(Optional)
The Toro Rain Switch (model # 53221) is a remote rain
sensing device which can be connected directly to your
ECx to automatically interrupt watering during rain.
A sensor bypass switch is provided in the ECx which
enables the Rain Switch operation to be turned On and
Off.
When the Rain Switch absorbs rain water it automatically
signals the ECx to suspend all watering operations. The
“No Watering” symbol will appear in the upper right
corner of the display until the Rain Switch drys out and
automatically resets. The “No Watering” symbol will dis-
appear and timer operation will resume as programmed.
1. Route the wire cable from Toro Rain Switch into the
timer housing with the valve wires.
2. The Rain Switch cable has four wires: two copper
wires and two silver wires. Only two of the wires are
used. Connect the heavier 18 AWG (0.75mm
2
) copper
wire and the thin 24 AWG (0.50mm
2
) silver wire to the
terminals labeled SENSOR (8). Trim off the remaining
two cable wires.
3. Set Sensor Switch (6) as required: ON allows the
Rain Switch to interrupt watering; OFF bypasses the
Rain Switch input.
Connecting A Toro Rain Switch
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