Help with Nest E Heat Link Wiring

[markmsl]

Morning all

I'm walking through moving to a nest e from a neomitis and I was hoping someone could let me know if I've made the right assumptions about the wiring please? On the photos below am I right in thinking I need the brown live as the C wire on the nest and the black as the NO?

 

[flameport]

Black and grey.

Blue and brown are 230V AC that the nest-e doesn't need as it's battery operated.

 

[markmsl]

Brill, thank you. Do the blue and brown need to go in the same clip to terminate them or doesn't it matter, i.e. even though the clips are together they're insulated from each other?

 

[CBW]

Under no circumstances join brown and blue together.

 

[ianmcd]

Under no circumstances join brown and blue together.

what could possibly go wrong

 

[markmsl]

Weirdly, black and grey in the heat link= no power to the boiler at all. The only way the boiler will turn on is if the brown is in C and grey is NO. But then the thermostat can't draw turn the heating on and the radiators stay cold. Hot water works though.. I might need to swallow my pride and get someone in and confess I've been experimenting

 

[stem]

If you have some time control elsewhere, such as integral to the boiler or a separate programmer / timeswitch, that should be set to be permanently 'on' 24/7 otherwise it will interfere with the operation of the Nest-e. Electrically the correct connections are as @flameport