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Leak Test

NOTE:

Only use a gauge set for refrigerant HFC-134a (R-134a).

Use a vacuum pump adapter which is equipped with a check valve to prevent the backflow of the vacuum pump oil.

WARNING When handling refrigerant (R-134a):

always wear eye protection.

do not let refrigerant get on your skin or in your eyes. If it does:

- do not rub your eyes or skin.

- splash large quantities of cool water into your eyes or on your skin.

- rush to a physician or hospital for immediate treatment. Do not attempt to treat it yourself.

keep refrigerant containers (cans of R-134a) stored below 40°C (104°F).

keep away from open flame. Refrigerant, although non-flammable, will produce poisonous gas if burned.

work in well-ventilated area. Refrigerant evaporates quickly, and can force all the air out of a small, enclosed area.

1. Close the evacuation valve (in case of two valve gauge: close the evacuation stop valve).

2. Open the cans.

3. Open the high pressure valve to charge the system to about 98 kPa (1.0 kgf/cm2, 14 psi), then close it.

NOTE: Close the low pressure valve.

4. Check the system for leaks using a leak detector proper to refrigerant R- 1 34a.

NOTE: Particularly check for leaks around the compressor, condenser, and receiver/dryer.

5. If you find any leaks, tighten the joint nuts and bolts to the specified torque.

6. Recheck the system for leaks using a leak detector.

8. After checking and repairing leaks, the system must be evacuated (see System Evacuation).