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Beckett CF800 oil nozzle question
I don’t work on these too often. Much smaller than I am used to seeing. I have a customer with four Weil McLain 80 series sectional boilers with Beckett CF800s. Weil McLain spec’s the burners for 4.5gph Delavan type B 45 degree nozzles at 150 psi, which is also printed on the burner dataplate.
I just took over this property from another contractor and they replaced the nozzles with 4.00 gph 60 degree nozzles and were underfiring them down around 80 psi. According to the customer they claimed they couldn’t get the 45 degree nozzles to burn right.
I adjusted everything I could with the 60 degree nozzles and couldn’t get to zero smoke. On first inspection the diffusers and electrodes were sooted badly. Electrodes were right in the middle of the oil spray. I’ve got good combustion on them now, correct furnace pressure, draft, etc. 5.3% O2 with less than 10 CO, but still getting a #1 smoke.
I believe I should try putting the correct nozzles in and go from there. Is it common to have to move the electrodes further out when using a smaller spray angle?
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