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TM5-4120-375-14
5-18. CHARGING THE SYSTEM. (cont.)
With power connected to the air conditioner, turn the rotary selector
switch to COOL and the temperature control thermostat to the maximum
COOLER position.
Let the air conditioner operate for 15 m i n u t e s
in this mode, then observe the sight-glass liquid indicator while the
a i r c o n d i t i o n e r i s r u n n i n g.
If bubbles or milkiness appears, top off
the refrigerant charge as follows:
5-20
( 1 ) .
With the air conditioner compressor operating, open the suction
service valve and the cylinder shutoff valve to charge
refrigerant gas into the system.
Continue to observe the
s i g h t - g l a s s l i q u i d i n d i c a t o r.
( 2 ).
When the liquid in the sight-glass liquid indicator runs clear
and free of bubbles, add additional 6-8 ounces (168-264 g) of
refrigerant. Close the suction service valve and the cylinder
shutoff valve.
(3).
Disconnect the manifold assembly and the refrigerant cylinder and
pressure-test the air conditioner in accordance with paragraphs
5-19 thru 5-24.
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