TM 5-4220-227-14
6-11.
Heater/Chiller Module (Cont).
Figure 6-18. Heater/Chiller Module, Repair (Sheet 2 of 3).
(2)
Replacement of evaporator coil. (figure 6-18)
(a)
Discharge refrigerant-22 from system.
(b)
Carefully unwrap insulation from discharge pipe of evaporator coil (1) and thermal expansion valve
probe (2).
(c)
Break refrigerant line by loosen nut (3) on discharge side of thermal expansion valve (4).
(d)
Loosen nut (5) on input side of compressor (6).
(e)
Carefully lift evaporator coil (7) out of reservoir (8).
(f)
Clean evaporator coil using nonionic detergent cleaner and use with clean distilled water.
(g)
Inspect evaporator coil for damage. Test for refrigerant leaks. Replace if damaged.
(h)
Carefully install evaporator coil (7) into reservoir (8).
(i)
Reconnect and tighten nut (5) on input side of compressor (6).
(j)
Reconnect and tighten nut (3) on discharge side of thermal expansion valve (4).
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