Fig. 4: Identifying Manifold Valves Gauge Closed
Courtesy of MAZDA MOTORS CORP.
8. Start the vacuum pump and let it operate for
15 min
.
9. 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.
10. Stop the vacuum pump and wait for
5 min
.
11. Inspect the high- and low-pressure side readings of the manifold gauge.
If the reading has changed, inspect for leakage and then repeat from Step 7.
If the reading has not changed, go to next step.
12. Open the valve of the refrigerant tank.
13. Weigh the refrigerant tank to charge the suitable amount of refrigerant.
CAUTION:
Close the manifold gauge valve immediately after stopping the
vacuum pump. If the valve is left open, the vacuum pump oil will
back flow into the refrigeration cycle and cause a decrease in
the efficiency of the air conditioner.
2007 Mazda MX-5 Miata Sport
2007 HVAC Refrigerant System - MX-5 Miata
Microsoft
Thursday, July 09, 2009 2:26:29 PM
Page 5
© 2005 Mitchell Repair Information Company, LLC.