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American standard 6b j5 boiler bad bleeder valve symptoms?

Jonathancook81
Jonathancook81 Member Posts: 2
edited December 19 in Radiant Heating

So after adding 2 fin tube base heaters, after bleeding off air from the work.

my bleeder valve now randomly opens and the bangs loudly and continually in quick suction, slowly fading away after a 60 to 90sec.

Pressure in boiler are around 20 and water temp is 130F.

Is there any reason this is anything but a bad bleeder valve?

Of have I thrown the whole thing out of wack

Video

https://drive.google.com/file/d/1Mnl3jISUMSb1Ce_awdcUigIvPDAc-Q_4/view?usp=drivesdk

Comments

  • HVACNUT
    HVACNUT Member Posts: 6,373

    Pics?

  • SuperTech
    SuperTech Member Posts: 2,458

    Bleeder valve? Are you referring to an automatic air vent or a coin vent that requires a key or screwdriver to bleed air manually? Either way both of them should be silent. Pictures would probably help us figure out what you have going on.

  • hot_rod
    hot_rod Member Posts: 23,507

    Or the pressure relief valve?

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
    mattmia2
  • Jonathancook81
    Jonathancook81 Member Posts: 2
    edited December 19

    Pressure relief valve

    Added a video original post cuz I caught it doing it

  • hot_rod
    hot_rod Member Posts: 23,507

    if the system has an autofill valve, turn that off. They tend to leak through and cause slow pressure increases, if they have not been used in a while

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • mattmia2
    mattmia2 Member Posts: 11,029

    what kind of expansion tank does it have? is it still at 20 psig when the relief valve opens? does the boiler also make dhw?

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 16,588

    The relief valve shouldn't open until 30 psi. I agree with @hot_rod ,if the auto fill PRV has not been used in a while it could leak by. Shut the manual valve and drain the boiler down to 15 psi and try that. Bleed the rads if they are not heating. If it is ok the prv could be bad. Also if you have a bladder type expansion tank you may want to remove it and check the air pressure it could also be bad. I5 psi of air in the tank is what you should have without any water pressure on the bladder.

    Jonathancook81

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