Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A1 Sportback 2 ...
Air conditioner with refrigerant R134a - Edition 11.2018
♦ Observe specific instructions relating to workplaces where re‐
frigerants are handled ⇒ Audi-ServiceNet, HSO Environmen‐
tal Protection . These instructions must be posted at the
workplace.
2.11
Product properties
Refrigerants used in motor vehicle air conditioning systems be‐
long to the new generation of refrigerants based on chlorine-free,
partially fluorinated hydrocarbons (H-FKW, R134a; other names
may be used in other countries).
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 may only be used
in approved and appropriately marked containers.
Specific requirements must be observed to ensure safe and prop‐
er handling:
2.12
Handling refrigerant
If refrigerant vessels are opened, the contents may escape in liq‐
uid or vapour form. The higher the pressure in the vessel, the
more vigorous the process.
The pressure level is governed by two factors:
•
The type of refrigerant in the vessel. “Rule: The lower the boil‐
ing point, the higher the pressure.”
•
The temperature level. “Rule: The higher the temperature, the
higher the pressure.”
WARNING
♦ Risk of injury (frostbite).
♦ The refrigerant may escape as liquid or vapour.
♦ Do not open vessels containing refrigerant.
Wear safety goggles.
Put on safety goggles to prevent refrigerant getting into the eyes,
as this could cause severe injury through frostbite.
Wear protective gloves and apron.
Grease and oils dissolve readily in refrigerants. They would there‐
fore damage the protective layer of grease if allowed to come into
contact with the skin. Degreased skin is however sensitive to the
cold and germs.
Do not allow liquid refrigerant to come into contact with the skin
The refrigerant draws heat for evaporation from the surrounding
area - even if this is the skin. This may give rise to extremely low
temperatures and result in local frostbite (boiling point of R134a:
-26.5 °C at ambient pressure).
Do not inhale refrigerant vapours
If refrigerant vapour escapes in concentrated form, it mixes with
the surrounding air and displaces the oxygen necessary for
breathing.
Smoking is absolutely prohibited
A burning cigarette can cause refrigerant to decompose. The re‐
sultant substances are toxic and must not be inhaled.
16
Rep. gr.87 - Air conditioning system
English 
