Discharging vehicle system

To reduce the waiting time for the last operation described in the table, absorption of any coolant remaining in the system may be "forced" by pressing button (14) to activate the compressor and checking the vacuum level on the blue-coloured low pressure side pressure gauge. When absorption is complete, i.e. after waiting about ten minutes or pressing button (14) for a period of time, turn knobs of switch (7) and selector (6) to position 0 and close "REF" cock (10). At the end of the above operation, oil separated out from the recovered coolant inside the distiller may be observed via level gauge (A) and may be drained through fitting (B) after opening cock (C). If necessary, the same amount of clean antifreeze fluid may be added to the vehicle compressor in order to replace fluid absorbed by the device with the coolant.

DISCHARGING VEHICLE SYSTEM

Before charging, the vehicle air conditioning system must be discharged and restored to efficient operating conditions, i.e. after: - repairing any coolant leaks; - replacing any inefficient system parts.

To discharge the system, first fit quick-release fittings of hoses (12 and 13) of the Cleaner 134 device to system valves and then proceed as follows: - after ensuring that the vacuum pump contains the specified amount of oil without any impurities (see page 34) open cocks VAC (9) HIGH (11) LOW (8) and turn knob of function selector (6) to position 2; - the vacuum pump starts up and «PUMP» warning light (15) comes on. When low pressure pressure gauge (18) shows a vacuum reading, close VAC cock (9) and turn knob of function selector (6) to position 0; - check vehicle system seal for 5 minutes by checking that the vacuum level measured on the pressure gauge (18) does not drop; - if leaks are not found, open cock (9) again and turn knob of function selector (6) to position 2;

cock (REF) shown in the figure must stay closed