Am I missing something here? The only thing we are using is the burner control and I'm getting some odd behavior it seems.
Bulb is seated correctly as far as I can tell and I actually have two of these units and both are doing the same thing. One is the original and the other is off the oil boiler, same models. The hi limit seems to have no effect, previously if it was stoking and I turned the hi limit down to the temperature the boiler was at it it would shut off stoker, not the case here. Just a simple example of what just happened, the hi is at 160 and the low at 140. Diff is set at 10.
The boiler is stoking and the temperature is up to 180? How is that? Turning the hi to any amount does not shut off the stoker. Water started pumping out (keep in mind the tstat and circulate are independent) water temperature dropped to 160 and it stopped stoking?
The only thing I can think of is the temperature gauge is above where the aquastat is, could it take that long to equalize?