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Giannoni heat exchangers

kev Member Posts: 98
Velocity Phantom boiler needs a new rear firewall. Wondering how it is attached to rear of chamber. I say Giannoni heat exchanger and thats an assumption for reference. Thanks for any help.


  • HomerJSmith
    HomerJSmith Member Posts: 2,307
    Doesn't look like it's fastened at all. The burner tube looks to keep it in place. You can check for a screw in the center of the refractory.
    JUGHNE Member Posts: 10,897
    Some have a very small Allen screw and washer holding them in place. If so I shot a little WD-40 to soak awhile and then a little turn tightening and untighten, I had to go back and forth several times in and out until it got loose.

    Then a large sharp tweezers to poke it near the top and walk it out......that might be all you need to do for this one.

    The one I removed was not in terrible shape and I just flipped it over to reinstall after cleaning.
  • clammy
    clammy Member Posts: 3,015
    I went to a class on them and when I asked they said you only need to cover when cleaning and removing wasn’t required . Personally when there’s a Allen I ll remove them I would see if it’s only held in place by the burner tube if so I would take it out to clean .you can see if a standard Allen key can make it behind the side to see if it will pop off . Peace and good luck clammy
    R.A. Calmbacher L.L.C. HVAC
    NJ Master HVAC Lic.
    Mahwah, NJ
    Specializing in steam and hydronic heating
    JUGHNE Member Posts: 10,897
    BTW, for me it was a metric Allen screw.....something you do not want to bugger up or twist off.
  • kev
    kev Member Posts: 98
    I don’t see a obvious screw. I’ll know better when I have the new part.