TM 5-3805-281-24-2
Heating and Air Conditioning
10. Evacuate system for 30 minutes after 98 kPa (980
mbar) (29 in. Hg) vacuum is reached.
11. Close low-side and high-side valves. Stop evacuation.
12. Charge the system. (See procedure in this group.)
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1922JUL982/2
CHARGE R134A SYSTEM
CAUTION: Do not remove high pressure relief
valve (B). Air conditioning system will
discharge rapidly causing possible injury.
IMPORTANT: Use correct refrigerant recovery,
recycling and charging stations. DO
NOT mix refrigerant, hoses, fittings,
components or refrigerant oils.
1. Connect JT02047 R134a refrigerant recovery, recycling
and charging station. (See installation procedure in this
group.)
2. Evacuate the system. (See Evacuate Air Conditioning
System, this group.)
NOTE: Before beginning to charge air conditioning
system, the following conditions must exist:
Engine STOPPED, the pump must be capable of
pulling at least 28.6 in. Hg vacuum (sea level).
Subtract 3.4 kPa (34 mbar) (1 in. Hg) from 98 kPa
(980 mbar) (29 in. Hg) for each 300 m (1000 ft)
elevation above sea level.
3. Follow the manufacturer's instructions and charge the
A--Low Pressure Test Port
system.
B--High Pressure Relief Valve
C--Low Pressure Hose
D--Low Pressure Switch
4. Add refrigerant until system is charged with 2.43 kg
E--High Pressure Switch
(5.25 lb).
F--High Pressure Quick-Disconnect
G--Blue Hose
5. Do air conditioner checks and tests in Groups 9031-10
H--High Pressure Hose
and 9031-25.
I--Red Hose
18
J--Refrigerant Recovery/Recycling and Charging
1830
Station
12
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