De-dietrich WHE 2.24 _ WHE 2.24 FF User Manual download pdf (Page 8)

WHE 2.24 / WHE 2.24 FF 17/07/2008 - 300011777-001-C

4. Operating the appliance

4.3 Stopping the boiler

4.3.1 Switching off

Set the On/Off switch to {.

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A boiler which is switched off is not protected against frost.

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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.

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De-dietrich WHE 2.24 _ WHE 2.24 FF User Manual Page 8