VA 23 34 00-2009 HVAC FANS.pdf

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1、11-09 23 34 00 - 1 SECTION 23 34 00 HVAC FANS 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. Fans for heating, ventilating and air condition

2、ing. B. Product Definitions: AMCA Publication 99, Standard l-66. 1.2 RELATED WORK A. Section 01 00 00, GENERAL REQUIREMENTS. B. Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES. C. Section 13 05 41, SEISMIC RESTRAINT REQUIREMENTS FOR NON-STRUCTURAL COMPONENTS. D. Section 23 05 11, COMMON W

3、ORK RESULTS FOR HVAC AND STEAM GENERATION. E. Section 23 05 12, GENERAL MOTOR REQUIREMENTS FOR HVAC AND STEAM GENERATION EQUIPMENT. F. Section 23 05 41, NOISE AND VIBRATION CONTROL FOR HVAC PIPING AND EQUIPMENT. G. Section 23 05 93, TESTING, ADJUSTING, AND BALANCING FOR HVAC. H. Section 23 09 23, DI

4、RECT-DIGITAL CONTROL SYSTEM FOR HVAC. I. Section 23 73 00, INDOOR CENTRAL-STATION AIR-HANDLING UNITS. J. Section 23 82 16, AIR COILS. K. Section 26 29 11, LOW-VOLTAGE MOTOR STARTERS. 1.3 QUALITY ASSURANCE A. Refer to paragraph, QUALITY ASSURANCE, in Section 23 05 11, COMMON WORK RESULTS FOR HVAC AND

5、 STEAM GENERATION. B. Fans and power ventilators shall be listed in the current edition of AMCA 26l, and shall bear the AMCA performance seal. C. Operating Limits for Centrifugal Fans: AMCA 99 (Class I, II, and III). D. Fans and power ventilators shall comply with the following standards: l. Testing

6、 and Rating: AMCA 2l0. 2. Sound Rating: AMCA 300. E. Vibration Tolerance for Fans and Power Ventilators: Section 23 05 41, NOISE AND VIBRATION CONTROL FOR HVAC PIPING AND EQUIPMENT. F. Performance Criteria: Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS

7、-,-,-11-09 23 34 00 - 2 l. The fan schedule shall show the design air volume and static pressure. Select the fan motor HP by increasing the fan BHP by 10 percent to account for the drive losses and field conditions. 2. Select the fan operating point as follows: a. Forward Curve and Axial Flow Fans:

8、Right hand side of peak pressure point b. Air Foil, Backward Inclined, or Tubular: At or near the peak static efficiency G. Safety Criteria: Provide manufacturers standard screen on fan inlet and discharge where exposed to operating and maintenance personnel. H. Corrosion Protection: 1. Except for f

9、ans in fume hood exhaust service, all steel shall be mill-galvanized, or phosphatized and coated with minimum two coats, corrosion resistant enamel paint. Manufacturers paint and paint system shall meet the minimum specifications of: ASTM D1735 water fog; ASTM B117 salt spray; ASTM D3359 adhesion; a

10、nd ASTM G152 and G153 for carbon arc light apparatus for exposure of non-metallic material. 2. Fans for general purpose fume hoods, or chemical hoods, and radioisotope hoods shall be constructed of materials compatible with the chemicals being transported in the air through the fan. I. Spark resista

11、nt construction: If flammable gas, vapor or combustible dust is present in concentrations above 20% of the Lower Explosive Limit (LEL), the fan construction shall be as recommended by AMCAs Classification for Spark Resistant Construction. Drive set shall be comprised of non-static belts for use in a

12、n explosive. 1.4 SUBMITTALS A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, and SAMPLES. B. Manufacturers Literature and Data: l. Fan sections, motors and drives. 2. Centrifugal fans, motors, drives, accessories and coatings. a. In-line centrifugal fans. b. Tubular Centri

13、fugal Fans. c. Up-blast kitchen hood exhaust fans. d. Industrial fans. e. Utility fans and vent sets. 3. Prefabricated roof curbs. 4. Power roof and wall ventilators. 5. Centrifugal ceiling fans. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-11-09

14、23 34 00 - 3 6. Propeller fans. 7. Packaged hood make-up air units. 8. Vane axial fans. 9. Tube-axial fans. 10. Air curtain units. C. Certified Sound power levels for each fan. D. Motor ratings types, electrical characteristics and accessories. E. Roof curbs. F. Belt guards. G. Maintenance and Opera

15、ting manuals in accordance with Section 01 00 00, GENERAL REQUIREMENTS. H. Certified fan performance curves for each fan showing cubic feet per minute (CFM) versus static pressure, efficiency, and horsepower for design point of operation. 1.5 APPLICABLE PUBLICATIONS A. The publications listed below

16、form a part of this specification to the extent referenced. The publications are referenced in the text by the basic designation only. B. Air Movement and Control Association International, Inc. (AMCA): 99-86.Standards Handbook 2l0-06Laboratory Methods of Testing Fans for Aerodynamic Performance Rat

17、ing 26l-09Directory of Products Licensed to bear the AMCA Certified Ratings Seal - Published Annually 300-08Reverberant Room Method for Sound Testing of Fans C. American Society for Testing and Materials (ASTM): B117-07aStandard Practice for Operating Salt Spray (Fog) Apparatus D1735-08Standard Prac

18、tice for Testing Water Resistance of Coatings Using Water Fog Apparatus D3359-08Standard Test Methods for Measuring Adhesion by Tape Test G152-06.Standard Practice for Operating Open Flame Carbon Arc Light Apparatus for Exposure of Non-Metallic Materials G153-04.Standard Practice for Operating Enclo

19、sed Carbon Arc Light Apparatus for Exposure of Non-Metallic Materials D. National Fire Protection Association (NFPA): Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-11-09 23 34 00 - 4 NFPA 96-08Standard for Ventilation Control and Fire Protection of

20、 Commercial Cooking Operations E. National Sanitation Foundation (NSF): 37-07.Air Curtains for Entrance Ways in Food and Food Service Establishments F. Underwriters Laboratories, Inc. (UL): 181-2005Factory Made Air Ducts and Air Connectors 1.6 EXTRA MATERIALS A. Provide one additional set of belts f

21、or all belt-driven fans. PART 2 - PRODUCTS 2.1 FAN SECTION (CABINET FAN) Refer to specification Section 23 73 00, INDOOR CENTRAL-STATION AIR-HANDLING UNITS. 2.2 CENTRIFUGAL FANS A. Standards and Performance Criteria: Refer to Paragraph, QUALITY ASSURANCE. Record factory vibration test results on the

22、 fan or furnish to the Contractor. SPEC WRITER NOTE: Coordinate Fan arrangement with the equipment schedule on drawings. B. Fan arrangement, unless noted or approved otherwise: l. DWDl fans: Arrangement 3. 2. SWSl fans: Arrangement l, 3, 9 or l0, / except for fume hood (H7 or Hl3) exhaust fans Arran

23、gement 3 shall not be acceptable. / C. Construction: Wheel diameters and outlet areas shall be in accordance with AMCA standards. l. Housing: Low carbon steel, arc welded throughout, braced and supported by structural channel or angle iron to prevent vibration or pulsation, flanged outlet, inlet ful

24、ly streamlined. Provide lifting clips, and casing drain. Provide manufacturers standard access door. Provide 12.5 mm (1/2 inches) wire mesh screens for fan inlets without duct connections. 2. Wheel: Steel plate with die formed blades welded or riveted in place, factory balanced statically and dynami

25、cally. 3. Shaft: Designed to operate at no more than 70 percent of the first critical speed at the top of the speed range of the fans class. 4. Bearings: Heavy duty ball or roller type sized to produce a Bl0 life of not less than 50,000 hours, and an average fatigue life of 200,000 hours. Extend fil

26、led lubrication tubes for interior bearings or ducted units to outside of housing. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-11-09 23 34 00 - 5 5. Belts: Oil resistant, non-sparking and non-static. 6. Belt Drives: Factory installed with final a

27、lignment belt adjustment made after installation. 7. Motors and Fan Wheel Pulleys: Adjustable pitch for use with motors through 15HP, fixed pitch for use with motors larger than 15HP. Select pulleys so that pitch adjustment is at the middle of the adjustment range at fan design conditions. 8. Motor,

28、 adjustable motor base, drive and guard: Furnish from factory with fan. Refer to Section 23 05 11, COMMON WORK RESULTS FOR HVAC AND STEAM GENERATION for specifications. Provide protective sheet metal enclosure for fans located outdoors. 9. Furnish variable speed fan motor controllers where shown on

29、the drawings. Refer to Section, MOTOR STARTERS. Refer to Section 23 05 11, COMMON WORK RESULTS FOR HVAC AND STEAM GENERATION for controller/motor combination requirements. D. In-line Centrifugal Fans: In addition to the requirements of paragraphs A and 2.2.C3 thru 2.2.C9, provide minimum 18 Gauge ga

30、lvanized steel housing with inlet and outlet flanges, backward inclined aluminum centrifugal fan wheel, bolted access door and supports as required. Motors shall be factory pre-wired to an external junction box. /Provide factory wired disconnect switch./ E. Tubular Centrifugal Fans: In addition to t

31、he requirements of paragraphs A and 2.2.C2 thru 2.2.C9 provide; 1. Housings: Hot rolled steel, one-piece design, incorporating integral guide vanes, motor mounts, bolted access hatch and end flanges. Provide spun inlet bell and screen for unducted inlet and screen for unducted outlet. Provide welded

32、 steel, flanged inlet and outlet cones for ducted connection. Provide mounting legs or suspension brackets as required for support. Guide vanes shall straighten the discharge air pattern to provide linear flow. F. Industrial Fans: Use where scheduled or in lieu of centrifugal fans for low volume hig

33、h static service. Construction specifications paragraphs A and C for centrifugal fans shall apply. Provide material handling flat blade type fan wheel. G. Utility Fans, Vent Sets and Small Capacity Fans: Class l design, arc welded housing, spun intake cone. Applicable construction specification, par

34、agraphs A and C, for centrifugal fans shall apply for wheel diameters 300 mm (l2 inches) and larger. Requirement for AMCA seal is waived for wheel diameters less than 300 mm (l2 inches) and housings may be cast iron. Provided by IHSNot for ResaleNo reproduction or networking permitted without licens

35、e from IHS-,-,-11-09 23 34 00 - 6 SPEC WRITER NOTE: 1. Designate the fans that are required to be explosion proof in the Fan Schedule. 2. Select AMCA A, B or C spark resistant construction as required for application. H. Spark Resistant/Explosion Proof Fans: If flammable gas, vapor or combustible du

36、st is present in concentrations above 20% of the Lower Explosive Limit (LEL), provide AMCA construction option: A, B or C as indicated. Drive set shall be comprised of non-static belts for use in an explosive atmosphere. Motor shall be explosion proof type if located in air stream. SPEC WRITER NOTE:

37、 Coordinate with height of roof curb shown on drawings. 2.3 POWER ROOF VENTILATOR A. Standards and Performance Criteria: Refer to Paragraph, QUALITY ASSURANCE. B. Type: Centrifugal fan, backward inclined blades. Provide down-blast or up-blast type as indicated. C. Construction: Steel or aluminum, co

38、mpletely weatherproof, for curb mounting, exhaust cowl or entire drive assembly readily removable for servicing, aluminum bird screen on discharge, UL approved safety disconnect switch, conduit for wiring, vibration isolators for wheel, motor and drive assembly. Provide self acting back draft damper

39、. /Provide electric motor operated damper where indicated./ D. Motor and Drive: Refer to Section 23 05 11, COMMON WORK RESULTS FOR HVAC AND STEAM GENERATION. Bearings shall be pillow block ball type with a minimum L-50 life of 200,000 hours. Motor shall be located out of air stream. E. Prefabricated

40、 Roof Curb: As specified in paragraph 2.3 of this section. F. Up-blast Type: Top discharge exhauster, motor out of air stream. For kitchen hood exhaust applications, provide grease trough on base and threaded drain. The mounting height of the kitchen up-blast exhaust fan shall be in compliance with

41、NFPA 96. (Provide vented curb extension if required to maintain required clearances.) 2.4 POWER WALL VENTILATOR A. Standards and Performance Criteria: Refer to Paragraph, QUALITY ASSURANCE. B. Type: Centrifugal fan, backward inclined blades. C. Construction: Steel or aluminum, completely weatherproo

42、f, for wall mounting, exhaust cowl or entire drive assembly readily removable for Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-11-09 23 34 00 - 7 servicing, aluminum bird screen on discharge, UL approved safety disconnect switch, conduit for wirin

43、g, vibration isolators for wheel, motor and drive assembly. Provide self acting back draft damper. D. Motor and Drive: Refer to Section 23 05 11, COMMON WORK RESULTS FOR HVAC AND STEAM GENERATION. Bearings shall be pillow block ball type with a minimum L-50 life of 200,000 hours. Motor shall be loca

44、ted out of air stream. 2.5 PACKAGED HOOD MAKE-UP AIR UNITS A. Curb mounted air supply unit complete with centrifugal blower and filters. l. Housing: Galvanized steel with baffled air intake for weather protection and with duct adapter. 2. Blower: Ball bearing utility type with vibration mounts to is

45、olate blower, motor and drive. 3. Prefabricated roof curb: As specified in paragraph 2.3 of this section. 4. Filters: Provide four 2” MERV 8 disposable filters B. Provide easy access to motor and drive. SPEC WRITER NOTE: Provide heating coil where tempered make-up air is required. C. Provide /hot wa

46、ter/steam/electric/ heating coil where scheduled. Refer to specification Section 23 82 16, AIR COILS. 2.6 CENTRIFUGAL CEILING FANS (SMALL CABINET FAN) A. Standards and Performance Criteria: Refer to Paragraph, QUALITY ASSURANCE. B. Steel housing, baked enamel finish, direct connected fan assembly, a

47、ttached grille. Provide gravity back draft assembly, aluminum wall cap and bird or insect screen. /Provide electric motor operated damper where indicated./ C. Acoustical Lining: 12.5 mm (1/2 inch) thick mineral fiber, dark finish. Comply with UL 181 for erosion. D. Motor: Shaded pole or permanent sp

48、lit capacitor, sleeve bearings, supported by steel brackets in combination with rubber isolators. E. Ceiling Grille, (Where indicated): White plastic egg crate design, 80 percent free area. F. Control: Provide solid state speed control (located at unit) for final air balancing. 2.7 PROPELLER FANS A.

49、 Standards and Performance Criteria: Refer to Paragraph, QUALITY ASSURANCE. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-11-09 23 34 00 - 8 B. Belt-driven or direct-driven fans as indicated on drawings. C. Square steel panel, deep drawn venturi, arc welded to support arms and fan/motor support brackets, baked enamel finish.