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TM5-4120-377-14
(14) Remove the pump, reservoir, filter, and dehydrator jumper. Place an empty container below the
compressor connections, and connect a cylinder of dry nitrogen to each filter-drier connection in turn. Blow
down each leg of the system at 50 psig (3.5 kg/cm2) for at least 30 seconds.
(15) Disconnect the dry nitrogen cylinder. Cap or plug open connections if compressor and filter-drier are
not to be installed immediately.
g. Compressor installation
The compressor is supplied with a complete charge of oil. Take care that oil is not lost
when handling and installing compressor.
NOTE
If any refrigeration piping was disconnected with the compressor being replaced, transfer
the piping to the replacement compressor before instalIing it in the air conditioner. Check
to see that replacement compressor is equipped with a heater, if not, remove heater from
old compressor or replace with new one.
(1) Lift compressor through the lower front panel opening and position it on base pan.
(2) Lever or tilt the compressor and install the rubber washer and bushing between each of the four
compressor mounting feet and the base pan.
(3) Install two flat washers and a rubber washer on each of the four mounting shoulder screws, then insert
the shoulder screws from beneath the base. Secure with four flat washers and lock nuts on top of mounting feet.
(4) Wrap wet rags around compressor at connection points and while brazing direct flame away from
compressor.
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
While purging the system with nitrogen, braze the tubing joints. (See para 5-7 and 5-8.)
Replace the dehydrator. (See para 5-13.)
Connect electrical connector plug (P4) to connector (J4) on compressor terminal box.
Leak test all newly connected joints and those in the repaired area. (See para 5-9.)
Install junction box. (See para 4-46.)
Install lower front panel. (See para 4-29.)
Install side access plate. (See para 4-22.)
Evacuate and charge the refrigerant system. (See para 5-10 and 5-11.)
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