Chamberlain 8500C User manual

• Please read this manual and the enclosed safety materials carefully!
• Fasten the manual near the garage door after installation.
• The door WILL NOT CLOSE unless the Protector System®and cable tension monitor
are connected and properly aligned.
• Periodic checks of the garage door opener are required to ensure safe operation.
• The model number label is located behind the hinged door of your opener.
• DO NOT exceed 10 complete cycles of door operation per hour.
• This garage door opener is ONLY compatible with myQ®and Security+ 2.0®
accessories.
This product is intended for installation only by trained garage door technicians. This
product may require adjustments to door springs and or track configurations. This
product is not intended for use on low headroom tracks or garage doors utilizing
extension springs.
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Wall Mount Garage Door Opener
Model 8500C
For Residential and Light Duty Commercial Use
Install on Sectional Doors with Torsion Assemblies Only
LiftMaster
300 Windsor Drive
Oak Brook, IL 60523

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 garage door and/or the garage door opener if you do not comply with
the cautionary statements that accompany it. Read them carefully.
Mechanical
Electrical
Safety Symbol and Signal Word Review
This garage door opener 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 Garage Door.....................4
Tools Needed............................................4
Carton Inventory .......................................5
Hardware ..................................................5
ASSEMBLY 6
Attach the Collar to the
Garage Door Opener .................................6
Attach Mounting Bracket to
Garage Door Opener .................................7
INSTALLATION 7
Position and Mount the
Garage Door Opener .................................8
Attach the Emergency Release Rope
and Handle................................................9
Install Power Door Lock............................9
Attach the Cable Tension Monitor
(Required)...............................................10
Install the Door Control
(myQ Control Panel) ...............................11
Install Remote Light................................12
Install the Protector System®.................13
Connect Power........................................16
Install the Battery Backup (optional).......18
ADJUSTMENT 19
Program the Travel Limits.......................19
Set the Force...........................................20
Test the Safety Reversal System.............21
Test the Protector System®....................21
Test Cable Tension Monitor ....................22
Test Power Door Lock.............................22
To Open the Door Manually ....................22
OPERATION 23
Using Your Garage Door Opener.............23
Using the Door Control
(myQ Control Panel) ...............................24
Using the Remote Control.......................25
PROGRAMMING 26
To Add a Remote Control,
Keyless Entry, or myQ Enabled Accessories
using the
Door Control (myQ Control Panel)..........26
LiftMaster®Internet Gateway
(Not Provided) ........................................27
To Erase All Codes From the
Door Control (myQ Control Panel)
Memory ..................................................27
Reprogramming Light or
Additional Light.......................................27
Additional Programming for the Keyless
Entry (Not Provided)...............................28
HomeLink®..............................................28
MAINTENANCE ......................... 29
Care of Your Garage Door Opener...........29
TROUBLESHOOTING 30
Diagnostic Chart .....................................30
Troubleshooting......................................31
Troubleshooting (Continued)..................32
REPAIR PARTS 33
Installation Parts.....................................33
Garage Door Opener Assembly Parts......34
CONTACT INFORMATION 34
ACCESSORIES 35
WARRANTY 36
Automatic Garage Door Opener
Safety & Maintenance Guide 37
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 garage area to see if any of the conditions below apply to your installation.
Depending on your requirements, additional materials may be required.
THIS GARAGE DOOR OPENER IS COMPATIBLE WITH:
• Doors that use a torsion bar and springs. The torsion bar must be 1 inch (2.5 cm)
diameter.
• 4-6 inch (10-15 cm) drums, not to be used on tapered drums over 6 inches (15 cm).
• 3 to 3.9 inch (7.6cm to 9.9cm) drums may be used on doors up to 430lbs.
(195.4Kgs)
• High lift (up to 54 inches (137.2 cm) high) and standard lift sectional doors up to
14 feet (4.3 m) high.
• Doors up to 18 feet (5.5 m) wide.
• Doors up to 180 sq. ft. (16.7 sq. m).
Review or inspect proposed installation
area. The garage door opener 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 2-1/2 inches
(6.4 cm) between the garage wall and
the center of the torsion bar.
b. Must have minimum of 3 inches
(7.6 cm) between the ceiling and the
center of torsion bar.
c. Must have minimum of 8.5 inches
(21.6 cm) between the side garage
wall (or obstruction) and the end of
torsion bar.
d. The torsion bar must extend at least
1-1/2 inches (3.81 cm) past the
bearing. This may vary depending on
your installation requirements.
e. An electric outlet is required within
6 feet (1.83 m) of the installation
area. If outlet does not exist, contact
a qualified electrician or use a low
voltage power supply (model 580LM).
f. Depending upon garage construction,
extension brackets or wood blocks
may be needed to install safety
reversing sensors.
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 inch (6 mm). Otherwise, the
safety reversal system may not work
properly.
i. A model 475LM Battery Backup is
strongly recommended if there is
no access door to the garage, as
this garage door opener cannot be
used in conjunction with an external
emergency release mechanism.
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 garage door
opener will be greatly reduced.
a
b
h
i
c
d
e
f
g
Torsion
bar
2-1/2
inches
(6.4 cm)
3 inches
(7.6 cm)
Wall or
obstruction
Torsion bar
8.5 inches
(21.6 cm)
475LM Battery Backup
Safety
reversing
sensor
Remote light

4
Introduction
Preparing Your Garage
Door
BEFORE YOU BEGIN:
• Disable locks.
• Remove any ropes connected to the
garage door.
Complete the following test to make sure
the garage 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.
If your door binds, sticks, or is out of
balance, call a trained door systems
technician.
To prevent damage to garage door and opener:
• ALWAYS disable locks BEFORE installing and operating the opener.
• ONLY operate garage door opener at 120 V, 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 garage door binds, sticks, or is
out of balance. An unbalanced garage door may NOT reverse when required.
• NEVER try to loosen, move or adjust garage 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 garage door BEFORE
installing and operating garage door opener to avoid entanglement.
Tools Needed
During assembly, installation and adjustment of the garage door opener, instructions will
call for hand tools as illustrated below.
Specifications
Volts ............................................120 Vac - 60 Hz, ONLY
Current .....................................................1.0 AMP
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
Needle Nose Pliers
5/32", 3/16", 5/16"
and 3/4" Drill Bits
Sectional Door
Torque Meter (not shown)

5
Carton Inventory
Included Accessories
Introduction
Remote Control Visor Clip
3-Button Premium Remote Control
Model 893MAX (1)
Remote Light
(Garage Door Opener Light)
with Hardware Bag
Power Door Lock with
2-Conductor White &
White/Black Bell Wire
with Connector
2 Conductor Bell
Wire White &
White/Red
Garage Door
Opener
Cable Tension Monitor
with 2-Conductor
Green/White Bell Wires
Mounting
Bracket
Collar with
Set Screws
Safety Sensor Bracket (2)
The Protector System®
Safety Reversing Sensors With 2
Conductor White And White/Black
Wire Attached: Sending Sensor (1),
Receiving Sensor (1),
Safety Labels
and Literature
Hardware
Accessories included with the garage door opener will vary depending on the model purchased. If anything is missing, carefully check
the packing material.
Door Control (myQ Control Panel)
Model 889LM
Screw #10-32 (2)
Screw 14-10x2" (4)
Handle
Rope
Screw 1/4"-20x1/2" (2)
Drywall Anchor (Screw-In) (2)
Screw 8-32x1" (2)
Screw 6ABx1-1/4" (2)
Drywall Anchor (2)
Screw 6-32x1" (2)
Carriage Bolt 1/4"-20x1/2" (2)
Wing Nut 1/4"-20 (2)
REMOTE LIGHT HARDWARE:
Drywall Anchor (Screw-In) (2)
Screw #6x1" (2)
Screw #4-20x7/16" (2)
Hinge Clip (1)
Latch Clip (1)
NOT SHOWN: Lock Template

6
Collar
Motor Shaft
Set Screws
To avoid installation difficulties, do not run the garage door garage door opener until
instructed to do so.
The garage door opener 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 garage door opener 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 Garage Door Opener
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 garage door opener 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 garage door opener.
4. Disable ALL locks and remove ALL ropes connected to
door BEFORE installing garage door opener to avoid
entanglement.
5. Where possible, install the door operator 7 feet 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 garage door opener to power source
until instructed to do so.
8. NEVER wear watches, rings or loose clothing while
installing or servicing the garage door opener. 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 Garage Door Opener
2
1. Loosely attach slotted side of mounting bracket to the same side of the garage door
opener as the collar, using screws provided.
NOTE: Do not tighten screws until instructed.
Socket Wrench
Assembly
HARDWARE
Screw
#10-32 (2)

8
Bearing
Plate
Collar
Torsion Bar
.25" min. space
between
bearing and
collar
Mounting Bracket
Screws 14-10x2"
Set screws
(Torsion bar)
Installation
HARDWARE
Position and Mount the Garage Door Opener
1
NOTE: For additional mounting options refer to the accessories page.
1. Close the garage door completely.
2. Slide the garage door opener 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 garage door opener. 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 garage door opener is properly aligned, mark the mounting bracket holes.
If necessary, tighten collar screws on the torsion bar to hold garage door opener in
place while marking holes.
NOTE: The garage door opener does not have to be flush to wall.
5. Remove the garage door opener from torsion bar. Drill 3/16 inch pilot holes at the
marked locations. Drill through metal door rail plates if necessary.
6. Slide the garage door opener 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 garage door opener. Use the
14-10 x 2" 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 garage door, springs,
cables, pulleys, brackets or their
hardware, ALL of which are under
EXTREME tension.
• ALWAYS call a trained door
systems technician if garage door
binds, sticks or is out of balance.
An unbalanced garage door might
NOT reverse when required.
• Garage door opener MUST be
mounted at a right angle to the
torsion bar to avoid premature
wear on the collar.
Screw
14-10x2" (2)

9
Attach the Emergency Release Rope and Handle
Install Power Door Lock
2
3
1. Thread one end of the rope through the hole in the top of the red handle so
“NOTICE” reads right side up. Secure with an overhand knot at least 1 inch (2.5 cm)
from the end of the rope to prevent slipping.
2. Thread the other end of the rope through the loop in the emergency release cable.
Adjust rope length so the handle is no higher than 6 feet (1.83 m) above the floor.
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.
1. The power door lock must be
mounted within 10 feet (3.05m)
of garage door opener with
approximately a 3 inch (7.6 cm)
distance between the center of a door
roller and the hole for the power door
lock bolt. If possible, mount on same
side as garage door opener. The
second roller from the bottom is ideal
for most installations.
2. Ensure rail surface is clean and attach
lock template to track.
3. Drill holes as marked on the template.
4. Fasten power door lock to the
outside of the garage door track with
hardware provided.
5. Run bell wire up wall to garage door
opener. Use insulated staples to
secure wire in several places. Insert
wire through the bottom of the garage
door opener.
6. Plug the connector into the garage
door opener.
Installation
The power door lock is used to prevent the garage door from being manually opened
once the door is fully closed.
Garage Door
Opener
Emergency
Release Cable
Overhand
Knot
Overhand
Knot
Emergency
Release Handle
To prevent possible SERIOUS INJURY
or DEATH from a falling garage door:
• If possible, use emergency release
handle to disengage door ONLY when
garage 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 garage doorway is clear of
persons and obstructions.
Roller
Approx. 3" (7.6 cm)
10 feet (3.05 m) max.
Garage Door
Track
Lock
Template
HARDWARE
Screw
1/4"-20x1/2" (2)
Rope
Handle
HARDWARE
Connector
Door Lock
Bell
Wire

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 garage
door opener. 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 as close to the drum as possible. 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 inch pilot holes for screws (pilot holes are not required for
anchors).
NOTE: If the cable tension monitor cannot be mounted into wood with the screws
provided, it can be mounted into 1/2 inch (1 cm) or greater drywall using the drywall
anchors (2) and the #8 screws (2) provided in the hardware bag.
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 garage door opener. Use insulated staples to secure wire.
6. Connect bell wire to the green quick-connect terminals on the garage door opener
(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 garage door during normal operation. If slack
occurs during door travel, adjust cables as required.
Drum
Cable
To insert or
release wire,
push in tab with
screwdriver tip
(to cable tension monitor)
(to garage door opener)
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 garage door opener 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
Lag Screw 5/16"-9x2"
Screw 1/4-20 (2) Wall Anchor (2)
Staples
#8 Hex Head Screw (2)
Screw #6 (2) Wall Anchor (2)
Staples
Lag Screw 5/16"-9x2"
Screw 1/4-20 (2) Wall Anchor (2)
Staples
#8 Hex Head Screw (2)
Screw #6 (2) Wall Anchor (2)
Staples
Screws
#8-32x1" (2)
Drywall Anchor (screw-in) (2)
Drum
Cable Tension
Monitor Roller
Screw
14-10x2" (2)

11
Install door control within sight of garage 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, and away from ALL moving parts of door.
For gang box installations it is not necessary to drill holes or install the drywall anchors.
Use the existing holes in the gang box.
NOTE: Due to power consumption this door control (Model 889LM) cannot be used in
conjunction with another wired door control connected to your garage door opener. If
an additional door control is needed, the wireless door control model 885LM can be
programmed to the door control (Model 889LM).
1. Strip 7/16" (11 mm) of insulation from one end of the wire and separate the wires.
2. Connect wires to the door control. Make sure the polarity is correct.
• Red wire to the RED terminal.
• White wire to the WHT terminal.
3. Mark the location of the bottom mounting hole and drill a 5/32" (4 mm) hole.
4. Install the bottom screw, allowing 1/8" (3 mm) to protrude from the wall.
5. Position the bottom hole of the door control over the screw and slide down into
place.
6. Lift the push bar up and mark the top hole.
7. Remove the door control from the wall and drill a 5/32" (4 mm) hole for the top
screw.
8. Position the bottom hole of the door control over the screw and slide down into
place. Attach the top screw.
9. Run the white and red/white wire from the door control to the garage door opener.
Attach the wire to the wall and ceiling with the staples (not applicable for gang box
or pre-wired installations). Do not pierce the wire with the staple as this may cause
a short or an open circuit.
10. Strip 7/16" (11 mm) of insulation from the end of the wire near the garage door
opener. Connect bell wire to the quick-connect terminals on the garage door
opener: white to white and white/red to red.
11. Fasten the warning placard to the wall next to the door control.
NOTE: DO NOT connect the power and operate the garage door opener at this time. The
door will travel to the fully open position but will not return to the close position until
the safety reversing sensors are connected and properly aligned. See page 13.
Install the Door Control (myQ Control Panel)
5
Installation
To prevent possible SERIOUS INJURY or
DEATH from electrocution:
• Be sure power is NOT connected
BEFORE installing door control.
• Connect ONLY to 7-28 VOLT low
voltage wires.
To prevent possible SERIOUS INJURY or
DEATH from a closing garage door:
• Install door control within sight of
garage 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,
and away from ALL moving parts of
door.
• NEVER permit children to operate or
play with door control push buttons or
remote control transmitters.
• Activate door ONLY when it can be
seen clearly, is properly adjusted,
and there are no obstructions to door
travel.
• ALWAYS keep garage door in sight
until completely closed. NEVER permit
anyone to cross path of closing garage
door.
HARDWARE
Red White
WHT/RED
WHT
To insert or
release
wire, push
in tab with
screwdriver
tip
7/16" (11 mm)
Screw 6ABx1-1/4" (Standard installation) (2)
Screw 6-32x1"
(pre-wired) (2)
Drywall
Anchors (2)
(to garage door opener)
(to door control)

12
The remote light (garage door opener light)
is designed to plug directly into a standard
120V outlet. Select an appropriate location
on the ceiling to mount the light within 6
feet (1.83 m) of an electrical outlet so that
the cord and light are away from moving
parts.
1. Install the hinge and latch clips. Clips
slide in between the metal plate and
the plastic housing on each side of
the light base.
2. Install screws into the ceiling through
the metal plate, leaving 1/8 inch (3
mm) of the thread exposed.
NOTE: If installing light on drywall
and a ceiling joist cannot be located,
use drywall anchors provided. No
pilot hole is required for drywall
anchors.
3. Determine the length of power cord
needed to reach the nearest outlet.
Wind any excess cord around cord
retainer on the top side of the light
base.
4. Install the light base by pushing onto
the screws and turning the base
clockwise to lock the light in place.
5. Install two Type A19 incandescent or
compact fluorescent bulbs (100 watt
maximum per bulb, 200 watts total).
NOTE: Do not use LED bulbs as they
may reduce the range or performance
of your remote control(s).
6. Install the light lens by hooking one
end of the lens over the hinge and
pressing up on the other end to latch
into place.
7. Plug in the light to outlet.
NOTE: Light will not operate until the
garage door opener is activated.
Multiple operators in the same garage
may cause interference between
lights. Program all lights to one
operator to avoid interference.
Install Remote Light
6
Installation
To prevent possible OVERHEATING of
the endpanel or light socket:
• DO NOT use short neck or specialty
light bulbs.
• DO NOT use halogen bulbs. Use
ONLY incandescent.
• DO NOT use bulbs larger than
100W.
• ONLY use A19 size bulbs.
To provide an adequate visual alert, the
garage door opener light bulb MUST be
a minimum of 40 Watt (or equivalent).
IMPORTANT INSTALLATION INSTRUCTIONS
To reduce the risk of SEVERE INJURY or DEATH:
1. This portable luminaire has a polarized plug (one blade
is wider than the other) as a feature to reduce the risk of
electric shock.
2. This plug will fit in a polarized outlet ONLY one way.
3. If the plug does not fit fully in the outlet, reverse the
plug.
4. If it still does not fit, contact a qualified electrician.
5. NEVER use with an extension cord unless plug can be
fully inserted.
6. DO NOT alter the plug.
7. Light is intended for ceiling mount and indoor
applications ONLY.
Latch Clip
Light Clip
Screw
Screws
Light Lens
Wall Anchor
Cord
Retainer
100 Watt
(max.)
Metal
Plate
Plastic
Housing
Hinge Clip
Drywall Anchor (screw-in) (2)
HARDWARE
Screw #4-20x7/16" (2)
Screw #6x1" (2)
Light Base
Antenna needs to be
fully exposed to prevent
intermittent light
behavior.

13
The safety reversing sensor must be connected and aligned correctly before the
garage door will move in the down direction. This is a required safety device and
cannot be disabled.
IMPORTANT INFORMATION ABOUT THE SAFETY REVERSING SENSOR
When properly connected and aligned, the safety reversing sensor will detect an obstacle
in the path of its electronic beam. The sending sensor (with an amber indicator light)
transmits an invisible light beam to the receiving sensor (with a green indicator light).
If an obstruction breaks the light beam while the door is closing, the door will stop and
reverse to fully open position.
The sensors must be installed inside the garage so that the sending and receiving sensors
face each other across the door, no more than 6 inches (15 cm) above the floor. Either
can be installed on the left or right of the door as long as the sun never shines directly into
the receiving sensor lens.
The mounting brackets are designed to clip onto the track of sectional garage doors
without additional hardware.
If it is necessary to mount the sensors on the wall, the brackets must be securely fastened
to a solid surface such as the wall framing. Extension brackets (see accessories) are
available if needed. If installing in masonry construction, add a piece of wood at each
location to avoid drilling extra holes in masonry if repositioning is necessary.
The invisible light beam path must be unobstructed. No part of the garage door (door
tracks, springs, hinges, rollers or other hardware) may interrupt the beam while the door
is closing.
Invisible Light Beam
Protection Area
Safety Reversing Sensor
6" (15 cm) max. above floor Safety Reversing Sensor
6" (15 cm) max. above floor
Be sure power is NOT connected to the
garage door opener BEFORE installing
the safety reversing sensor.
To prevent SERIOUS INJURY or
DEATH from a closing garage door:
• Correctly connect and align the
safety reversing sensor. This
required safety device MUST NOT
be disabled.
• Install the safety reversing sensor
so beam is NO HIGHER than 6" (15
cm) above garage floor.
Installation
Safety Reversing
Sensor
6" (15 cm) max.
above floor
Safety Reversing
Sensor
6" (15 cm) max.
above floor
Invisible Light
Beam Protection
Area
Install the Protector System®
7
Facing the door from inside the garage.

14
OPTION C: Floor Installation
1. Use wood blocks or extension
brackets (see Accessories) to elevate
sensor brackets so the lenses will be
no higher than 6" (15 cm) above the
floor.
2. Carefully measure and place right and
left assemblies at the same distance
out from the wall. Be sure all door
hardware obstructions are cleared.
3. Fasten to the floor with concrete
anchors as shown.
Inside
Garage
Wall
Inside
Garage
Wall
Inside
Garage
Wall
Inside
Garage
Wall
Installation
Fasten Wood Block to Wall with
Lag Screws (not provided)
Attach with Concrete Anchors
(not provided)
OPTION A: Track Installation
1. Slip the curved arms over the
rounded edge of each door track,
with the curved arms facing the door.
Snap into place against the side of the
track. It should lie flush, with the lip
hugging the back edge of the track, as
shown.
If your door track will not support the
bracket securely, wall installation is
recommended.
OPTION B: Wall Installation
1. Place the bracket against the wall
with curved arms facing the door. Be
sure there is enough clearance for the
sensor beam to be unobstructed.
2. If additional depth is needed, an
extension bracket (see Accessories)
or wood blocks can be used.
3. Use bracket mounting holes as a
template to locate and drill (2) 3/16"
diameter pilot holes on the wall at
each side of the door, no higher than
6" (15 cm) above the floor.
4. Attach brackets to wall with
lagscrews (notprovided).
If using extension brackets or wood blocks,
adjust right and left assemblies to the same
distance out from the mounting surface.
Make sure all door hardware obstructions
are cleared.
Inside
Garage
Wall
Inside
Garage
Wall
INSTALLING THE BRACKETS
Be sure power to the opener is disconnected. Install and align the brackets so the safety reversing sensors will face each other across
the garage door, with the beam no higher than 6" (15 cm) above the floor. Choose one of the following installations.
Door Track
Safety Reversing Sensor
Bracket
Safety Reversing Sensor Bracket
Lag Screws (not provided)
Safety Reversing Sensor Bracket
Inside
Garage
Wall
Inside
Garage
Wall
(Provided with Extension Bracket)
Extension Bracket (See Accessories)
Safety Reversing Sensor
Bracket
(Provided with
Extension Bracket)

15
Installation
WIRE THE SAFETY REVERSING SENSORS
1. Run the wire from both sensors to the garage door opener. Attach the wire to the
wall and ceiling with the staples.
2. Strip 7/16 inch (11 mm) of insulation from each set of wires. Separate the wires.
Twist the white wires together. Twist the white/black wires together.
3. Insert the white wires into the white terminal on the garage door opener. Insert the
white/black wires into the grey terminal on the garage door opener. To insert or
remove the wires from the terminal, push in the tab with a screwdriver tip.
WHT/
BLK
Bell wire
WHT
MOUNTING THE SAFETY REVERSING SENSORS
1. Slide a hex screw into the slot on each sensor.
2. Use wing nuts to fasten safety reversing sensors to brackets, with lenses
pointing toward each other across the door. Be sure the lens is not
obstructed by a bracket extension.
3. Finger tighten the wing nuts.
6" (15 cm) max.
Wing nut
HARDWARE
7/16
(11 mm)
Hex Screw 10-24 (2)
Wing Nut (2)

16
Ground
Tab Green Ground
Screw Ground Wire
Black Wire
From Power
Cord
White Wire
From Power
Cord
Flexible
Conduit
90˚
Connector
(Not
Provided)
Green Wire White Wire
Black Wire
BACK VIEW
Connect Power
8
Installation
OPTION B: PERMANENT WIRING
CONNECTION
If permanent wiring is required by
your local code, refer to the following
procedure.
To make a permanent connection through
the 7/8 inch hole in the back of the garage
door opener (according to local code):
1. Be sure power is NOT connected to
the opener, and disconnect power to
circuit.
2. Remove the garage door opener from
the torsion bar, remove cover screws
and set the cover aside.
3. Cut the line cord 6" (15.2 cm) above
the strain relief.
4. Squeeze the strain relief and push
into motor unit, then remove the
strain relief from the line cord.
5. Install a 90° conduit (not provided)
or flex cable adapter (not provided)
to the 7/8" hole. Reinstall garage door
opener to torsion bar.
6. Run wires through conduit, cut to
proper length and strip installation.
7. Strip 1/2" (1.3 cm) of insulation from
the existing black, white and green
wires.
8. Connect the line to the black wire and
neutral to the white wire with wire
nuts (not provided). Connect ground
wire to the green ground screw.
9. Properly secure wires under plastic
ties so that they do not come into
contact with moving parts.
10. Reinstall cover.
To avoid installation difficulties, do not
run the garage door opener at this time.
To reduce the risk of electric shock, your
garage door opener has a grounding type
plug with a third grounding pin. This plug
will only fit into a grounding type outlet. If
the plug doesn’t fit into the outlet you have,
contact a qualified electrician to install the
proper outlet.
There are two options for connecting
power:
OPTION A: TYPICAL WIRING
1. Plug in the garage door opener into a
grounded outlet.
2. DO NOT run garage door opener at
this time.
To prevent possible SERIOUS INJURY or DEATH from electrocution or fire:
• Be sure power is NOT connected to the opener, and disconnect power to circuit
BEFORE removing cover to establish permanent wiring connection.
• Garage door installation and wiring MUST be in compliance with ALL local electrical
and building codes.
• NEVER use an extension cord, 2-wire adapter or change plug in ANY way to make it
fit outlet. Be sure the opener is grounded.
RIGHT WRONG
RIGHT WRONG
Ground Tab
Green
Ground Screw
Ground Wire
Black Wire
PERMANENT WIRING
CONNECTION
White Wire
Black
Wire
Ground Tab
Green
Ground Screw
Ground Wire
Black Wire
PERMANENT WIRING
CONNECTION
White Wire
Black
Wire
IMPORTANT NOTE: The model 580LM
Alternate Power Supply may be installed
if an outlet is not located near the garage
door opener. myQ light controls will
continue to work however all other myQ
devices and TTC will not work if using the
Model 580LM Alternate Power Supply.
If you would like to use these features,
contact an electrician to install an outlet
near to the garage door opener.
RIGHT WRONG
RIGHT WRONG
Ground Tab
Green
Ground Screw
Ground Wire
Black Wire
PERMANENT WIRING
CONNECTION
White Wire
Black
Wire
Ground Tab
Green
Ground Screw
Ground Wire
Black Wire
PERMANENT WIRING
CONNECTION
White Wire
Black
Wire
WRONGRIGHT

17
Sticker on back
Installation
IF THE AMBER LED ON THE SENDING SENSOR IS NOT GLOWING:
• Make sure there is power to the garage door opener.
• Make sure the sensor wire is not shorted/broken.
• Make sure the sensor has been wired correctly: white wires to white terminal and
white/black wires to grey terminal.
ENSURE THE SAFETY REVERSING SENSORS ARE ALIGNED
The door will not close if the sensors have not been installed and aligned correctly.
When the light beam is obstructed or misaligned while the door is closing, the door
will reverse. If the door is already open, it will not close. The sensors can be aligned by
loosening the wing nuts, aligning the sensors, and tightening the wing nuts.
1. Check to make sure the LEDs in both sensors are glowing steadily. The LEDs in both
sensors will glow steadily if they are aligned and wired correctly.
ENSURE THE DOOR CONTROL IS WIRED CORRECTLY
The yellow command LED and the red learn LED on the door control will blink quickly for
up to 5 minutes as the door control recharges. When the door control is operational, the
yellow command LED will glow steadily.
RED
WHITE WHITE
GREY
IF THE GREEN LED ON THE RECEIVING SENSOR IS NOT GLOWING:
• Make sure the sensor wire is not shorted/broken.
• Make sure the sensors are aligned.
Light Beam Protection Area
Receiving sensor - green LEDSending sensor - amber LED

18
When in Battery Backup mode, wireless myQ devices and Timer-To-Close will be
disabled.
If the optional Battery Backup is part of this installation, it should be installed at this time.
The Battery Backup can be mounted to either the ceiling or a wall within 3 feet (.9 m) of
the garage door opener.
1. Unplug the garage door opener.
2. Position the Battery Backup on a structural support (ceiling joist or wall stud).
3. Attach the Battery Backup to the support with the 1-1/2 inch lag screws (2) provided.
There are mounting holes on either side of the Battery Backup.
4. Connect the Battery Backup cord into the connector on the bottom of the garage
door opener.
5. Follow all instructions included with the Battery Backup to test for proper operation.
Install the Battery Backup (optional)
9
Installation
Battery Backup Cord
475LM Battery Backup
Connector

19
Adjust the position of the door by using the black and yellow buttons. Black moves the
door UP (open) and yellow moves the door DOWN (close).
NOTE: The yellow command LED and the red learn LED will blink quickly for up to
5 minutes as the control panel recharges. When the control panel is operational, the
yellow command LED will glow steadily.
SETTING THE UP POSITION:
1. Press and hold the black button until the LED starts flashing slowly, then release.
2. Push and hold the black button until the door reaches the desired UP (open)
position.
NOTE: Make sure the door opens high enough for your vehicle.
3. Push the door control or programmed remote control. This sets the UP (open) limit
and begins closing the door.
4. Immediately when the door begins to close, press and release either the black or
yellow button. This will stop the door.
SETTING THE DOWN POSITION:
5. Push and hold the yellow button until the door reaches the desired DOWN (closed)
position.
6. Once the door is closed, if there appears to be too much pressure on the door, you
may toggle the door back and forth using the black and yellow buttons to reach the
desired closed position.
7. Push the door control or programmed remote control. This sets the DOWN (close)
limit.
Proceed to Set the Force.
Travel limits regulate the points at which the door will stop when moving up or down.
Program the Travel Limits
Adjustment
12
Without a properly installed safety
reversal system, persons (particularly
small children) could be SERIOUSLY
INJURED or KILLED by a closing
garage door.
• NEVER learn forces or limits when
door is binding or sticking. Repair
door first.
• Incorrect adjustment of garage
door travel limits will interfere with
proper operation of safety reversal
system.
• After ANY adjustments are made,
the safety reversal system MUST
be tested. Door MUST reverse on
contact with 1-1/2" high (3.8 cm)
object (or 2x4 laid flat) on floor.
To prevent damage to vehicles, be
sure fully open door provides adequate
clearance.
1
LED
or
or
or
3
74 5 6

20
The force setting measures the amount of force required to open and close the door.
1. Push the yellow button twice to enter into the Force Adjustment Mode. The LED will
flash quickly.
2. Push the door control or programmed remote control. The door will close (DOWN).
3. Push the door control or programmed remote control again. The door will open (UP).
4. Push the door control or programmed remote control a third time to close the door
(DOWN).
The LED will stop flashing when the force has been programmed.
The door must travel through a complete cycle, up and down, in order for the force to be
set properly. If the garage door opener cannot open and close the door fully, inspect the
door to ensure that it is balanced properly and is not sticking or binding.
If the door is not stopping exactly where you would like it, repeat Program the Travel
Limits.
Set the Force
Without a properly installed safety
reversal system, persons (particularly
small children) could be SERIOUSLY
INJURED or KILLED by a closing
garage door.
• NEVER learn forces or limits when
door is binding or sticking. Repair
door first.
• Too much force on garage door
will interfere with proper operation
of safety reversal system.
• After ANY adjustments are made,
the safety reversal system MUST
be tested. Door MUST reverse on
contact with 1-1/2" high (3.8 cm)
object (or 2x4 laid flat) on floor.
2
Adjustment
LED
1
234
or or or
Push yellow
button twice to
enter garage
door opener
into Force
Adjustment
Mode