IV-17ACCESSORIES3) MCU-4EAEV11 Heating solenoid valve This valve opens during heating and main heating operation.2 Cooling solenoid valve This valve opens during cooling and main cooling operation.3 MCU liquid bypass valve This valve is used to prevent pipe from refrigerant accumulation in heating operation.4 MCU EEV It controls refrigerant amount to balance between outdoor heat exchanger and indoorheat exchanger in main heating operation.5 Subcooler The subcooler can secure the subcooling of refrigerant in MCU.6 Subcooler_in temp.sensor These temperature sensors enable to control subcooler EEV’s step to secure7 Subcooler_out temp.sensor subcooling of refrigerant.8 Subcooler EEV It enables to secure sufficient subcooling of entering refrigerant to MCU kit.9 EEV This EEV can be used for wall mounted / ceiling unit.10 EEV bypass valve This valve has to be closed when wall mounted / ceiling unit are connected withoutsingle EEV kit.No Cycle parts FunctionsLiquid pipeconnection(Indoor unit)Gas pipeconnection(Indoor unit)EEVEEV bypass valveSubcooler EEVHeating solenoid valveMCU EEV MCU main heating valveMCU liquid bypass valveCooling solenoid valveLiquid pipe connection (Outdoor unit)Drain pipeHigh pressure gas pipe connection (Outdoor unit)Gas pipe connection (Outdoor unit)Indoor unitOutdoor unit4.Accessories(02~31) 3/6/08 13:59 Page 17