Trane 4TXM2318BF300AA Service Manual page 48

4.4.1 Parts and Functions
Receive window and
function indicator of remote
controller (used for remote
control models)
Air return guide
(it is open when the unit is
running)
Drain pipe
Liquid inlet pipe
Injection nozzle
Gas return pipe
46
Air-out guide plate (using the
wind direction adjusting key of
remote controller to adjust air-
out direction)
Electrical box assy(in
the air return guide)
Filter (in the air return
guide)