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Beckett AFG question

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Fred Harwood
Fred Harwood Member Posts: 261
in THE MAIN WALL
Ran across almost identical fragile carbon wings on the F3 flame holders on Beckett AFG burners in V74T Burnham boilers. One had a 1 gph nozzle and the other .85 gph, both 80 degree B type. If anything, air settings were a bit rich, with perhaps less than .01 draft over the fire. All else seemed OK. This common?

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  • Unknown
    Unknown
    Fred

    To be honest, this has not been a complaint. The original parameters for the normal firing rate for the V74 with Beckett are as follows:

    F4 Head

    2-2/4" Static Disc

    1.10-80B Hago

    #10 Air Shutter

    #3 Air Band

    The parameters for the reduced firing rate or V74M Medium firing rate are as follows:

    F3 Head

    3-3/8" Static Disc

    .85-80B Hago

    #6 Air Shutter

    #0 Air Band

    If you are running F3 heads then it sounds as if these have been down-fired. Check to see what these are equipped with as I recall receiving calls from the field several years back where techs were going with the reduced firing rate without changing the static disc. Your over-fire draft should be in the negative range at about -.02". If you in fact are running positive then something is amiss regarding chimney draft or the boiler is plugged up a bit. Hope this helps.

    Glenn Stanton

    Burnham Hydronics
  • Fred Harwood
    Fred Harwood Member Posts: 261
    Beckett

    Thanks, Glenn. I have slightly increased the draft and throughly cleaned the boilers. No carbon yet, so I assume the problem on both was slight positive pressure due to low draft setting.
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