Subaru R-12 - Manual (Page 5)

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To connect the manifold gauge set to the system:
➊
Fully close both of the manifold valves.
➋
Remove the compressor service valve caps.
➌
Connect the high and low pressure hoses to the service valves.
Note: Some refrigerant gas will be discharged as the hoses are connected to the
service valves. This is normal, however, you should attempt to connect the
hoses as quickly as possible to prevent excess refrigerant loss and air from
entering the system.
Note: Start vehicle engine and follow the directions concerning idle speed, etc.,
contained in the appropriate model year Subaru Service Manual.
Note: Federal Law requires that all A/C service hoses be equipped with check
valves at or near the service hose connections. These check valves prevent
refrigerant in the hoses from escaping to the atmosphere.
To disconnect the gauge set from service valves:
➊
Quickly disconnect the charging hoses from the service valves.
➋
Always disconnect the low side while the engine is running.
➌
Disconnect the high side with the engine OFF and after the pressure
has stabilized.
Manifold gauge interpretation takes some practice and must be completed
with consideration of the other symptoms and potential problems that have been
identified in the system.
Precautions
➊
Wear protective clothing and eyewear, do not allow skin to come in direct
contact with refrigerant.
➋
Do not store or allow refrigerant containers to exceed 52 degrees C.
(126 degrees F.)
➌
Do not use refrigerant in confined spaces with poor ventilation.
➍
Do not use R-12 refrigerant in the presence of an open flame.
➎
Do not steam clean system.
➏
Do not drop refrigerant containers or otherwise cause the container
to rupture.
➐
Follow proper procedure while connecting/ disconnecting hoses of
manifold gauges, vacuum pump, oil separator, and charging systems.
➑
Open and close manifold gauge valves carefully.
➒
Exercise caution while working around drive belts, pulleys, and other
moving components of an operating air conditioning system.
➓
Ensure the proper level and type of compressor oil in system.
Note: Do not introduce compressed air into R-134a components.
Subaru Air Conditioning Systems
8