(6) Remove the two screws (8) securing the control box (7).
(7) Remove the four bolts (9) securing the base of the compressor (3) to the base pan (10).
(8) Purge the system with nitrogen and debraze the tubing at the compressor. See paras 5-6 and 5-7.
If compressor burnout is suspected, use care when handling compressor to avoid touching
compressor sludge. Acid in sludge can cause burns.
(9) Remove the compressor from the unit.
The compressor is supplied with a complete charge of oil. Take care that oil is not lost when
handling an installing compressor.
If any refrigeration piping was disconnected with the compressor being replaced, transfer the piping to
the replacement compressor before Installing it in the air conditioner.
Lift new compressor (3, Figure 5-10) through the lower front door assembly opening and position it on base
(2) Install the four bolts (9) to secure the compressor (11) to the panbase (12).
Replacement compressor must have a new capacitor and contactor if system had a running
burnout. In all other cases check contacts of the capacitor and contactor. See para 4-26 and 4-
The suction line accumulator must be thoroughly flushed after a running burnout to remove any trapped
sludge to prevent plugging the oil return hole. The drier should be installed between the accumulator
and the compressor. In the case of a standing burn, the drier may be installed upstream of the suction
line accumulator, if desired.
(3) If system had a running burnout, go to step (4). If system did not have a running burnout, go to step (6).
Install a second drier immediately upstream of the compressor. The drier, when permanently installed in a
clean system, or as initially installed in a dirty system, must have a pressure drop not more than that of Table
5-2. Pressure taps must be Installed before and after the second drier to measure the pressure drops. See
Install an oil trap In the suction line immediately downstream from the drier if the old compressor has suffered
The oil trap port can be used to make pressure drop checks across the drier.
(6) Purge the system with nitrogen and braze the tubing at the compressor (3). See paras 5-6 and 5-7.
(8) Connect all wiring to the compressor terminals (1) and remove tags.
(9) Leak test all newly connected joints and those in the repair area. See para 5-8.