I picked up this ancient boiler to hopefully heat my garage, and I haven't been able to find a manual for it. I have the plumbing part figured out, but I'm not sure about the electrical. I understand that the triple aquastat controls both the forced draft fan as well as the circulator pump, but I'm curious as to why it also has a regular aquastat on it. Does anyone have any info on this boiler or maybe have a manual laying around for it?