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circulator control

I have recently installed an old coal boiler in my garage to heat my house. It is connected to a Burnham boiler in my house basement. The coal boiler has an aquastat, a strap-on aquastat for a dump, and it's own circulator to push water 50' to the house. The Burnham has two circulators on one aquastat. I am bypassing my Burnham with valves, but I need to know how to get all three circulators running from the coal boiler aquastat and from the dumping aquastat. A 5 wire thermostat wire runs out to garage. Aquastat is a Honeywell L8124A,C, pumps are all Taco.
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