RSD Rain Sensor
1
RSD Rain Sensor
The RSD Rain Sensor automatically monitors rainfall and
shuts off your sprinklers to prevent unnecessary watering.
NOTE
:
The RSD Rain Sensor is a low-voltage device
compatible with all 24 volt alternating current (VAC)
control circuits and 24 VAC pump start relay circuits. DO
NOT USE with any 110/250 VAC devices or circuits, such
as direct-acting pump start systems or pump start relays.
The RSD Rain Sensor is rated for use with up to three
Rain Bird 24VAC, 7VA solenoid valves per station, plus
one master valve.
1. Selecting a Location
Select a mounting location where the rain-sensing head will
receive direct rainfall. Make sure the head extends beyond
the roof line, tree limbs, and any other obstructions. Install
the Rain Sensor in an area that receives as much rain and
sunlight as the grass.
Be sure to mount the sensor above spray from sprinklers.
Avoid mounting locations such as those shown in
Illustration 1
.
2. Operation
Set Rainfall Setting
The rainfall setting determines the amount of rainfall needed
to prevent your irrigation system from watering. You can
adjust the rainfall setting from 1/8" to 3/4" (5mm to 20mm).
The ideal rainfall setting for your location depends on soil
type, humidity, amount of direct sunlight the sensor receives,
and frequency and amount of rainfall. The table below gives
some guidelines to help determine the appropriate rainfall
setting.
NOTE:
At the 1/8" or 5mm setting, a very light rainfall
will activate the sensor and suspend watering. The 1/8" or
5mm rainfall setting is not recommended in areas with
high humidity.
To set the rainfall setting, turn the sensor dial cap until the
desired rainfall setting lines up with the arrow on the sensor
body (A), as shown in
Illustration 2
.
Irrigation site conditions
Rainfall setting
Dry climate / low humidity
Infrequent, light rains
Sensor receives long periods of
direct sun
Clay-type soils
1/8" to 1/4"
(5mm to 10 mm)
Moist climate / high humidity
Frequent, heavy rains
Sensor mounted in a mostly shady
area
Sandy soils
1/2" to 3/4"
(15mm to 20mm)
