I have a potterton 24he heatmax combi with no timer it is wired to a Boss therm BRT mrk 2 thermostat controller which has the standard 3 wires going into it L,N and Earth i'm looking to do a self install of the hive active heating as i can't get anyone round as they all seem to be busy. Can i use the existing wires from the Boss thermostat if not could you point me in the right direction
Many Thanks
Many Thanks