Assortment / System Description

VAV application
Active chilled beam 2-pipe system
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18.29 Active chilled beam 2-pipe system
Figure: 2-pipe system VAV applications, with active chilled beam
Key:
DXR2… Automation Station R1 Room operator unit
YS Supply air VAV D1 Presence
YC Chilled water cooling coils (active
chilled beam)
D2 Window contact
Y Output signal TR Room temperature
SpH Effective heating setpoint SpC Effective cooling setpoint
YC Cooling valve
Figure: Modulating cooling sequence
As a supplement to the condensation monitor, the primary chilled water
temperature is compared against the present dew point temperature in the
room. The chilled beam valve is closed if the chilled water temperature drops
below the dew point temperature at a configurable difference. The chilled beam
valve is once again released if the chilled water temperature exceeds the dew
point temperature, with consideration of a configurable difference and a dead
zone.
Plant diagram
Sequences
Dew point temperature
monitoring