VA 23 64 00-2011 PACKAGED WATER CHILLERS.pdf

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1、04-11 23 64 00 - 1 SECTION 23 64 00 PACKAGED WATER CHILLERS SPEC WRITER NOTES: 1. Delete between /-/ if not applicable to project. Also delete any other item or paragraph not applicable in the section and renumber the paragraphs. PART 1 - GENERAL 1.1 DESCRIPTION A. / Centrifugal/ Rotary-Screw/ Centr

2、ifugal or Rotary-Screw/ Scroll/ Absorption/ water-cooled chillers, complete with accessories. B. / Rotary-Screw/ Scroll/ Rotary-Screw or Scroll/ air-cooled chillers complete with accessories. 1.2 RELATED WORK A. Section 00 72 00, GENERAL CONDITIONS. B. Section 01 00 00, GENERAL REQUIREMENTS. C. Sect

3、ion 01 33 23, SHOP DRAWINGS, PRODUCT DATA, and SAMPLES. D. Section 13 05 41, SEISMIC RESTRAINT REQUIREMENTS FOR NON-STRUCTURAL COMPONENTS. E. Section 23 05 11, COMMON WORK RESULTS FOR HVAC and STEAM GENERATION. F. Section 23 21 23, HYDRONIC PUMPS. G. Section 23 05 41, NOISE and VIBRATION CONTROL FOR

4、 HVAC PIPING and EQUIPMENT. H. Section 23 23 00, REFRIGERANT PIPING. I. Section 23 21 13, HYDRONIC PIPING. J. Section 23 31 00, HVAC DUCTS and CASINGS K. Section 11 41 21, WALK-IN COOLERS and FREEZERS. L. Section 23 05 12, GENERAL MOTOR REQUIREMENTS FOR HVAC and STEAM GENERATION EQUIPMENT. M. Sectio

5、n 26 29 11, LOW-VOLTAGE MOTOR STARTERS. N. Section 23 81 00, DECENTRALIZED UNITARY HVAC EQUIPMENT. O. Section 01 91 00, GENERAL COMMISSIONING REQUIREMENTS P. Section 23 08 00, COMMISSIONING OF HVAC SYSTEMS: Requirements for commissioning, systems readiness checklists, and training. 1.3 DEFINITION A.

6、 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 Standard 135. Provided by IHSNot for Resale

7、No reproduction or networking permitted without license from IHS-,-,-04-11 23 64 00 - 2 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

8、. SPEC WRITER NOTE: SCBA (Self-Contained Breathing Apparatus) is defined below. Since SCBA is no longer required by ASHRAE 15, verify with the VAMC if SCBA(S) are required for this facility. Delete all references if not required. /E. SCBA: Self-Contained Breathing Apparatus./ 1.4 QUALITY ASSURANCE A

9、. Refer to Paragraph, QUALITY ASSURANCE, in Section 23 05 11, COMMON WORK RESULTS FOR HVAC and STEAM GENERATION, and comply with the following. B. Refer to PART 3 herein after and Section 01 00 00, GENERAL REQUIREMENTS for test performance. C. Comply with AHRI requirements for testing and certificat

10、ion of the chillers. SPEC WRITER NOTE: Verify the compressor/motor warranty with the manufacturers of the equipment being specified and edit the following accordingly. D. Refer to paragraph, WARRANTY, Section 00 72 00, GENERAL CONDITIONS, except as noted below: 1. Provide a 5-year motor, /transmissi

11、on,/ and compressor warranty to include materials, parts and labor. E. Refer to OSHA 29 CFR 1910.95(a) and (b) for Occupational Noise Exposure Standard /F. Refer to 42 CFRPublic Health, Part 84, “Approval of Respiratory Protective Devices,“ Subpart H“Self-Contained Breathing Apparatus,“ 1998./ G. Re

12、fer to ASHRAE Standard 15, Safety Standard for Refrigeration System, for refrigerant vapor detectors and monitor. 1.5 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 designat

13、ion only. B. Air Conditioning, Heating and Refrigeration Institute (AHRI): 370-01Sound Rating of Large Outdoor Refrigerating and Air-Conditioning Equipment Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-04-11 23 64 00 - 3 495-1999 (R2002)Refrigerant

14、 Liquid Receivers 550/590-03Standard for Water Chilling Packages Using the Vapor Compression Cycle 560-00Absorption Water Chilling and Water Heating Packages 575-94Methods for Measuring Machinery Sound within Equipment Space C. American Society of Heating, Refrigerating, and Air-Conditioning Enginee

15、rs (ASHRAE): ANSI/ASHRASE-15-2007Safety Standard for Mechanical Refrigeration Systems GDL 3-1996Guidelines for Reducing Emission of Halogenated Refrigerants in Refrigeration and Air-Conditioning Equipment and Systems D. American Society of Mechanical Engineers (ASME): 2007 .ASME Boiler and Pressure

16、Vessel Code, Section VIII, “Pressure Vessels - Division 1“ E. American Society of Testing Materials (ASTM): C 534/ C 534M-2008Preformed, Flexible Elastomeric Cellular Thermal Insulation in Sheet and Tubular Form C 612-04Mineral-fiber Block and Board Thermal Insulation F. National Electrical Manufact

17、uring Association (NEMA): 250-2008Enclosures for Electrical Equipment (1000 Volts Maximum) G. National Fire Protection Association (NFPA): 70-2008.National Electrical Code H. Underwriters Laboratories, Inc. (UL): 1995-2005. Heating and Cooling Equipment 1.6 SUBMITTALS A. Submit in accordance with Sp

18、ecification Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, and SAMPLES. SPEC WRITER NOTE: There could be more than one type of chillers required for the project. Edit paragraph B and associated subparagraphs to suit project requirements in the chiller selection. B. Manufacturers Literature and Data.

19、 1. / Centrifugal / rotary-screw / scroll / absorption / water chillers, including motor starters, control panels, and vibration isolators, and remote condenser data shall include the following: a. Rated capacity. Provided by IHSNot for ResaleNo reproduction or networking permitted without license f

20、rom IHS-,-,-04-11 23 64 00 - 4 b. Pressure drop. c. Efficiency at full load and part load WITHOUT applying any tolerance indicated in the AHRI 550/590/Standard. d. Refrigerant e. Fan performance (Air-Cooled Chillers only.) f. Accessories. g. Installation instructions. h. Start up procedures. i. Wiri

21、ng diagrams, including factor-installed and field-installed wiring. j. Sound/Noise data report. Manufacturer shall provide sound ratings. Noise warning labels shall be posted on equipment. /k. Self-contained breathing apparatus (SCBA)./ l. Refrigerant vapor detectors and monitors. C. Maintenance and

22、 operating manuals for each piece of equipment in accordance with Section 01 00 00, GENERAL REQUIREMENTS. 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 calibr

23、ated curves, calibration records, and data sheets for the instrumentation used in factory tests. SPEC WRITER NOTE: Show seismic restraints for Refrigeration Equipment in accordance with the latest VA Handbook H-18-8, “Seismic Design Requirements“. Delete the following paragraph if the chiller(s) is

24、located outside the seismic zone. /F. Provide seismic restraints for refrigeration equipment to withstand seismic forces. / SPEC WRITER NOTE: Chillers shall be selected on a project specific basis. In general, chillers should be selected within the following ranges: - Centrifugal(water-cooled): 200-

25、1250 tons - Rotary-Screw(water-cooled): 130-400 tons - Scroll(water-cooled): 30-200 tons - Rotary-Screw(air-cooled): 70-200 tons - Scroll(air-cooled): 20-200 tons Note: Chiller capacities shall be 200 Tons Maximum for Air-Cooled Chillers; 1,250 Tons Maximum for Water-Cooled Chillers PART 2 - PRODUCT

26、S 2.1 / CENTRIFUGAL / ROTARY-SCREW /SCROLL / WATER-COOLED WATER CHILLERS SPEC WRITER NOTES: Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-04-11 23 64 00 - 5 1. If chillers are required to operate at less than 25 percent of full unit rated capacity,

27、 specify provision for hot gas by-pass, to operate the unit stable at any stage of capacity reduction. Check with manufacturers for availability of this feature for the equipment being specified. 2. Provide marine water box for each evaporator and condenser. Make provision for space and design pipin

28、g layout. 3. Automatic tube cleaning system is not required. A. General: Chiller shall be factor-assembled and-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

29、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 th

30、e marine water boxes. B. Performance: Provide the capacity as shown on the drawings. Part load and full load efficiency ratings of the chiller shall not exceed those shown on the drawings. /If chillers are required to operate at less than 25 percent of full unit rated capacity, specify provision for

31、 hot gas by-pass, to operate the unit stable at any stage of capacity reduction./ 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 Standard 550/590. Chillers shal

32、l be AHRI stamped. Chiller efficiency shall comply with FEMP (Federal Energy Management Progress) requirements. SPEC WRITER NOTE: Specify sound pressure levels at each octave band as well as the overall A-weighted sound pressure dB(A) level. E. Acoustics: Sound pressure levels shall not exceed the f

33、ollowing specified levels. The manufacturer shall provide sound treatment if required to comply with the specified maximum levels. Testing shall be in accordance wit AHRI 575. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-04-11 23 64 00 - 6 OCTAVE

34、BAND Overall 63 125 250 500 1000 2000 4000 8000 dB(A) / / F. Hermetic or open: Chillers shall be open or hermetically sealed, using one of the following refrigerants: HCFC-123, HFC-134a or HCFC-410A. SPEC WRITER NOTE: Verify with the manufacturers for the life of bearings for the equipment being spe

35、cified. 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

36、 journal type with bronze or babbitt line steel cartridge, aluminum alloy one-piece insert type, or rolling element type / with an AFBMA L 10 life of a minimum of 200,000 hours. Rolling element bearings shall be rated in accordance with AFBMA 9 or AFBMA 11 as applicable/. Casing shall be cast iron o

37、r 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 insure lubrication of bearings prior to starting and of shaft seal both on stopping and star

38、ting, 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. C

39、apacity 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

40、or pressure sensor. H. Compressor (Rotary-Screw Type): Positive displacement oil injected type, direct drive, constructed of precision-machined cast iron housing. Shaft main bearing shall be of sleeve design, conservatively loaded, with heavy-duty steel-backed babbitt bushings, or rolling element ty

41、pe, / both rated with an L 10 life of a minimum of 200,000 hours. Rolling element bearings shall be rated in accordance with AFBMA 9 or 11/. Casing shall be cast iron, precision machined for minimum clearance Provided by IHSNot for ResaleNo reproduction or networking permitted without license from I

42、HS-,-,-04-11 23 64 00 - 7 about periphery of rotors. Lubrication system shall provide oil at proper temperature to all moving parts. Capacity control shall be by means of single slide valve to modulate the capacity from 100 to 10 percent of full unit rated capacity without unstable compressor operat

43、ion. The single slide valve shall be hydraulically operated upon the actuation of temperature or pressure sensor. I. Compressor (Scroll Type): Three dimensional, positive-displacement, hermetically sealed design, with suction and discharge valves, crankcase oil heater and suction strainer. Compresso

44、r shall be mounted on vibration isolators. Rotating parts shall be factory balanced. Lubrication system shall consist of reversible, positive displacement pump, strainer, oil level sight glass, and oil charging valve. Capacity control shall be by on-off compressor cycling of single and multiple comp

45、ressors/ and hot gas bypass /. SPEC WRITERS NOTES: 1. ASME construction for heat exchangers may not be required for chillers using low-pressure refrigerant, such as HCFC-123. Edit paragraphs J and K accordingly. J. Evaporator: Shell-and-tube type, constructed and tested and stamped in accordance wit

46、h Section VIII D1 of ASME Boiler and Pressure Vessel Code where applicable for working pressure produced by refrigerant used and water system installed, but not less than 1035 kPa (150 psig) waterside working pressure. Shell shall be fabricated of carbon steel and shall have carbon steel tube sheets

47、; drilled and reamed to accommodate the tubes. Tubes shall be externally and internally enhanced individually replaceable and shall 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 minim

48、ize tube vibration, stress, and wear. Performance shall be based on a water velocity not less than 1 m/s (3 fps) nor more then 4 m/s (12 fps), and fouling factor of 0.0000176 m2degrees C (0.0001 hr. sq. ft. degrees F/Btu). Removable marine water box shall be constructed of steel. Design working pres

49、sure shall be / 1035 kPa (150 psig) / 2070 kPa (300 psig); / pressure tested at 130 percent of working pressure. Water nozzle connections shall be flanged. K. Condenser: Shell-and-tube type, constructed, tested, and stamped in accordance with applicable portions of Section VIII D1 of the ASME Boiler and Pressure Vessel Code, where applic