Amendment 0006 - Attachment 01 - 23 64 00 - Packaged Water Chillers.pdf

Pensacola JACC

Addition & Renovation

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SECTION 23 64 00

PACKAGED WATER CHILLERS

PART 1 - GENERAL

1.1 DESCRIPTION

A. A complete listing of common acronyms and abbreviations are included in

Section 23 05 11, COMMON WORK RESULTS FOR HVAC.

B. This section covers Centrifugal Water-cooled Chillers, complete with accessories.

1.2 DEFINITIONS

A. Engineering Control Center (ECC): The centralized control point for the intelligent control network. The ECC comprises of personal computer and connected devices to form a single workstation.

B. BACNET: Building Automation Control Network Protocol, ASHRAE 135.

C. Ethernet: A trademark for a system for exchanging messages between computers on a local area network using coaxial, fiber optic, or twisted-pair cables.

D. FTT-10: Echelon Transmitter-Free Topology Transceiver.

1.3 RELATED WORK

A. Section 01 00 00, GENERAL REQUIREMENTS.

B. Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, and SAMPLES.

C. Section 01 81 13, SUSTAINABLE CONSTRUCTION REQUIREMENTS.

D. Section 01 91 00, GENERAL COMMISSIONING REQUIREMENTS.

E. Section 03 30 00, CAST-IN-PLACE CONCRETE.

F. Section 11 41 21, WALK-IN COOLERS and FREEZERS.

G. Section 23 05 11, COMMON WORK RESULTS FOR HVAC.

H. Section 23 05 12, GENERAL MOTOR REQUIREMENTS FOR HVAC and STEAM

GENERATION EQUIPMENT.

I. Section 23 05 41, NOISE and VIBRATION CONTROL FOR HVAC PIPING and

EQUIPMENT.

J. Section 23 08 00, COMMISSIONING OF HVAC SYSTEMS.

K. Section 23 21 13, HYDRONIC PIPING.

L. Section 23 21 23, HYDRONIC PUMPS.

M. Section 23 23 00, REFRIGERANT PIPING.

N. Section 23 31 00, HVAC DUCTS and CASINGS

O. Section 23 81 00, DECENTRALIZED UNITARY HVAC EQUIPMENT.

P. Section 26 29 11, MOTOR CONTROLLERS.

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1.4 APPLICABLE PUBLICATIONS

A. The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by the basic designation only. Where conflicts occur these specifications and the VHA standards will govern.

B. Air Conditioning, Heating, and Refrigeration Institute (AHRI):

550/590-2020............Performance Rating of Water-Chilling and Heat

Pump Water-Heating Packages Using the Vapor

Compression Cycle

575-2017................Method of Measuring Machinery Sound within an

Equipment Space

C. American Society of Heating, Refrigerating, and Air-Conditioning

Engineers (ASHRAE):

15-2019.................Safety Standard for Refrigeration Systems

34-2022.................Designation and Classification of Refrigerants

(ANSI)

135-2020................BACnet - A Data Communication Protocol for

Building Automation and Control Networks

D. American Society of Mechanical Engineers (ASME):

ASME Boiler and Pressure Vessel Code -

BPVC Section VIII-2021 .Rules for Construction of Pressure Vessels, Division 1

E. American Society of Testing Materials (ASTM):

C534/C534M-2020a........Standard Specification for Preformed Flexible

Elastomeric Cellular Thermal Insulation in

Sheet and Tubular Form

C612-2014(R2019)........Standard Specification for Mineral Fiber Block and Board Thermal Insulation

F. Occupational Safety and Health Administration (OSHA):

29 CFR 1910.95..........Occupational Noise Exposure

G. Department of Veterans Affairs (VA):

PG-18-10-2017(R2023)....HVAC Design Manual

1.5 SUBMITTALS

A. Submittals, including number of required copies, shall be submitted in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND

SAMPLES.

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B. Information and material submitted under this section shall be marked

“SUBMITTED UNDER SECTION 23 64 00, PACKAGED WATER CHILLERS”, with applicable paragraph identification.

C. Manufacturer's Literature and Data Including: Full item description and optional features and accessories. Include dimensions, weights, materials, applications, standard compliance, model numbers, size, and capacity.

1. Centrifugal water chillers, including motor starters, control panels, and vibration isolators, and remote condenser data shall include the following:

a. Rated capacity.

b. Pressure drop.

c. Efficiency at full load and part load WITHOUT applying any tolerance indicated in the AHRI 550/590.

d. Refrigerant

f. Accessories.

g. Installation instructions.

h. Startup procedures.

i. Wiring diagrams, including factory-installed and field-installed wiring.

j. Sound/Noise data report. Manufacturer shall provide sound ratings. Noise warning labels shall be posted on equipment.

k. Refrigerant vapor detectors and monitors.

D. Run test report for all chillers.

E. Product Certificate: Signed by chiller manufacturer certifying that chillers furnished comply with AHRI requirements. The test report shall include calibrated curves, calibration records, and data sheets for the instrumentation used in factory tests.

F. Complete operating and maintenance manuals including wiring diagrams, technical data sheets, information for ordering replaceable parts, and troubleshooting guide:

1. Include complete list indicating all components of the systems.

2. Include complete diagrams of the internal wiring for each item of equipment.

3. Diagrams shall have their terminals identified to facilitate installation, operation, and maintenance.

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G. Completed System Readiness Checklist provided by the CxA and completed by the contractor, signed by a qualified technician, and dated on the date of completion, in accordance with the requirements of Section 23

08 00, COMMISSIONING OF HVAC SYSTEMS.

H. Submit training plans and instructor qualifications in accordance with the requirements of Section 23 08 00, COMMISSIONING OF HVAC SYSTEMS.

1.6 QUALITY ASSURANCE

A. Comply with AHRI requirements for testing and certification of the chillers.

B. Refer to paragraph, WARRANTY, Section 01 00 00, GENERAL REQUIREMENTS.

C. Refer to OSHA 29 CFR 1910.95(a) and (b) for Occupational Noise Exposure

Standard.

D. Refer to ASHRAE 15 for refrigerant vapor detectors and monitor.

1.7 AS-BUILT DOCUMENTATION

A. Comply with requirements in paragraph AS-BUILT DOCUMENTATION of Section

23 05 11, COMMON WORK RESULTS FOR HVAC.

PART 2 - PRODUCTS

2.1 CENTRIFUGAL WATER-COOLED WATER CHILLERS

A. General: Chiller shall be factory assembled and factory tested, complete with evaporator, condenser, marine water boxes for condenser and evaporator, compressor, motor, starter, oil heater and cooler, economizer or intercooler, purge system (if required), refrigerant piping, instrumentation and control piping, operating and safety controls mounted on the chiller, and other auxiliaries necessary for safe and proper operation of the unit. Chiller operation shall be fully automatic. Make provision for space and design piping layout to suit the marine water boxes.

B. Performance: Provide the capacity as shown on the contract drawings.

Part load and full load efficiency ratings of the chiller shall not exceed those shown on the contract drawings.

C. Capacity of a single water-cooled chiller shall not exceed 1,250 Tons

(standard AHRI conditions).

D. Applicable Standard: Chillers shall be rated and certified in accordance with AHRI 550/590. Chillers shall be AHRI stamped. Chiller efficiency shall comply with FEMP (Federal Energy Management Progress) requirements.

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E. Acoustics: Sound pressure levels shall not exceed the following specified levels. The manufacturer shall provide sound treatment if required to comply with the specified maximum levels. Testing shall be in accordance with AHRI 575.

OCTAVE BAND Overall

63 125 250 500 1000 2000 4000 8000 dB(A)

F. Hermetic or Open: Chillers shall be open or hermetically sealed, using refrigerant type R-134a. EPA approved refrigerants are listed at https://www.epa.gov/snap/. Submit proposed refrigerant for government approval.

G. Compressor (Centrifugal Type): Single or multistage, having statically and dynamically balanced impeller, either direct or gear driven.

Impeller shaft shall be heat-treated carbon steel of sufficient rigidity to prevent whip or vibration at operating speed. Shaft main bearings shall be of journal type with bronze or babbitt line steel cartridge, aluminum alloy one-piece insert type, or rolling element type. Casing shall be cast-iron or steel plate with split sections gasketed and bolted together. Lubrication System shall be forced-feed type and shall provide oil at proper temperature to all parts requiring lubrication. Make provisions to ensure lubrication of bearings prior to starting and of shaft seal both on stopping and starting, or bearings and shaft seal shall be submerged in oil. On units providing for forced-feed lubrication prior to starting, a differential oil pressure cutout interlocked with compressor starting equipment shall allow compressor to operate only when required oil pressure is provided to bearings. Capacity control shall be by means of variable inlet guide vanes in the compressor suction to modulate the chiller capacity from

100 to 10 percent of full unit rated capacity without unstable compressor operation. The inlet guide vanes shall be electrically operated upon the actuation of temperature or pressure sensor.

H. Evaporator: Shell-and-tube type, constructed and tested and stamped in accordance with ASME BPVC Section VIII where applicable for working pressure produced by refrigerant used and water system installed, but not less than 1034 kPa (150 psig) waterside working pressure. Shell shall be fabricated of carbon steel and shall have carbon steel tube sheets; drilled and reamed to accommodate the tubes. Tubes shall be externally and internally enhanced individually replaceable and shall

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23 64 00 - 6 be expanded full diameter into tube sheets, providing a leak proof seal. Intermediate tube supports sheets shall be provided as recommended by the manufacturer to minimize tube vibration, stress, and wear. Performance shall be based on a water velocity not less than 1 m/s (3 fps) nor greater than 4 m/s (12 fps), and fouling factor of

0.0000176 m2 degrees C (0.0001 hr. sq. ft. degrees F/Btu). Removable marine water box shall be constructed of steel. Design working pressure shall be 1034 kPa (150 psig); pressure tested at 130 percent of working pressure. Water nozzle connections shall be flanged.

I. Condenser: Shell-and-tube type, constructed, tested, and stamped in accordance with applicable portions of ASME BPVC Section VIII, where applicable for working pressure produced by the refrigerant used and water system installed, but not less than 1034 kPa (150 psig). Shell shall be fabricated of carbon steel and shall have carbon steel tube sheets; drilled and reamed to accommodate the tubes. Tubes shall be nonferrous metal, externally enhanced, and internally enhanced, individually replaceable, and shall be expanded full diameter into tube sheets, providing a leak proof seal. Intermediate tube support sheets shall be provided as recommended by the manufacturer to minimize tube vibration, stress and wear. Tubes shall fit tightly in the supports to prevent chafing due to vibration or pulsation. Performance of condenser shall be based on a water velocity not less than 1 m/s (3 fps) nor greater than 4 m/s (12 fps), and a fouling factor of 0.000044 m2 degrees C (0.00025 hr. sq. ft.) degrees F/Btu. Removable marine water box shall be constructed of steel. Design working pressure shall be

1034 kPa (150 psig); pressure tested at 130 percent of working pressure. Water nozzle connections shall be flanged.

J. Insulation: Evaporator, suction piping, compressor, and all other parts subject to condensation shall be insulated with 38 mm (1.5 inch) minimum thickness of flexible-elastomeric thermal insulation, complying with ASTM C534/C534M.

K. Economizer: Provide if required by manufacturer. Flash gas shall be piped from economizer to inlet of intermediate stage impeller wheel. In case of rotary compressor flash gas shall be piped from economizer to the intermediate compressor point. Provide a refrigerant flow control system (float valve or variable/multiple orifice system) to automatically regulate flow of liquid refrigerant through economizer.

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If external-type economizer is used, such economizer shall be constructed and tested in accordance with ASME BPVC Section VIII for working pressures produced by refrigerant used.

L. Motor Load Limiter: Provide a sensing and control system, which will limit maximum load current of compressor motor to a manually selectable percentage of 40 percent to 100 percent of full load current. System shall sense compressor motor current and limit it by modulating inlet guide vanes at the compressor, overriding other controls in their ability to increase loading, but not overriding their ability to reduce loading.

M. Purge System: Chillers utilizing HCFC-123 and chillers using refrigerants with vapor pressure less than 100 kPa (14.5 psig) shall be supplied with Purge System. Purge unit shall be factory mounted, complete with necessary, piping, operating and safety controls and refrigerant service valves to isolate the unit from the chilling unit.

Purge unit shall be air, water, or refrigerant cooled. When in operation, purge system shall function automatically to remove, water vapor, and condensable gases from refrigeration system and to condense, separate, and return to system any refrigerant present therein. Purge system shall be manually or automatically started and stopped, and shall be assembled as a compact unit. As an option, a fully automatic purge system that operates continuously while main unit is operating may be furnished. Such purge system shall provide a means to signal operator of occurrence of excessive purging indicating abnormal air leakage into unit. The purge system shall be of high efficiency in recapturing the refrigerant at all load and head conditions and with capability to operate when the chiller is off. The purge unit shall be

UL listed.

N. Isolation Pads: Manufacturer’s standard.

O. Refrigerant and Oil:

1. Provide sufficient volume of dehydrated refrigerant and lubricating oil to permit maximum unit capacity operation before and during tests. Refrigerant charge lost during the warranty period due to equipment failure shall be replaced without cost to the Government.

2. The manufacturer shall certify that chiller components, such as seals, O-ring, motor windings, etc, are fully compatible with the specified refrigerants.

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P. Service valves shall be provided to facilitate refrigerant reclaim/removal required during maintenance.

Q. Controls: Chiller shall be furnished with unit mounted, stand-alone, microprocessor-based controls in NEMA 1 enclosure, hinged and lockable, factory wired with a single point power connection and separate control circuit. The control panel provide chiller operation, including monitoring of sensors and actuators, and shall be furnished with light emitting diodes or liquid-crystal display keypad.

1. The following functions shall display as a minimum:

a. Date and Time.

b. Outdoor air temperature.

c. Operating set point temperature and pressure.

d. Operating hours.

e. Operating or alarm status.

f. Chilled water temperature-entering and leaving.

g. Condenser water temperature-entering and leaving.

h. Refrigerant pressure-condenser and evaporator.

i. Low oil pump pressure.

j. High oil supply pressure.

k. Chiller diagnostic codes.

l. Current limit set point.

m. Number of compressor starts.

2. Control Functions:

a. Manual or automatic startup and shutdown time schedule.

b. Control set points for entering and leaving chilled temperatures.

c. Condenser water temperature.

d. Current/demand limit.

e. Motor load limit.

3. Safety Controls: Following conditions shall shut down the chiller and require manual reset to start:

a. High condenser pressure.

b. High oil temperature.

c. High or low oil pressure.

d. Loss of flow-condenser or chilled water.

e. Low chilled water temperature.

f. Low evaporator refrigerant temperature.

g. Sensor malfunctions.

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h. Power fault.

i. Extended compressor surge.

j. Communication loss between the chiller and its control panel. A signal shall be transmitted to Energy Control Center, if provided, for this communication loss and for any abnormal.

4. The chiller control panel shall provide a relay output to initiate system changeover to free cooling. This relay shall be energized upon initiation of free cooling at the chiller control panel.

5. Leaving chilled water temperature reset, where specified in the control sequence, shall be based on return water temperature 4-20 MA or 0-10 VDC signal from a building automation system.

6. Chillers shall be pre-wired to terminal strips for interlocked to other equipment.

7. Provide contacts for remote start/stop, alarm for abnormal operation or shut down, and for Engineering Control Center (ECC) interface.

8. Chiller control panel shall reside on the "BACnet network", provide data using open protocol network variable types and configuration properties, and BACnet interworking using ARCNET or MS/TP physical data link layer protocol for communication with building automation control system.

9. Auxiliary hydronic system and the chiller(s) shall be electronically interlocked to provide time delay and starting sequence as indicated on control drawings.

10. The chiller control panel shall utilize the following components to automatically take action to prevent unit shutdown due to abnormal operating conditions which will perform as follows.

a. High pressure switch that is set to 20 psig (adjustable setting) lower than factory pressure switch that will automatically unload the compressor to help prevent a high pressure condenser control trip. One switch is required for each compressor and indicating light shall also be provided.

b. Motor surge pressure that is set at 95 percent of compressor RLA that will automatically unload the compressor to prevent an over current trip. One protector is required for each compressor and indicating light shall also be provided.

c. Low pressure switch that is set at 5 psig above the factory low pressure switch that will automatically unload the compressor to

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23 64 00 - 10 help prevent a low evaporator temperature trip. One switch is required for each compressor and indicating light shall also be provided.

d. In all the above cases, the chiller will continue to run, in an unloaded state and will continue to produce some chilled water in an attempt to meet the cooling load. However, if the chiller reaches the trip-out limits, the chiller controls will take the chiller off line for protection, and a manual reset is required.

Once the "near trip" condition is corrected, the chiller will return to normal operation and can then produce full load cooling.

11. With variation of +/-10 percent of design flow per minute, chiller shall be able to maintain +/-0.5 degrees F leaving water temperature control. The chiller shall be able to withstand a +/- 30 percent change in flow rate per minute without unit trip. Variations in the primary flow allow for optimal system efficiency, but the chiller shall be able to maintain temperature control to help ensure occupant comfort.

12. The chiller control panel shall provide +/-0.5 degrees F leaving water temperature control during normal operation. The chiller shall provide multiple steps leaving chilled water temperature controller to minimize part load energy use and optimize leaving chilled water temperature control. If manufacturer is unable to provide at least several steps of unloading, hot gas bypass shall be required to minimize loss of leaving water temperature control.

13. The chiller control panel shall provide a 2-minute stop-to-start and

5 minute start-to-start solid state timer. If the anti-recycle timers are longer than 5 minutes, then hot-gas bypass shall be provided to limit loss of leaving chilled water temperature control in low-load conditions.

R. Motor: Refer to Section 23 05 11, COMMON WORK RESULTS FOR HVAC.

Compressor motor furnished with the chiller shall be in accordance with the chiller manufacturer and Section 23 05 12, GENERAL MOTOR

REQUIREMENTS FOR HVAC and STEAM GENERATION EQUIPMENT. Starting torque of the motor shall be suitable for the driven chiller machine.

S. Motor Starter: Refer to Section 23 05 11, COMMON WORK RESULTS FOR HVAC.

Provide a starter for each centrifugal or rotary-screw chiller in NEMA

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1 enclosure, designed for floor or unit mounting. For floor mounted starter provide wiring from starter to chiller. Starter shall be a variable frequency drive type. Provide starter with the following features in addition to the ones specified in Section 26 29 11, MOTOR

CONTROLLERS.

1. Starter shall include incoming line provision for the number and size cables shown on the contract drawings. Incoming line lugs shall be copper mechanical type.

2. Terminals connection pads shall be provided to which customers supply lugs can be attached.

3. Starters shall be coordinated with chiller packages(s) making certain all terminals are properly marked according to the chiller manufacturer’s wiring diagram.

4. Contactors shall be sized per NEMA requirements to the chillers for full load currents.

5. Ammeter(s) shall be provided, capable of displaying current to all three phases. Ammeter shall be calibrated so that inrush current can be indicated.

6. Chiller starter shall include an advanced motor protection system incorporating electronic three phase overloads and current transformers. This electronic motor protection system shall monitor and protect against the following conditions:

a. Three phase loss with under and over voltage protection.

b. Phase imbalance.

c. Phase reversal.

d. Motor overload.

e. Motor overload protection incorrectly set.

f. Momentary power loss protection with auto restart consisting of three phase current sensing device that monitor the status of the current.

g. Starter contactor fault protection.

h. Starter transition failure.

i. Distribution fault protection.

7. When a motor driven oil pump is furnished, provide a 120-volt control circuit, mounted within starter enclosure. When an oil pump starter is provided at the refrigeration machine, provide fused disconnect in star delta starter for oil pump.

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8. The starter shall be equipped with pilot relays to initiate the start sequence of compressor. These relays shall be a self-monitoring safety circuit, which shall indicate improper operation (slow operation, welding of contacts, etc) and shall cause the chiller unit to be shut down and a fault trip indicator be displayed. The "starter circuit fault" indicator shall be located in the door of the enclosure and shall require manual reset.

9. A lockout transition safety circuit shall be provided to prevent damage from prolonged energization due to malfunction of the transistor contactor. Malfunction shall cause the chiller unit to shut down and the "starter circuit fault" indicator be displayed.

10. A permanent nameplate shall be provided and mounted on the starter panel. It shall identify the manufacturer, serial or model number identifying the date of manufacturing and component replacement parts, and all current and voltage rating, and as built wiring schematic showing all items provided.

11. Provide non-fused main power disconnect switch.

2.2 REFRIGERANT MONITORING AND SAFETY EQUIPMENT

A. General: Provide refrigerant monitoring sensor/alarm system and safety equipment as specified here. Refrigerant sensor and alarm system shall comply with ASHRAE 15. The refrigerant monitoring system will be provided by the chiller manufacturer and shall be interfaced with the

DDC control system.

B. Refrigerant monitor shall continuously display the specific gas

(refrigerant used) concentration; shall be capable of indicating, alarming and shutting down equipment; and automatically activating ventilation system. On leak detection by refrigerant sensor(s), the following shall occur:

1. Activate machinery (chiller) room ventilation.

2. Activate visual and audio alarm inside and outside of machinery room, with beacon light(s) and horn sounds equipment room and outside equipment room door(s). Shut down combustion process where combustion equipment is employed in the machinery room.

3. Notify Engineering Control Center (ECC) of the alarm condition.

C. Refrigerant monitor shall be capable of detecting concentration of 1 part per million (ppm) for low-level detection and for ensuring the

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23 64 00 - 13 safety of operators. It shall be supplied factory-calibrated for the apparent refrigerant.

D. Monitor design and construction shall be compatible with temperature, humidity, barometric pressure, and voltage fluctuations of the machinery room operating environment.

PART 3 – EXECUTION

3.1 EXAMINATION

A. If an installation is unsatisfactory to the COR, the contractor shall correct the installation at no additional cost or time to the

Government.

B. Examine roughing-in for concrete equipment bases, anchor-bolt sizes and locations, piping and electrical to verify actual locations and sizes before chiller installation and other conditions that might affect chiller performance, maintenance, and operation. Equipment locations shown on the contract drawings are approximate. Determine exact locations before proceeding with installation.

3.2 EQUIPMENT INSTALLATION

A. Install chiller on concrete base with isolation pads or vibration isolators.

1. Concrete base is specified in Section 03 30 00, CAST-IN-PLACE

CONCRETE.

2. Vibration isolator types and installation requirements are specified in Section 23 05 41, NOISE and VIBRATION CONTROL FOR HVAC PIPING and

EQUIPMENT.

3. Anchor chiller to concrete base according to manufacturer’s written instructions.

4. Charge the chiller with refrigerant, if not factory charged.

5. Install accessories and any other equipment furnished loose by the manufacturer, including remote starter, remote control panel, and remote flow switches, according to the manufacturer written instructions and electrical requirements.

6. Chillers shall be installed in a manner as to provide easy access for tube pull and removal of compressor and motors etc.

B. Install refrigerant monitoring and safety equipment in accordance with

ASHRAE 15.

C. Install refrigerant piping as specified in Section 23 23 00, REFRIGERANT PIPING and ASHRAE 15.

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D. Install thermometers and gges as recommended by the manufacturer and/or as shown on the contract drawings.

E. Piping Connections:

1. Make piping connections to the chiller for chilled water, condenser water, and other connections as necessary for proper operation and maintenance of the equipment.

2. Make equipment connections with flanges and couplings for easy removal and replacement of equipment from the equipment room.

3. Extend vent piping from the relief valves and purge system to the outside.

3.3 STARTUP AND TESTING

A. Engage manufacturer's factory-trained representative to perform startup and testing service.

B. Inspect, equipment installation, including field-assembled components, and piping and electrical connections.

C. After complete installation startup checks, according to the manufacturers written instructions, do the following to demonstrate to the COR that the equipment operate and perform as intended.

1. Check refrigerant charge is sufficient and chiller has been tested for refrigerant leak.

2. Check bearing lubrication and oil levels.

3. Verify proper motor rotation.

4. Verify pumps associated with chillers are installed and operational.

5. Verify thermometers and gauges are installed.

6. Verify purge system, if installed, is functional and relief piping is routed outdoor.

7. Operate chiller for run-in-period in accordance with the manufacturer’s instruction and observe its performance.

8. Check and record refrigerant pressure, water flow, water temperature, and power consumption of the chiller.

9. Test and adjust all controls and safeties. Replace or correct all malfunctioning controls, safeties and equipment as soon as possible to avoid any delay in the use of the equipment.

10. Prepare a written report outlining the results of tests and inspections, and submit it to the COR.

D. Perform tests as recommended by product manufacturer and listed standards and under actual or simulated operating conditions and prove

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23 64 00 - 15 full compliance with design and specified requirements. Tests of the various items of equipment shall be performed simultaneously with the system of which each item is an integral part.

E. When any defects are detected, correct defects and repeat test at no additional cost or time to the Government.

F. The CxA will observe startup and contractor testing of selected equipment. Coordinate the startup and contractor testing schedules with the COR and CxA. Provide a minimum notice of 10 working days prior to startup and testing.

3.4 COMMISSIONING

A. Provide commissioning documentation in accordance with the requirements of Section 23 08 00, COMMISSIONING OF HVAC SYSTEMS.

B. Components provided under this section of the specification will be tested as part of a larger system.

3.5 DEMONSTRATION AND TRAINING

A. Provide services of manufacturer’s technical representative for 4 hours to instruct each VA personnel responsible in operation and maintenance of the system. Coordinate this training with that of the cooling tower, if furnished together.

B. Submit training plans and instructor qualifications in accordance with the requirements of Section 23 08 00, COMMISSIONING OF HVAC SYSTEMS.

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