When you are running a Heat Pump style wiring set up the outdoor will most likely only need 3 wires.
The Y (Compressor)
The O /B (Reversing Valve)
& The C (Common)
What is the most common Tstat Condenser Wire Set up? Print
Created by: Kevin Mena
Modified on: Tue, 25 Aug, 2020 at 5:49 PM
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