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large orange mantel crown JSI 172

I have a large orange mantle burning on a crown JSI (steam) 172. It is natural gas there is about 10 burners and it is happening on all of them. the basement is well ventilated with pleanty of fresh air. It is connected to a b vent chimney. The manual says it should be pretty much all blue with some orange flecks in the mantle.

When the furnace first kicks on it fires in gas for about 3 seconds and then it wooshes up to a full flame.

any idea on what is happening here??


  • Tim McElwain
    Tim McElwain Member Posts: 4,482
    Did this just start?

    It is typical you will get some orange in the flame when it first fires up. The air rushing in to mix with the gas may have some dust particles from a person in front of the unit stirring up the dust with their feet. It should settle down to a soft blue flame not roaring or lifting.

    What is the make and model of the gas valve? It is probably from your description a step opening gas valve, it comes on at about .7 to.9 " W. C. pressure then about 10 seconds later it will go up to full input at about 3.5" W.C.

    If you are concerned about the quality of the combustion then you should do a combustion test with a combustion analyzer.
  • bennythepitbull
    bennythepitbull Member Posts: 37
    honeywell vr8200c-6008

    honeywell vr8200c-6008

    the mp is 3.5
  • Tim McElwain
    Tim McElwain Member Posts: 4,482
    Hi Benny yes that is

    a step opening gas valve the letter "C" after 8200 tells you that.
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