12
The electrical contactor which turns on the electrical flow heater can be
permanently short-circuited.
At commission, air is in the system, which causes heating without heat extraction.
The easiest way to determine whether the thermal protection of the electrical heater is
turned off is to turn on the operation of the auxiliary source on the TERMOTRONIC control
unit. If the electric heater is operational, the water temperature in the heating system will
start to rise.
In case the electrical heater does not work because of one of the before mentioned
reasons, the safety thermostat has to be reset after the problem is resolved. It is reset by
pushing the red button. If the reset is successful, you will hear a
“CLICK”.
Picture 2: Resetting the safety thermostat of the built -in electrical heater
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