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Figure 5-4. High pressure cutout switch and hot gas bypass solenoid valve, removal
and installation.
c. Removal.
(4) Recheck system suction pressure after
(1) Remove top cover from unit (para 3-6).
proper charging.
(2) Discharge refrigerant (para 6-1).
(3) Refer to figure 3-14 and remove the
5-13. Thermostatic Expansion Valves
back pressure regulating valve.
a. General. A l-ton thermostatic. expansion
d. Installation.
valve controls the flow of liquid refrigerant into
(1) Install the back pressure regulating
the evaporator coil during the cooling cycle. The
valve and top cover by reversing the order of re-
½-ton thermostatic expansion valve functions
moval.
(2) Replace the dehydrator
(3) Evacuate and recharge
system (para 6-1).
when the unit is in the bypass cycle. Each expan-
(para 5-17).
sion valve is provided with a superheat setting to
the refrigerant
insure the operating efficiency of the refrigerant
system.
5-7
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