Nothing will change at the boiler wiring terminals. It should remain exactly as it is.
Unfortunately there are so many ways to wire these systems up and installers don't all use the same wiring colours for the same thing, without knowing details of every wire and what is connected to it I can't be more specific. However one thing is certain, the boiler wiring doesn't need to be disturbed.
For the new motorised valve, the grey and orange wires will simply connect to the grey and orange wires of the existing motorised valve respectively. That will take care of the boiler control. Then the new valve is wired directly to the new Hive.
The new Hive N & L connect to the same 230V supply as the existing Hive.
Link Hive L to 1 Common.
Unfortunately there are so many ways to wire these systems up and installers don't all use the same wiring colours for the same thing, without knowing details of every wire and what is connected to it I can't be more specific. However one thing is certain, the boiler wiring doesn't need to be disturbed.
For the new motorised valve, the grey and orange wires will simply connect to the grey and orange wires of the existing motorised valve respectively. That will take care of the boiler control. Then the new valve is wired directly to the new Hive.
The new Hive N & L connect to the same 230V supply as the existing Hive.
Link Hive L to 1 Common.