REFRIGERATION SYSTEM SERVICING - (CHARGING). - continued

TM 5-4120-386-14

5-15. REFRIGERATION SYSTEM SERVICING - (CHARGING) - Continued.

LOCATION/ITEM

ACTION

REMARKS

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.

Switch refrigerant cylinder

to vapor position. Open cylinder

valve and the manifold low pressure

valve.

Check air conditioner for proper

cooling. There should be at

least a 5oF temperature diffe-

rence between evaporator discharge

air and inlet air. Turn mode

selector switch to OFF.

Close the high and low pressure

service valves and remove charging

manifold hoses.

Install service valve protective

caps.

Secure service valve access

cover using four screws.

5-54