Nest Vaillant thermocompact vu gb 282

[evoandy2]

Hello looking for help i have a y plan and guess link from boiler 4 to heatlink 3 and boiler 3 heatlink 2 y plan wired like diagram but pump is in boiler not stand alone.

so my question is where do i connect zone valve orange wire as guess boiler is wired to 3 amp spur feed permanently and not to pin 8 feeding orange wire zone valve and pin 3 on heatlink is a switched live

Have tried to wire as shown but only get hot water if connect zone valve to live or switched live

Thanks

 

[picasso]

3 on the boiler pcb is the permanent live to the nest, 5 is the neutral and 4 is the switched live where the orange from the zone valve connects.

 

[evoandy2]

ok thanks do i need to take neutral from 5 as at min takes off spur not 5 which has no connection
will give it a go tomorrow
thanks

 

[picasso]

No it does not matter if you take it from the spur, usually just makes it neater if the live, neutral,earth and switched live are in one cable.

 

[evoandy2]

up and running thank you