CHARGING THE REFRIGERANT R-22 SYSTEM - continued

TM9-4120-423-14&P

After 15 minutes, observe the sight glass on back of condenser section.

Green center means the Refrigerant R-22 moisture content is acceptable.

Yellow center means there is too much moisture in the system. It must be discharged, evacuated

and charged again.

Milky white or bubbly liquid means the system has a low charge.

Clear bubble-free liquid around the center means the system is fully charged.

If charge is low, add gas Refrigerant R-22.

Be sure that drum is switched to gas position. Open the drum valve and the air conditioner low-

pressure service valve.

Continue to charge until sight glass is clear and bubble-free.

Close the Refrigerant R-22 drum valve and the air conditioner low-pressure service valve.

Check air conditioner for proper cooling. There should be at least a 20-degree +/- 5-degree

temperature difference between evaporator discharge air and the inlet air.

Turn the MODE SELECTOR SWITCH to OFF.

Close the high and low-pressure air conditioner service valves, and remove the charging

manifold hoses from the air conditioner service valves.

END OF TASK

0075 00-4