1. Check the capacity of lubricating oil in the oil and gas separator and determine that the oil level in the oil level gauge is the best above the upper limit and lower limit.

2. Electrical wiring and grounding are completed and in compliance with safety standards.

3. The air supply pipeline is unwound, and all screw plugs and joints are tightened.

4. Check whether motor power supply, voltage and instrument panel indication are correct, and make sure the compressor starts unloaded.

5. Add about 0.5l of lubricating oil from the intake port and rotate several times or point several times to prevent oil loss and burning in the compressor during starting, and pay special attention to avoid foreign matter falling into the machine to avoid damage to the compressor.

6. Operate the valve according to the operation requirements of the process pipeline. The compressor exhaust valve should be in the open position.

7. When preparing to start, check whether the operator is in a safe position.