I just thought of something in relation to the height of the system...The basement is 6 feet, then two 8 foor ceilings, but the farthest radiators on the 2nd floor aren't located on the ceiling..So I would say max height is 22 feet, most likely less. And remember I am running 20-25 psi @ 160-190 degrees.
I am going to keep an eye on the system over the holiday weekend. If it works like it did the past two days, I think I am going to be alright. If it doesn't, I will dump water until it gets down to about
5psi, then refill to make sure it gets back to 12psi to eliminate that issue as Gary suggested.
One thing that is sticking in my mind is the circulation pump. Mine is on the return line, and I observed yesterday when the sytem starts up the outbound pipes get hot, then the return pipes, then the outbound went cold, then the circ pump kicked on , then everything got really hot. Is this how the circ pump is supposed to work? Seems kind of inefficient.
Finally with my exp tank - it is directly over the boiler and I seriously doubt that there is any water in it. No one answered my question about the air connector on the bottom - is that to put air in the tank or to take it out? If so, what PSI should the tank be at? Thanks,
Bluesman