User Manual

Table Of Contents
Control concept
Desigo room automation
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CM110664en_07 101 | 351
The HVAC control application in the room consists of two parts:
Application function for user requirements
Application function for HVAC plant control
The HVAC plant control contains a control module (CFC) that implements the control functions associated
with the HVAC device.
Control concepts
The physical room conditions are controlled by a combination of control methods (setpoints by operating
mode).
Sequence control
Algorithms for room temperature sequence control operate the heating and cooling equipment within
applicable limits. The algorithm for one single heating element is as follows (e.g., radiator):
Below is an illustration of the temperature control sequence for a more complex HVAC plant in the room.
The charts show the segregation of heating and cooling control sequences and associated setpoints and
sequencing of heat convection by fan air flow or associated switching stages.
HVAC Plant Control
T
Supply Chain
Functions
User Request
Room Coordination
WndCont
PscDet