Section 23 73 00INDOOR CENTRALSTATION AIRHANDLING UNITS.docx

1、Section 23 73 00 INDOOR CENTRALSTATION AIRHANDLING UNITSSECTION 23 73 00INDOOR CENTRAL-STATION AIR-HANDLING UNITSSPEC 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. References to

2、pressure in this section are gage pressure unless otherwise noted.PART 1 GENERAL1.1 DESCRIPTIONA. Air handling units including integral components specified herein.B. Definitions: Air Handling Unit (AHU): A factory fabricated and tested assembly of modular sections consisting of / housed-centrifugal

3、 fan with V-belt drive / /single or multiple plenum fans with direct-drive /, coils, filters, and other necessary equipment to perform one or more of the following functions of circulating, cleaning, heating, cooling, humidifying, dehumidifying, and mixing of air. Design capacities of units shall be

4、 as scheduled on the drawings.1.2 RELATED WORK/A. Seismic restraints for equipment: Section 13 05 41, SEISMIC RESTRAINT REQUIREMENTS FOR NON-STRUCTURAL COMPONENTS. /B. General mechanical requirements and items, which are common to more than one section of Division 23: Section 23 05 11, COMMON WORK R

5、ESULTS FOR HVAC AND STEAM GENERATION. C. Sound and vibration requirements: Section 23 05 41, NOISE AND VIBRATION CONTROL FOR HVAC PIPING AND EQUIPMENT.D. Piping and duct insulation: Section 23 07 11, HVAC, PLUMBING, AND BOILER PLANT INSULATION. E. Piping and valves: Section 23 21 13 / 23 22 13, HYDR

6、ONIC PIPING / STEAM AND CONDENSATE HEATING PIPING.F. Heating and cooling coils and pressure requirements: Section 23 82 16, AIR COILS. G. Return and exhaust fans: Section 23 34 00, HVAC FANS. H. Requirements for flexible duct connectors, sound attenuators and sound absorbing duct lining, and air lea

7、kage: Section 23 31 00, HVAC DUCTS and CASINGS.I. Air filters and filters efficiency: Section 23 40 00, HVAC AIR CLEANING DEVICES. J. HVAC controls: Section 23 09 23, DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC.K. Testing, adjusting and balancing of air and water flows: Section 23 05 93, TESTING, ADJUSTI

8、NG, AND BALANCING FOR HVAC.L. Types of motors: Section 23 05 12, GENERAL MOTOR REQUIREMENTS FOR HVAC AND STEAM GENERATION EQUIPMENT. M. Types of motor starters: Section 26 29 11, LOW-VOLTAGE MOTOR STARTERS.N. General Commissioning: Section 01 91 00, GENERAL COMMISSIONING REQUIREMENTS O. HVAC Commiss

9、ioning: Section 23 08 00, COMMISSIONING OF HVAC SYSTEMS 1.3 QUALITY ASSURANCEA. Refer to Article, Quality Assurance, in Section 23 05 11, COMMON WORK RESULTS FOR HVAC AND STEAM GENERATION.B. Air Handling Units Certification1. Air Handling Units with Housed Centrifugal Fans: The air handling units sh

10、all be certified in accordance with AHRI 430 and tested/rated in accordance with AHRI 260. 2. Air Handling Units with Plenum Fans:a. Air Handling Units with a single Plenum Fan shall be certified in accordance with AHRI 430 and tested/rated in accordance with AHRI 260. b. Air handling Units with Mul

11、tiple Fans in an Array shall be tested and rated in accordance with AHRI 430 and AHRI 260. C. Heating, Cooling, and Air Handling Capacity and Performance Standards: AHRI 430, AHRI 410, ASHRAE 51, and AMCA 210. D. Performance Criteria:1. The fan BHP shall include all system effects for all fans and v

12、-belt drive losses for housed centrifugal fans.2. The fan motor shall be selected within the rated nameplate capacity, without relying upon NEMA Standard Service Factor.3. Select the fan operating point as follows:a. Forward Curve and Axial Flow Fans: Right hand side of peak pressure point.b. Air Fo

13、il, Backward Inclined, or Tubular Fans Including Plenum Fans: At or near the peak static efficiency but at an appropriate distance from the stall line. 4. Operating Limits: AMCA 99 and Manufacturers Recommendations. E. Units shall be factory-fabricated, assembled, and tested by a manufacturer, in bu

14、siness of manufacturing similar air-handling units for at least five (5) years. SPEC WRITERS NOTES: For larger projects involving more than five air handling units, the A/E shall select a few typical AHUs, in different configurations, for an initial submission. The suggested different configurations

15、 are:1. 100 percent outside air AHUs with or without heat recovery coils.2. Re-circulating type of variable air volume AHUs with minimum outside air and economizer cycle features. The remaining submission shall be received only after the initial submission is approved with satisfactory resolution of

16、 all comments made during the review and approval process. 1.4. SUBMITTALS: A. The contractor shall, in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES, furnish a complete submission for all air handling units covered in the project. The submission shall include all inform

17、ation listed below. Partial and incomplete submissions shall be rejected without reviews.B. Manufacturers Literature and Data:1. Submittals for AHUs shall include fans, drives, motors, coils, / humidifiers, / sound attenuators /, mixing box with outside/return air dampers, filter housings, / blender

18、 sections /, and all other related accessories. The contractor shall provide custom drawings showing total air handling unit assembly including dimensions, operating weight, access sections, / diffusion plates /, flexible connections, door swings, controls penetrations, electrical disconnect, lights

19、, duplex receptacles, switches, wiring, utility connection points, unit support system, vibration isolators, drain pan, pressure drops through each component (filter, coil etc).2. Submittal drawings of section or component only will not be acceptable. Contractor shall also submit performance data in

20、cluding performance test results, charts, curves or certified computer selection data; data sheets; fabrication and insulation details. If the unit cannot be shipped in one piece, the contractor shall indicate the number of pieces that each unit will have to be broken into to meet shipping and job s

21、ite rigging requirements. This data shall be submitted in hard copies and in electronic version compatible to AutoCAD version used by the VA at the time of submission.3. Submit sound power levels in each octave band for the inlet and discharge of the fan and at entrance and discharge of AHUs at sche

22、duled conditions. In absence of sound power ratings refer to Section 23 05 41, NOISE AND VIBRATION CONTROL FOR HVAC PIPING AND EQUIPMENT. 4. Provide fan curves showing Liters/Second (cubic feet per minute), static pressure, efficiency, and horsepower for design point of operation and at maximum desi

23、gn Liters/Second (cubic feet per minute).5. Submit total fan static pressure, external static pressure, for AHU including total, inlet and discharge pressures, and itemized specified internal losses and unspecified internal losses. Refer to air handling unit schedule on drawings.C. Maintenance and o

24、perating manuals in accordance with Section 01 00 00, GENERAL REQUIREMENTS. Include instructions for lubrication, filter replacement, motor and drive replacement, spare part lists, and wiring diagrams.D. Submit written test procedures two weeks prior to factory testing. Submit written results of fac

25、tory tests for approval prior to shipping.E. Submit shipping information that clearly indicates how the units will be shipped in compliance with the descriptions below.1. Units shall be shipped in one (1) piece where possible and in shrink wrapping to protect the unit from dirt, moisture and/or road

26、 salt.2. If not shipped in one (1) piece, provide manufacturer approved shipping splits where required for installation or to meet shipping and/or job site rigging requirements in modular sections. Indicate clearly that the shipping splits shown in the submittals have been verified to accommodate th

27、e construction constraints for rigging as required to complete installation and removal of any section for replacement through available access without adversely affecting other sections.3. If shipping splits are provided, each component shall be individually shrink wrapped to protect the unit and a

28、ll necessary hardware (e.g. bolts, gaskets etc.) will be included to assemble unit on site (see section 2.1.A4).4. Lifting lugs will be provided to facilitate rigging on shipping splits and joining of segments. If the unit cannot be shipped in one piece, the contractor shall indicate the number of p

29、ieces that each unit will have to be broken into to meet shipping and job site rigging requirements.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. Ai

30、rConditioning, Heating, and Refrigeration Institute (AHRI)/(ARI):41001 Standard for Forced-Circulation Air-Heating and Air-Cooling Coils43009 Central Station Air Handling UnitsC. Air Movement and Control Association International, Inc. (AMCA):21007 Laboratory Methods of Testing Fans for RatingD. Ame

31、rican Society of Heating, Refrigerating and Air-conditioning Engineers, Inc. (ASHRAE):170-2008 Ventilation of Health Care FacilitiesE. American Society for Testing and Materials (ASTM):ASTM B117-07a Standard Practice for Operating Salt Spray (Fog) ApparatusASTM D165408 Standard Test Method for Evalu

32、ation of Painted or Coated Specimens Subjected to Corrosive EnvironmentsASTM D173508 Standard Practice for Testing Water Resistance of Coatings Using Water Fog ApparatusASTM D335908 Standard Test Methods for Measuring Adhesion by Tape TestF. Military Specifications (Mil. Spec.):MIL-P-21035B-2003 Paint, High Zinc Dust Content, Galvanizing Repair (Metric)G. National Fire Protection Association (NFPA):NFPA 90A Standard for Installation of Air Conditioning and Ventilating Systems, 2009H. Energy Policy Act of 2005 (P.L.109-