VA 22 33 00-2010 ELECTRIC DOMESTIC WATER HEATERS.pdf

1、02-10 22 33 00 - 1 SECTION 22 33 00 ELECTRIC DOMESTIC WATER HEATERS 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 describes the requi

2、rements for installing a complete electric domestic water heater system ready for operation including the water heaters, thermometers, and all necessary accessories, connections, and equipment. 1.2 RELATED WORK: A. Section 09 91 00, PAINTING: Preparation and finish painting. B. Section 22 05 11, COM

3、MON WORK RESULTS FOR PLUMBING. C. Section 22 11 23, DOMESTIC WATER PUMPS: Circulating Pumps. D. Section 23 07 11, HVAC, PLUMBING, AND BOILER PLANT INSULATION: Heater Insulation. E. Section 22 05 19, METERS AND GAGES FOR PLUMBING PIPING, 22 05 23, GENERAL-DUTY VALVES FOR PLUMBING PIPING, and 22 11 00

4、, FACILITY WATER DISTRIBUTION: Piping, Fittings, Valves and Gages. F. Section 13 05 41, SEISMIC RESTRAINT REQUIREMENTS FOR NON-STRUCTURAL COMPONENTS: Seismic restraint for Equipment. 1.3 QUALITY ASSURANCE: A. Comply with American Society of Heating, Refrigerating and Air- Conditioning Engineers (ASH

5、RAE) for efficiency performance: 1. ASHRAE 90.1, Energy Efficient Design of New Buildings except Low-Rise Residential Buildings, ”for commercial water heaters.” B. Electrical components, devices and accessories shall be listed and labeled B as defined in NFPA 70 by a qualified testing agency, and ma

6、rked for intended location and application. C. ASME code construction shall be a vessel fabricated in compliance with the ASME boiler and Pressure Vessel Code: Section VIII, Division 1. D. Fabricate and label equipment components that will be in contract with potable water to comply with NSF 61, “Dr

7、inking Water System Components Health Effects” Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-10 22 33 00 - 2 E. The electric domestic water heater shall conform to Section 13 05 41 on Seismic restraint requirements, withstanding Seismic movement

8、 without separation of any parts from the equipment when subjected to a Seismic event. 1.4 SUBMITTALS: A. Submit manufacturers literature and data pertaining to the water heater in properly bound package, in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES. Include the foll

9、owing as a minimum: 1. Water Heaters. 2. Pressure and Temperature Relief Valves. 4. Thermometers. 5. Pressure Gages. 6. Vacuum Breakers. B. For each electric domestic hot water heater type and size, the following characteristics shall be submitted: 1. Rated Capacities. 2. Operating characteristics.

10、3. Electrical characteristics. 4. Furnished specialties and accessories. 5. A form U-1 or other documentation stating compliance with the ASME Boiler and Pressure Vessel code. C. Shop drawings shall include wiring diagrams for power, signal and control functions. D. Seismic qualification certificate

11、s shall be submitted that details equipment anchorage components, identifies equipment center of gravity with mounting and anchorage provisions, and whether the seismic qualification certificate is based on an actual test or calculations. E. The domestic water heater shall be certified and labeled b

12、y a testing agency. 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. American Society of Sanitary Engineering (ASSE): 1005 . Performance Requirements

13、 for Water Heater Drain Valves, 20 mm (3/4 inch) size C. American National Standard Institute (ANSI): Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-10 22 33 00 - 3 Z21.22B-2001 . Relief Valves for Hot Water Supply Systems D. American Society of

14、Mechanical Engineers (ASME): B1.20.1-83(R 2006) . Pipe Threads, General Purpose (Inch) B16.5-03 . Standard for Pipe Flanges and Flanged Fittings: NPS through NPS 24 B16.24-06 Cast Copper Alloy Pipe Flanges and Flanged Fittings: Classes 150, 300, 400, 600, 900, 1500, and 2500. PTC 25.3-02 Pressure Re

15、lief Devices Section IV-07 Boiler and Pressure Vessel Code; Section IV, Recommended Rules for the Care and Operation of Heating Boilers Section VIII D1-07 . Boiler and Pressure Vessel Code, Section VIII, Pressure Vessels Division 1 Basic Coverage E. National Fire Protection Association (NFPA) 70-06

16、National Electrical Code F. Underwriters Laboratories, Inc. (UL): 174-04 . Household Electric Storage Tank Water Heaters 1453-04 Water Heaters, Electric Booster and Commercial Storage Tank 499-05 . Standard for Safety Electric Heating Appliances SPEC WRITER NOTE: Delete between /_/ if not applicable

17、 to project. Also delete any other item or paragraph not applicable in the section and renumber the paragraphs. 1.6 AS-BUILT DOCUMENTATION A. The electronic documentation and copies of the Operations and Maintenance Manual, approved submittals, shop drawings, and other closeout documentation shall b

18、e prepared by a computer software program complying with Section 508 of the Rehabilitation Act of 1973, as amended (29 U.S.C 794d). The manufacturer or vendor of the software used to prepare the electronic documentation shall have a Voluntary Product Accessibility Template made available for review

19、and included as part of the Operations and Maintenance Manual or closeout documentation. All available accessibility functions listed in the Voluntary Accessibility Template shall be enabled in the prepared electronic files. As Adobe Acrobat is a common industry format for such documentation, follow

20、ing the document, “Creating Accessible Adobe Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-10 22 33 00 - 4 PDF files, A Guide for Document Authors“ that is maintained and made available by Adobe free of charge is recommended.” B. Four sets of ma

21、nufacturers literature and data updated to include submittal review comments and any equipment substitutions. C. Four sets of operation and maintenance data updated to include submittal review comments shall be inserted into a three ring binder. All aspects of system operation and maintenance proced

22、ures, including piping isometrics, wiring diagrams of all circuits, a written description of system design, control logic, and sequence of operation shall be included in the operation and maintenance manual. The operations and maintenance manual shall include troubleshooting techniques and procedure

23、s for emergency situations. Notes on all special systems or devices such as damper and door closure interlocks shall be included. A List of recommended spare parts (manufacturer, model number, and quantity) shall be furnished. Information explaining any special knowledge or tools the owner will be r

24、equired to employ shall be inserted into the As-Built documentation. PART 2 - PRODUCTS SPEC WRITER NOTE: Coordinate and assure that the electrical characteristics specified below are clearly shown on appropriate drawings. 2.1 ELECTRIC DOMESTIC WATER HEATERS: A. The tank construction shall be steel s

25、hell, with a inner tank liner complying with NSF 61 for barrier materials for potable water. The inner liner shall be extended into the tappings. The vessel shall be ASME Boiler and Pressure Vessel Code (BPVC), section VIII, fabricated with a pressure rating of 1035 kPa (150 psig) B. Tapping (openin

26、gs) shall be Factory fabricated of materials compatible with the tank and in accordance with appropriate ASME standards B1.20.1 for piping connections, pressure and temperature relief valve, pressure gauge, thermometer, drain valve, anode rods and controls as required. Tappings shall comply with the

27、 following: 1. 50 mm or DN50 (2 inch) and smaller: Threaded ends according to ASME B1.20.1. 2. 65 mm or DN65 (2 1/2-inch) and Larger: Flanged ends according to ASME B16.5 for steel and stainless steel flanges, and according to ASME B 16.24. C. Tank insulation shall comply with ASHRAE 90.1. Provided

28、by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-10 22 33 00 - 5 D. For domestic hot water heater sizes greater than 9 KW, the heating element shall be arranged in multiples of three elements. For heaters less than 9 KW, the heater elements shall be arrange

29、d in /single/double/ elements. E. The domestic hot water heaters shall have screw in or bolt in immersion type, thermostatically adjustable. Set thermostat for maximum water temperature of 55C (130F). The electrical characteristics are scheduled on the drawings. F. Combination Pressure and Temperatu

30、re Relief Valves shall be ASME rated and stamped for combination temperature and pressure relief valves. One or more relief valves with total relieving capacity at least as great as the heat input shall be included. The pressure setting shall be less than the domestic water heater working pressure r

31、ating. G. the anode rod shall be replaceable magnesium. H. the drain valve shall be corrosion resistant metal complying with ASSE 1005. 2.2 ELECTRIC, TANKLESS, DOMESTIC WATER HEATER A. Electric, Tankless, domestic water heaters shall be constructed with copper piping or tubing complying with NSF 61

32、barrier materials for potable water without storage capacity. B. The pressure rating shall be 1035 kPa (150 psig). C. The heating element shall be resistance heating system type. D. Temperature control shall be made with /flow control fittings/ /thermostat/. E. The safety control shall be a high tem

33、perature limit cutoff device or system. F. The heater shall have a bracket for wall mounting and have an aluminum or steel with enameled jacket. 2.3 DOMESTIC HOT WATER COMPRESSION TANKS A. A steel pressure rated tank constructed with welded joints and factory installed butyl rubber diaphragm shall b

34、e installed as scheduled. The air pre charge shall be set to minimum system operating pressure at tank. B. The tappings shall be factory fabricated steel, welded to the tank and include ASME B1.20.1 pipe thread. C. The interior finish shall comply with NSF 61 barrier materials for potable water tank

35、 linings and the liner shall extend into and through the tank fittings and outlets. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-10 22 33 00 - 6 D. The air charging valve shall be factory installed. 2.4 ELEVATED ELECTRIC WATER HEATER DRAIN PAN

36、A. A stainless steel drain pan shall be provided that is large enough to contain the volume of the heater. The drain pan shall include a drain outlet not less than 20 millimeter or DN 20 (NPS ”) with ASME B1.20.7 garden hose threads. 2.5 HEAT TRAPS A. Heat traps shall be installed in accordance with

37、 ASHRAE 90.1, latest edition. 2.6 COMBINATION TEMPERATURE AND PRESSURE RELIEF VALVES A. The combination temperature and pressure relief valves shall be ASME rated and stamped and include a relieving capacity at least as great as the heat input and include a pressure setting less than the water heate

38、rs working pressure rating. 2.7 THERMOMETERS: The thermometers shall be straight stem, iron case, red reflecting mercury thermometer or red liquid-filled thermometers, approximately 175 mm (7 inches) high, 4 to 115C (40 to 240F). PART 3 - EXECUTION 3.1 INSTALLATION: A. Water heaters shall be install

39、ed on concrete bases unless elevated above the floor. Refer to Specification Section 03 30 00, CAST-IN-PLACE CONCRETE and Section 22 05 11, COMMON WORK RESULTS FOR PLUMBING B. The water heaters shall be installed level and plumb and securely anchored. C. The water heaters shall be installed and conn

40、ected in accordance with manufacturers written instructions. D. All pressure and temperature relief valves discharge shall be piped to nearby floor drains. E. Thermometers shall be installed on the water heater inlet and outlet piping. F. The thermostatic control shall be set for a maximum setting o

41、f 54 degrees C (130 degrees F). G. Shutoff valves shall be installed on the domestic water supply piping to the water heater and on the domestic hot water outlet piping. H. All manufacturerss required clearances shall be maintained. /I. The electric domestic water heaters shall be installed with sei

42、smic restraint devices./ Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-10 22 33 00 - 7 J. A combination temperature and pressure relief valve shall be installed at the top portion of the storage tank. The sensing element shall extend into the ta

43、nk. The relief valve outlet drain piping shall discharge by positive air gap into a floor drain. K. Piping type heat traps shall be installed on the inlet and outlet piping of the electric domestic hot water heater storage tanks. L. Water heater drain piping shall be installed as indirect waste to s

44、pill by positive air gap into open drains or over floor drains. Hose end drain valves shall be installed at low points in water piping for electric domestic hot water heaters without integral drains. 3.2 LEAKAGE TEST: Before piping connections are made, water heaters shall be tested with hydrostatic

45、 pressure of 1375 kPa (200 psi) and 1654 kPa (240 psi) for a unit with a MAWP of 1103 kPa (160 psi). Any domestic water heater leaking water shall be replaced with a new unit at no additional cost to the VA. 3.3 PERFORMANCE TEST: All of the remote water outlets shall have a minimum of 49C (120F) and

46、 a maximum of 54C (130F) water flow at all times. If necessary, make all corrections to balance the return water system or reset the thermostat to make the system comply with design requirements. - - - E N D - - - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-