The 24 VAC supply power terminal block is a gray, removable, 2-terminal plug that fits into a board-mounted jack on the upper left of the ZEC controller. Wire the 24 VAC supply power wires from the transformer to the HOT and COM terminals on the terminal plug as shown in the following figure.
|Supply power terminal block jack
|Supply power terminal block plug
|Wires from Johnson Controls 90 VAC to 24 VAC, Class 2, power transformer