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:
Introduction
This chapter contains information on the following subjects:
→ Handling wheels and tyres
→ Rims
→ New wheels and tyres
→ Tyre pressure
→ Tread depth and wear indicators
→ Tyre damage
→ Spare wheel or temporary spare wheel
...
Driving in a fuel-efficient manner
Fig. 118 Fuel consumption in litres per
100 km at two different outside temperatures
First read and observe the introductory information
and safety warnings By adopting an economical driving style
and anticipating the traffic situation ahead, you can easily reduce fuel consumption
by 10- ...
Battery Charger -VAS5900- Maintenance Charging
Note
If the battery is discharged by an electrical consumer
during maintenance charging, the Battery Charger -VAS5900-
automatically supplies the appropriate charge.
Maintenance charging can be performed without time ...
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Safety Precautions
Welding and Soldering on Refrigeration Systems