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Page Title: Figure 5-3. Thermostatic expansion valves, removal and installation.
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Figure 5-3. Thermostatic expansion valves, removal and installation.
c. Removal.
tor to prevent evaporator freeze up. It also by-
passes refrigerant gas from the discharge line to
(1) Remove top cover from unit.
the suction line during bypass operation when the
(2) Discharge refrigerant (para 6-1).
switch is on COOL. The valve is preset to estab-
(3) Refer to figure 5-2 and remove the back
lish a minimum pressure of 57.8 PSIG in the eva-
pressure regulating valve.
d. Installation.
porator.
b. Adjustment.
(1) Install the back pressure regulating
valve and top cover by reversing the order of re-
(1) Remove the button plug from the cap at
moval.
top of valve.
(2) Attach a service gage to read suction
(2) Replace the dehydrator (para 5-18).
pressure.Turn screw clockwise to raise pressure
(3) Evacuate and recharge the refrigerant
and counterclockwise to reduce pressure.

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