2. Lay a towel under the open end of the center hose.
3. Drain the refrigerant by slowly opening the high pressure valve.
Note. If the refrigerant is drained too quickly, the compressor oil may drain from the system.
4. Check for oil stains on the towel. If so, close the valve slightly.
5. When the pressure gauge reading falls below 0.35 MPa, slowly open the low pressure line valve.
6. Slowly open the valves of the high and low pressure lines until the pressure gauges show 0 MPa.