IV-17
A
CCESSORIES
3) MCU-4EAEV1
1 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 indoor
heat 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 secure
7 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 without
single EEV kit.
No Cycle parts Functions
Liquid pipe
connection
(Indoor unit)
Gas pipe
connection
(Indoor unit)
EEV
EEV bypass valve
Subcooler
EEV
Heating solenoid valve
MCU EEV MCU main heating valve
MCU liquid bypass valve
Cooling solenoid valve
Liquid pipe connection (Outdoor unit)
Drain pipe
High pressure gas pipe connection (Outdoor unit)
Gas pipe connection (Outdoor unit)
Indoor unit
Outdoor unit
4.Accessories(02~31) 3/6/08 13:59 Page 17
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