INSTALL COMPRESSOR

TM 5-4120-393-14

5-28. Compressor (B1) (cont)

12. Fill reservoir with fluorocarbon refrigerant, R-1 1, and start the pump. Continue filling the reservoir with refrigerant,

R-11, until it begins to pour out of the return line. Continue flushing for at least 15 minutes.

13. Reverse the pump connections, replace the filter with a new filtering medium, and backflush t e system for an

additional 15 minutes.

14. Remove the pump, reservoir and filter and dehydrator jumper. Place an empty container below the compressor

connections, and connect a cylinder of dry nitrogen to each dehydrator connection in turn. Blow down each leg of the

system at 50 psig (3.5 kg/cm ) for at least 30 seconds.

INSTALL COMPRESSOR

CAUTION

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 installing it in the air

conditioner. Check to see that replacement compressor is equipped with the same

type of heaters as were on the old compressor. If not, remove heaters and related

parts from old compressor or replace with new ones. Locate parts and mount

using old compressor as a guide. Installation of the thermostat mounting angle

will require drilling of two holes. Match drill from angle.

Lift compressor through the lower front panel opening and position it on base pan.

Lift or tilt compressor and install washer and flat washer between each of the four compressor mounting feet and the

base pan.

Install a flat washer and a washer on each of the four bolts, then install the bolts beneath the pan base and install nuts

on bolt.

Wrap wet rags around compressor at connection points and while brazing direct flame away from compressor.

While purging the system with nitrogen, braze the tubing joints. See para 5-10 and 5-11.

Replace dehydrator. See para 5-16.

Connect electrical connector plug (P11) to connector (J11) on compressor terminal box.

Leak test all newly connected joints and those in the repair area. See para 5-12.

Reinstall and tape in place tubing insulation that was removed from suction line tubing. If it was damaged, replace

with tubing insulation.

10. Connect electrical connection plug P2 to connector J2 on condenser fan motor.

11. Evacuate and charge the refrigerant system. See para 5-13 and 5-14.

5-74