The volume air flow must be available if room temperature measurement is made using a return air sensor in the FPB system, to correctly acquire the actual room temperature. A minimum air volume is enabled in the dead zone by default for the operating mode Comfort on the DXR2. The parameter cannot be changed when using a return air sensor to measure room temperature.
In this case, note that a conventional room temperature sensor must be configured at the DXR2 input. The return air temperature sensor is then connected instead of the room temperature sensor. The room is now temperature controlled per the measured value from the return air sensor.
DXR2 does not support interval-type air volume activities to periodically measure room temperature with the return air sensor.
Also note that DXR2 temperature control in the room can only have one measured return (temperature sensor) which is always configured and connected at the input of the room temperature sensor. The available configuration for a return air sensor is used for visualization on DXR2.