Instructions / Assembly
ADJUSTMENTS AND OPERATION
When the Rain Sensor activates due to sufcient rainfall (after rainfall quantities of 1/8" through
1/2" or more), the sprinkler system will become inactive until the moisture-absorbent discs
inside the Rain Sensor have dried out. To adjust to the desired quantity of rainfall, rotate the cap
on the rain sensor housing to the range desired (See Figure 3).
FIGURE 3
The time that it takes the rain sensor to reset for normal sprinkler operation after the rain has
stopped is determined by weather conditions (wind, sunlight, humidity, etc.). These conditions will
determine how fast the hygroscopic discs will dry out, the same conditions your soil experiences.
Note that there is an adjustment capability on the rain sensor that will slow down the reset
rate. By turning the “Vent Adjustment Tab” (See Figure 4) to completely or partially cover the
ventilation holes, the hygroscopic discs will dry more slowly. This adjustment can compensate
for an “overly sunny” installation location or peculiar soil conditions. Experimenting with the
vent ring will best determine the ideal vent setting.
FIGURE 4
Bypassing the Rain Sensor
The Rain Sensor can be temporarily bypassed or deactivated using any one of the
following methods:
• Use the controller’s sensor bypass switch (if equipped).
• Temporarily disconnect the Rain Sensor from the controller’s wiring.
NOTE: Always disconnect power to the controller before performing any wiring tasks.
Adjust the dial to the amount of
rainfall you wish to trigger the rain
sensor to suspend watering.
Low end= 1/8", high end=1/2"
HIGH END
LOW END
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