LG ARNU Series - Page 191

- 191 -
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4.3.3 Oil return/Defrost Operation(Series)
:High temperature / High pressure liquid
:High temperature / High pressure gas
:Low temperature / Low pressure gas
Heat Exchanger
Fan
lndoor unit
EEV
Filter
Filter
Heat Exchanger
Fan
lndoor unit
EEV
Filter
Filter
H/G
IM FAN IM FAN
Gas pipe
Liquid pipe
O/S
Liquid Injection
O/S
High/Low Pressure Common
Sub Outdoor Unit Liquid Sub Outdoor High/Low Pressure Common Sub Outdoor Unit Gas
S
S S
Accum.
Pressure sensor
Pressure switch
Check valve
EEV
Thermistor
Solenoid valve
Service valve
Strainer
S
INV : Inverter compressor
CON : Constant speed compressor
EEV : Linear Expansion Valve
O/S : Oil Separator
Accum. : Accumulator
INV CON
Piping Diagrams