - General
1.01. Physical characteristics
A. General:
The advanced multi-zone controller shall be made from plastic materials with a neutral color.
Each control shall have a LCD (Liquid Crystal Display) that shows On/Off, setpoint, room temperature, mode of operation (Cool/Heat/Dry/Fan/Auto), louver position, and fan speed.
1.02. Electrical characteristics
A. General:
The advanced multi-zone controller will require 24 VAC to power the controller. The advanced multi-zone controller shall supply 16 VDC to the communication bus on the F1F2 (out-out) terminal of the outdoor unit. The voltage may rise or fall in relation to the transmission packets that are sent and received.
B. Wiring:
The advanced multi-zone controller communication wiring shall be terminated in a daisy chain design at the outdoor unit, which is then daisy chained to branch selector (Heat Recovery system), then daisy chained to each indoor unit in the system and terminating at the farthest 374
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HVAC Replacement 238129 - 16 Variable Refrigerant Volume HVAC System indoor unit. The termination of the wiring shall be non-polar. The remote control wiring shall run from the indoor unit control terminal block to the remote controller connected with that indoor unit.
C. Wiring size:
Wiring shall be non-shielded, 2-conductor sheathed vinyl cord or cable, and 18 AWG stranded copper wire.
1.03. VRV Controls Network
The VRV Controls Network is made up of local remote controllers, multi-zone controllers, advanced multi-zone controllers, and open protocol network devices that transmit information via the communication bus. The VRV Controls Network shall also have the ability to be accessed via a networked PC. The VRV Controls Network supports operation monitoring, scheduling, error email distribution, general user software, tenant billing, maintenance support, and integration with Building Management Systems (BMS) using open protocol via BACnet® interface, BACnet® MSTP adaptor, Lonworks® interface or Modbus® adapter; all of which blend to provide the optimal control strategy for the best HVAC comfort solution.
Part 2 - Products
2.01. Advanced Multi-zone Controllers
The Daikin AC VRV advanced multi-zone controllers are compatible with all VRV, SkyAir, and Daikin RA and FTXS indoor units with the use of the KRP928BB2S RA Adapter. The advanced multi-zone controller wiring consist of a non-polar two-wire connection to the outdoor unit. The advanced multi-zone controllers may be wall-mounted and can be adjusted to maintain the optimal operation of up to 64 connected indoor unit groups and 128 indoor units. Set temperatures can be adjusted in increments of 1°F. In the cases where a system or unit error may occur, the VRV controllers will display a two-digit error code and the unit address.
A. DCM601B71: intelligent Touch Manager (iTM) V2.XX.XX
The intelligent Touch Manager (version 2.10) shall provide control for all VRV, SkyAir, and Daikin RA and FTXS indoor units with the use of the KRP928BB2S RA Adapter. It shall be capable of controlling a maximum or 64 indoor unit groups and 128 indoor units connected to a maximum of 10 outdoor units. The intelligent Touch Manager shall support operations superseding that of the local remote controller, system configuration, daily/weekly scheduling, monitoring of operation status, and malfunction monitoring.
The controller wiring shall consist of a non-polar two-wire connection to the indoor unit at terminals F1F2 (out-out) of the outdoor unit. The intelligent Touch Manager is wall mounted and can be adjusted to maintain the optimal operation of the connected indoor unit(s).
The intelligent Touch Manager can be used in conjunction with the BRC1E73 (Navigation Remote Controller), the BRC1H71W (Madoka Remote Controller), or the BRC4C82/7E83/7C812/7E818 (Wireless Remote Controller), BACnet interface, BACnet MSTP adaptor, Lonworks interface, and Modbus adapter to control the same indoor unit groups. The remote controller shall require daisy chain wiring for grouping multiple indoor units (up to 16) together. Manual addressing is required 375
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HVAC Replacement 238129 - 17 Variable Refrigerant Volume HVAC System of each remote controller group associated with the intelligent Touch Manager. DIII-NET address can be set for one (1) indoor unit or each indoor unit in the remote controller group. No more than 2 remote controllers can be placed in the same group.
The intelligent Touch Manager shall be equipped with two RJ-45 Ethernet ports for 100 Mbps network communication to support interconnection with a network PC via the Internet, Local Area Network (LAN), or connection with a non-networked PC after completed installation.
Web access functions shall be available so that facility staff can securely log into each Intelligent Touch Manager via the PC’s web browser to support monitoring, scheduling, error recognition, downloading of system operation data (trend log (refer to pints list under BACnet server)) and general user functions. Error emails are also sent to designated email addresses. An additional software options, such as, Power Proportional Distribution (PPD) tenant billing, BACnet Server Gateway, BACnet Client, and web (HTTP) Interface software shall also be available. The optional software shall require advanced purchase and can only be activated upon receipt of a license activation key from Daikin Technical Support.
1. Mounting:
The intelligent Touch Manager shall be mounted on the wall or into the mounting fixtures included with the intelligent Touch Manager.
2. Display Features:
a. The intelligent Touch Manager shall be approximately 11.42” x 9.57” x 1.97’ in size with a backlit 10.4” LCD display.
b. Display information shall be selectable from English, French, Italian, Korean, Dutch, Portuguese, Chinese, Japanese, German, or Spanish.
c. Featured backlit LCD with auto off after 30 minutes (default) is adjustable between 1 to 60 minutes, or the choice of 3 different screen savers.
d. Area and Group configuration
1) Area contains one (1) or more Area(s) or Group(s)
2) A Group may be an indoor unit, Di, Dio point that has a DIII-NET address 3) A Group may be an external management point such as a Di, Do, Bi, Bo, Bv, Ai, Ao, Av, Mi, Mo, Mv that does not have a DIII-NET address
e. An Area is a tiered group where management points (indoor unit, digital input/output, and analog input/output groups) can be monitored and controlled by global settings. Up to 650 Areas can be created. Area hierarchy can have up to 10 tiered levels (ex. top level: 1st floor West, 2nd level: offices, hallways, 3rd level: Office 101, 102, and 103, etc.). Area configuration shall classify levels of monitoring and control for each management point 1) Areas and Groups may be assigned names (ex. Office 101, Lobby, North Hallway, etc.) f. The Controller shall display On/Off, Operation Mode, Setpoint, Space Temperature, Louver Position, Fan Speed for each Area or Group.
g. The Controller shall display Date (mm/dd/yyyy, yyyy/mm/dd, or dd/mm/yyyy format selectable) and day of the week along with the time of day (12hr or 24hr display selectable).
h. The Controller shall adjust for daylight savings time (DST) automatically. 376
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HVAC Replacement 238129 - 18 Variable Refrigerant Volume HVAC System i. Display information shall be updated every 3 seconds to show the latest status of the indoor unit groups.
j. System status icons shall display On/Off (color coded), Malfunction/Error (color coded), Forced Stop, Setback, Filter, Maintenance, and Screen Lock. k. The controller shall display the temperature setpoint in one degree increments with a range of 60oF – 90oF, 1oF basis (16oC – 32oC, 0.1oC basis).
1) Display of temperature setpoint information shall be configurable for Fahrenheit or Celsius
l. Display shall reflect room temperature in one tenth degree increments with a range of-58oF – 248oF, 0.1oF basis (-50oC – 120oC, 0.1oC basis) with 0.1oC accuracy. 1) Display of room temperature information shall be configurable for Fahrenheit or Celsius m. The Menu List shall be used to configure options and display information for each Area or Group.
n. Error status shall be displayed in the event of system abnormality/error with one of three color coded icons placed over the indoor unit icon or lower task bar. 1) System errors are generated when the intelligent Touch Manager system with other VRV controls systems are combined incorrectly or power proportional distribution calculation errors occur. The intelligent Touch Manager shall display the error with a red triangle placed on the lower task bar.
2) Unit errors occurring within the VRV system shall be displayed with a yellow triangle placed over the indoor unit icon
3) Limit errors are based upon preconfigured analog input upper and lower limit settings and are generated when the limits have been met. When limit error is generated a yellow triangle will be placed over the unit icon.
4) Communication errors between the intelligent Touch Manager and the indoor units shall be displayed with a blue triangle placed over the indoor unit icon 5) Error history shall be available for viewing for up to 500,000 errors/abnormality events with operation events.
o. Layout View
1) Capable of displaying site floor plan or graphical user interface (GUI) as the background for visual navigation. Indoor unit, DIII-Net Di and Dio, and External Di, Do, Ai, Ao, Av, Mi, Mo, Mv icons with operational status can be placed on the floor layout or GUI
i) Up to 4 status points can be assigned to the indoor unit icon (room name, room temperature, setpoint, and mode)
ii) Digital input and output icons will display On/Off status iii) Analog icons will display Ai, Ao and Av.
iv) Multistate icons will display Mi, Mo and Mv.
2) Up to 60 floor layout sections can be created
3. Basic Operation:
a. Capable of controlling by Area(s) or Group(s)
b. Controller shall control the following group operations:
1) On/Off
2) Operation Mode (Cool, Heat, Fan, Dry, and Auto)
3) Independent Cool and Heat dual Setpoints or single Setpoint for current mode in the occupied period
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HVAC Replacement 238129 - 19 Variable Refrigerant Volume HVAC System 4) Controller shall be able to limit the user adjustable setpoint ranges individually for cooling and heating based upon the Area or Group configurations 5) Independent Setup (Cooling) and Setback (Heating) setpoints in the unoccupied mode adjustable to 50 - 950F
i) Setup and Setback setpoints can only be set outside of the occupied setpoint range
ii) The Setup and Setback setpoints will automatically maintain a 2oF fixed differential from the highest possible occupied setpoints
iii) The recovery differential shall be 40F (default) and adjustable between 2 – 100F iv) Settings shall be applied based upon the Area or Group configurations 6) Fan Speed
i) Up to 3 speeds (dependent upon indoor unit type)
7) Airflow direction (dependent upon indoor unit type)
i) 5 fixed positions or oscillating
8) Remote controller permit/prohibit of On/Off, Mode, and Setpoint 9) Lock out setting for Intelligent Touch Manager display 10) Indoor unit Group/Area assignment
c. Capable of providing battery backup power for the clock at least 1 year when no AC power is applied.
1) The battery can last at least 13 years when AC power is applied 2) Settings stored in non-volatile memory
d. Capable of controlling the Low Temperature Hydrobox
1) On/Off
2) Leaving water cooling setpoint
3) Leaving water heating setpoint
4. Programmability:
a. Controller shall support weekly schedule settings.
1) 7 day weekly pattern (7)
2) Weekday + Weekend (5 + 2)
3) Weekday + Saturday + Sunday (5 + 1 + 1)
4) Everyday (1)
5) The schedule shall have the capabilities of being enabled or disabled 6) 100 independent schedules configurable with up to 20 events settable for each days schedule
i) Each scheduled event shall specify time and target Area or Group ii) Each scheduled event shall include On/Off, Optimum Start, Operation Mode, Occupied Setpoints, Setback Setpoints, Remote Controller On/Off Prohibit, Remote Controller Mode Prohibit, Remote Controller Setpoint Prohibit, Timer Extension Setting, Fan Speed, and Setpoint Range Limit
• Setpoint when unit is On (occupied)
• Configurable Setup (Cooling) and Setback (Heating) setpoints when unit is Off (unoccupied)
iii) Time setting in 1-minute increments
iv) Timer Extension shall be used for a timed override (settable from 30 – 180 minutes) to allow indoor unit operation during the unoccupied period 378
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HVAC Replacement 238129 - 20 Variable Refrigerant Volume HVAC System 7) A maximum of 40 exception days can be schedule on the yearly schedule (repeats yearly)
i) Exception days shall be used to override specified days on the weekly schedule based upon irregular occupied/unoccupied conditions
ii) Exception days can be configured on a set date (Jan 1) or floating date (1st Monday in September)
8) The schedule shall have the capability of limiting the capacity demand of the outdoor unit’s compressor by 0%, 40%, 70% or 100%
9) The schedule shall have the capability to enable/disable the outdoor unit low noise operation
b. Controller shall support auto-changeover.
1) Auto-change shall provide Fixed (default), Individual, Averaging, and Vote changeover methods for both Heat Pump and Heat Recovery systems based upon the changeover group configuration. This will allow for the optimal room temperature to be maintained by automatically switching the indoor unit’s mode between Cool and Heat in accordance with the room temperature and setpoint. The following changeover scheme shall be applicable to the Fixed, Individual, and Averaging methods. i) Changeover to cooling mode shall occur at cooling setpoint + 1oF (0.5oC) as the primary changeover deadband and takes the guard timer into consideration • Configurable from 1 – 4oF (0.5 – 2oC)
ii) Changeover to cooling mode shall occur at the primary changeover deadband to cooling + 1oF (0.5oC) as the secondary changeover deadband. • Configurable from 1 – 4oF (0.5 – 2oC)
iii) Changeover to heating mode shall occur at heating setpoint - 1oF (0.5oC) as the primary changeover deadband and takes the guard timer into consideration • Configurable from 1 – 4oF (0.5 – 2oC)
iv) Changeover to heating mode shall occur at the primary changeover deadband to heating - 1oF (0.5oC) as the secondary changeover deadband. • Configurable from 1 – 4oF (0.5 – 2oC)
v) A weighted demand shall be configurable for the Averaging and Vote methods. 2) Fixed Method
i) Changeover evaluated by room temperature and setpoint of the representative indoor unit (first registered indoor unit in changeover group) in the changeover group even when it is not operating (must be in Cool, Heat, or Auto mode) ii) Changeover affects all indoor unit groups in the changeover group. 3) Individual method (recommended for Heat Recovery Systems) i) Changeover evaluated by room temperature and setpoints of the individual indoor unit group in the changeover group
ii) Changeover affects individual indoor unit group in the changeover group 4) Average method
i) Changeover evaluated by the average of all indoor unit group’s room temperatures and setpoints operating in Cool, Heat, or Auto mode in the changeover group list ii) If none of the indoor units in the group meet the above requirements the Fixed method of changeover will be applied
iii) A weighted demand (0 – 3) can be configured for each indoor unit in the changeover group.
iv) Changeover affects all indoor unit groups in the changeover group. 5) Vote Method
i) In each indoor unit, the cooling demand is calculated based upon the difference between the room temperature and cooling setpoint. If the room temperature falls below the primary cool changeover point (cool setpoint plus the primary 379
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HVAC Replacement 238129 - 21 Variable Refrigerant Volume HVAC System changeover deadband) the cooling demand is considered as 0 (zero). Then the total cooling demand is calculated as the sum of each indoor unit’s cooling demand ii) The opposite is true for the total heating demand
iii) A weight (0-3) can be added to each indoor unit’s demand in the changeover group. The default setting is 1
iv) The weight 0 (zero) means the indoor unit’s demand is not added in the total demand, so the indoor unit’s demand is considered to be 0 (zero) v) The weight 2 or 3 means the indoor unit’s demand is added 2 or 3 times in the total demand, respectively
vi) Changeover to cooling mode shall occur when the total cooling demand is greater than the total heating demand.
vii) The opposite is true for changeover to heating
viii)Vote supports a Heating Override option, which prioritizes switching to the heating mode if at least one room temperature falls below the secondary heat changeover point (heat setpoint minus the secondary changeover deadband) even if the total cooling demand is greater than the total heating demand. ix) Changeover affects all indoor unit groups in the changeover group. 6) Changeover shall change the operation mode of the indoor unit that is set as the Changeover Master. The Changeover Master indoor unit shall then change the operation mode of all indoor unit groups daisy chained to the same outdoor unit in the Heat Pump system or branch selector box in the Heat Recovery system. 7) Guard timer
i) Upon changeover, guard timer will prevent another changeover during the guard timer activation period (15, 30, 60 (default) min).
ii) Guard timer is ignored by a change of setpoint manually from either intelligent Touch Manger or Remote Controller, by schedule, or the room temperature meets or exceeds the secondary changeover deadband of the mode opposite of the current mode setting
c. Controller shall support Interlock
1) Interlock feature for use with 3rd party equipment (DOAS, dampers, occupancy sensing, etc…) to automatically control Groups or Areas corresponding to the change of the operation states or the On/Off states of any Group.
2) WAGO I/O unit – Di, Do, Ai, Ao
i) On/Off based monitoring and control of equipment
ii) Manual or scheduled operation of equipment
iii) Operation based upon interlock with management points (group(s)) iv) Monitor equipment error/alarm status
v) WAGO I/O operation data for every minute in the last 5 days are stored and can be downloaded from Web access or USB
d. Controller shall support force shutdown of associated indoor unit groups.
5. Web/Email Function
a.Each intelligent Touch Manager shall be capable of monitoring, operating, and scheduling a maximum of 64 indoor unit groups (up to 512 indoor unit groups with the addition of the iTM Plus Adapter) from a networked PC’s web browser. It shall also be capable of creating general user access and sending detailed error emails to a customized distribution list (up to 10 email addresses).
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HVAC Replacement 238129 - 22 Variable Refrigerant Volume HVAC System b.All PCs shall be field supplied
c.The following operation data stored in iTM every minute for the last 5 days can be accessed and downloaded through ITM web function:
1) Indoor and outdoor unit (applied model only) operation data. 2) BACnet Client management data points (AI, AO, AV, BI, BO, BV, MI, MO and MV). 3) WAGO IO system data points (External DI, DIO, PI, AI and AO).
6. Operational Data History
a. Operation data are stored in the iTM every minute for the last 5 days:
1) VRV indoor and outdoor unit (if supported) operation data. 2) BACnet Client management data points (AI, AO, AV, BI, BO, BV, MI, MO and MV). 3) WAGO IO system data points (External DI, DIO, PI, AI and AO). b. The operation data can be exported through the iTM web function or USB output with a user specified time period.
c. Airnet addressing required for both indoor units and outdoor units to enable the operation data on the iTM.
7. Demand limiting
a. Interlock the digital input signals to provide the following automatic demand control functions 1) Indoor unit set-point shift control
i) Upper limit of cooling 84oF
ii) Lower limit of heating 64oF
2) Indoor unit forced thermo-off
3) Indoor unit on/off control
4) Outdoor unit’s capacity demand limit control 0, 40, 70,100%
8. Optional Software
Licensed per option, per intelligent Touch Manager shall be required. a.DCM002A71: Power Proportional Distribution (PPD)
The tenant billing option shall be capable of calculating VRV Controls Network equipment energy usage in kWh based on the energy consumption of the outdoor unit(s) divided among the associated indoor units. This software is used in conjunction with the intelligent Touch Manager and a Watt Hour Meter (WHM). A maximum of 3 Watt Hour Meters can be connected to the intelligent Touch Manager. Up to 4 additional Watt Hour Meters can be connected to each iTM Plus Adapter, and up to 7 iTM Plus Adapters can be connected to the intelligent Touch Manager.
The Power Proportional Distribution results data can be saved to a USB flash drive, or on a PC with the use of the web access. Data is saved in the CSV format. Results can be stored up to 13 months in the intelligent Touch Manager. b. DCM007A51: iTM Web (HTTP) Interface Software
1) The iTM Web (HTTP) interface option shall be capable of exposing indoor unit management points as data objects to the BMS via HTTP protocol. 381
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HVAC Replacement 238129 - 23 Variable Refrigerant Volume HVAC System 2) The Web (HTTP) interface option shall support VRV, SkyAir, Outdoor Air Processing Unit, Mini-Split system with use of KRP928, and FFQ indoor unit for Multi-split system.
3) The BMS shall monitor and control the following objects via HTTP protocol i. Normal/Error monitor
ii. On/Off
iii. Operation Mode
iv. Setpoint
v. Room Temp
vi. Fan Speed
vii. Louver Direction
viii. Ventilation Mode
ix. Ventilation Amount
c.DCM009A51: BACnet Client Option
1) The iTM BACnet Client Option shall be capable of making the intelligent Touch Manager work as a BACnet client using the BACnet/IP protocol. A BACnet client machine is able to send service requests to a BACnet server machine that then performs the services and reports the results to the client. By registering equipment and sensors connected to a BACnet server as management points, equipment and sensors can be monitored and controlled by the intelligent Touch Manager. The BACnet Client option must be enabled/ activated in each intelligent Touch Manager to be used.
2) System Capacity
i) A maximum of 50 BACnet servers can be monitored and/or controlled by one intelligent Touch Manager.
ii) A maximum of 1536 objects can be monitored and/or controlled by one intelligent Touch Manager.
iii) A maximum of 512 management points, including BACnet management points, external management points, internal Ai management points, AHU management points, and Chiller management points, can be registered in one intelligent Touch Manager.
3) Objects that can be used in BACnet management points are:
i) Analog Input (Object Type Number 0)
ii) Analog Output (Object Type Number 1)
iii) Analog Value (Object Type Number 2)
iv) Binary Input (Object Type Number 3)
v) Binary Output (Object Type Number 4)
vi) Binary Value (Object Type Number 5)
vii) Multi-Sate Input (Object Type Number 13)
viii)Multi-Sate Output (Object Type Number 14)
ix) Multi-Sate Value (Object Type Number 19)
d.DCM014A51: BACnet Server Gateway Option
4) The iTM BACnet Server Gateway Option shall be capable of making the intelligent Touch Manager work as a BACnet gateway using the BACnet/IP protocol. The iTM BACnet Server Gateway Option shall be capable of exposing indoor unit management points and indoor/outdoor unit operation data as BACnet objects to the BMS. The iTM BACnet Server/Gateway Option shall be capable of allowing the BMS to monitor and/or control indoor units and outdoor units via BACnet objects. 382
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HVAC Replacement 238129 - 24 Variable Refrigerant Volume HVAC System 5) The iTM BACnet Server Gateway Option shall support VRV, SkyAir, Outdoor Air Processing Unit, Mini-Split system with use of KRP928, and FFQ indoor unit for Multisplit system. 6) The iTM BACnet Server Gateway Option shall support operation data for VRV IDUs only (requires Airnet addressing)
7) The iTM BACnet Server Gateway Option shall support operation data for the following VRV outdoor units:
VRV III S RXYMQ_PVJU
VRV IV S RXTQ_TAVJU
VRV LIFE RXSQ_TAVJU
VRV III
RXYQ_PBTJ, RXYQ_PBYD, RXYQ_TTJU, REYQ_PATJ,
REYQ_PBTJ, REYQ_PBYD, REYQ_PCTJ, REYQ_PCYD,
RWEYQ_PTJU and RWEYQ_PYDN
VRV
AURORA
RXLQ_TATJU, RXLQ_TAYDU, RXLQ_TAYCU,
RELQ_TATJU,
RELQ_TAYDU and RELQ_TAYCU
VRV IV X
REYQ_XATJU, REYQ_XAYDU, REYQ_XAYCU,
RXYQ_XATJA,
RXYQ_XAYDA, REYQ_XATJA, REYQ_XAYDA,
REYQ_XAYCA
VRV T RWEQ_TATJU, RWEQ_TAYDU, RWEQ_TAYCU
VRV IV RXYQ_TAYCU, RXYQ_TYDN, RWEYQ_PCYD
VRV
Emerion
HR
REYQ_AA
8) Functions:
i. The iTM BACnet Server Gateway Option shall be capable of supporting Change of Value (COV) notification.
ii. The iTM BACnet Server Gateway Option shall communicate to BMS using port number 47808 (configurable).
iii. The iTM BACnet Server Gateway Option shall function as BACnet router to provide unique virtual BACnet device identification number (ID) for every indoor unit group address and every outdoor unit device. iv. The iTM BACnet Server Gateway Option shall provide configurable BACnet Network number.
v. The iTM BACnet Server Gateway Option shall be capable of being configured as a foreign device. It shall be capable of communicating across BACnet Broadcast Management Devices (BBMD) in different subnet networks.
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HVAC Replacement 238129 - 25 Variable Refrigerant Volume HVAC System vi. The iTM BACnet Server Gateway Option shall be run in environments with BACnet communication traffic up to 100 packets/second.
vii. The iTM BACnet Server Gateway Option functions shall be configurable through CSV file which shall be downloaded from iTM and configured by trained personnel.
9) System Capacity
i. A maximum of 128 device IDs (including indoor units groups outdoor units) and a maximum of 4000 BACnet objects can be monitored and/or controlled from a BMS
ii. Max of 8 DIII-Net ports shall be connected to iTM.
10) The Building Management System shall monitor and control the following BACnet objects for indoor units
i. Indoor unit ON/OFF status.
ii. Alarm status with error description
iii. Room temperature.
iv. Indoor Unit ON details
• Off
• Normal [ON]
• Override
• Setback
v. Filter sign status.
vi. Fan status.
vii. Communication status.
viii. Thermo-on status.
ix. Compressor status
• On
• Off
• Defrost
x. Aux heater status.
xi. Occupancy Mode
• Unoccupied,
• Occupied
• Standby
xii. Operation Mode (Cool, Heat, Fan, and Dry)
xiii. Cooling and Heating setpoints during occupied mode. xiv. Cooling and Heating setpoints during unoccupied mode. xv. Maximum and minimum cooling setpoint.
xvi. Maximum and Minimum heating setpoint
xvii. Minimum cooling and heating setpoint differential. xviii. Fan Speed
• Up to 3 speeds (dependent upon indoor unit type)
xix. Vane direction (dependent upon indoor unit type)
• 5 fixed positions or swing position
xx. Remote controller permit/prohibit
• On/Off
• Mode,
• Setpoint
xxi. Filter sign reset for indoor units
xxii. Forced indoor units off.
xxiii. Return air temperature
xxiv. Discharge air temperature
xxv. Liquid pipe temperature
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HVAC Replacement 238129 - 26 Variable Refrigerant Volume HVAC System xxvi. Gas pipe temperature
xxvii. EV position
xxviii. Freeze protection (For FXEQ_P, FXFQ_T, FXTQ_TA, FXUQ_P, FXZQ_TA, FXSQ_TA, CXTQ_TA indoor unit only).
11) The Building Management System shall monitor the following BACnet objects (if available) for outdoor unit devices:
Point Name Point Description
Communication Status Monitors and displays the communication status (General)
Operation Mode Monitors and displays the operation mode (Cool, Heat, Fan or Heat &Cool) (General)
Outdoor Unit Alarm
Status
Monitors whether or not the outdoor unit is operating
normally. (General)
Defrost Mode Monitors if the defrost mode is active. (General) Oil Return Mode Monitors whether or not the outdoor unit is in oil return operation. (General)
Electric Power Monitors and displays the electric power (calculated). (General)
Electric Current Monitors and displays the electric current (calculated). (General)
System Capacity Code Monitors and displays the system capacity code. (General)
Outdoor Air
Temperature
Monitors and displays the outdoor air temperature.
(General)
M_Condensing
Pressure
Monitors and displays the condensing pressure
(Master Module)
M_Evaporating
Pressure
Monitors and displays the evaporating pressure
(Master Module)
M_Condensing
Temperature
Monitors and displays the condensing temperature
(Master Module)
M_Evaporating
Temperature
Monitors and displays the evaporating temperature
(Master Module)
M_Inverter Compressor
1 Speed
Monitors and displays the speed of the inverter
compressor1 (Master Module)
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HVAC Replacement 238129 - 27 Variable Refrigerant Volume HVAC System Point Name Point Description
M_Inverter Compressor
2 Speed
Monitors and displays the speed of the inverter
compressor2 (Master Module)
M_Fan Step Monitors and displays the fan step (Master Module) M_EV Position 1 Monitors and displays the position of the expansion valve1 (Master Module)
M_EV position 2 Monitors and displays the position of the expansion valve2 (Master Module)
M_Hot Gas
Temperature
(Compressor 1)
Monitors and displays the hot gas temperature of the
compressor1 (Master Module)
M_Hot Gas
Temperature
(Compressor 2)
Monitors and displays the hot gas temperature of the
compressor2 (Master Module)
M_Liquid Pipe
Temperature
Monitors and displays the liquid pipe temperature
(Master Module)
M_Liquid Pipe
Temperature (HX
Upper)
Monitors and displays the liquid pipe temperature for
the upper HX (Master Module)
M_Liquid Pipe
Temperature (HX
Lower)
Monitors and displays the liquid pipe temperature for
the lower HX (Master Module)
M_Liquid Pipe
Temperature (De-Icer)
Monitors and displays the liquid pipe temperature for
the de-icer (Master Module)
M_Gas Pipe
Temperature (HX
Upper)
Monitors and displays the gas pipe temperature for
the upper HX (Master Module)
M_Gas Pipe
Temperature (HX
Lower)
Monitors and displays the gas pipe temperature for
the lower HX (Master Module)
M_Suction
Temperature
Monitors and displays the suction temperature
(Master Module)
M_Compressor Suction
Temperature
Monitors and displays the compressor’s suction
temperature (Master Module)
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HVAC Replacement 238129 - 28 Variable Refrigerant Volume HVAC System Point Name Point Description
M_Subcool Inlet
Temperature
Monitors and displays the subcool inlet temperature
(Master Module)
M_Subcool Outlet
temperature
Monitors and displays the subcool outlet temperature
(Master Module)
M_Subcool EV Position Monitors and displays the subcool expansion valve position (Master Module)
S1_Condensing
Pressure
Monitors and displays the condensing pressure (Sub
Module1)
S1_Evaporating
Pressure
Monitors and displays the evaporating pressure (Sub
Module1)
S1_Condensing
Temperature
Monitors and displays the condensing temperature
(Sub Module1)
S1_Evaporating
Temperature
Monitors and displays the evaporating temperature
(Sub Module1)
S1_Inverter
Compressor 1 Speed
Monitors and displays the speed of the inverter
compressor1 (Sub Module1)
S1_Inverter
Compressor 2 Speed
Monitors and displays the speed of the inverter
compressor2 (Sub Module1)
S1_Fan Step Monitors and displays the fan step (Sub Module1) S1_EV Position 1 Monitors and displays the position of the expansion valve1 (Sub Module1)
S1_EV position 2 Monitors and displays the position of the expansion valve2 (Sub Module1)
S1_Hot Gas
Temperature
(Compressor 1)
Monitors and displays the hot gas temperature of the
compressor1 (Sub Module1)
S1_Hot Gas
Temperature
(Compressor 2)
Monitors and displays the hot gas temperature of the
compressor2 (Sub Module1)
S1_Liquid Pipe
Temperature
Monitors and displays the liquid pipe temperature
(Sub Module1)
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HVAC Replacement 238129 - 29 Variable Refrigerant Volume HVAC System Point Name Point Description
S1_Liquid Pipe
Temperature (HX
Upper)
Monitors and displays the liquid pipe temperature for
the upper HX (Sub Module1)
S1_Liquid Pipe
Temperature (HX
Lower)
Monitors and displays the liquid pipe temperature for
the lower HX (Sub Module1)
S1_Liquid Pipe
Temperature (De-Icer)
Monitors and displays the liquid pipe temperature for
the de-icer (Sub Module1)
S1_Gas Pipe
Temperature (HX
Upper)
Monitors and displays the gas pipe temperature for
the upper HX (Sub Module1)
S1_Gas Pipe
Temperature (HX
Lower)
Monitors and displays the gas pipe temperature for
the lower HX(Sub Module1)
S1_Suction
Temperature
Monitors and displays the suction temperature (Sub
Module1)
S1_Compressor
Suction Temperature
Monitors and displays the compressor’s suction
temperature (Sub Module1)
S1_Subcool Inlet
Temperature
Monitors and displays the subcool inlet temperature
(Sub Module1)
S1_Subcool Outlet
temperature
Monitors and displays the subcool outlet temperature
(Sub Module1)
S1_Subcool EV
Position
Monitors and displays the subcool expansion valve
position (Sub Module1)
S2_Condensing
Pressure
Monitors and displays the condensing pressure (Sub
Module2)
S2_Evaporating
Pressure
Monitors and displays the evaporating pressure (Sub
Module2)
S2_Condensing
Temperature
Monitors and displays the condensing temperature
(Sub Module2)
S2_Evaporating
Temperature
Monitors and displays the evaporating temperature
(Sub Module2)
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HVAC Replacement 238129 - 30 Variable Refrigerant Volume HVAC System Point Name Point Description
S2_Inverter
Compressor 1 Speed
Monitors and displays the speed of the inverter
compressor1 (Sub Module2)
S2_Inverter
Compressor 2 Speed
Monitors and displays the speed of the inverter
compressor2 (Sub Module2)
S2_Fan Step Monitors and displays the fan step (Sub Module2) S2_EV Position 1 Monitors and displays the position of the expansion valve1 (Sub Module2)
S2_EV position 2 Monitors and displays the position of the expansion valve2 (Sub Module2)
S2_Hot Gas
Temperature
(Compressor 1)
Monitors and displays the hot gas temperature of the
compressor1 (Sub Module2)
S2_Hot Gas
Temperature
(Compressor 2)
Monitors and displays the hot gas temperature of the
compressor2 (Sub Module2)
S2_Liquid Pipe
Temperature
Monitors and displays the liquid pipe temperature
(Sub Module2)
S2_Liquid Pipe
Temperature (HX
Upper)
Monitors and displays the liquid pipe temperature for
the upper HX (Sub Module2)
S2_Liquid Pipe
Temperature (HX
Lower)
Monitors and displays the liquid pipe temperature for
the lower HX (Sub Module2)
S2_Liquid Pipe
Temperature (De-Icer)
Monitors and displays the liquid pipe temperature for
the de-icer (Sub Module2)
S2_Gas Pipe
Temperature (HX
Upper)
Monitors and displays the gas pipe temperature for
the upper HX (Sub Module2)
S2_Gas Pipe
Temperature (HX
Lower)
Monitors and displays the gas pipe temperature for
the lower HX(Sub Module2)
S2_Suction
Temperature
Monitors and displays the suction temperature (Sub
Module2)
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HVAC Replacement 238129 - 31 Variable Refrigerant Volume HVAC System Point Name Point Description
S2_Compressor
Suction Temperature
Monitors and displays the compressor’s suction
temperature (Sub Module2)
S2_Subcool Inlet
Temperature
Monitors and displays the subcool inlet temperature
(Sub Module2)
S2_Subcool Outlet
temperature
Monitors and displays the subcool outlet temperature
(Sub Module2)
S2_Subcool EV
Position
Monitors and displays the subcool expansion valve
position (Sub Module2)
12) The Building Management System may choose to monitor and control the following BACnet objects linked to iTM control logic:
i. Enable/Disable iTM Schedule operation.
ii. Enable/Disable iTM Auto Changeover Operation.
iii. Set Timed Override Minutes.
• Monitor and configure timer extension on iTM (30, 60, 90, 120, 150, 180 minutes)
iv. System forced off
• Enable/Disable all emergency stop programs that are registered on the iTM.
13) Schedule
The BMS shall utilize iTM schedule function or support weekly schedule settings through its programming.
i. BMS schedule shall support the indoor unit:
• Each scheduled event shall specify time and target group address. • Each scheduled event shall include Occupancy Mode, Operation Mode, Occupied Cooling Setpoint, Occupied Heating Setpoint, and Unoccupied cooling setpoint, Unoccupied heating setpoint, Remote Controller On/Off Permit/Prohibit, Remote Controller Mode Permit/Prohibit, Remote Controller Setpoint Permit/Prohibit, and Timed Override Enable.
• An override shall be provided for use enabling indoor unit operation during the unoccupied period by the BMS programming.
14) Auto Changeover
The BMS shall utilize iTM Auto changeover function or support auto-changeover through its programming.
i. Auto-change shall provide changeover for both Heat Pump and Heat Recovery systems based upon the group configurations. This will allow the optimal room temperature to be maintained by automatically switching the indoor unit’s mode between Cool and Heat in accordance with the room temperature and setpoint temperature.
ii. Changeover shall change the operation mode of the indoor unit that is set as the Changeover Master. The Changeover Master indoor unit shall then 390
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HVAC Replacement 238129 - 32 Variable Refrigerant Volume HVAC System change the operation mode of all indoor unit groups daisy chained on the same DIII-Net communication bus to the same outdoor unit in the Heat Pump system or the same branch selector box in the Heat Recovery system. iii. Changeover to cooling mode shall occur when the room temperature is great than or equal to the cooling setpoint
• Differential to be determined by BACnet building management system programming
iv. Changeover to heating mode shall occur when room temperature is less than or equal to the heating setpoint.
• Differential to be determined by BACnet building management system programming
v. Guard timer
• Upon changeover, guard timer will prevent another changeover during this period.
• Guard timer should be ignored by a change of setpoint manually from the BMS, Intelligent Touch Controller, Remote Controller, or by schedule.
Guard timer to be configured by BMS programming (30 minute minimum recommended)
15) Setpoint limitation
The BMS shall utilize maximum and minimum cooling and heating setpoint to configure upper and lower setpoints range.
16) System shutdown:
BMS should utilize System forced off point to execute emergency stop program registered on the iTM.
17) Restricted functions:
The following iTM functions shall be prohibited when the BACnet Server Gateway option enabled:
i. Interlocking Control.
ii. Emergency Stop (Emergency stop manual release).
iii. Power Proportional Distribution (PPD) option.
iv. BACnet Client option.
v. D-Net Service.
vi. External Management Point Registration
B. DCM601A72: iTM Plus Adapter
The iTM Plus Adapter shall provide control for all VRV, SkyAir indoor units, and Daikin RA and FTXS indoor units with the use of the KRP928BB2S RA Adapter. It shall be capable of handling a maximum of 64 indoor unit groups and 128 indoor units connected to a maximum of 10 outdoor units. The iTM Plus Adapter is to be used in conjunction with intelligent Touch Manager. Up to 7 iTM Plus Adapters can be connected to a single intelligent Touch Manager. This combination will provide intelligent Touch Manager monitoring and control of up to 512 indoor unit groups, 1024 indoor units, and 80 outdoor units. The iTM Plus Adapter shall support operations superseding that of the local remote controller, system configuration, daily/weekly scheduling, monitoring of operation status, and malfunction monitoring.
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HVAC Replacement 238129 - 33 Variable Refrigerant Volume HVAC System The controller wiring shall consist of a non-polar two-wire connection to the outdoor unit at terminals F1F2 (out-out). The iTM Plus Adapter is wall mounted and is used in conjunction with the intelligent Touch Manager to maintain the optimal operation of the connected indoor unit(s).
The iTM Plus Adapter is connected to the intelligent Touch Manager via a polarity sensitive 18-2 AWG stranded non-shielded wire (field supplied).
The iTM Plus Adapter can be used in conjunction with the BRC1E73 (Navigation Remote Controller), the BRC1H71W (Madoka Remote Controller), or the BRC4C82/7E83/7C812/7E818 (Wireless Remote Controller), BACnet interface, BACnet MSTP adaptor, Lonworks interface and Modbus adapter to control the same indoor unit groups. No more than 2 remote controllers can be placed in the same group. The remote controller shall require daisy chain wiring for grouping multiple indoor units (up to 16) together. Manual addressing is required of each indoor unit group associated with the iTM Plus Adapter.
1. Mounting:
The iTM Plus Adapter can be mounted on the wall or in a standard enclosure (field supplied).
2. Features:
a. The iTM Plus Adapter shall be approximately 6.30” x 5.87” x 2.41” in size.
3. Basic Operation:
a. Control of all associated indoor unit groups shall be done via the connected intelligent Touch Manager.
4. Programmability:
a.Programming of all associated indoor unit groups shall be done via the connected intelligent Touch Manager.
PART 3 EXECUTION
*INSERT AS REQUIRED
END OF SECTION
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HVAC Replacement 238129 - 34 Variable Refrigerant Volume HVAC System
APPENDIX A
HVAC EQUIPMENT ALTERNATE (GENERAL INFORMATION)
1) The alternate equipment supplier shall provide to the bidding mechanical contractor a complete equipment data package.
a) This package shall include, but is not limited to, equipment capacities at the design condition, power requirements, indoor units CFM/static pressures, fan curves, installation requirements, and physical dimensions. Nominal performance data is not acceptable. b) The mechanical contractor shall request and receive the equipment data package 15 days prior to bid date and submit this package with the alternate bid. c) The mechanical contractor shall list the equipment supplier and submit the required data package with the bid detailing a complete comparison of the proposed alternate equipment to the specified equipment and the associated cost reduction of the alternate equipment. The contractor bids an alternate manufacturer with full knowledge that that manufactures product may not be acceptable or approved.
d) All equipment must have visible and permanent label clearly identifying the original manufacturer of the equipment. These labels shall have original manufacturer’s name and contact information and be located both inside and outside the equipment and on all equipment-related literature.
Submittals shall include the above statement as confirmation by supplier that all conditions are agreed to and complied to. Failure to comply with these requirements shall be sufficient cause for rejection of the submittal and product with no further consideration. 2) The alternate equipment supplier shall furnish a complete drawing package to the mechanical contractor 15 days prior to bid day for bidding and installation. a) The drawing format shall be .dxf or equivalent, on 30"x42" sheets. b) The HVAC and electrical series design documents will be made available in electronic format for use by the equipment supplier in preparing their drawings. c) The alternate equipment supplier shall prepare the following drawings:
i) XXX HVAC Floor Plan
ii) XXX HVAC Refrigerant Piping Plan
iii) XXX HVAC Refrigerant Piping/Controls Details
iv) XXX HVAC Details
v) XXX HVAC Schedules
d) The alternate equipment supplier shall draft all piping circuits, components, overall building control schematic, detailed control wiring diagrams, system details and schedules for their system. The drawings shall convey all requirements to successfully install the alternate equipment suppliers system.
e) Provide (2) drawing package sets plotted on 20 lb. vellum. Provide (1) drawing package in electronic format (.dxf files) on CD.
f) The submitted documents shall be complete system designs and show no less information than the HVAC equipment/controls contract bid documents.
3) The equipment supplier shall submit, as part of the equipment data package, condensing unit data sheets. Data sheets to include the following:
a) COOLING capacities at project design conditions:
i) Cooling (Btu/h)
ii) Cooling Input Power:
(1) Ducted (kW)
(2) Ductless (kW)
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HVAC Replacement 238129 - 35 Variable Refrigerant Volume HVAC System (3) Mixed (kW)
iii) Part Load IEER:
(1) Ducted
(2) Ductless
(3) Mixed
iv) Full Load EER:
(1) Ducted
(2) Ductless
(3) Mixed
b) HEATING capacities at project design conditions:
i) Heating (Btu/h)
ii) Heating Input Power:
(1) Ducted (kW)
(2) Ductless (kW)
(3) Mixed (kW)
iii) Full Load COP @ 47°F:
(1) Ducted
(2) Ductless
(3) Mixed
iv) Full Load COP @ 17°F:
(1) Ducted
(2) Ductless
(3) Mixed
c) The submitted capacity and efficiency performance must meet or exceed the listed performance on the schedule at the designed space conditions including de-rate factors for defrost if applicable and refrigerant piping losses.
i) OPERATING TEMPERATURE RANGE:
(1) Cooling
(2) Heating
ii) POWER SUPPLY:
(1) Maximum Circuit Amps (MCA)
(2) Maximum Overcurrent Protection Amps (MOP)
(3) Maximum Starting Current (MSC)
(4) Condenser Fan Motor
iii) REFRIGERANT:
(1) Refrigerant type and charge details including field charge for piping to ensure code compliance.
(2) Control of refrigerant temperature based on weather and load or alternative function. iv) UNIT DATA:
(1) Max. number of indoor units
(2) Sound pressure level at 3ft (dBA)
(3) Weight (lbs)
(4) Dimensions
(5) Demand limit function description
(6) Details on sequential start functionality
(7) Coil anticorrosion data
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HVAC Replacement 238129 - 36 Variable Refrigerant Volume HVAC System 4) The equipment supplier shall guarantee the performance of their system and all published data submitted. Performance shall be based on the design criteria below. a) Room Temperature (Cooling)
b) Room Temperature (Heating)
c) Ambient Temperature (Summer)
d) Ambient Temperature (Winter)
e) Defrost De-rate Factor
f) Refrigerant Piping Loss
5) The alternate equipment supplier shall submit with bid, indoor unit data sheets. Data sheets to include the following:
a) Capacities at project design conditions:
i) Cooling (Btu/h)
ii) Cooling Input Power (kW)
iii) Part Load IEER
iv) Full Load EER
v) Heating (Btu/h)
vi) Heating Input Power (kW)
vii) Full Load COP@47°F
viii) Full Load COP@17°F
ix) Air Flow (CFM)
b) External Static Pressure (ESP)
c) Electrical Data (MAC, MOP, MSC, RLA)
d) Weight (lbs)
e) Dimensions
6) The equipment supplier shall provide a certificate which states that the equipment has a minimum salt spray resistance of 1000 hours.
7) The equipment supplier shall submit the warranty certificate to the mechanical contractor. 395
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HVAC Replacement 260505 - 1 Selective Demolition for Electrical SECTION 260505
SELECTIVE DEMOLITION FOR ELECTRICAL
PART 1 GENERAL
1.01 SECTION INCLUDES
A. Electrical demolition.
PART 2 PRODUCTS
2.01 MATERIALS AND EQUIPMENT
A. Materials and equipment for patching and extending work: As specified in individual sections.
PART 3 EXECUTION
3.01 EXAMINATION
A. Verify that abandoned wiring and equipment serve only abandoned facilities.
B. Demolition drawings are based on casual field observation and existing record documents.
C. Beginning of demolition means installer accepts existing conditions.
3.02 PREPARATION
A. Disconnect electrical systems in walls, floors, and ceilings to be removed.
B. Provide temporary wiring and connections to maintain existing systems in service during construction. When work must be performed on energized equipment or circuits, use personnel experienced in such operations.
C. Existing Electrical Service: Maintain existing system in service until new system is complete and ready for service. Disable system only to make switchovers and connections. Minimize outage duration.
1. Obtain permission from Owner at least 24 hours before partially or completely disabling system.
D. Existing Fire Alarm System: Maintain existing system in service until new system is accepted.
Disable system only to make switchovers and connections. Minimize outage duration.
1. Notify Owner before partially or completely disabling system.
3.03 DEMOLITION AND EXTENSION OF EXISTING ELECTRICAL WORK A. Remove, relocate, and extend existing installations to accommodate new construction.
B. Remove abandoned wiring to source of supply.
C. Remove exposed abandoned conduit, including abandoned conduit above accessible ceiling finishes. Cut conduit flush with walls and floors, and patch surfaces.
D. Disconnect abandoned outlets and remove devices. Remove abandoned outlets if conduit servicing them is abandoned and removed. Provide blank cover for abandoned outlets that are not removed.
E. Repair adjacent construction and finishes damaged during demolition and extension work.
F. Maintain access to existing electrical installations that remain active. Modify installation or provide access panel as appropriate.
END OF SECTION 260505
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HVAC Replacement 260519 - 1 Low-Voltage Electrical PowerConductors and Cables SECTION 260519
LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES
PART 1 GENERAL
1.01 SECTION INCLUDES
A. Single conductor building wire.
B. Wiring connectors.
C. Electrical tape.
D. Oxide inhibiting compound.
E. Wire pulling lubricant.
F. Cable ties.
G. Firestop sleeves.
1.02 RELATED REQUIREMENTS
A. Section 078400 - Firestopping.
1.03 REFERENCE STANDARDS
A. ASTM B3 - Standard Specification for Soft or Annealed Copper Wire 2013 (Reapproved 2018).
B. ASTM B8 - Standard Specification for Concentric-Lay-Stranded Copper Conductors, Hard, Medium-Hard, or Soft 2011 (Reapproved 2017).
C. ASTM B33 - Standard Specification for Tin-Coated Soft or Annealed Copper Wire for Electrical Purposes 2010, with Editorial Revision (2020).
D. ASTM B787/B787M - Standard Specification for 19 Wire Combination Unilay-Stranded Copper Conductors for Subsequent Insulation 2004 (Reapproved 2020).
E. ASTM D3005 - Standard Specification for Low-Temperature Resistant Vinyl Chloride Plastic Pressure-Sensitive Electrical Insulating Tape 2017.
F. NECA 1 - Standard for Good Workmanship in Electrical Construction 2015.
G. NEMA WC 70 - Power Cables Rated 2000 Volts or Less for the Distribution of Electrical Energy 2021.
H. NETA ATS - Standard For Acceptance Testing Specifications For Electrical Power Equipment And Systems 2021.
I. NFPA 70 - National Electrical Code Most Recent Edition Adopted by Authority Having Jurisdiction, Including All Applicable Amendments and Supplements.
J. UL 44 - Thermoset-Insulated Wires and Cables Current Edition, Including All Revisions.
K. UL 83 - Thermoplastic-Insulated Wires and Cables Current Edition, Including All Revisions.
L. UL 267 - Outline of Investigation for Wire-Pulling Compounds Most Recent Edition, Including All Revisions.
M. UL 486A-486B - Wire Connectors Current Edition, Including All Revisions.
N. UL 486C - Splicing Wire Connectors Current Edition, Including All Revisions.
O. UL 510 - Polyvinyl Chloride, Polyethylene, and Rubber Insulating Tape Current Edition, Including All Revisions.
1.04 SUBMITTALS
A. See Section 013000 - Administrative Requirements, for submittal procedures.
B. Product Data: Provide manufacturer's standard catalog pages and data sheets for conductors and cables, including detailed information on materials, construction, ratings, listings, and available sizes, configurations, and stranding.
C. Field Quality Control Test Reports.
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1.05 QUALITY ASSURANCE
A. Comply with requirements of NFPA 70.
PART 2 PRODUCTS
2.01 CONDUCTOR AND CABLE GENERAL REQUIREMENTS
A. Provide products that comply with requirements of NFPA 70.
B. Provide products listed, classified, and labeled as suitable for the purpose intended.
C. Unless specifically indicated to be excluded, provide all required conduit, boxes, wiring, connectors, etc. as required for a complete operating system.
D. Comply with NEMA WC 70.
E. Thermoplastic-Insulated Conductors and Cables: Listed and labeled as complying with UL 83.
F. Thermoset-Insulated Conductors and Cables: Listed and labeled as complying with UL 44.
G. Conductor Material:
1. Copper Conductors: Soft drawn annealed, 98 percent conductivity, uncoated copper conductors complying with ASTM B3, ASTM B8, or ASTM B787/B787M unless otherwise indicated.
2. Tinned Copper Conductors: Comply with ASTM B33.
H. Conductor Color Coding:
1. Color code conductors as indicated unless otherwise required by the authority having jurisdiction. Maintain consistent color coding throughout project.
2. Color Coding Method: Integrally colored insulation.
3. Color Code:
a. 480Y/277 V, 3 Phase, 4 Wire System:
1) Phase A: Brown.
2) Phase B: Orange.
3) Phase C: Yellow.
4) Neutral/Grounded: Gray.
b. 208Y/120 V, 3 Phase, 4 Wire System:
1) Phase A: Black.
2) Phase B: Red.
3) Phase C: Blue.
4) Neutral/Grounded: White.
c. 240/120 V, 1 Phase, 3 Wire System:
1) Phase A: Black.
2) Phase B: Red.
3) Neutral/Grounded: White.
d. Equipment Ground, All Systems: Green.
2.02 SINGLE CONDUCTOR BUILDING WIRE
A. Manufacturers:
1. Copper Building Wire:
a. Cerro Wire LLC: www.cerrowire.com.
b. General Cable Technologies Corporation: www.generalcable.com. c. Southwire Company: www.southwire.com.
B. Description: Single conductor insulated wire.
C. Conductor Stranding:
1. Feeders and Branch Circuits:
a. Size 10 AWG and Smaller: Solid.
b. Size 8 AWG and Larger: Stranded.
D. Insulation Voltage Rating: 600 V.
E. Insulation:
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1. Copper Building Wire: Type THHN/THWN or THHN/THWN-2, except as indicated below. a. Size 4 AWG and Larger: Type XHHW-2.
2.03 WIRING CONNECTORS
A. Description: Wiring connectors appropriate for the application, suitable for use with the conductors to be connected, and listed as complying with UL 486A-486B or UL 486C as applicable.
B. Wiring Connectors for Splices and Taps:
1. Copper Conductors Size 8 AWG and Smaller: Use twist-on insulated spring connectors.
2. Copper Conductors Size 6 AWG and Larger: Use mechanical connectors or compression connectors.
C. Wiring Connectors for Terminations:
1. Provide terminal lugs for connecting conductors to equipment furnished with terminations designed for terminal lugs.
2. Where over-sized conductors are larger than the equipment terminations can accommodate, provide connectors suitable for reducing to appropriate size, but not less than required for the rating of the overcurrent protective device.
D. Mechanical Connectors: Provide bolted type or set-screw type.
E. Compression Connectors: Provide circumferential type or hex type crimp configuration.
1. Manufacturers:
a. Burndy LLC: www.burndy.com.
b. Ilsco: www.ilsco.com.
c. Thomas & Betts Corporation: www.tnb.com.
2.04 ACCESSORIES
A. Electrical Tape:
1. Vinyl Insulating Electrical Tape: Complying with ASTM D3005 and listed as complying with UL 510; minimum thickness of 7 mil (0.18 mm); resistant to abrasion, corrosion, and sunlight; conformable for application down to 0 degrees F (-18 degrees C) and suitable for continuous temperature environment up to 221 degrees F (105 degrees C).
B. Oxide Inhibiting Compound: Listed; suitable for use with the conductors or cables to be installed.
C. Wire Pulling Lubricant:
1. Listed and labeled as complying with UL 267.
2. Suitable for use with conductors/cables and associated insulation/jackets to be installed.
3. Suitable for use at installation temperature.
D. Cable Ties: Material and tensile strength rating suitable for application.
E. Sealing Systems for Roof Penetrations: Premanufactured components and accessories as required to preserve integrity of roofing system and maintain roof warranty; suitable for cables and roofing system to be installed; designed to accommodate existing penetrations where applicable.
F. Firestop Sleeves: Listed; provide as required to preserve fire resistance rating of building elements.
PART 3 EXECUTION
3.01 INSTALLATION
A. Install products in accordance with manufacturer's instructions.
B. Perform work in accordance with NECA 1 (general workmanship).
C. Installation in Raceway:
1. Tape ends of conductors and cables to prevent infiltration of moisture and other contaminants.
2. Pull all conductors and cables together into raceway at same time. 400
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3. Do not damage conductors and cables or exceed manufacturer's recommended maximum pulling tension and sidewall pressure.
4. Use suitable wire pulling lubricant where necessary, except when lubricant is not recommended by the manufacturer.
D. Paralleled Conductors: Install conductors of the same length and terminate in the same manner.
E. Secure and support conductors and cables in accordance with NFPA 70 using suitable supports and methods approved by the authority having jurisdiction. Provide independent support from building structure. Do not provide support from raceways, piping, ductwork, or other systems.
F. Install conductors with a minimum of 12 inches (300 mm) of slack at each outlet.
G. Neatly train and bundle conductors inside boxes, wireways, panelboards and other equipment enclosures.
H. Group or otherwise identify neutral/grounded conductors with associated ungrounded conductors inside enclosures in accordance with NFPA 70.
I. Make wiring connections using specified wiring connectors.
1. Make splices and taps only in accessible boxes. Do not pull splices into raceways or make splices in conduit bodies or wiring gutters.
2. Remove appropriate amount of conductor insulation for making connections without cutting, nicking or damaging conductors.
3. Do not remove conductor strands to facilitate insertion into connector.
4. Clean contact surfaces on conductors and connectors to suitable remove corrosion, oxides, and other contaminates. Do not use wire brush on plated connector surfaces.
5. Mechanical Connectors: Secure connections according to manufacturer's recommended torque settings.
6. Compression Connectors: Secure connections using manufacturer's recommended tools and dies.
J. Insulate splices and taps that are made with uninsulated connectors using methods suitable for the application, with insulation and mechanical strength at least equivalent to unspliced conductors.
K. Insulate ends of spare conductors using vinyl insulating electrical tape.
L. Install firestopping to preserve fire resistance rating of partitions and other elements, using materials and methods specified in Section 078400.
M. Unless specifically indicated to be excluded, provide final connections to all equipment and devices, including those furnished by others, as required for a complete operating system.
3.02 FIELD QUALITY CONTROL
A. Inspect and test in accordance with NETA ATS, except Section 4.
B. Perform inspections and tests listed in NETA ATS, Section 7.3.2. The insulation resistance test is required for all conductors. The resistance test for parallel conductors listed as optional is not required.
C. Correct deficiencies and replace damaged or defective conductors and cables.
END OF SECTION 260519
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HVAC Replacement 260526 - 1 Grounding and Bonding forElectrical Systems SECTION 260526
GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS
PART 1 GENERAL
1.01 SECTION INCLUDES
A. Grounding and bonding requirements.
B. Conductors for grounding and bonding.
C. Connectors for grounding and bonding.
1.02 RELATED REQUIREMENTS
A. Section 260519 - Low-Voltage Electrical Power Conductors and Cables: Additional requirements for conductors for grounding and bonding, including conductor color coding.
B. Section 260553 - Identification for Electrical Systems: Identification products and requirements.
1.03 REFERENCE STANDARDS
A. NECA 1 - Standard for Good Workmanship in Electrical Construction 2015.
B. NFPA 70 - National Electrical Code Most Recent Edition Adopted by Authority Having Jurisdiction, Including All Applicable Amendments and Supplements.
C. UL 467 - Grounding and Bonding Equipment Current Edition, Including All Revisions.
1.04 SUBMITTALS
A. See Section 013000 - Administrative Requirements for submittals procedures.
B. Product Data: Provide manufacturer's standard catalog pages and data sheets for grounding and bonding system components.
PART 2 PRODUCTS
2.01 GROUNDING AND BONDING REQUIREMENTS
A. Do not use products for applications other than as permitted by NFPA 70 and product listing.
B. Unless specifically indicated to be excluded, provide all required components, conductors, connectors, conduit, boxes, fittings, supports, accessories, etc. as necessary for a complete grounding and bonding system.
C. Where conductor size is not indicated, size to comply with NFPA 70 but not less than applicable minimum size requirements specified.
D. Separately Derived System Grounding:
1. Separately derived systems include, but are not limited to:
a. Transformers (except autotransformers such as buck-boost transformers).
2. Provide grounding electrode conductor to connect derived system grounded conductor to nearest effectively grounded metal building frame. Unless otherwise indicated, make connection at neutral (grounded) bus in source enclosure.
3. Provide bonding jumper to connect derived system grounded conductor to nearest metal building frame and nearest metal water piping in the area served by the derived system, where not already used as a grounding electrode for the derived system. Make connection at same location as grounding electrode conductor connection.
4. Provide system bonding jumper to connect system grounded conductor to equipment ground bus. Make connection at same location as grounding electrode conductor connection. Do not make any other connections between neutral (grounded) conductors and ground on load side of separately derived system disconnect.
5. Where the source and first disconnecting means are in separate enclosures, provide supply-side bonding jumper between source and first disconnecting means.
E. Bonding and Equipment Grounding:
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1. Provide bonding for equipment grounding conductors, equipment ground busses, metallic equipment enclosures, metallic raceways and boxes, device grounding terminals, and other normally non-current-carrying conductive materials enclosing electrical conductors/equipment or likely to become energized as indicated and in accordance with NFPA 70.
2. Provide insulated equipment grounding conductor in each feeder and branch circuit raceway. Do not use raceways as sole equipment grounding conductor.
3. Where circuit conductor sizes are increased for voltage drop, increase size of equipment grounding conductor proportionally in accordance with NFPA 70.
4. Unless otherwise indicated, connect wiring device grounding terminal to branch circuit equipment grounding conductor and to outlet box with bonding jumper.
5. Terminate branch circuit equipment grounding conductors on solidly bonded equipment ground bus only. Do not terminate on neutral (grounded) or isolated/insulated ground bus.
6. Provide bonding jumper across expansion or expansion/deflection fittings provided to accommodate conduit movement.
2.02 GROUNDING AND BONDING COMPONENTS
A. General Requirements:
1. Provide products listed, classified, and labeled as suitable for the purpose intended.
2. Provide products listed and labeled as complying with UL 467 where applicable.
B. Conductors for Grounding and Bonding, in Addition to Requirements of Section 260526:
1. Use insulated copper conductors unless otherwise indicated. a. Exceptions:
1) Use bare copper conductors where installed underground in direct contact with earth.
2) Use bare copper conductors where directly encased in concrete (not in raceway).
C. Connectors for Grounding and Bonding:
1. Description: Connectors appropriate for the application and suitable for the conductors and items to be connected; listed and labeled as complying with UL 467.
2. Unless otherwise indicated, use mechanical connectors, compression connectors, or exothermic welded connections for accessible connections.
PART 3 EXECUTION
3.01 INSTALLATION
A. Install products in accordance with manufacturer's instructions.
B. Perform work in accordance with NECA 1 (general workmanship).
C. Make grounding and bonding connections using specified connectors.
1. Remove appropriate amount of conductor insulation for making connections without cutting, nicking or damaging conductors. Do not remove conductor strands to facilitate insertion into connector.
2. Remove nonconductive paint, enamel, or similar coating at threads, contact points, and contact surfaces.
3. Exothermic Welds: Make connections using molds and weld material suitable for the items to be connected in accordance with manufacturer's recommendations.
4. Mechanical Connectors: Secure connections according to manufacturer's recommended torque settings.
5. Compression Connectors: Secure connections using manufacturer's recommended tools and dies.
D. Identify grounding and bonding system components in accordance with Section 260553.
END OF SECTION 260526
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HVAC Replacement 260529 - 1 Hangers and Supports forElectrical Systems SECTION 260529
HANGERS AND SUPPORTS FOR ELECTRICAL SYSTEMS
PART 1 GENERAL
1.01 SECTION INCLUDES
A. Support and attachment requirements and components for equipment, conduit, cable, boxes, and other electrical work.
1.02 REFERENCE STANDARDS
A. ASTM A123/A123M - Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products 2017.
B. ASTM A153/A153M - Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware 2016a.
C. ASTM B633 - Standard Specification for Electrodeposited Coatings of Zinc on Iron and Steel 2019.
D. MFMA-4 - Metal Framing Standards Publication 2004.
E. NECA 1 - Standard for Good Workmanship in Electrical Construction 2015.
F. NFPA 70 - National Electrical Code Most Recent Edition Adopted by Authority Having Jurisdiction, Including All Applicable Amendments and Supplements.
PART 2 PRODUCTS
2.01 SUPPORT AND ATTACHMENT COMPONENTS
A. General Requirements:
1. Comply with the following. Where requirements differ, comply with most stringent. a. NFPA 70.
b. Requirements of authorities having jurisdiction.
2. Provide required hangers, supports, anchors, fasteners, fittings, accessories, and hardware as necessary for complete installation of electrical work.
3. Provide products listed, classified, and labeled as suitable for purpose intended, where applicable.
4. Where support and attachment component types and sizes are not indicated, select in accordance with manufacturer's application criteria as required for load to be supported with minimum safety factor of 2. Include consideration for vibration, equipment operation, and shock loads where applicable.
5. Do not use products for applications other than as permitted by NFPA 70 and product listing.
6. Steel Components: Use corrosion-resistant materials suitable for environment where installed.
a. Zinc-Plated Steel: Electroplated in accordance with ASTM B633. b. Galvanized Steel: Hot-dip galvanized after fabrication in accordance with ASTM A123/A123M or ASTM A153/A153M.
B. Conduit and Cable Supports: Straps and clamps suitable for conduit or cable to be supported.
1. Conduit Straps: One-hole or two-hole type; steel or malleable iron.
2. Conduit Clamps: Bolted type unless otherwise indicated.
C. Outlet Box Supports: Hangers and brackets suitable for boxes to be supported.
D. Metal Channel/Strut Framing Systems:
1. Description: Factory-fabricated, continuous-slot, metal channel/strut and associated fittings, accessories, and hardware required for field assembly of supports.
2. Comply with MFMA-4.
E. Hanger Rods: Threaded, zinc-plated steel unless otherwise indicated.
F. Anchors and Fasteners:
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1. Unless otherwise indicated and where not otherwise restricted, use anchor and fastener types indicated for specified applications.
PART 3 EXECUTION
3.01 INSTALLATION
A. Install products in accordance with manufacturer's instructions.
B. Install hangers and supports in accordance with NECA 1.
C. Provide independent support from building structure. Do not provide support from piping, ductwork, or other systems.
D. Unless specifically indicated or approved by Architect, do not provide support from suspended ceiling support system or ceiling grid.
E. Unless specifically indicated or approved by Architect, do not provide support from roof deck.
F. Do not penetrate or otherwise notch or cut structural members without approval of Structural Engineer.
G. Equipment Support and Attachment:
1. Use metal, fabricated supports or supports assembled from metal channel/strut to support equipment as required.
2. Use metal channel/strut secured to studs to support equipment surface mounted on hollow stud walls when wall strength is not sufficient to resist pull-out.
3. Use metal channel/strut to support surface-mounted equipment in wet or damp locations to provide space between equipment and mounting surface.
4. Securely fasten floor-mounted equipment. Do not install equipment such that it relies on its own weight for support.
H. Secure fasteners in accordance with manufacturer's recommended torque settings.
I. Remove temporary supports.
END OF SECTION 260529
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HVAC Replacement 260533.13 - 1 Conduit for Electrical Systems SECTION 260533.13
CONDUIT FOR ELECTRICAL SYSTEMS
PART 1 GENERAL
1.01 SECTION INCLUDES
A. Galvanized steel rigid metal conduit (RMC).
B. Galvanized steel intermediate metal conduit (IMC).
C. Liquidtight flexible metal conduit (LFMC).
D. Galvanized steel electrical metallic tubing (EMT).
1.02 RELATED REQUIREMENTS
A. Section 078400 - Firestopping.
B. Section 260519 - Low-Voltage Electrical Power Conductors and Cables: Cable assemblies consisting of conductors protected by integral metal armor.
C. Section 260526 - Grounding and Bonding for Electrical Systems.
D. Section 260529 - Hangers and Supports for Electrical Systems.
E. Section 260533.16 - Boxes for Electrical Systems.
1.03 REFERENCE STANDARDS
A. ANSI C80.1 - American National Standard for Electrical Rigid Steel Conduit (ERSC) 2020.
B. ANSI C80.3 - American National Standard for Electrical Metallic Tubing -- Steel (EMT-S) 2020.
C. ANSI C80.6 - American National Standard for Electrical Intermediate Metal Conduit 2018.
D. NECA 1 - Standard for Good Workmanship in Electrical Construction 2015.
E. NECA 101 - Standard for Installing Steel Conduits (Rigid, IMC, EMT) 2020.
F. NEMA FB 1 - Fittings, Cast Metal Boxes, and Conduit Bodies for Conduit, Electrical Metallic Tubing, and Cable 2014.
G. NFPA 70 - National Electrical Code Most Recent Edition Adopted by Authority Having Jurisdiction, Including All Applicable Amendments and Supplements.
H. UL 6 - Electrical Rigid Metal Conduit-Steel Current Edition, Including All Revisions.
I. UL 360 - Liquid-Tight Flexible Metal Conduit Current Edition, Including All Revisions.
J. UL 514B - Conduit, Tubing, and Cable Fittings Current Edition, Including All Revisions.
K. UL 797 - Electrical Metallic Tubing-Steel Current Edition, Including All Revisions.
L. UL 1242 - Electrical Intermediate Metal Conduit-Steel Current Edition, Including All Revisions.
1.04 ADMINISTRATIVE REQUIREMENTS
A. Coordination:
1. Coordinate minimum sizes of conduits with actual type and quantity of conductors to be installed, including adjustments for conductor sizes increased for voltage drop.
2. Coordinate arrangement of conduits with structural members, ductwork, piping, equipment, and other potential conflicts.
3. Verify exact conduit termination locations required for boxes, enclosures, and equipment.
4. Coordinate work to provide roof penetrations that preserve integrity of roofing system and do not void roof warranty.
5. Notify Architect of conflicts with or deviations from Contract Documents. Obtain direction before proceeding with work.
B. Sequencing:
1. Do not begin installation of conductors and cables until installation of conduit between termination points is complete.
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1.05 SUBMITTALS
A. See Section 013000 - Administrative Requirements for submittals procedures.
B. Product Data: Provide manufacturer's standard catalog pages and data sheets for conduits and fittings.
C. Shop Drawings:
1. Include proposed locations of roof penetrations and proposed methods for sealing.
PART 2 PRODUCTS
2.01 CONDUIT APPLICATIONS
A. Do not use conduit and associated fittings for applications other than as permitted by NFPA 70, manufacturer's instructions, and product listing.
B. Unless otherwise indicated and where not otherwise restricted, use conduit types indicated for specified applications. Where more than one listed application applies, comply with most restrictive requirements. Where conduit type for particular application is not specified, use galvanized steel rigid metal conduit.
C. Concealed Above Accessible Ceilings: Use galvanized steel rigid metal conduit (RMC), stainless steel rigid metal conduit (RMC), galvanized steel intermediate metal conduit (IMC), stainless steel intermediate metal conduit (IMC), galvanized steel electrical metallic tubing (EMT), or stainless steel electrical metallic tubing (EMT).
D. Exposed, Interior, Not Subject to Physical Damage: Use galvanized steel rigid metal conduit (RMC), stainless steel rigid metal conduit (RMC), galvanized steel intermediate metal conduit (IMC), stainless steel intermediate metal conduit (IMC), galvanized steel electrical metallic tubing (EMT), or stainless steel electrical metallic tubing (EMT).
E. Exposed, Interior, Subject to Physical Damage: Use galvanized steel rigid metal conduit (RMC), stainless steel rigid metal conduit (RMC), galvanized steel intermediate metal conduit (IMC), stainless steel intermediate metal conduit (IMC), galvanized steel electrical metallic tubing (EMT), or stainless steel electrical metallic tubing (EMT).
1. Locations subject to physical damage include, but are not limited to:
a. Where exposed below 8 feet (2.4 m), except within electrical and communication rooms or closets.
F. Exposed, Exterior, Not Subject to Severe Physical Damage: Use galvanized steel rigid metal conduit (RMC), stainless steel rigid metal conduit (RMC), galvanized steel intermediate metal conduit (IMC), stainless steel intermediate metal conduit (IMC), galvanized steel electrical metallic tubing (EMT), or stainless steel electrical metallic tubing (EMT).
G. Flexible Connections to Vibrating Equipment:
1. Damp, Wet, or Corrosive Locations: Use liquidtight flexible metal conduit (LFMC).
2. Maximum Length: 6 feet (1.8 m) unless otherwise indicated.
3. Vibrating equipment includes, but is not limited to:
a. Transformers.
b. Motors.
2.02 CONDUIT - GENERAL REQUIREMENTS
A. Comply with NFPA 70.
B. Provide conduit, fittings, supports, and accessories required for complete raceway system.
C. Provide products listed, classified, and labeled as suitable for purpose intended.
D. Where conduit size is not indicated, size to comply with NFPA 70 but not less than applicable minimum size requirements specified.
2.03 GALVANIZED STEEL RIGID METAL CONDUIT (RMC)
A. Description: NFPA 70, Type RMC galvanized steel rigid metal conduit complying with ANSI C80.1 and listed and labeled as complying with UL 6.
B. Fittings:
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1. Nonhazardous Locations: Use fittings complying with NEMA FB 1 and listed and labeled as complying with UL 514B or UL 6.
2. Material: Use steel or malleable iron.
3. Connectors and Couplings: Use threaded type fittings only. Threadless fittings, including set screw and compression/gland types, are not permitted.
2.04 GALVANIZED STEEL INTERMEDIATE METAL CONDUIT (IMC)
A. Description: NFPA 70, Type IMC galvanized steel intermediate metal conduit complying with ANSI C80.6 and listed and labeled as complying with UL 1242.
B. Fittings:
1. Nonhazardous Locations: Use fittings complying with NEMA FB 1 and listed and labeled as complying with UL 514B or UL 1242.
2. Material: Use steel or malleable iron.
3. Connectors and Couplings: Use threaded type fittings only. Threadless fittings, including set screw and compression/gland types, are not permitted.
2.05 LIQUIDTIGHT FLEXIBLE METAL CONDUIT (LFMC)
A. Description: NFPA 70, Type LFMC polyvinyl chloride (PVC) jacketed steel flexible metal conduit listed and labeled as complying with UL 360.
B. Fittings:
1. Description: Fittings complying with NEMA FB 1 and listed and labeled as complying with UL 514B.
2. Material: Use steel or malleable iron.
2.06 GALVANIZED STEEL ELECTRICAL METALLIC TUBING (EMT)
A. Description: NFPA 70, Type EMT galvanized steel electrical metallic tubing complying with ANSI C80.3 and listed and labeled as complying with UL 797.
B. Fittings:
1. Description: Fittings complying with NEMA FB 1 and listed and labeled as complying with UL 514B.
2. Material: Use steel or malleable iron.
3. Connectors and Couplings: Use compression/gland or set-screw type. a. Do not use indenter type connectors and couplings.
b. Do not use set-screw type connectors and couplings.
4. Damp or Wet Locations, Where Permitted: Use fittings listed for use in wet locations.
PART 3 EXECUTION
3.01 INSTALLATION
A. Install products in accordance with manufacturer's instructions.
B. Install conduit in accordance with NECA 1.
C. Install galvanized steel rigid metal conduit (RMC) in accordance with NECA 101.
D. Install intermediate metal conduit (IMC) in accordance with NECA 101.
E. Conduit Routing:
1. When conduit destination is indicated without specific routing, determine exact routing required.
2. Conceal conduits unless specifically indicated to be exposed.
3. Conduits in the following areas may be exposed, unless otherwise indicated:
a. Electrical rooms.
4. Unless otherwise approved, do not route exposed conduits:
a. Across top of parapet walls.
5. Arrange conduit to provide no more than equivalent of four 90-degree bends between pull points.
F. Conduit Support:
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1. Secure and support conduits in accordance with NFPA 70 using suitable supports and methods approved by authorities having jurisdiction; see Section 260529.
2. Provide independent support from building structure. Do not provide support from piping, ductwork, or other systems.
3. Use conduit clamp to support single conduit from beam clamp or threaded rod.
4. Use trapeze hangers assembled from threaded rods and metal channel/strut with accessory conduit clamps to support multiple parallel suspended conduits.
5. Use nonpenetrating rooftop supports to support conduits routed across rooftops, where approved.
G. Connections and Terminations:
1. Use approved zinc-rich paint or conduit joint compound on field-cut threads of galvanized steel conduits prior to making connections.
2. Where two threaded conduits must be joined and neither can be rotated, use three-piece couplings or split couplings. Do not use running threads.
3. Use suitable adapters where required to transition from one type of conduit to another.
4. Provide drip loops for liquidtight flexible conduit connections to prevent drainage of liquid into connectors.
5. Terminate threaded conduits in boxes and enclosures using threaded hubs or double lock nuts for dry locations and raintight hubs for wet locations.
6. Provide insulating bushings, insulated throats, or listed metal fittings with smooth, rounded edges at conduit terminations to protect conductors.
7. Secure joints and connections to provide mechanical strength and electrical continuity.
H. Penetrations:
1. Do not penetrate or otherwise notch or cut structural members, including footings and grade beams, without approval of Structural Engineer.
2. Make penetrations perpendicular to surfaces unless otherwise indicated.
3. Provide sleeves for penetrations as indicated or as required to facilitate installation. Set sleeves flush with exposed surfaces unless otherwise indicated or required.
4. Conceal bends for conduit risers emerging above ground.
5. Where conduits penetrate waterproof membrane, seal as required to maintain integrity of membrane.
6. Make penetrations for roof-mounted equipment within associated equipment openings and curbs where possible to minimize roofing system penetrations. Where penetrations are necessary, seal as indicated or as required to preserve integrity of roofing system and maintain roof warranty.
7. Install firestopping to preserve fire resistance rating of partitions and other elements; see Section 078400.
I. Conduit Movement Provisions: Where conduits are subject to movement, provide expansion and expansion/deflection fittings to prevent damage to enclosed conductors or connected equipment. This includes, but is not limited to:
1. Where conduits cross structural joints intended for expansion, contraction, or deflection.
J. Conduit Sealing:
1. Where conduits cross barriers between areas of potential substantial temperature differential, use foam conduit sealant at accessible point near penetration to prevent condensation. This includes, but is not limited to:
a. Where conduits pass from outdoors into conditioned interior spaces. b. Where conduits pass from unconditioned interior spaces into conditioned interior spaces.
K. Provide grounding and bonding; see Section 260526.
END OF SECTION 260533.13
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HVAC Replacement 260533.16 - 1 Boxes for Electrical Systems SECTION 260533.16
BOXES FOR ELECTRICAL SYSTEMS
PART 1 GENERAL
1.01 SECTION INCLUDES
A. Outlet and device boxes up to 100 cubic inches (1,650 cu cm), including those used as junction and pull boxes.
B. Cabinets and enclosures, including junction and pull boxes larger than 100 cubic inches (1,650 cu cm).
1.02 RELATED REQUIREMENTS
A. Section 260529 - Hangers and Supports for Electrical Systems.
1.03 REFERENCE STANDARDS
A. NECA 1 - Standard for Good Workmanship in Electrical Construction 2015.
B. NECA 130 - Standard for Installing and Maintaining Wiring Devices 2016.
C. NEMA 250 - Enclosures for Electrical Equipment (1000 Volts Maximum) 2020.
D. NEMA FB 1 - Fittings, Cast Metal Boxes, and Conduit Bodies for Conduit, Electrical Metallic Tubing, and Cable 2014.
E. NEMA OS 1 - Sheet-Steel Outlet Boxes, Device Boxes, Covers, and Box Supports 2013 (Reaffirmed 2020).
F. NFPA 70 - National Electrical Code Most Recent Edition Adopted by Authority Having Jurisdiction, Including All Applicable Amendments and Supplements.
G. UL 50 - Enclosures for Electrical Equipment, Non-Environmental Considerations Current Edition, Including All Revisions.
H. UL 50E - Enclosures for Electrical Equipment, Environmental Considerations Current Edition, Including All Revisions.
I. UL 508A - Industrial Control Panels Current Edition, Including All Revisions.
J. UL 514A - Metallic Outlet Boxes Current Edition, Including All Revisions.
PART 2 PRODUCTS
2.01 BOXES
A. General Requirements:
1. Do not use boxes and associated accessories for applications other than as permitted by NFPA 70 and product listing.
2. Provide all boxes, fittings, supports, and accessories required for a complete raceway system and to accommodate devices and equipment to be installed.
3. Provide products listed, classified, and labeled as suitable for the purpose intended.
4. Where box size is not indicated, size to comply with NFPA 70 but not less than applicable minimum size requirements specified.
5. Provide grounding terminals within boxes where equipment grounding conductors terminate.
B. Outlet and Device Boxes Up to 100 cubic inches (1,650 cu cm), Including Those Used as Junction and Pull Boxes:
1. Use sheet-steel boxes for dry locations unless otherwise indicated or required.
2. Use cast iron boxes or cast aluminum boxes for damp or wet locations unless otherwise indicated or required; furnish with compatible weatherproof gasketed covers.
3. Use suitable concrete type boxes where flush-mounted in concrete.
4. Use suitable masonry type boxes where flush-mounted in masonry walls.
5. Use raised covers suitable for the type of wall construction and device configuration where required.
6. Use shallow boxes where required by the type of wall construction. 410
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7. Do not use "through-wall" boxes designed for access from both sides of wall.
8. Sheet-Steel Boxes: Comply with NEMA OS 1, and list and label as complying with UL 514A.
9. Cast Metal Boxes: Comply with NEMA FB 1, and list and label as complying with UL 514A; furnish with threaded hubs.
10. Boxes for Supporting Luminaires and Ceiling Fans: Listed as suitable for the type and weight of load to be supported; furnished with fixture stud to accommodate mounting of luminaire where required.
11. Boxes for Ganged Devices: Use multigang boxes of single-piece construction. Do not use field-connected gangable boxes unless specifically indicated or permitted.
C. Cabinets and Enclosures, Including Junction and Pull Boxes Larger Than 100 cubic inches (1,650 cu cm):
1. Comply with NEMA 250, and list and label as complying with UL 50 and UL 50E, or UL 508A.
2. NEMA 250 Environment Type, Unless Otherwise Indicated:
3. Junction and Pull Boxes Larger Than 100 cubic inches (1,650 cu cm):
a. Provide screw-cover or hinged-cover enclosures unless otherwise indicated.
PART 3 EXECUTION
3.01 INSTALLATION
A. Install products in accordance with manufacturer's instructions.
B. Install boxes in accordance with NECA 1 (general workmanship) and, where applicable, NECA 130, including mounting heights specified in those standards where mounting heights are not indicated.
C. Arrange equipment to provide minimum clearances in accordance with manufacturer's instructions and NFPA 70.
D. Box Supports:
1. Secure and support boxes in accordance with NFPA 70 and Section 260529 using suitable supports and methods approved by the authority having jurisdiction.
2. Provide independent support from building structure except for cast metal boxes (other than boxes used for fixture support) supported by threaded conduit connections in accordance with NFPA 70. Do not provide support from piping, ductwork, or other systems.
E. Install boxes plumb and level.
F. Install boxes as required to preserve insulation integrity.
G. Install permanent barrier between ganged wiring devices when voltage between adjacent devices exceeds 300 V.
H. Install firestopping to preserve fire resistance rating of partitions and other elements, using materials and methods specified in Section 078400.
I. Close unused box openings.
J. Install blank wall plates on junction boxes and on outlet boxes with no devices or equipment installed or designated for future use.
K. Provide grounding and bonding in accordance with Section 260526.
END OF SECTION 260533.16
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HVAC Replacement 260553 - 1 Identification for ElectricalSystems SECTION 260553
IDENTIFICATION FOR ELECTRICAL SYSTEMS
PART 1 GENERAL
1.01 SECTION INCLUDES
A. Electrical identification requirements.
B. Identification nameplates and labels.
C. Warning signs and labels.
1.02 RELATED REQUIREMENTS
A. Section 260519 - Low-Voltage Electrical Power Conductors and Cables: Color coding for power conductors and cables 600 V and less; vinyl color coding electrical tape.
B. Section 260573 - Power System Studies: Arc flash hazard warning labels.
1.03 REFERENCE STANDARDS
A. UL 969 - Marking and Labeling Systems Current Edition, Including All Revisions.
PART 2 PRODUCTS
2.01 IDENTIFICATION REQUIREMENTS
A. Identification for Equipment:
1. Use identification nameplate to identify each piece of electrical distribution and control equipment and associated sections, compartments, and components. a. Panelboards:
1) Identify power source and circuit number. Include location when not within sight of equipment.
2) Identify main overcurrent protective device. Use identification label for panelboards with a door. For power distribution panelboards without a door, use identification nameplate.
3) Use typewritten circuit directory to identify load(s) served for panelboards with a door. Identify spares and spaces using pencil.
b. Enclosed switches, circuit breakers, and motor controllers:
1) Identify voltage and phase.
2) Identify power source and circuit number. Include location when not within sight of equipment.
3) Identify load(s) served. Include location when not within sight of equipment.
2. Arc Flash Hazard Warning Labels: Comply with Section 260573.
B. Identification for Conductors and Cables:
1. Color Coding for Power Conductors 600 V and Less: Comply with Section 260519.
2. Use identification nameplate or identification label to identify color code for ungrounded and grounded power conductors inside door or enclosure at each piece of feeder or branch-circuit distribution equipment when premises has feeders or branch circuits served by more than one nominal voltage system.
2.02 IDENTIFICATION NAMEPLATES AND LABELS
A. Identification Nameplates:
1. Materials:
2. Mounting Holes for Mechanical Fasteners: Two, centered on sides for sizes up to 1 inch (25 mm) high; Four, located at corners for larger sizes.
B. Identification Labels:
1. Materials: Use self-adhesive laminated plastic labels; UV, chemical, water, heat, and abrasion resistant.
2. Text: Use factory pre-printed or machine-printed text. Do not use handwritten text unless otherwise indicated.
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2.03 WARNING SIGNS AND LABELS
A. Comply with ANSI Z535.2 or ANSI Z535.4 as applicable.
B. Warning Signs:
1. Materials:
2. Minimum Size: 7 by 10 inches (178 by 254 mm) unless otherwise indicated.
C. Warning Labels:
1. Materials: Use factory pre-printed or machine-printed self-adhesive polyester or selfadhesive vinyl labels; UV, chemical, water, heat, and abrasion resistant; produced using materials recognized to UL 969.
2. Machine-Printed Labels: Use thermal transfer process printing machines and accessories recommended by label manufacturer.
3. Minimum Size: 2 by 4 inches (51 mm by 102 mm) unless otherwise indicated.
PART 3 EXECUTION
3.01 INSTALLATION
A. Install products in accordance with manufacturer's instructions.
B. Install identification products to be plainly visible for examination, adjustment, servicing, and maintenance. Unless otherwise indicated, locate products as follows:
1. Surface-Mounted Equipment: Enclosure front.
2. Flush-Mounted Equipment: Inside of equipment door.
3. Free-Standing Equipment: Enclosure front; also enclosure rear for equipment with rear access.
4. Elevated Equipment: Legible from the floor or working platform.
5. Interior Components: Legible from the point of access.
6. Conductors and Cables: Legible from the point of access.
C. Install identification products centered, level, and parallel with lines of item being identified.
D. Secure nameplates to exterior surfaces of enclosures using stainless steel screws and to interior surfaces using self-adhesive backing or epoxy cement.
E. Install self-adhesive labels and markers to achieve maximum adhesion, with no bubbles or wrinkles and edges properly sealed.
END OF SECTION 260553
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HVAC Replacement 260573 - 1 Power System Studies
SECTION 260573
POWER SYSTEM STUDIES
PART 1 GENERAL
1.01 SECTION INCLUDES
A. Arc flash and shock risk assessment.
1. Includes arc flash hazard warning labels.
B. Criteria for the selection and adjustment of equipment and associated protective devices not specified in this section, as determined by studies to be performed.
1.02 RELATED REQUIREMENTS
A. Section 260553 - Identification for Electrical Systems: Additional requirements for arc flash hazard warning labels.
1.03 REFERENCE STANDARDS
A. ANSI Z535.4 - American National Standard for Product Safety Signs and Labels 2011 (Reaffirmed 2017).
B. IEEE 1584 - IEEE Guide for Performing Arc-Flash Hazard Calculations 2018, with Errata (2019).
C. NETA ATS - Standard For Acceptance Testing Specifications For Electrical Power Equipment And Systems 2021.
D. NFPA 70 - National Electrical Code Most Recent Edition Adopted by Authority Having Jurisdiction, Including All Applicable Amendments and Supplements.
E. NFPA 70E - Standard for Electrical Safety in the Workplace 2021.
1.04 ADMINISTRATIVE REQUIREMENTS
A. Coordination:
1. Existing Installations: Coordinate with equipment manufacturer(s) to obtain data necessary for completion of studies.
2. Coordinate the work to provide equipment and associated protective devices complying with criteria for selection and adjustment, as determined by studies to be performed.
1.05 SUBMITTALS
A. See Section 013000 - Administrative Requirements, for submittal procedures.
B. Study reports, stamped or sealed and signed by study preparer.
C. Arc Flash Hazard Warning Label Samples: One of each type and legend specified.
D. Site-specific arc flash hazard warning labels.
1.06 POWER SYSTEM STUDIES
A. Scope of Studies:
1. Except where study descriptions below indicate exclusions, analyze system at each bus from primary protective devices of utility source down to each piece of equipment involved, including parts of system affecting calculations being performed (e.g. fault current contribution from motors).
2. Include in analysis alternate sources and operating modes (including known future configurations) to determine worst case conditions.
B. General Study Requirements:
1. Comply with NFPA 70.
2. Perform studies utilizing computer software complying with specified requirements; manual calculations are not permitted.
C. Data Collection:
1. Compile information on project-specific characteristics of actual installed equipment, protective devices, feeders, etc. as necessary to develop single-line diagram of electrical distribution system and associated input data for use in system modeling. 414
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a. Utility Source Data: Include primary voltage, maximum and minimum three-phase and line-to-ground fault currents, impedance, X/R ratio, and primary protective device information.
1) Obtain up-to-date information from Utility Company.
b. Protective Devices:
1) Circuit Breakers: Include manufacturer/model, type (e.g. thermal magnetic, electronic trip), frame size, trip rating, voltage rating, interrupting rating, available field-adjustable trip response settings, and features (e.g. zone selective interlocking).
2) Fuses: Include manufacturer/model, type/class (e.g. Class J), size/rating, and speed (e.g. time delay, fast acting).
c. Conductors: Include feeder size, material (e.g. copper, aluminum), insulation type, voltage rating, number per phase, raceway type, and actual length.
2. Existing Installations:
a. Collect data on existing electrical distribution system necessary for completion of studies, including field verification of available existing data (e.g. construction documents, previous studies). Include actual settings for field-adjustable devices.
D. Arc Flash and Shock Risk Assessment:
1. Comply with NFPA 70E.
2. Perform incident energy and arc flash boundary calculations in accordance with IEEE 1584 (as referenced in NFPA 70E Annex D), where applicable. a. Where reasonable, study preparer may assume a maximum clearing time of two seconds in accordance with IEEE 1584, provided that the conditions are such that a worker's egress from an arc flash event would not be inhibited.
3. Analyze alternate scenarios considering conditions that may result in maximum incident energy, including but not limited to:
a. Maximum and minimum utility fault currents.
b. Maximum and minimum motor contribution.
c. Known operating modes (e.g. utility as source, generator as source, utility/generator in parallel, bus tie breaker open/close positions).
E. Study Reports:
1. General Requirements:
a. Identify date of study and study preparer.
b. Identify study methodology and software product(s) used. c. Identify scope of studies, assumptions made, implications of possible alternate scenarios, and any exclusions from studies.
d. Identify base used for per unit values.
e. Include single-line diagram and associated input data used for studies; identify buses on single-line diagram as referenced in reports, and indicate bus voltage. f. Include conclusions and recommendations.
2. Arc Flash and Shock Risk Assessment:
a. For the worst case for each scenario, identify at each bus location:
1) Calculated incident energy and associated working distance. 2) Calculated arc flash boundary.
3) Bolted fault current.
4) Arcing fault current.
5) Clearing time.
6) Arc gap distance.
b. For purposes of producing arc flash hazard warning labels, summarize the maximum incident energy and associated data reflecting the worst case condition of all scenarios at each bus location.
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1.07 QUALITY ASSURANCE
A. Study Preparer Qualifications: Professional electrical engineer licensed in the State in which the Project is located and with minimum five years experience in preparation of studies of similar type and complexity using specified computer software.
B. Computer Software for Study Preparation: Use the latest edition of commercially available software utilizing specified methodologies.
PART 2 PRODUCTS
2.01 ARC FLASH HAZARD WARNING LABELS
A. Provide warning labels complying with ANSI Z535.4 to identify arc flash hazards for each work location analyzed by the arc flash and shock risk assessment.
1. Materials: Comply with Section 260553.
2. Legend: Provide custom legend in accordance with NFPA 70E based on equipmentspecific data as determined by arc flash and shock risk assessment. a. Include the following information:
1) Arc flash boundary.
2) Available incident energy and corresponding working distance. 3) Nominal system voltage.
4) Limited approach boundary.
5) Restricted approach boundary.
6) Study preparer, report reference, and date calculations were performed.
PART 3 EXECUTION
3.01 FIELD QUALITY CONTROL
A. Inspect and test in accordance with NETA ATS, except Section 4.
B. Adjust equipment and protective devices for compliance with studies and recommended settings.
C. Notify Architect of any conflicts with or deviations from studies. Obtain direction before proceeding.
END OF SECTION 260573
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HVAC Replacement 260583 - 1 Wiring Connections
SECTION 260583
WIRING CONNECTIONS
PART 1 GENERAL
1.01 SECTION INCLUDES
A. Electrical connections to equipment.
1.02 RELATED REQUIREMENTS
A. Section 260519 - Low-Voltage Electrical Power Conductors and Cables.
B. Section 260533.13 - Conduit for Electrical Systems.
C. Section 262816.16 - Enclosed Switches.
PART 2 PRODUCTS
2.01 MATERIALS
A. Disconnect Switches: As specified in Section 262816.16 and in individual equipment sections.
B. Flexible Conduit: As specified in Section 260533.13.
C. Wire and Cable: As specified in Section 260519.
PART 3 EXECUTION
3.01 ELECTRICAL CONNECTIONS
A. Make electrical connections in accordance with equipment manufacturer's instructions.
B. Make conduit connections to equipment using flexible conduit. Use liquidtight flexible conduit with watertight connectors in damp or wet locations.
C. Connect heat producing equipment using wire and cable with insulation suitable for temperatures encountered.
D. Install disconnect switches, controllers, control stations, and control devices to complete equipment wiring requirements.
E. Install interconnecting conduit and wiring between devices and equipment to complete equipment wiring requirements.
END OF SECTION 260583
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HVAC Replacement 262416 - 1 Panelboards
SECTION 262416
PANELBOARDS
PART 1 GENERAL
1.01 RELATED REQUIREMENTS
A. Section 260526 - Grounding and Bonding for Electrical Systems.
B. Section 260529 - Hangers and Supports for Electrical Systems.
1.02 REFERENCE STANDARDS
A. FS W-C-375 - Circuit Breakers, Molded Case; Branch Circuit and Service 2013e, with Amendment (2017).
B. NECA 1 - Standard for Good Workmanship in Electrical Construction 2015.
C. NECA 407 - Standard for Installing and Maintaining Panelboards 2015.
D. NEMA 250 - Enclosures for Electrical Equipment (1000 Volts Maximum) 2020.
E. NEMA PB 1 - Panelboards 2011.
F. NEMA PB 1.1 - General Instructions for Proper Installation, Operation and Maintenance of Panelboards Rated 600 Volts or Less 2013.
G. NETA ATS - Standard For Acceptance Testing Specifications For Electrical Power Equipment And Systems 2021.
H. NFPA 70 - National Electrical Code Most Recent Edition Adopted by Authority Having Jurisdiction, Including All Applicable Amendments and Supplements.
I. UL 50 - Enclosures for Electrical Equipment, Non-Environmental Considerations Current Edition, Including All Revisions.
J. UL 50E - Enclosures for Electrical Equipment, Environmental Considerations Current Edition, Including All Revisions.
K. UL 67 - Panelboards Current Edition, Including All Revisions.
L. UL 489 - Molded-Case Circuit Breakers, Molded-Case Switches and Circuit Breaker Enclosures Current Edition, Including All Revisions.
1.03 ADMINISTRATIVE REQUIREMENTS
A. Coordination:
1. Coordinate the work with other trades to avoid placement of ductwork, piping, equipment, or other potential obstructions within the dedicated equipment spaces and working clearances for electrical equipment required by NFPA 70.
2. Coordinate arrangement of electrical equipment with the dimensions and clearance requirements of the actual equipment to be installed.
3. Verify with manufacturer that conductor terminations are suitable for use with the conductors to be installed.
4. Notify Architect of any conflicts with or deviations from Contract Documents. Obtain direction before proceeding with work.
1.04 SUBMITTALS
A. See Section 013000 - Administrative Requirements, for submittal procedures.
B. Product Data: Provide manufacturer's standard catalog pages and data sheets for panelboards, enclosures, overcurrent protective devices, and other installed components and accessories.
C. Shop Drawings: Indicate outline and support point dimensions, voltage, main bus ampacity, overcurrent protective device arrangement and sizes, short circuit current ratings, conduit entry locations, conductor terminal information, and installed features and accessories. 420
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PART 2 PRODUCTS
2.01 PANELBOARDS - GENERAL REQUIREMENTS
A. Provide products listed, classified, and labeled as suitable for the purpose intended.
B. Unless otherwise indicated, provide products suitable for continuous operation under the following service conditions:
1. Altitude: Less than 6,600 feet (2,000 m).
C. Short Circuit Current Rating:
1. Provide panelboards with listed short circuit current rating not less than the available fault current at the installed location as indicated on the drawings.
D. Mains: Configure for top or bottom incoming feed as indicated or as required for the installation.
E. Branch Overcurrent Protective Devices: Replaceable without disturbing adjacent devices.
F. Bussing: Sized in accordance with UL 67 temperature rise requirements.
1. Provide solidly bonded equipment ground bus in each panelboard, with a suitable lug for each feeder and branch circuit equipment grounding conductor.
G. Conductor Terminations: Suitable for use with the conductors to be installed.
H. Enclosures: Comply with NEMA 250, and list and label as complying with UL 50 and UL 50E.
1. Environment Type per NEMA 250: Unless otherwise indicated, as specified for the following installation locations:
a. Outdoor Locations: Type 3R.
2. Boxes: Galvanized steel unless otherwise indicated.
a. Provide wiring gutters sized to accommodate the conductors to be installed.
3. Fronts:
a. Fronts for Surface-Mounted Enclosures: Same dimensions as boxes.
4. Lockable Doors: All locks keyed alike unless otherwise indicated.
I. Future Provisions: Prepare all unused spaces for future installation of devices including bussing, connectors, mounting hardware and all other required provisions.
2.02 POWER DISTRIBUTION PANELBOARDS
A. Description: Panelboards complying with NEMA PB 1, power and feeder distribution type, circuit breaker type, and listed and labeled as complying with UL 67; ratings, configurations and features as indicated on the drawings.
B. Conductor Terminations:
1. Main and Neutral Lug Material: Aluminum, suitable for terminating aluminum or copper conductors.
2. Main and Neutral Lug Type: Mechanical.
C. Bussing:
1. Phase and Neutral Bus Material: Copper.
2. Ground Bus Material: Copper.
D. Circuit Breakers:
1. Provide bolt-on type.
2. Provide thermal magnetic circuit breakers unless otherwise indicated.
E. Enclosures:
1. Provide surface-mounted enclosures unless otherwise indicated.
2.03 OVERCURRENT PROTECTIVE DEVICES
A. Molded Case Circuit Breakers:
1. Description: Quick-make, quick-break, over center toggle, trip-free, trip-indicating circuit breakers listed and labeled as complying with UL 489, and complying with FS W-C-375 where applicable; ratings, configurations, and features as indicated on the drawings.
2. Interrupting Capacity:
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a. Provide circuit breakers with interrupting capacity as required to provide the short circuit current rating indicated.
b. Series Rated Systems: Provide circuit breakers listed in combination with upstream devices to provide interrupting rating not less than the short circuit current rating indicated.
3. Conductor Terminations:
a. Provide mechanical lugs unless otherwise indicated.
b. Lug Material: Aluminum, suitable for terminating aluminum or copper conductors.
4. Thermal Magnetic Circuit Breakers: For each pole, furnish thermal inverse time tripping element for overload protection and magnetic instantaneous tripping element for short circuit protection.
5. Multi-Pole Circuit Breakers: Furnish with common trip for all poles.
PART 3 EXECUTION
3.01 INSTALLATION
A. Perform work in accordance with NECA 1 (general workmanship).
B. Install products in accordance with manufacturer's instructions.
C. Install panelboards in accordance with NECA 407 and NEMA PB 1.1.
D. Arrange equipment to provide minimum clearances in accordance with manufacturer's instructions and NFPA 70.
E. Provide required support and attachment in accordance with Section 260529.
F. Install panelboards plumb.
G. Mount panelboards such that the highest position of any operating handle for circuit breakers or switches does not exceed 79 inches (2000 mm) above the floor or working platform.
H. Provide grounding and bonding in accordance with Section 260526.
I. Install all field-installed branch devices, components, and accessories.
J. Provide filler plates to cover unused spaces in panelboards.
3.02 FIELD QUALITY CONTROL
A. Inspect and test in accordance with NETA ATS, except Section 4.
B. Molded Case Circuit Breakers: Perform inspections and tests listed in NETA ATS, Section
7.6.1.1 for all main circuit breakers. Tests listed as optional are not required.
C. Correct deficiencies and replace damaged or defective panelboards or associated components.
3.03 CLEANING
A. Clean dirt and debris from panelboard enclosures and components according to manufacturer's instructions.
B. Repair scratched or marred exterior surfaces to match original factory finish.
END OF SECTION 262416
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HVAC Replacement 262816.16 - 1 Enclosed Switches
SECTION 262816.16
ENCLOSED SWITCHES
PART 1 GENERAL
1.01 SECTION INCLUDES
A. Enclosed safety switches.
1.02 RELATED REQUIREMENTS
A. Section 260526 - Grounding and Bonding for Electrical Systems.
B. Section 260529 - Hangers and Supports for Electrical Systems.
1.03 REFERENCE STANDARDS
A. NECA 1 - Standard for Good Workmanship in Electrical Construction 2015.
B. NEMA 250 - Enclosures for Electrical Equipment (1000 Volts Maximum) 2020.
C. NEMA KS 1 - Heavy Duty Enclosed and Dead-Front Switches (600 Volts Maximum) 2013.
D. NFPA 70 - National Electrical Code Most Recent Edition Adopted by Authority Having Jurisdiction, Including All Applicable Amendments and Supplements.
E. UL 50 - Enclosures for Electrical Equipment, Non-Environmental Considerations Current Edition, Including All Revisions.
F. UL 50E - Enclosures for Electrical Equipment, Environmental Considerations Current Edition, Including All Revisions.
G. UL 98 - Enclosed and Dead-Front Switches Current Edition, Including All Revisions.
1.04 ADMINISTRATIVE REQUIREMENTS
A. Coordination:
1. Coordinate the work with other trades. Avoid placement of ductwork, piping, equipment, or other potential obstructions within the dedicated equipment spaces and within working clearances for electrical equipment required by NFPA 70.
2. Coordinate arrangement of electrical equipment with the dimensions and clearance requirements of the actual equipment to be installed.
3. Verify with manufacturer that conductor terminations are suitable for use with the conductors to be installed.
4. Notify Architect of any conflicts with or deviations from Contract Documents. Obtain direction before proceeding with work.
1.05 SUBMITTALS
A. See Section 013000 - Administrative Requirements, for submittal procedures.
B. Product Data: Provide manufacturer's standard catalog pages and data sheets for enclosed switches and other installed components and accessories.
PART 2 PRODUCTS
2.01 ENCLOSED SAFETY SWITCHES
A. Description: Quick-make, quick-break enclosed safety switches listed and labeled as complying with UL 98; heavy duty; ratings, configurations, and features as indicated on the drawings.
B. Provide products listed, classified, and labeled as suitable for the purpose intended.
C. Horsepower Rating: Suitable for connected load.
D. Voltage Rating: Suitable for circuit voltage.
E. Provide with switch blade contact position that is visible when the cover is open.
F. Conductor Terminations: Suitable for use with the conductors to be installed.
G. Provide solidly bonded equipment ground bus in each enclosed safety switch, with a suitable lug for terminating each equipment grounding conductor. 424
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H. Enclosures: Comply with NEMA 250, and list and label as complying with UL 50 and UL 50E.
1. Environment Type per NEMA 250: Unless otherwise indicated, as specified for the following installation locations:
I. Provide safety interlock to prevent opening the cover with the switch in the ON position with capability of overriding interlock for testing purposes.
J. Heavy Duty Switches:
1. Comply with NEMA KS 1.
2. Conductor Terminations:
a. Lug Material: Aluminum, suitable for terminating aluminum or copper conductors.
3. Provide externally operable handle with means for locking in the OFF position, capable of accepting three padlocks.
PART 3 EXECUTION
3.01 INSTALLATION
A. Install products in accordance with manufacturer's instructions.
B. Perform work in accordance with NECA 1 (general workmanship).
C. Arrange equipment to provide minimum clearances in accordance with manufacturer's instructions and NFPA 70.
D. Provide required support and attachment in accordance with Section 260529.
E. Install enclosed switches plumb.
F. Except where indicated to be mounted adjacent to the equipment they supply, mount enclosed switches such that the highest position of the operating handle does not exceed 79 inches (2000 mm) above the floor or working platform.
G. Provide grounding and bonding in accordance with Section 260526.
END OF SECTION 262816.16
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HVAC Replacement 284600 - 1 Fire Detection and Alarm
SECTION 284600
FIRE DETECTION AND ALARM
PART 1 GENERAL
1.01 SECTION INCLUDES
A. Fire alarm system design and installation, including all components, wiring, and conduit.
B. Replacement and removal of existing fire alarm system components, wiring, and conduit indicated.
1.02 RELATED REQUIREMENTS
A. Section 078400 - Firestopping: Materials and methods for work to be performed by this installer.
1.03 REFERENCE STANDARDS
A. NFPA 70 - National Electrical Code Most Recent Edition Adopted by Authority Having Jurisdiction, Including All Applicable Amendments and Supplements.
B. NFPA 72 - National Fire Alarm and Signaling Code Most Recent Edition Cited by Referring Code or Reference Standard.
1.04 SUBMITTALS
A. See Section 013000 - Administrative Requirements, for submittal procedures.
B. Evidence of designer qualifications.
C. Design Documents: Submit all information required for plan review and permitting by authorities having jurisdiction, including but not limited to floor plans, riser diagrams, and description of operation:
1. Copy (if any) of list of data required by authority having jurisdiction.
2. NFPA 72 "Record of Completion", filled out to the extent known at the time.
3. Clear and concise description of operation, with input/output matrix similar to that shown in NFPA 72 Appendix A-7-5-2.2(9), and complete listing of software required.
4. Location of all components, circuits, and raceways; mark components with identifiers used in control unit programming.
5. Circuit layouts; number, size, and type of raceways and conductors; conduit fill calculations; spare capacity calculations; notification appliance circuit voltage drop calculations.
6. Manufacturer's detailed data sheet for each component, including wiring diagrams, installation instructions, and circuit length limitations.
7. Certification by Contractor that the system design complies with Contract Documents.
8. Do not show existing components to be removed.
D. Evidence of installer qualifications.
E. Inspection and Test Reports:
1. Submit inspection and test plan prior to closeout demonstration.
2. Submit documentation of satisfactory inspections and tests.
3. Submit NFPA 72 "Inspection and Test Form," filled out.
F. Project Record Documents: See Section 017800 for additional requirements; have one set available during closeout demonstration:
1. Complete set of floor plans showing actual installed locations of components, conduit, and zones.
2. "As installed" wiring and schematic diagrams, with final terminal identifications.
3. "As programmed" operating sequences, including control events by device, updated input/output chart, and voice messages by event.
G. Closeout Documents:
1. Certification by manufacturer that the system has been installed in compliance with manufacturer's installation requirements, is complete, and is in satisfactory operating condition.
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2. NFPA 72 "Record of Completion", filled out completely and signed by installer and authorized representative of authority having jurisdiction.
1.05 QUALITY ASSURANCE
A. Designer Qualifications: NICET Level III or IV (3 or 4) certified fire alarm technician or registered fire protection engineer, employed by fire alarm control panel manufacturer, Contractor, or installer , with experience designing fire alarm systems in the jurisdictional area of the authorities having jurisdiction.
B. Installer Qualifications: Firm with minimum 3 years documented experience installing fire alarm systems of the specified type and providing contract maintenance service as a regular part of their business.
1. Authorized representative of control unit manufacturer; submit manufacturer's certification that installer is authorized; include name and title of manufacturer's representative making certification.
2. Installer Personnel: At least 2 years of experience installing fire alarm systems.
3. Supervisor: NICET level III or IV (3 or 4) certified fire alarm technician; furnish name and address.
1.06 WARRANTY
A. Provide control panel manufacturer's warranty that system components other than wire and conduit are free from defects and will remain so for 1 year after date of Substantial Completion.
B. Provide installer's warranty that the installation is free from defects and will remain so for 1 year after date of Substantial Completion.
PART 2 PRODUCTS
2.01 EXISTING COMPONENTS
A. Remove unused existing components and materials from site and dispose of properly.
2.02 FIRE SAFETY SYSTEMS INTERFACES
A. Alarm: Provide alarm initiation in accordance with NFPA 72 for the following:
1. Duct smoke detectors.
B. HVAC:
1. Duct Smoke Detectors: Close dampers indicated; shut down air handlers indicated.
2.03 COMPONENTS
A. General:
1. Provide legible, permanent labels for each control device, using identification used in operation and maintenance data.
B. Initiating Devices:
1. Addressable Systems:
a. Addressable Devices: Individually identifiable by addressable fire alarm control unit. b. Provide suitable addressable interface modules as indicated or as required for connection to conventional (non-addressable) devices and other components that provide a dry closure output.
2. Duct Smoke Detectors: To match existing system.
a. Provide 1 extra.
C. Circuit Conductors: Copper or optical fiber; provide 200 feet (60 m) extra; color code and label.
PART 3 EXECUTION
3.01 INSTALLATION
A. Install in accordance with applicable codes, NFPA 72, NFPA 70, and Contract Documents.
3.02 INSPECTION AND TESTING FOR COMPLETION
A. Notify Owner 7 days prior to beginning completion inspections and tests. 427
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B. Notify authorities having jurisdiction and comply with their requirements for scheduling inspections and tests and for observation by their personnel.
C. Provide the services of the installer's supervisor or person with equivalent qualifications to supervise inspection and testing, correction, and adjustments.
D. Prepare for testing by ensuring that all work is complete and correct; perform preliminary tests as required.
E. Provide all tools, software, and supplies required to accomplish inspection and testing.
F. Perform inspection and testing in accordance with NFPA 72 and requirements of local authorities; document each inspection and test.
G. Correct defective work, adjust for proper operation, and retest until entire system complies with Contract Documents.
3.03 CLOSEOUT
A. Closeout Demonstration: Demonstrate proper operation of all functions to Owner.
1. Be prepared to conduct any of the required tests.
2. Have at least one copy of operation and maintenance data, preliminary copy of project record drawings, input/output matrix, and operator instruction chart(s) available during demonstration.
3. Have authorized technical representative of control unit manufacturer present during demonstration.
4. Demonstration may be combined with inspection and testing required by authority having jurisdiction; notify authority having jurisdiction in time to schedule demonstration.
5. Repeat demonstration until successful.
END OF SECTION 284600
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PART 8 APPENDIX (BOUND
SEPARATELY)
ACCO Engineered Systems
CPC24-051 City Hall HVAC Replacement
Expires: 300 Working Days
429
PART 9 CONTRACT DRAWINGS
(BOUND SEPARATELY)
ACCO Engineered Systems
CPC24-051 City Hall HVAC Replacement
Expires: 300 Working Days
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CITY COUNCIL AGENDA REPORT
MEETING DATE: March 20, 2024 ITEM #6
SUBJECT:
CONSIDERATION OF SECOND READING AND ADOPTION OF ORDINANCE 24-5 AMENDING TITLE 10 (VEHICLES AND TRAFFIC) OF THE MUNICIPAL CODE RELATING
TO THE RE-ESTABLISHMENT OF SPEED LIMITS ON CERTAIN STREETS WITHIN THE CITY OF WEST SACRAMENTO (CIP 12019)
INITIATED OR REQUESTED BY: REPORT PREPARED BY:
Joanna Ortiz, Assistant Engineer
Christian Asuncion, Associate Civil Engineer
Capital Projects Department
[ ] Council [X] Staff
[ ] Other
ATTACHMENT [X] Yes [ ] No [ ] Information [ ] Direction [X] Action
OBJECTIVE
The objective of this report is to provide the City Council with sufficient information to consider the adoption of Ordinance 24-5 amending Title 10 of the Municipal Code relating to the reestablishment of speed limits on certain streets within the City of West Sacramento.
RECOMMENDED ACTION
Staff respectfully recommends that the City Council waive the second reading and read by title and number only, and adopt Ordinance 24-5, amending Title 10 (Vehicles and Traffic) of the Municipal Code relating to the reestablishment of speed limits on certain streets within the City of West Sacramento.
BACKGROUND
The City of West Sacramento is dedicated to providing a safe environment for motorists, bicyclists, and pedestrians. Setting speed limits requires a rational procedure to maintain the confidence of the public and legal systems. Determining speed limits relies on the premise that a reasonable speed limit is one that conforms to the actual behavior of the majority of drivers. According to the California Vehicle Code (CVC) Section 22358, posted speed limits along collector and arterial roadways must be established and justified by an Engineering and Traffic Survey. These posted speed limits must also be updated every seven (7) years and can be extended to ten (10) years when a registered Civil or Traffic Engineer determines that no significant changes in roadway or traffic conditions have occurred.
The last update to the Citywide speed limit surveys was conducted in 2013. On August 3, 2020, City staff solicited proposals for professional services with a Request for Proposal (RFP) posted to the City website. The City received proposals from the following three firms, listed in alphabetical order:
Kimley Horn
Mott MacDonald
TJKM
A three (3) person panel ranked and evaluated the proposals. The panel concluded that Mott MacDonald was the most qualified consultant to complete this assignment and to do so in a timely manner. The City Council approved the contract with Mott MacDonald on November 18, 2020.
Upon approval of the Mott MacDonald contract, City staff, in coordination with the Police Department, prioritized segments throughout the City to update. The radar speed surveys for these segments were conducted by National Data & Surveying (NDS).
Since speed limits are codified in the City Municipal Code, ordinances were required to reestablish the speed limits with the correct date of the reestablishment in code.
The following ordinances have been approved by City Council:
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March 20, 2024