DE DIETRICH WHE 2.24, WHE 2.24 FF-3S, WHE 2.28 FF - Manual (Page 8)

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WHE 2.24 / WHE 2.24 FF-3S / WHE 2.28 FF 22/07/2008 - 300017625-001-B
4.3 Stopping the boiler
4.3.1 Switching off
Set the On/Off switch to
{
. A boiler which is switched off is not protected against frost.
The control panel should always be switched on to take
advantage of the heating pump anti-sticking function
4.3.2 Antifreeze protection
Leave the boiler on standby:
- Turn the boiler thermostat to Min.
- Turn the domestic hot water thermostat to Min. The pumps start up when the temperature falls below 8°C.
The pumps and the burner start up when the temperature falls below
6°C.
4.3.3 Cleaning the pumps
Leave the boiler on standby:
- Turn the boiler thermostat to Min.
- Turn the domestic hot water thermostat to Min. The pumps operate for 5 seconds if they have been inactive for more
than 24 hours.
4.3.4 Precautions to take if there is a danger of frost
Heating circuit:
Use a correctly dosed antifreeze to prevent the heating water
freezing. If this cannot be done, drain the system completely. In all
cases, consult the fitter. Domestic hot water circuit:
Drain the domestic water tank and pipes.
4.3.5 Precautions to take in the event of prolonged shutdown (one year or more)
- Close the gas valve
- The boiler and the chimney must be swept carefully.
- Close the door of the boiler to prevent the internal circulation of air.