I am still trying to figure all this out.
I found this online. http://www.hearthnhome.com/downloads/in ... VF3000.pdf
. Page 15 shows a plumbing diagram.
I have found the c/w supply, the return, the recirc pump, the expansio tank, obviously the pr valve, the air scoop, what appear to be two thermastaically controled devices for two separate zones, and the temp/pressure gauge. I have not found an aquastat, or a tempering valve(or any other tie from the c/w supply to the domestic h/w).
What appeared to be the problem today was that the fire was getting too hot and heating the water in the boiler more than what the demand for water to the baseboard heaters and potable water were calling for. If I ran the hot water in the sink and turned up the thermostat the p/r valve would not open. It is plumbed to the outside so it was kind of cool to see it melt all the snow in the back yard though.
I had followed the steps in one of the threads about starting the coal fire in the boiler. Had it burning under coal in about 15 minutes. Had it filled to the top of the fire brick in about an hour and burning hot. Too hot I guess. Temperature gauge was reading about 260 degrees when the p/r valve went off each time. Problem was I had shut down the draft to nothing and the temperature just kept going up. The only thing that would stop it from blowing the p/r was turning up the t-stat and opening the domestic h/w.
The other thing I can not find anywhere is any type of damper. No manual or barodamper anywhere.
Is it possible that I made too big and hot of a fire? It took about 70lbs of coal to fill the firebox to the top of the firebrick.
Now when I look back, I guess I could have dumped the coals to kill the fire...but that wasn't what I wanted. I wanted it to work.