Frost Protection - Baxi PBS-i WH2 Series User Manual

5 Operation
5.4

Frost Protection

22 AWHP-2 PBS-i
For more information, see
Switching off the heating, page 21
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.
7706698 - v04 - 17102018