ProMelt Electric Snow Melting Mats
By SunTouch® – A Division of Watts Water Technologies, Inc.
Tired of shoveling snow before work? Having trouble driving safely because of snow and ice buildup? SunTouch ProMelt Snow Melting Systems provide reliable electric radiant heating for residential and commercial outdoor applications.
SunTouch ProMelt products are designed to eliminate snow and ice accumulation from outdoor surfaces. This installation manual provides guidance for designing and installing ProMelt Mats and ProMelt Cables, including layout planning, controls, installation precautions, and surfacing recommendations.
Specifications for ProMelt Mats
Available Sizes: 2 ft. and 3 ft. widths, lengths from 5 ft. to 56 ft.
Voltages: 120V, 208V, 240V, and 277V AC, single phase
Heat Output: 50 Watts per Sq. Ft. (170 Btu/h/Sq. Ft.) and 38 Watts per Sq. Ft. (130 Btu/h/Sq. Ft.)
Maximum Heater Current: 24 amps
Maximum Circuit Load: 50 amps
Protection Required: GFCI Class B protection required for each circuit
Listings: ETL Listed for U.S. and Canada under UL 515, IEEE 515.1, and CAN/CSA C22.2 No. 130-03
Listing File Number: 3151992
Application: Outdoor use only. Must be embedded in concrete, asphalt, or sand.
Minimum Bend Radius: 1 inch
Maximum Continuous Exposure Temperature: 221°F (105°C)
Maximum Asphalt Exposure Temperature: 285°F (140°C)
Minimum Installation Temperature: 40°F (4.5°C)
Installation must be performed by qualified personnel in accordance with local electrical codes, NEC Article 426, and Canadian Electrical Code Section 62 Part I.
Specifications for ProMelt Cable
ProMelt Cable is a complete heating cable system consisting of a series resistance heating cable and a single power lead for easy single-point electrical connection.
The heating cable cannot be cut or shortened.
Voltages: 120V, 208V, 240V, and 277V AC, single phase
Heat Output: 50 Watts per Sq. Ft. spaced at 3 inches on center
Alternate Heat Output: 38 Watts per Sq. Ft. spaced at 4 inches on center
Cable Output: Approximately 12.5 Watts per linear foot at rated voltage
Maximum Heater Current: 24 amps
Maximum Circuit Load: 50 amps
Protection Required: GFCI Class B protection required for each circuit
Listings: ETL Listed for U.S. and Canada under UL 515, IEEE 515.1, and CAN/CSA C22.2 No. 130-03
Listing File Number: 3151992
Application: Outdoor use only. Must be embedded in concrete, asphalt, or sand.
Minimum Bend Radius: 1 inch
Maximum Continuous Exposure Temperature: 221°F (105°C)
Maximum Asphalt Exposure Temperature: 285°F (140°C)
Minimum Installation Temperature: 40°F (4.5°C)
Important Installation Warnings
Installation must be performed by qualified personnel in accordance with local codes and standards. Failure to follow these instructions may result in fire, electric shock, property damage, serious injury, or death.
NEVER cut or modify the heating cable.
NEVER overlap heating cables or place heating cable closer than 2 inches from another heating cable or power lead.
NEVER pull heating cable or factory splices into conduit.
NEVER attempt to repair damaged heating cable.
ALWAYS disconnect power before installation or service.
ALWAYS completely embed heating cable and factory splices in concrete, sand, or asphalt.
ALWAYS maintain at least 2 inches clearance from underground piping or electrical wiring.
ALWAYS keep power lead ends dry during installation.
ALWAYS provide GFCI protection for the snow melting system.
ALWAYS verify voltage and amperage requirements before installation.
ALWAYS follow NEC, CEC, and local electrical codes.
Typical ProMelt Installation Ideas
ProMelt Mats work exceptionally well on outdoor stairs and ramps.
Driveway installations can include full coverage near garage entrances and tire-track coverage down the driveway.
ProMelt Mats and ProMelt Cables can be combined to fit custom outdoor layouts.
Phase 1: Designing the System
STEP 1.1
Determine the area to be heated.
Determine the outdoor areas where snow and ice melting protection is required.
Typical applications include:
- Driveways
- Walkways
- Patios
- Permanent ramps
- Masonry stairs and benches
- Shipping docks
- Garage door thresholds
ProMelt systems are designed for outdoor snow melting applications only and must be fully embedded in concrete, asphalt, sand, or mortar beds.
Do not install ProMelt systems:
- Inside buildings
- In hazardous or classified areas
- For roof or gutter de-icing
- For pipe freeze protection
- Under wood or composite decking
- On non-masonry stair systems
For paver applications, heating the full area is recommended to reduce re-freezing and possible paver movement.
STEP 1.2
Measure and plan the installation area.
Create a drawing showing all heated areas and obstructions.
Identify all locations where ProMelt Mats or ProMelt Cable will be installed.
Follow these guidelines:
- Maintain at least 6 inches from slab edges
- Maintain 12 inches from asphalt edges without curbs
- Avoid crossing expansion joints whenever possible
- Maintain at least 2 inches clearance from underground pipes and cables
- Allow 2 to 4 inches spacing between adjacent heating cable runs
- Do not install beneath permanent fixtures or structures
WARNING: Heating cable cannot be cut shorter to fit.
Select the correct mat or cable size for the installation area.
The heating cable and all factory splices must be fully embedded in approved materials.
Only the power leads may exit the heated area.
STEP 1.3
Determine junction box locations.
Plan junction box locations carefully to allow proper routing of power leads and sensor wiring.
Indoor wall-mounted junction boxes are preferred whenever possible.
Standard ProMelt power leads are 20 feet long and custom lengths up to 50 feet may be available.
Outdoor junction boxes must be properly rated for outdoor and wet-location use.
STEP 1.4
Select the proper ProMelt Mats or ProMelt Cable.
Choose products based on voltage, watt density, and total heated area.
50 Watts per Sq. Ft. is recommended for moderate to heavy snowfall climates.
38 Watts per Sq. Ft. may be suitable for lighter snowfall areas.
If an exact size is unavailable, select the next smaller size.
Circuit sizing guidelines:
- 20 amp circuit = up to 16 amp load
- 30 amp circuit = up to 24 amp load
- 40 amp circuit = up to 32 amp load
- 50 amp circuit = up to 40 amp load
- 70 amp circuit = up to 50 amp load
STEP 1.5
Determine CableStrap requirements.
If installing ProMelt Cable over existing slabs, CableStrap is required to properly secure cable spacing.
One box of CableStrap contains approximately 25 feet of strap and typically covers about 50 Sq. Ft. of cable installation.
STEP 1.6
Select controls and sensors.
Choose controls and sensors based on project size and zoning requirements.
Single-zone systems typically use one control and one sensor.
Multi-zone systems require separate controls and sensors for each zone.
Available sensor options may include:
- Automatic snow sensors
- Pole-mounted moisture sensors
- In-slab snow sensors
Always follow manufacturer installation requirements for controls and sensors.
STEP 1.7
Plan electrical requirements.
Dedicated electrical circuits are required for ProMelt systems.
All circuits must include GFCI protection.
Size breakers and wiring according to local electrical codes and continuous-load requirements.
All electrical work must comply with NEC, CEC, and local code requirements.
STEP 1.8
Insulation considerations.
Insulation beneath outdoor heated slabs is generally not recommended.
Improper insulation installation may contribute to slab cracking and potential heating cable damage.
Phase 2: Preparations
STEP 2.1
Fully read and understand this entire manual before beginning installation.
Make sure all materials, tools, controls, sensors, and electrical components are available before starting the project.
STEP 2.2
Inspect all ProMelt Mats, ProMelt Cables, controls, and accessories for shipping damage.
Do not install damaged materials.
Verify the correct voltage, size, and wattage for the installation area.
STEP 2.3
Use a digital multi-meter to measure the resistance between the conductors of the mat/cable power leads.
Compare the resistance readings to the factory nameplate label attached to the product.
The resistance reading should be within the acceptable factory tolerance range.
Record these readings in Table 3 under “Out of the box before installation”.
If the resistance reading is outside the acceptable range, contact the manufacturer before installation.
STEP 2.4
If possible, have the electrician perform an insulation resistance test on the mat/cable.
A meg ohmmeter (Megger®) adjusted to a minimum 1000 VDC should provide a measured value of at least 20 meg ohm (MΩ).
Record these readings in Table 3.
WARNING: Megohmmeters apply high voltage and should only be used by qualified personnel.
STEP 2.5
Prepare the installation area by cleaning away debris, sharp objects, and materials that may damage the heating cable.
Ensure the surface is structurally sound and properly prepared for the final surface material.
STEP 2.6
Verify all dimensions and layout drawings before installation begins.
Double-check all conduit, junction box, and sensor locations.
STEP 2.7
Plan the routing of power leads and sensor wires carefully.
Do not allow heating cable or factory splices to enter conduit.
Only the cold lead power wiring may enter conduit.
STEP 2.8
If using reinforcement mesh or rebar, make sure it is properly secured before installing ProMelt Mat or Cable.
Sharp edges should be avoided or protected to prevent cable damage.
STEP 2.9
Install all required junction boxes according to local electrical codes.
Outdoor junction boxes must be rated for wet locations.
STEP 2.10
Install conduit from the junction box location to the heated slab area.
Separate conduit may be required for power leads and slab sensor wiring depending on local code requirements.
STEP 2.11
If required, install a slab sensor conduit from the control location into the heated area.
The sensor should be positioned halfway between heating cables whenever possible.
STEP 2.12
Make sure all conduit ends are protected with bushings to help prevent damage to power leads or sensor wiring.
STEP 2.13
Install conduit from the junction box to the edge of the slab to be heated.
Extend this conduit into the slab edge about 2 to 6 inches and attach a bushing to the end to prevent damaging the mat/cable power leads.
• Follow electrical code for burial depth of the conduit.
• Plan carefully if you are installing edge pavers, edge drainage systems, landscaping, or other items that affect where the conduit comes in.
STEP 2.14
If a slab sensor is to be embedded in the heated area, install conduit from the control location to the desired slab location.
Follow the sensor instructions for proper placement and connections.
STEP 2.15
Install the circuit breaker size and type as determined earlier in Step 1.7 (Designing the System).
DO NOT connect the branch wiring to the breaker yet.
STEP 2.16
Label the circuit breaker in the panel which feeds this Snow Melt mat system with “Snow Melt” or similar.
Phase 3: Installation of Mat and/or Cable
The following Steps 3.1 through 3.12 cover installation basics.
Steps 3.13 through 3.14 cover some specific applications and their special requirements.
BASIC INSTALLATION
STEP 3.1
Determine a time to install the mat/cable when equipment, heavy tools, and site traffic will be minimal to keep from possibly damaging the product.
Be prepared to apply the surfacing courses over the mat/cable the same day so it will be protected from damage.
If installing mat/cable in the upper layer of a two-stage concrete slab or the upper layer of an asphalt application, the mat or cable should be completely ready for the second stage.
There is limited time between stages, as the slab should not be allowed to fully cure or the asphalt to completely cool.
Therefore, if using ProMelt Cable, you may want to lay it out and tie it to rewire that can be quickly lifted into place after the first is laid.
This might also be preferable for a mat installation, although if mats are precut and shaped to the area, they generally can be rolled into place fairly quickly.
If a slab sensor is installed in this second layer, plan ahead so this does not cause the first layer to cure or cool too much.
Inspect the area and remove any sharp objects.
Install in temperatures at least 40°F (4.5°C).
STEP 3.2
Begin by test-fitting the mat or cable in the area to be heated.
For mat installation, unroll it completely.
Turn and flip it by cutting the tape where needed.
Make sure it fits the area properly.
For cable installation, make sure it fits the area with no excess cable.
IMPORTANT: This heating cable CANNOT be cut shorter to fit.
Do not overlap or cross over heating cable on itself.
Do not space heating cable closer than 2 inches.
Mat/cable cannot be laid closer than 6 inches from the edges of slabs.
In asphalt applications, this increases to 12 inches from the edge where no curb is provided.
• Avoid crossing expansion joints in a slab unless proper technique and protection steps are followed.
• Avoid placing the heating cable any closer than 2 inches from other items such as underground cable or piping to keep from overheating them.
• Allow at least 2 inches, but not more than 4 inches, between adjacent mats or sections of a mat where the mat tape is cut and turned to fill the area.
WARNING: The heating cable and factory splices of ProMelt Mat and/or Cable must be completely embedded in the concrete, sand, or asphalt.
Never try to use excess heating cable in surrounding soil, walls, or other unprotected applications.
• Do not repeatedly bend the heating cable, and never bend factory splices.
STEP 3.3
Place the power leads of the mat/cable next to the conduit entry.
The electrician will pull this through the conduit later.
Make sure it is positioned so that no part of the splice connection or the heating cable will be pulled into the conduit.
STEP 3.4
Concrete Application
ProMelt Mat: Begin laying out and securing the mat about every 2 feet to the reinforcement mesh or rebar using plastic cable ties around the heating cable.
Turn the cable tie ends downward, or trim them so they will not poke up through the surface layers.
Do not use metal ties as they may damage the cable.
If installing on top of an existing slab, secure the mat by nailing through the tape every 2 feet or so.
NEVER strike the heating cable with a hammer.
ProMelt Cable: Begin securing the heating cable at the desired spacing to the reinforcement mesh or rebar using plastic cable ties.
These cable ties should be applied at the ends of each run and at every 3 to 4 feet.
Turn the cable tie ends downward, or trim them so they will not poke up through the surface layers.
Do not use metal ties as they may damage the cable.
If installing on top of an existing slab, secure CableStrap to the surface.
Use nails or similar every 6 to 10 inches.
CableStrap should be placed at either end of the heated area, and additional straps should be applied every 3 to 4 feet in between to hold the cable in place during surfacing.
STEP 3.5
Asphalt Application
Begin laying and securing the mat to the first course using nails, staples, or similar fasteners into the mat tape every 2 feet or so.
Make sure it is laid flat.
Do not use metallic nails or staples directly over the heating cable.
Be careful not to damage the heating cable.
ProMelt Cable: Secure CableStrap to the surface.
Use nails or similar every 6 to 10 inches.
CableStrap should be placed at either end of the heated area, and additional straps should be applied every 3 to 4 feet in between to hold the cable in place during surfacing.
STEP 3.6
Stone or Paver Application
Begin laying out the mat and secure it onto the base with landscape fabric stakes or similar over the mat tape every 2 feet or so.
Make sure it is laid flat.
Do not use metallic stakes or staples directly over the heating cable.
Be careful not to damage the heating cable.
ProMelt Cable: Secure plastic mounting cable ties to the gravel base, driving long nails or similar through the head of the cable tie.
These cable ties should be applied at the end of each run and at every 3 to 4 feet.
Do not use metallic cable ties as they may damage the cable.
Lay out the cable and secure with the cable ties.
STEP 3.7
Ceramic or Stone Tile Applications
1) Dry-set or Latex-Portland Cement (thin-set) Mortar Application – For this application, the mat or cable is installed in the slab no less than 1.5 inches and no deeper than 2 inches below the top surface, so follow recommendations in Section 3.4 for mat or cable.
2) Cement Mortar or Thick-set Application – For this application, the cable will be installed in a minimum 1.25-inch thick mortar bed above the structural slab.
Begin laying out the mat and securing to the top of the slab by nailing through the tape every 2 feet or so.
Never strike the heating cable with a hammer.
Minimum 1.25-inch mortar bed will be installed over the cables.
ProMelt Cable: Secure CableStrap to the surface of the slab using nails spaced every 6 to 10 inches.
CableStraps should be placed at either end of the heated area for the initial layout.
Additional straps should be placed every 3 to 4 feet to hold the cables in place during application of the thick-set mortar.
Minimum 1.25-inch mortar bed will be installed over the cables.
STEP 3.8
If you need to cut and turn the mat, or fill odd areas, you may use scissors to carefully cut the tape holding the heating cables.
Heating cables should be secured at about 3 inches apart, and no less than 2 inches apart.
CAUTION: Be careful not to kink or sharply bend the heating cable.
A minimum bend radius of 1 inch should be maintained.
Turn techniques for ProMelt Mats
STEP 3.9
Use a digital multi-meter to measure the resistance between the conductors of the mat/cable power leads again.
Record these resistances in Table 3 under “After mat/cable is secured in place”.
STEP 3.10
Feed the power leads through the conduit into the junction box, leaving at least 6 inches of free lead length.
Secure the heating cable and splice so they will not be pulled into the conduit.
Insert a generous amount of electrical conduit sealant into the conduit end around the power leads to help prevent water entry.
STEP 3.11
If a slab sensor is being installed, place the sensor socket according to the manufacturer instructions.
Secure and seal it to the conduit installed earlier.
The sensor should be located halfway between heating cables and in an area recommended by the sensor manufacturer.
Make sure the top of the sensor will be flush with the surface of the finish layer.
Make sure it is protected with a cap or seal.
STEP 3.12
Take a photo of the mat/cable installation.
This can be very helpful later for utility work, future changes to the site, or to avoid accidental damage.
Keep the photos with this installation manual.
SPECIAL APPLICATIONS
STEP 3.13
Stairs: If you are installing ProMelt Mat onto stairs, carefully cut the tape holding the heating cable.
If installing ProMelt Cable, skip the previous step.
Secure a single run of cable to the side of a riser.
Lay 3 or 4 runs of cable on the tread area as needed and continue up each stair.
Follow these guidelines:
• Lay cable no greater than 3 inches from the front edge of the finished tread. Otherwise this edge may not melt snow properly.
• Lay cable no less than 6 inches from the side edges of the finished tread.
• Account for future hand railings that could be mounted onto the tread, especially in the middle of a long tread if required.
Use a marker or indicate on drawings where the railing may be safely installed later.
• Avoid pinching or sharply bending the cable.
At the corner of the riser and tread, maintain a minimum 1-inch radius bend, while securing it flat enough so the surface concrete or pavers will not pinch the cable.
• Do not install the mat/cable on or under non-masonry stairs such as wood or composite construction.
ProMelt Mat on stairs
ProMelt Cable on stairs
STEP 3.14
Expansion Joints: ProMelt heating cable must never be run through an expansion joint.
Doing so may cause damage to the cable as the slab moves.
It is recommended to lay the mat so expansion joints are avoided whenever possible.
However, if necessary, a portion of the heating cable may be dropped into the grade below the expansion joint as shown.
Fill around the cable with at least 1 inch thick sand.
The loop of heating cable should be long enough to allow flexing and must not be embedded into the concrete.
The sand helps protect the cable and allows movement with slab expansion and contraction.
Phase 4: Finish Surfaces
STEP 4.1
Before beginning work, inspect the mat/cable for damage and secure any mat/cable that may have come loose.
To avoid burying any possible damage that may have occurred since the mat was laid, the following tests should be performed:
Use a digital multi-meter to measure the resistance between the conductors of the mat/cable power leads again (see Step 2.3).
If possible, your electrician should perform an insulation resistance test on the mat/cable.
A meg ohmmeter (Megger®) adjusted to a minimum 1000 VDC should provide a measured value of at least 20 meg ohm (MΩ).
CAUTION: Be prepared to install a marker plate or other identification indicating the presence of ProMelt in the slab.
This helps alert future workers and helps avoid accidental damage during future site work.
Install a marker plate where clearly visible in each snow-melted area.
A marker plate is placed flush in wet concrete or soft asphalt surfaces.
Other surface types should allow the marker plate to remain flush with the finished surface.
Do not damage the heating cable.
STEP 4.2
Concrete Application
Pour concrete over the base and ProMelt Mat/Cable so that no less than 1-1/2 inches and no more than 3 inches covers the top of the heating cables.
The slab should be a minimum of 4 inches thick total. Driveways normally require thicker slabs.
Follow local building code requirements for proper slab thickness.
CAUTION: Do not use sharp tools which could damage the ProMelt system.
Blunted shovels should allow you to work the concrete carefully into all areas.
• Make sure the heating cable is fully embedded, including 2 to 6 inches of the conduits enclosing the power lead and slab sensor wiring (if used).
Allow the concrete to fully cure as required by the concrete supplier.
Do not energize the ProMelt Mat/Cable except for brief testing, as this may improperly accelerate curing and potentially damage the concrete.
STEP 4.3
Asphalt Application
If required, apply a prime coat to the first course or untreated base over the top of the cable.
Use 1/2-inch aggregate or smaller. Larger aggregate can cut or pinch the cable.
Before applying asphalt, ensure the temperature is not greater than 285°F (140°C).
Good asphalt compaction requires a specific temperature range depending on the asphalt type being installed.
Manually lay the asphalt onto the area.
Do not apply asphalt with paving machines as they may damage the heating cable.
Spread the asphalt so that no less than 1-1/2 inches and no more than 3 inches covers the top of the heating cables.
Compact the asphalt with a power roller as recommended.
If possible, move the roller perpendicular to the cable direction to help reduce stress on the cable below.
Be careful not to stop or start the roller directly over the mats, as asphalt shifting may damage the cables.
• Make sure the heating cable is fully embedded, including 2 to 6 inches of the conduits enclosing the power lead and slab sensor wiring (if used).
• DO NOT energize the ProMelt system until the asphalt is fully cooled and cured according to the asphalt manufacturer recommendations.
STEP 4.4
Stone or Paver Application
Manually spread sand over the cables and base so that no less than 1-1/2 inches covers the top of the heating cables.
Be careful not to use sharp tools.
Compact the sand as recommended by the paver supplier while being careful not to uncover any ProMelt Mat/Cable or damage conduits entering the slab area.
Use hand compacting tools around conduit areas.
Add additional sand if necessary to maintain a minimum 1-1/2 inches over all cables and conduits.
• Make sure the heating cable is fully embedded, including 2 to 6 inches of the conduits enclosing the power lead and slab sensor wiring (if used).
Place the pavers over the top and finish as required.
It is highly recommended that pavers be no more than 2-1/2 inches thick.
STEP 4.5
Ceramic or Stone Tile Applications
For either application below, exterior-grade materials should be selected and installed according to manufacturer recommendations.
Only vitreous (non-porous) tile should be used, as porous tile may absorb moisture and eventually fail.
The maximum thickness above the cable should be no less than 1.5 inches and no more than 2.5 inches.
A movement joint should be installed between heated and non-heated areas.
1) Dry-set or Latex-Portland Cement (thin-set) Mortar Application – In this application, the mat or cable is already installed in the concrete slab.
The primary concern is proper installation of the cement mortar bond coat (thin-set) and tile according to Tile Council of North America (TCNA) recommendations for exterior applications (F102-07).
Mortar and grout materials should comply with American National Standards Institute (ANSI) standards for exterior applications.
2) Cement Mortar or Thick-set Application – In this application, the mat or cable is installed above the structural slab in a thick mortar bed and bond coat according to TCNA F101.07.
A minimum 1.25-inch mortar bed should be placed over the cable or mat according to ANSI A108.1A guidelines.
Above this layer, the mortar bond coat and tile are installed.
STEP 4.6
Use a digital multi-meter to measure the resistance between the conductors of the mat/cable power leads again.
Record these resistances in Table 3 under “After coverings are applied”.
Phase 5: Controls and Sensors
Refer to Typical Wiring Diagrams page above
STEP 5.1
De-energize all circuits feeding this system before performing any electrical work.
STEP 5.2
If a slab sensor is being installed, uncover the cap or seal on the embedded sensor socket.
Feed the sensor leads through the conduit up to the control.
Secure the sensor into the socket and complete installation according to the sensor manufacturer instructions.
STEP 5.3
Make wire connections at junction boxes for the ProMelt Mat/Cable power leads to the power wiring from the control.
If the junction box is located outdoors, it is highly recommended to use wet-location rated wire nuts or crimps to help prevent corrosion.
STEP 5.4
Install the control according to the instructions provided with the control.
Make wiring connections to the power source, sensor wires, and mat/cable lead wires.
CAUTION: The ground wire supplied with the mat/cable must be connected to a suitable grounding/earthing terminal.
STEP 5.5
After careful inspection of all wiring, connect the power supply wiring to the GFCI-type circuit breaker and turn it on.
STEP 5.6
Follow the control instructions for system setup.
The sensor should not allow the system to energize until proper snow melting conditions exist.
The control may allow temporary testing for a few minutes.
If you have a clamp-on electrical test meter, briefly energize the system and verify the mat/cable is drawing the proper level of current as planned.
Do not fully energize the ProMelt system, except for brief testing, until the concrete is fully cured or asphalt is completely cooled.
This could otherwise cause improper curing of the surface materials.
CAUTION: Do not operate the system with air temperatures above 50°F (10°C) except for brief testing.
This may stress the materials, reduce heating cable life, and potentially damage the surface materials and heating cable.
Troubleshooting Guide
| Problem | Possible Cause | Solution |
|---|---|---|
| Mat/cable resistance measurement is outside the range printed on the nameplate label. | An analog ohmmeter was used to take the reading. | Use a digital ohmmeter (multi-meter) capable of reading 0 to 20,000 ohms (Ω) and re-measure resistance. |
| Heating cable has been damaged causing an open or short circuit. | Record resistance measurements between all power lead wires and contact the manufacturer. | |
| Room temperature affected the resistance reading. | Place the mat/cable in a room between 65°F and 75°F and re-measure after one hour. | |
| Measurement includes more than one mat/cable. | Disconnect all mats/cables from each other and from controls before re-measuring. | |
| Ohmmeter is set to the wrong measurement range. | Set the meter range correctly (example: 200Ω) and re-measure. | |
| Snow or ice is not melting. | Heating mat/cable has been damaged. | Measure resistance between all power lead wires. If open or short-circuit damage exists, contact the manufacturer. |
| GFCI has tripped. | Reset the GFCI once only. If it trips again, inspect wiring and test mat/cable resistance. | |
| Incorrect voltage applied. | Measure voltage between power lead wires and verify all controls and cables match voltage ratings. | |
| Mats/cables connected in series. | Multiple mats/cables must be connected in parallel. | |
| System operates continuously. | Incorrect wiring or bypassed control. | Inspect wiring connections and verify proper control installation. |
| Faulty control relay. | Refer to control instructions and troubleshooting information. |
Appendix: Typical Wiring Diagrams
Following are examples of common wiring connections for ProMelt systems.
Carefully read and follow all instructions provided with each control.
All electrical work must be performed by qualified personnel in accordance with local codes, ANSI/NFPA 70 (NEC Article 426), and Section 62 of the Canadian Electrical Code Part 1.
Helpful Resources:
- SunTouch How-To Videos
- SunTouch ProMelt Installation and Specifications
- SunTouch ProMelt Installation Manual
- EMF - Electromagnetic Fields Information
Shop Related Collections:
- Shop All SunTouch Snow Melting Systems
- Shop SunTouch ProMelt Snow Melting Mats
- Shop SunTouch ProMelt Snow Melting Cables
Enjoy your new SunTouch ProMelt Snow Melting System!
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