Volkswagen Polo Service & Repair Manual: Product Characteristics
| Refrigerants used in motor vehicle air conditioning systems
belong to the new generation of refrigerants based on
chlorine-free, partially fluorinated hydrocarbons (H-FKW,
R134a). |
| With regard to their physical properties, these are
refrigerants which have been liquefied under pressure. They are
subject to the regulations governing pressure vessels and use is
only to be made of approved and appropriately marked containers. |
| Compliance with specific conditions is required to ensure
safe and proper use. |
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Handling Refrigerant
WARNING
| There is a danger of ice-up. |
| The refrigerant can then escape as a fluid or vapor. |
| Do not open containers which store refrigerant. |
|
| If refrigerant vessels are opened, the contents may escape
in liquid or vapor form. This process is intensified the higher
the pressure in the vessel. |
| The pressure level is governed by two factors: |
| The type of refrigerant in the vessel. “The lower the
boiling point, the higher the pressure.” |
| The temperature level. “The higher the temperature, the
higher the pressure.” |
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Protective Eyewear
Put on protective goggles. They prevent refrigerant getting into the eyes, as
this could cause severe injury from exposure to cold.
Protective Gloves and Clothing
Greases and oils dissolve readily in refrigerants. They would therefore
destroy the protective layer of grease if allowed to come into contact with the
skin. Degreased skin is however sensitive to the cold and germs.
Fluid Refrigerant and Skin Precaution
The refrigerant draws heat for evaporation from the surrounding area. Even if
this is the skin. This may cause extremely low temperatures. Local frost bite
may result (boiling point of R134a: -26.5 °C (-15.7 °F) at ambient pressure).
Do Not Breath In Refrigerant Vapor
 Note
| If highly concentrated refrigerant vapor escapes, it mixes
with the surrounding air and displaces the oxygen necessary for
breathing. |
|
A burning cigarette can cause refrigerant to decompose. The resultant
substances are toxic and must not be inhaled.
General Safety Precautions
As per VBG 20, German industrial liability insurance
association.
Follow th ...
Before performing welding or soldering work on vehicles near
the air conditioning system components, extract the refrigerant
and remove the residue by flushing with c ...
Other materials:
Overview of the front passenger side
Fig. 9 Overview of the front passenger
side (left-hand drive vehicles). The controls are mirrored in right-hand drive
vehicles
Key for :
Vent
,
Location of front passenger front airbag
in the dash panel
Key-operated switch in the stowage
compartment for switch ...
Electric windows – functions
First read and observe the introductory information
and safety warnings
One-touch opening and closing
One-touch opening and closing makes it possible to fully open and close the windows.
The individual buttons do not have to be held down to do this.
For one-touch closing: pull the button for ...
Secondary Lock
The secondary lock is a housing securing mechanism (second
locking mechanism) that secures all wires in one contact
housing. If a secondary lock is installed at a contact housing,
it must always be opened or removed using specified tool before
releasing ...
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Safety Precautions
Welding and Soldering on Refrigeration Systems