TB 9-2320-360-13&P-1
A/C SYSTEM REFRIGERANT (R-134A) MAINTENANCE - CONTINUED
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FLUSHING
WAR N I N G
Use care to prevent refrigerant from touching your skin or eyes; wear protective goggles and nonleather gloves when
servicing Air Conditioning systems. Liquid refrigerant, when exposed to air, quickly evaporates and will freeze skin or
eye tissues. Serious injury or blindness may result if you come in contact with liquid refrigerant.
Refrigerant R-134a A/C systems should not be pressure tested or leak tested with compressed air. Combustible
mixtures of air and R-134a may form, resulting in a fire or explosion, which could cause personnel injury or
death.
1.
Recover system refrigerant.
2.
Disconnect both ends of line or component to be purged.
3.
Install caps or plugs tightly on system lines or components at disconnect points.
4.
Charge or pressurize R-134a refrigerant (1) as recommended by manufacturer.
5.
Connect recovery/recycling station flushing supply line (2) to outlet hose (3) side of system to reverse flow system.
N OT E
If system is extremely contaminated, install a receiver/dryer in-line as a prefilter for recovery/recycling station.
6.
Connect recovery/recycling station flushing drain line (4) from inlet valve side of system to receiving container (5).
7.
Turn on recovery/recycling station (6) and open inlet valve (7). Allow about two pounds (one kilogram) of R-134a to
flow through system.
8.
Close supply line valve (8) and wait for recovery/recycling station (6) to shut off.
9.
Disconnect recovery/recycling station flushing supply line (2) from outlet hose (3).
10.
Disconnect recovery/recycling station flushing drain line (4) from inlet valve (7).
11.
Purge system and check collection bottle for contaminants.
12.
Refer to WP 0012 00 for general cleaning requirements.
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