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SiEN18-622
Basic Control
Function
99
2.3
Electronic Expansion Valve PI Control
Main Electronic Expansion Valve EV1 Control
Carries out the electronic expansion valve (Y1E) 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 3°C, but varies
depending on the discharge pipe superheated degree of inverter compressor.
Subcooling Electronic Expansion Valve EV3 Control
Makes PI control of the electronic expansion valve (Y3E) to keep the superheated degree
(SH)
of the outlet gas pipe on the evaporator side for the full use of the subcooling heat exchanger.
SH = Ts1 - Te
SH : Evaporator outlet superheated degree (°C)
Ts1 : Suction pipe temperature detected by
thermistor R3T (°C)
Te : Low pressure equivalent saturation temperature
(°C)
SH = Tsh
-Te
SH : Outlet superheated degree of evaporator (
°
C)
Tsh : Suction pipe temperature detected with the
thermistor R6T (
°
C)
Te : Low pressure equivalent saturation temperature
(
°
C)
Содержание FTKS50BVMB
Страница 1: ...SiEN18 622 E Series Service Manual Applied Models zSuper Multi Plus Cooling Only Heat Pump ...
Страница 30: ...SiEN18 622 Specifications 17 Part 2 Specifications 1 Specifications 18 1 1 Cooling Only 18 1 2 Heat Pump 34 ...
Страница 105: ...Refrigerant Flow for Each Operation Mode SiEN18 622 92 Refrigerant Circuit ...
Страница 157: ...Indoor Unit SkyAir Models SiEN18 622 144 Function ...
Страница 204: ...Instruction SiEN18 622 192 System Configuration FTK X S 50 60 71 F Indoor Unit 1 2 4 3 10 11 9 7 8 15 12 13 14 16 6 5 ...
Страница 312: ...SiEN18 622 Ceiling Mounted Cassette Type System Configuration 300 ...
Страница 424: ...Method of Replacing The Inverter s Power Transistors Modules SiEN18 622 412 Troubleshooting ...
Страница 446: ...Wiring Diagrams SiEN18 622 434 Appendix ...
Страница 452: ...SiEN18 622 vi Index ...