Bentley Volkswagen.Golf.Jetta.R32.Official.Factory.Repair.Manual.1999-2005

General information for A/C system
Página 16 de 19
cushion), vessels will rupture with devastating effect in the
event of an increase in temperature 00-1,
Characteristics of refrigerant R134a .
Refrigerant is never to be transferred to systems or vessels
in which air is present.
Corrective action:
- Evacuate systems and vessels before charging with
refrigerant.
Basic rules for working on refrigerant
circuit
- Observe workplace-specific instructions refer to
Environmental Protection Vol. 2-2. 23.0 .
- Ensure absolute cleanliness when working.
- Wear safety goggles and gloves when working with
refrigerant and nitrogen.
- Switch on existing ventilation systems.
- Use service station to discharge refrigerant circuit, only
then open screw connections and replace malfunctioning
components.
- Use caps to seal off opened assemblies and hoses to
prevent ingress of moisture and dirt.
- Make exclusive use of tools and materials intended for
refrigerant R134a.
- Re-seal opened refrigerant oil vessels to guard against
moisture.
- Flush refrigerant circuit with compressed air and nitrogen
if:
- Moisture or dirt has penetrated into refrigerant circuit (e.g.
following an accident)
- Refrigerant oil is dark and viscous.
- There is too much refrigerant oil in the refrigerant circuit
after compressor replacement.
- The A/C compressor had to be replaced on account of
"internal" damage (e.g. noise or no output).
In vehicles with A/C compressor without A/C clutch:
Note:
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13/2/2005