TM 10-5410-228-24
NOTE
Keep R22 refrigerant container upright at all times so R22 refrigerant enters system as a
gas.
(4) Open R22 refrigerant source to allow R22 refrigerant to flow into center hose (13).
(5) Purge manifold gage set hoses as follows:
(a)
Loosen center hoses (11) at manifold gage sets (1) center ports slightly until R22
refrigerant escapes, then tighten hoses (11).
Failure to close high pressure gage valves will cause compressor to build pressure in
refrigerant container, causing injury to personnel or damage to equipment.
(b)
Make sure high pressure gage valves (3) are in closed position on manifold gage sets (1)
during charging.
(6)
Close high pressure gage valves (3) on manifold gage sets (1).
(7)
Start ECV engine and turn EPG on.
(8)
Turn on air conditioning and set for maximum cool.
(9)
Open low pressure gage valves (4) on manifold gage sets (1) until system is fully charged.
(10) Close low pressure gage valves (4) on manifold gage sets (1).
(11) Turn off air conditioning system.
(12) Turn off EPG and shut off ECV engine.
(13) Remove R22 refrigerant source from center hose (13).
(14) Check R22 refrigerant system for oil leaks and compressor oil level.
(15) Remove manifold gage sets (1) per para 3.9.1.h.
g. Pump Down System (Refer to Figure 3-6)
NOTE
Prior to removing refrigerant components, the system should first be `pumped down'.
Pumping down the system is a procedure which stores the R22 refrigerant in the receiver
which allows for the removal of components.
(1)
Connect manifold gage set low pressure gage hose (7) to evaporator low pressure service port (9)
located on the passenger side of the ECU.
(2)
Turn low pressure gage valve (4) to its closed (front seated) position.
(3)
Gain access to R22 refrigerant components in ECU and turn off receiver liquid line service valve
(20) clockwise to full closed (front seated) position.
(4)
Start ECV engine and turn EPG on.
(5)
Turn on air conditioning system and set for maximum cool.
(6)
Run air conditioning system until the gage on the suction side reads 0 (zero) or close to 0 (zero).
(7)
Shut air conditioning system off.
Change 1
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