Connecting a Master Valve

NOTE: Complete this section only if you have a master valve installed. A master valve is a “normally closed” valve installed at the supply point of the main line that opens only when the controller initiates a watering program.

1. At the Master Valve, attach the common wire to either solenoid wire of the valve. Attach a separate control wire to the remaining solenoid wire and make a note of the color corresponding to the master valve.
2. Route these wires to the controller the same way as the station valves. The white common wire will still go to the screw slot marked C. The additional wire coming from the master valve will go in the screw slot marked P.