Plant diagram

Figure: Example for 4-pipe system VAV applications with a 6-port valve

Key:

DXR2…

Automation station

 

R1

Room operator unit

YHC

6-port valve

 

D1

Presence

 

 

 

D2

Window contact

Sequences

 

Y

Control signal/rotational angle

 

X

Valve opening

Y2C

Cooling open

 

X2C

Cooling valve open

Y1C

Cooling begins

 

X1C

Cooling valve closed

Y1H

Heating begins

 

X1H

Heating valve closed

Y2H

Heating open

 

X2H

Heating valve open

Figure: Modulating heating and cooling sequence with 6-port valve positions

Parameter settings

Description

Name

Default value

Cooling coil valve position for value X1C

X1CclVlvPos

0 [%]

Cooling coil valve position for value Y1C

Y1CclVlvPos

50 [%]

Cooling coil valve position for value X2C

X2CclVlvPos

100 [%]

Cooling coil valve position for value Y2C

Y2CclVlvPos

0 [%]

Heating coil valve position for value X1H

X1HclVlvPos

0 [%]

Heating coil valve position for value Y1H

Y1HclVlvPos

50 [%]

Heating coil valve position for value X2H

X2HclVlvPos

100 [%]

Heating coil valve position for value Y2H

Y2HclVlvPos

100 [%]