DIG LEIT-1 User manual

Ambient light powered,
smart irrigation controller
LEIT-1
INSTRUCTION MANUAL

Table of conTenTs
INTRODUCTION ……………………………………………………………… 3
1. About the controllers …………………………………………………… 3
2. Component identification ……………………………………………… 4
3. System components …………………………………………………… 5
4. Valve installation ……………………………………………………… 6
5. Programming ………………………………………………………… 8
6. Setting time and date …………………………………………………… 8
7. Setting watering day schedules ………………………………………… 10
8. Setting watering start time ……………………………………………… 12
9. Setting watering run times ……………………………………………… 14
10. Setting the SimpleSmart™ option ………………………………………… 15
11. Setting seasonal adjustment (monthly budget) …………………………… 18
12. Rain delay setting ……………………………………………………… 19
13. Events off setting ……………………………………………………… 20
14. Manual watering ……………………………………………………… 21
15. Connecting a rain sensor ……………………………………………… 22
16. Maintenance, troubleshooting and repairs ……………………………… 24
17. Warranty ……………………………………………………………… 26
18. Technical assistance …………………………………………………… 27
2

Thank you for purchasing DIG’s LEIT-1™ ambient light powered irrigation controller.
1. abouT The conTrollers
The LEIT-1™ is a one-station, ambient light (solar) powered smart controller that
uses a patented energy management system to power the controller day and
night. The controller requires no batteries, AC power or direct sunlight and can be
installed above grade anywhere in the landscape.
The controller employs the latest in water conservation features and can be
pre-set to automatically adjust the watering durations according to regional
seasonal changes.
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2. componenT IDenTIfIcaTIon
1. Solar PVM
2. LCD screen
3. 7 button keypad
4. Rain sensor connection
5. Quick reference label
6. Collapsible solenoid wire
7. DC Solenoid
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3. sYsTem componenTs
LCD Display
1. Time and Date - Indicates current time and day
2. Set Watering Days - Choose either specific days, odd/even days, or up to once
every 30 days
3. Start Time - Up to 5 start times per day available
4. Run Time - Watering duration from 1 minute to 6 hours
5. Manual Run - Appears when manual button is pushed
6. Set ET - Used to set one of the 20 SimpleSmart™ presets
7. Set Monthly Budget - Seasonal adjustment setting (0%-200%) in 5%
increments or to fine-tune SimpleSmart™ programming
8. Rain Delay - Delay irrigation setting from 1>99 days with automatic restart
9. Events Off - Suspends watering for any month or any specific day within
the month.
10. Power Level - Represents current charge level
11. Sensor - Appears only when sensor is connected and active
12. Watering - Appears when valve is open
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Control Buttons
Select programming mode
Turn ON/OFF program
Start/stop a manual cycle
Move left/right to select a value
Raise/lower the selected value
4. ValVe aDapTer InsTallaTIon
1. Shut off the main water supply
2. Remove the existing solenoid if applicable.
NOTE: If adapting to an IRRITROL valve, remove the solenoid but leave the
existing solenoid adapter installed.
3. Select the appropriate solenoid adapter associated with the valve. (see chart A)
4. Screw the solenoid adapter into the valve bonnet by hand, tighten with pliers if
necessary – but do not over tighten.
5. Thread the LEIT-1 solenoid into the valve adapter. Hand tighten only.
6. Turn the main water supply on and pressurize the valve; the valve may discharge
water momentarily but should then shut off.
7. Test the controller and the installation by pressing the button or see
section 14 to perform a manual run.
To turn the valve on via the solenoid, lift the LEIT-1™ controller from the
solenoid and turn the solenoid counter clockwise 1/2 to 3/4 of a turn, or until
you hear or see water flowing through the valve. To turn the water off, turn the
solenoid clockwise 1/2 to 3/4 of a turn and wait for the a few seconds for the
valve to close.
8. Program the LEIT-1™ controller (see section 5).
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solenoid
adapter
chart a
Model Compatible Valves
30-920* 

30-921
included


30-922
included


30-923* 
30-924
included


30-925* 

30-926* 

*AVAILABLE THROUGH YOUR DISTRIBUTOR
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5. proGrammInG
In order to program the LEIT-1™, you must first let the unit sit out in the light to
charge. In bright light conditions (full sun) this will take under 30 minutes.
In shaded conditions this could take up to 2 hours.
This section explains the programming features, and the steps necessary to assign
irrigation schedules. To program the controller use the to select the desired
programming mode, the to make the entry flash and the buttons to
change the value.
NOTE: Only a flashing value can be changed.
NOTE: If the last data entered stops flashing, press again to resume
programming and repeat the steps.
6. seTTInG TIme anD DaTe
The controller can display the time in either a 12 or 24 hour format.
To change the time format, from the home screen:
1. Press and hold the button for three seconds until the display switches
format (AM/PM disappears).
SETTING THE CURRENT TIME AND DATE
To enable the controller to operate properly, the current time and date must
be set.
1. Press the button, until the icon appears along with the time and the day
of the week.
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2. If the current time has not been set and needs to be updated press and the
hour digit starts flashing.
3. To set the current hour, press or (note AM and PM designations).
4. To set the minutes, press again and the minute digit starts flashing. Press
the or to set the current time in minutes.
5. Repeat the steps to set the current date including, month, day and year. When
the date is selected and updated, the day of the week will be update at the
same time to correspond with the date.
MONTH DAY YEAR
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6. Press to proceed to the next step SET DAYS or review the program.
Press to move backward.
7. seTTInG WaTerInG DaY scheDules
Option 1 - Setting Specific Days of the Week:
This setting determines which days the LEIT-1™ controller will operate. Choose
either watering on specific days of the week, EVEN/ODD days or cyclical from daily
up to once every 30 days. The controller’s default setting is to water on all specific
days of the week.
For example, if you want to water every Tuesday, Thursday and Sunday:
1. Press the button until the icon and the days of the week appear on
the screen.
2. Press once and M (for Monday) starts flashing.
3. Press, and underscore under M (Monday) disappears. Monday is
de-selected.
4. Press twice and W (for Wednesday) starts flashing.
5. Press and the underscore under W (Wednesday) disappears. Wednesday is
de-selected.
6. Press twice and F (Friday) starts flashing.
7. Press and the underscore under F (Friday) disappears. Friday is de-selected.
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8. Press and the underscore under Sa (Saturday) starts flashing.
9. Press and the underscore under Sa disappears. Saturday is de-selected.
10. Press the button to proceed to the next step or to set even/odd days.
Option 2 - Setting Even or Odd Days:
To select EVEN days, ODD days or cyclical days from one day up to every
30 days refer to the following example.
Example: setting the controller to water every 10 days:
1. Press the button until the icon and the days of the week appear.
2. Press and to skip all the days of the week (underscore must be
removed beneath all days).
3. Press and EVEN appears flashing. (To select ODD days press )
4. Press again and 1 DAY appears flashing. To select the number of days
between watering of 10 days, press until 10 appears on the display.
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5. To return to a weekly schedule, Press and the program returns to the
weekly schedule for selecting the day of the week.
6. Press the button to proceed to the next step START TIME or to review
the program.
8. seTTInG WaTerInG sTarT TIme
The LEIT-1™ smart controller can have up to five separate irrigation start
times per day.
To set a start time,
1. Press the button until the icon appears. START 1, displays OFF or the
last start time programmed in START 1 appears.
2. Press and OFF (or the first start time programmed) begins flashing.
3. To set the desired first start time hour (note AM and PM designations), press
or .
4. Press and the minutes start flashing.
5. Press or and set the desired start time minutes.
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6. Press again, the second start time and OFF (or the last start time
programmed) appear flashing.
7. To set the desired second start time hour (note AM and PM designations), press
or .
8. Press again and the minutes begin flashing, press or to select the
watering start time in minutes. Repeat the steps to set the third and if needed
the fourth and fifth start times. During programming, the screen also shows
which days the controller will operate.
Press the button to proceed to the next step RUN TIME or to review
the program.
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9. seTTInG WaTerInG run TImes
Note: If you have already set a SimpleSmart™ ET preset (example: SP02) and then
change the run time, your SimpleSmart™ program will be turned OFF. You must
reactivate the SimpleSmart™ programming each time you adjust your run time
(see section 10).
This setting determines the length of time the LEIT-1™ smart controller will allow
the valve to remain open (duration is from 1 minute up to 6 hours). For example,
setting watering run time to 10 minutes on certain days of the week will program
the controller to turn the water on for 10 minutes on each of the days chosen and
at every start time selected.
To set the watering run time :
1. Press the button until the icon appears and OFF or the last run time
setting appears.
2. Press the button, and OFF (or the last run time programmed) appears with
hours flashing.
3. To set a desired watering run time in hours, press or and select the
number of hours.
4. If only watering duration in minutes is required, press to skip the hour digit,
and the minutes will start flashing.
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5. To set the desired watering duration in minutes (example of 10 minutes), press
or to select minutes. When programming the watering duration the
screen will also show the days the controller will operate.
NOTE: If the last data entered stops flashing after 10 seconds, press again to
resume or to move backward.
Press the button to proceed to the next step SET ET or to review
the program.
10. seTTInG The sImplesmarT™ opTIon (seT eT)
The LEIT-1™ smart controller’s main feature includes twenty preset programs for
sprays and drip irrigation based on three years of historical evapotranspiration (ET)
from various climate regions.
How DIG’s LEIT-1™ smart controller operates using Historical Evapotranspiration (ET):
After programming the watering schedule, watering start time and watering duration,
the user can select one of the preset SimpleSmart™evapotranspiration (ET) programs
for spray or drip irrigation systems. See the color map in the centerfold of this manual
to select the appropriate pre-set for your location and type of system to reference
CHART A on page 16 and choose from the region description.
Selecting SP01 through SP20 sets the LEIT-1™ controller to water a predetermined
number of minutes per month. The amount to water is pre-programmed into the
controller and is determined by which program (SP) is selected and by the month.
If you have already set a SimpleSmart™ ET preset (example: SP02) and then
change the run time, your SimpleSmart™ program will be turned OFF. You must
reactivate the SimpleSmart™ programming each time you adjust your run time (see
section 10).
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NOTE: If using one of the SimpleSmart™ presets we recommend evaluating
the plants’ health for the first month and making adjustments to the system
as needed. If an adjustment or fine tuning of the SimpleSmart™ programming
is required, this adjustment can be made for each month in the SEASONAL
ADJUSTMENT (%) SETTING (see section 11).
proGram reGIons IrrIGaTIon meThoD
SP01 Cool Mediterranean Drip Systems
SP02 Cool Mediterranean Sprinkler Systems
SP03 Humid Continental Drip Systems
SP04 Humid Continental Sprinkler Systems
SP05 Warm Mediterranean Drip Systems
SP06 Warm Mediterranean Sprinkler Systems
SP07 Humid Sub-Tropical Drip Systems
SP08 Humid Sub-Tropical Sprinkler Systems
SP09 Highlands Drip Systems
SP10 Highlands Sprinkler Systems
SP11 Dry Inland Valleys Drip Systems
SP12 Dry Inland Valleys Sprinkler Systems
SP13 Tropical Wet & Dry Drip Systems
SP14 Tropical Wet & Dry Sprinkler Systems
SP15 Tropical Wet Drip Systems
SP16 Tropical Wet Sprinkler Systems
SP17 Semi-Arid Drip Systems
SP18 Semi-Arid Sprinkler Systems
SP19 Arid Drip Systems
SP20 Arid Sprinkler Systems
CHART A - SELECTING HISTORICAL ET PROGRAM
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For example:
The user entered watering run time will be adjusted monthly based upon the
forecast ET pattern for the selected region.
By selecting SP02, the controller may adjust the programmed run time of 10
minutes in the month of January to 3 minutes, or less. This reduces the irrigation
run time by 7 minutes, providing a water savings of nearly 70% for the month
of January.
To activate the SimpleSmart™ ET feature:
1. Press the button until the icon appears and OFF appears.
2. Press and OFF (or the last SP program #) appears.
3. To select a desired SimpleSmart™ preset press or and select one of the
twenty programs from the list using one that is similar to your climate region and
irrigation method (see map in centerfold or reference Chart A).
4. To deactivate the preset program, press and the program # appears flashing.
5. Press until OFF appears.
Press the button to proceed to the next step SET BUDGET or to review
the program.
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11. seTTInG seasonal aDJusTmenT (monThlY buDGeT)
The amount of water required by plants varies throughout the year. The Seasonal
Adjustment percentage feature can be utilized to alter the programmed watering
run time on a monthly basis.
This program features two options:
A. It can be used as an adjustment to the programmed run time by altering the
programmed watering duration on a monthly basis.
B. It can be used to modify the total run time setting of the SimpleSmart™
programming per month by percentage.
To set seasonal adjustment in %:
1. Press the button until 100% and the current month # appears.
2. Press the button and the 100% appears flashing.
3. To set the desired seasonal adjustment % (0-200%), press or .
Example, if a 20 minute duration is programmed, and then the monthly budget
is changed from 100% to 50%, the duration will now be 10 minutes for the
selected month.
4. Repeat the steps to set the desired seasonal adjustment % for each month by
pressing and following the previous steps for each month.
Press the button to proceed to the next step RAIN DELAY or to review
the program.
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12. raIn DelaY seTTInG
The Rain Delay setting is used to temporarily suspend all irrigation for a defined
number of days. For example, during rainy weather regularly scheduled programs
can be turned off from 1-99 days. At the end of the designated period, regularly
scheduled programming will resume automatically.
To set a temporary suspension of the program:
1. Press the button until the icon appears and OFF appear.
2. Press the button and OFF starts flashing.
3. To set the desired temporary suspension of the program (1-99 days), press
or .
4. The temporary suspension of the program can be cancelled at any time by
re-entering Rain Delay screen and changing the setting to OFF. (Press
or until OFF appears.)
Note: OFF appears in between numeric value of 99 and 1.
Press the button to proceed to the next step EVENTS OFF or to review
the program.
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13. eVenTs off seTTInG
This mode allows the user to program the timer to not water during specific
months of the year, or to program the timer to not water on specific days of the
week during a specific month.
To turn off specific days of a month:
1. Push the button until the desired month is selected and DAYS appear above
the symbol. The number of the month is on the left (1 = January,
12 = December).
2. Push the button until the desired day of the week flashes.
3. Push the to remove the underline under the day of the week.
During the selected month, watering will not occur on the days of the week
without the underline.
To turn off an entire month:
1. Push the button until the icon appears.
2. Push the button through each day of the week until the MO appears above
the icon.
3. When On is flashing for the desired month to turn off, push the button
and the word OFF will appear. The selected month is now turned off, and no
watering will occur during the entire month.
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