Nest v3 wiring and S-Plan

[canwedoit]

Hi,

I'm rewiring the central heating with a Nest v3 which controls HW and CH.

I have three zones: The CH, the cylinder in the airing cupboard and another cylinder, a Megaflo CL210.

The electrician said there was a fault in the wiring between the airing cupboard and the boiler house and he couldn't get at it. I have run fresh cables (4-core and earth, 1.5mm2).

The Nest takes the place of the existing programmer and room thermostat. This simplifies the layout. The boiler is a Worcester Bosch Greenstar 40CDi conventional.

Could someone please check my drawing and see if it's correct, before I make a mistake?

For completeness, I also attach the wiring diagram from the Nest instructions. I have left out the Open Therm terminals and the 12v terminals to power the Nest unit.

Thank you very much
Phil

 

[dan2071]

From what I can see, it looks spot on

 

[canwedoit]

Thanks very much, Dan. Much appreciated.

Phil