Refrigerant Charging: Evacuation

WARNING: This page is about a different car, the 2016 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

Open all the valves of the manifold gauge.

Fig 1: Opening Manifold Gauge Valves
Courtesy of MAZDA MOTORS CORP.
Start the vacuum pump and let it operate for 15 min .
Verify that high- and low-pressure side readings of the manifold gauge are at -0.1 MPa {-1 kgf/cm ² , -15 psi} .
Stop the vacuum pump.
CAUTION:
- If the manifold gauge valves are left open, vacuum pump oil will backflow into the refrigeration cycle and cause the cooling performance to lower. After stopping the vacuum pump, close the manifold gauge valves immediately.
Close all the valves of the manifold gauge.

Fig 2: Closing Manifold Gauge Valves
Courtesy of MAZDA MOTORS CORP.
Wait for 5 min after stopping the vacuum pump, and perform an airtightness check for the refrigerant system. (See AIRTIGHTNESS CHECK .)