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Oil to Gas conversion - Problem Low steam

“Up Graded” to a Carlin 201 gas gun with a 60 degree pattern. Problem it is not producing enough steam.

Upped the orifice size. The heat (btu’s) seems to be there, but I don’t think they are heating all the sections of the boiler evenly.

The boiler is a peerless ECT-06-300wu with a 20” depth. Too me it seems like the flame is not heating the sections even. Like it is only using 2-3 of the possible 5 sections to rise through.

The liner is in. I have asked the question of should I remove it?

Should I add some baffles to the sections to correct flow?

When it was fired by a Carlin 102crd oil gun the boiler system had been gone over. Balanced, cleaned (water jacket, pipes and fire box), reinsulated, new vents (adjusted to be balanced), moved vents to proper locations and heights, looked over everything.. Large 2 pipe system 5 mains.

Got a second degree in the “Art of Steam”. It was running great!

If you have run into this, I would appreciate the input on how to correct it.


  • SteamheadSteamhead Posts: 13,048Member
    1- Check the gas pressure, both incoming (before the regulator) and between the gas valves and orifice.

    The incoming pressure should not drop below 6" WC or so when the burner and all other appliances are on.

    The pressure at the orifice can vary on a power burner like this, but we usually start at 3.5" WC.

    Did you clock the meter to verify that enough gas is getting through?

    2- What are the combustion test results?
    All Steamed Up, Inc.
    "Reducing our country's energy consumption, one system at a time"
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Baltimore, MD (USA) and consulting anywhere.
  • EBEBRATT-EdEBEBRATT-Ed Posts: 5,855Member
    I have put several 201 gas burners in . There a really good burner.

    You need to drill the orifice to the correct size. Check the gas pressures as @Steamhead mentioned and adjust the burner with test instruments. Clock the gas meter

    The gas input should match the boiler maximum input rating or or not less than 80% of input if that will carry the load
  • Ridgid1Ridgid1 Posts: 2Member
    So, yes, yes, and yes.

    and just heard from Carlin who suggests going to a 9/16" orifice.
  • EBEBRATT-EdEBEBRATT-Ed Posts: 5,855Member
    Your#s look good. I wouldn't put the larger orfice in unless your seriously short of steam and only if your boiler is rated for it.

    You will lkley raise your stack temperature which will reduce efficiency a little
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