Assortment / System Description

Heat pump application
Outside air damper control
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The characteristic curve for the outside air damper can be limited by the
outside temperature. The value can be adapted regardless of internal room
load.
Description Name Default value
Output limitation characteristic curve for outside
temperature X1
X1LmOutTOa 6 [°C]
Output limitation characteristic curve for damper
position Y1
Y1LmOutDmpPos 20 [%]
Output limitation characteristic curve for outside
temperature X1
X2LmOutTOa 18 [°C]
Output limitation characteristic curve for damper
position Y2
Y2LmOutDmpPos 100 [%]
The Economizer function can be activated if the outside air is cold enough for
cooling. The temperature of the outside air is distributed via the weather
station central function to all rooms or measured locally. The switch-on point
for the Economizer can be defined by a parameter:
Description Name Default value
Minimum difference room temperature/outside
temperature for cooling
DiffTRTOaMinC 0 [K]
The Economizer is disabled and the outside damper is moved to the minimum
position if dehumidification uses the application. This dehumidifies more humid
air from the zone through the coiling coils.
In the event a mixed air temperature sensor is configured, the mixed air
temperature is controlled for room cooling to the mixed air temperature
setpoint. The mixed air temperature setpoint can be defined by a parameter.
Description Name Default value
Mixed air temperature setpoint for cooling SpTMxC 12 [°C]
The outside damper switch-on delay can be configured for fresh air demand
and cooling demand.
Description Name Default value
Cooling request switch-on delay DlyOnAirFlCReq 30 [s]
Ventilation request cooling delay DlyOnAflVntReq 30 [s]
Outside temperature-
dependent limitation of
outside air damper
Economizer
Mixed air temperature
control
Switch-on delay