1, preparation before installation
1) Before starting, carefully check whether the electric pump is deformed or damaged during transportation, storage and installation, and whether the fastener is loose or falling off.
2) Check the cable for damage, breakage, etc. If there is damage, it needs to be replaced to avoid leakage.
3) Check that the power supply unit is safe and reliable, and the rated voltage must match the nameplate.
4) Check the cold insulation resistance of the stator winding of the motor with a megohmmeter to a value of not less than 50 megohms.
5) Check if the oil quantity in the oil chamber is suitable. When the unit is in the vertical position, the oil level should be flush with the oil filling port.
6) The submersible pump with cooling water hood must be installed with clean cold water and ensure that the drain is unblocked. The cooling water should flow from the lower side to the upper side.
2. Precautions After the pump is running normally, the power supply voltage, working current, pump flow and pump vibration should be observed at any time. If one of the following conditions occurs, stop the inspection immediately:
1) The operating current exceeds the rated current.
2) Under the rated head, the flow rate is reduced by more than 20% or the water is intermittently discharged.
3) The power supply voltage is too high or too low.
4) The pump has obvious vibration or noise
3, installation precautions
1) Electrical wiring: The electrical wiring shall be constructed by a formal electrician according to the circuit diagram. The insulation resistance shall be tested at any time during the installation. After the installation is completed, the insulation resistance of the motor shall not be less than 5 megohms. Lift the water pump, jog and observe the steering. Look at the pump clockwise from the direction of the motor. If the steering is not correct, replace any two joints of the three-phase power supply.
2) It is strictly forbidden to use the cable of the pump as the installation and hoisting rope to avoid danger.
3) The water pump should be submerged into the water vertically. It is not allowed to be placed horizontally and cannot be trapped in the sludge. When the pump moves, the power must be cut off.
4, storage precautions
1) After the electric pump is used for many times, it must be put into clean water for a few minutes to prevent deposits in the pump and ensure that the pump is clean.
2) When not in use for a long time, the electric pump should be taken out of the water to reduce the chance of moisture in the stator winding of the motor and increase the service life of the electric pump.
3) Under normal working conditions, after one year of working, the electric pump should be maintained, replaced with worn parts, checked for fastening condition, supplemented or replaced with bearing grease and insulating oil in the oil chamber to ensure electric pump Good operation.
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