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I have a couple of Honeywell 2 port motorised valves on my s plan system, one is a 5 wire and the other is a 6 wire. Both valves work ok so I don’t have an issue but I am a little confused as to why all the online s plan wiring guides I have seen show the grey wires going to live and the orange wires going to switched live on the boiler. The connection diagram on the 6 wire valve shows it the opposite way around!
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