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Installation Procedure
v Adjust Rain Sensitivity: The sensitivity setting determines the amount of
rainfall required to trigger the RainSensor and suspend automatic watering.
The RainSensor is factory-set at 6mm. Prior to installing the RainSensor, adjust
the rainfall sensitivity as preferred to one of four optional settings as indicated in
Figure 2.
To adjust, turn the cap slightly to disengage the pins
from the current setting. Adjust the cap up or down to
the preferred slot position, then re-engage the pins.
Note: Make sure the slot is correctly aligned with the pin
when making an adjustment. Do not force the cap into
position.
Note: The 3mm setting is not recommended for loca-
tions where high-humidity is common.
v Set Sensor Operation Mode (Applies to Model 53769, RainSensor Only):
The RainSensor is preset for normally-closed sensor operation, but can be
easily converted to normally-open if needed. Prior to installation, determine
whether your automatic timer requires a normally-closed or normally-open sen-
sor by referring to the timer user’s guide. If a normally-open sensor is required
(for example, when used with a Toro ECx
TM
or GreenKeeper
®
timer), configure
the RainSensor as shown in Figure 3.
Model 53853 only: If using the Freeze version, model 53853, and your
controller requires Normally Open Sensor operation, the sensor connection can
not be used. Instead, refer to the wiring configuration B and C under “Connect
RainSensor Wiring” section.
1. Using a small screwdriver, release and
remove the access cover by depressing
the two retaining tabs. Slide the control
board assembly out of the housing.
See Figure 3.
2. Carefully remove the wire connector from
the left pin of the microswitch and attach it
to the center pin. Leave the right wire
connected.
3. Slide the control board back into the
housing making sure it is properly aligned.
Install the access cover with the connection
wire knot on the inside the housing.
6mm
13mm
25mm
19mm
3mm
Figure 2
Normally Open
Normally Closed
Figure 3