Volkswagen Polo Service & Repair Manual: Handling Pressure Vessels

Volkswagen Polo Service & Repair Manual / Refrrigerant R134a Servicing / A/C System, General Information / Safety Precautions / 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.

Do not throw vessels!

If dropped, the vessels could be so severely deformed that they rupture. The refrigerant evaporates immediately, liberating considerable force. Flying fragments of cylinders can cause severe injuries.

Valves may break off if cylinders are not properly transported. To protect the valves, cylinders are only to be transported with protective cap screwed on.

Never store in the vicinity of radiators.

High temperatures may occur next to radiators. High temperatures are also accompanied by high pressures and the maximum permissible vessel pressure may be exceeded.

Not Warming Above 50 °C (122 °F)

To avoid possible risk, pressure vessel regulations specify that vessels are not to be heated to in excess of 50 °C (122 °F).

Heating Warning

Do not heat with a naked flame under any circumstances. Localized overheating can cause structural changes in the vessel material, which then reduce its ability to withstand pressure. There is also a danger of refrigerant decomposition due to localized overheating.

Empty Containers

Empty refrigerant vessels must always be sealed to prevent the ingress of moisture. Moisture causes steel vessels to corrode. This weakens the vessel walls. In addition, rust particles entering into refrigeration systems from vessels will cause malfunctioning.

Welding and Soldering on Refrigeration Systems

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 ...

Extraction and Charging System Safety Regulations

Make sure the shut-off valves are closed before connecting the charging system to the air conditioning system. Make sure the process is finishe ...

Other materials:

Extraction System Group Classifications
At this time, A/C service units for extracting, cleaning and filling refrigerant for motor vehicle A/C systems are available from various manufacturers. Group 3: Mobile extraction and charging systems for filling c ...

What happens to vehicle occupants who have not fastened their seat belts
Fig. 47 An unbelted driver is thrown forwards Fig. 48 The unbelted rear passenger is thrown forwards, hitting the belted driver First read and observe the introductory information and safety warnings Many people believe that they can brace their weight with their hands in a minor collisi ...

Vibration, Vibration Control System
Expanded functions can be performed using Hunter RFT33VAG Road Force Touch™ Wheel Balancer -VAS6230B4- in addition to the previously known balancers. A special characteristic of this system is testing the radial force of wheel/tire dur ...