I have a wood fired gasifying boiler which has its own controller to control its own circulator, combustion air blower, etc. The boiler circulates heated water through a plate exchanger while the fire burns as needed. The boiler storage tank temperature is maintained between 160-180 degrees by operation of the blower. If the storage tank gets below 140 degrees then the circulator shuts down.
My house hydronic heat piping (the other side of the plate exchanger), has its own zones and circulators and domestic HW (Smart 80), which are controlled by the thermostats / zone controller.
I'd like to use a gas boiler (which also would have its own circulator and temperature limit controls) for freeze protection. I am thinking that I could use an aquastat at the wood boiler circulator supply / discharge to sense a low water temperature set point (100 degrees), to turn on the gas boiler until the tank reaches, say 130 degrees.
Q1) Can I use a Honeywell 6006C (Home Depot stock) and wire it like the attached drawing shows (bottom of sheet) to accomplish this?
Q2) How would the differential setting on the aquastat (adjustable from 5-30 degrees) work?
Thank you in advance, I sincerely appreciate the help. |