Charging vehicle air conditioning system

• when pressure gauge (18) shows a vacuum reading of 10 mbar close cocks (8 - 9 - 11) and turn the function selector knob (6) to position 0.

After this operation, discharge the vehicle system.

Cocks (LOW-VAC) shown in figure must remain closed

CHARGING VEHICLE AIR CONDITIONING SYSTEM

To charge the vehicle air conditioning system, proceed as follows:

• keep the two device hoses connected to the vehicle system valves;
• read off coolant level in dispensing cylinder column and use scale underneath (on the cylinder itself) to obtain actual amount of fluid available (by reading values shown at the ends of the corresponding tilted line);
• check that the quantity of coolant to be added to the vehicle system is contained in the dispensing cylinder. Note the device stops automatically when the dispensing cylinder level reaches minimum;

• if the dispensing cylinder contains at least 2 - 2.5 kg of coolant, open cocks REF (10) and HIGH (11) and turn the knob of function switch (7) to position 2 and selector knob (6) to position 1 and check that cocks LOW (8) and VAC (9) are closed.

The difference between pressure inside the vehicle system lines and pressure inside the dispensing cylinder causes coolant to flow from the device through the red high pressure side hose to the vehicle system.

When the coolant level in the dispensing cylinder column reaches an established level, i.e. starting level minus amount corresponding to charge added to the vehicle system, turn knobs of switch (7) and selector (6) to position 0 and close cocks HIGH (11) and REF (10).

Before charging is complete, two situations may arise as follows: