Converting from propane to natural gas
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Here you go"If you can't explain it simply, you don't understand it well enough"
Albert Einstein1 -
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Try it this way"If you can't explain it simply, you don't understand it well enough"
Albert Einstein0 -
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?
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Maybe it'll work this way
Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.
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Nope.
All well, I tried.Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.
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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?0 -
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 Einstein0 -
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.
There was an error rendering this rich post.
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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.0
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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.STEVEusaPA said: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.President
HeatingHelp.com0 -
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.1 -
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. IMO0 -
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.0
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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.0
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I have a slant finn boiler 200000 btu plumbed for natural gas, and the book says LP kit is part number 81 7304 000 . Is the kit manufacturer specific or can I convert to another manufacturer such as a GE, with the same specs such as WB28X29962 3/8"
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Manufacturer specific unless the the ge is the same boiler rebranded. You also need someone with a combustion analyzer that knows how to use it to do it.
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all conversions require gas pipe sizing check. This is master gastfitter work. typically, natural gas requires a larger pipe size than propane to deliver the same BTUH. Pressure drop due to incorrect sizes will create problems. design size engineering required. If you did this, then it's all in the appliance controls and setup. combustion test required also. The life you save may be your own.
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Fuel conversions are not DIY projects. Let a pro do it. You do not drill out orifices- you buy the correct ones specified by the mfr. Also, some gas appliances require a different burner from LP-NG or air shutter adjustments.
The inlet gas pressure is not at best case but worst case with everything firing on high fire at once.
As Lance noted, you may have to convert to a 2-psi system in order to use the same piping. Again, contractor work. If you are a contractor, you should state so. The sizing charts are available both in the gas codes and from Anderson Forrester, who makes gauging drills.
Once you feel you're done you need to run combustion analysis to see if you need to tune it.
Some jurisdictions require a licensed pro to pull a permit and do this work.
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