Bruce_miranda,
One thing to note is that in the diagrams you posted, and I've seen this in a lot of the official schematics, the pump APPEARS to be controlled from the heating valves. It's not obvious that the connection between the junction box and the boiler is two way, and that the pump signal comes from the boiler, up to the junction box, and then back down to the pump.
In my versions I made it explicitly clear that the pump is controlled by the boiler. However, that control might (in fact, probably would) still be via the junction box.
I was just trying to make it more obvious how things actually work.
P.
One thing to note is that in the diagrams you posted, and I've seen this in a lot of the official schematics, the pump APPEARS to be controlled from the heating valves. It's not obvious that the connection between the junction box and the boiler is two way, and that the pump signal comes from the boiler, up to the junction box, and then back down to the pump.
In my versions I made it explicitly clear that the pump is controlled by the boiler. However, that control might (in fact, probably would) still be via the junction box.
I was just trying to make it more obvious how things actually work.
P.
Comment