Ever since installing my Solo 40 I have had it steam hammering when gets burning hot. I have tried to purge the air I don't know how many times, probably ten times with a high flow pump. Does anyone have a cut-away of the boiler, I mean the flow pattern internally. I have tried pumping from drain thru supply and return lines, I tried to configure it a bunch of ways I could possible imagine. I moved my air remover from my return line to the supply line. Any ideas would be appreciated.