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alternative endurance flow switch

rayplumber
rayplumber Member Posts: 8
in THE MAIN WALL
I have replaced numerous flow switches on the EBP Endurances, the new and old style, and they fail again after a few years. I want to mount an exterior one, maybe a paddle type, and but have a hard time finding ones that have a max gpm of at least 5gpm. The switch would need to trip when the recirculating pump comes on also. Any suggestions other than continuing to use Larrs.

Comments

  • hot_rod
    hot_rod Member Posts: 23,378
    what fails?

    the actual switch, or are the paddles getting eroded away?
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Tom_133
    Tom_133 Member Posts: 910
    Great question Hot Rod

    Huge difference.



    I have a few of these units out there about 4-8 years in service and no switches all on public water. I am curious to know why this happening to you.
    Tom
    Montpelier Vt
  • Steve Whitbeck
    Steve Whitbeck Member Posts: 669
    switch

    Is that basically the same switch as the Trianco heatmaker  used?

    If it is - it really isn't a flow switch but a pressure differential switch.
  • rayplumber
    rayplumber Member Posts: 8
    Solution

    The older style flow switch used a "reed" style switch to close when the magnet went up under water pressure. I used a reed switch from an alarm door contact--had to whittle it down--to replace the factory one. I think the internal heat of the Endurance was too much for this electronic piece. I have also moved the whole flow set up outside of the boiler. Similar to what the newer ones do. Works now, so we'll see if location makes a difference. I also moved the pump outside the boiler on two of these boilers and haven't had call backs since. Thanks for the input!
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