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  • Evan456
    Evan456 Posts: 37

    also expansion tank charge is good 12 psi. Was unscrewed from system and checked. I want to instal a couple of pressure gauges to drain ports next check, then bleed, and check again

  • Evan456
    Evan456 Posts: 37

    Hi guys, I just got back after a trip and have started working on the boiler again. I got the lower pump oriented correctly. Expansion tank was removed and verified working (and at right pressure). Installed three garden hose pressure gauges, one before the pump that is having troubles one after pump (before manifold loops) and one on return of manifold. When he changed pump must of lost some pressure, the boiler says at 11.4 psi, however all three gauges read 9 psi. When I run pump with that valve that’s causing issues partially closed, the first gauge before pump reads 9, gauge after pump reads 15psi, and gauage after loops reads 9psi. This is running just the pump (no heat). I also purchased a pump, and have more glycol here so I can attempt to purge it. Thanks for all the help so far, just figured I would submit more of what I’ve done recently.

  • Evan456
    Evan456 Posts: 37

    I don’t know if this video will help at all, but it’s a video with pump running valve partially closed, showing flow rates on manifold then I open valve fully (pump still running), and the flow gauges instantly stop indicating any flow.

    Boiler issue .zip

  • 109A_5
    109A_5 Posts: 4,759

    What happens if you reduce the flow of each loop individually ?

    image.png
    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
  • Steamhead
    Steamhead Posts: 19,007

    https://forum.heatinghelp.com/discussion/comment/1908228#Comment_1908228

    Sure the valve handle isn't in the wrong position on the shaft?

    Co-Founder, All Steamed Up, Inc.

    Semi-retired

    Baltimore, MD, USA

    GGross
  • Evan456
    Evan456 Posts: 37

    I can get all 4 loops virtually closed (via gauges) and they still show no flow if the valve directly after pump is fully open. Valve handle came pre installed, has stops so you can only rotate it 90 degrees, a month or so ago when plumber had pump off, it was bottomed out against stop and did not leak therefore i would think if I rotate 90 degrees into other stop that would be fully open?

  • Steamhead
    Steamhead Posts: 19,007

    https://forum.heatinghelp.com/discussion/comment/1908258#Comment_1908258

    You could tell for sure by removing the circ and looking into the flange.

    Co-Founder, All Steamed Up, Inc.

    Semi-retired

    Baltimore, MD, USA

  • Evan456
    Evan456 Posts: 37

    yeah, balanced manifold via a guide now I hear water trickling in returns, assuming air in lines meaning, gonna bleed it

  • Dave Carpentier
    Dave Carpentier Posts: 706

    Faulty check valve in floor circ port ? (or debris caught behind it)

    Or did you already verify that..

    30+ yrs in telecom outside plant.
    Currently in building maintenance.
  • Evan456
    Evan456 Posts: 37

    got the boiler fixed.

  • Brent H.
    Brent H. Posts: 188

    @Evan456
    Really, you’re going to leave everyone hanging? 😀

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