Chamberlain LJ8900W User manual

For Light Duty Commercial Use
Install On Sectional Doors With
Torsion Assemblies Only
NOT FOR RESIDENTIAL USE
Light-Duty Jackshaft Operator
for Sectional Doors
Model LJ8900W
LiftMaster
300 Windsor Drive
Oak Brook, IL 60523
• Please read this manual and the enclosed safety materials carefully!
• The door WILL NOT CLOSE unless the Protector System®and cable tension monitor
are connected and properly aligned.
• Periodic checks of the operator are required to ensure safe operation.
• The model number is located on the front cover of the operator.
• DO NOT exceed 10 complete cycles of door operation per hour.
This product is to be installed and serviced by a trained door systems technician only.
This product may require adjustments to door springs and/or track configurations. This
product is not intended for use on low headroom tracks with outside pickup drum or
doors utilizing extension springs.
2 YEAR WARRANTY
After Installation, Please Leave with Customer
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Send it in by texting
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2
Introduction
When you see these Safety Symbols and Signal Words on the following pages, they
will alert you to the possibility of serious injury or death if you do not comply with the
warnings that accompany them. The hazard may come from something mechanical or
from electric shock. Read the warnings carefully.
When you see this Signal Word on the following pages, it will alert you to the possibility
of damage to your door and/or the door operator if you do not comply with the cautionary
statements that accompany it. Read them carefully.
Mechanical
Electrical
Safety Symbol and Signal Word Review
This door operator has been designed and tested to offer safe service provided it is installed, operated, maintained and tested in strict
accordance with the instructions and warnings contained in this manual.
Table of Contents
Introduction 2
Safety Symbol and Signal Word Review ...2
Planning....................................................3
Preparing Your Door.................................4
Tools Needed............................................4
Carton Inventory .......................................5
Hardware ..................................................5
Additional Items You May Need................5
Assembly 6
Attach the Collar to the Door Operator......6
Attach Mounting Bracket to
Door Operator...........................................7
Installation 7
Position and Mount the Door Operator .....8
Attach the Emergency Release Rope
and Handle................................................9
Install the Automatic Door
Lock (Not Provided)..................................9
Attach the Cable Tension Monitor
(Required)...............................................10
Install the Single Button
Control Station........................................11
Install the Protector System....................12
Install the Light Curtain (Not Provided)...15
Connect Power........................................16
Install the Battery
Backup (Not Provided)............................18
Adjustments 19
Program the Travel .................................19
Test the Safety Reversal System.............20
Test the Protector System.......................20
Test Cable Tension Monitor ....................21
Test Automatic door lock........................21
To Open the Door Manually ....................21
Operation 22
Using Your Door Operator ......................23
Programming 24
Remote Control (Not Provided)...............24
To Erase the Memory..............................24
Maintenance 25
Care of Your Door Operator ....................25
Troubleshooting 26
Diagnostic Chart .....................................26
Additional Troubleshooting.....................27
Repair Parts 29
Installation Parts.....................................29
Door Operator Parts................................29
Accessories 30
Contact Information 30
WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause
cancer or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov

3
Planning
Survey your area to see if any of the conditions below apply to your installation.
Depending on your requirements, additional materials may be required.
THIS DOOR OPERATOR IS COMPATIBLE WITH:
• Doors that use a torsion bar and springs. The torsion bar must be 1" (2.5 cm)
diameter. NOT compatible with reverse wound drums.
• 4-6" (10-15 cm) drums, not to be used on tapered drums over 6" (15 cm).
• High lift (up to 54" (137.2 cm) high) and standard lift sectional doors up to 14 ft.
(4.3 m) high.
• Doors up to 18 ft. (5.5 m) wide.
• Doors up to 180 sq. ft. (16.7 sq. m).
Review or inspect proposed installation area. The door operator can be installed on the left
or right side of door. Select the side that meets the requirements listed below.
a. Must have minimum of 2.5" (6.4 cm)
between the wall and the center of the
torsion bar.
b. Must have minimum of 3" (7.6 cm)
between the ceiling and the center of
torsion bar.
c. Must have minimum of 8.5" (21.6cm)
between the side wall (or obstruction)
and the end of torsion bar.
d. The torsion bar must extend at least
1.5" (3.81 cm) past the bearing.
This may vary depending on your
installation requirements.
e. An electric outlet is required within
6ft. (1.83 m) of the installation area.
If outlet does not exist, contact a
qualified electrician.
f. Depending upon building
construction, extension brackets or
wood blocks may be needed to install
safety reversing sensors and cable
tension monitor.
g. Alternate floor mounting of the
safety reversing sensors will require
hardware (not provided).
h. Any gap between the floor and the
bottom of the door must not exceed
1/4" (6 mm), otherwise the safety
reversing sensors may not work
properly.
Introduction
NOTE: Inspect the torsion bar while the
door is raised and lowered. It is important
that there is no noticeable movement up
and down or left and right. If the movement
is not corrected, the life of the door
operator will be greatly reduced.
a
b
h
c
d
e
f
g
Torsion
bar
2.5"
(6.4 cm)
3"
(7.6 cm)
Wall or
obstruction
Torsion bar
8.5"
(21.6cm)
Safety
reversing
sensor
MyQ®LED
Remote Light
(Not provided)
Automatic
door lock
(Not
provided)
Door spring

4
Introduction
Preparing Your Door
BEFORE YOU BEGIN:
• Disable locks.
• Remove any ropes connected to the
door.
Complete the following test to make sure
the door is balanced and is not sticking or
binding:
1. Lift the door halfway up. Release
the door. If balanced, it should stay
in place, supported entirely by its
springs.
2. Raise and lower the door to check for
binding or sticking.
3. Doors heavier than 650 lbs. should
NOT open or fall rapidly.
If your door binds, sticks, or is out of
balance, call a trained door systems
technician.
4. Verify equal cable tension on each
side of door. Cable tension should
remain equal during the entire travel
of the door.
To prevent damage to door and operator:
• ALWAYS disable locks BEFORE installing and operating the operator.
• ONLY operate door operator at 120V, 60Hz to avoid malfunction and damage.
• DO NOT exceed 10 complete cycles of door operation per hour.
To prevent possible SERIOUS INJURY or DEATH:
• ALWAYS call a trained door systems technician if door binds, sticks, or is out of
balance. An unbalanced door may NOT reverse when required.
• NEVER try to loosen, move or adjust door, door springs, cables, pulleys, brackets
or their hardware, ALL of which are under EXTREME tension.
• Disable ALL locks and remove ALL ropes connected to door BEFORE installing
and operating door operator to avoid entanglement.
Tools Needed
During assembly, installation and adjustment of the door operator, instructions will call for hand tools as illustrated below.
Sectional Door
SPECIFICATIONS
Volts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120 Vac - 60 Hz, ONLY
Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 AMP
Light Duty Commercial Use Rated Load . . . . . . . . . . . . . . . . . . . . . . . 385 in. lb./sec.
LED Light (Not Provided) Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.2 AMPS
Pliers
Wire Cutters
Claw Hammer
Screwdriver
Adjustable End Wrench
1/4", 5/16", and 3/8" Sockets
and Wrench with 6" Extension
Drill Tape Measure
Stepladder
Pencil
5/32", 3/16", 5/16"
and 3/4" Drill Bits
Level

5
Carton Inventory
Introduction
2 Conductor Bell
Wire White and
White/Red
Door Operator
Cable Tension Monitor
with 2-Conductor
Green/White Bell Wires
Mounting
Bracket
Collar with
Set Screws
Safety Reversing
Sensor Bracket (2)
The Protector System (2) Safety
Reversing Sensors (1 Sending
Sensor and 1 Receiving Sensor)
with 2-Conductor White and
White/Black Bell Wire attached
Safety Labels
and Literature
Hardware
Your door operator is packaged in one carton which contains the motor unit and the parts illustrated below. If anything is missing,
carefully check the packing material.
Single Button
Control Station
Screw #10-32 (2)
Screw 14-10x2" (4)
Handle
Rope
Screw 1/4"-20x1/2" (2)
Carriage Bolt 1/4"-20x1/2" (2)
Wing Nut 1/4"-20 (2)
Additional Items You May Need
Extension brackets (Model 041A5281-1)
or wood blocks: Depending upon building
construction, extension brackets or wood
blocks may be needed to install the safety
reversing sensor.
Fastening hardware: Alternate floor
mounting of the safety reversing sensor
will require hardware not provided.
90˚ connector for cable conduit or flex
cable adapter: Required for permanent
wiring.
Battery Backup (Model 485LM): Provides
backup power to the door operator.
Automatic door lock (Model 841LM): The
automatic door lock is used to prevent the
door from being manually opened once the
door is fully closed.

6
Set
Screws
Collar
Motor
Shaft
To avoid installation difficulties, do not run the door operator until instructed to
doso.
The door operator can be installed on either side of the door (see Planning section
page3). The illustrations shown are for installation on the left side.
1. Loosen the set screws.
2. Attach collar to the door operator motor shaft. The side of the collar with the larger
hole should be placed on the motor shaft. Ensure that the collar is seated all the way
on motor shaft until stop is reached.
3. Position the collar so the screws are facing out and are accessible when attached to
the torsion bar.
4. Securely tighten the 2 square head set screws closest to the motor shaft by turning
the screws 1/4 - 1/2 turn after making contact with the motor shaft.
Attach the Collar to the Door Operator
Assembly
1
To prevent possible SERIOUS INJURY
or DEATH, the collar MUST be properly
tightened. The door may NOT reverse
correctly or limits may be lost due to
collar slip.

7
Installation
IMPORTANT INSTALLATION INSTRUCTIONS
To reduce the risk of SEVERE INJURY or
DEATH:
1. READ AND FOLLOW ALL INSTALLATION WARNINGS
AND INSTRUCTIONS.
2. Install door operator ONLY on properly balanced and
lubricated door. An improperly balanced door may
NOT reverse when required and could result in SEVERE
INJURY or DEATH.
3. ALL repairs to cables, spring assemblies and other
hardware MUST be made by a trained door systems
technician BEFORE installing operator.
4. Disable ALL locks and remove ALL ropes connected to
door BEFORE installing operator to avoid entanglement.
5. Where possible, install the door operator 7 feet (2.13m)
or more above the floor.
6. Mount the emergency release within reach, but at least
6feet (1.83 m) above the floor and avoiding contact
with vehicles to avoid accidental release.
7. NEVER connect door operator to power source until
instructed to do so.
8. NEVER wear watches, rings or loose clothing while
installing or servicing operator. They could be caught in
door or operator mechanisms.
9. Install wall-mounted door control:
• within sight of the door.
• out of reach of small children at a minimum height
of 5 feet (1.5 m) above floors, landings, steps or
any other adjacent walking surface.
• away from ALL moving parts of the door.
10. Install the Emergency Release Marking. Attach the
marking on or next to the emergency release. Install the
Entrapment Warning Placard next to the door control in
a prominent location.
11. Place emergency release/safety reverse test label in plain
view on inside of door.
12. Upon completion of installation, test safety reversal
system. Door MUST reverse on contact with a 1-1/2"
(3.8 cm) high object (or a 2x4 laid flat) on the floor.
Attach Mounting Bracket to Door Operator
2
1. Loosely attach slotted side of mounting bracket to the same side of the door
operator as the collar, using screws provided.
NOTE: Do not tighten screws until instructed.
Socket Wrench
Assembly
HARDWARE
Screw
#10-32 (2)

8
Set screws
(Torsion bar)
Bearing
Plate
Collar
Torsion Bar
.25" (.6 cm) min.
space between
bearing and
collar
Mounting Bracket
Screws 14-10 x 2"
Installation
HARDWARE
Position and Mount the Door Operator
1
NOTE: For additional mounting options refer to the accessories page.
1. Close the door completely.
2. Slide the door operator onto the end of the torsion bar. If the torsion bar is too long
or damaged, you may need to cut the torsion bar.
Ensure the collar does NOT touch the bearing.
3. Use a level to position and vertically align the door operator. Verify the mounting
bracket is located on a solid surface such as wood, concrete or door/flag bracket. If
installing on drywall, the mounting bracket MUST be attached to a stud.
4. When the door operator is properly aligned, mark the mounting bracket holes. If
necessary, tighten collar screws on the torsion bar to hold door operator in place
while marking holes.
NOTE: The door operator does not have to be flush to wall.
5. Remove the door operator from torsion bar. Drill 3/16" pilot holes at the marked
locations. Drill through metal door rail plates if necessary.
6. Slide the door operator back onto the torsion bar until pilot holes align with bracket.
7. Tighten the 2 square head set screws on the torsion bar. For a hollow torsion bar,
tighten screws 3/4 - 1 full turn after making contact with the bar. For a solid shaft
torsion bar, tighten screws 1/4 - no more than 1/2 turn after making contact with
the shaft. If installing on a keyed torsion bar, DO NOT tighten the screws into the
keyway.
8. Secure the mounting bracket to the wall and to the door operator. Use the 14-10x2"
screws to secure the mounting bracket to the wall.
To prevent possible SERIOUS INJURY
or DEATH:
• Concrete anchors MUST be used if
mounting bracket into masonry.
• NEVER try to loosen, move or
adjust door, springs, cables,
pulleys, brackets or their hardware,
ALL of which are under EXTREME
tension.
• ALWAYS call a trained door
systems technician if door binds,
sticks or is out of balance. An
unbalanced door might NOT
reverse when required.
• Operator MUST be mounted at a
right angle to the torsion bar to
avoid premature wear on the collar.
Screw
14-10 x 2" (2)

9
10 feet (3.05 m)
max.
3" (7.6 cm)
Door Track
Roller
Lock
Template
Attach the Emergency Release Rope and Handle
Install the Automatic Door Lock (Not Provided)
2
3
1. Insert one end of the emergency release rope through the handle. Make sure that
“NOTICE” is right side up. Secure with an overhand knot at least 1" (2.5 cm) from
the end of the rope to prevent slipping.
2. Insert the other end of the emergency release rope through the hole in the trolley
release arm. Mount the emergency release within reach, but at least 6 feet (1.83 m)
above floor, avoiding contact with vehicles to prevent accidental release and secure
with an overhand knot.
NOTE: If it is necessary to cut the rope, heat seal the cut end with a match or lighter to
prevent unraveling.
NOTE: Older model 24 V door locks are
incompatible.
1. The lock must be mounted within
10 ft. (3.05m) of door operator If
possible, mount on same side as door
operator. The third roller from the
bottom is ideal for most installations.
2. Ensure rail surface is clean and attach
the lock template to the track so that
the bolt hole is approximately 3"
(7.6cm) from the center of a door
roller.
3. Drill holes as marked on the template.
4. Fasten automatic door lock to
the outside of the door track with
hardware provided.
5. Run bell wire up wall to door
operator. Use insulated staples to
secure wire in several places. Insert
wire through the bottom of the door
operator.
6. Plug the connector into either plug in
the door operator.
A secondary door lock can be installed on
the opposite side of the door following the
instructions above.
Installation
The automatic door lock (model 841LM) is used to prevent the door from being
manually opened once the door is fully closed, see Accessories page 30.
Door Operator
Emergency
Release Cable
Overhand
Knot
Overhand
Knot
Emergency
Release Handle
To prevent possible SERIOUS INJURY
or DEATH from a falling door:
• If possible, use emergency release
handle to disengage door ONLY when
door is CLOSED. Weak or broken
springs or unbalanced door could
result in an open door falling rapidly
and/or unexpectedly.
• NEVER use emergency release handle
unless doorway is clear of persons
and obstructions.
HARDWARE
Screw
1/4"-20x1/2" (2)
Rope
Handle
HARDWARE
1
2
3
4
5
6

10
HARDWARE
Attach the Cable Tension Monitor (Required)
4
NOTE: The cable tension monitor is shipped for left side installation. It is recommended
that the cable tension monitor be installed on the same side of the door as the door
operator. For right side installation, remove the snap-ring holding the roller in place and
reassemble it on the opposite side of the cable tension monitor.
1. Make sure the door cable is approximately 3/4" (19 mm) from the mounting surface.
Door adjustments or shimming may be required to achieve proper depth for the door
cable.
2. Position the cable tension monitor so the roller is 2"-6" from the drum and the roller
extends 1/8"-1/4" past the cable. Make sure cable tension monitor is located over a
wood support member and the roller is free from any obstructions.
NOTE: There must be no obstructions in the installation area that prevent the cable
tension monitor from closing completely when slack is detected.
3. Mark and drill 3/16" pilot holes for screws (pilot holes are not required for anchors).
4. Attach the cable tension monitor to the wall using the hardware provided. Make sure
that the roller is on top of the cable.
5. Run bell wire to door operator. Use insulated staples to secure wire.
6. Connect bell wire to the green quick-connect terminals on the door operator (polarity
is not important).
NOTE: Cable must have tension through entire door travel. Make sure there is no
slack in cable on opposite side of door during normal operation. If slack occurs
during door travel, adjust cables as required.
A second cable tension monitor may be installed for additional security. When two cable
tension monitors are installed, the door will not move in the down direction or will reverse
if one of the monitors detects slack or is disconnected.
If one of the cable tension monitors is removed, unplug both monitors from the operator.
Then plug in the monitor you wish to use and unplug and plug in the operator three times
to relearn the monitor to the operator.
Drum
Cable
To insert or
release wire,
push in tab with
screwdriver tip
(To cable tension monitor)
(To door operator)
WHT/
GRN
Wall
2"-6"
(5-15 cm)
Approx. 3/4" (19 mm)
Cable
Tension
Monitor
Cable Tension
Monitor Roller
1/8"-1/4"
(3-6 mm)
Installation
The cable tension monitor MUST be
connected and properly installed before
the door operator will move in the down
direction.
The cable tension monitor detects ANY
slack that may occur in the cables and
will reverse the door, eliminating service
calls.
SIDE VIEW
Screws
#8-32x1" (2)
Drum
Cable Tension
Monitor Roller
Screw
14-10x2" (2)