Copyright 2013 AIA MasterSpec Premium 03/13

PRODUCT MASTERSPEC LICENSED BY ARCOM TO WATTS.

Copyright 2013 by The American Institute of Architects (AIA)

Exclusively published and distributed by Architectural Computer Services, Inc. (ARCOM) for the AIA

This Product MasterSpec Section is licensed by ARCOM to WATTS ("Licensee").

This Product MasterSpec Section modifies the original MasterSpec text and does not include the full content of the original MasterSpec Section.

Revisions made to the original MasterSpec text are made solely by the Licensee and are not endorsed by, or representative of the opinions of, ARCOM or The American Institute of Architects (AIA). Neither AIA nor ARCOM are liable in any way for such revisions or for the use of this Product MasterSpec Section by any end user. A qualified design professional should review and edit the document to suit project requirements.

For more information about WATTS, contact WATTS; located at 815 Chestnut Street, North Andover, MA, 01845; Phone: (978) 689-6066; Fax: (978) 794-1848; Website: www.watts.com.

For more information about Watts Radiant, contact Watts Radiant; A WATTS Brand; located at 1630 East Bradford Pkwy, Suite B, Springfield, MO 65804; Phone: (800) 276-2419; Fax: (417) 864-8161; Website: www.wattsradiant.com.

For information about MasterSpec, contact ARCOM at (800) 424-5080 or visit www.MasterSpec.com.

SECTION 238313 - RADIANT-HEATING ELECTRIC CABLES

TIPS:

To view non-printing Editor's Notes that provide guidance for editing, click on MasterWorks/SingleFile Formatting/Toggle/Editor's Notes.

To read detailed research, technical information about products and materials, and coordination checklists, click on MasterWorks/Supporting Information.

Revise this Section by deleting and inserting text to meet Project-specific requirements.

Verify that Section titles referenced in this Section are correct for this Project's Specifications; Section titles may have changed.

PART 1 - GENERAL

1.1  RELATED DOCUMENTS

Retain or delete this article in all Sections of Project Manual.

  1. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division01 Specification Sections, apply to this Section.

1.2  SUMMARY

  1. Section includes electric heating cables for floor radiant heating, and snow and ice melting on pavement, with the following electric heating cables:
  2. Plastic insulated, series resistance.
  3. Related Requirements:

Retain subparagraphs below to cross-reference requirements Contractor might expect to find in this Section but are specified in other Sections.

  1. Section238323 "Radiant-Heating Electric Panels."

1.3  ACTION SUBMITTALS

  1. Product Data: For each type of product.
  2. Include rated capacities, operating characteristics, and furnished specialties and accessories.
  3. Schedule heating capacity, length of cable, spacing, and electrical power requirement for each electric heating cable required.
  4. Shop Drawings: For electric heating cable.
  5. Include plans, sections, details, and attachments to other work.
  6. Include diagrams for power, signal, and control wiring.

1.4  INFORMATIONAL SUBMITTALS

Retain "Site electrical power supply" Paragraph below if Contractor is responsible for coordinating electric heating cable electrical power requirements.

  1. Site electrical power supply: For electric heating cable.
  2. Include capacities of dedicated circuits.
  3. Indicate proper voltage and ampacity are available for electric heating cable requirements.

Retain "Field quality-control reports" Paragraph below if Contractor is responsible for field quality-control testing and inspecting.

  1. Field quality-control reports.

1.5  CLOSEOUT SUBMITTALS

  1. Operation and Maintenance Data: For electric heating cables to include in operation and maintenance manuals.

1.6  WARRANTY

When warranties are required, verify with Owner's counsel that warranties stated in this article are not less than remedies available to Owner under prevailing local laws.

  1. Warranty: Manufacturer agrees to repair or replace electric heating cable that fails in materials or workmanship within specified warranty period.

Verify available warranties and warranty periods for electric heating cable.

  1. Warranty Period: 25 years from date of manufacture for mat and cable and 1-3 years on controls from date of purchase.

PART 2 - PRODUCTS

Manufacturers and products listed in SpecAgent and MasterWorks Paragraph Builder are neither recommended nor endorsed by the AIA or ARCOM. Before inserting names, verify that manufacturers and products listed there comply with requirements retained or revised in descriptions and are both available and suitable for the intended applications. For definitions of terms and requirements for Contractor's product selection, see Section016000 "Product Requirements."

2.1  GENERAL REQUIREMENTS FOR ELECTRIC HEATING CABLES

  1. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA70, by a qualified testing agency, and marked for intended location and application.

2.2  PLASTIC-INSULATED, SERIES-RESISTANCE HEATING CABLES

Retain this article for ceiling and floor radiant heating, freezer-floor frost-heave prevention, and snow and ice melting on pavement. Some manufacturers limit use of this product to stone, ceramic tile, or concrete floors.

Retain "Basis-of-Design Product" Paragraph and list of manufacturers below to identify a specific product or a comparable product from manufacturers listed.

  1. Basis-of-Design Product: Subject to compliance with requirements, provide Watts Radiant; A WATTS Brand; TapeMat, WarmWire, SlabHeat, ProMelt Mat, ProMelt Cable, Underfloor Mat, or a comparable product by one of the following:
  2. Delta-Therm Corporation.
  3. Easy Heat; a brand of EGS Electrical Group LLC; a division of Emerson Industrial Automation.
  4. Nuheat; a brand of Pentair.
  5. Orbit Manufacturing.
  6. Raychem; Tyco Thermal Controls.
  7. WarmUp.
  8. WarmlyYours Radiant, Inc.
  9. Insert manufacturer's name>.
  10. Comply with UL1673 or UL1693.
  11. Heating Element: Single resistor wire. Terminate with waterproof, factory-assembled, nonheating leads with connectors for power supply.
  12. Electrical Insulating Jacket: Minimum 12.0-mil (0.30-mm) Tefzel or Hytrel.

Outer jacket in "Cable Cover" Paragraph below is optional feature and is required for waterproof applications; verify availability with manufacturer.

  1. Cable Cover: Stainless-steel braidor aluminum wrap with PVC, XLPE, or TPU outer jacket.
  2. Maximum Operating Temperature: 85 degF (29.4 degC) for floor surface temperature.

Retain "Cable-Heated Mats" Paragraph below for heating cables in factory-fabricated mats. Indicate length and spacing of cables on Drawings.

  1. Cable-Heated Mats: Factory-fabricated cable and fiberglass or plastic mesh with uniform 3-inch (76-mm) cable spacing, in [24-inch (610-mm)] [30-inch (762-mm)] [36-inch (914-mm)] widths.

If Project has more than one type or configuration of electric heating cable, delete "Capacities and Characteristics" Paragraph below and schedule on Drawings. See Evaluations for sample schedule.

  1. Capacities and Characteristics:

Retain "Maximum Heat Output (Cable)" Subparagraph below for loose-laid heating cables.

  1. Indoor Heating, Maximum Heat Output (Cable): [3W/ft. (9.85W/m)] [5W/ft. (16.4W/m)] <Insert value>.

Retain "Maximum Heat Output (Mat)" Subparagraph below for heating cables in factory-fabricated mats. Heat output depends on spacing of the heating cables within the mat. Verify output capacities with manufacturers.

  1. Maximum Heat Output (Mat): 12W/sq. ft. (129W/sq.m).

Retain "Spacing" Subparagraph below for cable-heated mats.

  1. Spacing: [2.5 inch (63.5-mm)] [3 inch (76-mm)] [3.5 inch (89-mm)] [4 inch (101.6-mm)] [6 inch (152.4-mm)].
  2. Electrical Characteristics for Single-Circuit Connection:

Verify available voltages, phase, and heat-output ratings with manufacturer. Most manufacturers supply this product in single phase only.

  1. Volts: [120] [240] <Insert value>.
  2. Phase: Single.
  3. Hertz: 60.
  4. Maximum Full-Load Amperes: 15.
  5. Minimum Circuit Ampacity: 18.75.
  6. Maximum Overcurrent Protection: 20.

Retain "Maximum Heat Output (Cable)" Subparagraph below for loose-laid heating cables.

  1. Outdoor Heating, Maximum Heat Output (Cable): 12W/ft. (129W/m).

Retain "Maximum Heat Output (Mat)" Subparagraph below for heating cables in factory-fabricated mats. Heat output depends on spacing of the heating cables within the mat. Verify output capacities with manufacturers.

  1. Maximum Heat Output (Mat): 50W/sq. ft. (538W/sq.m).

Retain "Spacing" Subparagraph below for cable-heated mats.

  1. Spacing: [3 inch (76-mm)] [4 inch (101.6-mm)].
  2. Electrical Characteristics for Single-Circuit Connection:

Verify available voltages, phase, and heat-output ratings with manufacturer. Most manufacturers supply this product in single phase only.

  1. Volts: [120] [208] [240] [277] Insert value>.
  2. Phase: Single.
  3. Hertz: 60.
  4. Maximum Full-Load Amperes: 50.
  5. Minimum Circuit Ampacity: 62.5.
  6. Maximum Overcurrent Protection: 70.

2.3  CONTROLS

Retain first paragraph below and delete remainder of this article to specify temperature controls in Section230923 "Direct Digital Control (DDC) System for HVAC" and Section230993.11 "Sequence of Operations for HVAC DDC." Delete first paragraph and retain remaining paragraphs to require controls integral to the radiant-heating electric cables to be provided by cable manufacturer.

  1. Comply with requirements in Section230923 "Direct Digital Control (DDC) System for HVAC" and Section230993.11 "Sequence of Operations for HVAC DDC" for control devices and sequence of operations for radiant-heating electric cables.

Retain "Wall-Mounted Thermostats for Floor Heating Cables" Paragraph below for room-temperature control of electric cables in ceilings and floors.

  1. Wall-Mounted Thermostats for Floor Heating Cables:
  2. Minimum temperature range from 50 to 99 degF (10 to 37 degC).
  3. Automatic floor temperature sensing with temperature setpoint operation.
  4. Manual override on-off function.

Retain "Precipitation and Temperature Sensor for Snow Melting on Pavement" Paragraph below to operate electric heating cable for snow melting on pavement.

  1. Precipitation and Temperature Sensor for Snow Melting on Pavement:
  2. [Microprocessor-based] [Automatic] control with manual on, automatic, and standby/reset switch.
  3. Precipitation and temperature sensors shall sense the surface conditions of pavement, or aerial sensing, and shall be programmed to energize the cable as follows:

Retain and revise features in "Temperature Span," "Adjustable Delay-Off Span," "Energize Cables," and "De-Energize Cables" subparagraphs below to suit Project. Verify available features with manufacturer.

  1. Temperature Span: 34 to 44 degF (1 to 7 degC).
  2. Adjustable Delay-Off Span: 30 to 90 minutes.
  3. Energize Cables: Following two-minute delay if ambient temperature is below set point and precipitation is detected.
  4. De-Energize Cables: On detection of a dry sensor surface plus time delay.
  5. Corrosion-proof and waterproof enclosure suitable for outdoor mounting, for controls and precipitation and temperature sensors.
  6. Minimum 30-A contactor to energize cable or close other contactors.

2.4  ACCESSORIES

  1. Cable Installation Accessories: Double-sided tape, hot glue and gun, cable securement straps, integrated wire underlayment,, cable ties, continuity tester, splice kits, and installation clips all furnished by manufacturer, or as recommended in writing by manufacturer.
  2. Embedded Heating-Cable Identification:
  3. Mechanically fastened signage with identification according to NFPA70 and complying with requirements in [Section101416 "Plaques."] [Section101419 "Dimensional Letter Signage."] [Section101423 "Panel Signage."]

PART 3 - EXECUTION

3.1  EXAMINATION

  1. Examine surfaces and substrates to receive electric heating cables or cable-heated mats for compliance with requirements for installation tolerances and other conditions affecting performance.
  2. Ensure surfaces in contact with electric heating cables or cable-heated mats are free of debris, burrs, and sharp protrusions.
  3. Ensure any substrate is cured and/or properly prepared prior to cable installation.
  4. Proceed with installation only after unsatisfactory conditions have been corrected.

3.2  APPLICATIONS

  1. Install the following types of electric heating cable for the applications described:
  2. Floor Radiant Heating: Plastic-insulated, series-resistance heating cable or cable heated mat.
  3. Snow and Ice Melting on Pavement: Plastic-insulated, series-resistance heating cable or cable heated mat.

3.3  INSTALLATION

Indicate location of controls on Drawings.

  1. Install electric heating cable or cable-heated mats across expansion, construction, and control joints according to manufacturer's written instructions; use cable-protection conduit and slack cable to allow movement without damage to cable.
  2. Do not energize cables embedded in concrete or plaster until those assemblies are cured.

Coordinate "Electric Heating-Cable Installation for Floor Radiant Heating" Paragraph below with Drawings. Indicate details of how cable-heating array is installed in floor.

  1. Electric Heating-Cable Installation for Floor Radiant Heating: Install heating cable or cable-heated mat with heat-conductive fill materials such as concrete to ensure direct contact with finished radiant surfaces.
  2. Electric Heating-Cable or Cable-Heated-Mat Installation for Snow and Ice Melting in Pavement:
  3. Install heating cable or cable-heated mat with heat-conductive fill materials such as asphalt, or concrete, to ensure direct contact with finished radiant surfaces.

Retain first subparagraph below to require a flush-mounted box to identify embedded heating array. Coordinate with paving Sections.

  1. Install embedded electric heating-cable or cable-heated-mat identification box where indicated in pavement before pavement work is completed.

Consider pavement-mounted sensor, or post-mounted sensor, for snow melting on pavement.

  1. Mount precipitation sensor in pavement or external of the snow melt area on a designated support post.
  2. Set field-adjustable switches and circuit-breaker trip ranges.

3.4  CONNECTIONS

  1. Ground equipment according to Section260526 "Grounding and Bonding for Electrical Systems."
  2. Connect wiring according to Section260519 "Low-Voltage Electrical Power Conductors and Cables."

3.5  FIELD QUALITY CONTROL

Retain "Testing Agency," "Manufacturer's Field Service," and "Perform the following tests and inspections" paragraphs below to identify who shall perform tests and inspections. If retaining second option in "Testing Agency" Paragraph or if retaining "Manufacturer's Field Service" or "Perform the following tests and inspections" Paragraph, retain "Field quality-control reports" Paragraph in "Informational Submittals" Article.

  1. Testing Agency: Owner will use a electrician to perform tests and inspections.

Retain "Perform the following tests and inspections" Paragraph below to require Contractor to perform tests and inspections.

  1. Perform the following tests and inspections:
  2. Perform tests before, during, and after, cable installation but before application of coverings such as insulation, concrete, or mortar.
  3. Test cables for electrical continuity before energizing.
  4. Test cables to verify rating and power input. Energize and measure voltage and current simultaneously.
  5. Repeat tests for continuity during, and after, applying finished surface on heating cables.

See Section014000 "Quality Requirements" for retesting and reinspecting requirements and Section017300 "Execution" for requirements for correcting the Work.

  1. Radiant-heating electric cables will be considered defective, or damaged, if they do not pass tests and inspections.
  2. Prepare test and inspection reports.

3.6  PROTECTION

  1. Protect installed heating cables, including nonheating leads and controls, from damage during construction.
  2. Remove and replace damaged radiant-heating electric cables and cable-heated mats.

END OF SECTION 238313

RADIANT-HEATING ELECTRIC CABLES / 238313 - 2