ABB RTC-F-1.PB Technical Manual page 22

ABB-free@home
Off mode
Application: The is not being used for a longer period of time.
Behaviour of the RTC: The display indicates "OFF". The heating valves are
closed (frost protection is active).
Antifreeze mode
Application: Switches on automatically when a window contact has been con-
nected and the window is being opened.
Behaviour of the RTC: The display indicates antifreeze. The heating valves close.
If the room temperature drops below 7°C, the heating is switched on again to
prevent damage to the building.
Heating/cooling switchover
The room temperature controller is suitable both for heating and cooling opera-
tion. The switchover of the two modes is made via a binary input which has been
configured as heating/cooling reverser and is connected with the room tempera-
ture controller in the user interface.
Technical Manual 1473-1-8574
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Operation
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