I have installed a new timer and I have replaced the 3 manual valves with Myson MPE 222s I have tested the valves and they are fine I now need to link the boiler to the system There are two extra wires - orange and grey. I have connected the positive wire from the boiler to either of these two remaining wires but the boiler does not come on when the valve is activated. Is there a time delay until the valve is fully open or how do I connect the boiler.
All help appreciated
All help appreciated