VA 23 81 46-2011 WATER-SOURCE UNITARY HEAT PUMPS.pdf

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1、04-11 23 81 46 - 1 SECTION 23 81 46 WATER-SOURCE UNITARY HEAT PUMPS 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. 2. This section may not include every possible type of heat pu

2、mp. Edit and add to the section equipment, as required, to meet the specific-project needs. PART 1 - GENERAL 1.1 DESCRIPTION A. This section specifies the following configurations of electrically operated “Water-Source Unitary Heat Pumps“ 1. Water source unitary heat pumps smaller than 21 KW (6 Tons

3、. 2. Concealed water source heat pumps larger than 21 kW (6 Tons). 3. Vertical stack water source heat pumps. 4. Roof-top and unit ventilator types (Not specified below) B. Definitions: 1. Coefficient of Performance (COP) - Cooling: The ratio of the rate of the heat removed to the rate of energy inp

4、ut in consistent units, for a complete refrigerating system or some specific portion of that system under designated operating conditions. 2. Coefficient of Performance (COP) - Heating: The ratio of the rate of heat delivered to the rate of energy input is consistent units for a complete heat pump s

5、ystem, including the compressor and, if applicable, auxiliary heat under designated operating conditions. 3. Energy Efficiency Ratio (EER): The ratio of net cooling capacity in Btu/h to total rate of electricity input in watts under designated operating conditions. 4. Seasonal Energy Efficiency Rati

6、o (SEER): The ratio of net cooling capacity in Btu/h to total rate of electricity input in watts over a typical cooling season. 5. Heating Season Performance Factor (HSPF): The ratio of the net heating capacity in Btu/h to total rate of electricity input in watts over a typical heating season. 6. En

7、ergy-Star Ratings: Energy-Star is a government-backed labeling program that helps people and organizations save money and reduce greenhouse gas emissions by identifying factories, office equipment, home appliances and electronics that have superior energy efficiency. Provided by IHSNot for ResaleNo

8、reproduction or networking permitted without license from IHS-,-,-04-11 23 81 46 - 2 7. Unitary Water-Cooled Heat Pump: One or more factory made assemblies that normally include an indoor conditioning coil, compressor(s) and an outdoor refrigerant-to-water heat exchanger. These units provide both he

9、ating and cooling functions. 8. FEMP: Federal Energy Management Program 9. Extended Range Heat Pumps (Ground-Source/Ground-Coupled): Heat pumps designed to use with extended operating range of entering water temperature from -1 C (30 F) to 49 C (120 F) 1.2 RELATED WORK A. Section 01 00 00, GENERAL R

10、EQUIREMENTS: For pre-test requirements. B. Section 13 05 41, SEISMIC RESTRAINT REQUIREMENTS FOR NON-STRUCTURAL COMPONENTS: Seismic requirements for non-structural equipment. C. Section 23 05 11, COMMON WORK RESULTS FOR HVAC: General mechanical requirements and items, which are common to more than on

11、e section of Division 23. D. Section 23 23 00, REFRIGERANT PIPING: Requirements for field refrigerant piping. E. Section 23 21 13, HYDRONIC PIPING and Section 23 22 13, STEAM and CONDENSATE HEATING PIPING: Requirements for piping for split systems and expansion tanks. F. Section 23 31 00, HVAC DUCTS

12、 and CASINGS: Requirements for sheet metal ductwork. G. Section 23 09 23, DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC: Requirements for controls and instrumentation. H. Section 23 05 93, TESTING, ADJUSTING, and BALANCING FOR HVAC: Requirements for testing, adjusting and balancing of HVAC system. I. Secti

13、on 23 08 00 COMMISSIONING OF HVAC SYSTEMS: Requirements for commissioning, systems readiness checklists, and training. J. Section 01 91 00 GENERAL COMMISSIONING REQUIREMENTS 1.3 QUALITY ASSURANCE: A. Refer to specification Section 23 05 11, COMMON WORK RESULTS FOR HVAC. B. Comply with ASHRAE Standar

14、d 15, Safety Code for Mechanical Refrigeration. C. Comply with ASHRAE 90.1-2010. 1.4 SUBMITTALS A. Submit in accordance with specification Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, and SAMPLES. B. Manufacturers Literature and Data. 1. Water Source Unitary Heat Pumps: a. Less than 21 KW (6 Tons)

15、 b. Larger than 21 KW (6 Tons) - Concealed Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-04-11 23 81 46 - 3 c. Vertical stack d. Roof-top and unit ventilator types (Not specified below) C. Certification: Submit, simultaneously with shop drawings, a

16、 proof of certification that this product has been certified by AHRI. D. Performance Rating: Submit catalog selection data showing equipment ratings and compliance with required cooling and heating capacities EER and COP values as applicable. E. Completed System Readiness Checklists provided by the

17、Commissioning Agent 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. 1.5 APPLICABLE PUBLICATIONS: A. The publications listed below form a part of this specific

18、ation to the extent referenced. The publications are referenced in the text by the basic designation only. B. Federal Specification (Fed. Spec.): A-A-50502-90 . Air-conditioner (UNITARY HEAT PUMP), AIR TO AIR (3000 TO 300,000 BTUH) C. Air-Conditioning, Heating and Refrigeration Institute (AHRI) Stan

19、dards: AHRI-DCPP Directory of Certified Product Performance - Applied Directory of Certified Products 210/240-08 . Performance Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment 270-08 . Sound Rating of Outdoor Unitary Equipment 310/380-04 . Standard for Packaged Terminal Air-Cond

20、itioners and Heat Pumps (CSA-C744-04) 320-98 . Water-Source Heat Pumps 325-98 . Ground Water-Source Heat Pumps/ 330-98 . Ground Source Closed-Loop Heat Pumps/ 340/360-07 . Commercial and Industrial Unitary Air-Conditioning and Heat Pump Equipment D. Air Movement and Control Association (AMCA): 210-0

21、7 . Laboratory Methods of Testing Fans for Aerodynamic Performance Rating (ANSI) 410-96 . Recommended Safety Practices for Users and Installers of Industrial and Commercial Fans E. American National Standards Institute (ANSI): S12.51-02 (R2007) Acoustics - Determination of Sound Power Levels of Nois

22、e Sources Using Sound Pressure - Precision Method for Reverberation Rooms (same as ISO 3741:1999) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-04-11 23 81 46 - 4 F. American Society of Heating, Refrigerating and Air-Conditioning Engineers Inc (ASH

23、RAE): 15-10 Safety Standard for Refrigeration Systems (ANSI) 62.1-10 Ventilation for Acceptable Indoor Air Quality (ANSI) 90.1-10 Energy Standard for Buildings except Low-Rise Residential Buildings 2008 Handbook HVAC Systems and Equipment G. American Society of Testing and Materials (ASTM): B117-09

24、Standard Practice for Operating Salt Spray (Fog) Apparatus H. National Electrical Manufacturers Association (NEMA): MG 1-09 (R2010) Motors and Generators (ANSI) ICS 1-00 (R2005) . Industrial Controls and Systems: General Requirements I. National Fire Protection Association (NFPA): 90A-09 . Standard

25、for the Installation of Air-Conditioning and Ventilating Systems J. Underwriters Laboratory (UL): 1995-05 Heating and Cooling Equipment PART 2- PRODUCTS SPEC WRITER NOTE: Provide “Extended Range” units ground source heat pumps. 2.1 GENERAL REQUIREMENTS FOR WATER SOURCE HEAT PUMPS A. System Character

26、istics of a Closed-Loop System: The system consists of multiple units connected to a 2-pipe, closed-loop hydronic system with continuous water circulation. The temperature of the water loop shall be maintained at approximately 18-35 degrees C (65-95 degrees F) by means of addition of heat and heat r

27、ejection when needed. /B. System Characteristics of a Ground Source Closed-Loop System: The system consists of multiple units connected to a 2-pipe, closed-loop hydronic system with continuous water circulation. The temperature of the water loop shall be maintained between approximately -1 and 49 de

28、grees C (30-120 degrees F) by means of heat addition or heat rejection into the ground loop. /C. System Characteristics of a Ground Source Open-Loop System: The system consists of multiple units connected to a 2-pipe, open-loop hydronic system with continuous water circulation. The temperature of th

29、e water loop shall be operating over an extended range, -1 and 49 degrees C (30-120 degrees F), by means of heat addition or heat rejection directly into the ground water. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-04-11 23 81 46 - 5 D. Applicab

30、le AHRI Standards: Units shall be listed in the corresponding AHRI Directory of certified Products shown in paragraph APPLICABLE PUBLICATIONS. E. The water-source heat pumps are available in different configurations, such as, console type, horizontal or vertical stacked type), roof-top, and unit ven

31、tilator type. Refer to DESIGNER NOTE 2 above to edit and make changes as required. SPEC WRITER NOTE: For high-humidity locations (VA HVAC Design Manual), provide E-coated aluminum fins and corrosion-resistant cabinets. F. Corrosion Protection: 1. Remote Outdoor Condenser Coils: Epoxy Immersion Coati

32、ng Electrically Deposited: The multi-stage corrosion-resistant coating application comprises of cleaning (heated alkaline immersion bath) and reverse-osmosis immersion rinse prior to the start of the coating process. The coating thickness shall be maintained between 0.6-mil and 1.2-mil. Before the c

33、oils are subjected to high-temperature oven cure, they are treated to permeate immersion rinse and spray. Where the coils are subject to UV exposure, UV protection spray treatment comprising of UV-resistant urethane mastic topcoat shall be applied. Provide complete coating process traceability for e

34、ach coil and minimum five years of limited warranty. The coating process shall be such that uniform coating thickness is maintained at the fin edges. The quality control shall be maintained by ensuring compliance to the applicable ASTM Standards for the following: a. Salt Spray Resistance (Minimum 6

35、,000 Hours) b. Humidity Resistance (Minimum 1,000 Hours) c. Water Immersion (Minimum 260 Hours) d. Cross-Hatch Adhesion (Minimum 4B-5B Rating) e. Impact Resistance (Up to 160 Inch/Pound) 2. Exposed Outdoor Cabinet: Casing Surfaces (Exterior and Interior): All exposed and accessible metal surfaces sh

36、all be protected with a water-reducible acrylic with stainless steel pigment spray-applied over the manufacturers standard finish. The spray coating thickness shall be 2-4 mils and provide minimum salt-spray resistance of 1,000 hours (ASTM B117) AND 500 hours UV resistance (ASTM D4587) 2.2 WATER SOU

37、RCE UNITARY HEAT PUMP (WSHP) LESS THAN 21 KW (6 TONS) A. Description: Packaged water-source heat pump with temperature controls; and shall be factory assembled, tested, and rated according to AHRI-ISO-13256-1. Unit shall be / floor mounted console type with integral inlet Provided by IHSNot for Resa

38、leNo reproduction or networking permitted without license from IHS-,-,-04-11 23 81 46 - 6 and discharge grilles for free air delivery / or/ horizontal / type, with inlet and outlet duct connections. Comply with AHRI 320. B. Cabinet: Manufacturers standard galvanized steel /for ducted models /and /ga

39、lvanized steel with baked enamel finish for console models. Units shall have access panels/, and ducted models shall have flanged duct connections. Cabinet shall be factory insulated with fiber glass duct liner, minimum 13 mm (1/2-inch) thick and complying with UL 181. Units shall have knockouts for

40、 electrical, piping, and condensate drain connections. C. Fan: /1. Housed Centrifugal Fan Direct driven, centrifugal, with permanently lubricated multi-speed motor resiliently mounted in fan inlet / /2. Plenum Fan(s) / Direct-driven, aluminum wheel, plenum fans mounted in Arrangement 4, and equipped

41、 with variable speed drives. Maximum number of fans in a single array shall not exceed four. / D. Compressor: Hermetic, / rotary / scroll / compressor installed on vibration isolators; with a slide-out chassis and housed in an acoustically treated enclosure. Unit shall have factory-installed safetie

42、s, anti-recycle timer, high-pressure cutout, low-pressure cutout or loss-of-charge switch, internal thermal-overload protection, and freeze stat to stop compressor if water-loop temperature in refrigerant-to-water heat exchanger falls below 2 deg C (35 deg F). Condensate overflow switch shall stop c

43、ompressor with high condensate level in condensate drain pan. Compressor lockout circuit shall be capable of being reset at either remote thermostat or circuit breaker. E. Refrigerant Piping Materials: ASTM B 743 copper tube with wrought-copper fittings and brazed joints. F. Pipe Insulation: Refrige

44、rant minimum 10-mm (3/8-inch) thick, flexible elastomeric insulation on piping exposed to airflow through the unit. Maximum 25/50 flame-spread/smoke-development indexes according to ASTM E 84. SPEC WRITER NOTE: Choose from the following two paragraphs. /G. Refrigerant Metering Device: Thermal expans

45、ion valve to allow specified operation with entering-water temperatures from 18 to 38 deg C (65 to 100 deg F). Capillary tubes may be used only when unit is furnished with water-regulating valve. / /H. Refrigerant Metering Device: Furnish with thermal expansion valve to allow specified operation wit

46、h entering-water temperatures from minus 4 to plus 52 deg C (25 to 125 deg F). / Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-04-11 23 81 46 - 7 I. Condensate Drainage: Plastic or stainless-steel drain pan with condensate drain piping projecting t

47、hrough unit cabinet and complying with ASHRAE 62.1-2010. J. Airstream Surfaces: Surfaces in contact with the airstream shall comply with requirements in ASHRAE 62.1-2010. K. Sound Attenuation Package: Minimum 1-mm (0.06-inch) thick compressor enclosure and front panel. Minimum 2-mm (0.12-inch) thick

48、 foam gasket around the compressor and perimeter of end panel, sound attenuating blanket over compressor and hot-gas muffler /. L. General Motor Requirements: Comply with requirements in Section 23 05 12, GENERAL MOTOR REQUIREMENTS FOR HVAC and STEAM GENERATION EQUIPMENT. Motor shall be multispeed,

49、permanently lubricated, / permanent split capacitor / ECM /. SPEC WRITER NOTES: The standard heat exchanger is copper with the optional cupronickel for open loop type systems or projects where superior corrosion protection is desired (i.e.; poor local water quality). Stainless steel should only be used where extremely poor water conditions exist or superior corrosion prote