I have failed to comunicate, maybe my concern is misplaced in other peoples opinon.
The stack switch has three purposes.
#1. If the fire goes out mainly due to the coal hopper runing empty, the cool air in the stack shuts down the stoker and in turn the blower, preventing the heat in the seventy five gallons of water from going up the stack, and the blower pushing the fire up the auger full of dust into the coal hopper.
#2. If the shear pin fails, V-belt failure, the cool air in the stack shuts down the stoker and in turn the blower, preventing the air from going up the auger and having the fire follow it, to the coal hopper.
#3. If for some reason the fire goes out, snow in coal, cool air in the stack shuts down the stoker, prevents the boiler from filing with coal.
Several suggestions for a bypass of a snap/stack switch have been suggested, all required a manual resetting, as I see it when the stoker is off for one hour the cold snap/stack switch would prevent the stoker from starting, I can't manualy overide this every boiler cycle, and if the switch stays hot for one hour after the fire is out there is no point in having it.
Maybe my concerns are just completly missplaced, I understood these were standard equipment years ago, aparently not redily available now.
I will build somthing in a few months, probably somthing with a internal clock bypassing the snap/stack switch for the first fifteen minutes for every burn cycle.
Thank you all.
*Heaving ground is function of moisture content and how well the ground drains, under my house we decided it was gravely, other spots in the yard move.
*Septic tank is 1100 gallon per the modern designs, wraped with 3/8 pex, covered with duct tape, and foamed, there is a company in Fairbanks that foams
everything, foaming the tops of tanks is comon, foaming the whole tank is also done, some get heat tape wraped on them before the foam, I just try not to use elecrtricity that way, my tank only has 18 inches of cover due to high water table in summer.
Other unique features of this place are, no bulding code inspectors, no property taxes, difficult to get building loans due to shody construction.