So I've got the heating mostly sorted but the Zone valves are twisting me melon. They are from the TS to the manifolds and they have 5wires. This is 2 more than expected... We have Earth, Live, Neutral + Grey and Orange.
I'm suspecting that these are switched lives? used to make sure that the boiler / pump is stoked up before the valve opens. Given that the boiler is effectively seperate to the circuit (buffered via TS) and the Manifold controller runs the pumps then they just need a bridge between Grey and Orange and then we make the rest / hot or not as needed by the heatmiser controllers (which have LEN) for the zone valves.
Anyone care to comment?