Volkswagen Golf 1999 Service Manual page 3853

A/C refrigerant system
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CAUTION!
- Immediately plug open connections on
A/C components to prevent dirt and
moisture contamination. Likewise, DO NOT
remove new components from packaging
until ready to install. Immediately tighten
component connections after installation
- Always use separate refrigerant
recovery/recycling/recharging servicing
equipment for R-12 and R-134a systems.
DO NOT use one piece of equipment for
both R-12 and R-134a systems. The
residual traces of refrigerant will
contaminate and damage the equipment.
Servicing equipment includes
recovery/recycling/recharging unit,
charging station, vacuum pump, manifold
gauges, etc.
- DO NOT use R-12 servicing equipment on
R-134a systems or R-134a equipment on
R-12 systems or damage to both the
vehicle A/C system and servicing
equipment may result. Use only equipment
designed to meet Society of Automotive
Engineers (SAE) standards
- R-134a and R-12 systems use different
size service fittings. NEVER use adaptors
to convert an R-12 fitting to R-134a size or
R-134a fitting to R-12 size
- R-134a and R-12 A/C components
including compressor, hoses, O-rings,
evaporator, condenser, receiver-drier, etc.
are NOT interchangeable. Components of
the R-134a system are identified by
lettering (R-134a) or by a green label (or
stripe). In addition a label on the upper
radiator support identifies which type
refrigerant is used. Use only the correct
system component for each refrigerant
type
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13/2/2005