VA 22 34 00-2010 FUEL-FIRED DOMESTIC WATER HEATERS.pdf

1、02-10 22 34 00 - 1 SECTION 22 34 00 FUEL-FIRED 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 DESCRIPTION: This section describes the require

2、ments for installing a complete domestic gas fired hot water heating system ready for operation including 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 Pump. 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 REQUIREMENT FOR NON STRUCTURAL COMPONENTS: Seismic Restraint for Equipment. 1.3 QUALITY ASSURANCE: A. Comply with American Society of Heating, Refrigerating and Air- Conditioning Engineers (ASHRA

5、E) 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 label as defined in NFPA 70 by a qualified testing agency, and marked fo

6、r 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, “Drinking

7、Water System Components Health Effects” E. the gas fired domestic water heater shall conform to Section 13 05 41 on Seismic restraint requirements, withstanding Seismic movement Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-10 22 34 00 - 2 witho

8、ut 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 following

9、as a minimum: 1. Water Heaters. 2. Pressure and Temperature Relief Valves. 4. Thermometers. 5. Pressure Gages. 6. Vacuum Breakers. B. For each natural gas fired 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 certificates

11、 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 by

12、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 34 00 - 3 Z21.10.1-06 Gas Water Heaters Volume 1, Storage Water Heaters with Input Ratings o

14、f 75000 Btu per hour or less. Z21.10.3-04 Gas Water Heaters, Volume III, Storage Water Heaters with Input Ratings above 75000 Btu per hour, circulating and instantaneous. Z21.15A-01 . Manually Operated Gas Valves for Appliances, Appliance connector Valves, and Hose End Valves Z21.18-07 Gas appliance

15、 Pressure Regulators Z21.20-05 Automatic Gas Ignition Systems and Components Z21.21-05 Automatic Valves for Gas Appliance Z21.22B-01 . Relief Valves for Hot Water Supply systems D. American Society of Mechanical Engineers (ASME): B1.20.1-83(R 2006) . Pipe Threads, General Purpose(Inch) B16.5-03 . St

16、andard 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 Relief Devices Section IV-07 Boiler and Pressure Vessel Code; Section IV, Recommended Rules for the C

17、are 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) 54-09 National Fuel Gas Code F. Underwriters Laboratories, Inc. (UL): SPEC WRITER NOTE: Delete between /_

18、/ if not applicable 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 do

19、cumentation shall be 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 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-10 22

20、 34 00 - 4 used to prepare the electronic documentation shall have a Voluntary Product Accessibility Template made available for review and included as part of the Operations and Maintenance Manual or closeout documentation. All available accessibility functions listed in the Voluntary Accessibility

21、 Template shall be enabled in the prepared electronic files. As Adobe Acrobat is a common industry format for such documentation, following the document, “Creating Accessible Adobe PDF files, A Guide for Document Authors“ that is maintained and made available by Adobe free of charge is recommended.”

22、 B. Four sets of manufacturers 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

23、 maintenance procedures, 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 techn

24、iques and procedures 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

25、the owner will be required 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 ATMOSPHERIC GAS FIRED, STORAGE DOMESTIC WATER HEATERS:

26、A. The gas fired domestic water heater shall comply with / ANSI Z21.10.1 / ANSI Z21.10.3 /. B. The water heater design shall provide a combustion efficiency of at least /82/ /84/ /85/ /88/ /95/ percent at operating conditions. C. The tank Construction shall be ASME code Steel, glass lined, with 1035

27、 kPa (160 psig) working pressure rating. D. The tapping (Fittings) shall be factory fabricated of materials compatible with the tank and in accordance with appropriate ASME Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-10 22 34 00 - 5 standards

28、for piping connection, pressure and temperature relief valve, pressure gauge, thermometer, drain valve, anode rods and controls. the tappings shall be: 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

29、ASME B16.5 for steel and stainless steel flanges, and according to ASME B 16.24. E. The natural, gas fired burn shall include the following: 1. Thermostatically adjustable. 2. High temperature limit and low water cutoff devices for safety controls. 3. Automatic ignition in accordance with ANSI Z21.2

30、0. 4. Automatic damper in accordance with ANSI Z21.66. The automatic dampers shall be /electrically operated/ /mechanically activated/ /thermally activated/, automatic vent damper device with size matching draft hood for 300,000 BTUH and below. F. Temperature Setting shall be set for a maximum water

31、 temperature of 55C (130F). The temperature setting shall be adjustable. G. The insulation shall surround the entire storage tank except connection and controls and shall comply with ASHRAE 90.1. H. The jacket shall be steel with enameled finish. I. The drain valve shall be corrosion resistant metal

32、 complying with ASSE 1005. J. The Combination Pressure and Temperature relief Valve shall be ANSI Z21.22 rated and constructed of all brass or bronze with a self-closing reseating valve. 2.2 POWER VENT, GAS FIRED, STORAGE DOMESTIC WATER HEATERS: A. The gas fired domestic water heater shall comply wi

33、th / ANSI Z21.10.1 / ANSI Z21.10.3 /. B. The water heater design shall provide a combustion efficiency of at least /82/ /84/ /85/ /88/ /95/ percent at operating conditions. C. The tank Construction shall be ASME code Steel, glass lined, with 1035 kPa (160 psig) working pressure rating. D. The tappin

34、g (Fittings) shall be factory fabricated of materials compatible with the tank and in accordance with appropriate ASME standards for piping connection, pressure and temperature relief valve, Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-10 22 34

35、 00 - 6 pressure gauge, thermometer, drain valve, anode rods and controls. The tappings shall be: 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, an

36、d according to ASME B 16.24. E. The natural gas-fired burner shall include the following: 1. Thermostatic adjustment. 2. Designed for use with power vent heaters 3. High temperature limit and low water cutoff devices for safety controls. 4. Automatic ignition in accordance with ANSI Z21.20. 5. Autom

37、atic damper in accordance with ANSI Z21.66. The automatic dampers shall be /electrically operated/ /mechanically activated/ /thermally activated/, automatic vent damper device with size matching draft hood for 300,000 BTUH and below. F. Temperature Setting shall be set for a maximum water temperatur

38、e of 55C (130F). G. The insulation shall surround the entire storage tank except connection and controls and shall comply with ASHRAE 90.1. H. The jacket shall be steel with enameled finish. I. The drain valve shall be corrosion resistant metal complying with ASSE 1005. J. The power vent system shal

39、l be interlocked with the burner. K. Combination Pressure and Temperature relief Valve: ANSI Z21.22 rated, constructed of all brass or bronze with a self-closing reseating valve. 2.3 DOMESTIC HOT WATER COMPRESSION TANKS A. A steel pressure rated tank constructed with welded joints and factory instal

40、led butyl rubber diaphragm shall be 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 barrie

41、r materials for potable water tank linings and the liner shall extend into and through the tank fittings and outlets. D. The air charging valve shall be factory installed. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-10 22 34 00 - 7 2.4 HEAT TR

42、APS A. Heat traps shall be installed in accordance with ASHRAE 90.1, latest edition. 2.5 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 a

43、nd include a pressure setting less than the water heaters working pressure rating. 2.6 GAS SHUTOFF VALVES A. The gas shutoff valve shall be manually operated conforming to ANSI Z21.15. B. In high Seismic areas, an earthquake shear valve shall be installed. 2.7 GAS PRESSURE REGULATORS A. The gas pres

44、sure regulator shall be appliance type, pressure rating matching inlet natural gas supply temperature, and conforming to ANSI Z21.18. 2.8 AUTOMATIC GAS VALVES A. The automatic gas valves shall be appliance type, electrically operated, on-off automatic control, and conforming to ANSI Z21.21. 2.9 THER

45、MOMETERS: 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. The water heaters shall be installed on concrete bases. Refer to S

46、pecification 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. C. The water heaters shall be installed and connected in accordance with manufacturers written instructions. D. All pressure and tempe

47、rature relief valves discharge shall be piped to a nearby floor drains. E. Thermometers shall be installed on the water heater inlet and outlet piping. F. Vent piping from gas-train pressure regulators and valves shall be piped to the outside of building and shall conform to NFPA 54. G. The thermost

48、ats shall be set for a maximum setting of 54C (130F). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-10 22 34 00 - 8 H. Shutoff valves shall be installed on the domestic water supply piping to the water heater and on the domestic hot water outlet

49、 piping. I. All manufacturerss required clearances shall be maintained. /J. The natural gas fueled domestic water heaters shall be installed with seismic restraint devices./ K. A combination temperature and pressure relief valve shall be installed at the top portion of the storage tank. The sensing element shall extend in