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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 Uni
Indoor Unit
EEV
EEV
Indoor Unit
Indoor Uni
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

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