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soil is too dry, select the wetter setting (three droplets). Continue to
monitor your particular watering requirements based on weather
conditions and overall plant health.
Attach the Receiver to the Timer
Newer timers will require you to attach the included adapter rail
onto the timer rst. Slide the rounded end of the adapter rail into
the matching slot on the top of the timer. Slide the receiver onto
the rail along the top of your timer. The receiver does not need
to slide fully on to work properly. You may need to leave a gap to
allow for operation of the faucet.
Connect the Receiver cable to the socket located on the bottom of
your timer. Note the orientation of the three (3) pins to be certain
the cable is attached correctly.
For a diagram showing the connection to your specic timer, go to
the instructions tab at www.melnor.com
Checking the Connection
After installing the receiver, press any button once to wake the
timer. If the AquaSentry® system is working properly, an antenna
symbol (along with the word “AUTO” on some models) should
appear as shown within 35 seconds indicating communication
between the AquaSentry® and AquaTimer™. If the symbol displays
steadily, your AquaSentry® is working properly and monitoring the
soil’s moisture level.
If the antenna symbol is ashing, one of the following has occurred:
a. The batteries in the moisture sensor are not installed properly or
they are too weak.
b. The Moisture Sensor is out of range.
c. Sensor still set to “O”.
If the antenna symbol fails to appear, the connection between the
Receiver and the AquaTimer™ is faulty.
Check all of the above. Wait for 5 minutes or until the AquaTimer™
display turns o. Then wake the AquaTimer™ and watch for the
antenna symbol. The antenna symbol should appear within 35
seconds. Over time, if the antenna symbol begins to ash, the
batteries in the Sensor are weak and need to be replaced.
Melnor, Inc. • Winchester, Virginia 22603, USA
877-283-0697 • www.melnor.com
Melnor is a registered trademark of Melnor, Inc.
3300_INS_EN_WEB_02
Requirements
This unit requires a Melnor® electronic water
timer model 3015, 3060, 3100 or 3280 (not
included) that includes a connector for this Automatic
Rain Delay. Follow the timer instructions to program
the timer. For more information, call 877-283-0697.
Install the Batteries
Tool required: Phillips head screwdriver.
Remove the two small screws and remove the battery
cover. Insert two, fresh AA batteries. Please note the
positive (+) and negative (–) ends of the batteries and
ensure they are inserted correctly following the markings
inside the battery compartment.
Replace the battery cover and screws. A fresh set of quality
batteries should last a full watering season or about nine months.
Place the Moisture Sensor
CAUTION: Never use a hammer or any other
tool to pound the unit into the ground. Do not
attempt to force the unit into the ground. This will
damage the Sensor. The AquaSentry® has a maximum
wireless range of 200 feet (60 meters). The Sensor must
be placed within the area you are watering. For best
operation, place the Sensor in direct sight of the Timer/Receiver.
The Sensor can be placed out of direct sight of the Timer/Receiver,
but the range may be diminished somewhat.
To insert the Sensor, rst dig a pilot hole about the same size as the
probe. The hole must be deep enough to bury the entire sensor
probe. Remove any large rocks or other debris from the extracted
soil. Place the Sensor into the hole so that the entire probe is under
ground level. The face of the Sensor unit should be turned toward
the Timer/Receiver. Return the soil to the hole and pack rmly into
place. It is important that the entire front surface of the probe be in
contact with the soil.
Selecting the Desired Moisture Level
Individual grass and plant species have varying moisture
requirements. The AquaSentry® Moisture Sensor has three
moisture settings plus OFF. Melnor® recommends initially setting
the knob to the medium setting (two droplets). After a week, you
should reassess the moisture in the area you are watering. If the soil
is too wet, adjust the unit to the dryer setting (one droplet). If the
3300
Automatic Rain Delay
for Melnor Water Timers
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User Instructions
Sensor
Adapter
Receiver