Wiring from a Sunvic TLM2253
I'm replacing a SUNVIC TLM2253 - but I can't work out what wire goes where on my Tado thermostat.
I have two wires going into the Sunvic, plus an earth lead to the casing of the Sunvic.
The help on the Tado app, suggests I need 3 and I don't have them in the positions they think I should.
Attached is a photo - but the grey wire does have some brown sleeving on the back view.
Its a three story house with 3 zones - I successfully installed Tado on the other two floors earlier in the year.
Any thoughts would be appreciated.