Assortment / System Description

Heat pump application
Room supply air cascade
20
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20.26 Room supply air cascade
The heat pump application does not support the room-supply air cascade.
20.27 Air quality control
The heat pump application can be used for air quality control. It requires an
outside air damper capable of supplying the room with fresh air and an air
quality sensor in the room. The application automatically enabled air quality
control as soon as an air quality sensor and an outside damper is configured.
Air quality setpoints can be configured separately for each room operating
mode.
Description Name Default value
Room air quality setpoint for Comfort SpAQualRCmf 900 ppm
Room air quality setpoint for Pre-Comfort SpAQualRPcf 1100 ppm
Room air quality setpoint for Economy SpAQualREco 1500 ppm
Room air quality setpoint for Protection SpAQualRPrt 1500 ppm
The minimum outside air damper position can also be configured for each room
operating mode.
Description Name Default value
Minimum outside air damper position for Comfort DmpOaPosMinCmf 50 [%]
Minimum outside air damper position for Pre-
Comfort
DmpOaPosMinPcf 40 [%]
Minimum outside air damper position for Economy DmpOaPosMinEco 30 [%]
Minimum outside damper position Protection DmpOaPosMinPrt 20 [%]
20.28 Dehumidification control
The application function for heat pump applications lowers the relative
humidity by overriding the heat pump cooling position and setting the fan to the
correct speed for dehumidification. The integrated PID controller compares
relative room humidity with the setpoint corresponding to the active room
operating mode. The PID controller operating mode is set to 2-point
(off/dehumidification) to activate maximum output if the temperature for
dehumidification must be lowered.
The heating pump cooling is controlled with the command to dehumidify, while
also coordinating that state with the controller that the cooling coils are ready
for dehumidification.
A humidity sensor in the room is required for dehumidification control. The
application automatically enables dehumidification control as soon as an
humidity sensor and heat pump are configured.
Setpoints
Minimum positions
for outside air damper