Nest Thermostat with Vaillant EcoTec Plus 837

[ihawk]

How do I wire up my combi boiler to the nest heatlink?

I have attached sections from the installation guide of my Vaillant. I've highlighted the section where I think the 2 and 3 cables go, what do you think?

Untitled

• ihawk
• 7 May 2014
• 1

Untitled

• ihawk
• 7 May 2014
• 1

Untitled

• ihawk
• 7 May 2014
• 1

Also thinking that I will run a cable from the mains fused power supply for the L and N? or does it go from the X1 RT?

Thanks

 

[sp7980]

Hi,
I have the same Valliant boiler and need to connect the Nest heatlink to it.

I assume you've managed to connect yours up, can you provide info on how you did it please?