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5.4
Frost protection
Tab.13
Water tem
Operating description
perature
< 7 °C
The circulating pump starts up and shuts down if the water temperature is higher than 10 °C. The circulating
pump continues to run for a short time.
< 4°C
The boiler starts up and shuts down if the water temperature is higher than 35 °C.
7740500 - v02 - 12022021
For more information, see
Selecting the operating mode, page 20
Periods of absence or going on holiday, page 24
Caution
The frost protection function does not work if the boiler is powered
off.
Caution
The integrated protection system only protects the boiler, not the
heating system.
Caution
Have the boiler and heating system drained by a qualified
professional if the home is left empty for a long period of time and
there is a chance of frost.
Important
To prevent the radiators and the installation from freezing in
places where that risk exists (e.g. in a garage or an equipment
room), we recommend connecting an outdoor temperature sensor
to the boiler.
If the temperature of the water in the boiler falls too much, the integrated
protection device switches itself on. This device functions as follows:
5 Operation
CFU
19
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