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Weil-Mclain WGO-3, Oil to Gas Conversion Burner?

Ross_24Ross_24 Member Posts: 82
I have a client interested in an oil to gas conversion.

Their boiler is current an oil-fired, Weil-Mclain WGO-3 from 2008.

Weil-Mclain has not tested nor recommends any specific gas burners for conversion.

I'm assuming they're looking at a boiler replacement as the only option?


  • Tim McElwainTim McElwain Member Posts: 4,357
    Good application for a

    power gas conversion burner.
  • Ross_24Ross_24 Member Posts: 82
    edited September 2014
    What burner

    Would you recommend for this unit?
  • SteamheadSteamhead Member Posts: 13,767
    Several of us

    have gotten good results with the Carlin EZ-Gas. It is available with several different diffusers (heads), the 9-slot one is the best choice for this boiler. 
    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.
  • Tim McElwainTim McElwain Member Posts: 4,357
    The new

    Carlin EZ Gas Pro is also a good choice.
  • Paul48Paul48 Member Posts: 4,492

    the heatloss. You may be able to dial things in perfectly with the proper orifice.
  • j a_2j a_2 Member Posts: 1,796

    Read the conversion gun of choice manual front to back, before making your choice…Carlin, for one offers great reading material,they will gladly send it to you…If that boiler has not been serviced/cleaned annually….I would replace it...
  • icesailoricesailor Member Posts: 7,265
    Clean Servicing:

    Just because a boiler has been cleaned and serviced annually, doesn't make it clean.

    But that boiler can be cleaned to like new conditions if someone cares to do it properly. Which includes swinging the front open, removing the rug, and running a beater screwdriver up from the chamber side to get all the kibbles and bits down and out. Best done with a fluorescent light in the chamber and scraping the crud down. You know it's going to be bad because it is a cold start. If you choose to do it, replace the door and bonnet gaskets with new rope seals. I don't know the thinking on this (I'd do it) but replace the "rug" with a thicker Lynn "Wet Blanket" piece of wet refractory. It reflects heat back into the flame and cuts down on condensation from cold flames on cold starts.  Replace the door and bonnet gaskets with Lynn refractory rope, held in place with High Temp. RTV. Make it as air tight as possible.

    People don't like Pin Boilers because they are too lazy to clean them properly. They don't clean 3-pass boilers properly either, why do you think they would do a better job on Pin Type.
  • HenryHenry Member Posts: 963

    We will not install a conversion burner. According to our code, it needs to be certified on site. BTW, it will not give one, more economy over a condensing boiler! A chimney liner will not be required and plastic venting and direct combustion air will improve economy.
  • SteamheadSteamhead Member Posts: 13,767
    edited September 2014
    Here we go again

    it was only a matter of time.......

    Henry, the EZ-Gas Pro is listed as a conversion burner. That's enough for most AHJs. If you won't install a listed conversion burner, someone else will. End of story.

    And the thermal efficiency of a good wet-base/power burner boiler is good enough, when combined with the longevity of cast-iron it makes your super-expensive mod-con installations appear to be rather poor values, especially considering all the changes to the building that are sometimes needed to vent a mod-con's combustion products properly.

    Remember, we're still in a recession, which means fewer people have the discretionary income to rip everything out and put in all new, no matter how hard you push them.
    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.
  • FizzFizz Member Posts: 522
    W-M SGO-6 Conversion in Dec/2011

    We converted an 11 yr old a W-M SGO-6 in Dec, 2011, and went with a Wayne PF250-AF, which, btw W-M directed me to Wayne, though they didn't specifically recommend a conversion.  My boiler had a 1.75 gph nozzle, and per Wayne manual a firing rate of 240K was recommended.  Well initiially we fired to connected load of radiation, which was 156K.  This was insufficient, so we refired to 186K with great results!  It was dumb luck as our boiler was over=sized originally, but I checked W-M next lower rated boiler, the SGO-5  which was still more than needed BTU's, with recommended fire rate of 203K.  We calculated at about 10% less than last figure, which was stll slightly higher, but withing alloted downfiring of SGO-6 capacity.  Dumb luck!!!  Any way, I am very pleased with results, saving thousands of $ over last 3 yrs v oil, and the heat is very comfortable, now that we're firing at a rate close to connected load.  I know all conversions are done on boiler by  boiler basis and that is wise, an SGO-3 may not be good fit for Wayne, just relating my experience.  If follow advice of these steam gurus, you will be in steam heaven!  Good luck.
  • j a_2j a_2 Member Posts: 1,796
    will it

    Will it work ? site unseen, i guess so

    is it legal ? Check with the powers to be

    Is it cost effective ? Depends on way to many factors, here in the Boston area, definitely,not.
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