- 73 -
Operating Mode Changeover
Line Nr
Programming line
HC1
HC2
900
1200
Optg mode changeover
(None / Frost protection mode /
Reduced / Comfort / Automatic)
In case of an external changeover via input H2 (on the
extension module only) the operating mode to which
the changeover will be performed must be previously
defi ned.
Heating Circuit Frost Protection
The heating circuit frost protection is continuously
activated (protection mode ) and is not adjustable.
Heating circuit frost protection in heating mode
If the fl ow temperature is below 5 °C, the controller
initiates the production of heat and starts the heating
pumps, regardless of the current heating mode.
If the fl ow temperature rises again above 7 °C,
the controller waits another 5 minutes, and then stops
the production of heat and the heating pumps.
Heating circuit frost protection in cooling mode
See Cooling mode.
Waterstage / Maintenance Manual / 2105 - EN