Melnor Inc. 3300-1 User Manual

The Melnor AquaSentry™ works in 

conjunction with Melnor’s AquaTimers™ 

to provide complete watering manage

-

ment for your lawn or garden. Place the 

sensor in the area you ar

e watering and 

set the desired moistur

e level. Then 

attach the receiver to your timer

. The 

AquaSentry™ will prevent watering 

when it is not needed and end 

watering when your desired level 

has been reached. It’

s that simple. 

The result is healthy grass and 

plants while saving money and 

conserving water.

Melnor, Inc.

3085 Shawnee Drive

Winchester, V

A 22601

540-722-5600

100 Summerlea Road

Brampton, Ontario L6T 4X3

905-792-9330

0

42

20

6

33

00

5

5

1. Changes or modifications not expressly appr

oved by Melnor, Inc. could 

void the user's authority to operate the equipment.

2. This equipment has been tested and found to comply with the limits for a 

Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are 

designed to provide r

easonable protection against harmful interfer

ence in a 

residential installation. This Equipment generates, uses and can radiate radio 

frequency ener

gy and, if not installed and used in accordance with the 

instructions, may cause harmful interference to radio communications. 

However there is no guarantee that interfer

ence will not occur in a particular 

installation. If this equipment does cause harmful interference to radio or 

television reception, which can be determined by tur

ning the equipment off 

At Melnor, we’re 

committed to the 

responsible use of one 

of the world’s most 

precious resources. 

We continue to 

introduce innovative 

products that help you 

conserve water while 

maintaining healthy 

lawns and gardens.  

Through our dedication 

and our products, we 

give you the tools you 

need to Be Water 

Wise. We believe that 

with dedication and 

our creative products 

we can all learn to

Be Water Wise.

1. Residential use only. Not intended for commer

cial applications.

2. Intended for outdoor use only.

3. Severe electrical shock could r

esult if water is 

  

  sprayed into outlets or sour

ces of electrical current.

4. Do not use water over 115° F (46° C).

Model

TM

n

  Melnor AquaTimer™ included

n

  View entire program at a glance

n

  Easy to set

n

 Automatically Water When 

   You Want

n

 Monitor the Soil to Maintain   

   Desired Moisture Level

n

 Save Water, Time and Money

Patent Pending

TM

®

Tool required:  Phillips head screwdriver.

Remove screws and lift off the battery cover. You may need to use the 

screwdriver to gently pry off the battery cover. Insert one 9V battery 

and replace battery cover and screws. Make note of the positive and 

negative contacts.

NOTE: Your AquaTimer

®

 can be programmed on or off the faucet. 

It may be easier to program the timer first and then attach it.

Simply attach the top coupling nut to the faucet by twisting the nut clock- 

wise. The nut should be snug. Do not overtighten. Once the AquaTimer

®

 is 

attached, turn on the faucet and leave it on while the timer is attached. 

Remember to turn off the water when you need to remove the AquaTimer

®

.

Attach a garden hose to the outlet end of the timer and then set up a 

sprinkler as you normally would.

1.  Use left arrow to decrease and right arrow to increase numbers (        ) 

  to set “Current Time” to nearest hour at that time, noting AM and PM. 

2.  Repeat above instructions to set ”Start Time” to desired time of day  

  to begin watering.

3.  Use left and right (        ) arrow buttons to set “How Often” (watering  

no watering is needed. 

  frequency) to select an hour or day increment. (8 hours = 3 times per  

  day, 2 days = every other day)

4.  Use left and right (        ) arrow buttons to set “How Long” (watering  

  duration) to select a minute or hour increment.

5.  Activate the watering program by pressing the Program On/Off button; 

  a horizontal bar will be displayed to signify the program is on. Press 

  the Program On/Off button again to disable the program.

NOTE: To avoid accidentally changing the current program, the arrow 

buttons will be “locked out” or inaccessible if “Program On” is selected.
To create a new program, press Program On/Off button if necessary to 

disable the current program. Press (        ) arrow buttons to desired 

settings and press Program On/Off button again to select the newly 

created program.

To avoid watering during the current program, press the Program On/Off 

button to disable the program and press again to enable the program 

when desired.

Press the Manual On/Off button to water manually. Press the button 

again to stop watering; otherwise the timer will water for 30 minutes and

automatically shut off.

A fresh battery should last one watering season. When the battery is 

weak, the low battery indicator bar will show. If this occurs during a 

watering program, the unit will automatically shut off and discontinue 

running the program. The valve will not reopen until a fresh battery is 

installed. After inserting a new battery, the timer must be re-programmed 

to resume watering. 

To prolong battery life, the LCD will “sleep” after approximately 4 minutes of 

button inactivity. “Wake” the unit by pressing either the Program On/Off or 

the Manual On/Off buttons.

®

Tool required:  Phillips head screwdriver.

Remove the two  small screws and remove the battery cover. Insert two 

(2), 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.

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 site of the Timer/Receiver, but the range may 

be diminished somewhat.

To insert the Sensor, first dig a pilot hole about the 

same size as the probe.  The hole must be deep 

Continue to monitor your particular watering requirements based on 

weather conditions and overall plant health.

Slide the receiver onto the rail along the top 

of your compatible Melnor® AquaTimer®.  

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 AquaTimer®.  

Note the orientation of the three (3) pins to 

be certain the cable is attached correctly.

t u

t u

t u

t

u

enough to bury the entire sensor probe.  (Illustration)  Remove any large 

rocks or other debris from the soil that is removed from the hole.  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 firmly into place. It is important that 

the entire front surface of the probe be in contact with the soil.

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 soil is too dry, select the wetter setting (three droplets).  

Sprinkler and hose not included.
Requires (1) 9V & (2) AA batteries.

After installing the receiver, press either the “Program” or “Manual” 

button once to wake the timer. If the AquaSentry™ system is working 

properly, an antenna symbol should appear 

as shown (Illustration…3015 and 3060) 

within 35 seconds indicating communication 

between the Sensor, Receiver and 

AquaTimer®.   If the symbol displays 

steadily, your AquaSentry™ is working 

properly and monitoring the soil’s moisture 

level.

If the antenna symbol is flashing, 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.

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 off.   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 flash, the batteries in the 

Sensor are weak and need to be replaced. 

and on, the user is encouraged to try to correct the interfer

ence by one or 

more of the following measur

es:

.. Reorient or relocate the r

eceiving antenna.

.. Increase the separation between the equipment and the r

eceiver.

.. Connect the equipment into a differ

ent outlet or a circuit dif

ferent fr

om that  

 to which the r

eceiver is connected.

.. Consult the dealer or an experienced radio/TV technician for help.

3. This device complies with Part 15 of the FCC Rules. Operation is subject 

to the following two conditions: (1) this device may not cause harmful 

interference, and (2) this device must accept any interfer

ence received, 

including interference that may cause undesir

ed operation.

TM