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 TM 5-4120-339-14
(g) Energize the pressure equalizer solenoid valve by applying 24 volts dc across pins C and F of plug
P10.
(h) Release nitrogen into the system for approximately 5 minutes or until moisture ceases to be
discharged from the system.
(i) Remove the nitrogen line from the tubing at point 2 and connect it to the tubing at point 5. Release
nitrogen into the system for approximately 5 minutes or until moisture ceases to be discharged from the system.
(j) 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.
(k) Remove the nitrogen line from the tubing at point 5 and connect it to the tubing at point 4. Release
nitrogen into the system for approximately 5 minutes or until moisture ceases to be discharged from the system.
(l) Remove the nitrogen line from the tubing at point 4 and connect it to the valve at point 6. 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 6 and connect it to the valve at point 3. Release
nitrogen into the system for approximately 5 minutes or until moisture ceases to be discharged from the system.
(n) Remove the nitrogen line from the valve at point 3.
(o) Close valves V1 and V6.
(p) Cap all open tubing until installation of new components.
f.
Installation.
(1) Refer to figure 3-13 and connect plug P10 (3) to receptacle J10 (4) on the junction box.
(2) Refer to figure 4-16 and install a new dehydrator.
(3) Refer to figure 4-18 and install a new compressor.
(4) Refer to figure 3-13 and install the junction box.
(5) Refer to figure 4-4 and evacuate the refrigerant system.
(6) Refer to paragraph 4-10 and charge the system with refrigerant. Leave the pressure gages connected.
(7) Connect the unit to an appropriate electrical power source, turn the selector switch to the "COOL"'
position and the thermostat control knob counter-clockwise to its limit.
(8) Refer to paragraph 4-4c and check the system for refrigerant leaks.
4-45
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