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 TM 5-2410-237-23
AIR CONDITIONING REFRIGERANT SERVICING
(AIR CONDITIONING EQUIPPED MACHINES) - CONTINUED
0229 01
EVACUATING/RECYCLING
NOTE
System must have been recovered and compressor filled with correct amount of refrigerant oil. Replace
receiver-dryer if system is opened.
1.
Wearing protective goggles and non-leather gloves, attach recovery/recycling station hoses to valves.
NOTE
Push down firmly on hose connectors until a clicking sound is heard. This will ensure coupler is locked.
a.
Ensure recovery/recycling station valves are closed.
b.
Connect red high-side hose to discharge service valve.
c.
Connect blue low-side hose to suction service valve.
d.
Turn knob clockwise on each coupler to open shrader valves.
2.
Follow recovery/recycling manufacturer's instructions and evacuate/recycle refrigerant system.
FLUSHING
1.
Recover refrigerant system.
2.
Disconnect both ends of part or line being flushed. Tightly cap lines to rest of system.
3.
Heat R-134a refrigerant in a dial-a-charge or pressurize refrigerant as recommended by manufacturer.
4.
Connect dial-a-charge outlet hose to outlet side of system (this will ensure that R-134a will flow in reverse direction of
normal flow).
5.
Connect a line from inlet side of system to a recovery/recycling station.
NOTE
If system is extremely contaminated, install a receiver-dryer in-line as a pre-filter for recovery/recycling
station.
6.
Turn on recovery/recycling station and open outlet valve for dial-a-charge. Allow about 2 lb (1 kg) of R-134a to flow
through system.
7.
Close supply line valve and wait for recovery station to shut off.
8.
Disconnect supply line and drain line from dial-a-charge and recovery station. Connect lines to nitrogen bottle.
9.
Purge system and check collection bottle for contaminants. Repeat process if needed.
10.
Disconnect lines from part and tightly cap both ends of part.
CHARGING
NOTE
Refrigerant capacity is 4-6 lb (1.8-2.7 kg).
Before charging, system must be recovered and evacuated with recovery/recycling station connected to
service and discharge port connections. Test for leaks.
1.
Obtain enough refrigerant to fully charge system. Set tank on a scale and weigh for correct amount of refrigerant to enter
system. This prevents overcharging, which could damage compressor.
2.
Turn on main power disconnect switch. Start engine and run at 1500-2000 RPM. Turn unit on FULL COLD and HIGH
fan.
3.
Charge refrigerant system with R-134a refrigerant. The unit will require 4-6 lb (1.8-2.7 kg).
0229 01-3
Change 1
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