A. Before starting the light centrifugal pump, the suction side isolation valve of the pump should be fully opened, while the discharge side isolation valve should be almost closed.
B. When starting a light centrifugal pump, let the pump exhaust by loosening the exhaust screw on the pump head until a steady liquid flow flows out of the exhaust hole, and then tighten the exhaust screw.
Note: The direction of exhaust holes, and to ensure that the outflow of liquid will not cause harm to people or motor or other parts of the damage. In hot water installations, special attention should be paid to the risk of scald caused by hot water. When the pipeline system is filled with liquid, open the isolation valve slowly until it is fully opened. When the pump pumps the liquid containing air, exhaust the pump regularly. In order to make the pump exhaust, the exhaust screw on the pump head should be loosened during operation.