Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A1 Sportback 2 ...
Air conditioner with refrigerant R134a - Edition 11.2018
Welding and soldering on refrigeration systems
Before performing welding, brazing or soldering work on vehicles
in the vicinity of air conditioning system components, extract re‐
frigerant and remove any remaining refrigerant by blowing out
with nitrogen.
The products of refrigerant decomposition due to the effect of heat
are not only toxic, but may also have a highly corrosive effect on
pipes and system components. The principal substance is hydro‐
gen fluoride.
Pungent odour
A pungent odour indicates that the products of decomposition
mentioned above have already formed. Do NOT inhale these
substances, otherwise the respiratory tract, lungs and other or‐
gans could be damaged.
First aid
•
•
•
Following accidental contact with eyes or mucous mem‐
branes, immediately rinse with copious amounts of running
water and consult an eye specialist.
Following accidental contact with the skin, immediately re‐
move clothing affected and rinse skin with copious amounts of
water.
Following accidental inhalation of concentrated refrigerant va‐
pours, the person concerned must be taken immediately into
the open air. Call a doctor. Administer oxygen in the event of
breathing difficulties. If the person affected is having great dif‐
ficulty breathing or is not breathing at all, tilt back head and
administer artificial respiration.
⇒ “2.13 Handling pressure vessels”, page 17
2.13
Handling pressure vessels
Secure vessels to prevent them falling over.
Secure upright cylinders to stop them falling over and cylinders
lying flat to stop them rolling away.
Pressure vessels must never be thrown.
If dropped, the vessels could be so severely deformed that they
rupture. The refrigerant evaporates immediately, liberating con‐
siderable force. Flying fragments of cylinders can cause severe
injuries.
To protect the valves, cylinders may only be transported with the
protective cap screwed on.
Valves may break off if cylinders are not properly transported.
Never store in the vicinity of radiators.
High temperatures may occur in such areas. High temperatures
are also accompanied by high pressures and the maximum per‐
missible vessel pressure may be exceeded.
Do not heat to temperatures above 50 °C
To avoid possible risk, pressure vessel regulations specify that
vessels must not be heated to temperatures exceeding 50 °C.
Do not heat in an uncontrolled manner
Do NOT heat with a naked flame. Local overheating can cause
structural changes in the material of the vessel, which then reduce
its ability to withstand pressure. There is also a danger of refrig‐
erant decomposition due to localised overheating.
2. General information on air conditioning systems
17
English 
