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Installation shutdown, Antifreeze protection, 4 installation shutdown – DE DIETRICH AFC 18 - AFC 24 - AFC 30 User Manual

Page 24: 5 antifreeze protection

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User level - Menu #TIME PROGRAM

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Comfort periods / Filling enabled:
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P2 _______________ P3 _______________ P4 _______________

TIME PROG.DHW

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TIME PROG.AUX

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4.4

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

Switch off the boiler electrical power supply.

4

Close the oil inlet.

4

Ensure that the boiler and system are protected against frost

damage.

4

The boiler and the chimney must be swept carefully.

4

Close the door of the boiler to prevent the internal circulation of

air.

4

Remove the pipe connecting the boiler to the chimney and plug

the nozzle.

4

Drain the domestic water tank and pipes (For models with

domestic hot water production).

4.5

Antifreeze protection

When the heating water temperature in the boiler is too low, the

integrated boiler protection system 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.

4

If the water temperature in the storage tank is less than 4°C, it is

reheated to its set point.

4. Operating the appliance

AFC 18 - AFC 24 - AFC 30

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09/01/2014 - 300026440-001-03