wired tado to replace nest - UK combi boiler
looking for some assitance and guidance. i am in the UK and this is for a combi boiler.
i currently have an Alpha Evoke 33 boiler with a Nest. originally it had a standard wired dial type stat which was replaced with the nest.
the existing stat wiring was converted from high power (230/240v) to low power (5v) to allow the nest to use the wiring to power the nest stat.
i am now removing the nest and replacing with a wired tado stat (i already have it, just waiting to install it).
i'll probably get one fo the gas engineers from the company i work at to come out and remove the nest and wire up the tado, just looking for advice on what needs done to the wiring.
does it just need converted back to the way it was when the old dial stat was in place? (ie high powered 230/240v). supplied instructions seem a little vaugue.
i have attached images of the kit i mentioned.