Toro Wireless Rain and Rain/Freeze Sensor Installation
The Toro Wireless Rain and Rain/Freeze Sensors are available to connect
directly to the TMC-424 to automatically interrupt automatic controller opera-
tion during rain and/or freeze conditions.
When the sensor absorbs moisture or detects a near-freezing temperature, it
signals the TMC-424 to suspend automatic watering operations. SEN will be
displayed until the sensor automatically resets enabling the controller to return to
automatic operation.
Note: A sensor bypass switch is provided to disable sensor operation as needed.
1. Route the sensor wires from the device into the controller housing through
the provided access hole.
2. Remove the jumper wire installed between the sensor terminals.
3. Connect the white wire to the top sensor (S) terminal. Connect the brown
wire to the remaining sensor (S) terminal. Connect the two red wires to the
Hot Post and one common (COM) terminal.
4. Set the sensor switch to Sensor Active.
5. Refer to the instructions provided with the Toro Wireless Rain Sensor
additional installation and set up information.
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