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Page Title:
Section III. CONTROLS AND INSTRUMENTS |
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 TM5-4120-274-15
Section III. CONTROLS AND lNSTRUMENTS
line pressure has reduced to 400 psig, the high
2-9. General
pressure cutout control can be reset by pushing
This salon describes, locates, illustrates, and
the reset button (fig. 3-13).
furnishes the operator, crew or organizational
c. Low Pressure Cutout Control. The low pres-
maintenance personnel sufficient information
sure cutout located at the upper left rear of the
about the various controls and instruments for
unit (fig. 1-3) is designed to sense line pressure
proper operation of the air conditioner.
from the compressor and will cutout at 25 psig
pounds per square inch gage. When the line pres-
sure has increased to 50 psig, the low pressure
a. General. The purpose of Controls and instru-
cutout control can be reset by pushing the reset
ments and their normal and maximum readings
button (fig. 3-13).
d. Liquid Line Sight Glass. The sight glass
are illustrated in figure 2-2.
b. High Pressure Cutout Control. The high
pressure cutout located at the upper left rear of
ture in the refrigerant is shown by the indicator
turning from green to yellow. A shortage of re-
the unit (fig. 1-3) is designed to sense line pres-
frigerant is indicated by flash gas in the sight
sure from the compressor and will cutout at 445
glass.
psig (pounds per square inch gage). When the
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