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CWire question on multizone heating system

Jdorow
Community Member

I want to install a nest thermostat to control the 3 zones in my house. But there isn’t a CWire currently connected to my existing thermostats and when I installed the first NEST, it said it wasn’t getting enough power.   But I DO have an extra wire in the cable coming to the thermostat, and I’m curious if I can simply connect them to the C connector on the transformer.  I’ve mapped out the wiring for each zone,
4E7B3480-A93B-419D-83E6-877D76327EAA.jpeg8A3D766F-D638-42CA-813D-E9F846D3966E.jpeg  I also have a photo of the wiring, but it’s a mess, so I thought it better to use the schematic…. I can attach if necessary

 

 

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