LG Multi IV Engineering Manual page 82

REFRIGERANT FLOW DIAGRAMS
Indoor HEX Indoor HEX
Fan Fan
Indoor HEX Indoor HEX
Fan Fan
Indoor HEX Indoor HEX
Fan Fan
Indoor HEX Indoor HEX
Fan Fan
Outdoor Outdoor
Temperature Temperature
M M
Sensor Sensor
Outdoor unit Outdoor unit
HEX Temperature HEX Temperature
Sensor Sensor
Low Low
Hot Vapor Valve
Upper
Hot Vapor Valve
Upper Upper
Outdoor Outdoor
EEV EEV
Sub-cooling Circuit Sub-cooling Circuit
Outlet Temperature Outlet Temperature
Sensor Sensor
*8 ton and 10 ton units have 2 fans.
**Active path: The refrigerant circuit(s) of an outdoor unit coil that provide(s) continuous heating capacity during split coil defrost operation.
Press u re Sensor
Remarks
Pressure Sw itch
82 | PRODUCT DATA
EEV EEV
Indoor Unit Indoor Uni
EEV EEV
Indoor Uni Indoor Unit
EEV EEV
Indoor Uni Indoor Unit
EEV EEV
Indoor Unit Indoor Uni
Fan Fan
M M
High Pressure High Pressure Pressure Pressure
Sensor Sensor
Switch Switch
Active path Active path
4-Way Valve 4-Way Valve
SC suction SC suction
Suction Suction
Temperature Temperature
Sensor Sensor
Low Low
Pressure Pressure
Comp1 Comp1
Discharge Discharge
Sensor Sensor
Temperature Temperature
Accum Accum
Sensor Sensor
Oil Oil
Receiver Receiver
Receiver Receiver
Balance Balance
outlet outlet
Low
Outdoor
EEV
Oil Return Oil Return
Receiver Receiver
inlet inlet
Sub-Cooling HEX Sub-Cooling HEX
Sub-cooling Circuit Sub-cooling Circuit
inlet Temperature inlet Temperature
Sensor Sensor
Sub-Cooling Sub-Cooling
Temperature Sensor
SVC Valve
©
High Temperature High Pressure Vapor
High Temperature High Pressure Liquid
Low Temperature Low Pressure Vapor
High Pressure Vapor Pipe
Low Pressure Vapor Pipe
Liquid Pipe
Liquid Pipe Liquid Pipe
Temperature
Sensor
Oil Oil Oil Oil
Separ Separ Separ Separ
Comp1 Comp1 Comp2 Comp2
-ator -ator -ator -ator
Vapor Vapor Vapor Vapor
Injection Injection Injection Injection
Comp2 Comp2
Discharge Discharge
Temperature Temperature
Sensor Sensor
Inverter Inverter Inverter Inverter
Comp1 Comp1 Comp2 Comp2
Check Valve
EEV
Oil Return and Defrost
Heat Recovery Unit
s s
s s
s s
s s
s s
s s
s s
s s
s s
ARUB145BTE4/145DTE4,
ARUB169BTE4/169DTE4
frames are ONLY for use in
large capacity triple frame
combinations. They cannot be
used as stand alone models
or in a dual frame combina-
tion. These frames ARE
NOT interchangeable with
ARUB144BTE4/144DTE4,
ARUB168BTE4/168DTE4
single frame models.
Solenoid Valve
Strainer
Operation