Assortment / System Description

Fan coil
application
Water register for 4-pipe system with changeover valves
17
100 | 275 A6V10866237_en--_b_08
17.7 Water register for 4-pipe system with
changeover valves
Figure: Example of water register 4-pipe system with changeover valves
Key:
DXR2… Room automation station R1 Room operator unit
YH Heating valve D1 Presence
YA Changeover valve heating D2 Window contact
YC Cooling valve Q1 Fan
YB Changeover valve cooling
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
Plant diagram
Sequences