Porsche 996 TT, Repair Manual

Page: 427 / 2099

87 03 Safety regulations when handling refrigerant
R134a
The refrigerant R 134a which is used is known as a safety refrigerant. This means that this refrigerant is
non−flammable, non−explosive, non−toxic, non−irritating, odorless and tasteless. Despite this, you should
still follow the points below:
WARNING
Danger of injury as a result of contact with liquid or gaseous refrigerants!
Wear rubber gloves to protect your hands! •
Treat affected skin in the same way as in the case of freezing. Rinse immediately with cold water and
then consult a physician! •
Wear safety goggles to protect your eyes! •
If refrigerant still gets in your eyes, consult a physician immediately!
•
CAUTION
Danger of fire due to the air−conditioning system heating up from sunlight shining into the vehicle or during
welding and soldering work!
When carrying out repairs on the air−conditioning system, the system must be emptied by suction and
the refrigerant must be purified. Chlorine−free refrigerants must also not be allowed to escape into the
atmosphere and must be disposed of correctly! •
Due to their chemical composition, different refrigerants must not be mixed with each other! This also
applies for smaller quantities! •
No welding, soldering or hot−air heating may take place on parts of the filled air−conditioning system
or in its immediate vicinity! •
Make sure that parts of the air−conditioning system do not heat up during welding or soldering work
on the vehicle! •
While drying after painting work, the temperature burden on the vehicle must not exceed two hours at
a maximum temperature of 80°C! •
Whether or not the system is filled with refrigerant, the heating causes a very strong overpressure
which can cause damage to the system or even lead to an explosion! •
R 134a is completely non−toxic at normal temperatures, but it decomposes upon contact with a flame
or at high temperatures! •
Refrigerant bottles must not be thrown and must not be subjected to direct sunlight or other heat
sources for an extended period when full! •
The maximum permissible temperature of a filled refrigerant bottle must not exceed 45 °C! •
996420, 996421, 996450, 996451, 996620, 996621, 996650, 996651, 996840, 996841
87 03 Safety regulations when handling refrigerant R134a 364