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  1. Frankiek3
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    Virginia Grundfos circulator motor swap

    This is what I was told for the Alpha2 26-99, might be similar with the Alpha1 26-99: The Grundfos UPMXL 25-124 is currently used in Geo-flo...
    Post by: Frankiek3, Dec 30, 2022 in forum: Maintenance and Troubleshooting
  2. Frankiek3
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    Flow Center speed

    The three speed has a selector to set the pump speed. The speed isn't controlled from the heat pump. That being said, it is sometimes useful to...
    Post by: Frankiek3, Jul 23, 2022 in forum: Vertical and Horizontal Loops
  3. Frankiek3
    Post

    Michigan Bosch Closed Loop - Questions and Issues (operating cost, pump failure, loop pressure)

    FYI, the pressure in a pressurized loop is to ensure no negative pressure occurs when pumping. A vacuum can cause pump failure due to cavitation...
    Post by: Frankiek3, Feb 13, 2022 in forum: Maintenance and Troubleshooting
  4. Frankiek3
    Post

    West Virginia Desuperheater pump

    If you have shut-offs on both sides of the pump, they are for pump change outs. Draining the tank isn't necessary, since you already did it...
    Post by: Frankiek3, Feb 13, 2022 in forum: Maintenance and Troubleshooting
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