TM 5-3805-290-23-2
AIR CONDITIONING SYSTEM SERVICE - CONTINUED
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CHARGING
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1.
Connect charging hose (7) from manifold gage set (1) directly to refrigerant tank valve (21) on top of refrigerant tank
(10) and hand tighten.
2.
Open refrigerant tank valve (21).
3.
Loosen charging hose (7) at manifold gage (1) for 2 to 3 seconds, then hand tighten charging hose (7) again to purge air
from line.
N OT E
Correct refrigerant charging is determined by weight only and never by gage pressure.
4.
Position refrigerant tank (10) on scale (22) so that refrigerant tank valve (21) is on the bottom. Check weight of refriger-
ant tank periodically. Weight should decrease over time.
5.
Open high pressure valve (12) on manifold gage set (1) to allow liquid refrigerant to charge system.
6.
When refrigerant reaches system capacity, close refrigerant tank valve (21) and high pressure valve (12).
7.
Record amount of refrigerant added to system.
8.
Disconnect charging hose (7) from refrigerant tank (10).
9.
While compressor (4) is still operating, close high pressure valve (23) on compressor and disconnect high pressure hose
(5) from system. Open both valves (11 and 12) on manifold gage set (1). Close low pressure valve (24) on compressor
and disconnect low pressure hose (2) from system. Cap charging valves.
10.
Start engine and run AC on highest cool setting (TM 5-3805-290-10).
11.
Check for correct operation of AC system (TM 5-3805-290-10).
12.
Shut down engine (TM 5-3805-290-10).
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