Do you think by using Low voltage option for 230V is safe to do? I do not want to burn the main board. I am going to remove the yellow link between terminal 1and 2 on the boiler and to connect it to 2 and 3 on Nest and connect Live and Neutral from the boiler to the Nest directly. I have Baxi manual round timer on the boiler which I am going to leave permanently on.I believe it should work. Would you agree?