Assortment / System Description

Control function
Room controller and setpoints
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11.4.2 Temperature control: Direct or cascading
DXR2 applications support two forms of temperature control: Direct
temperature control and room supply air cascade.
On direct room temperature control the room controller directly calculates the
output signal (0...100%) for the aggregates from the measured room
temperature.
Room supply air cascade quickly achieves the room temperature setpoint. The
room controller calculates a setpoint from the room temperature as measured
at the air outlet of the air system. The temperature can be limited to prevent
the inflow of unpleasantly cool or warm air into the room.
Figure: Plant diagram for supply air cascade control
Direct temperature
control
Room supply air
cascade