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 printable version
The evacuation of air from the air conditioning system
 | If the refrigerant circuit was opened and it was in the air, it must be pumped out using a vacuum pump. After installing the air conditioning system is to be pumped for 15 minutes. Node, which opened for repair and maintenance must be evacuated within 30 minutes. |
| - The engine should be switched off.
- Connect the inlet tube pressure gauges to the compressor and close the valves of high and low pressure.
- Make sure that the refrigerant has been removed from the air conditioning system.
- Connect the central hose pressure gauges to the input of the vacuum pump.
- Run the vacuum pump and open the valves of high and low pressure.
- After 10 minutes, the vacuum must be equal to 94.39 kPa. If desired underpressure is not reached, the air conditioning system has a leak which must be eliminated in the following manner :.
- Close both valves and stop the vacuum pump ;.
- Charge air conditioning in about 0.4 kg of refrigerant;
- Check the tightness of the air conditioning system. Repair any leaks found;
- Re discharge the air conditioning system and evacuate it. If leaks are found, continue to pump out system.
 | - Run the vacuum pump.
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- Open both the discharge valve until the vacuum 94.39 kPa.
- After a low pressure manometer shows a vacuum which is close to 94.39 kPa continue pumping 15 minutes.
 | - After evacuation for 15 minutes, close the product valves and stop the vacuum pump. Disconnect the hose from the vacuum pump. The system is now charged.
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