Connect to air central air a manometer for pressure measurement.
Arrange a towel under the open end of the central hose.
Slowly open the valve of a high pressure and discharge air central air.
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At a fast discharge of a coolant from air central air, from system compressor oil can flow out. |
Check, whether there are on a towel oil spots. If it so, smoothly close the valve.
After pressure reduction in central air of air below 3,5 kg/cm2 open the valve of low pressure.
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Open valves of high and low pressure and slowly reduce pressure in air central air while the manometer will not show 0 kg/cm2.
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