ABB i-bus KNX Product Manual page 82


ABB i-bus KNX
Start-up
Important
If HEATING/COOLING = 1 or HEATING/COOLING = 0 (undefined operating condition), then the output
is only controlled by the automatic sun protection.
80 2CDC 506 051 D0204 | JRA/S
Use overheat control
Options: Yes
No
Overheat control prevents the heating up of a room during an absence. During the heating period,
rooms with large glass windows can heat up quickly in strong sunlight, even if the external
temperature is low. Overheat control is used to prevent this and save possible cooling energy.

Yes: The communication object Receive room temperature and the following parameters
appear:
Upper threshold value
room temperature in °C [21...50]
21...24...50
Options:
If the temperature value set here is reached or exceeded, then the blind/shutter moves to a
parameterizable position, e.g. DOWN. If the temperature value is undershot by minus 3
Kelvin, then overheat control is terminated. The blind/shutter is the moved to the
parameterized position, according to the values of the communication objects Heating and
Sun.
Position at upper threshold value
and sun = 1
Options: Down
Position 1...4
Individual position
The blind/shutter moves to the position input here as soon as the specified threshold value
has been exceeded.

Down: If the upper room temperature threshold value is exceeded or if Sun = 1, the
blind/shutter will move down.

Position 1...4: If the upper room temperature threshold value is exceeded or if Sun = 1,
the blind/shutter will move to the position which can be set in the parameter window A:
Positions/presets, p. 72.

Individual position: A freely definable position can be set for when the upper room
temperature threshold value is exceeded or for when Sun = 1. The following parameters
appear:
Position height in % [0...100]
(0% = top; 100% = bottom)
Position slat in % [0...100]
(0% = open; 100% = closed)
Options: 0...100
These parameters specify the height or the slat position of the blind/shutter.