Michigan new pump shortcyle

Discussion in 'Maintenance and Troubleshooting' started by learningguy, Oct 23, 2014.

  1. learningguy

    learningguy New Member

    I originally had a above ground pump that was pumping about 9 GPM into my 5 ton system. Now I have a submersible pump that is pumping 14GPM. Problem is the pump turns on for 5 seconds and shuts off. a minute or later does the same thing. Pump is hooked directly to the system as was the other one, when calling for heat, the old pump would turn on and run till there was no more need for heat or cooling. Is a bladder tank nescessary?
  2. engineer

    engineer Well-Known Member Industry Professional Forum Leader

    Why the increase from 9 to 14 GPM?
    Could you have used a smaller pump or different wet end?
    Is there a pressure switch? I'm guessing s...what is it set for
    A bladder tank would lengthen the cycles, but ideally the pump comes on and stays on whenever system is running

    Another option might be a speed controller (variable freq drive) on the pump

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