How do I connect the two wires from my JAIN Control Valve to my controller?
Irrigation valves and controllers are designed to keep secondary voltage low for safety purposes. While you may feel a little shock if a valve pit is full of water, the shock is only 12-24V, a big difference from the older 110V model solenoids. Each solenoid will consist of two wires, a valve wire and a COMMON or GROUND wire.
The solenoid component on a control valve works as part of a simple relay system. Voltage travels through one wire, into the copper coil/solenoid and back out to the controller. The wire that carries the signal back to the controller is called the COMMON wire. This wire is shared between all valves and thus its name.
Simply connect one of either wires from the solenoid to the given station number on the controller and the other to the COMMON or GROUND terminal on the controller. COMMON terminals are sometimes referred to as COM and GROUND terminals as GRND. To make installation easier, most if not all modern irrigation solenoids are not polarity specific or in other words, it doesn’t matter which wire is used for the Valve terminal and which for the COMMON terminal.
Imagery: Control Valve with wires and solenoid identified