Evacuation and Charging

1. Prior to charging the refrigerant system, you must verify the purity of the refrigerant.

NOTE: Mazda Motor Company recommends use of a charging/recycling station to perform evacuation and charging of the refrigerant system. If a charging/recycling station is not available, system charging may be accomplished using a separate vacuum pump, charging cylinder, and manifold gauge set.

2. Make sure the manifold gauge set is connected as follows:
1. Low pressure hose connected to low pressure service port on the receiver/drier.
2. High pressure hose to high pressure service port on compressor discharge line at condenser core.

3. Evacuate the system until the low-pressure gauge reads at least 99.4 kPa (29.5 in-Hg) (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.
4. 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.
5. Properly oil match the system to verify that the correct amount of refrigerant oil is present in the system. Refer to REFRIGERANT OIL ADDITION.
6. Charge the system with the specified weight of refrigerant (887 kg (30 oz.)) and refrigerant oil.
7. When no more refrigerant is being drawn into the system, start the engine and select MAX A/C operation. Set the blower motor speed to maximum and allow the remaining refrigerant to be drawn into the system. Continue to add refrigerant into the system until the specified weight of R-134a has been added. Close the station cylinder valve and allow the system to pull any remaining refrigerant from the hose. When the suction pressure drops to approximately 207 kPa (30 psi), close the charging hose valve.