Click here to Find a Contractor in your area.
Welcome! Here are the website rules, as well as some tips for using this forum.

If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
Need to contact us? Visit https://heatinghelp.com/contact-us/.

Converting from propane to natural gas

giardina850giardina850 Posts: 5Member
I am converting a propane heater from propane to natural gas. The unit is 100,000 btu. The propane was 11 inch water column. The natural gas is max 7 inches water column . Changed gas valve no problem. I need to drill out the nozzle. Polished off one of the nozzle and found a number 55 on it. How do I know how big of a hole to drill nozzle out. Can some direct me to a chart that would show some options. I had a hard copy of one years ago, but its long gong. It’s not to often that I convert from propane gas to natural.

Comments

  • ZmanZman Posts: 5,255Member
    Here you go :)
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
  • STEVEusaPASTEVEusaPA Posts: 3,334Member
    edited November 5
    @Zman can’t seem to open the pdf.
    steve
  • ZmanZman Posts: 5,255Member
    Try it this way
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
  • ratioratio Posts: 2,105Member
    It's not downloading properly. What I got for the pdf link was a pdf, but the name was a file called 'Gas, no extension & note the single quote at the beginning. After I renamed it, it opened fine. The spreadsheet wouldn't download at all.

    Might be a Valillabox issue, @Erin Holohan Haskell?

  • ChrisJChrisJ Posts: 10,138Member
    Maybe it'll work this way
    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
  • ChrisJChrisJ Posts: 10,138Member
    Nope.
    All well, I tried. ;)
    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
  • giardina850giardina850 Posts: 5Member
    Thanks Zman.
    I successfully downloaded chart. Found the 55 for the nozzle. Then I go across to the proper pressure and I see number. How to I convert that number to a drill bit size?
  • ZmanZman Posts: 5,255Member
    edited November 5
    That orifice will supply 18,888 btu/hour with 11" propane,do you have 5 of them to add up to ~100,000?
    You then need to find the correct size orifice for the pressure you are running in natural gas. If your manifold pressure is 7" (definately check your actual pressure), a NO. 49 would be pretty close at 19,135.
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
  • STEVEusaPASTEVEusaPA Posts: 3,334Member
    edited November 5
    For some reason it's not recognizing it as a pdf, probably because it has put single quotes around it.
    But you can download it to your desktop, then right click and choose 'Open with' and choose Acrobat.
    The Excel file didn't open either. I sent a message off to Erin.
    Maybe it's a browser issue, not necessarily a website issue.
    steve
  • ZmanZman Posts: 5,255Member
    edited November 5
    Zman said:

    Try it this way

    Did this work with the xcel file.?
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
  • Erin Holohan HaskellErin Holohan Haskell Posts: 1,146Member, Moderator, Administrator
    Thanks for the heads up, guys. We're looking into it.
    President
    HeatingHelp.com
  • mattmia2mattmia2 Posts: 251Member
    Note that 7" is almost certainly the input. The manifold pressure will be much less and you will likely need to convert the manifold regulator as well.
  • Tim McElwainTim McElwain Posts: 4,281Member
    With 100,000 BTU's how many burners do you have? The outlet pressure from the gas valve on natural gas should be 3.5" W.C. Give me the number of burners and I will give you an orifice size.
  • Erin Holohan HaskellErin Holohan Haskell Posts: 1,146Member, Moderator, Administrator

    For some reason it's not recognizing it as a pdf, probably because it has put single quotes around it.
    But you can download it to your desktop, then right click and choose 'Open with' and choose Acrobat.
    The Excel file didn't open either. I sent a message off to Erin.
    Maybe it's a browser issue, not necessarily a website issue.

    After some tests, it looks like this is what's happening. I'm not sure what's going on with the file, but you have to choose what to open it with.
    President
    HeatingHelp.com
  • KC_JonesKC_Jones Posts: 4,182Member
    edited November 5
    When downloading the file it adds an apostrophe before and after the file name, if those are deleted from the file name it opens normally.

    Not sure where the apostrophe's came from, but that appears to be the issue.
    2014 Weil Mclain EG-40
    EcoSteam ES-20 Advanced Boiler Control
    Boiler pictures updated 2/21/15
    https://www.facebook.com/media/set/?set=a.10202744301871904.1073741828.1330391881&type=1&l=c34ad6ee78
  • JUGHNEJUGHNE Posts: 6,039Member
    I believe you said you changed the gas valve?
    It may be set for 3.5" WC output.

    If there is a pilot burner, that orifice may have to be changed also. IMO
  • giardina850giardina850 Posts: 5Member
    ok, thanks guys. I think I got this now. Good heads up on checking gas pressure on the new gas valve. I will check out.
  • Tim McElwainTim McElwain Posts: 4,281Member
    For the pilot you want an .018 size orifice. Again if you will give me the number of burners you have I will give you the orifice size for natural gas on the burners.
Sign In or Register to comment.

Welcome

It looks like you're new here. If you want to get involved, click one of these buttons!