ABB -free home System Manual page 46

05 Types of Devices
Room temperature controller (Fig. 37)
The display of the room temperature controller always
indicates the set-value temperature. This can be changed
via the arrow keys of the control element.
The room temperature controller operates as PI controller
and in time adjusts its control value also to the response
of the room.
The room temperature controller has 4 operating modes
that can be adjusted locally:
Comfort operation
Application: You are in the room for a longer period of
time; the comfort temperature is to be reached.
Behaviour of the RTC: The display indicates the set-value
temperature that has been set. The controller aims at this
temperature.
Eco mode
Application: You are leaving the room for a few hours; the
room temperature is to be reduced to save energy; how-
ever, the room is not to cool down completely.
Behaviour of the RTC: The display indicates "ECO". The
temperature is reduced by 4°C (the reduction can be
adjusted in the user interface)
Off mode
Application: The room is not being used for a lengthy
period of time. Behaviour of RTC: The display indicates
"OFF". The heating valves are closed (antifreeze is ac-
tive).
Antifreeze mode
Application: Switches on automatically when a window
contact has been connected 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.
Fig. 37 Room temperature controller
A - Display of comfort mode heating
B - Display of comfort mode cooling
C - Display of ECO mode
D - Display of OFF mode
E - Display of antifreeze mode
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Heating/cooling switchover
The room temperature controller is suitable both for heat-
ing and cooling operation. The switchover of the two
modes is made via a binary input which has been config-
ured as heating/cooling reverser and is connected with
the room temperature controller in the user interface.
Extension unit operation
The room temperature controller can be configured in the
device settings as extension unit. In this setting only the
temperature sensor of the main unit is evaluated, the
extension unit serves only for selecting the operating
mode, and the set-value temperature.
ABB-free@home
System Manual
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