20
ABB i-bus
®
EIB / KNX
In night setback mode:
Heating: Setpoint temperature = Base setpoint temperature – Reduced heating during
night s Setpoint adjustment
Cooling: Setpoint temperature = Base setpoint tempe Increased cooling during
night s Setpoint adjustment
In frost/heat protection mode:
Heating: Setpoint temperature = Threshold value for frost protection
Cooling: Setpoint temperature = Threshold value for heat protection
The setpoint temperature is restricted by the setpoint limit value.
The setpoint limit for heating defines the maximum temperature for heating
the room. The setpoint limit for cooling defines the minimum temperature for
cooling the room.
A correction of the temperature setpoint dependent on the external tempe-
rature is provided for comfort mode. This function automatically adapts the
setpoint temperature to the external temperature when cooling the room
and thus represents an additional restriction of the setpoint temperature.
The correction of the setpoint is set from the parameterised threshold value
of the external temperature (parameter:
Minimum external temperature for
correcting the setpoint
, parameter window “Setpoints 1”).
The setpoint value is adapted in proportion to the change in the external
temperature when this threshold value is exceeded: the setpoint value
increases by 1 °C with each 3 °C rise in the external temperature (see Fig. 11).
Fig. 11: Setpoint correction dependent on external temperature
3.4.3 Setpoint
correction
dependent on external
temperature
External temp.
Setpoint temp.
Setpoint
(without consideration
of external temp.)
Minimum external temperature for
correcting the setpoint
Setpoint
Application and planning
