Assortment / System Description

Room pressurization and fume hood control
Pressurized room, advanced temperature control
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21.8 Pressurized room, advanced temperature
control
The pressurized room with thermal power application is a separate application
type. Each application type can also combine a radiant/chilled ceiling or
radiator application. The image below provides an overview of the application
type with all possible components that can be configured for a pressurized
room with thermal power application.
The thermal power control function is a room temperature control algorithm
that includes a PID feedback controller and heat transfer calculations. It
controls the room temperature by adjusting the supply flow rate and supply
flow temperature. When the supply flow changes due to pressurization or
ventilation demands, this function adjusts the supply air temperature to
balance the heat flow to the room.
Figure: Application types for pressurized room, advanced temperature
control
Key:
DXR2… Automation station B4 Primary air temperature
B1 Return air temperature sensor R1 Room operator unit
B3 Supply air sensor D1 Presence
YC Chilled water cooling coils D2 Window contact
P Pressure sensor YS VAV supply air
YH Hot water heating coils or electric
heating coils
YE VAV extract air
Plant diagram