Heat Tracing for HVAC Pipingme- Building Group

Heat Tracing for HVAC Pipingme- Building Group

Heat Tracing for HVAC PipingME- Building Group

SECTION 230533–HEAT TRACING FOR HVAC PIPING

PART 1 - GENERAL

1.1SUMMARY

  1. This Section includes heating cables for the following applications:
  2. Heat tracing.
  3. Related Sections include the following:
  4. Division23 Section "HVAC Piping Insulation" and the errata for piping systems requiring heat tracing.

1.2SUBMITTALS

  1. Product Data: For each type of product indicated.
  2. Shop Drawings: Diagram power, signal, and control wiring and differentiate between manufacturer-installed and field-installed wiring.
  3. Field Test Reports: Indicate and interpret test results for compliance with performance requirements.
  4. Maintenance Data: For electric heating cables to include in maintenance manuals specified in Division1.

1.3QUALITY ASSURANCE

  1. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA70, Article100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use.

1.4WARRANTY

  1. General Warranty: Special warranty specified in this Article shall not deprive Owner of other rights Owner may have under other provisions of the Contract Documents and shall be in addition to, and run concurrent with, other warranties made by Contractor under requirements of the Contract Documents.
  2. Special Warranty: Written warranty, executed by manufacturer agreeing to repair or replace components of electric heating cables that fail in materials or workmanship within specified warranty period.
  3. Warranty Period: As specified in the Supplementary Conditions.

PART 2 - PRODUCTS

2.1MANUFACTURERS

  1. Basis-of-Design Product: The design is based on Raychem Corporation.Provide cables, controllers, and controls as shown on drawings and approved by the engineer. Provide either this product or a comparable product by one of the following.
  2. Nelson Heat Tracing Systems.
  3. Raychem Corporation.
  4. Thermon Manufacturing Co.

2.2HEATING CABLES

  1. Heat-Tracing Cables: Self-regulating, electric heating cables suitable for freeze protection of metal or plastic piping.
  2. Cables: Pair of parallel No.16AWG tinned-copper bus wires embedded in cross-linked conductive polymer core, which varies power output in response to temperature along its length.
  3. Cable shall be capable of crossing over itself without overheating.
  4. Heat Output: At least 90 percent of rating at a temperature of 40 degF pipe temperature.
  5. Cable Cover: Fabricated of cross-linked, modified, polyolefin dielectric jacket; tinned-copper braid; and polyolefin outer jacket with ultraviolet inhibitor.

2.3ACCESSORIES

  1. Cable Installation Accessories: Provide tapes, cable ties, warning labels, end seals and splices, and installation clips.

PART 3 - EXECUTION

3.1EXAMINATION

  1. Examine surfaces and substrates to receive heating cables for compliance with requirements for installation, tolerances, and other conditions affecting performance.
  2. Ensure surfaces and pipes in contact with electric heating cables are free of burrs and sharp protrusions.
  3. Ensure pipe testing is complete.
  4. Ensure surfaces and substrates are level and plumb.
  5. Test cables for electrical continuity before installing.
  6. Test cables for insulation resistance before installing.
  7. Proceed with installation only after unsatisfactory conditions have been corrected.

3.2INSTALLATION

  1. Install heat trace system according to manufacturer’s written instructions.
  2. Cut cable to length required.
  3. Install heater-to-cold lead connections in accessible locations. Do not embed in concrete or plaster.
  4. Avoid crossing expansion, construction, or control joints with heating cables. Provide sufficient slack conductor in expansion loop.
  5. Do not install heating cable mats across expansion, construction, or control joints.

3.3CONNECTIONS

  1. All electrical installation will be by this Bid Package. Power shall be obtained by this Contractor from the location as directed by the Owner.
  2. Electrical installation requirements are specified in Division16 Sections.
  3. Coordination will be required with Electrical Trades.
  4. Connect heating cables and other components to wiring systems.
  5. Ground equipment.
  6. Tighten electrical connectors and terminals according to manufacturer's published torque-tightening values. If manufacturer's torque values are not indicated, use those specified in UL486A and UL486B.

3.4FIELD QUALITY CONTROL

  1. Testing: Perform tests after installation but before application of coverings, such as insulation.
  2. Test cables for electrical continuity before energizing.
  3. Test cables for insulation resistance before energizing. Remove cables if measured resistance is less than 10 megohms to ground.
  4. Test cables to verify rating and power input. Energize and measure voltage and current simultaneously.
  5. Repeat tests for continuity, insulation resistance, and input power after applying thermal insulation.
  6. Repair or replace malfunctioning units. Retest as specified above after repairs or replacements are made.

3.5ADJUSTING

  1. Set field-adjustable switches and circuit-breaker trip ranges as indicated.

3.6PROTECTION

  1. Protect installed heating cables, including leads, from damage before Substantial Completion.

END OF SECTION

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Revision Date: 01/21/14 Project & Bid Package

File name: 230533 HEAT TRACING FOR HVAC PIPING.doc