Toro TWRS - Manual (Page 15)

Freeze Sensor Site Selection
In addition to the rain sensor site conditions listed on page 10, the following conditions are
necessary to ensure optimum freeze sensor operation. For best results, the sensor should be:
• Located in the coldest portion of the landscape.
• Away from direct exposure to morning sunlight.
• Away from any heat producing or storing device, equipment or appliance such as a pool/spa,
heater, water heater, chimney or hot air vent pipe.
Important: Visual checks and prudent manual watering suspension must be used in
conjunction with any freeze sensor. A freeze sensor should only be relied upon as an aid to
conscientious watering practices, including frequent visual checks. Air temperatures may be
above freezing while the ground and vegetation temperatures remain below freezing. Due to
sensor location and sunlight exposure, actual air temperature may be lower than measured by the
sensor. Operation of the sprinkler system during these conditions may cause icing. Freeze sensor
response time may not coincide with extremely rapid temperature drop, enabling automatic
irrigation to occur.
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CAUTION: The rain/freeze sensor module should be regularly inspected for damage
and manually tested to ensure proper operation.
The Toro Wireless Rain/Freeze sensor system is NOT intended for farm/crop freeze
protection and must not be used for this purpose.
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