Hit Products Logic 3 User Manual
Logic 2
and
Logic 3
Two Wire Irrigation Controllers
P.O. Box 929, 556 S. Mirage Avenue
Lindsay, CA 93247
For Technical Assistance: 800-468-0071 ext. 331
MADE IN THE USA
UPDATED 3/03/03
Read Entire Instruction Booklet Before Installation
TABLE OF CONTENTS
1. Installing the Logic 2 and Logic 3, Valve Wiring
2. Valve Wiring
3. Selecting Proper Wire Size
4. Wire Connections
5. Testing Controller Surge Protect ion Board
6. Controller Lightning Protection
7. Features and Programming the Logic 2 and the Logic 3
8. Pre Wet, Fertigation and Setting Pause
9. Start Times, Total Run Times and Calendar
10. Definitions and Looping Program 6
11. Program/Master Valve ON/OFF, Test Cycle
12. Semi/Manual/Program Clear, Rain Delay, Run
13. Programming of Logic Receivers / Diamond Settings
14. Receiver Programming Instructions
15. Receiver Number Identification Tags, “Do’s & Don’ts”
16. Rain OFF Wiring Instructions
17. Rain OFF Diagram
18. Wire Chart
19. Wire Chart
20. Common Field Wiring Example
21. Field Wire Example-Pump Start Relay
22. Field Lightning and Surge Protection Wiring Diagram
Installation and field wiring instructions.
Read booklet completely before beginning installation.
NOTICE: Before installation, receivers must all be
programmed. See page 14 for receiver programming
instructions
INSTALLING THE LOGIC
Mounting the controller. . .When seleting the controller installation location, make
sure controller and all related wiring is a minimum of 15 feet from any high
voltage control boxes, pumps or any high voltage equipment. This
irrigation controller is a computer and should be installed accordingly.
When mounting the LOGIC indoors, notice the "keyhole" shaped mounting slot
as well as 2 mounting holes on the back of the controller. Use the template
provided to locate mounting screw locations. Remove the four face plate screws
and two lower panel screws to access enclosure mounting screws. To attach to
wall studs, use a #10 screw, leaving 1/4" of the shank exposed to slip into the
"keyhole" slot. To additionally secure the controller, drive additional screws
through the bottom mounting holes into the stud or cross bracing.
When mounting the LOGIC outdoors, use the same procedure as above. When
attaching the controller to hollow walls, masonry, or cinder blocks, use
appropriate toggle bolts, masonry shields or compression drive bolts. For
additional weatherproofing, run a silicon bead around the case between the
controller and the wall. It is also recommended to fill mounting holes with silicon
as well, to prevent water or insects from entering the controller.
The LOGIC should be hard wired to the transformer by a qualified electrical
technician. Use an approved GFI device and utilize proper grounding
techniques using the green wire from controller transformer. This will help
assure safety as well as performance and reliability of the Logic controller.
The manufacturer’s warranty becomes invalid without proper grounding as
per local code. See enclosed “Installation Diagram for Primary Wiring”.
Warning! When connecting the field receivers, make sure there is no
power to the printed circuit board, controller and/or the receivers; this will
prevent the shorting of receivers and controller.
Unscrew the LOGIC bottom terminal plate and route two (or four) field wires
through the hole at the bottom of the controller. Secure each 2-wire run under the
appropriate terminal on the terminal strip labeled “Line 1” and “Line 2”. If using
both outputs “Line 1” and “Line 2”, keep each 2 wire set independent. Do not mix
output “Line 1” with output “Line 2”. It is strongly suggested to use different
colored wires for each wire used.
The Logic 2 an d Logic 3 Terminal Strip is labeled as follows:
1
VALVE WIRING
Wire
The field wiring from the controller to the receivers consists of either one or two, 2-wire
runs, which connect, in series, to each valve location. Each 2-wire run is totally
independent of the other relative to wire size requirements and the number of valves
operating simultaneously. Both 2-wire runs receive and output the exact same
information. The purpose of 2 independent 2 wire runs are for reducing the potential
amount of “back tracking” when valves are located in more than one general direction
from the controller. Theoretically, with the Logic controller located in the center of an
irrigation project, one 2-wire run would go one direction and the other 2-wire run could
go the other direction. “Line 1” is one 2-wire run; “Line 2” is the second available 2-wire
run. The 2-wire runs start at the controller and end at the last receiver/valve for that wire
run. Do not loop or make a complete connected circle.
For the main 2-wire runs, it is very important to size the wire properly.
Consideration for designing the proper wire size includes the total wire distance
from controller to the farthest receiver and how many valves will be operating
simultaneously. Wire size must be designed using Ohm’s law for any
application.
The field wiring should consist of one or two continuous main 2 wire runs starting at the
controller terminal labeled “Line 1” or “Line 2” continuing to the last receiver/valve of
that wire run. If using the dual output feature, use one continuous length of wire
independently from each output “Line 1” and the second independent 2 wire run from
“Line 2”. Every receiver is to be connected directly anywhere on one of your main two wire continuous runs. Do not tee or branch the main two wire runs. To access remote
valve(s), attach the two red receiver wires (one red wire to each field wire) of the main
two wire run. Extend the black solenoid leads from the receiver and attach to the solenoid
at the valve. The distance from a receiver to the solenoid is limited only by standard wire
sizing/distance and voltage drop parameters. From the controller to the solenoid the
voltage can not exceed 7 voltage loss. The last receiver installed is the end of the main
two wire run. You may operate a maximum of four of the same numbered receivers or
four valves maximum of any random numbered receivers at any one time. This will
affect the wire size, as more power draw will be needed. (See wire-sizing guide.)
Use the following formula when designing your wire size for each Logic 2 wire run.
Consult attached wire charts to insure proper wire gage. Minimum wire size and type is
14 Ga. Always use direct bury, heavy jacket, solid core copper wire
.
Wire Size Formula is: VD = C x R x (2L) / 1000
"Ohms Law" Voltage Drop = Current x Resistance in Ohms
VD = Voltage Drop
C = Current (Solenoid Amperage Draw)
R = Resistance (Wire Size “Voltage Loss” Factor)
L = Length of distance between controller and valve in feet
2
Ohms Per
Size
1,000 Ft.
14 2.580
12 1.620
10 1.020
8 0.641
6 0.403
4 0.253
The Logic is designed to allow for a 7 volt loss in the field wiring. By increasing
the wire size you decrease the voltage loss. The rule is the bigger the wire, the
smaller the voltage loss. Use only solid copper wire manufactured for Direct
Bury Applications. To calculate the voltage drop, use the charts on pages 18 and
19. For a maximum of one valve only operating simultaneously, the following
chart applies.
Total Length of Valves Operating Wire Size
Each 2 Wire Run Simultaneously Gauge MM2
Feet Meters
0-2,500 0-762 1 Valve #14 2.5
2,500-5,000 762-1,525 1 Valve #12 4
5,000-7,500 1,525-2,286 1 Valve #10 6
Calculating Voltage Drop and Proper Wire Sizing
Figure the wire distance from the controller to the farthest valve. Find that
distance by adding the distances on the chart and subsequent voltage drops.
Add these voltage drops to figure the total voltage drop at that wire size. Should
the voltage drop exceed 7.0 volts, the next larger sized wire should be calculated
until the voltage drop is equal to or less than 7.0 volts. For multiple valves
operating simultaneously, you must calculate and add the loss at each valve.
See example 1 and 2 below.
Example 1
Logic to V1 (Valve 1)
PROGRAM RECEIVER
1000´
PRE WET / FERTIGATION
MASTER ON
FERTIGATION ON
CALENDAR ODD / EVEN
MASTER CLEAR
Logic 1
To Valve
Controller
to V1
Total Voltage Drop 1.290 O.K. use 14 Ga
24 Volts less 1.290 = 22.71 Volts
Chart 1
.35 amps inrush charts Voltage Loss .25 amps holding chart Voltage Loss
Length 1 Valve 2 Valves 3 Valves 4 Valves Length 1 Valve 2 Valves 3 Valves 4 Valves
Wire Size 14 2.58 R factor Wire Size 14 2.58 R factor
100 0.181 0.361 0.542 0.722 100 0.129 0.258 0.387 0.516
200 0.361 0.722 1.084 1.445 200 0.258 0.516 0.774 1.032
300 0.542 1.084 1.625 2.167 300 0.387 0.774 1.161 1.548
400 0.722 1.445 2.167 2.890 400 0.516 1.032 1.548 2.064
500 0.903 1.806 2.709 3.612 500 0.645 1.290 1.935 2.580
600 1.084 2.167 3.251 4.334 600 0.774 1.548 2.322 3.096
700 1.264 2.528 3.793 5.057 700 0.903 1.806 2.709 3.612
800 1.445 2.890 4.334 5.779 800 1.032 2.064 3.096 4.128
900 1.625 3.251 4.876 6.502 900 1.161 2.322 3.483 4.644
1000 1.806 3.612 5.418 7.224 1000 1.290 2.580 3.870 5.160
14 Ga
Table
1000´@1
valve
Voltage drop
from Chart
1.290 V.D.
Example 2
Logic to V1 V1 to V2 V2 to V3
500´ 700´ 1000´
Chart 2
Logic 1
To Valve
Controller to
V1
V1 to V2 700´@ 2
V2 to V3 1000´@ 1
Total Voltage drop 3.159 O.K. use 12 Ga
24 Volts less 3.159 = 20.841 Volts
12 Ga
Table
500´@ 3
valves
valves
valve
Voltage drop
from Chart
1.215 V.D.
1.134 V.D.
0.810 V.D.
.35 amps inrush charts Voltage Loss .25 amps holding chart Voltage Loss
Length 1 Valve 2 Valves 3 Valves 4 Valves Length 1 Valve 2 Valves 3 Valves 4 Valves
Wire Size 12 1.62 R factor Wire Size 12 1.62 R factor
100 0.113 0.227 0.340 0.454 100 0.081 0.162 0.243 0.324
200 0.227 0.454 0.680 0.907 200 0.162 0.324 0.486 0.648
300 0.340 0.680 1.021 1.361 300 0.243 0.486 0.729 0.972
400 0.454 0.907 1.361 1.814 400 0.324 0.648 0.972 1.296
500 0.567 1.134 1.701 2.268 500 0.405 0.810 1.215 1.620
600 0.680 1.361 2.041 2.722 600 0.486 0.972 1.458 1.944
700 0.794 1.588 2.381 3.175 700 0.567 1.134 1.701 2.268
800 0.907 1.814 2.722 3.629 800 0.648 1.296 1.944 2.592
900 1.021 2.041 3.062 4.082 900 0.729 1.458 2.187 2.916
1000 1.134 2.268 3.402 4.536 1000 0.810 1.620 2.430 3.240
WIRE CONNECTIONS:
One of the most critical installation requirements of a Logic 2 wire system is the quality
of your wire connections. If you follow these directions you will have a reliable,
dependable control system for many years. It is suggested to soldier all receiver (red
wire) connections to your main two-wire run. Next install the soldiered two-wire
connection in a waterproof underground connector housing. When soldering is
impractical, a waterproof “dry-type” connection such as the Hit Products DBC-Y or
DBC-R or 3M DBY™ or DBR™ wire connector is required. Either of the above
mentioned products will provide an uncontaminated, dry connection and then the splice is
submerged in a waterproof gel-filled housing.
4
Do not use pre-filled wire nut connectors as they will impede the transfer
of the signal through the wire splice.
TEST BEFORE BACK-FILLING TRENCH.
To easily test for communication and wire integrity, connect each receiver to the
field wiring at each planned location. It is not necessary for receiver to be
attached to solenoid/valve for test, but O.K. if already connected. Do not allow
black receiver wires to touch each other (short or ground) when testing.
Manually sequence controller through each station number for minimum of 30
seconds, checking each activated receiver in the field for a continuously
activated bright LED light on each receiver. A continuously activated bright LED
light on receiver during station activation confirms satisfactory communication.
Modular Surge Protection Board
The surge protection board is attached directly underneath the large main
controller printed circuit board. This board and its components are like a
sophisticated fuse. It will blow in an attempt to save the main circuit board from
destruction by line surges mainly created by lightning. It is connected to the main
board with a simple plug for easy removal for testing and replacement if
necessary.
LOGIC 2 and LOGIC 3 Internal Surge Protection
The terminal connectors for the field and ground wires located on the internal
surge protection board will accept up to 10 gage wire allowing the field wiring to
be directly connected. Access is made by removing the stainless steel panel
held by two screws directly below the face plate. Note : Make sure all wiring
connectors are tight and it is recommended to use only soldered connections or
dry-type DBC waterproof connectors for all main 2-wire splices.
PROGRAM RECEIVER
MASTER ON
FERTIGATION ON
GFI CIRCUIT 110 VAC
THIS CONNECTION
SHOULD BE MADE BY A
QUALIFIED TECHNICIAN.
10´ GROUND ROD -Keep ground moist.
PRE WET / FERTIGATION
CALENDAR ODD / EVEN
MASTER CLEAR
BLACK
WHITE
GREEN
5
BLUE LINE 2
BLUE LINE 2
RED LINE 1
RED LINE 1
?
?
?
?
Controller Lightning Protection
It is recommended that, in environments where either power surges or direct lightning
strikes are possible, the following installation of grounding protection be followed on the
primary input power supply. Every Logic controller is supplied with a heavy duty-surge
protection kit that will protect yo ur controller against power surges on the primary side.
To activate, it must be installed per local grounding codes. In case a power surge exceeds
the limitations of the board, the surge protection kit will blow and a new surge protection
replacement kit can easily be installed without the need to replace the whole controller
(Part #L-SPD-F).
Field Wiring/Receiver Lightning Protection
As with any electronic equipment buried in the field, it is recommended to use
surge protection devices every 300 – 500 feet along the main 2 wire run and at
the end. These model #L-SPD-F, field surge protection kits are to be installed at
same convenient location as any receiver. Each L-SPD-F does require a
grounding rod-not included with the Hit Products model #L-SPD-F. Attach the
green #L-SPD-F wire to the grounding rod. See diagram on page 22.
Pump Start Relay
When using a pump start relay, the relay shall be a 24 VAC coil with a maximum
inrush of .35 amps and holding .25 amps. The relay will act as a slave to the
magnetic relay to control the pump motor. You can use up to a 5hp Hit Products
pump start relay attached directly to the relay terminal. See diagram on page 21.
Fertigation
The controller is fitted with a separate relay to operate a 24VAC system with a
maximum inrush of .35 amps and holding .25 amps at 24VAC, for application of
fertilizer or other material injection systems. A slave relay should be used to
operate any auxiliary pumps or injection systems exceeding the above power
requirements.
Read This First! The LOGIC Controllers are so easy to program because the four
sets of black up/down buttons correspond to whatever is directly above them in the
display. You can toggle between ON and OFF, set hours, minutes, and seconds, or
even select program numbers, valve numbers, and start times simply by using these
up/down buttons located directly under their functions. For more advanced special
feature functions look to right of up/down buttons. These advanced features may be
accessed by having dial in corresponding number to that number in box to the left of function.
**************************************************************************************
“NOTE”
When you first install your LOGIC 2 or LOGIC 3 controller, press Master Clear to clear
all possible information stored in the unit. Put dial in position 10, Press top right
Up/Down key under “CLR” OFF. Push Advanced Feature button. Controller will
automatically clear ALL programmable data except current date and time.
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