It is a "GOOGLE NEST SMART THERMOSTAT & HOT WATER CONTROL SILVER" bought from Screwfix.That’s a no then. Who installed it? That’s really poor (contravenes energy efficiency legislation as well - if I can recall my college days correctly)
Have you bought the nest then?
I’ve never fit one, strictly hive here. Have you got any experience of wiring / running cables / mounting things to tiles etc?
Is it possible that it could be two zones, but i just dont know? I helped run the pipework and only remember it being done off one circuit. Dont remember pipes for downstairs CH and upstairs CH being independant. Am i right in thinking for it to be 2 zones there would be two pipe runs for the CH, up and down so Z1 & Z2?
That video seems straight forward.
It was acually the OH's 'Uncle' who did it. I did the labouring and some of the soldering and running of pipes. He just seemed to destroy everything and leave us with a cold water tap approx 2 foot from the floor for a few weeks.