VA 23 81 00-2011 DECENTRALIZED UNITARY HVAC EQUIPMENT.pdf

1、02-11 238100-1 SECTION 23 81 00 DECENTRALIZED UNITARY HVAC EQUIPMENT SPEC WRITER NOTE: 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. This section specifies / s

2、elf-contained, / split-systems, / rooftop, / room-type, / and / through-the-wall packaged terminal / air conditioners/and gas-fired furnaces/. B. Definitions: 1. Energy Efficiency Ratio (EER): The ratio of net cooling capacity is Btu/h to total rate of electricity input in watts under designated ope

3、rating conditions (Btu hour/Watt). 2. Seasonal Energy Efficiency Ratio (EER): The ratio of the total cooling output of an air conditioner during its normal annual usage period for cooling in Btu/h divided by total electric energy input in watts during the same period (Btu hour/Watt). 3. Unitary: A U

4、nitary Air Conditioner consists of one or more factory-made assemblies which normally include an evaporator or cooling coil, a compressor and condenser combination, and may include a heating function as well. 4. Where such equipment is provided in more than one assembly the separated assemblies are

5、to be designed to be used together and the requirements of rating are based upon use of matched assemblies. 1.2 RELATED WORK /A. Section 01 00 00, GENERAL REQUIREMENTS: Requirements for pre-test of equipment: Seismic requirements for non-structural equipment./ B. Section 23 05 11, COMMON WORK RESULT

6、S FOR HVAC: General mechanical requirements and items, which are common to more than one section of Division 23. C. Section 23 05 41, NOISE and VIBRATION CONTROL FOR HVAC PIPING and EQUIPMENT: Requirements for different types of vibration isolators and noise ratings in the occupied areas. D. Section

7、 23 07 11, HVAC and BOILER PLANT INSULATION: Requirements for piping insulation. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-11 238100-2 E. Section 23 23 00, REFRIGERANT PIPING: Requirements for refrigerant pipes and fittings. F. Section 23 36

8、 00, AIR TERMINAL UNITS and Section 23 82 00, CONVECTION HEATING and COOLING UNITS: Requirements for other similar units. G. Section 23 73 00, INDOOR CENTRAL-STATION AIR-HANDLING UNITS: Requirements for air handling units using chilled water and hot water coils. H. Section 23 74 13, PACKAGED, OUTDOO

9、R, CENTRAL-STATION AIR-HANDLING UNITS: Requirements for air handling units using chilled water and hot water coils. I. Section 23 40 00, HVAC AIR CLEANING DEVICES: Requirements for air filtration. J. Section 23 08 00 COMMISSIONING OF HVAC SYSTEMS: Requirements for commissioning, systems readiness ch

10、ecklists, and training. /K. Section 23 81 23, COMPUTER-ROOM AIR-CONDITIONERS: Requirements for computer room units./ /L. Section 23 05 93, TESTING, ADJUSTING, and BALANCING FOR HVAC: Requirements for testing and adjusting air balance./ 1.3 QUALITY ASSURANCE A. Refer to specification Section 23 05 11

11、, COMMON WORK RESULTS FOR HVAC. B. Safety Standards: ASHRAE Standard 15, Safety Code for Mechanical Refrigeration. 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. Sufficient information, inc

12、luding capacities, pressure drops and piping connections clearly presented, shall be included to determine compliance with drawings and specifications for units noted below: a. Unitary air conditioners: 1) Self-contained units 2) Split systems 3) Rooftop units b. Window air conditioners c. Through-t

13、he-wall packaged terminal air conditioning units d. Gas-Fired Furnaces 2. Unit Dimensions required clearances, operating weights accessories and start-up instructions. 3. Electrical requirements, wiring diagrams, interlocking and control wiring showing factory installed and portions to be field inst

14、alled. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-11 238100-3 4. Mounting and flashing of the roof curb to the roofing structure with coordinating requirements for the roof membrane system. C. Certification: Submit proof of specified ARI Cert

15、ification. D. Performance Rating: Submit catalog selection data showing equipment ratings and compliance with required sensible-to-heat-ratio, energy efficiency ratio (EER), and coefficient of performance (COP). E. Operating and Maintenance Manual: Submit three copies of Operating and Maintenance ma

16、nual to Resident Engineer three weeks prior to final inspection. F. Completed System Readiness Checklists provided by the 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

17、 COMMISSIONING OF HVAC SYSTEMS. 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 designation only. B. Federal Specifications (Fed. Spec.): A-A-50502-90 Air conditioner (Un

18、itary Heat Pump) Air to Air (3000-300,000 Btu) C. Military Specifications (Mil. Specs.): MIL-PRF-26915D-06.Primer Coating, for Steel Surfaces D. Air-Conditioning, Heating, and Refrigeration Institute (AHRI): 210/240-08Performance Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment

19、270-08Sound Rating of Outdoor Unitary Equipment 310/380-04Standard for Packaged Terminal Air-Conditioners and Heat Pumps (CSA-C744-04) 340/360-07Performance Rating of Commercial and Industrial Unitary Air-Conditioning and Heat Pump Equipment 520-04Performance Rating of Positive Displacement Condensi

20、ng Units E. Air Movement and Control Association (AMCA): 210-07Laboratory Methods of Testing Fans for Aerodynamic Performance Rating (ANSI) 410-96Recommended Safety Practices for Users and Installers of Industrial and Commercial Fans F. American National Standards Institute (ANSI): S12.51-02(R2007)A

21、coustics - Determination of Sound Power Levels of Noise Sources Using Sound Pressure - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-11 238100-4 Precision Method for Reverberation Rooms (same as ISO 3741:1999) G. American Society of Heating, Ref

22、rigerating, and Air-Conditioning Engineers (ASHRAE): 2008 Handbook.HVAC Systems and Equipment 15-10.Safety Standard for Refrigeration Systems (ANSI) H. American Society of Testing and Materials (ASTM): B117-09.Standard Practice for Operating Salt Spray (Fog) Apparatus I. American Society of Civil En

23、gineers (ASCE) ASCE 7-10.Minimum Design Loads for Buildings and Other Structures J. National Electrical Manufacturers Association (NEMA): MG 1-09 (R2010).Motors and Generators (ANSI) ICS 1-00 (R2005, R2008).Industrial Controls and Systems: General Requirements K. National Fire Protection Association

24、 (NFPA) Publications: 90A-09Standard for the Installation of Air-Conditioning and Ventilating Systems PART 2 - PRODUCTS 2.1 UNITARY AIR CONDITIONERS - GENERAL A. Applicable ARI Standards: 1. Cooling Capacity 39.6 kW (135,000 Btu/h) and More: AHRI 340/ 360. 2. Cooling Capacity Less Than 39.6 kW (135,

25、000 Btu/h): AHRI 210/240. Units shall be listed in the ARI Directory of Certified Unitary Air-Conditioners. B. Performance Rating: Cooling capacity of units shall meet the sensible heat and total heat requirements shown in the contract documents. In selecting unit size, make true allowance for “sens

26、ible to total heat ratio“ to satisfy required sensible cooling capacity. C. Machinery Guards: Provide guards as shown in AMCA 410 for belts, chains, couplings, pulleys, sheaves, shafts, gears and other moving parts regardless of height above the floor. Drive guards may be excluded where motors and d

27、rives are inside factory fabricated casings. DESIGNERS NOTE: See HVAC Design Manual Appendix 7-A Table 7-A1 for high humidity areas. D. Corrosion Prevention: Unless specified otherwise, equipment fabricated from ferrous metals that do not have a zinc coating or a duplex coating of zinc and paint sha

28、ll be treated for prevention of rust with a factory Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-11 238100-5 coating or paint system that will withstand 125 hours in a salt-spray fog test, except that equipment located outdoors shall be tested

29、for 500 hours. The salt-spray fog test shall be in accordance with ASTM B117 using a 20 percent sodium chloride solution. Immediately after completion of the test, the coating shall show no signs of blistering, wrinkling or cracking, no loss of adhesion, and the specimen shall show no signs of rust

30、beyond 3 mm (1/8-inch) on both sides from the scratch mark. /For units located in high humidity areas, provide factory-coated coils for protection from corrosion by using multiple stage electro-deposition coating process. Refer to Drawings and Section 23 82 16, AIR COILS, for additional coil require

31、ments./ 2.2 SELF-CONTAINED AIR CONDITIONERS A. Description: Factory assembled and wired consisting of the following: 1. Cabinet. 2. Compressor. 3. Evaporator fan. 4. Evaporator coil, 5. Integral / air-cooled / water-cooled / condenser. 6. / Steam / Hot-water / Electric-resistance / heating coil. 7.

32、Air filters. 8. Controls. 9. Full charge of refrigerant and oil. B. Cabinet Frame and Panels: Structural-steel frame with galvanized-steel panels with baked-enamel finish in color selected by Architect, and with access doors or panels. 1. Insulation: Minimum 25-mm (1-inch) thick, / neoprene coated/

33、aluminum foil faced/ glass fiber duct liner on cabinet interior and control panel. 2. Drain Pan: / Galvanized steel with corrosion-resistant coating / Molded corrosion-resistant material/ Stainless steel / insulated/ complying with ASHRAE 62.1-2007. 3. Isolation: Spring isolators for mounting under

34、base of unit, with minimum static deflection of 25 mm (1 inch). 4. Discharge Plenum: / Cabinet extension with directional louvers. / Cabinet extension with duct openings for supply air, and lined with a minimum of 50-mm (2-inch) thick duct liner /. 5. Corrosion-Resistant Treatment: Phenolic coating

35、on unit interior and exterior. 6. Airstream Surfaces: Surfaces in contact with the airstream shall comply with requirements in ASHRAE 62.1-2007. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-11 238100-6 C. Evaporator Fan: Galvanized steel, doubl

36、e-width, double-inlet, / forward-curved / airfoil / centrifugal fan; statically and dynamically balanced. / Direct / Belt / drive, with fan mounted on permanently lubricated bearings and having cast-iron or steel sheaves, dynamically balanced, bored to fit shafts and keyed. Motor sheaves shall be va

37、riable and adjustable pitch selected so required rpm are obtained when set at middle position. Fan and motor shall be resiliently mounted with ratings as recommended by the manufacturer with a minimum of one and one-half times nameplate rating of motor. Bearings shall be grease lubricated with greas

38、e lines extended to exterior of unit. Variable-air volume units shall have variable frequency drives with adjustable, static-pressure controller responding to a static-pressure sensor and variable-frequency motor controller. D. Fan Motors: Comply with requirements in Section 23 05 12, GENERAL MOTOR

39、REQUIREMENTS FOR HVAC and STEAM GENERATION EQUIPMENT and shall be / multi-speed, PSC type / open dripproof / totally enclosed fan cooled /, premium efficiency./ E. Isolation: Mount fan and motor on common sub-base and mount assembly on spring isolators with minimum static deflection of 25 mm (1 inch

40、) unless otherwise indicated. F. Compressor hermetically sealed, scroll, 3600 rpm maximum, and resiliently mounted with positive lubrication and internal motor protection. /Furnish each compressor with independent refrigeration circuits./ G. Evaporator Coil: Direct-Expansion Coil: Seamless copper tu

41、bes expanded into aluminum fins/ with interlaced circuiting/: 1. Corrosion-Resistant Treatment: Phenolic coating applied with multiple dips and baked. /For units located in high humidity areas, provide factory-coated coils for protection from corrosion by using multiple stage electro-deposition coat

42、ing process. Refer to Drawings and Section 23 82 16, AIR COILS, for additional coil requirements./ H. Refrigerant Circuits: A separate circuit for each compressor, with externally equalized thermal-expansion valve with / adjustable superheat /, filter-dryer, sight glass, high-pressure relief valve,

43、and charging valves. I. Water-Cooled Condenser: Copper tubes in steel shell with removable heads, for 2760-kPa (400-psig) waterside working pressure. 1. ASME Compliance: For units larger than 15 tons fabricate and label water-cooled condensers to comply with ASME Boiler and Pressure Vessel Code: Sec

44、tion VIII, “Pressure Vessels,“ Division 1. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-11 238100-7 2. Water-Flow Switch. J. Remote Air-Cooled Condenser: Factory assembled and tested; consisting of condenser coil, fans and motors, and operating

45、 controls; and suitable for roof mounting. 1. Condenser Coil: Aluminum-fin copper tube with integral subcooler; leak tested to 3110 kPa (450 psig). /For units located in high humidity areas, provide factory-coated coils for protection from corrosion by using multiple stage electro-deposition coating

46、 process. Refer to Drawings and Section 23 82 16, AIR COILS, for additional coil requirements./ 2. Condenser Fans: Direct-drive propeller type. 3. Fan Motors: Three-phase/or single phase/, permanently lubricated, ball-bearing motors with built-in thermal-overload protection. Comply with requirements

47、 in Section 23 05 12, GENERAL MOTOR REQUIREMENTS FOR HVAC and STEAM GENERATION EQUIPMENT. /4. Furnish low ambient controls to allow stable operation down to minus 18 degrees C (0 degrees F)./ K. Refrigerant Line Kits: Annealed-copper suction and liquid lines that are factory cleaned, dried, pressuri

48、zed, and sealed; insulated suction line; flared fittings at evaporator end, no fitting at condenser end; and service valves for both suction and liquid lines. L. Integral Air-Cooled Condenser for Units 52.8 kW (15 tons) and Smaller. Factory assembled and tested; consisting of condenser coil, fans an

49、d motors, and cabinet: 1. Condenser Coil: Aluminum-fin copper tube with integral subcooler; leak tested to 2930 kPa (425 psig). /For units located in high humidity areas, provide factory-coated coils for protection from corrosion by using multiple stage electro-deposition coating process. Refer to Drawings and Section 23 82 16, AIR COILS, for additio