Installation Shut-Down; Frost Protection - DeDietrich ALEZIO O HYBRID User Manual

5.14

Installation shut-down

5.15

Frost Protection

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Caution
Certain parts of the indoor module continue to be under power
once the electricity to the boiler has been cut. Switch off the mains
electricity to the hybrid heat pump on the principal junction board.
If the central heating system is not used for a long period, we recommend
that the heat pump be switched off.
1. Switch off the mains supply to the boiler.
2. Cut off the mains electricity to the indoor module.
3. Cut off the mains electricity to the outdoor unit.
4. Close the oil inlet.
5. Have the boiler and the chimney carefully swept.
6. Close the door of the boiler to prevent air circulating inside it.
7. Remove the pipe connecting the boiler to the chimney and plug the
flue gas nozzle.
8. Keep the area frost-free.
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 5°C, the circulating pump starts
up.
If the water temperature is lower than 3°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.
5 Operation
200 ESL HYBRID 41