VA 22 05 33-2009 HEAT TRACING FOR PLUMBING PIPING.pdf

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1、12-09 22 05 33 - 1 SECTION 22 05 33 HEAT TRACING FOR PLUMBING PIPING 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、rement for supplying, installing, and testing of the electric heat tracing system of the plumbing piping. 1.2 RELATED WORK A. Section 22 05 11, COMMON WORK RESULTS FOR PLUMBING. B. Section 23 07 11, HVAC, PLUMBING, AND BOILER PLANT INSULATION: Pipe Insulation. 1.3 SUBMITTALS A. Submit in accordance

3、with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, and SAMPLES. B. The following product data shall be submitted: 1. Rated capacity 2. Length of cable 3. Cable spacing 4. Electrical power requirements C. The shop drawings shall include plans, sections, details, wiring diagrams, and attachments to o

4、ther work. The wiring diagrams shall include power, signal, and control wiring. D. Field quality control test reports shall be submitted. E. Operation and Maintenance data shall be included. 1.4 QUALITY ASSURANCE A. Manufacturer Qualifications: 1. Ten years experience in design, engineering, manufac

5、ture and support of specified system and components. B. Product Requirements: 1. Pipe or tank tracing cable assembly shall be factory assembled, immersed in water for a minimum of 12 hours, and then tested for insulation resistance, high potential breakdown and continuity before leaving the factory.

6、 2. Factory Mutual approved constant wattage cable. 3. UL Listed, thermostat and contactor panel. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-12-09 22 05 33 - 2 4. UL Listed Control/Monitor Panel 1.4 APPLICABLE PUBLICATIONS A. The publications li

7、sted below form a part of this specification to the extent referenced. The publications are referenced in the text by the basic designation only. B. International Code Council, (ICC): IPC-06, (R 2007) . International Plumbing Code C. The Institute of Electrical and Electronic Engineers (IEEE): IEEE

8、515.1, (R 2007) . Recommended Practice for the Testing, Design, Installation, and Maintenance of Electrical Resistance Heat Tracing for Commercial Applications 1.5 AS-BUILT DOCUMENTATION A. The electronic documentation and copies of the Operations and Maintenance Manual, approved submittals, shop dr

9、awings, and other closeout documentation 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 used to prepare the electronic documentation shall have a Voluntary Product A

10、ccessibility 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 Template shall be enabled in the prepared electronic files. As Adobe Acrobat is a commo

11、n 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.” B. Four sets of manufacturers literature and data updated to include submittal review c

12、omments 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 procedures, including piping isometrics, wiring diagrams of all circuits, a

13、 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 procedures for emergency situations. Notes on all special systems or devices s

14、uch as damper and door closure interlocks Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-12-09 22 05 33 - 3 shall be included. A List of recommended spare parts (manufacturer, model number, and quantity) shall be furnished. Information explaining an

15、y special knowledge or tools the owner will be required to employ shall be inserted into the As-Built documentation. PART 2 - PRODUCTS 2.1 PLASTIC INSULATED SERIES RESISTANCE HEATING CABLES A. The plastic insulated series resistance heating cables shall comply with IEEE 515.1. B. The heating element

16、 shall be a single or dual strained resistor wire. Terminations shall be made with waterproof, factory assembled non heating leads with connectors at both ends. C. The Electrical insulated jacket shall be a minimum 0.10 milllimeter (4.0 mil) Kapton with silicone jacket or Tefzel. The cable cover sha

17、ll be aluminum braid /and silicone or Hylar outer jacket/. D. The maximum operating temperature shall be 150C (300F). E. The capacities and characteristics shall be: 1. Maximum heat output 2. Pipe Diameter: 3. Number of parallel cables: 4. Spiral wrap pitch: 5. Volts: 6. Phase: 7. Hertz: 8. Full loa

18、d amps : 9. Minimum circuit ampacity : 10. Maximum over current Protection: 2.2 SELF REGULATING PARALLEL RESISTANCE HEATING CABLES A. The heating element shall be a pair of parallel No. 16 AWG /tinned/ /nickel coated/ stranded copper bus wires embedded in cross linked conductive polymer core, which

19、varies heat output in response to temperature along its length. Cables shall be terminated with waterproof, factory assembled non heating leads with connects at one and seal the opposite end watertight. The cable shall be capable of crossing over itself without overheating. B. The electrical insulat

20、ing jacket shall be flame retardant polyolefin. C. The cable cover shall be /tinned copper/ /stainless steel/ braid /,and polyolefin outer jacket with UV inhibitor/. D. The maximum power on operating temperature shall be 65C (150F). Provided by IHSNot for ResaleNo reproduction or networking permitte

21、d without license from IHS-,-,-12-09 22 05 33 - 4 E. The maximum power off exposure temperature shall be 85C (185F) F. The capacities and characteristics shall be: 1. Maximum heat output 2. Pipe Diameter: 3. Number of parallel cables: 4. Spiral wrap pitch: 5. Volts: 6. Phase: 7. Hertz: 8. Full load

22、amps: 9. Minimum circuit ampacity: 10. Maximum over current Protection: 2.3 CONSTANT WATTAGE RESISTANCE HEATING CABLES A. The heating element shall be a pair of parallel No. 12 AWG, /tinned/ /nickel-coated/ stranded copper bus wires with single stranded resistor wire connected between bus wires. The

23、 heating element shall be terminated with waterproof, factory assembled non-heating leads with connectors at one end, and seal the opposite end watertight. B. The electrical insulating jacket shall be flame retardant fluoropolymer. C. The cable cover shall be /tinned copper/ /stainless steel/ braid

24、and polyolefin outer jacket with UV inhibitor. D. The maximum operating temperature shall be 200C (392F). E. The capacities and characteristics shall be: 1. Maximum heat output 2. Pipe Diameter: 3. Number of parallel cables: 4. Spiral wrap pitch: 5. Volts: 6. Phase: 7. Hertz: 8. Full load amps : 9.

25、Minimum circuit ampacity : 10. Maximum over current Protection: Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-12-09 22 05 33 - 5 2.4 CONTROLS A. Pipe mounting thermostats for Freeze protection shall have be a remote bulb unit with adjustable temper

26、ature range from minus 1 to 10C (30 to 50F). The thermostat shall be snap action, open-on-rise, single pole switch with minimum current rating adequate for the connected cable. The thermostat shall be remote bulb on capillary, resistance temperature device, or thermistor for direct sensing of pipe w

27、all temperature. The control enclosure shall be corrosion resistant and waterproof. B. The precipitation and temperature sensor for snow melting on roofs and in gutters shall be /automatic/ /microprocessor/ based control with manual on, automatic, and standby/reset switches. The precipitation and te

28、mperature sensors shall sense the surface conditions of roof and/or gutters and shall be programmed to energize the cable as follows: 1. Temperature span between 1 to 7C (34 to 44F) 2. Adjustable delay off span between 30 and 90 minutes. 3. Following a two minute delay, the cables shall be energized

29、 if ambient temperature is below set-point and precipitation is detected. 4. The cables shall be de-energized upon detection of a dry surface plus a time delay of 15 minutes. C. The enclosure shall be corrosion resistant and waterproof suitable for outdoor mounted. D. A minimum 30 amp contactor shal

30、l be provided to indicate operational status, on/off control, and for interface with central energy management and control system. E. A programmable timer for domestic hot water temperature maintenance shall have the following features: 1. micro-processor based 2. capable of four separate operation

31、schedules 3. On/off/Auto switch 4. A 365 day calendar with 20 programmable holidays. 5. Relays with contacts to indicate operational status, on/off status, and to interface with the central energy management and control system. Provided by IHSNot for ResaleNo reproduction or networking permitted wit

32、hout license from IHS-,-,-12-09 22 05 33 - 6 PART 3 - EXECUTION 3.1 INSTALLATION SPEC WRITERS NOTE: Evaluate the need to place heat tracing cables on emergency power on any service support acute patient care A. Electric heating cable shall be installed for the following applications: 1. Snow and ice

33、 melting on roofs, in gutters, roof drain bodies, and roof drain leaders. /2. Self regulating parallel resistance cable shall be installed for temperature maintenance for domestic hot water./ 3. Freeze protection of plumbing piping. B. Electric heating cable shall be installed across expansion, cons

34、truction, and control joints according to the manufacturers recommendations using cable protection conduit and slack cable to allow for movement without damage to cable. C. The installation of electric heating cable for snow and ice melting on roofs, gutters, and roof drain leaders shall be provided

35、 with clips furnished by the manufacturer that is compatible. D. Electric heating cable for pipe freeze protection shall be installed according to the following: 1. Electric heating cables shall be installed after piping has been tested and before insulation is installed. 2. Electric heat cables sha

36、ll be installed according to IEEE 515.1 3. Insulation shall be installed or applied over piping with electric cables 4. Warning tape shall be installed on pipe insulation where piping is equipped with electric heating cables. E. Electric heating cable for domestic hot water temperature maintenance s

37、hall be installed according to the following: 1. Electric heating cables shall be installed after piping has been tested and before insulation is installed. 2. Insulation shall be installed or applied over piping wit electric cables 3. Warning tape shall be installed on pipe insulation where piping

38、is equipped with electric heating cables. F. Field adjustable switches and circuit breaker trip ranges shall be set. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-12-09 22 05 33 - 7 G. Heating cables including leads shall be protected from damage.

39、H. Equipment shall be grounded according to Division 26. I. Wiring shall be connected according to Division 26. 3.2 TESTS A. Tests shall be performed after cable installation but before the application of coverings such as insulation, wall or ceiling construction, or concrete. The cables shall be te

40、sted for electrical continuity and insulation integrity before energizing. The cables shall be tested to verify rating and power input. The cables shall be energized and voltage and current measured simultaneously. Test repeatedly after repairing heating cables with new products. - - - E N D - - - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-