Assortment / System Description

Heat pump application
2-stage heat pump with reversing valve control and hot gas reheater
20
176 | 275 A6V10866237_en--_b_08
20.9 2-stage heat pump with reversing valve control
and hot gas reheater
Figure: 2-stage heat pump with reversing valve control and hot gas
reheater
Key:
DXR2… Automation Station Q1 Fan
D1 Presence R1 Room operator unit
D2 Window contact YR Electric reheater
HP Heat pump
Y Output signal heat pump TR Room temperature
SpH Effective heating setpoint SpC Effective cooling setpoint
YH Heat pump heating YC Heat pump cooling
YH1 Heat pump heating 1 stage YC1 Heat pump cooling 1 stage
YH2 Heat pump heating 2 stage YC2 Heat pump cooling 2 stage
YRV Reversing valve heat pump
Figure: 2-stage heating and cooling sequence with reversing valve
Plant diagram
Sequences