ABB i-bus KNX Product Manual page 33

The device has the following operating modes:
Display
Product manual 2CKA001473B9482
Operating mode
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. However, the room should not cool down
completely.
– Behaviour of the RTC: The display indicates "ECO". The temperature is lowered
by 2°C. The reduction can be adjusted in the user interface.
Off mode
– Application: The room 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).
Frost/heat protection
– Application: The function switches on automatically when a window contact has
been connected and the window is being opened.
– Behaviour of the RTC: The display indicates the icon for frost/heat protection.
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
– Application: The device is suitable for both heating and cooling mode. The
switchover of the two operating modes takes place either via a binary input,
which has been configured as heating/cooling reverser, or via a press of the
button [1] and subsequent selection via the set value adjustment buttons (2/3).
– Behaviour of the RTC: The device operates in heating mode. The display shows
the icon for heating. The settings for heating mode are available. The heating
unit, e.g. a heat pump, switches into cooling mode. All RTCs in the building
receive information via the KNX bus and switch from heating mode into cooling
mode. The display shows the icon for cooling. The settings for cooling mode are
available.
Fan operation
– Application: You want to change the automatically selected fan speed level and
set the desired fan speed level manually on the device. The control of the
temperature in the room continues to be active.
– Behaviour of the RTC: The display indicates the set fan speed level and "Auto".
The room is heated or cooled via a 3-stage fan coil. The fan sets the necessary
fan speed level automatically in dependence of the control.
Operation
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