Black traces under pellet boiler exhaust duct

[Christophe]

What ? Doesn't a whale suck through its blowhole?

Do you prefer recesses or holes?

[gek]

Hello,

I haven't checked the slope yet, I'll do that.
For the height we must be around 2m, I will also check.

Here are the more precise photos of the bouzin.

Thank you for your help in any case.

[Christophe]

It's a sucker...

[sicetaitsimple]

I haven't checked the slope yet, I'll do that.

No need, it seems constructively planned:" The inner tube is offset, at the level of the nose, with a downward slope of 3° allowing the condensates to be led back towards
the combustion device. The geometry of the terminal allows the top to be recognized unambiguously.

Excerpt from the manufacturer's manual
https://damrexelprod.blob.core.windows. ... b5505c77b9

On the other hand, can be checked that indeed the "above recognized without ambiguity" is well installed "above"!

[Christophe]

I haven't checked the slope yet, I'll do that.

No need, it seems constructively planned:" The inner tube is offset, at the level of the nose, with a downward slope of 3° allowing the condensates to be led back towards
the combustion device. The geometry of the terminal allows the top to be recognized unambiguously.

Excerpt from the manufacturer's manual
https://damrexelprod.blob.core.windows. ... b5505c77b9

On the other hand, can be checked that indeed the "above recognized without ambiguity" is well installed "above"!

The model mounted is a Dualis but we don't know if it's the model made for horizontal installation (C13 and C33 are different models according to the instructions...)

Otherwise, I did a little test with my pellet boiler stove (classic flue, no suction cup): I glued the evacuation against the wall and downwards...

After only about 20 kg of burnt pellets I have this trace on the wall and a few mm of dust in the "bowl" in places...

20230208_144352.jpg (428.33 KB) Viewed times 1072

20230208_144456.jpg (197.56 KB) Viewed times 1072

[izentrop]

We see that condensation is flowing just at the connection with the smoke outlet "cap", perhaps too cooled if on the prevailing wind side.

In which case it is now prohibited on new housing...

The solution may be to seal the connection.

[Christophe]

Well seen the drop zizi!

I had zapped it! In addition there are 3 and thirty-two on the aspi side!

So it's probably the model that needs to be mounted vertically!

[sicetaitsimple]

Well seen the drop zizi!

I had zapped it! In addition there are 3 and thirty-two on the aspi side!

So it's probably the model that needs to be mounted vertically!

I do not think so. If it were to be mounted vertically, it would be covered with some kind of hat.
https://www.poujoulat.fr/fr/nos-solutio ... /dualis-ei

[Christophe]

Ben on the doc there are references c13 and c33 which are similar…the hat is perhaps an option of this one…if we don't have the exact reference difficult to say.

We don't know either, as you said, if it is oriented correctly...

In short, we know that the problem comes from condensates loaded with soot. So it's settled, isn't it?

[sicetaitsimple]

In short, we know that the problem comes from condensates loaded with soot. So it's settled, isn't it?

On the explanation of the phenomenon, I actually think that it is settled.
On the fact that perhaps the combustion is not optimized and that it could possibly produce less soot, I have no idea and the photos will not tell us.
There are only examples of similar installations which do not present the same defect which could help to see clearly.