Explosion sound Carlin 99FRD, Suntec a2va-7116

Ed. W.

Client hearing explosion sound, intermittent at start up. My guess oil is dripping in fire box after shut down. My diagnoses, put in a oil shut off solenoid. Any Ideas?

STEVEusaPA

Probably not it at all.
Why guess and sell the customer a part (wrong part), when you can go over there and properly test the proper components with the proper skills and tools like a professional?

Steamhead

First thing I'd look for is delayed ignition. But for the record, IMHO every burner should have at least a delay-on oil valve.

STEVEusaPA

Oh I agree with pre/post purge.
What if the unit hadn't been cleaned in years, or there's a turd ball on the end of the nozzle, bad pump cut-off, loose wire, bad ignitor...you know, the list goes on and on.

EBEBRATT-Ed

lack of oil flow, plugged filter, nozzle etc

Ed. W.

Filter changed, Nozzle changed, Boiler cleaned.

Jellis

draft checked? combustion analysis done? There is a reason for loud start, a oil delay valve is only a band aid, it may make the loud start go away but is not "the problem". did you test the fuel pump? whats the pump pressure and cutout?

HVACNUT

You say "your client", but are you his/her heating contractor? I only ask because you needed 2 sentences for a guess and a diagnosis. A real pro could've done it in one.

STEVEusaPA

I can’t tell if his last post means that’s what he did initially, or that’s what he did and the problem is solved.
But I do have all I need to know by his first post.

HotanCool

They all can't be Beckett AFGs. Need to learn them all!