Furnace cleaning

I asked my tech if he would use a probe and test Co in the flue to see if the unit is burning efficiently and adjust it if it isnt, he responded there isnt much you can do, they burn as they burn. It is a 20+ old lennox with pilot. Is he right, or uninformed and lazy. Unit is dirty.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Your unit would probably be pass fail on the CO. I would have it tested, serviced yearly. I would also purchase an CO alarm for the home.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
The HVAC tech who lives 3 doors down from me told me to use compressed air to get out the dust. It looks a lot better now.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Maybe I was not clear or do not understand. Efficiency is my issue, if a tech uses a Co probe-meter he can adjust the burners to their highest potential, my tech says No, it is the system. I just want it running at its potential , not 1-5% lower. It all adds up, fast. Replacement with a 94.5% will be looked at later after the numbers and bills are in. It goes to -20f here , Zone 5 . Condo is poorly insulated.
What should Co % be for optimun running on a 20-30 yr old Lennox upflow with pilot. If that is in fact the way to adjust and determine efficiency.
Im not doing the work , but trust facts and reasonable guidlines.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Dearest Mr. Ransley :) , Most burners of 20 years ago, are non adjustable ; whether they be the long ribbon type or short jet style burners. The best thing for efficiency on these types of applications, is to thoroughly clean the heat exchanger passages with a flue brush both from the bottom open end of the heat exchanger...AND from the top with the baffles removed. However, if it has an Lennox 'S' curve heat exchanger, it is impossible to run brushes thru it. Running a small brush thru the burners and cleaning the openings with same, is advisable too. Lastly, the temperature rise should be carefully checked and the blower speed adjusted accordingly . All of the above will aid in squeezing out a bit more efficiency.
Sure have missed out dialogues.
Dave Daves Heating and Cooling Inc. Illinois.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Post your licence...the one that the state of Illinois said was revoked due to an incompetence charge?? Care to explain that one Dave?
BTW..you are wrong here....as per normal.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

This is Turtle.
Ramsley is still looking for the answer in all the expert advise you just give out. You should learn to try to answer the question atleast one time and them explain the theory of HVAC to a poster.
TURTLE
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
http://www.ardice.com/Arts/Music/Bands_and_Artists/3/3_Doors_Down
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

He can adjust them, you cant....but you knew that.
Anyone with any training on gas can adjust them...unlike what Dave told you....that stupid dangerous moronic tard. The adjustment is not on the burners, but the valve itself.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

My lennox dealer told me to reduce the firing rate by turning the gas value about 1/2 way between pilot and 'on'. This reduced the gas consumption by 1/2 but I was since advised to leave it 'full on' as adjusting this way could soot up the Hx. I blasted the Hx and burners with compressed air then vacuumed it all up.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Atta boy, Dave!!!!
Sh*t! I do the same with all of my light switches and I have cut my electric bill in half!
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

value
then
No...thats not even close to what I was talking about...

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

This is Turtle.
Tring to adjust the CO coming out of the burner vent to try to get the max. effency out of it is kind a like adjusting a auto engine and your going to drive it at 5,000 feet above sea level and then also at sea level. There is no know perfect setting for the Oxygen / fuel mix for air intake temperature and moisture content will change everyday. You set it on a 30% RH and 70air being intaken and then when you have it running on a rainy day at 90% Rh and 30F air being taken into the burners. It will or may be worst than just setting blue flame and Gas pressure settings. Just set the natural gas pressure at 3.2 to 3.5 " wc and watch the blue flame to see that you have NO white or yellow flames in the burner cones and you setting it pretty close as settings go.
The worst CO reading on a furnace would be less than 400 ppm and the best would be at 100 ppm at best. By adjusting the CO content at the fire chamber vent would be only adjusting the 100 ppm to the 400 ppm on the furnace. You would not see a 5 cent's difference in the gas bill per month at best and you would have the service man charge you atleast 2 hours tring to set the ppm for the temperature and % Rh of that day and when it got cold. All the work would go out the window at different temperatures and % RH on the cold day. The Government has the 400 ppm as the top amount of CO that a furnace can put out and still be called good but any furnace that has a clear blue flame on the burners will have less than 400 ppm as furnaces go. There is only one gas furnace that I know of that does come close to the 400 ppm and meets the Government and Goodman standards is the Goodman GMP series between 1992 to the 2002 year models. They put out a burner replacement kit to drop this CO level to the 200 ppm level if you like to but charge you for it now.
So setting the burners with the CO content coming off the fire chamber is a waist of time and your money as to try to save any fuel or money on the cost to operate. Now it is good quick way to check it to see if you have a problem with the burners by getting a CO reading of less than 400 ppm. If you break over the 400 ppm like 900 or 1,500 ppm you need to check it out to see why. At the 600 ppm level or up you can waist a little money on fuel.
TURTLE
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Related Threads

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.