→ ADDITIONAL HEATING
Freezing protection only
The electric immersion heater will be switched on only when heating water
temperature falls below 5 °C. The freezing protection function monitors the
temperature in the condenser, buffer tank, and the heating circuits. Once the
temperature exceeds 10 °C, the immersion heater will be switched off. In freezing
protection, space heating takes precedence over heating domestic hot water.
●
If this option is selected, the electric immersion heater won’t be switched
on during a fault, unless the temperature falls below the Freezing
protection limit.
Backup use only
The electric immersion heater will be switched on, if:
1. The outdoor temperature is below 5 °C (freezing protection).
2. An alarm prevents the compressor from starting (backup operation).
In backup use, space heating takes precedence over heating domestic hot water.
Select this option, if the fuse for the heat pump power supply is not rated for running
the compressor and the immersion heater in parallel.
Mode for heating:
operating mode
selection for space
heating
With compressor (parallel operation)
The electric immersion heater will be switched on, if:
1. The outdoor temperature is below 5 °C (freezing protection).
2. An alarm prevents the compressor from starting (backup operation).
3. The target temperature for flow water from the heat pump has not been
reached, and the start delay for the electric immersion heater has elapsed.
Select this option, if the fuse for the heat pump power supply is rated for running the
compressor and the immersion heater in parallel.
M8006 2123EN
35 (54)
