Damper control

The dampers receive their input signal from the control strategy module.
The damper transfers the strategy signal:


The output signal is limited by the minimum and maximum damper position defined by parameters DMS-01 and DMS-02.


During forced recirculation, the strategy signal will transmit a value of “-1”, which forces the mixing damper output macro to ignore its own minimum damper position.

In this case the outside and exhaust air dampers will close and the mixed air damper will open.


On receipt of the damper enable signal "DamperEnable"  from the heating coil macro, the  fan enable output "FanEnable" switches on after the delay defined by the parameter DMA-01.



Note: The damper control signal is the minimum value between the strategy control signal and the mixed air temperature control signal.


Description

Default value

DMS-01: Y-min  Pos. damper signal

20 %

DMS-02: Y-max  Pos. damper signal

100 %