Speedy Jim wrote:
Dave wrote:

Dave wrote:

Speedy Jim wrote:

Dave wrote:


Ok, I have a very strange scenario that I'm hoping someone here can
help me out with. I have a Beckett AFG that won't stay running. It
ignites perfectly, I've got good flame, but it shuts off about 20-30
seconds after running. So far, I've replaced the ignition transformer,
primary control, nozzle, electrodes, and oil pump. I have a friend who
works on commercial boilers who has been trying to help me and he can't
figure it out either. Does anyone have any ideas? Thanks in advance.


Put a pressure gauge on the pump.
Watch what happens as the thing shuts down.
IOW, is it loss of pressure causing the flame-out.
If it's single-pipe system, small air leaks can raise havoc.
Ditto for clogged line/filter/tank pickup.


Thats the wierd thing. Something is shutting it down. The flame is
strong and then you hear the primary control click and it shuts
everything off. If the oil was dropping off, I'd see the flame sputter
or go out right before shut down, which it doesn't. Its acting as if
the cad cell eye isn't seeing the flame, but its brand new.


If you don't mind the flack on here, bypass the primary
as a test to tell you whether the control is shutting
it off (sensing problem) or the flame is dying for
some other reason.



Also, if I hit the reset button before it shuts off, it will run
through a complete cycle.


Voltmeter on Cad cell to see if it begins to vary
when it trips out.

Cell not aimed at optimum point in fire?
I'm sure you've already done the basic cleaning, etc.

Measure line voltage to Primary.

Line voltage to the primary is fine. I'm thinking that maybe the cad
cell isn't aimed at the fire. The opening in the plate between the
electrodes and nozzle is so small I can see this being an issue. I'll
try to realign it. I'll also try to put a voltmeter on the Cad. I'll
let you know the outcome.