6 Switching off the boiler
6.1
Installation shutdown
If the central heating system is not used for a long period, we
recommend switching the boiler off.
4
Switch the On/Off switch to Off.
4
Cut the power supply to the boiler.
4
Shut off the gas supply.
4
Ensure that the boiler and system are protected against frost
damage.
6.2
Frost protection
CAUTION
If the home is unoccupied for a long period and there is a
risk of frost, drain the boiler and the heating system.
4
Turn down the temperature of the room thermostat to, for example,
10 °C.
4
Set the boiler to ECO mode using parameter
p4
, this action will
switch off the standby setting.
¼
See chapter: "Changing the settings", page 64.
The boiler will then only start up to protect itself from frost. To prevent
radiators and the system from freezing in rooms where there is a risk
of frost (e.g. a garage or storage room), a frost thermostat or outside
sensor can be connected to the boiler.
¼
See paragraph: "Connect frost protection", page 43.
CAUTION
4
The antifreeze protection does not function if the
boiler is switched off.
4
The integrated protection system only protects the
boiler, not the installation.
When the heating water temperature in the boiler falls by too much,
the integrated protection system in the boiler starts up. This protection
functions as follows:
4
If the water temperature is lower than 7°C, the heating pump starts
up.
4
If the water temperature is lower than 4°C, the boiler starts up.
4
If the water temperature is higher than 10°C, the boiler shuts down
and the circulation pump continues to run for a short time.
Calenta 25s - 28c - 35s - 40c
6. Switching off the boiler
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