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Pensotti gas conversion

jfplumr
jfplumr Member Posts: 13
in THE MAIN WALL
Today I converted a Pensotti BL5-125 from oil to natural gas. The listed input for this boiler is 177K. I am inputting 132K. My CO2 and O2 are right in the middle of specification but I am running .03" positive pressure over fire. Pressure at breech is .03" negative. This means the total loss through the boiler is .06". Is this normal and acceptable? I am concerned about running positive pressure over fire with a gas burner. The boiler is 5 years old and I don't think it had been cleaned until today. I thought I cleaned it very thoroughly but now I am wondering. Any ideas?

Comments

  • furnacefigher15
    furnacefigher15 Member Posts: 514
    You'd need to check

    with pensotti to be sure, but most gas power burners are rated to have positive pressure in the combustion chamber.



    The draft being -.03 is that up or downstream from the barometric relief damper?
  • Steamhead
    Steamhead Member Posts: 17,387
    Which gas burner

    did you use? 
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
  • jfplumr
    jfplumr Member Posts: 13
    gas burner

    Carlin ez-gas
  • Steamhead
    Steamhead Member Posts: 17,387
    Should be OK

    I believe that boiler was designed to run with a slight positive pressure over the fire. Check the I&O manual to be sure. The EZ-Gas and the Riello gas burners can fire positive-pressure boilers without difficulty, but the Midco burners cannot AFAIK.



    What were the rest of the combustion numbers?
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
This discussion has been closed.

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