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Table of Contents
Heating Mode
Indoor HEX
Fan
Indoor HEX
Fan
Indoor HEX
Fan
Indoor HEX
Fan
Outdoor
Temperature
Sensor
Outdoor unit
HEX Temperature
Sensor
Upper
Outdoor
EEV
Sub-cooling Circuit
Outlet Temperature
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
REFRIGERANT FLOW DIAGRAMS
EEV
Indoor Unit
EEV
Indoor Unit
EEV
Indoor Unit
EEV
Indoor Unit
Fan
M
M
High Pressure
Sensor
Active path
4-Way Valve
Low
SC suction
Suction
Hot Vapor Valve
Temperature
Sensor
Low
Comp1
Pressure
Upper
Discharge
Sensor
Hot Vapor Valve
Accum
Temperature
Sensor
Oil
Receiver
Receiver
Balance
Outlet`
Low
Outdoor
EEV
Oil Return
Receiver
inlet
Sub-Cooling HEX
Sub-cooling Circuit
inlet Temperature
Sensor
Sub-Cooling
Temperature Sensor
SVC Valve
©
High Temperature High Pressure Vapor
High Temperature High Pressure Liquid
Low Temperature Low Pressure Vapor
Pressure
High Pressure Vapor Pipe
Switch
Low Pressure Vapor Pipe
Liquid Pipe
Temperature
Liquid Pipe
Liquid Pipe
Sensor
Oil
Oil
Separ
Separ
Comp1
Comp2
-ator
-ator
Vapor
Vapor
Injection
Injection
Comp2
Discharge
Temperature
Sensor
Inverter
Inverter
Comp2
Comp1
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.
Solenoid Valve
Strainer
PRODUCT DATA | 81

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