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Oil burner rumbling on start up and end

Marilyn_4 Member Posts: 26
Beckett burner with a L 1 air tabulator on the nozzle assembly.3 section Lennox boiler. 1 pipe top feed to burner.

It started as a normal yearly cleaning. Changed oil filter, A strainer, .75 70A nozzle. Removed smoke stack, vacuumed chimney and boiler.

Started her up fine. Upon shut off there was additional oil from nozzle that caused a rumble in the boiler and smoke pipe.

Took out the nozzle to check again and noticed the air tabulator was coming apart. Replaced it with a new L 1. Same thing...extra oil after shut off and rumbling.

Smoke test was clean. Draft over flame was -.02 breach -.04

I moved the nozzle assembly forward which stopped the extra oil and rumbling but then I had a bad smoke reading. Draft over flame was +.03 -.04 breach.

I'm going to call Beckett today to get the right settings.

Any ideas why this would be happening and what I can do to stop it before calling Beckett?




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