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SiUS39-602
Basic Control
Function
45
2.3
Electronic Expansion Valve PI Control
Main Motorized Valve EV1 Control, Sub Motorized Valve EV2 Control
Carries out the motorized valve (Y1E, Y2E) PI control to maintain the evaporator outlet
superheated degree (SH) at constant during heating operation to make maximum use of the
outdoor unit heat exchanger (evaporator).
The optimum initial value of the evaporator outlet superheated degree is 9°F, but varies
depending on the discharge pipe superheated degree of inverter compressor.
Sub-cooling Motorized Valve EV3 Control
Makes PI control of the motorized valve (Y3E) to keep the superheated degree of the outlet gas
pipe on the evaporator side for the full use of the sub-cooling heat exchanger.
SH = Ts - Te
SH : Evaporator outlet superheated degree (°F)
Ts : Suction pipe temperature detected by thermistor
R2T (°F)
Te : Low pressure equivalent saturation temperature
(°F)
SH = Tsh
-Te
SH : Outlet superheated degree of evaporator (
°
F)
Tsh : Suction pipe temperature detected with the
thermistor R5T (
°
F)
Te : Low pressure equivalent saturation temperature
(
°
F)
Содержание REYQ72
Страница 35: ...Specifications SiUS39 602 24 Specifications...
Страница 121: ...Field Setting SiUS39 602 110 Test Operation...
Страница 129: ...Troubleshooting by Remote Controller SiUS39 602 118 Troubleshooting...
Страница 225: ...Troubleshooting OP Unified ON OFF Controller SiUS39 602 214 Troubleshooting...
Страница 229: ...Piping Diagrams SiUS39 602 218 Appendix 1 Piping Diagrams 1 1 Outdoor Unit REYQ72M 96MTJU 4D045329A...
Страница 232: ...SiUS39 602 Piping Diagrams Appendix 221 1 3 BS Unit BSVQ36MVJU BSVQ60MVJU 4D045338...
Страница 234: ...SiUS39 602 Wiring Diagrams for Reference Appendix 223 2 2 Field Wiring REYQ72 96MTJU C 3D050361A...
Страница 235: ...Wiring Diagrams for Reference SiUS39 602 224 Appendix REYQ144 168 192MTJU C 3D050354A...
Страница 238: ...SiUS39 602 Wiring Diagrams for Reference Appendix 227 FXAQ07M 09M 12M 18M 24MVJU FXHQ12M 24M 36M 3D046039C 3D048116...
Страница 239: ...Wiring Diagrams for Reference SiUS39 602 228 Appendix FXLQ12M 18M 24MVJU FXNQ12M 18M 24MVJU 3D045644A...
Страница 240: ...SiUS39 602 Wiring Diagrams for Reference Appendix 229 2 4 BS Unit BSVQ36M 60MVJU 3D045069A...
Страница 249: ...Example of Connection R 410A Type SiUS39 602 238 Appendix...
Страница 255: ...Method of Replacing The Inverter s Power Transistors and Diode Modules SiUS39 602 244 Appendix...
Страница 265: ...Precautions for New Refrigerant R 410A SiUS39 602 254 Precautions for New Refrigerant R 410A...
Страница 269: ...SiUS39 602 iv Index...