Hello. Looking at a single channel Hive set up (noted as for combi's).. Could this be installed in to a Y system, by leaving the existing programmer taking care of water schedule and just replacing the wall stat? Popping the existing programmers CH switch to permanent / on, then hooking up the existing 230v thermostats' cables as follows to the HIVE single channel receiver: Permanent Live to Live. Neutral to Neutral. Switched 230v (power out from the stat / call for heat?) to the "Heat On" terminal.. Would this work, or am i being utterly dumb? I hope it's doable, because finding a 230v smart stat setup that doesn't replace the programmer seems a tricky task and there seems no reason for this? Many Thanks Rob.