Wiring a Hardie TC-15b Controller: Power and Valve Connections

Color‑Coded Wiring for Hardie TC‑15b Central Junction Box

120 VAC Power Wires

• Green – Ground
• Black – Hot (Phase)
• White – Neutral

Valve Field Wires

• White (common) – Connects to the controller’s "COM" terminal. This wire daisy‑chains to one lead of every valve solenoid.
• Colored wires (one per zone) – Each connects from the other solenoid lead to the controller’s numbered terminal (1, 2, 3…).

If zone wires are swapped, only the station order changes—no damage occurs.