181
COMMISSIONING
ENGLISH
Reset of the thermal protection of the electrical heater
The thermal protection of the electrical heater is an additional safeguard protecting the device in
the following cases:
• The electrical relay, which turns on the electrical flow heater can be permanently
short-circuited.
• At commissioning, air is in the system; this causes heating without heat extraction.
The easiest way to determine whether the thermal protection of the electrical heater is operative
is to force the Backup heater to work using the Emergency mode (refer to the Owner’s manual
for more detail).
Determine if you can feel by hand the difference between the supply line and the return line. The
electrical heater works if the supply line is warmer.
In case the electrical heater does not work because of one of the aforementioned reasons, the
Safety thermostat has to be reset manually after the problem is resolved.
First you have to remove the front panel. Reset the safety thermostat by pressing the red button
until you hear a “CLICK”.
CAUTION
!
Resetting the device can only be performed by installers, authorized contractors for
commission or authorized maintenance worker in a voltage-free state.
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