Cross Contamination in a Gas Flue

FTimon

https://www.dropbox.com/sc/e2t4mvzokm7cuef/AADZmqwkJ5y4n82HYHzrlAbWa

FTimon

ps it must be 25 posts to put up photos

FTimon

https://www.dropbox.com/sc/zhvko0ttclfpqp1/AABuA9uD6aRlABGiBYhF33V3a

full set of photos

Wearb

Post one that has both flues in the one photo

FTimon

The flues are 10 meters apart I can't get them in one photo

DGOBS

Boiler 1: Flue Gas Analysis "Co 5774 ppm Co2 12.8% Co/Co2 Ratio 0.450
Boiler 2: Flue Gas Analysis "Co 484 ppm Co2 12.9% Co/Co2 Ratio 0.0038

Has anyone tried adjusting these boilers? Co2% is very high even for LPG? (as stated below air is very low) Hi fire readings should be 10% Co2 (9.5% on low fire)
so way out.

First step is o have RGI carry out an air intake contamination test, air should not be below 20.6% in readings (ideally 20.9%) this will rule out cross contamination (or not) if readings show <20.6 and there is also Co2 and Co on same sample, then there is a flue issue.

If not and readings are >20.6% then the issue in the appliance, gas settings, combustion chamber seals, burner, etc, etc, all items require checking. The gas adjustment as per manufacturers instructions.

FTimon

O2 intake on boiler 1 19.5
O2 intake on boiler 2 16.1

hope plumber comes today

roy rodgers

Every thing is looking good in the pics anyways nothing out of the ordinary..

Because the air in take is reading way out I'd say the flues will need changing. Definitely won't cost 4k!!!

Keep us up dated with the next plumber.

Dtp1979

If the original installer used something oil based like wd40 on the flue rubbers then at this stage the rubbers could be rotting and allowing the cross contamination. It'd explain why both are failing at the same time. It can't be a coincidence.

FTimon

update. Next plumber kept me waiting. Now he says he is too busy. Got another but he says he does not replace flues but disconnect the boiler. He recomended someone and he wants a commission cert before he starts. I do not have one. RGI say cents were not needed In 2009 and ther would not be one. The contractor who installed it is gone out of businesses.

Any recommendations

roy rodgers

FTimon wrote: »

update. Next plumber kept me waiting. Now he says he is too busy. Got another but he says he does not replace flues but disconnect the boiler. He recomended someone and he wants a commission cert before he starts. I do not have one. RGI say cents were not needed In 2009 and ther would not be one. The contractor who installed it is gone out of businesses.

Any recommendations

What part of the world are you in.? One of us around here might be able to help

FTimon

Galway city

FTimon

Folks
Still without heat - have paid over 500 euro so far and no boilers working - Am i doing something wrong? Rang another two plumbers and they won't return calls.



Feargal

roy rodgers

FTimon wrote: »

Folks
Still without heat - have paid over 500 euro so far and no boilers working - Am i doing something wrong? Rang another two plumbers and they won't return calls.



Feargal

I feel for ya feargal. We can't the staff either here up in Dublin. Try the rgii Web site to see if there is local lads around.