split loop diagram

HansK

I am looking for a diagram of a classic split loop system. We are having problems with getting part of the system heating again. We think it is where the old plumber tied the loops back together. We want to know if we need seperation in the tees on the return side or not. The system worked for years but now only 1/2 works. this problem is not as simple as we thought because all of the normal fixes didn't work and we are running out of seasoned plumbers to call. Someone please help us!    Thanks- Hans

Charlie from wmass

No I do not have diagrams, but

Here are two reasons the side does not heat. Air in the piping or lack of water flow. The systems I see had screw driver style balancing valves on one end or the other. Sometimes in the closets in the middle on opposite sides of the house. The circulator is working I am guessing. what has been changed so far?