So I'm looking for some help in identifying where I can attach a C/Common Wire to my HVAC system, but unfortunately my system doesn't have a control board that I can easily attach a powerkit to. For reference I'm planning to install an Echobee3.
I've uploaded some photos here: http://imgur.com/gallery/LPzoq/
Any advice would be greatly appreciated, probably adding some circle/arrows so I know what you're talking about 😉
After looking at Tester101's answer, here's an annotated picture.
Notice how they're two free wires(red and black)
Best Answer
Based on the new information... It looks like the blue wire from the secondary side of the transformer is the
R
, which would make the yellow secondary wireC
.I should have read the transformer label, that clearly says BL (Blue) is common, and yellow is 24V.