Mixed air temperature setpoint with outside air temp. compensation
The damper control signal is the minimum value between the strategy control signal and the mixed air temperature control sognal.
The mixed air temperature control depends on the presence of the mixed air temperature sensor " MixedAirTemp".
Mixed air temperature control with mixed air temperature sensor
The mixed air temperature setpoint is compensated by the outside air temperature between the values defined by parameters OAT-01 and OAT-02 and limited between the minimum and maximum setpoint values,
defined by parameters MAT-01 and MAT-02, as shown in the next figure. For display purposes, the calculated mixed air temperature setpoint is available as parameter DISP-01.
Note: If the parameter values of MAT-01 and MAT-02 are equal, then compensation does not occur.
The damper control signal is the output of a P controller with the mixed air temperature setpoint and sensor as inputs - as shown in the next figure.
If the mixed air temperature is equal to the mixed air temperature setpoint the control signal is 50%.
Mixed air temperature control without mixed air temperature sensor
If no mixed air temperature sensor is available, In this case the damper control signal varies according to the outside air temperature as shown in the next figure.
Note: To de-activate this function, set the maximum and the minimum outside air temperature (parameters OAT-01 and OAT-02) both to a value of -50 °C.
Description |
Default value |
MAT-01: min. mixed air temp setpiont |
10 °C |
MAT-02: max. mixed air temp setpiont |
10 °C |
OAT-01: min. limit outside air temp |
-10 °C |
OAT-02: max limit outside air temp |
10 °C |
MAT-03: P-band mixed air |
10 K |
DMS-01: Y-min. Pos damper signal |
20 % |
DMS-02: Y-max. Pos damper signal |
100 % |