VA 23 84 00-2011 HUMIDITY CONTROL EQUIPMENT.pdf

1、05-11 23 84 00 - 1 SECTION 23 84 00 HUMIDITY CONTROL EQUIPMENT SPEC WRITER NOTE: 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 This section specifies /desiccant /deh

2、umidifier units for /preconditioning of existing or new air conditioning systems/and/stand-alone units use for dehumidifying air/ and/ packaged mechanical dehumidification units for /therapeutic/ pools/. 1.2 RELATED WORK A. Section 01 00 00, GENERAL REQUIREMENTS: Requirements for pre-test of equipme

3、nt. 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 one section of Division 23. D. Section

4、 23 23 00, REFRIGERANT PIPING: Requirements for field refrigerant piping. E. Section 23 21 13, HYDRONIC PIPING: Requirements for field hot water piping. F. Section 23 22 13, STEAM AND CONDENSATE HEATING PIPING: Requirements for field steam and condensate piping. G. Section 23 82 16, AIR COILS: Requi

5、rements for run-around system coils. H. Section 23 31 00, HVAC DUCTS AND CASINGS: Requirements for sheet metal ducts and fittings. I. Section 23 40 00, HVAC AIR CLEANING DEVICES: Requirements for filters including efficiency. J. Section 23 09 23, DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC: Requirements

6、for controls and instrumentation. K. Section 23 05 93, TESTING, ADJUSTING, AND BALANCING FOR HVAC: Requirements for testing, adjusting and balancing of HVAC system. L. Section 23 05 12, GENERAL MOTOR REQUIREMENTS FOR HVAC AND STEAM GENERATION EQUIPMENT: Requirements for HVAC motors. Provided by IHSN

7、ot for ResaleNo reproduction or networking permitted without license from IHS-,-,-05-11 23 84 00 - 2 M. Section 26 29 11, LOW-VOLTAGE MOTOR STARTERS: Requirements for motor starters. N. Section 23 08 00 COMMISSIONING OF HVAC SYSTEMS: Requirements for commissioning, systems readiness checklists, and

8、training. 0. 01 91 00, GENERAL COMMISSIONING REQUIREMENTS 1.3 QUALITY ASSURANCE A. Refer to the GENERAL CONDITIONS. B. Refer to specification Section 01 00 00, GENERAL REQUIREMENTS for performance tests and instructions to VA personnel. C. Refer to paragraph, QUALITY ASSURANCE, in specification Sect

9、ion 23 05 11, COMMON WORK RESULTS FOR HVAC. D. Unit(s) shall be provided by a manufacturer who has been manufacturing desiccant dehumidifiers and have been in satisfactory service for at least three (3) years. 1.4 SUBMITTALS A. Submit in accordance with specification Section 01 33 23, SHOP DRAWINGS,

10、 PRODUCT DATA, and SAMPLES. B. Manufacturers Literature and Data: 1. Technical data on design operating inlet and outlet conditions, air flows with diagram showing air volumes and conditions throughout the system, dehumidification capacity, filtration and fan motor and electrical power data. 2. A ge

11、neral arrangement diagram with overall dimensions showing all major components with overall dimensions, utility and duct work connections, bolting arrangement, operating weight and required service and equipment removal clearances. 3. Control diagrams for / preconditioning of existing and / or new a

12、ir conditioning system / stand alone use for dehumidifying air, / electric circuits interface all control set points. C. Shop drawings shall indicate assembly, unit dimensions, weight loading, required clearances, construction details, and field connection details. D. Submit fan curves with specifie

13、d operating point clearly plotted and sound power levels for both fan outlet and casing radiation at rated capacity. E. Submit unit control system documentation required for interface with BACnet protocol DDC control system. Submit BACnet compliant Protocol Implementation Conformance Statement (PICS

14、) for all controllers. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-05-11 23 84 00 - 3 F. Submit electrical requirements for power supply wiring including wiring diagrams for interlock and control wiring, clearly indicating factory-installed and f

15、ield-installed wiring. G. Certificate: Evidence of satisfactory performance on three similar installations. H. Provide installation, operating and maintenance instructions, in accordance with Article, INSTRUCTIONS, in specification Section 01 00 00, GENERAL REQUIREMENTS. I. Performance test report:

16、In accordance with PART 3. J. 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 COMMISSIONING OF HVAC SYSTEMS. 1.5 AP

17、PLICABLE 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. Air-conditioning, Heating and Refrigeration Institute (AHRI) 410-01 . ForcedCirculation Air-Cooling and Air

18、-Heating Coils C. Air Movement and Control Association (AMCA): 99-10 Standards Handbook 210-07 . Laboratory Methods of Testing Fans for Aerodynamic Performance Rating (ANSI) 301-06 . Laboratory Methods of Testing Fans for Aerodynamic Performance Rating (ANSI) D. American Society of Heating, Refriger

19、ating and Air-Conditioning Engineers (ASHRAE) 52.2-07 METHOD OF TESTING General Ventilation Air Cleaning Devices for Removal Efficiency by Particle Size (ANSI) 62.1-10 Ventilation for Acceptable Indoor Air Quality (ANSI) E. American Bearing Manufacturers Association (ABMA) 9-1990 (R2008) . Load Rati

20、ngs and Fatigue Life for Ball Bearings (ANSI) F. National Fire Protection Association (NFPA) 90A-09 . Standard for the Installation of Air-Conditioning and Ventilating Systems 70-0511 National Electrical Code Provided by IHSNot for ResaleNo reproduction or networking permitted without license from I

21、HS-,-,-05-11 23 84 00 - 4 1.6 QUALITY ASSURANCE A. Fan Performance Ratings: Conform to AMCA 210 and bear the AMCA Certified Rating Seal. B. Sound Ratings: AMCA 301; tested to AMCA 300 and bear AMCA Certified Sound Rating Seal. C. Fabrication: Conform to AMCA 99. D. Air Coils: Certify capacities, pre

22、ssure drops, and selection procedures in accordance with AHRI 410. E. Product of manufacturer regularly engaged in production of pool dehumidification equipment who issues complete catalog data on total product. 1.7 DELIVERY, STORAGE, AND HANDLING A. Accept products on site in factory-fabricated pro

23、tective containers, with factory-installed shipping skids and lifting lugs. Inspect for damage. B. Store in clean dry place and protect from weather and construction traffic. Handle carefully to avoid damage to components, enclosures and finish. C. Comply with manufacturers rigging and installation

24、instructions. 1.8 PROJECT CONDITIONS Do not operate units for any purpose, temporary or permanent, until ductwork is clean, filters are in place, bearings lubricated, fan has been test run, all piping is connected and energized and all wiring complete and tested. 1.9 ADDITIONAL REQUIREMENTS A. Provi

25、de one additional set of fan belts and disposable panel filters for each unit. SPEC WRITER NOTE: Provide corrosion protection for all coils (located in the air-handling unit) and the casing surfaces, exterior and interior, exposed to ambient air in high-humidity locations (VA HVAC Design Manual Chap

26、ter 7) and as determined by the designer for a specific location. Coating should not be used or the chemically corrosive locations where the pH values are not within 3 to 12. B. CORROSION PROTECTION For air-handling unit mounted coils provide the following corrosion treatment: Provided by IHSNot for

27、 ResaleNo reproduction or networking permitted without license from IHS-,-,-05-11 23 84 00 - 5 1. Epoxy Immersion Coating Electrically Deposited: The multi-stage corrosion-resistant coating application comprises of cleaning (heated alkaline immersion bath) and reverse-osmosis immersion rinse prior t

28、o the start of the coating process. The coating thickness shall be maintained between 0.6-mil and 1.2-mil. Before the coils 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 c

29、omprising of UV-resistant urethane mastic topcoat shall be applied. Provide complete coating process traceability for each coil and minimum five years of limited warranty. 2. The coating process shall such that uniform coating thickness is maintained at the fin edges. The quality control shall be ma

30、intained by ensuring compliance to the applicable ASTM Standards for the following: a. Salt Spray Resistance (Minimum 6,000 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/P

31、ound)3. 3. Casing Surfaces (Exterior and Interior): All exposed and accessible exterior and interior metal surfaces shall 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 p

32、rovide minimum salt-spray resistance of 1,000 hours (ASTM B117) and 500 hours UV resistance (ASTM D4587). PART 2 PRODUCTS 2.1 DEHUMIDIFIER UNITS A. General: Units shall be complete, factory assembled, and tested; and of sizes, arrangements, capacities, and performance as scheduled and as specified i

33、n the schedules shown in the drawings/; and for / indoor / outdoor / installation / preconditioning of / existing / and / new air conditioning system / stand alone use for dehumidifying air/. SPEC WRITER NOTES: 1. Add chilled water section for situations when applications where post cooling is requi

34、red. 2. The components included in the following paragraphs represent the wide range of components Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-05-11 23 84 00 - 6 available to apply dehumidification systems to buildings. The designer must edit the

35、 following to include the components applicable to the project design requirements. 1. Dehumidification shall be accomplished by use of a desiccant to absorb water vapor and maintain humidity control level independent of load variations within design limit/ and without use of refrigerants, compresso

36、rs,/ or chilled water/. 2. Unit(s) shall be capable and designed for year-round, 24-hours-a-day operation; and requiring only connections of ducts, utilities, and remote sensors, controllers, and monitors. 3. Unit(s) shall include active regeneration system for control of dehumidification processes.

37、 B. Casing: 1. Double-wall construction / with corrosion-protective / /removable panels/hinged access doors/ with neoprene gaskets, minimum 50-mm (2-inch) / thick thermal insulation fill, stainless steel fasteners, knockouts for electrical and piping connections through the /side of the unit/bottom

38、of the unit without the roof curb/, condensate drain connection, and lifting lugs. 2. The unit housing the internal partitions shall be constructed of minimum 18 gage galvanized steel or aluminum pre-insulated double wall panels with a minimum of 50-mm (2-inch) thermal insulation. The base shall be

39、all welded, structural steel or formed 14-gage, galvanized steel. Units shall have cross supports for each major component and base channels and lifting eyes to facilitate rigging. The units shall be of water and air tight construction over all with interior air tight construction between various se

40、ctions of the units. Adjoining panels shall be sealed with a silicon compound or heavy duty compression type gaskets. Leakage rate shall not exceed 2 percent at a pressure of 746 Pa (3.0 inches water gage). 3. All non-pre-insulated exterior panels shall be insulated with minimum 25-mm (1-inch) vinyl

41、- or foil-faced fiberglass insulation without exposed edges, and secured by permanent mechanical fasteners. 4. All exterior panels shall be / embossed aluminum cabinet panels / constructed with corrosion-protective coating on the manufacturers standard coating. Provided by IHSNot for ResaleNo reprod

42、uction or networking permitted without license from IHS-,-,-05-11 23 84 00 - 7 5. All internal air-processing and air-treatment components shall be removable through removable access panels without dismantling plenums or ductwork. 6. Access panels shall be provided with resilient gaskets and quick-r

43、elease hardware. 7. Access doors for filters and control adjustment shall have corrosion-resistant, continuous hinge or heavy-duty, multiple hinges. 8. Surfaces in contact with the airstream shall comply with requirements in ASHRAE 62.1-2007. C. Dehumidifier: 1. The dehumidifier shall include a desi

44、ccant wheel utilizing a fractional horsepower electric motor and a variable speed drive and reactivation air flow indicating devices/ steam / hot water / electric / direct gas fired / indirect gas fired / reactivation heater / reactivation fan/motor assembly, reactivation energy modulation system, e

45、lectric/mechanical rotation fault circuitry and necessary manual and automatic dampers for proper functioning of the unit under all operating conditions. 2. Dehumidifier shall rotary type, designed for continuous operation, and arranged to provide a counter flow of process and reactivation air strea

46、ms with full-face pressure seals or low-friction contact seals on both sides to prevent cross leakage for external static pressure of up to 622 Pa (2.5 inches w.g.) 3. Desiccant rotor shall have synthesized silica gel, enhanced with titanium, bonded to a ceramic matrix, with filled voids and encapsu

47、lating the ceramic. Driver shall be a motor with adjustable drive sheaves and belt-tensioning idler pulley or adjustable motor mount. 4. The rotary desiccant shall transfer water in the vapor phase. The design and geometry shall provide for laminar flow over the operating range for minimum pressure

48、loss with maximum transfer surface and minimum power requirements. The desiccant shall be a permanent integral part of the structure. D. Heat Exchanger: 1. The heat exchanger shall be constructed of non-hygroscopic material with corrosion protection, described above for the coils and surfaces therma

49、l wheel to prevent the transfer of water vapor or an air-to-air heat pipe with copper tubes and Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-05-11 23 84 00 - 8 aluminum fins, fabricated with capillary wick structure charged with ozone friendly refrigerant to be used in the pro