Plant diagram

Figure: Example for a heating/cooling application with changeover valves

Key:

DXR2…

Automation station

 

R1

Room operator unit

YH

Heated beam valve

 

D1

Presence

YA

Changeover valve heating

 

D2

Window contact

YC

Chilled beam valve

 

CdnMon

Condensation monitor

YB

Changeover valve cooling

 

 

 

Sequences

Y

Output signal

 

TR

Room temperature

SpH

Effective heating setpoint

 

SpC

Effective cooling setpoint

YH

Heating valve

 

YC

Cooling valve

YA

Changeover valve heating

 

YB

Changeover valve cooling

Figure: Modulating heating and cooling sequence