Refrigerant System Evacuation

Refrigerant System Evacuation

NOTE: Mazda Motor Company recommends use of an A/C service center to carry out recovery, evacuation and charging of the refrigerant system. If an A/C service center is not available, system recovery, evacuation, and charging may be accomplished using a separate vacuum pump, charging cylinder, and manifold gauge set.

1. Connect R-134a service center to the low and high pressure service gauge port valves.
2. Evacuate the system until the low pressure gauge reads at least 99.4 kPa (29.5 in-Hg) of vacuum and as close as 101.1 kPa (30 in-Hg) as possible. Continue to operate the vacuum pump for a minimum of 45 minutes.
3. Turn off the evacuation pump. Observe the low pressure gauge for five minutes to make sure that the system vacuum is held. If vacuum is not held for five minutes, leak test the system, service the leaks, and evacuate the system again.