combustion analysis guidelines for boilers

Jim_61

I think these figures are a little off. In round figures, a 7.5% CO2 reading will give a corresponding O2 reading of 11% and excess air at 103% ... if you're talking # 2 oil.

Jim ...

Big Will

When checking a boiler

That you have no manufacturer spec. sheet for. What parameters do you look for. I am doing a safety check on a couple of commercial boilers that I have not seen before this morning.

tim smith

Regarding generic readings

On gas I am usually looking for a minimum of 7-7.5 CO2 and less than 50ppm CO.

Big Will

Thats the kind of thing I need.

Kinda on my own here. I had never even heard of a combustion analyzer until I started reading Dan's books about four years ago. I even worked at a union shop for some time and no one used it. Just the fact that it shows the efficiency of any gas burning anything is a great sales tool.

Brad White_198

Testo

has an on-line PDF guide available which has good background and theory. I think I attached the correct one, they have two similar documents, I think.

This is all general/generic and the boiler you are testing may have specific parameters of course.

Big Will

That apropreate

My analizer is a Testo. Thanks

Unknown

You want

net stack temperature between 350 to 550 degrees F, O2 above 4% typically between 5 to 7%, CO2 at 7.5 to 9.5%, excess air 25 to 50%, draft -.01 to -.03. Now with some commercial boilers things may be a little different depending on the boiers. Most of those companies if you call and speak to engineering will give you the requirements for their equipment.

I would suggest you also get some training to help you out. Give me a call at 401-437-0557 or e-mail me and I can direct you to some literature and/or training

Unknown

I am talking gas

not oil.

realolman

I can't

get the link to open... it says .pdf but it's some .cfm file which won't open. How did you open it?


Edited: in case someone else is having problems opening it, save the file and then change the extension from cfm to pdf and it will open in acrobat reader.... thanks Dave's plumbing and heating.