- Use the special draining and repressurizing equipment.

- Let the engine run with the air conditioning on for 10 - 15 minutes.

To improve safety the rapid connectors for the equipment connecting pipes have different diameters and are different colours: - larger and blue in colour for the low pressure side; - smaller and red in colour for the high pressure side.

1. Unscrew the plug protecting the needle valve on the high pressure pipe (HIGH).

2. Connect the fast-on valve, identified by its red colour, to the connector.

3. Unscrew the plug protecting the needle valve on the high pressure pipe (LOW).

4. Connect the fast-on valve, identified by its blue colour, to the connector.

Before fitting the connectors on the needle valves, move the knurled ring nut upwards.