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TM5-4120-387-14
t .
Run the air conditioner in COOL mode (with Temperature control thermostat in
full DECREASE position and fan speed set at LO SPEED) for 15 minutes.
Do not skip the next step.
u.
After 15 minutes, observe the sight glass on back of condenser section.
Green center means the refrigerant 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.
v .
If charge is low, add gas refrigerant.
(1) Be sure that drum is switched to gas position. Open the drum valve
and the air conditioner low pressure service valve.
(2) Continue to charge until sight glass is clear and bubble-free.
(3) Close the air conditioner low pressure charging valve and refrigerant
drum valve.
w.
Check air conditioner for proper cooling. There should be at least a 15°F
temperature difference between evaporator discharge air and the inlet air. Turn
the mode selector switch to OFF.
x .
Assure that the high and low pressure air conditioner charging valves are
closed and remove the charging manifold hoses from the air conditioner charging
valves.
y .
Install service valve protective caps.
5-19
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