Baseboard: No Bleeders/NO Isolation Valve
I am not sure what you mean but where the in/out copper comes out of and back thru the floor there are elbows. The pipe comes up runs thru the fins and then reverses back on itself and goes down at the same place in the floor. IT is a loop and is hooked on both sides. One supply and other return. No valves or bleeders. Only one purge valve at boiler for the whole thing. Sorry for repaeating, just want to be sure I am describing it clearly.
I have run a lot of water thru and have put pressure as high as I can so PRV goes off, I think I have all the air out of radiators but basebaords get barely warm while radiators are blast furnaces. IF I put bleeders on, do they go on the return side at the elbow at the highest point? Any other way to do it. This mixed setup has been this way for many years. I find it hard to believe there wasn't a way tog get the air out.