User Manual

Table Of Contents
Control concept
Desigo room automation
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Operating modes
The HVAC plants in the room adapt to the room's comfort requirements, e.g., ventilation is:
Active while the room is occupied
Off, as soon as the room no longer is occupied
The following illustrations show sequence control for an HVAC plant in the room for operating modes
Comfort and Economy. Sequence control acts on heating and cooling equipment and a multi-speed fan.
Control sequences in the Comfort operating mode:
Control sequences in the Economy operating mode:
Max
FanSpdMin
C1H1H2 C2
AND
AND
FanSpd HclVlvPos CclVlvPos
FanSpdMaxC
FanSpdMinC
FanSpdMaxH
FanSpdMinH
AirFlReqHeat
FanDevMod=Mod
HclDevMod=Mod CclDevMod=Mod
AirFlReqCool
Room temperature
control
Neither CoolingHeating
HCSta
SpH SpC
TREff
Cool 1Heat 1 Cool 2Heat 2
AirFlReqHeat
100%
0%
TREff
FanSpd
VlvPos
Plant operating mode Comfort
VlvPos
CclChw01HclHw01
FanMultiSpd01
Speed 3
FanSpdMin=Off
Speed 2
Speed 1
AirFlReqCool