ProMelt Installation Manual

17
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. Follow building code requirements for required thicknesses.
CAUTION: Do not use sharp tools which could damage the ProMelt.
Blunted shovels should allow you to work the concrete carefully into
all areas.
• Make sure the heating cable is fully embedded as well as 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 to briefly test it, as this would improperly accelerate the
curing and potentially cause concrete damage.
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” aggregate or smaller. Larger aggregate can cut or pinch the cable.
Before applying, ensure the asphalt temperature is not greater than 285
⁰ F
(140°C). Good compaction of the asphalt requires a certain temperature
range of installation, depending on the type of asphalt being installed.
Manually lay the asphalt at the cable level. Do not apply with asphalt
machines as they may damage the 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 small power roller or compactor. Avoid using large power rollers which may compress
aggregate into the cable.. If possible, move the roller perpendicular with the cable direction to help avoid stress
on the cable below. Be careful not to stop or start the roller over the mats as this could cause the asphalt to shift,
potentially damaging the cables.
• Make sure the heating cable is fully embedded as well as 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 per the manufacturer.
STEP 4.4
Stone or Paver Application
Manually spread sand over the top of the cables and base so that no less than
1-1/2 inches covers the top of the heating cables. Do not install mat/cable
directly in sand or similar if this is an outdoor heating application. Be careful
not to use sharp tools.
Compact the sand as recommended by the paver supplier, being careful not to
uncover any of the ProMelt Mat/Cable and not to damage the conduits coming
into the area. Use hand compacting tools around the conduit area. Add more sand
if necessary to maintain minimum 1-1/2 inches over all of the cables and conduit.
• Make sure the heating cable is fully embedded as well as 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. The thicker the mass that ProMelt is embedded in, or the
deeper the cable is beneath the finish surface, the longer it will take to melt snow from a cold start. Thermal
masses thicker than 4" total thickness may have response times that are unacceptably long, and may need to use
control strategies that minimize the response time.
1-1/2" to 3" of concrete above ProMelt.
1-1/2" to 3" of asphalt above ProMelt.
Total concrete thickness at
least 4". Follow local code.
At least 1-1/2" of sand above ProMelt.