flue gas analyzer low co2 reading is low

[Tad334]

Hello, I hope someone can help. I’ve got Kane 455 FGA, its been serviced and calibrated the problem is that CO2 level is 2.3, 3.5 at most I could get 4.5, instead of 9-11, co co2 ratios are fine 0.0004 0.0009, co are fine as well 17 to 25. Recently I sent it back for recalibration but they dint find anything wrong. Also I tested it on 3 different boilers. Can anyone tell what is going on, I assume I’m doing something wrong. Thanks

 

[lame plumber]

are you testing a nice new HE boiler or an old style bf boiler they are a bit different, re readings.

 

[Tad334]

are you testing a nice new HE boiler or an old style bf boiler they are a bit different, re readings.

ive tested mostly newish boilers, co2 still should be above 9

 

[lame plumber]

ive tested mostly newish boilers, co2 still should be above 9

borrow a mates analyser for comparison checks on same boiler

 

[Tad334]

borrow a mates analyser for comparison checks on same boiler

not that easy, my mate is quite far, thank you for advice anyway

 

[hammers4spanner]

whats ppm??

 

[Tad334]

[DLMURL]https://dl.dropboxusercontent.com/u/33209856/photo1.JPG[/DLMURL]
[DLMURL]https://dl.dropboxusercontent.com/u/33209856/photo2.JPG[/DLMURL]
these are two links

 

[lame plumber]

pop into your local college or assessment centre, theyll probably let you do a comparison.

 

[Tad334]

pop into your local college or assessment centre, theyll probably let you do a comparison.

r u saying that everything is fine?

 

[GrahamM]

What was exact make/model of boiler you tested last?

 

[Tad334]

potterton 80 he, before it was glow worm cx 24 boiler and co2 was 2.4

 

[Barry98]

Ppm parts per million get your post count upto ten quick and pm your gsr details to redsaw or gasman so we can get you off the main forums and in the gas section . Thread drifts off I may close it

 

[GrahamM]

The above are standard gas valved boilers where CO² is not a required parameter.

 

[lame plumber]

just do a check to see whether your readings are gross/net and your using gas setup and not pellets or lpg etc.

 

[Tad334]

The above are standard gas valved boilers where CO² is not a required parameter.

there was a problem with glow worm flexicom 24cx, co2 was around 3.5, can it be correct?

 

[GrahamM]

there was a problem with glow worm flexicom 24cx, co2 was around 3.5, can it be correct?

Is this not a standard gas valve boiler? Do the MI's give a CO² figure? If not ignore it!
If your ratio is good, burner pressure, gas rate ok then that is all that is required on these.

 

[Tad334]

Is this not a standard gas valve boiler? Do the MI's give a CO² figure? If not ignore it!
If your ratio is good, burner pressure, gas rate ok then that is all that is required on these.

MI: Burner % CO2 case on 9.3 nominal

 

[GrahamM]

My mistake. Got mixed up with the other standard burner Glowworm.
The Suprima HE does not require a CO² figure IIRC, so should be ignored.
As mentioned if you believe have a problem you need to get hold of another FGA and do side by side comparison.

 

[lame plumber]

Is this not a standard gas valve boiler? Do the MI's give a CO² figure? If not ignore it!
If your ratio is good, burner pressure, gas rate ok then that is all that is required on these.

the tech pages as you say are 9.3% co2 for a flexicom, if the setup was too moch lower your boiler would have been booming away if it worked at all! http://www.glow-worm.co.uk/stepone/data/downloads_sd/b6/00/00/flexicom-cx-instn.pdf


So as mentioned go through your analyser manual and check you have set it up ok in the first place, then try a comparison somewhere with another analyser to see the figures match or dont, then take it from there.

 

[Tad334]

Thank u for all your help

 

[SafeGasInstall]

where about are you ?

 

[Tad334]

where about are you ?

I'm in Croydon, London

 

[SafeGasInstall]

Matt aka mfgs from here is near you , pm him and ask if he could help you

 

[Tad334]

Thank u, I will pm him

 

[Millsy 82]

just do a check to see whether your readings are gross/net and your using gas setup and not pellets or lpg etc.

Been there done that took me ages to work out why the boiler wouldnt run correctly after I serviced it.