Assortment / System Description

Central applications
Automation station for HVAC supply and demand signals and manual control for lighting and blinds
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Central functions permit the central override of all valve in the supply group.
The following parameters can be used.
Description Name Default value
Enable valve position overridden value
0:No
1:Yes
EnVlvPosOvrr 0:No
Enable valve position overridden value VlvPosOvrr 100 [%]
24.1.5 HVAC supply chain air over BACnet
The following list includes all data points that can be read and written from a
BACnet primary plant. The items ensure coordination between primary plant
and the room. In addition, appropriate Desigo primary application for the given
room function is mentioned.
Data point name Description Desigo primary application
AhuDmd The evaluated demand signal
of the rooms to central air
handling
1:Off
2:Protection
3:Economy
4:Pre-Comfort
5:Comfort
6:Warm-up
7:Cool down
8:Room low temperature
protection
9:Condensation overflow
protection
10:Free cooling
11:Night cooling
12:Ventilation
13:Equipment temperature
protection
14:Air volume flow off
15:Smoke extraction positive
pressure
16:Smoke extraction negative
pressure
17:Purge
PXC {AHU80}
NumAirDmd Number of rooms with demand None
AQualDmd The evaluated air quality signal
of the rooms to central air
handling
PXC {AHU80}
SpHiTSu Setpoint high for supply air
temperature
PXC {AHU80}
SpLoTSu Setpoint low for supply air
temperature
PXC {AHU80}
Centrally override
valves