Guys, this is the wiring, the new one at the top, the old T40 at the bottom with my R, Y, B showing the colours. Does this help? Can you see picture?
Thanks
Scott
I have just bought a Sunvic TLX7501 digital thermostat.
I am replacing an old Sunvic T40.
The T40 has 4 inputs R, Y, B and an earth.
The TLX7501 only needs a C (presume live) and a 1 and 2.
The leaflet says that an earth is not required.
Assuming I keep the live Red and put it to...