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Hi Chris, Thanks for your kindly reply. There is one thing I can not undertsand. Why they didn't connect the Netural (connection 2) to the old thermostat? From my undertanding is they didn't use the "Anticipator" as the heating system is Combi boiler? But why the combi boiler doesn't need the...

Hello, I am trying to replace an old Honeywell T6360 main wired thermostat with a volt-free smart thermostat. I have an worcester bosch greenstar 30i boiler The current thermostat is wired up as shown in attached photos. From my measurements and bolier digram, I believe the wires I have now...