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Interpreting the new service tag..why no CO2 ?

Jack M
Jack M Member Posts: 213
edited December 2016 in Oil Heating
Why does the tag read O2 and not CO2 (as it has in the past)? I went with a new service tech for the boiler this year (new management at the old place allows 40 minutes for cleaning/servicing and that's not much time for this old boiler).
The new service tech said "the settings were way off" but I don't know what "way off" could mean or how this happened.
The new tag has a measurement for oxygen, not carbon dioxide. Is there a way to tell the CO2 levels?
New December 2016 tag:

Old last year's 2015 tag:

Comments

  • Info here.
    New England SteamWorks
    Service, Installation, & Restoration of Steam Heating Systems
    newenglandsteamworks.com
  • Zman
    Zman Member Posts: 7,372
    Combustion analyses equipment only measures CO and O2. It calculates CO2. I have never understood why manufactures harp on a number that no one is actually measuring.
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
  • Jack M
    Jack M Member Posts: 213
    edited December 2016
    From RI_SteamWorks' chart (below), the new lower 5.9% O2 for 2016 is an improvement over last year's 8.2% O2. The new (2016) CO2 (not measured) would now increase to 11% (roughly) from 10% CO2 in 2015. This might also mean less excess air? Stack temp is up a bit.

  • Zman
    Zman Member Posts: 7,372
    The real question that should be asked is, what is the CO and why is it not being recorded?
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
  • Jack M
    Jack M Member Posts: 213
    edited December 2016
    No, no measure of CO that I can see.
  • STEVEusaPA
    STEVEusaPA Member Posts: 5,777
    edited December 2016
    I don't like " -.06, -.01", I think your boiler's heat exchanger is still dirty/plugged, but the next year it looks better if they are negative readings.
    Also, I wonder if the tech is using a wet kit. I see hand written where there should be a printout.
    Would explain the no CO
    steve
  • Zman
    Zman Member Posts: 7,372
    It surely went up when he made the O2 go down. Is it still in spec? I would inquire...
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
  • Jack M
    Jack M Member Posts: 213
    edited December 2016
    This is an old low speed (1725 RPM) oil burner. I did notice that the tech had an electronic box (no printout). The heat exchanger was cleaned (he let me take a photo with my phone) , and the smoke pipe was removed and vac'd out (last year's 40 minute service did not include this effort) .
  • Steamhead
    Steamhead Member Posts: 15,504
    What model is the burner?
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting