1, open the electrical box, check all electrical components are intact, there is no loose moisture, remove debris.
2, check the motor rotation direction is correct, should conform to the direction of the arrows.
3, inspect the machine parts of bolts, the amount of nuts loose, observe the vacuum pump oil window, the vacuum oil is to achieve the oil marking.
4, connect the total power and ground.
5, shut down the cooling water valve, the hose joints are loose, and access to the tubing.
6, check the coarse filter, the fine filter is installed.
7, close all valves.