Nest S Plan wiring into 2 port valves

[mitchellmoxo]

Hello,

Looking at the nest s plan wiring diagram, what does the BW wire stand for on the 2 port valves?

Thanks!

 

[ShaunCorbs]

That drawing is wrong

What set up do you have now ?

 

[mitchellmoxo]

New install mate I was going to follow the john ward diagrams on YouTube but obviously the nest takes place of the programmer and room stat.

 

[ShaunCorbs]

This is the one I use

 

[mitchellmoxo]

THANks think I found the same one but for a nest