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RAINBIRD SMRT-Y Manual

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SMRT-Y Soil Moisture Sensor
System Setup
1. Set the controller to water all the zones at the highest frequency expected during the peak of the season.
This may be every day.
2. Set the zone watering times as they were previously set by the contractor or homeowner.
3. Set the auto-threshold-set feature on the SMRT-Y user interface by simultaneously pressing in and
holding the “Read Sensor” and “Soil Temp” buttons and then pressing the “Soil EC” button once. If you
have set the feature properly the ‘Suspended’ icon and ‘Allowed’ icon will alternately ash. These icons will
continue to ash until the threshold has been automatically set.
4. Ensure the controller is set to run the next morning before the sun shines on the sensor area. This interval
denes the auto-set period.
5. Ensure ‘Bypass Sensor’ is not ashing in upper left corner of the LCD display. Ifashing, press ‘Bypass
Sensor’ button to allow Soil Moisture Sensor operation.
6. Flood the sensor area with a ve gallon bucket of water prior to leaving the property. Also ood the slit
trench marks in the sod.
Recommended Follow-up
1. The watering moisture threshold is determined during the auto-set period. Sometime after the rst
controller run, press the ‘Read Sensor’ button on the SMRT-Y user interface to view the watering moisture
threshold. The displayed number is the moisture level in the root zone that will permit irrigation.
2. Re-set the zone run times by referring to the run-time chart and instructions. To use the chart you will
need the moisture threshold setting obtained in the previous step and the precipitation rates of the
zones.
Optional wiring for Xeriscape or flower beds
You may have zones you wish to water regardless of the moisture level measured by your sensor. For example, a
ower bed drip or a desert landscaping zone. The SMRT-Y can accommodate up to two such zones.
How to connect them:
1. Identify the zone(s) that t into this category. Note which terminal(s) they are connected to on your
controller.
2. Loosen the screw that connects such zone wire to your controller.
3. Strip the wires and connect the Blue wire from the SMRT-Y user interface to the same terminal as the
zone wire.
!
NOTE: There will now be two wires connected to this terminal; a Blue wire going to the SMRT-Y
user interface and a zone wire going to the valve.
4. If you have a second zone to run independently of the moisture sensor, connect the Brown wire from the
SMRT-Y user interface to the second terminal. Now these two zones will run independent of moisture
sensor.
5. Turn on the controller and allow the SMRT-Y user interface to take a soil moisture reading. The reading
should appear in the display after 4-5 seconds. If the reading is zero the wiring to the sensor is not correct
and will need to be reviewed and corrected. If the reading is not zero, the wiring is correct and you may
nish up the grease cap installation on the sensor wiring.
… 14 …


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