Ford Transit 2002 Owner's Manual page 1500

CAUTION: The air conditioning system must always be evacuated before charging.
6. WARNING: When recovering the
refrigerant do not allow it to enter the
atmosphere under any circumstances.
NOTE: When removing components of the air
conditioning system, calculate the residual
quantity of refrigerant oil.
For additional information, refer to
Refrigerant Oil Adding
Recover the refrigerant from the A/C system via
the low-pressure connection in accordance with
the refrigerant center manufacturer's
instructions.
7. CAUTIONS:
The A/C system must be evacuated for
about 30 minutes before recharging, to
ensure that it operates correctly.
If moisture was able to enter an open
system over an extended period (several
hours), install a new suction accumulator and
increase the evacuation time to 2-3 hours.
Evacuate the A/C system according to the
refrigerant center manufacturer's instructions.
NOTE: If an air conditioning system that was
8.
filled with refrigerant is being evacuated,
some refrigerant will still be in the refrigerant
oil in the compressor. This remaining
refrigerant may evaporate, causing a slight
increase in pressure during the leak test. The
system is leak-free, provided that this
pressure increase does not exceed 20 mbar
(2 kPa, 0.29 psi).
Perform the leak test.
1. For the leak test, close the hand valves on
the pressure gauge set, switch off the
refrigerant center vacuum pump and
observe the low pressure gauge.
2. Locate any leaks in the A/C refrigerant
circuit using a leak tester.
For additional information, refer to
Electronic Leak Detection
Fluorescent Dye Leak Detection
section.
9. Top up with refrigerant oil.
For additional information, refer to
Oil Adding in this section.
NOTE: Depending on the type of refrigerant
10.
center and the equipment (with or without
heated filling cylinder), the air conditioning
system is either charged with liquid via the
high-pressure connection or with gas through
the low-pressure connection.
NOTE: Charge quantity on sticker in engine
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in this section.
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in this
Refrigerant