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TM 9-4120-367-14
TM 07592B-14/1
n. Sight Glass, Liquid Indicator. The condition of liquid refrigerant flowing through the system can be observed
through this window when the compressor is operating in the cooling mode. A milky or bubbly appearance of
the refrigerant indicates that the system contains insufficient refrigerant and that more must be added. The center
of hte sight glass has an area which indicates moisture content of the refrigerant. This area will change colors:
green, chartreuse, and yellow.
Figure 1-1. Air Conditioner, 3/4 Views
1-5
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