Installation Guide

Each and every Warmup loose heating cable is subjected

to careful testing before it is shipped from the factory.

However, damage does sometimes occur in storage or

transit, and sometimes during installation. We strongly

recommend you test your heaters:

After unpacking them but before you install them,

and

After you have installed them but before you install the

floor covering (i.e. while the cables are still exposed),

and

After installation of the final floor covering.

Complete a simple visual inspection of the heating cable to make sure there is no visible damage.

A simple electrical inspection can be done with a digital ohmmeter to ensure the ohms

resistance is what it should be. The ohm resistance should be measured between the two

conductors without touching the yellow-green wire, which is the ground connection.

Checking for resistance between the two conductor wires ensures there is no break in the cold

lead conductor and the heat resistance wire. It does not assure you that there is no electrical

short in the circuit.

Place one probe on the black wire. Place the other probe on the yellow (red wire for 240V).

Resistance can vary significantly depending on the ambient temperature and an allowance of

+/- 5% from the norm is acceptable.

Ensure cable is fully insulated :

Test across the yellow-green wire (ground). Place the other probe on the yellow (red wire

for 240V).

Confirm the reading is infinity (open circuit).

Repeat these steps to check the reading between the yellow-green wire (ground) and the

black wire.

There should be no continuity between these wires and the ohms reading should be infinity

(not zero). If your meter shows a number of ohms between these wires, your heating cable

has an electrical short. Take note of the resistance and contact Warmup.

In order to conduct a more thorough test for insulation verification, Warmup recommends the

use of a megohmeter. Connect the instrument’s black cable to the system’s ground and the

red to the either one of the heating cable leads.

Note that depending on your meter model, you may read “kilo-Ohms” probably due to your

fingers touching the probes (it’s your body’s conductivity). If the readings are not satisfactory,

do not commence installation contact Warmup for further advice.

Testing the System