Before installation, the resistance of each individual heating mat should first be measured with a multimeter and documented. For a functional test, the individual heating mats can also be connected directly to the 230V mains, i.e. without thermostats. As soon as the mats heat up, however, they should be disconnected from the mains again. Permanent operation without thermostats is not permitted and can damage the heating mats.
After each mat has been measured and tested individually, they can be laid out and wired. It should be noted that the heating mats may only be wired in parallel and not in series. Afterwards, the total resistance across all heating mats should be measured again with the multimeter. A final function test by applying the mains voltage again is advisable.