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EVAPORATOR COIL (Continued)
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TM-5-4120-359-14 Air Conditioner Split Package 18 000 BTU/HR Cooling 30 000 BTU/HR Heating 208 Volt 3 Phase 400 Hertz Manual
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COUPLING HALF, MALE (EVAPORATOR REFRIGERANT PIPING DISCONNECT) (continued)
TM 5-4120-359-14
(17)Evacuate and charge the refrigeration system in accordance with paragraphs 4-9 and 4-10.
Follow-on Procedures: 1. Install the heater assembly. (See paragraph 4-32.)
2. Install the front evaporator cover and radio frequency filter. (See paragraphs 3-17 and 4-17.)
3. Install the access cover. (See paragraph 3-14.)
4. Install the return air screen and frame. (See paragraph 3-18.)
5. Install air conditioner on shelter. (See paragraph 3-6.)
4-35. COUPLING HALF, MALE (EVAPORATOR REFRIGERANT PIPING DISCONNECT)
Preliminary Procedures: 1. Remove air conditioner from shelter. (See paragraph 3-6.)
2. Remove access cover. (See paragraph 3-14)
3. Remove front evaporator cover and radio frequency filter. (See paragraphs 3-17 and 4-17.)
Supplies: Refrigerant Oil
a. General. The coupling half fittings (hose disconnect fittings) used for joining the interconnecting refrigerant metal
hoses, contain a poppet valve assembly to prevent refrigerant loss and to keep air from entering the line when hoses are
disconnected.  The following instructions apply to both the suction (low pressure) and discharge (high pressure)
couplings.
b. Inspect. Check couplings for cracks, breaks, loose connections, and evidence of leakage. Repair or replace
defective parts.
c.
Test. Leak test in accordance with paragraph 4-8.
d. Repair or replacement. All repairs other than tightening of screw joints will require disassembly and replacement
of some parts. When the half couplings are disassembled for any reason, the O-rings and gaskets should be replaced.
Figure 4-33. Male Coupling Half
4-81

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