Axeman vesta boiler

Marilyn_4

Axeman boiler, vesta series. Becket burner



Puff back when I got to the job. replaced nozzle .65 60 A, Filter, strainer, New transformer, draft regulator.



Fire looks bad. Hits the back wall. Target wall looks cracked and red hot.

I can't get the fire to look good.



Can it be the wrong nozzle?

Does the chamber have to be replaced?

Steamhead

If that's the PVT-105B

with an F-head Beckett, the spec nozzle is a 0.75x80°B at 100 PSI. A 60°nozzle might produce the symptoms you found, even if it's an A rather than a B.



I'd raise the pump pressure to 150 PSI and use a 0.60x80°B nozzle. This will maintain the proper firing rate but burn cleaner. If the boiler is oversized, use this nozzle at 140 PSI for a slightly lower rate, but be sure the stack temp doesn't get too low. Make a label showing the nozzle size and pump pressure you used, and put it on the burner for the next person.



Also be sure the Z dimension is properly set.



And yes, replace the chamber. This is a dry-base steel boiler and a bad chamber can let the flame burn up the base. Then it'll be time for a new boiler.

Marilyn_4

Vest boiler

Thank you for your reply. I contacted Beckett. They recommended the lowest firing rate to be a .75 and the angle as 80B. Cleaned up the fire nicely. I kept the pump pressure at 100 per Beckett's instructions. 60 degree isn't right for this burner. Maybe that's what caused the puff back to begin with.



I don't know how the boiler was running. The electrodes, when I got them, were pointed down and not even near the nozzle. Not to mention the transformer was not working....well I guess it kicked on once to start the fire and puff back. I'm not sure if the draft regulator blew off or was never there.....



Thanks again,

Marilyn