Trane GAM5B0A18M11EB Installation, Operation And Maintenance Manual page 13

6.2 Four-Way Conversion
To place the unit in the configuration your application requires (upflow, downflow, horizontal right, or horizontal left),
simply turn the unit to that orientation.
Note: The air handlers are shipped from the factory suitable for four-way application.
Note: Entry for low voltage connections is allowed on either side of cabinet.
Downflow Configuration
Low Voltage
Connections
inside unit
Upflow
Condensate
Drains
Low Voltage
Connections
inside unit
Refrigerant
Connections
Downflow
Condensate
Drains
Refrigerant
Connections
Upflow Configuration
13