TM 10-8145-222-23
0014
SERVICE CONTINUED
32. Evacuate refrigeration unit until vacuum gauge indicates 500 (+1/-0) microns.
33. Close vacuum pump manifold valve.
34. Turn off vacuum pump.
35. Wait five minutes and observe vacuum holds at 500 microns to check for residual moisture and/or leaks.
Perform refrigerant charging, or release refrigerant into system, immediately while system is still in deep
vacuum per this WP.
36. Remove doughnut magnet (Figure 5, Item 5) from compartment 1 and compartment 2 liquid and hot gas
solenoid valves (Figure 5, Item 6).
Each solenoid will de-energize, and an audible clicking will be heard signifying the valves close.
37. Install compartment 1 and compartment 2 evaporator liquid and hot gas solenoid valve coils (Figure 5, Item 4),
(WP 0064, Replace). If the hot gas solenoids were removed, reinstall as tagged.
38. Close evaporator cover (Figure 5, Item 3) and secure using two bolts (Figure 5, Item 1) and washers (Figure 5,
Item 2).
Purge
1. Connect service hose to nitrogen tank.
2. Make sure gauge set service valve is closed.
3. Open nitrogen tank valve.
4. Open gauge set discharge valve and pressurize system to at least 350 psi.
5. Close gauge set discharge valve and nitrogen tank valve.
6. Disconnect service hose from nitrogen tank.
Charge System with Refrigerant
Charge the refrigerant system as follows:
CAUTION
Do not use vapor charge R-404A refrigerant. Use only liquid charging through liquid
line valve.
1. If refrigeration unit is not in deep vacuum from evacuation and dehydration, perform evacuation and
dehydration.
2. Place refrigerant cylinder (Figure 6, Item 1) on scale (Figure 6, Item 2).
3. Connect charging line (Figure 6, Item 3) from cylinder (Figure 6, Item 1) to receiver outlet valve (Figure 6,
Item 4) and open cylinder vapor valve.
0014-14
