Really badly choked up boiler

[albatross]

I think you may have sorted it, just needs time to settle. It would struggle to light on diesel if at all.

 

[Killy Bing]

I think you may have sorted it, just needs time to settle. It would struggle to light on diesel if at all.

You would be amazed.
goes like slurey in the conny trap and secondery

 

[bright spark]

I presume it has 1 of those Riello RDB burner on it. This is gonna sound mad but on some models you know where you adjust the air, that's not the only air adjustment. If you take the burner out, there's a couple of screws holding the plastic casing on around the air louvre side with the air intake on the right hand side. If you remove the plastic cover to see the fan impeller there's actually another adjustment louvre. I only know this cos I got caught out with that before. So check that out, some Riello Burners have this. Check it out, it's worth a shot

 

[Best]

I presume it has 1 of those Riello RDB burner on it. This is gonna sound mad but on some models you know where you adjust the air, that's not the only air adjustment. If you take the burner out, there's a couple of screws holding the plastic casing on around the air louvre side with the air intake on the right hand side. If you remove the plastic cover to see the fan impeller there's actually another adjustment louvre. I only know this cos I got caught out with that before. So check that out, some Riello Burners have this. Check it out, it's worth a shot

Was thinking same, - the inner is a air adjustment which should be set, in theory, for the burners actual output.
The outer is for fine adjustment - normally all that needs adjusted hopefully.

 

[Killy Bing]

I presume it has 1 of those Riello RDB burner on it. This is gonna sound mad but on some models you know where you adjust the air, that's not the only air adjustment. If you take the burner out, there's a couple of screws holding the plastic casing on around the air louvre side with the air intake on the right hand side. If you remove the plastic cover to see the fan impeller there's actually another adjustment louvre. I only know this cos I got caught out with that before. So check that out, some Riello Burners have this. Check it out, it's worth a shot

Do you mean the louved disk you set round to your outputs?

 

[bright spark]

The 1 inside the air box under the 'snorkel'. If ye don't set that right, the outer air adjustment won't be able to greater change the CO2 levels. Maybe it was overlooked. Just thought I'd mention it incase it was missed

 

[Millsy 82]

Been Back out to it today to reset it. I whipped the baffles out again just to make sure they were not sooted up again. put FGA in it was running on 8.5% so set it all back running brilliantly now so was just the excess soot being burnt off causing the problem.

 

[WHPES]

I remember a mate of mine played a practical joke on his apprentice whereby he got the apprentice to go through the boiler servicing but tipped a bit of oil inside the combustion chamber when the apprentice went to the loo, and predictably enough the apprentice was unable to set up the boiler combustion for 20 minutes until the oil burnt off, with my mate saying "you must have done something wrong", then going off to snigger to himself.

On another occasion the guy was fitting a WC and the other lads on site kept tipping a little water behind the pan and telling him that the WC was leaking and he would need to take it off and refit it. This went on about 4 times before he realised someone was taking the P.