Really badly choked up boiler

[Bunker]

What was the co?

 

[Millsy 82]

Smells very different also. Were the FGA readings any better with the snorkel removed?

.1% difference so nothing I wouldnt expect as the snorkel will restrict the amount of air going to it.

 

[Millsy 82]

CO was fine cant remember what it was and all paperwork is in the van down the road. I will get the readout out in the morning.

 

[Bunker]

If the CO was good, you must have done a beautiful clean then, should have been a surgeon.

 

[Millsy 82]

If the CO was good, you must have done a beautiful clean then, should have been a surgeon.

I couldnt be a surgeon I dont mind my own blood but others and I feel sick lol.

It was between 50 and 60 if I can remember right but I did leave it running for half hour before doing it. And I spent ages cleaning it as I always do so I hope it was a beautiful clean.

 

[Bunker]

Did you check the air box?

 

[Best]

Keep the oil pressure at 8 bar, disconnect the snorkel if any doubt about it or flue, check the air damper inside the burner is actually opening when you turn the Allen bolt - many can be broken on RDBs. Be sure to tighten new nozzle up fully. (easy to forget)
Unlikely, but you can have a faulty new nozzle putting loads oil out.
Co2 will be fairly decent if you removed 99% of soot. Smoke pump will show yellow reading when setting good, until all soot is gone after a day or 2.
Maybe not in your boiler, but look out for a mouse nest inside snorkel or a dead mouse inside burner or other debris - only takes a minuscule bit of fluff in the narrowest, smallest points of the burners air intake to blast tube to reduce air by large amount.

 

[Killy Bing]

As said check you have the right blast tube, the vortex can change how it burns.

 

[SimonG]

Badly sooted i normally drop out a baffle or some of the spirals or springs in the condensing heat exchanger and set it lean. Then back after a week and sort it properly.

 

[Best]

I also would put the air up a little to keep it on the safe side & let it clean itself out for a few days.
I still use a smoke pump just to reasure myself that it's not still running black.