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 a humidity sensor and heat pump are configured.
Setpoints
Dehumidification setpoints can be configured separately for each room operating mode.
Description | Name | Default value |
|---|---|---|
Relative room humidity setpoint for comfort | SpHuRelRCmf | 60 % r.h. |
Relative room humidity setpoint for pre-comfort | SpHuRelRPcf | 60 % r.h. |
Relative room humidity setpoint for economy | SpHuRelREco | 70 % r.h. |
Relative room humidity setpoint for protection | SpHuRelRPrt | 70 % r.h. |
Room temperature
based availability
Availability in deviation of the heating setpoint/room temperature can be configured to avoid too much cool down caused by dehumidification.
Description | Name | Default value |
|---|---|---|
Maximum deviation heating for dehumidification | HDvnMaxDhu | 3 [K] |
Hysteresis for max. deviation heating for dehumidification | HysHDvnMaxDhu | 1 [K] |