ignition

Jerry Boud

I just installed a two pipe oil feed and return. the burner
starts, runs for ten seconds the fire stops for five sec.
then resumes and finishes the heating cycle. Don't know if
the spark or the oil is the one that is causing it. I bled the pump. New transformer end of last heating season.
Bouds Stumped

brucewo1b

It sounds more like

air in the supply piping once the air passes it goes back to firing. Did you put the return in the tank so it is an inch or so above the supply? If not it can draw back air and get in the system.

Jerry Boud

Thanks for the comeback Bruce,The return is 3in. above the supply line.
Boud

brucewo1b

Then I would be looking for air

getting in at fittings, pressure or vaccum test the lines. I have had a couple of times pump strainer gaskets not tight or filter gaskets leaking

Jerry Boud

Bruce Stevens Thanks

Thanks Bruce, thats what it was. The gasket between the pump filter, and the pump. Thanks again

Jerry Boud

brucewo1b

Jerry Glad it worked out

and thanks for letting me know

Steve_35

Things to keep in mind.

Once the flame is lit, you don't need the spark any more.

With two pipe you're moving a LOT more oil. This causes higher vacuum because the more fluid you put through a pipe the more resistance there is to flow. Since one line is under vacuum the increased resistance causes higher vacuum. That can exacerbate any air leaks.

Filters need to be replaced more often because you're pumping the pump, not the nozzle.

Best bet is to install a Tiger Loop instead of a 2 pipe.