LG MULTI V WATER IV ARWN LAS4 Series Service Manual page 19

Heating Operation
IDU HEX
EEV
M
IDU
High Pressure Gas
High Pressure Liquid
Low Pressure Gas
Outside
Air Temp.
Water
Outlet pipe
Water Outlet
Temp.
Water
Inlet pipe
Plate
HEX
SC HEX
Outlet Temp.
Pressure Sensor
Remarks
Pressure Switch
IDU HEX
Flare
Joint
M
Flare
Joint
S
Low
Pressure
Sub-Cooling HEX
EEV Service Valve
Strainer Check Valve
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EEV
IDU
Outside Unit
High
Pressure
Discharge
Temp.
High
Pressure
INV
Comp
Suction
Temp.
Liquid
Temp.
4Way Valve
Temperature Sensor
S
Solenoid Valve
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Piping Diagrams
Flare
Joint
Flare
Joint
Gas
Liquid