WarmlyYours Snow Melting & Slab Heating - Manual (Page 5)

4.3 PRE-INSTALLATION PREPARATIONS
1. Review the custom installation plan for the area requiring the Heating System
and verify dimensions listed against your actual field dimensions to ensure they
match.
2. Confirm the location of the power supply box/Thermostat and sensor against the
plan.
3. Select Heating Cable(s) and ensure that the procured Cable is correct according
to the requirements in the following section.
4. Check the Slab Heating Cable in the box visually and make sure that it is not
damaged. Check voltage, wattage, resistance values from the factory test record
and verify that they match the required specifications.
5. Check resistance of Heating Cable and its insulation resistance with a multimeter/
megohmmeter as soon as it is removed from its packing. Resistance value of
the Heating Cable shall match to the value shown in Appendix A on page 12. A
tolerance of -5% to +10% is allowed. Insulation resistance shall be more than 10
Megohms. Record it on the warranty card located on page 22 of this manual.
6. The Heating Cable is now ready for installation.
4.4 INSTALLATION FOR INDOOR CONCRETE SLAB APPLICATION
1. Reinforcement mesh on the floor or slab should be strong enough when walked
on for installation of the Heating Cable.
2. Reinforcement mesh should be properly positioned and supported so that it does
not get disturbed during the concrete pour. Ensure the Heating Cable is on the
reinforcement mesh a minimum of 2” (51mm) below the finished concrete/slab
surface.
3. Surface preparation of the floor is very important. The floor must be completely
free of all debris including all nails, sharp metallic objects, wood and construction
debris. Make absolutely sure that there are no objects on the floor that might
damage the Heating Cable.
4. Start installing Heating Cable from the location of power connection box.
5. Roll out the Heating Cable. Secure it to the reinforcement mesh or grid using
plastic zip ties (supplied by installer).
6. Heating Cable should be laid 3” (76mm) away from the wall perimeter.
7. Heating Cable should be laid so that the Cables are equally spaced. The distance
between two Heating Cable passes should be according to the spacing calculation
determined by WarmlyYours. No heating cable shall be covered by any surface-
mounted equipment.
8. Route the power leads through a conduit from the floor to the connection box. If
multiple cables are being used, route all power leads through a conduit from the
floor to the connection box in the wall.
9. Check the resistance and insulation resistance value after laying out Cables.
Check to see if these values are consistent with the pre-install values. Record
values in the warranty card on page 22.
10. At this point, the concrete can be poured.
11. Pour the concrete and spread evenly on the reinforcement mesh / grid. The
concrete floor or slab thickness shall be about 2” (51 mm) on top of the Heating
Cable.
12. Ensure the entire Heating Cable, factory splices and thermostat sensor (in
metal conduit) are embedded in the cement mortar. The choice and application
of building materials should be in accordance with the building material
manufacturer’s instructions.
13. Ensure the correct curing time for drying of construction materials is followed
before powering ON the Heating Cables.
14. Check the continuity, resistance and insulation resistance values after the
concrete or mortar is poured. They should be consistent with the values recorded
previously. Record values on the warranty card on page 22 of this manual.
WARNING
The heated cable spacing is mandated to generate a maximum of
15Watts/ft2 (161Watts/m2) of output in applications where a floor covering, such as
carpet, tile, or wood, is placed over the slab.
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