Volkswagen Passat 1995 Official Factory Repair Manual page 4106

A/C refrigerant system, notes
http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.HA01.87.1
Basics when working on A/C refrigerant
system R-134a
CAUTION!
Keep work area and all tools clean.
Use only tools, equipment and parts
specified for use with R-134a.
Always wear protectiveglasses and gloves
when working on A/C refrigerant system.
Switch on existing exhaust/ventilation
systems when working on the refrigerant
system.
Discharge A/C system before removing any
A/C refrigerant system component.
Always use an Underwriter's Laboratory (UL)
approved refrigerant recovery/
recycling/recharging unit such as Kent-
4
Moore ACR , or equivalent, whenever
discharging an R-134a A/C system.
Immediately plug openconnections on A/C
components to prevent dirt and moisture
contamination. Likewise, DO NOT remove
new component from packaging until ready
to install. Immediately tighten component
connections after installation.
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