Shutting Down The Heat Pump; Frost Protection - DeDietrich ALEZIO S User Manual

5 Operation
5.11

Frost protection

32 AWHP MIV-S
5.10.2

Shutting down the heat pump

The heat pump must be shut down in certain situations, for example
during any intervention on the equipment. In other situations, such as an
extended absence period, we recommend that the System holiday mode
operating mode is used in order to benefit from the heat pump anti-
blocking function and to protect the installation from frost.
To shut down the heat pump:
1. Switch off the outdoor unit and the indoor unit.
If the temperature of the heating water in the heat pump falls too much,
the integrated protection device switches itself on. This device functions as
follows:
If the water temperature is lower than 8 °C, the circulating pump starts
up.
If the water temperature is lower than 6 °C, the back-up starts up.
If the water temperature is higher than 10°C, the back-up shuts down
and the circulating pump continues to run for a short time.
The radiator valves in rooms where there is a risk of frost must be fully
open.
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