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Introduction
The Toro wireless rain sensor system, model TWRS-I for rain sensing and TWRFS-I for rain and
freeze sensing, is a powerful, water conservation and management tool that connects your automatic
irrigation system to actual environmental factors vital to the health and maintenance of your
landscape. Without sensor input, the controller simply turns the sprinklers on and off based on a
routine irrigation schedule. Linking controller operation to real-time rain and/or freeze conditions
eliminates unnecessary irrigation and dramatically reduces water consumption–all without
compromising the health and beauty of your landscape. And–it’s wireless. No cable to run or holes to
drill. Simple installation and setup delivers reliable, intelligent sensor control in a matter of minutes.
Contents Page
Getting Started. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Receiver Module Features. . . . . . . . . . . . . . . . . . . . . 4
Installing the Receiver Module. . . . . . . . . . . . . . . . . 5
Initial Sensor System Test . . . . . . . . . . . . . . . . . . . . . 8
Sensor Module Features . . . . . . . . . . . . . . . . . . . . . . 9
Rain Sensor Site Selection . . . . . . . . . . . . . . . . . . . 10
Installing the Sensor Module . . . . . . . . . . . . . . . . . 11
Freeze Sensor Site Selection. . . . . . . . . . . . . . . . . . 13
Set Centigrade or Fahrenheit Scale. . . . . . . . . . . . . 14
Set Temperature Activation Threshold . . . . . . . . . . 14
Water Conservation Feature . . . . . . . . . . . . . . . . . . 15
Smart Bypass Feature . . . . . . . . . . . . . . . . . . . . . . . 16
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page
Water Delay Feature . . . . . . . . . . . . . . . . . . . . . . . . 16
Signal Strength Display Feature . . . . . . . . . . . . . . . 16
Battery Strength Display Feature . . . . . . . . . . . . . . 17
Dry Out Feature. . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Fail Safe Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Turn Receiver Module Off and On. . . . . . . . . . . . . 20
Set or Restore the Sensor Address Code . . . . . . . . 20
Sensor Module Battery Replacement . . . . . . . . . . . 21
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Warranty Information . . . . . . . . . . . . . . . . . . . . . . . 25
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