Switching Off The Boiler; Installation Shutdown; Frost Protection - REMEHA Calenta 25s Installation And Service Manual

Calenta 25s - 28c - 35s - 40c
6

Switching off the boiler

6.1

Installation shutdown

6.2

Frost protection

040412 - 7600585-01
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.
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
The antifreeze protection does not function if the
4
boiler is switched off.
The integrated protection system only protects the
4
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.
6. Switching off the boiler
71