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 TM 9-2320-312-24-1
AIR CONDITIONING SYSTEM MAINTENANCE - CONTINUED
0149 00
PURGING
NOTE
Dry nitrogen gas is recommended for purging. A pressure regulator is required to regulate between 0 to 200
psi (0-1379 kPa). Commercial cylinders of nitrogen contain pressures in excess of 2000 psi (13,780 kPa);
this pressure MUST be reduced to 200 psi (1379 kPa) for purging.
1.
Recover system refrigerant (Refer to Recovery).
2.
Disconnect both ends of line or part being purged. Tightly cap rest of system.
3.
Ensure valves (9, 8, and 12) are closed.
9
10
11
8
12
A
13
12
11
B
A
To Waste Container
B
To Recycling System Container
8
Purging Control Valve
11
Drain Line
9
Nitrogen Bottle Control Valve
12
Supply Line Valve
10
Nitrogen Bottle Regulator/Gauge
13
Nitrogen Bottle
4.
Connect supply line valve (12) to outlet end of part or line.
5.
Connect drain line (11) to inlet end of part or line.
6.
Place outlet of drain line into a recycling system container.
0149 00-4
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