Air Conditioning (A/C) System Evacuation And Charging

AIR CONDITIONING (A/C) SYSTEM EVACUATION AND CHARGING

Refrigerant System Evacuation Using an R-134a Refrigerant Management Machine

NOTE:Mazda recommends use of a R-134a Refrigerant Management Machine to carry out evacuation of the refrigerant system. If a R-134a Management Machine is not available, evacuation may be accomplished using a separate Vacuum Pump and R-134a Manifold Gauge Set.
NOTE:Leaks in refrigerant system service equipment, hoses or gauges can cause a leak that may be misinterpreted as a concern with the vehicle's refrigerant system. It is necessary to leak-test all refrigerant system service equipment, hoses and gauges on a weekly basis to verify that no leaks are present.
1. Connect a R-134a Refrigerant Management Machine to the low pressure and high pressure gauge port valves following the operating instructions provided by the equipment manufacturer.

2. Evacuate the system until the low-pressure gauge reads at least 99.4 kPa (29.5 in-Hg) of vacuum and as close to 101.1 kPa (30 in-Hg) as possible. Continue to operate the vacuum pump for a minimum of 45 minutes.

3. Turn off the vacuum pump. Observe the low-pressure gauge for 5 minutes to make sure that the system vacuum is held. If vacuum is not held for 5 minutes, leak test the system, repair the leak and evacuate the system again.

Refrigerant System Evacuation Using an R-134a Manifold Gauge Set and Automatic Refrigerant Charging Motor

NOTE:Mazda recommends use of a R-134a Refrigerant Management Machine to carry out evacuation of the refrigerant system. If a R-134a Management Machine is not available, evacuation may be accomplished using a separate Vacuum Pump and R-134a Manifold Gauge Set.
NOTE:Leaks in refrigerant system service equipment, hoses or gauges can cause a leak that may be misinterpreted as a concern with the vehicle's refrigerant system. It is necessary to leak-test all refrigerant system service equipment, hoses and gauges on a weekly basis to verify that no leaks are present.
1. Connect the R-134a manifold gauge set to the low-side and high-side gauge port valves.

2. Connect the center (yellow) hose from the R-134a manifold gauge set to the suction port on the vacuum pump.

3. Open all valves on the R-134a manifold gauge set and both gauge port valves.

4. Turn on the vacuum pump and evacuate the system until the low-pressure gauge reads at least 99.4 kPa (29.5 in-Hg) of vacuum and as close to 101.1 kPa (30 in-Hg) as possible. Continue to operate the vacuum pump for a minimum of 45 minutes.

5. Close the high-side and low-side valves on the R-134a manifold gauge set (not the gauge port valves) and turn off the vacuum pump.

6. Observe the low-pressure gauge for 5 minutes to make sure that the system vacuum is held. If vacuum is not held for 5 minutes, leak test the system, repair the leak and evacuate the system again.

Refrigerant System Charging Using an R-134a Refrigerant Management Machine

NOTE:Mazda recommends the use of a R-134a Refrigerant Management Machine to carry out charging of the refrigerant system. If an R-134a Refrigerant Management Machine is not available, refrigerant system charging may be accomplished using a separate Automatic Refrigerant Charging Meter and R-134a Manifold Gauge Set.
NOTE:Leaks in refrigerant system service equipment, hoses or gauges can cause a leak that may be misinterpreted as a concern with the vehicle's refrigerant system. It is necessary to leak-test all refrigerant system service equipment, hoses and gauges on a weekly basis to verify that no leaks are present.
1. Lubricate the refrigerant system with the correct amount of clean PAG oil. See Refrigerant Oil Adding.

2. Connect an R-134a Refrigerant Management Machine to the low-side and high-side gauge port valves following the operating instructions provided by the equipment manufacturer.

3. Set the refrigerant charge amount, and charge the refrigerant system following the instructions provided by the equipment manufacturer.

Refrigerant System Charging Using an R-134a Manifold Gauge Set and Automatic Refrigerant Charging Motor

NOTE:Mazda recommends the use of a R-134a Refrigerant Management Machine to carry out charging of the refrigerant system. If an R-134a Refrigerant Management Machine is not available, refrigerant system charging may be accomplished using a separate Automatic Refrigerant Charging Meter and R-134a Manifold Gauge Set.
NOTE:Leaks in refrigerant system service equipment, hoses or gauges can cause a leak that may be misinterpreted as a concern with the vehicle's refrigerant system. It is necessary to leak-test all refrigerant system service equipment, hoses and gauges on a weekly basis to verify that no leaks are present.
1. Lubricate the refrigerant system with the correct amount of clean PAG oil. See Refrigerant Oil Adding.

2. Assemble the R-134a manifold gauge set, automatic refrigerant charging meter and R-134a supply tank following the automatic refrigerant charging meter operating instructions.

3. Charge the refrigerant system following the automatic refrigerant charging meter operating instructions.

4. If the refrigerant flow stops before the refrigerant charge is complete, start the engine, select A/C operation and allow the refrigerant charge to complete.