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blockage?

mbu
mbu Member Posts: 2
edited March 17 in Strictly Steam

I have gas boiler, national radiator#0-4w input 100000btuh out put 80000 I have bled it replaced vales . Once the burner lights and temp starts climbing it starts making noise. Sounds like water flow is blocking . Pressure gage also starts bouncing. I have run a cleaner threw the system. I think it helped a little. Any ideas for me would be appreciated

Comments

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 17,415

    Water or steam?

  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 10,277
    edited March 17

    From your description of your problem, I can not tell if you have a hot water boiler or a steam boiler.  They are two completely different contraptions and operate on two completely different principles

    Can you post a photo of your boiler from far enough back so we can see the pipes that connect the boiler to the radiators?

    If it is a water system then you may have a blockage from air in the pipes, and have posted in the Strictly Steam column incorrectly

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

  • mbu
    mbu Member Posts: 2

    It is water

    Thanks Nick

  • mattmia2
    mattmia2 Member Posts: 12,047

    Is the circulator working? is the system air bound so it isn't circulating? Sounds like the water isn't circulating for some reason so it is boiling in little pockets in the boiler. Does it heat the house evenly? Are the emitters, baseboard, standing cast iron radiators, convectors, whatever they are getting hot far from the boiler?

  • Grallert
    Grallert Member Posts: 931

    You very well could have air somewhere. Air will block the flow of water through you system. Can you here the circulator? At what temperature do you start to here the noise and what temperature does the boiler get to?

    Miss Hall's School service mechanic, greenhouse manager, teacher, dog walker and designated driver

  • HVACNUT
    HVACNUT Member Posts: 6,652
    edited March 17

    Can you post some pics standing back a bit and from different angles?

    Its not gravity? There's a circulator? Do you know if the circulator is running?

    Are there bleeders on the emitters? Pics?

    mattmia2

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