Manual K-rain 3208-WRFS (page 9 of 24) (English)

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ADJUSTMENTS AND OPERATION

When the Rain Sensor activates due to sufcient 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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K-rain 3208-WRFS Manual

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