Pellet Boiler incomplete burn

[Fisher 12345]

Looking for some help
I have a central boiler 225 pe pellet boiler just installed and it’s burning ok but the burnt pellets are turning in to charcoal not fully burnt

 

[tbear853]

I've had that with some pellet brands. I think damp pellets will do it too ... so I only buy small test quantities if not using my regular ones.

 

[Fisher 12345]

I've had that with some pellet brands. I think damp pellets will do it ... so I only buy small test quantities if not using my regular ones.

Ok thanks

 

[BansheeTwin350]

Looking for some help
I have a central boiler 225 pe pellet boiler just installed and it’s burning ok but the burnt pellets are turning in to charcoal not fully burnt

Check your air and fuel feed settings. I have the same boiler. The starting point is to have the feed and air setting set the same and then adjust accordingly from there. I find with most pellets, I run the air setting one setting higher than feed for the medium setting. On high I run air and fuel the same. If unburned pellets are reaching the end of the burn pot, you need more air. But don't go crazy with the air because the higher you run the air the more heat you push out the chimney.