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Burnham Series 2 - banging

combustion issue?


  • Terry Rx
    Terry Rx Member Posts: 1
    Burnham Series 2 boiler - banging

    I had my old boiler replaced, complete w/ circ pumps, expanaion tank, etc. and peripheral equ. a few months ago with a Burnham Series 2 (model 206xxx) My home has 3 zones and slab heat in the basement floor. The boiler bangs and thumps on start-up. Obvious conclusion was air in the system but exhaustive bleeding, installation of a loop (with shut off valve)and extra air scoop has not resolved the problem. The noise is coming from within the boiler itself, not the external piping. The installation contractor seems at a losss as to what to do next. Any thoughts?
  • kpc_9
    kpc_9 Member Posts: 11
    what temp....

    is the boiler running at? How is the radiant piped? What was in there for a boiler before the replacement? Any zone valves? Any picts? kpc
  • bill_97
    bill_97 Member Posts: 172
    How many bangs and thumps ?

    I think this unit comes with an isolation relay that might be directly mounted to the inner boiler jacket . Makes a good thumping noise on startup on a few we've installed in the past .
  • bob young
    bob young Member Posts: 2,177
    check direction of flow

    possible reversed flow with pump banging against zone valve
  • JohnNY
    JohnNY Member Posts: 3,226
    Contact John "JohnNY" Cataneo, NYC Master Plumber, Lic 1784
    Consulting & Troubleshooting
    Heating in NYC or NJ.
  • tim smith
    tim smith Member Posts: 2,738
    I would bet on backwards zone valve, Tim

This discussion has been closed.