Oil Boiler - High CO Readings

feebeebos · 25 Sep 2006

Hi, Just serviced a Trianco TSO 125/1 and fitted a new nozzle, 1.00 x 60 H as per manu inst, pump press set up and flue has been swept but am getting very high CO readings of around 400 ppm with my TESTO 325, measured just below air diverter in flue, CO2 is around 11.2, efficiency and smoke are good, runs well with no CO reading inside room, just concerns me having that higher CO in flue.
Any one come across this sort of reading? Suggestions would be most appreciated. Thanks

Agile · 25 Sep 2006

What have you done to adjust the air supply?

What level of CO2 does the manufacturer suggest is to be expected under normal operating conditions?

When was the Testo last calibrated?

What colour is the flame?

Tony

cozzmic · 25 Sep 2006

With 400 ppm your looking at it sooting up, No more that 60-100ppm means realy clean 0-1 on smoke scale. As Agile says I would suspect the analyser if its out of calibration and if the other reading are Ok. Do you have access to an old wet tester. Handy if the analyser go jubbly bits up.

wilhelm · 25 Sep 2006

i aim for 10% co2 (13% with wine) open up the air a bit if youre not happy. or adjust oil press down a bit..obviously not below 100psi. when you set up boilers to 11% plus co2..it can be bordering on smoke.

i would tweak it down to 10% . to avoid the oil boiler mans worst nightmare.......2inches of soot in the heat exchanger .

doitall · 25 Sep 2006

I would check the nozzle is the right one first, then the flue/boiler for damp.

Fit the old one back in and compair the reading

chr15 · 25 Sep 2006

As Willhelm said, better off being slightly leaner on the CO2, I always aim for about .5 % lower than the MI states cos I hate getting soot up to me armpits.

wilhelm · 25 Sep 2006

valid point dia, the nozzle might need to be a 80deg angle . with that boiler you can actually see through the glass thing on the access plate . you can see the flame. i know they dont like solid cones. last one i did i fitted a w nozzle. im surprised you still had mi notes on site.

oilman · 25 Sep 2006

What happens when you adjust for minimum CO? What does the CO2 reading become? Is that an Inter burner? I find they are notorious for giving poor CO figures, and often swap them for something else as it's the easiest way to cure their problems, and thus cheaper for the customer.

Also is there any material inside the boiler than can give off gases as it gets hot?

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Oil Boiler - High CO Readings

feebeebos

Agile

cozzmic

wilhelm

doitall

chr15

wilhelm

oilman

DIYnot Local

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