So. My backplate was in fact a standard for the wiring, just not a standard for fitting to anyone elses programmers. I took a moment to double check and have for now lashed the Wiser box in. I'll have to rejig some things for permanence but didn't want to get too creative until I was happy it was all working. The confusing part is that there are 6 wires that go into the backplate (N, L, 1,2,3,4). My system doesn't use 2 and it works
. So with that done easily the signup was painless.
For the valves I already had Drayton TRV4 valves, so I just needed to use the metal collar and the smaller black connector to attach the valves. Put the black bit inside the metal bit and then attach it to the valve. So it up as tight as you can and then when it comes to installing on the radiator do up the metal collar with the valve clocked say 20 degrees anti clockwise so that once the collar is done up you can crank the valve round to line up in an aesthetically pleasing fashion. If you over or under egg it just undo the collar to correct.
DO read the instructions on the app. You put the batteries in, turn the nob right for 2 secs, it pairs, then you install it and then turn the knob right for 2 secs for it to calibrate. The first 2 I did I skipped the last part but noticed by the time I'd done the 3rd, so just reset the valves and repaired them and then calibrated.
All 12 are now done and I have set some schedules up. It all works as it should it would appear so we'll see how we get on. Alexa is set up so she can ignore me as usual.
Right now I just have 1 room thermostat in the living room but I can see us getting a few more. I've already noticed some radiators coming on while others aren't because the schedule says it isn't needed.
To finish it up I'll have to disable the old thermostat which is currently just set to On so that the wiser can control everything.