AIR CONDITIONER
U-29prose procedureEvacuation
Whenever the refrigeration system has been exposed to the atmosphere, it must be purged of moisture and air.
Evacuation
- 1Connect the manifold gauge set. (Refer to page U-28.)
05U0UX-047 - 2Connect the center hose of the gauge set to the vacuum pump inlet.
- 3Start the vacuum pump and open both manual valves.
- 4When the low-pressure gauge shows approximately 700 mmHg (27.6 inHg), close both manual valves and stop the vacuum pump.
05U0UX-095 - 5Verify that the pressure remains the same for 5 minutes or more. If the pressure changes, check the system for leaks, and repair as necessary.
- 6If no leak is found, start the vacuum pump once again and open both manual valves to obtain 760 mmHg (29.9 inHg).
- 7After the low-pressure gauge shows lower than 760 mmHg (29.9 inHg), continue evacuating for 20 minutes.
- 8Close both manual valves and stop the vacuum pump.
- 9Disconnect the hose from the vacuum pump.
Charging
- 1Close the high- and low-pressure manual valves fully after the system is evacuated.
05U0UX-097 - 2Install the refrigerant container service valve.
- 3Open the low-pressure manual valve to charge the system with refrigerant gas.When charging of the system becomes slow, run the engine at fast idle and operate the air conditioner.
NOTE
When charging of the system becomes slow, run the engine at fast idle and operate the air conditioner.
CAUTION
Be sure to keep the container in the upright position to prevent liquid refrigerant from being charged into the system through the suction side, possibly damaging the compressor.
Never open the high-pressure manual valve while charging the system with the A/C ON. Doing so may cause the refrigerant can to explode.