Instructions / Assembly

Testing the System

Each and every Warmup heating mat 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 mat upon receipt (in box)

• Test mat after layout (take pictures)

• Test mat after thin set or leveler and tile

installation

• Test mat after grouting

Complete a simple visual inspection of the heaters 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 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 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.

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 particular number of ohms between these wires, your

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

Call Warmup for further details on testing methods.