Install Instructions

5
ProMelt Mat/Cable may be used to heat an outdoor area, such as a patio. This application requires special installation
considerations and controls. Please see Step 1.6 for details.
Heating performance is never guaranteed. The amount of heat added to the area is dependent on many factors such
as air and ground temperature, wind speed, solar heat, moisture, etc. If you have any questions regarding expected
performance in your application, please contact the factory.
STEP 1.2
Make a drawing and measure the area where you want snow melting to occur. Eliminate those areas where
ProMelt cannot be installed, keeping in mind the following obstructions and allowances:
• For most applications, the base under the mat/cable must be a minimum of 2 inches of masonry, asphalt, or
similar material. The mat/cable must be completely covered by a minimum of 1-1/2 inches of material. (See
Phase 4 Finish Surfaces for more details.)
• For a deck or similar elevated application, the mat/cable must have a minimum of 1 inch of masonry below and
a minimum of 1 inch of material covering the entire mat/cable. (See Phase 4 Finish Surfaces for more details.)
• Mat/Cable cannot be laid within 6 inches of the edges of slabs. In asphalt, this is increased 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 (see Step
3.14).
• 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 between adjacent cables, but not more than 4 inches, between adjacent cables or
sections of a mat where the mat tape is cut and turned to fill the area.
• Mat/Cable must be laid such that the surface will not have other obstructions placed on top, capturing heat or
allowing potential damage from mounting brackets, bolts, or similar (pedestals, support columns, walls, light
posts, or similar)
Also, consider the following precautions:
WARNING: THE HEATING CABLE CANNOT BE CUT TO LENGTH. Order the correct size mat or cable to fit the
area. Modifying the heating cable is not allowed and may lead to overheating, damage, and fire hazard.
• The heating cable and factory splices of ProMelt Mat/Cable must be completely embedded in the concrete,
sand, or asphalt. Never try to use up excess heating cable in surrounding soil, walls, or other unprotected
applications.
• Never overlap the heating cable on itself or place heating cable closer than 2 inches from other heating cable.
• Only the power lead may exit this area. It will be pulled through conduit to protect it up to a junction box.
NEVER pull any of the heating cable or factory splices into any conduit.
STEP 1.3
Determine where junction box(es) may be placed to receive the ProMelt Mat/Cable power leads. This is important to
ensure the mat(s) and/or cable(s) you select fill the area correctly and with the best connection locations.
It is best to locate junction boxes on a wall indoors and within the distance of the power leads on the mat/cable. ProMelt
mat/cable comes standard with 20-foot long power leads, but may be custom ordered up to 50 feet long if necessary.
If a junction box must be located outdoors, it is recommended it be installed above grade and be properly Listed for
rain tight use outdoors. If it must be installed at or below grade, use properly Listed watertight items and follow box
manufacturer guidelines for protection and connection seals.
See typical installations on page 4.