Nest Power Connection for Heat Only wiring configuration

[Lgranlund]

I am connecting a nest power connector to a heat only system to a Wirsbo zone controller.  I don’t know what to do with the white C wire on the power connector.  Does it connect somewhere and if so where?

[CoolingWizard · Accepted solution]

@Lgranlund ,

On the left side of your zone controller you should see R-C-ES-ES. This is where the Common and R are coming from your HVAC transformer. 

AC Cooling Wizard

[Lgranlund]

Yes, I see this.  

[CoolingWizard]

How many zones do you have active?  Secondly, are there any unused wires in your thermostat cable?  If so connect the unused wire to C at both ends and leave power adopter in the box it came in. 

AC Cooling Wizard