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Posted by Amy on April 15, 2004 at 22:33:26:
In Reply to: Burner tripping when switching to high fire posted by James T on April 14, 2004 at 22:00:16:
: Have you ever tried physically standing at the burner front, and watching your actuating linkages...valve indicators....whatever you have that actually moves during this process? Being that you said this typically occurs after being in Low Fire for eight hours or more...I was wondering if something is binding or sticking. I had that happen before....the fuel part would stick, then it would slam open causing a flame failure just as you described. Nice to hear you are taking initiative to fix this problem...I believe you have to be smarter than your boiler to be a good engineer...wishing you luck...:)
: I have 4 seperate burners all with the same problem. Burner runs in low fire then switches to high fire when in high demand, then goes back to low fire when satisfied and so on. This is good. However, after demand is low for more than 8 hours or so (never switching into high fire) and then rises, the burner switches into high fire and trips out on flame failure when the high fire solenoid opens. This problem has been going on for more than 10 years now at our facility and when I ask other mechanics I get the "It's always been like that, can't be fixed" answer. Not acceptable. They are Webster JB-20 burners using JP-5 for fuel. All help is appreciated!