Volkswagen Golf Service & Repair Manual: Trade names and designations

Volkswagen Golf Service & Repair Manual / Air conditioning system with refrigerant R134a / General notes on air conditioning systems / Characteristics of refrigerant R134a / Trade names and designations

Refrigerant R134a is currently available under the following trade designations:

H-FKW 134a

SUVA 134a

KLEA 134a

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.

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.

Characteristics of refrigerant R134a

...

Vapour pressure

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:

Safety measures when working on vehicles with a Start/Stop system
Observe the following when working on vehicles with a Start/Stop system: WARNING Risk of injury due to automatic engine starting in vehicles with a Start/Stop system. ...

Safety precautions for working on vehicles with start-stop system
Risk of injury due to unexpected engine start In vehicles with activated Start/Stop system, the engine may start up unexpectedly. The status of the Start/Stop system is indicated by a message in the dash panel insert. – Deactivate Start/Stop syste ...

Overview of fitting locations- sound system, vehicles with Dynaudio sound system
On vehicles equipped with a Dynaudio sound system, high-quality Dynaudio loudspeakers can be found at standard fitting locations. The Dynaudio sound system can be identified by the lettering Dynaudio on front treble loudspeaker trims. A subwoofer install ...