① when the triangular belt drive is adopted, the main shaft of the power machine and the water pump must be parallel, and the pulley must be aligned, in which the center distance shall not be less than twice of the sum of the two pulley diameters. When the water pump and the power machine are connected, they should be equipped with a common chassis and adopt claw type elastic coupling. Pay attention to the concentricity of the main shaft of the power machine and the water pump shaft.

　　② the installation height of the water pump (based on the water surface of the suction tank) shall be 1-2m lower than the allowable vacuum height. The soil in the operation position shall be solid to prevent collapse or falling into the ground.

　　③ pay special attention to prevent air leakage during the installation of water inlet pipeline. The strainer should be completely submerged in the water with a depth of about 30 cm. Keep a certain distance from the bottom and wall of the tank to prevent the absorption of impurities and air such as mud and sand.

　　④ when laying the water outlet pipe, the hose shall avoid friction with stone, bark and other objects, avoid wheel rolling and pedestrian trampling, and shall not contact with the running parts. The hose should be rolled into a disc and moved without touching the ground. The hard pipes shall be disassembled into single sections for handling. It is forbidden to move multiple sections in combination to prevent abrasion and damage of pipes and joints. The pipes shall not be exposed to the sun or rain to prevent deformation or aging of plastic pipes.

　　⑤ support the spray frame on the ground, place the end face of the spray frame joint horizontally as far as possible to make the cough head rotate evenly, and then fix the spray frame. Install the nozzle on the spray rack, check whether the rotation of the nozzle is flexible, open the rocker arm to see whether its tightness is appropriate, and fill the rotating part with appropriate amount of oil. Then wipe and connect the quick connector.

　　⑥ before starting, check whether the rotation direction of the pump shaft is correct, whether the rotation is even, and whether there is jamming, abnormal sound and other abnormal phenomena.

　　⑦ before starting the centrifugal pump, fill the pump with water, and start it after filling the water inlet pipe and pump body