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:
Refrigerant Circuit, Converting R12 to R134a and Servicing
Note
The laws and regulations listed below are applicable in
Germany. Different or additional laws and regulations may apply
in other countries.
Addresses in other countries can be obtained from the
relevant au ...
Towing Recognition Control Module -J345
General Information
The Towing Recognition Control Module -J345- recognizes
“trailer mode” when there is a power decrease of at least 5 W
→ Note and transmits this information to various control
modules via the CAN data bu ...
Unlocking the selector lever lock manually
Fig. 159 Removing the cover of the
gearshift gate (left-hand drive) The controls are mirrored in right-hand drive
vehicles
Fig. 160 Unlocking the selector
lever lock manually
First read and observe the introductory
information and safety warnings
If the power fails in the vehicle (for ...
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Safety Precautions
Welding and Soldering on Refrigeration Systems