I recently purchased and moved into an old house. Sounds fun already right? So there is an oil boiler and a "homemade" indoor wood boiler in the boiler room. "Homemade" is in quotes because it was made by a local welder who is something of a small town legend. There are dozens of boilers made by this guy in the northern NY area according to a local heating professional. That being said, there is no manual or reference for this boiler.
Now, when the late owner of this house passed, his widow cut out EVERYTHING connecting the wood boiler to anything, and had a professional re-plumb the boiler room for the oil boiler only. Now, remember i said old house? The oil boiler consumed ~130 gallons of fuel oil in 2 weeks of weather in the teens. I NEED to get this wood boiler hooked back up, as i have plenty of standing deadwood on my 21 acre lot.
I want to set this up with the wood boiler as primary fuel, but so the oil boiler kicks on if the fire goes out at night or when we're out of the house. I have 3 circulators kicking around, the wood boiler with a blower attached to it (NO wiring remaining), and what appears to be an old standard (no diaphram) expansion tank in the rafters above the wood boiler. have the stove pipe to connect the wood boiler to the same chimney as the oil boiler for the winter, and will install its own stack per code in the summer.
Everything else required for this install i will have to purchase. Not being able to afford 3 more tanks of fuel for this winter, neither can i afford professional labor or expensive components. After extensive research and reading through a hydronic heating textbook, i think i have a solid plan down. But im unsure on a few things.
- What type of aquastat do i use for the wood boiler? A triple aquastat would work for the blower and circ but i want it to turn the blower off if the fire goes out...
- Will wiring the two thermostats in parallel to the relay for the distribution loop circ work?
- Is there anything im missing in this design?
- im confident in my ability to solder copper tube, have done wiring before but never with 24v switches, anything special i should know?
Im going to the local heating supply store next week to talk to a gentlmen there who can help me but im trying to get as much information as i can first. Thanks in advance for any help.
Also, please dont mind the junk in the picture, i obvioulsy know to clear everything out before starting any workl! :-P