How to Wire a Richdel 446PR50HZ Sprinkler System: Identifying Zone Wires

Wiring a Richdel Sprinkler System: A Step-by-Step Guide

If you've inherited a Richdel garden sprinkler system (model 446PR50HZ) that was disconnected by a previous owner, reconnecting it can seem daunting. With six zones plus a pump and common wire, and seven colored wires (white, brown, yellow, green, blue, red, black), figuring out which wire goes where is the first challenge.

Identify the Common Wire

The common wire is the key to the whole system. If you can't tell which wire is common by looking at the controller, go out to the valve boxes. The wire color that connects to every valve is your common wire. Hook that wire to the "COM" terminal on the controller.

Zone Wires Can Go in Any Order

The remaining six wires each control one zone. Their order on the controller terminals doesn't matter for functionality—you can connect them to any station terminal you like. However, if you want a logical watering sequence (e.g., front yard first, then back yard), you'll need to map each wire to its physical zone.

Map Wires to Zones

1. Power up the controller.
2. Manually activate Station 1.
3. Touch each unknown wire to the Station 1 terminal for a few seconds until a valve activates.
4. Note which zone that wire controls, then label it.
5. Repeat for Stations 2 through 6.

Once mapped, wire each zone to the controller terminal that matches your desired watering order.

Final Tips

• Use waterproof wire connectors for all splices.
• Secure wires neatly to avoid accidental disconnection.
• Test each zone manually after wiring to confirm coverage.

With a little patience, you'll have your Richdel system running like new.