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Cooling Mode
Indoor HEX
Fan
Indoor HEX
Fan
Indoor HEX
Fan
Indoor HEX
Fan
Outdoor
Temperature
Sensor
Outdoor unit
HEX Temperature
Sensor
Upper
Outdoor
EEV
*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.
Pr ess u re Sensor
Remarks
Press ure Sw itch
REFRIGERANT FLOW DIAGRAMS
EEV
Indoor Unit
EEV
Indoor Unit
EEV
Indoor Unit
EEV
Indoor Unit
Fa n
M
M
High Pressure
Sensor
Active path
4-Way Valve
Low
SC suction
Suction
Hot Vapor Valve
Temperature
Sensor
Low
Pressure
Comp1
Upper
Discharge
Sensor
Hot Vapor Valve
Temperature
Accum
Sensor
Oil
Receiver
Receiver
Balance
outlet
Low
Outdoor
EEV
Oil Return
Sub-cooling Circuit
Outlet Temperature
Receiver
Sensor
inlet
Sub-Cooling HEX
Sub-cooling Circuit
inlet Temperature
Sensor
Sub-Cooling
Temperature Se nsor
SVC Valve
©
High Temperature High Pressure Gas
High Temperature High Pressure Liquid
Low Temperature Low Pressure Gas
Pressure
High Pressure Vapor Pipe
Switch
Low Pressure Vapor Pipe
Liquid Pipe
Liquid Pipe
Temperature
Sensor
Oil
Oil
Separ
Separ
Comp1
Comp2
-ator
-ator
Vapor
Vapor
Injection
Injection
Comp2
Discharge
Temperature
Sensor
Inverter
Inverter
Comp1
Comp2
Check Valve
EEV
Heat Recovery Unit
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.
Sole noid
Valve
Strainer
PRODUCT DATA | 79

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