Refrigerant Charging: Evacuation

WARNING: This page is about a different car, the 2004 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

Open all the valves of the manifold gauge.
CAUTION:
- Close the manifold gauge valve immediately after stopping the vacuum pump. If the valve is left open, the vacuum pump oil will flow back into the refrigeration cycle and cause a decrease in the efficiency of the air conditioner.
Start the vacuum pump and let it operate for 15 min.

Fig 1: Identifying Vacuum Pump Action
Courtesy of MAZDA MOTORS CORP.
Verify that high- and low-pressure side readings of the manifold gauge are at -101 kPa {-760 mmHg, -29.9 inHg}. Close each valve of the manifold gauge.

Fig 2: Verifying Manifold Gauge Readings & Closing All Valves
Courtesy of MAZDA MOTORS CORP.