Irritrol Junior MAX User Manual
stations
Operating Instructions
Junior Max (JR Max™)
Get more done
TM
Controller
Thank you for purchasing this advanced, highly featured Irritrol Junior MAX
controller. The Junior MAX is the latest addition to the Irritrol Junior Series.
The Junior Plus, Junior DC and now the Junior MAX make this the most versatile,
highly featured and economical controller series on the market today.
The following pages will describe the features of the Junior MAX and give you
clear directions for using them and getting the most out of your new controller.
We at Irritrol are confident that you will be impressed with the power of
the Junior MAX and pleased with its quality and value. If you have any suggestions for
other control features that you’d like to see in one of our controllers or a future product,
please write to us at Irritrol. We’d love to hear from you!
Irritrol Irrigation Systems
International Product Manager
5825 Jasmine Street
Riverside, CA 92504 U.S.A.
_________________
_____________________________________
About the Junior MAX memory
This controller is equipped with "on board" back up battery that will keep the program
memory for a few years in case power is not available. If you wish to program the
controller without connecting it to AC power, install the 9 volt alkaline battery. The 9 volt
battery will turn on the display. To turn on the programming guide light, press one of the
keys. (any key) The programming guide light will turn off after 10 seconds if no key is
pressed.
Automatic Circuit Breaker
The Junior MAX controller is equipped with an automatic circuit breaker making fuse
replacement a thing of the past. A short circuit in the field wiring or the valve solenoid
will cause the automatic circuit breaker open and stop electrical output. The “24V” will
flash and the red “AUTO” light will blink. If the fault isn’t corrected by the next start
time, the controller will initiate another watering cycle and advance through the set
stations until it encounters the station with the electrical fault. The program will again
terminate and display the blinking “24V” icon and the blinking red “AUTO” light. To
verify that there is a short circuit problem, go to the manual mode and start the station. If it
doesn’t start or turns off before the set run time, troubleshoot the field wiring and valve
solenoid.
Power failure indication
During a power failure the “24V” will start flashing, if a 9 volt battery is connected.
"24V" will stop flashing as soon as power resumes.
Electrical Specifications:
Input power:
120 VAC, 50/60 Hz (Plug-in transformer, CUL approved)
230 VAC, 50/60 Hz (Plug-in transformer, CE Mark)
240 VAC, 50/60 Hz (Plug-in transformer, SAA)
18 W (0.75 amps) maximum
Station Output Power:
24 VAC
6 VA (0.25 amps)
per station maximum
6 VA (0.25 amps)
pump start/master valve
12 VA (0.50 amps) total load
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INSTALLATION INSTRUCTIONS - INDOOR MODELS:
Programming
guide light
Year
Month
Day
Time
Master
Valve
Su Mo Tu We Th Fr Sa
Station
Start
System off
Semi-Auto
Manual
% Scaling
AUTO
Set Time/Day
Run Times
Water Days
Start Time
RESET
SENSOR
LCD INLAY -
To place or replace
look at instruction
inside the plastic bag.
9 volt
battery drawer
Reset electronic fuse
TRANSFORMER
install in a
protected area.
common to all valves
Remove the lower cover. Place the unit on the wall using the top screw slot. Level
the controller, then insert screw into the lower screw hole under the terminal block.
Connect the solenoid wires to the terminal block. Connect one wire from the solenoid to
its respective station number on the terminal block and the other wire to the C-common
terminal. Connect the transformer wires to the 24 VAC terminal.
Note: A 9 VDC battery must be installed for proper operation of the controller. The 9
volt battery compartment is located on the right side of the case. It is marked “Push”. Push
it to release the battery drawer. The 9 volt battery powers the LCD display in the absence
of AC power and allows “Arm Chair Programming”. Program information is retained
during power outages by an on-board lithium battery.
NOTE: Only after all the wiring is completed and checked should the transformer be
plugged into AC power.
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INSTALLATION INSTRUCTIONS - OUTDOOR MODELS:
Remove the lower cover of the Junior Max controller by sliding it down. Place the unit on
the wall using the top keyhole screw slot. Level the controller and then insert screws into
one or more of the three lower screws holes at the cabinet bottom. Drive the screws
through the plastic flashing that keep the cabinet weather resistant. If installing the
controller on drywall or masonry, install screw anchors to prevent the screws from
loosening. Connect the solenoid wires to the terminal block through the 12mm (1/2”) hole
in the right side of the cabinet bottom. If the solenoid wires are being installed in conduit,
there is a knock-out on this hole that will accept a 24mm (1”) male conduit adapter.
Connect the wires as shown for the indoor model. Next connect the power wires.
Warning: AC power wiring must be installed and connected by qualified
personnel only. All electrical components and installation procedures must comply with all
local and national electrical codes. Some codes may require a means of disconnection
from the AC power source installed in the fixed wiring and having a contact separation of
at least 3mm (0.120”) in the line and neutral poles.
Make sure the power is OFF prior to connecting the controller.
The hole on the left side of the cabinet bottom accepts a 12mm (1/2”) male conduit adapter.
Route the power and equipment ground wires from the power source, through the conduit
and into the transformer connector compartment. Note: The terminal block accepts wire
size up to 4mm2 (12 AWG). Remove 10mm (3/8”) of insulation from the wire ends.
Using a small flat bladed screwdriver, secure the wires as follows: Line or Line 1 (L1) to
L, Neutral or Line 2 (L2) to N and Equipment Ground to G. Install compartment cover.
Apply power to the controller.
9 VDC Battery. The 9 volt battery compartment is located below the 24VAC terminals.
The 9 volt battery powers the LCD display in the absence of AC power and allows
programming without AC power. Program information is retained during power outages
by an on-board lithium battery.
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