Identification of quality problems of hot water submersible pump several cases

Case 1:
  Due to failure to install according to the instructions required to fill the clean water and clean liquid, or did not put the steam hole open, resulting in false water level. Resulting in hot water submersible pump motor winding burned by the responsibility of the use or installation unit to be responsible.
  The phenomenon is: water invaded the location of the winding adhesion to one (the degree of adhesion can not help the same)
Case 2:
  Because the unit long-term unattended, there is no periodic clean wipe repair the circuit nodes, resulting in increased resistance wire blown fuse, protective measures to adjust and inappropriate or relay failure, resulting in phase loss, the responsibility of the burned winding by the user.
  Phenomenon: a hot water submersible pump unit can not start work, the motor insulation is zero. (If the motor power is large, the scene does not have to open the conditions, must return to the factory identification, the user can be assigned to participate in the identification of technical staff) Winding connection If there is a delta connection of which a winding Burned, the stars connected to the two-phase winding burned, which can be identified as lack of burned. Responsibility for this situation by the use of units to be responsible.
Case 3:
  The user according to the "instructions" requirements, in the one-year warranty period, after the open is due to mechanical wear and tear caused by motor damage, but because of the user's protective measures are sensitive, winding does not burn can continue to use, the factory is responsible for free maintenance Or replacement of mechanical parts, if the hot water submersible pump motor failure caused by mechanical failure of the winding, the user's protective measures do not work, the factory responsible for the maintenance but the cost of the burden of half of the maintenance.
Case 4:
  Hot water submersible pump motor rotor Broken shaft: rotor shaft and rotor silicon steel from: stator casing welding cracking: motor fastening screws loose, are manufacturing quality problems, the responsibility of the mountain manufacturer is responsible for. The solution is: manufacturers responsible for the replacement of new hot water submersible pumps and motors. (Note: the manufacturer is responsible for the replacement of the unit itself is not responsible for associated losses)
  Hot water submersible pump quality problem definition _ mainly from the material and performance of the hot water submersible pump quality requirements of the high hope of using a long life point, we should pay more attention to his material, like the stator height, silicon steel quality Cold rolling is better than cold rolling), the rotor shaft (good with stainless steel welding), as well as oil seals, which is very important for home use if the use of silicon carbide on the very good , Bearing is also very important, even if the brand is a human bearing, which is also divided into 369 and so on. You say the submersible pump, a relatively broad scope, at least talk about how much power, use of such information. Performance, then, you take the pump to test, look at his output power, head flow, speed load how, the same level of motor, high speed, light load.