I just bought a new themostart to replace with the old one
I only have heating and the wiring diagram showing I have to connect one to R and one to W(heating relay)
The wire I have from the wall one is red and one is white which I don't know which one should I connect to the R and which one should I connect to the W

It's simple as that but I really need someone helping me on this
Dave

r=red w=white