SiUS371901E
Basic Control
Functions and Control
116
5.6
Heat Exchanger Control
While in heating or cool/heat simultaneous operation, ensure target condensing and evaporating
temperature by changing over the air heat exchange of outdoor unit to the evaporator or the
condenser in response to loads.
Single system
Multi outdoor unit system
Outdoor unit
Lower side
Condenser
Upper side
Condenser
Outdoor unit
Lower side
Evaporator
Upper side
Condenser
Outdoor unit
Lower side
Evaporator
Upper side
Evaporator
Outdoor unit
Lower side
—
Upper side
Condenser
CL decrease
HL increase
CL decrease
HL increase
CL increase
HL decrease
CL decrease
HL increase
CL increase
HL decrease
CL increase
HL decrease
1
3
1
3
1
3
1
3
1
2
2
2
2
2
3
1
2
3
1
2
3
1
2
3
Lower side Upper side
Outdoor unit
Lower side Upper side
Lower side Upper side
Condenser Condenser
Condenser Condenser
—
Condenser
Lower side Upper side
Outdoor unit
Lower side Upper side
Lower side Upper side
—
Condenser
Condenser Condenser
—
Condenser
Lower side Upper side
Outdoor unit
Lower side Upper side
Lower side Upper side
—
Condenser
—
Condenser
—
Condenser
Lower side Upper side
Outdoor unit
Lower side Upper side
Lower side Upper side
—
Condenser
—
Condenser
—
—
CL decrease
HL increase
CL increase
HL decrease
Lower side Upper side
Outdoor unit
Lower side Upper side
Lower side Upper side
—
—
Evaporator Condenser
—
—
Lower side Upper side
Outdoor unit
Lower side Upper side
Lower side Upper side
—
—
Evaporator Evaporator
—
—
CL decrease
HL increase
CL increase
HL decrease
CL decrease
HL increase
CL increase
HL decrease
Lower side Upper side
Outdoor unit
Lower side Upper side
Lower side Upper side
Evaporator Evaporator
Evaporator Evaporator
—
—
Lower side Upper side
Outdoor unit
Lower side Upper side
Lower side Upper side
Evaporator Evaporator
Evaporator Evaporator
Evaporator Evaporator
CL decrease
HL increase
CL increase
HL decrease
CL decrease
HL increase
CL increase
HL decrease
<Symbol meanings>
CL: Cooling Load
HL: Heating Load
CL
decrease
HL
increase
CL
increase
HL
decrease
CL decrease
HL increase
CL increase
HL decrease
Summary of Contents for REYQ-XA
Page 1: ...Service Manual SiUS371901E REYQ72 456XATJU REYQ72 456XAYDU REYQ72 432XAYCU Heat Recovery 60 Hz...
Page 415: ...SiUS371901E Wiring Diagrams Appendix 402 REYQ144 168XATJU 2D119206A...
Page 416: ...Wiring Diagrams SiUS371901E 403 Appendix REYQ72 96 120XAYDU 2D119207B...
Page 417: ...SiUS371901E Wiring Diagrams Appendix 404 REYQ144 168XAYDU 2D119208B...
Page 418: ...Wiring Diagrams SiUS371901E 405 Appendix REYQ72 96 120 144 168XAYCU 2D119209A...
Page 421: ...SiUS371901E Wiring Diagrams Appendix 408 FXZQ05 07 09 12 15 18TAVJU 3D110443A...
Page 423: ...SiUS371901E Wiring Diagrams Appendix 410 FXEQ07 09 12 15 18 24PVJU 3D098557A...
Page 425: ...SiUS371901E Wiring Diagrams Appendix 412 FXSQ05 07 09 12 15 18 24 30 36 48 54TAVJU C 3D110467C...
Page 426: ...Wiring Diagrams SiUS371901E 413 Appendix FXMQ07 09 12 15 18 24 30 36 48 54PBVJU 3D093209B...
Page 428: ...Wiring Diagrams SiUS371901E 415 Appendix FXHQ12 24 36MVJU 3D048116C...
Page 429: ...SiUS371901E Wiring Diagrams Appendix 416 FXAQ07 09 12 18 24PVJU C 3D075354D...
Page 435: ...SiUS371901E Wiring Diagrams Appendix 422 VAM1200GVJU 3D073270D...
Page 437: ...SiUS371901E Wiring Diagrams Appendix 424 1 4 2 Multi Branch Selector Unit BS4Q54TVJ 3D089123B...
Page 438: ...Wiring Diagrams SiUS371901E 425 Appendix BS6 8Q54TVJ 2D089122B...
Page 439: ...SiUS371901E Wiring Diagrams Appendix 426 BS10 12Q54TVJ 2D089121B...
Page 440: ...Revision History Month Year Version Revised contents 04 2019 SiUS371901E First edition...