The Rain Sensor transmits a wireless signal to the a receiver. 
The Rain receiver gets the signal from the sensor (above) and is located on the southside of the controller's pedestal.
Wiring: Blue goes to RAIN (R) and White goes to - (-) the two yellow wires go to the 24 v terminals on the 205W On the retrofit Irritrols 24 vac (2 yellow wires) go to the main 24 volt terminal and the blue and white wires go to the terminals mark for Rain Sensor. |