User’s Guide
Wireless Rain Sensor Series
Rain Sensor, Model TWRS and
Rain/Freeze Sensor, Model TWRFS
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The wireless sensor system is comprised of a programmable, weather-resistant receiver module
and a sensor module with built-in transmitter. The receiver installs next to the irrigation controller
and connects to the controller’s 24 Vac power source and sensor input terminals (if equipped)
or splices directly into the irrigation valve common wire. The sensor module is installed within
range of the receiver in a location that best represents the landscape’s sun/shade exposure and
can provide reliable communication from the sensor to the receiver.
Once activated by preset rain or low temperature levels (Rain/Freeze model only), the sensor
communicates to the receiver via ultra high-frequency radio signal. The receiver responds by
placing the controller’s automatic watering schedule on hold or by simply opening the valve
common circuit to prevent sprinkler valve operation. When watering is once again needed,
the sensor system automatically resets, allowing automatic irrigation to resume.
More than just an accurate rain switch, the wireless sensor system actually adapts to your
landscape with the simple, yet sophisticated Water Conservation feature. Just choose the
conservation level that corresponds to your landscape soil type and the sensor location.
A dry-out period, adjusted for actual rainfall duration, is automatically placed after the sensor
system resets to effectively delay automatic watering until it is actually needed.
TM
Other standard features include a Smart Bypass button that gives you manual control over the
sensor system with a single touch, system status indicators to see at glance that your sensor
system is active and watering is on hold, watering delay to postpone automatic watering from
1 to 5 days, air temperature displayed for Rain/Freeze sensors and even a Fail-safe mode to allow
irrigation in case the sensor system is not performing properly.
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Getting Started
The wireless rain sensor system is designed for easy installation, setup and years of trouble-free
operation. In most cases, the system components can be installed and fully operational within
minutes. All you will need is a Phillips screwdriver and basic do-it-yourself skills.
If you have problems with any portion of the installation, or the product does not seem to function
properly, refer to the Troubleshooting section on page 22 first. If the problem is not listed, or the
remedy does not seem to help, call the Toro Irrigation help line at 1-877-345-8676 for assistance.
Here’s all there is to it:
Step 1
Step 2
The sensor and receiver are tested at close
range to verify operation.
The receiver is installed and connected
to your irrigation system controller.
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Step 4
Step 3
The sensor is adjusted to the preferred
rainfall activation level.
A sensor installation site is chosen and the
system is tested again to verify operation.
Step 6
Step 5
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The sensor is installed using the Quick Clip
mounting bracket or pipe-mount adapter.
The operating features are set to your
preferences.
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Receiver Module Features
1– Setup Button–Accesses the sensor system operating features.
3
4
2– Adjust Button–Scrolls through and selects settings within the
system operating features.
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6
7
3– Mast Antenna–Adjusts easily for best signal reception.
4– Digital Display–High-resolution LCD screen provides visual
reference for sensor system operating features.
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1
5– Sensor Status Indicators–Illuminates when sensor system is
active and automatic watering is on hold. Flashes when sensor
is active but has been bypassed to enable automatic watering.
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6– Smart Bypass Button–Multi-functional use. Pressed to
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bypass sensor operation, allowing automatic watering to
resume. Switches the Water Delay feature on and off.
7– Water Conservation LEDs–Indicate the Water Conservation
feature level selected (Minimum, Medium or Maximum).
8– Hinged Cover–Opens downward for receiver control access.
Closed position protects receiver when installed outdoors.
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Installing the Receiver Module
Important: Installation of this product must comply with national and local building and
electrical codes. For assistance, contact a professional irrigation system contractor in your area.
The receiver module is suitable for either indoor or outdoor installation. Select a location next to
the controller that provides the following conditions:
• The display screen is clearly visible and the control buttons are easily accessed.
• The connection cable can reach the controller wiring terminal strip without straining.
• The antenna will be unobstructed and is able to be adjusted.
Figure 1
1. Install one of the provided stainless steel screws into the wall at the
intended receiver location. Leave a 1/8" (3mm) gap behind the screw head.
Note: Use screw anchors if installing the receiver on drywall or masonry.
2. Hang the receiver on the screw ensuring the keyhole slot drops down
onto the screw shaft. Back the screw out as necessary for good fit.
3. Install a second screw through the lower tab to secure the receiver.
4. Route the connection cable through the bottom of the controller cabinet
to the wiring connection terminals.
Important: If the receiver module is installed outdoors, be sure to keep the cover in the
closed position when you do not need to view the display or access the control buttons.
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Connecting the Receiver Wires
CAUTION: The receiver requires continuous 24 Vac power for operation. Connecting to
110 Vac or higher will result in irreparable damage. Ensure power to the controller has been
removed prior to connecting the receiver wires.
The sensor system is designed to work with most makes and models of irrigation controllers.
• If your controller is equipped for sensor connection, follow the steps in Wiring Procedure I.
• If your controller is not equipped for sensor connection, use Wiring Procedure II on page 7.
Wiring Procedure I (sensor-ready)
Figure 2 - Normally-closed Sensor
Note: Refer to your controller user’s guide for
the type of sensor required: Normally Closed
(NC) or Normally Open (NO).
Jumper
1. Locate the sensor connection terminals,
PUMP/
MV
SENSOR
COM
24 VAC
1
2
3
4
usually labeled “SENSOR” or “SN.”
Remove the jumper if one is installed.
2. Attach the White wire to either sensor
terminal (disregard + and – symbols).
Red
Red
To Valves
3. For a normally-closed sensor, attach the
Brown wire to the remaining sensor terminal.
Tape back the Yellow wire. See Figure 2.
White
Brown
Yellow
X
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For a normally-open sensor, attach the
Yellow wire to the remaining sensor terminal.
Tape back the Brown wire. See Figure 3.
Figure 3 - Normally-open Sensor
PUMP/
MV
SENSOR
COM
24 VAC
1
2
3
4
4. Attach the Red wires to the 24 Vac terminals.
Important Most controllers with sensor
connections also provide a control switch to
bypass sensor operation if necessary. Check
the switch setting to make sure it is not in
the Bypass or Active position.
Red
Red
White
Yellow
Brown
To Valves
X
Wiring Procedure II (no sensor feature)
Figure 4 - Splice Valve Common
1. Locate the valve common wire terminal,
generally labeled “C” or “COM”, and remove
all common wires for valves, pump relay, etc.
PUMP/ COM 24 VAC
3
4
MV
1
2
2. Attach the White wire to this terminal.
3. Splice the Brown wire to the common wires
and insulate the connection using a wire nut
or electrical tape. Tape back the Yellow wire.
See Figure 4.
Red
Red
White
Brown
Yellow
Common
To Valves and
Pump/MV
X
4. Attach the Red wires to the 24 Vac terminals.
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Initial System Test
Before installing the sensor module, test the sensor at close range to verify operation. Once this
test has been completed satisfactorily, the sensor module can be installed. If a problem occurs
during the test procedure, refer to “Troubleshooting” on page 22.
1. Apply power to the controller and check its operation to confirm that it works properly.
2. When power to the receiver is first applied, the “Min”
Figure 5
Figure 6
Water Conservation indicator will illuminate. The
rain sensor receiver (TWRS) will display alternating
boxes (Figure 5). The rain/freeze sensor receiver
(TWRFS) will display two flashing bars (Figure 6).
3. Hold the sensor next to the receiver. Press and hold
the sensor test spindle as shown in Figure 7.
Important: The test spindle must held down for
least of 15 seconds to establish communication.
The Sensor Status indicator will illuminate (Figure 8),
the Antenna symbol will flash and the signal bars
will appear. Release the test spindle. The TWRS
receiver will display alternating boxes (Figure 9)
and the TWRFS receiver will display the current air
temperature (Figure 10).
Figure 8
Figure 7
Figure 9 (TWRS)
Figure 10 (TWRFS)
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Sensor Module Features
1– Rain Threshold Adjustment–Adjusts the rain sensor to
accumulate 1/8", 1/4", 1/2" or 3/4" (3mm, 6mm,12mm or
19mm) of rainfall before signaling the receiver to hold
watering. (Factory default setting 1/4" (6mm).
1
2
2– Sensor Test Spindle–Pressed to manually activate the
sensor for setup and test procedures.
3– Batteries (not shown)–Two 3V lithium batteries, installed
at time of manufacture, will provide approximately five
years of service under normal use conditions.
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4– Antenna–Positioned downward for maximum signal
transmission strength.
5– Pipe-mount Adapter–Replaces Quick Clip mounting
bracket to enable installation on 1/2" (13mm) diameter
Schedule 40 PVC pipe.
3
4
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6– Quick Clip Mounting Bracket–Simplifies sensor
module installation. Adjustable pivot point for easy
vertical alignment.
5
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Installing the Sensor Module
Choosing the right installation site for the sensor module is the key to getting the maximum benefit
from your sensor system. Select a sensor installation site that provides the following conditions:
• Unobstructed exposure to rainfall–away from overhangs, tree branches, etc.
• Protected from irrigation spray, rainwater accumulation and the possibility of submersion.
• Exposure to sunlight and shade conditions similar to the landscape being watered.
• Strong communication signal from the sensor to the receiver.
Note: If installing a Rain/Freeze sensor specifically for freeze detection, refer to the additional
site selection considerations provided on page 13.
Before installing the sensor module, test the system once more to confirm operation by using the
following test procedure:
1. Activate a watering zone that is visible from the intended installation site.
Note: The manual operations mode of some controllers will bypass the sensor circuit. If your
controller operates like this, set an automatic start time to have the sprinklers run now.
2. With the sprinklers on, press and hold the sensor spindle until the sprinklers shut off, then
release the spindle. If the test is successful, the sensor is ready to install. If the sprinklers do not
shut off, try moving the sensor a few feet in either direction and test again. Moving the receiver
antenna slightly may also improve the signal strength.
Refer to “Troubleshooting” on page 22 for additional information.
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3. Adjust the Rain sensor to the preferred rainfall threshold activation point.
The settings are indicated in 1/8", 1/4", 1/2" and 3/4" on one side of the cap,
and 3mm, 6mm, 12mm and 19mm on the other. First, turn the cap to align
the stationary pin with the vertical slot. Guide the cap to the preferred
horizontal slot position, then turn it just enough to engage the pin.
Figure 11
1/8
1/2
1/4
3/4
Note: The 1/8" (3mm) setting is not recommended for high humidity or foggy locations.
4. To install the sensor module on a rain gutter, simply position the Quick Clip bracket on the
lipped edge of the gutter and secure by tightening the thumb screw (Figure 12).
The sensor module can also be
Figure 13
Figure 12
mounted to any solid structure,
such as a fence or the side of a
roof using the Quip Clip bracket
and two stainless steel screws as
shown in Figure 13.
Note: For optimum signal
strength, the antenna wire should
hang straight down. Ensure
antenna is not in contact with any
metal object or structure.
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A pipe-mount adapter is provided to enable sensor installation on a secured section of 1/2" (13mm)
diameter Schedule 40 PVC pipe.
Note: Metal pipe or conduit may interfere with radio signal transmission and is not recommended.
Remove and replace the Quick Clip bracket with the pipe-mount adapter. Ensure the friction
washer is installed between the adapter and housing tabs as shown in Figure 14.
Check the sensor for vertical alignment. To
adjust, loosen the Phillips screw slightly, align
as needed and tighten screw. See Figure 15.
Figure 14
Figure 15
Washer
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Freeze Sensor Site Selection
In addition to the rain sensor site conditions listed on page 10, the following conditions are
necessary to ensure optimum freeze sensor operation. For best results, the sensor should be:
• Located in the coldest portion of the landscape.
• Away from direct exposure to morning sunlight.
• Away from any heat producing or storing device, equipment or appliance such as a pool/spa,
heater, water heater, chimney or hot air vent pipe.
CAUTION: The rain/freeze sensor module should be regularly inspected for damage
and manually tested to ensure proper operation.
The Toro Wireless Rain/Freeze sensor system is NOT intended for farm/crop freeze
protection and must not be used for this purpose.
Important: Visual checks and prudent manual watering suspension must be used in
conjunction with any freeze sensor. A freeze sensor should only be relied upon as an aid to
conscientious watering practices, including frequent visual checks. Air temperatures may be
above freezing while the ground and vegetation temperatures remain below freezing. Due to
sensor location and sunlight exposure, actual air temperature may be lower than measured by the
sensor. Operation of the sprinkler system during these conditions may cause icing. Freeze sensor
response time may not coincide with extremely rapid temperature drop, enabling automatic
irrigation to occur.
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Set Temperature Activation Threshold (TWRFS models only)
The freeze sensor temperature activation threshold is adjustable from 35°F to 45°F or 2°C to 7°C.
When the air temperature reaches the threshold setting, the freeze sensor activates the receiver.
The Freeze Sensor Status indicator will turn on. The sensor system will return to the Monitor
mode when the outside air temperature rises above the sensor threshold temperature.
Select Temperature Threshold
Figure 16
1. Press the Setup button to display Freeze. The display will indicate the
current temperature threshold setting. See Figure 16.
Note: The
display prompt will begin flashing to indicate the selected
feature is adjustable.
2. Press the Adjust button to select the preferred temperature.
Figure 17
Select Temperature Scale
1. Press the Setup button to display °F or °C. The display will indicate the
current temperature scale.
2. Press the Adjust button to display the alternate scale.
Congratulations!
Your Wireless RainSensor system installation is complete. Now, to take advantage of the unique
Water Conservation feature, review the information on the next page and select the level that best
suits your landscape application.
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Water Conservation Feature – By simply choosing the Minimum, Medium or Maximum
conservation level that corresponds to your landscape’s soil type and the sensor location, a dry-out
period, adjusted for actual rainfall duration, is inserted after the
sensor system resets to delay the resumption of automatic watering.
Figure 18
Each Water Conservation level represents a baseline value that
is automatically adjusted to compensate for rainfall duration.
Min (display number 1) – sets baseline at no days of delay.
Med (display number 2) – sets baseline at one day of delay.
Max (display number 3) – sets baseline at two days of delay.
To assist in choosing which conservation setting to use, review
the chart in Figure 18. First select the landscape soil type. Now,
drop down to the row that best describes the sun/shade coverage
of the sensor location. The level indicated where the two conditions meet is
Figure 19
the suggested starting point. That’s all there is to it!
1. Press the Setup button to display Water Save. The display will indicate
the current water conservation level setting and the corresponding level
indicator will be illuminated. See Figure 19.
Note: The
display prompt will begin flashing to indicate the selected
feature is adjustable.
2. Press the Adjust button to select level 1, 2 or 3.
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Smart Bypass Feature
Pressing the Smart Bypass button switches an active sensor system
Off and places it in the Bypass mode. When the sensor is bypassed, the
controller resumes automatic watering operations as scheduled.
The Sensor Status indicator and the Bypass display prompt will flash to
indicate when the sensor system is in the Bypass mode. See Figure 20.
Figure 20
The Bypass mode will remain in effect until the sensor system automatically resets and returns to
the Monitor mode or is manually canceled by pressing the Smart Bypass button again.
Water Delay Feature
The Water Delay feature provides a convenient method of postponing irrigation from 1 to 5 days
when rain or freeze conditions are expected. The number of Water Delay days is selected in the
Water Delay screen, then activated and canceled by pressing the Smart Bypass button.
1. Press the Setup button to display the Water Delay screen.
2. Press the Adjust button to select 1.0 to 5.0 days. See Figure 21.
Figure 21
• To activate the Water Delay period, press the Smart Bypass button.
The number of days remaining in the delay period is alternately displayed.
Automatic watering will resume when the display reaches 0.0.
Note: Water Delay can not be activated while the sensor system is in the Active mode.
• Once activated, Water Delay operation can be canceled by pressing the Smart Bypass button.
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Signal Strength Display
This feature displays sensor signal strength on a digital scale ranging from 0.0 to 10.2
1. Press the Setup button as needed to display the antenna icon and the
Figure 22
digital readout. The display will indicate the strength of the last received
signal. See Figure 22.
Important: A signal strength value less than 2.0 is not reliable and
may cause inconsistent operation. Relocate the sensor as needed to
increase the signal strength. Refer to “Resolving Reception Problems”
on page 22 for additional information.
Battery Strength Display
This feature displays sensor battery strength on a bar scale. The strength of the battery is indicated
by the height of the bar stack: No bar = a dead battery to six bars = full strength.
1. Press the Setup button as needed to display the battery
symbol and
Figure 23
the bar scale. See Figure 23.
Note: Low battery strength is indicated when the battery symbol appears
on the main display. To prevent possible loss of communication, battery
replacement is recommended.
Refer to “Sensor Module Battery Replacement” on page 21.
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Dry Out Feature
The Dry Out feature is provided to override the Water Conservation baseline level, allowing the
dry-out delay period to be set in 0.5-day increments from 0.5 to 4.0 days.
Note: Before using the Dry Out feature, allow the sensor system to normalize by cycling through
rain and/or freeze activation several times.
1. Press the Setup button to display Dry Out. The display will indicate the current Dry Out day
setting (factory default is 0.0).
Figure 24
2. Press the Adjust button to select the desired value (0.5 to 4.0 days).
See Figure 24.
Note: Once activated, Dry Out operation can be canceled by pressing the
Smart Bypass button.
Note: Reselecting a Water Conservation level will override the Dry Out feature setting.
Fail Safe Feature
The Fail Safe feature is provided to alert and respond to a loss of communication signal and/or if
the sensor system stays in the active mode for a prolonged period of time. This important feature
safeguards your automatic irrigation system from being inadvertently shut off for an indefinite
period of time due to a sensor system malfunction.
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Loss of communication
If the sensor system does not communicate within a 24-hour period, it will
remain in its current state (Active or Monitor). To alert you to this condition,
the Attention Required symbol will be displayed. The Antenna symbol
and current air temperature (TWRFS only) will be flashing and the signal
bar indicator will be cleared. See Figure 25.
If communication is not restored within 48 hours, the receiver module will
automatically revert to the Monitor mode, allowing the irrigation system to
resume automatic operation. The Attention Required and Antenna symbols
will flash. On the TWRFS model, the temperature is replaced with two dashes.
The Water Conservation indicators will flash in unison. See Figure 26.
Figure 25
Figure 26
Prolonged Active Mode
If the sensor system remains in the Active mode for seven consecutive days, it
will automatically revert to the Monitor mode, allowing the irrigation system to
resume automatic operation. The Sensor Status indicator will flash continuously
and the Attention Required symbol will be displayed. See Figure 27.
Figure 27
Note: This condition generally indicates a sensor problem. Check the
sensor test spindle to make sure it moves freely. (The sensor discs must
be dry for this test).
• To reset the sensor system, press the Smart Bypass button one time.
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Turn the Receiver Module Off and On
1. To turn the receiver module Off, press and hold the Adjust button until
Figure 28
two dashes are displayed (approximately 5 seconds), then release.
2. To turn the receiver On, press the Setup button two times. The receiver
will return to the normal display mode within approximately 10 seconds.
Set or Restore the Sensor Address Code
The receiver and sensor modules are factory-matched to communicate using a specific address
code. If you have purchased a new sensor module or it becomes necessary to reset the address
code, use the following procedure to reestablish communications:
1. Press and hold the Smart Bypass button until all three Water
Figure 29
Conservation indicators are illuminated and the
display prompt
begins blinking (approximately 15 seconds). See Figure 29.
2. Activate the sensor module at close range by pressing the test
spindle until the Sensor Status indicator is illuminated, then release
the test spindle. Refer to step 3 of “Initial System Test” on page 8
for additional information.
Note: If the Water Conservation level is set to Medium or Maximum ,or the Dry Out feature is in
use, the sensor system will be activated. Press the Smart Bypass button to reset the receiver to
the Monitor mode.
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Sensor Module Battery Replacement
Figure 30
1. Unscrew and remove the bottom cap from the sensor
housing.
2. Grasping the edges of the circuit board assembly, carefully
slide the circuit board assembly out of the housing.
3. Remove the battery cover and batteries.
4. Insert two new 3V CR2032 (or equivalent) batteries with
the positive (+) side facing toward the retaining clip.
Note: Properly dispose of the used batteries according
to the battery manufacturer’s recommendations.
5. Install the battery cover.
6. Align the circuit board assembly with the housing guide
slots and carefully insert it into the housing. The circuit
board will fit only when oriented properly. The bottom
edge of the circuit board and housing will be even when
fully inserted.
Battery
Cover
7. Thread the antenna wire through the hole in bottom cap.
Screw the cap onto the housing and tighten by hand.
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Troubleshooting
If you encounter problems at any point in the installation process, or the components do not seem
to function properly, try the Troubleshooting procedures first. If the problem is not listed or the
remedy does not resolve the problem, call the Toro Irrigation help line at 1-800-664-4740.
Solving Reception Problems
The Wireless RainSensor has an operating range of 500' (152.4m) LOS (Line-of-Site).
Note: Line-of-Site is a radio signal transmission measurement standard equivalent to an open
field site with no obstructions.
However, in most cases, there are buildings or other objects between the sensor and receiver
modules that can reduce signal strength. Most residential and light commercial buildings do not
reduce the signal enough to pose problems under normal conditions. However, there are some
structures with very thick, dense walls, or that involve large amounts of radio frequency
interference due to electronic equipment that can reduce the sensor signal range.
To improve signal strength:
• Move the antenna away from any large metal object.
• Avoid indoor receiver locations where cellular or cordless phones have trouble with reception.
• Mount the sensor and receiver modules as close together as possible.
• Move the sensor module to one side if is installed directly over the receiver module.
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The receiver display is blank.
• Check the 24 Vac power connections. The red power wires from the receiver must be connected
to the controller’s 24 Vac power source. Make sure the power wires are not connected to the
station or pump/master valve terminals. These terminals only provide 24 Vac power when the
controller is operating the sprinkler zones.
The sensor module does not activate the receiver at close range.
• The receiver module may not recognize the sensor module address code. See “Set or Restore
Sensor Address Code” on page 20.
• Remove and replace the sensor module batteries.
The sensor system works, but the controller does not respond to the sensor.
• Check the Yellow or Brown wire connection. The Brown wire must be used for Normally
Closed (NC) controller operation and Yellow wire for Normally Open (NO) operation.
• The Brown wire must be used when splicing into the valve common wire.
• Make sure the controller’s “Sensor Bypass” switch is not in the Bypass or Active position.
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Specifications
Models: TWRS (Wireless RainSensor) and TWRFS (Wireless Rain/Freeze Sensor)
Wireless Communication Range: 500' (152.4m) LOS (line-of site)
Sensor Type: Industry-standard hygroscopic disc stack with adjustable rainfall sensitivity
Sensor Module Batteries: (2) 3V cells - CR2032 (or equivalent)
Average Battery Life: 5 years
Operating Temperature Range: -20°F to 120°F (-29°C to 49°C)
Receiver Power: 22–28 Vac/Vdc, 100mA (from controller w/Class 2, UL-approved transformer)
Relay Contacts Output: Normally Open (NO) and Normally Closed (NC) 3A at 24 Vac
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The Toro Promise – Five-year Limited Warranty
The Toro Company and its affiliate, Toro Warranty Company, pursuant to an agreement between them, jointly warrants, to
the owner, each new piece of equipment (featured in the current catalog at date of installation) against defects in material and
workmanship for for a period described below, provided they are used for irrigation purposes under manufacturer's
recommended specifications. Product failures due to acts of God (i.e., lightning, flooding, etc.) are not covered by this warranty.
Neither Toro nor Toro Warranty Company is liable for failure of products not manufactured by them even though such
products may be sold or used in conjunction with Toro products.
During such warranty period, we will repair or replace, at our option, any part found to be defective. Your remedy is limited
solely to the replacement or repair of defective parts.
Return the defective part to your local Toro distributor, who may be listed in your telephone directory Yellow Pages under
"Irrigation Supplies" or "Sprinkler Systems," or contact The Toro Warranty Company P.O. Box 489, Riverside, California,
92502. Phone (800) 664-4740 for the location of your nearest Toro distributor or outside the U.S., call (951) 688-9221.
This warranty does not apply where equipment is used, or installation is performed in any manner contrary to Toro’s
specifications and instructions, nor where equipment is altered or modified.
Neither Toro nor Toro Warranty Company is liable for indirect, incidental or consequential damages in connection with the
use of equipment, including but not limited to: vegetation loss, the cost of substitute equipment or services required during
periods of malfunction or resulting non-use, property damage or personal injury resulting from installer’s actions, whether
negligent or otherwise.
Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or
exclusion may not apply to you.
All implied warranties, including those of merchantability and fitness for use, are limited to the duration of this express
warranty.
Some states do not allow limitations of how long an implied warranty lasts, so the above limitation may not apply to you.
This warranty gives you specific legal rights and you may have other rights which vary from state to state.
The Toro Wireless RainSensor series is covered by this warranty for a period of five years from the date of installation.
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Electromagnetic Compatibility
Domestic: This device complies with FCC rules Part 15. Operation is subject to the following two conditions: (1)
This device may not cause harmful interference and (2) this device must accept any interference that may be
received, including interference that may cause undesirable operation.
This equipment generates and uses radio frequency energy and if not installed and used properly, that is, in strict
accordance with the manufacturer's instructions, may cause interference to radio and television reception. It has
been type tested and found to comply with the limits for a FCC Class B computing device in accordance with the
specifications in Subpart J of Part 15 of FCC Rules, which are designed to provide reasonable protection against
such interference in a residential installation. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or
more of the following measures:
Reorient the receiving antenna, relocate the remote control receiver with respect to the radio/TV antenna or plug
the irrigation controller into a different outlet so that the irrigation controller and radio/TV are on different branch
circuits.
If necessary, the user should consult the dealer or an experienced radio/television technician for additional
suggestions. The user may find the following booklet prepared by the Federal Communications Commission helpful:
"How to Identify and Resolve Radio-TV Interference Problems". This booklet is available from the U.S.
Government Printing Office, Washington, DC 20402. Stock No. 004-000-00345-4.
Important: Changes or modifications to this unit, not expressly approved by the party responsible for
compliance, could void the authority to operate the equipment.
FCC ID: OF7TWRS
IC: 3575A-TWRS
© 2005 The Toro Company, Irrigation Division
Form Number 373-0332 Rev. A
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