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2008 - MX-5 - HVAC

REFRIGERANT CHARGING

WARNING:

CAUTION:

Charging Recycled R-134a Refrigerant

1. Connect an R-134a recovery/recycling/recharging device to the vehicle and follow the device manufacturer"s instructions.

Charging New R-134a Refrigerant

1. Install the manifold gauge set.
2. Connect the tap pin side of the charging hose to the air purge valve of the manifold gauge.

3. Connect the vacuum pump hose to the center joint of the manifold gauge.
4. Connect the vacuum pump hose to the vacuum pump.
5. Connect the charging hose to the refrigerant tank.
6. Place the refrigerant tank on the scale.
7. Open all the valves of the manifold gauge.

CAUTION:

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.
12. Open the valve of the refrigerant tank.
13. Weigh the refrigerant tank to charge the suitable amount of refrigerant.

WARNING:

14. Open the low‐pressure side valve of the manifold gauge.

15. When the high‐pressure side reading increases to 98 kPa {1.0 kgf/cm2, 14 psi}, close the low‐pressure side valve of the manifold gauge.

16. Inspect for leakage from the cooler pipe/hose connections using a gas leak tester.
17. Inspect for leakage again.

WARNING:

18. Open the low‐pressure side valve of the manifold gauge and charge with refrigerant until the weight of refrigerant tank has decreased 200 g {7.06 oz} from the amount in Step 13.

19. Close the low‐pressure side valve of the manifold gauge.

WARNING:

20. Start the engine and actuate the A/C compressor.
21. Open the low‐pressure side valve of the manifold gauge and charge with refrigerant until the weight of the refrigerant tank has decreased 450 g {15.9 oz} from the amount in Step 13.

22. Close the low‐pressure side valve of the manifold gauge and the valve of the refrigerant tank.
23. Stop the engine and A/C compressor.
24. Inspect for leakage using a gas leak tester.
25. Inspect for leakage again.
26. Remove the manifold gauge set.
27. Install the caps to the charging valves.



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