Manual for Submersible Pump
The submersible pump works under water. It has a compact structure and light weight. It does not need a long drive shaft to pump water from the well. Therefore, submersible pumps are very suitable for rural well water irrigation, and QW submersible pumps are more commonly used. This kind of submersible pump adopts waterproof measures such as mechanical seal or air seal to keep the inside of the motor dry and free from water intrusion.
Pay attention to the following points when using:
(1) Check whether the vent hole, water drain hole, oil drain hole and the seal at the cable joint of the submersible pump are loose, and must be tightened if loose.
(2) Check the insulation resistance with a 500 volt shaker. It should be no less than 0.5 megohm. If it is lower than this value, open the water and air vents, and dry or dry.
(3) Check the cable of the submersible pump. If it is broken or broken, it should be replaced to avoid leakage.
(4) Before starting the submersible pump, check all circuits and switches to see if the wiring is correct and reliable, and then run idling on the ground for 3 to 5 minutes (the time should not be too long to avoid damage to parts or burn out the motor windings), and check the motor Whether the revolving direction is correct, and there is no problem with the above, it can be used in the water.
(5) When the submersible electric pump is used in the water, the cable must not be stressed, and the cable should be tied to the wooden frame at the wellhead. The maximum depth of the electric pump into the water is 3 meters, and the minimum depth is 0.5 meters (from the center of the impeller).
(6) During the operation of the submersible pump, the changes in the water level in the well should be frequently observed. The motor must not be exposed to the surface of the water or sink into the mud, so as not to affect the heat dissipation of the motor and burn the windings. As the water level in the well changes, the electric pump should be raised and lowered at any time. If the water volume is reduced or interrupted, the cause should be immediately identified or shut down for inspection. The cable should not rub against the well wall to prevent the well water from penetrating into the motor along the cable core after the cable is worn.
(7) For the new or renewed submersible pump with integrated sealing box, after 50 hours of use, check whether the seal is good, and then check once a month, and check whether the shield sleeve between the motor rotor and the stator is well sealed.
(8) After one year of use, the rust of the submersible pump should be checked and rust removed and painted. If the submersible electric pump is not used for a long time, it should be kept in a dry and ventilated house after careful inspection.
