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STEPS TO FOLLOW
STEP 1
1.1 Determine the location of the thermostat
The expanded electrical box must be installed in an accessible area within the room where the system
will be installed. The connection to the box will be done via the cable's cold lead extremity. Part of this
cable will run inside the wall to complete the connection to the thermostat. The cold lead cable is flat
and black and is connected to the heated portion of the cable by a mechanical joint. Since the joint's
diameter is bigger than the heating cable's, it will be inserted, if needed, in a groove in the membrane
or subfloor when installed with gauges in order to avoid unevenness when the floor covering is installed.
1.2 Make sure the installation surface is smooth and clean
The surface must be flat, smooth and free of protruding nails, screws or other objects that could damage
the cable. The subfloor used must be compatible with the mortar or the self-levelling underlayment.
1.3 Verify the measurements of the area to be covered
Measure the surface area of the room where the cable will be installed. It is important to verify the label
on the box of your True Comfort cable as it provides information on the surface covered by the cable.
The surface that the cable can cover must always be equal or inferior to the total surface of the room
that will be heated. The cable must not be cut or modified in any way.
IMPORTANT: Never connect a cable while it is on the spool. To test the cable, follow the "Test the cable's
integrity" procedure.
1.4 Test the cable's integrity
Before removing the cable integrity seal (the clear plastic seal around the heating cable's spool), it is
important to verify that the cable conforms to specifications. This test must be repeated after the cable
is installed and once more once the cable has been covered by the mortar or self-leveler.
This procedure entails:
Verification of the resistance
Using an appropriate multimeter, test the resistance between the black wires.
The result should be within ± 10% of the reference value on the product label.
The cable's resistance was established in an environment at 20 °C (68 °F). If the
difference is greater than that, please contact True Comfort Customer Service
toll-free at 1 877 800-8783.
Verification of the insulation
Using a megohmmeter, connect one of the device's cables to the ground
cable (green cable) and the other cable to one of the black heating elements.
Apply a voltage of 1,000 V. If the read-out is greater than 500 MΩ, the cable is
sound. If that is not the case, please contact True Comfort Customer Service
toll-free at 1 877 800-8783.
Although less precise, this test can also be performed with an appropriate
multimeter. Adjust the multimeter to the resistance function (Ω) and verify that
there is an infinite resistance between one of the black cables and the green
cable. If you get a reading other than infinity (make sure your fingers do not
touch the exposed part of the multimeter's cables or sensors), it is possible the
cable is damaged. Contact True Comfort customer service to register the results
and request a repair.
True Comfort strongly recommends that the insulation test be performed with a megohmmeter. The
greater accuracy will allow you to detect certain damages that would not be detected with a multimeter.
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