Volkswagen Golf Service & Repair Manual: Trade names and designations
| Refrigerant R134a is currently available under the following
trade designations: |
 Note
| Other trade designations may be used in other countries. |
| Among the large selection of various refrigerants, only this
one may be used for vehicles. The designations Frigen or Freon
are trade names. They apply also to refrigerants which must not
be used in vehicles. |
|
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Colour
Like water, the refrigerant is colourless both in the vapour state and the
liquid state. Gases are invisible. Only the boundary layer between gas and
liquid is visible. (Fluid level in indicator tube of charging cylinder for
bubbles in sight glass.) Liquid refrigerant R134a may appear coloured (milky) in
a sight glass. This cloudiness is caused by partially dissolved refrigerant oil
and does not indicate a fault.
In an enclosed container that is not completely full,
refrigerant evaporates as vapour at the surface in a quantity
sufficient to form an equilibrium between vapour a ...
Other materials:
Checking auxiliary air heater element - Z35- with auxiliary air heater
control unit - J604-, RHD vehicles
Checking
Special tools and workshop equipment
required
Vehicle diagnostic tester with current probe 100 A -VAS
5051B/7-
Test conditions
Intake temperature less th ...
Assembly overview - horn
1 -
Bracket
For horn
Removing and installing
→ Chapter
2 -
Bolt
Specified torque: 18 Nm
3 -
Nut
Specified torque: 9 Nm
4&nb ...
Detecting leaks
External damage can cause leaks in the refrigerant circuit. Because a small
leak will involve only small quantities of refrigerant, leaks should be checked
for using an electronic leak detector or by introducing a leak detection
additive to the refrigerant circuit. Electronic leak detectors ca ...
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Vapour pressure