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Page Title: PURGING THE REFRIGERANT SYSTEM.
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TM 5-4120-339-14
f.
Refer to figure 4-3 and open valve VA at point 4 and valve V6 at point 2.
g. Connect the nitrogen line to the tubing at point 1 and release nitrogen into the system for approximately 5
minutes or until moisture ceases to be discharged from the system.
h. Energize the liquid line solenoid valve by applying 24 volts dc across pins M and N of plug P10.
i.  Release nitrogen into the system for approximately 5 minutes or until moisture ceases to be discharged from
the system.
j.
Remove the nitrogen line from the tubing at point 1 and connect it to the suction pressure service valve V6 at
point 2.
k.  Release nitrogen into the system for approximately 5 minutes or until moisture ceases to be discharged from
the system.
l.  De-energize the liquid line solenoid valve and release nitrogen into the system for approximately 5 minutes or
until moisture ceases to be discharged from the system.
m. Remove the nitrogen line from the valve at point 2 and connect it to the discharge pressure service valve VA
at point 4.
n. Release nitrogen into the system for approximately 5 minutes or until moisture ceases to be discharged from
the system.
o. Energize the pressure equalizer solenoid valve K4 by applying 24 volts dc across pins C and F of plug P10.
p. Release nitrogen into the system for approximately 5 minutes or until moisture ceases to be discharged from
the system.
q. Remove the nitrogen line from the valve at point 4 and connect it to the tubing at point 3.
r.  Release nitrogen into the system for approximately 5 minutes or until moisture ceases to be discharged from
the system.
s.  De-energize the pressure equalizer solenoid valve and release nitrogen into the system for approximately 5
minutes or until moisture ceases to be discharged from the system.
t.  Remove the nitrogen line from the tubing at point 3 and cap tubing at points 1 and 3 until installation of a new
dehydrator.
u. Close valves V1 and V6.
v. Refer to figure 4-16 and install a new dehydrator.
4-13

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