Chamberlain MyQ 8550W User manual

LiftMaster
300 Windsor Drive
Oak Brook, IL 60523
SM
Wi-Fi®Garage Door Opener
Belt Drive Models 8550W•8557W•8550WL
• Please read this manual and the safety materials
carefully!
• The door WILL NOT CLOSE unless the Protector
System®is connected and properly aligned.
• Periodic checks of the garage door opener are
required to ensure safe operation.
• This garage door opener is ONLY compatible with
MyQ®and Security+ 2.0®accessories.
• DO NOT install on a one-piece door if using devices
or features providing unattended close. Unattended
devices and features are to be used ONLY with
sectional doors.
• Attach warning labels to the location indicated on
label.
FOR RESIDENTIAL USE ONLY
Register your garage door opener to receive
updates and offers from LiftMaster
Take a photo of the camera icon
including the points ( ).
Send it in by texting
the photo to 71403 (US)
or visit www.liftmaster.photo (Global)

2
Contents
Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Install the Door Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Install the Protector System®. . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Battery Backup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Repair Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

3
Preparation
MyQ®Serial Number
Write down the following information for future reference:
MyQ®Serial Number:
MyQ®Serial Number Product S/N
Product S/N:
Date of Purchase:
/ /
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.
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.
Mechanical
Electrical
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.
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
Unattended Operation
The Timer-to-Close (TTC) feature, the MyQ®Smartphone Control app, and MyQ®Garage
Door and Gate Monitor are examples of unattended close and are to be used ONLY with
sectional doors. Any device or feature that allows the door to close without being in the
line of sight of the door is considered unattended close. The Timer-to-Close (TTC)
feature, the MyQ®Smartphone Control, and any other MyQ®devices are to be used
ONLY with sectional doors.

4
Preparation
Test the Wi-Fi Signal Strength
Before You Begin
You will need:
lWi-Fi enabled smartphone, tablet or laptop
lBroadband Internet Connection
lWi-Fi signal in the garage (2.4 Ghz, 802.11b/g/n required)
lPassword for your home network (router's main account, not guest network)
Test the Wi-Fi Signal Strength
Make sure your mobile device is connected to your Wi-Fi network. Hold your mobile
device in the place where your garage door opener will be installed and check the Wi-Fi
signal strength.
Check Signal Strength. If you see:
Wi-Fi signal is strong.
The garage door opener will
connect to your Wi-Fi
network.
Wi-Fi signal is weak.
The garage door opener may connect
to your Wi-Fi network. If not, try one
of the options below to improve the
Wi-Fi signal:
No Wi-Fi signal.
The garage door opener will not be
able to connect to your Wi-Fi
network. Try one of the options
below to improve the Wi-Fi signal:
• Move your router closer to the garage
door opener to minimize interference from
walls and other objects
• Buy a Wi-Fi range extender
For compatible router specifications and help, visit WiFiHelp.LiftMaster.com.
See page 32 to connect the garage door opener to a mobile device.
Check the Door
To prevent possible SERIOUSINJURYor DEATH:
lALWAYS 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.
lNEVER try to loosen, move or adjust garage door, door springs, cables,
pulleys, brackets or their hardware, ALLof which are under EXTREME tension.
lDisable ALLlocks and remove ALLropes connected to garage door BEFORE
installation and operating garage door opener to avoid entanglement.
lDO NOT install on a one-piece door if using devices or features providing
unattended close. Unattended devices and features are to be used ONLY with
sectional doors.
To prevent damage to garage door and opener:
lALWAYS disable locks BEFORE installing and operating the opener.
lONLY operate garage door opener at 120V, 60Hz to avoid malfunction and
damage.
Before you begin:
1. Disable locks and remove any ropes connected to the garage door.
2. Lift the door halfway up. Release the door. If balanced, it should stay in place,
supported entirely by its springs.
3. 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.
4. Check the seal on the bottom of the door. 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.
5. The opener should be installed above the center of the door. If there is a torsion
spring or center bearing plate in the way of the header bracket, it may be installed
within 4feet (1.2 m) to the left or right of the door center. See page 10.
Torsion
Spring Extension
Spring

5
Preparation
Tools Needed
3/16
5/32
5/16
7/16
1/2
5/8
9/16
1/4
7/16

6
Preparation
Carton Inventory
Accessories will vary depending on the garage door opener model purchased. Depending
on your specific model, other accessories may be included with your garage door
opener. The instructions for these accessories will be attached to the accessory and are
not included in this manual. The images throughout this manual are for reference and
your product may look different.
A. Header bracket
B. Pulley and bracket
C. Door bracket
D. Curved door arm
E. Straight door arm
F. Trolley
G. Emergency release rope and handle
H. Rail
I. Garage door opener
J. Sprocket cover with hex screws
K. Belt
L. Door control (Smart Control Panel®880LMW)
M. White and red/white wire
N. The Protector System®
Safety reversing sensors with white and white/black wire attached:
Sending senor (1), receiving sensor (1), and safety sensor brackets (2)
O. Safety labels and literature
P. Rail grease
Q. 3-Button Remote Control (893MAX)
Installation
Hex Bolt 5/16"-18 x 7/8" (4) Lock Washer 5/16" (4)
Lag Screw 5/16"-9 x 1-5/8" (2) Self-Threading Screw 1/4"-14 x 5/8" (2)
Clevis Pin 5/16" x 2-3/4" (1) Ring Fastener (3)
Clevis Pin 5/16" x 1-1/4" (1) Carriage Bolt 1/4"-20 x 1/2" (2)
Clevis Pin 5/16" x 1" (1) Wing Nut 1/4"-20 (2)
Nut 5/16"-18 (4)
Door Control Hardware
Screw 6AB x 1" (2) Drywall Anchors (2)
Screw 6-32 x 1" (2) Insulated Staples
AB
C
J
N
I
OP
DE
F
H
GK
L
M
Not Provided
Not
Provided
Q

7
Assembly
1 Attach the Rail to the Garage Door Opener
To avoid possible SERIOUS INJURY to finger from moving garage door opener:
lALWAYS keep hand clear of sprocket while operating opener.
lSecurely attach sprocket cover BEFORE operating.
To avoid SERIOUS damage to garage door opener, use ONLY those bolts/fasteners
mounted in the top of the opener.
NOTE: ONLY use the bolts removed from the garage door opener. Place the garage door
opener on the packing material to prevent scratching.
1. Models 8550W and 8550WL: Remove the two bolts from the top of the garage
door opener.
Model 8557W: Remove bolt and lock nut from the top of the garage door opener.
2. Align the rail and the styrofoam over the sprocket. Cut the tape from the rail, belt,
and styrofoam.
3. Models 8550W and 8550WL: Fasten the rail with the previously removed bolts.
Model 8557W: Fasten the rail with the previously removed washered bolt and
lock nut.
4. Position the belt around the garage door opener sprocket.
5. Attach the sprocket cover over the garage door opener sprocket and attach with
hex screws.
Models 8550W and 8550WL
Model 8557W
Washered Bolt
5/16"-18x1/2"
Hex Screw
#8x3/8"
Lock Nut
Washered Bolt 5/16"-18x1/2"
(Mounted in the garage
door opener)
Models 8550W and 8550WL (2)
Model 8557W (1)
Hex Screw
#8x3/8"
(Packed with the
sprocket cover)
Lock Nut
(Mounted in the
garage door opener)
Model 8557W (1)
Washered Bolt
5/16"-18x1/2"
Hex Screw
#8x3/8"
HARDWARE

8
Assembly
2 Tighten the Belt
1. By hand, thread the spring trolley nut on the threaded shaft until it is finger tight
against the trolley. Do not use any tools.
2. Insert a flathead screwdriver tip into one of the nut ring slots and brace it firmly
against the trolley.
3. Tighten the spring trolley nut with an adjustable wrench or a 7/16" open end
wrench about a quarter turn until the spring releases and snaps the nut ring
against the trolley. This sets the spring to optimum belt tension.
Spring Trolley Nut
(To motor unit)
Nut ring
slot
Nut Ring Nut Ring
AFTER RELEASE
1-1/4"
(3.18 cm)
BEFORE
1"
(2.5 cm)
1
2
3

9
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 garage
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 opener.
4. Disable ALL locks and remove ALL ropes connected to garage door BEFORE
installing opener to avoid entanglement.
5. Install garage door opener 7 feet (2.13 m) or more above 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
opener. They could be caught in garage door or opener mechanisms.
9. Install wall-mounted garage door control:
lwithin sight of the garage door.
lout 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.
laway from ALL moving parts of the door.
10. Place entrapment warning label on wall next to garage door control.
11. Place manual release/safety reverse test label in plain view on inside of garage
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.
13. To avoid SERIOUS PERSONAL INJURY or DEATH from electrocution,
disconnect ALL electric and battery power BEFORE performing ANY service or
maintenance.
14. DO NOT install on a one-piece door if using devices or features providing
unattended close. Unattended devices and features are to be used ONLY with
sectional doors.

10
Installation
1 Determine the Header Bracket Location
To prevent possible SERIOUS INJURY or DEATH:
lHeader bracket MUST be RIGIDLY fastened to structural support on header
wall or ceiling, otherwise garage door might NOT reverse when required. DO
NOT install header bracket over drywall.
lConcrete anchors MUST be used if mounting header bracket or 2x4 into
masonry.
lNEVER try to loosen, move or adjust garage door, springs, cables, pulleys,
brackets, or their hardware, ALL of which are under EXTREME tension.
lALWAYS 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.
lDO NOT enable the Timer-to-Close functionality if operating either one-piece or
swinging garage doors. To be enabled ONLY when operating a sectional door.
Close the door and mark the inside vertical centerline of the garage door.
Extend the line onto the header wall above the door. You can fasten the header bracket
within 4 feet (1.22 m) of the left or right of the door center only if a torsion spring or
center bearing plate is in the way; or you can attach it to the ceiling when clearance is
minimal. (It may be mounted on the wall upside down if necessary, to gain approximately
1/2" (1 cm). If you need to install the header bracket on a 2x4 (on wall or ceiling), use lag
screws (not provided) to securely fasten the 2x4 to structural supports.
Open your door to the highest point of travel as shown. Draw an intersecting horizontal
line on the header wall 2" (5 cm) above the high point. This height will provide travel
clearance for the top edge of the door.
NOTE: If the total number of inches exceeds the height available in your garage, use the
maximum height possible, or refer to page 11 for ceiling installation.
Header Wall
Unfinished
Ceiling
Vertical Centerline
of Garage Door
2x4
2x4
Structural
Supports
Level
(Optional)
OPTIONAL
CEILING
MOUNT FOR
HEADER
BRACKET
Sectional door with curved track
Header Wall
Track
2" (5 cm)
Highest Point
of Travel
Door

11
Installation
2 Install the Header Bracket
You can attach the header bracket either to the wall above the garage door, or to the
ceiling. Follow the instructions which will work best for your particular requirements. Do
not install the header bracket over drywall. If installing into masonry, use concrete
anchors (not provided).
HARDWARE
Lag Screw 5/16"-9 x 1-5/8"
OPTION A WALL INSTALLATION
1. Center the bracket on the vertical centerline with the bottom edge of the bracket
on the horizontal line as shown (with the arrow pointing toward the ceiling).
2. Mark the vertical set of bracket holes (do not use the holes designated for ceiling
mount). Drill 3/16" pilot holes and fasten the bracket securely to a structural
support with lag screws.
Wall Mount
Optional
Mounting
Holes
Vertical
Centerline of
Garage Door
(Header Wall)
Header
Bracket
2x4 Structural
Support
Door Spring
(Garage Door)
Highest Point of
Garage Door
Travel
Horizontal
Line
Lag Screw
5/16"-9 x 1-5/8"
OPTION B CEILING INSTALLATION
1. Extend the vertical centerline onto the ceiling as shown.
2. Center the bracket on the vertical mark, no more than 6" (15cm) from the wall.
Make sure the arrow is pointing toward the wall. The bracket can be mounted
flush against the ceiling when clearance is minimal.
3. Mark the side holes. Drill 3/16" pilot holes and fasten bracket securely to a
structural support with the hardware provided.
(Header Wall)
Ceiling Mounting Holes
(Finished Ceiling)
Vertical
Centerline of
Garage Door
Header
Bracket
6" (15 cm)
Maximum
Door Spring
(Garage Door)
Lag Screw
5/16"-9 x 1-5/8"

12
Installation
3 Attach the Rail to the Header Bracket
1. Align the rail with the header bracket. Insert the clevis pin through the holes in
the header bracket and rail. Secure with the ring fastener.
NOTE: Use the packing material as a protective base for the garage door opener.
Ring
Fastener
Clevis Pin
5/16" X 2-3/4"
HARDWARE
Clevis Pin 5/16" x 2-3/4" Ring Fastener
4 Position the Garage Door Opener
To prevent damage to garage door, rest garage door opener rail on 2x4 placed on top
section of door.
1. Remove the packing material and lift the garage door opener onto a ladder.
2. Fully open the door and place a 2x4 (laid flat) under the rail.
A 2x4 is ideal for setting the distance between the rail and the door. If the ladder is not
tall enough you will need help at this point. If the door hits the trolley when it is raised,
pull the trolley release arm down to disconnect the inner and outer trolley. Slide the outer
trolley toward the garage door opener. The trolley can remain disconnected until
instructed.
Connected Disconnected

13
Installation
5 Hang the Garage Door Opener
To avoid possible SERIOUS INJURY from a falling garage door opener, fasten it
SECURELY to structural supports of the garage. Concrete anchors MUST be used if
installing ANY brackets into masonry.
Hanging your garage door opener will vary depending on your garage. Two
representative installations are shown. Yours may be different. Hanging brackets should
be angled (Figure 1) to provide rigid support. On finished ceilings (Figure 2), attach a
sturdy metal bracket to structural supports before installing the opener. This bracket and
fastening hardware are not provided.
1. Measure the distance from each side of the motor unit to the structural support.
2. Cut both pieces of the hanging bracket to required lengths.
3. Drill 3/16" pilot holes in the structural supports.
4. Attach one end of each bracket to a support with 5/16"-18 x 1-7/8" lag screws
(not provided).
5. Fasten the opener to the hanging brackets with 5/16"-18 x 7/8" hex bolts, lock
washers and nuts.
6. Check to make sure the rail is centered over the door (or in line with the header
bracket if the bracket is not centered above the door).
7. Remove the 2x4. Operate the door manually. If the door hits the rail, raise the
header bracket.
NOTE: DO NOT connect power to opener at this time.
FIGURE 1 FIGURE 2
(Not Provided)
Lag Screws
5/16"- 18x1-7/8"
Measure
Distance
Hex Bolt 5/16"- 18x7/8", Lock Washer 5/16", Nut 5/16"-18
FIGURE 3
Not Provided
Finished Ceiling
Unfinished Ceiling
Hex Bolt 5/16"- 18x7/8" Nut 5/16"-18Lock Washer 5/16"
HARDWARE

14
Installation
6 Install the Light Bulbs
To prevent possible OVERHEATING of the end panel or light socket:
lUse ONLY A19 incandescent (100W maximum) or compact fluorescent (26W
maximum) light bulbs.
lDO NOT use incandescent bulbs larger than 100W.
lDO NOT use compact fluorescent light bulbs larger than 26W (100W
equivalent).
lDO NOT use halogen bulbs.
lDO NOT use short neck or specialty light bulbs.
1. Pull on the top center of the light lens and rotate the light lens down.
2. Insert an A19 incandescent (100W maximum) or compact fluorescent (26W,
100Wequivalent)light bulb into the light socket.
NOTE: DO NOT use halogen, short neck, or specialty light bulbs as these may overheat
the end panel or light socket. DO NOT use LED bulbs as they may reduce the range or
performance of your remote control(s).
3. Rotate the lens up to close.
or or
7 Attach the Emergency Release Rope and Handle
To prevent possible SERIOUS INJURY or DEATH from a falling garage door:
lIf possible, use emergency release handle to disengage trolley ONLY when
garage door is CLOSED. Weak or broken springs or unbalanced door could
result in an open door falling rapidly and/or unexpectedly.
lNEVER use emergency release handle unless garage doorway is clear of
persons and obstructions.
lNEVER use handle to pull door open or closed. If rope knot becomes untied,
you could fall.
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 emergency release rope, seal the cut end with a match
or lighter to prevent unraveling. Ensure the emergency release rope and handle are above
the top of all vehicles to avoid entanglement.
Trolley
Release Arm

15
Installation
8 Install the Door Bracket
Fiberglass, aluminum or lightweight steel garage doors WILL REQUIRE reinforcement
BEFORE installation of door bracket. Contact the garage door manufacturer or
installing dealer for opener reinforcement instructions or reinforcement kit. Failure to
reinforce the top section as required according to the door manufacturer may void the
door warranty.
A horizontal and vertical reinforcement is needed
for lightweight garage doors (fiberglass,
aluminum, steel, doors with glass panel, etc.) (not
provided). A horizontal reinforcement brace
should be long enough to be secured to two or
three vertical supports. A vertical reinforcement
brace should cover the height of the top panel.
Contact the garage door manufacturer or
installing dealer for opener reinforcement
instructions or reinforcement kit.
NOTE: Many door reinforcement kits provide for direct attachment of the clevis pin and
door arm. In this case you will not need the door bracket; proceed to the next step.
SECTIONALDOORS
1. Center the door bracket on the previously marked vertical centerline used for the
header bracket installation. Note correct UP placement, as stamped inside the
bracket.
2. Position the top edge of the bracket 2"-4" (5-10 cm) below the top edge of the
door, OR directly below any structural support across the top of the door.
3. Mark, drill holes and install as follows, depending on your door’s construction:
Metal or light weight doors using a vertical angle iron brace between the door
panel support and the door bracket:
lDrill 3/16" fastening holes. Secure the door bracket using the two self threading
screws. (Figure1)
lAlternately, use two 5/16"-18x2" bolts, lock washers and nuts (not provided).
(Figure2)
Metal, insulated or light weight factory reinforced doors:
lDrill 3/16" fastening holes. Secure the door bracket using the self-threading
screws. (Figure3)
Wood Doors:
lUse top and bottom or side to side door bracket holes. Drill 5/16” holes through
the door and secure bracket with 5/16"-18 x 2" carriage bolts, lock washers and
nuts (not provided). (Figure4)
NOTE: The 1/4"-14 x 5/8" self-threading screws are not intended for use on wood doors.
FIGURE 1
FIGURE 3
Vertical Reinforcement
Vertical Centerline
of Garage Door
UP
Door Bracket Self-Threading Screw
1/4"-14 x 5/8"
Self-Threading
Screw
1/4"-14 x 5/8"
Vertical Centerline
of Garage Door
UP
FIGURE 4
Vertical
Centerline of
Garage Door
Bolt 5/16"-18 x 2"
(Not provided)
UP
Inside Edge of Door or
Reinforcement Board
FIGURE 2
Vertical Reinforcement
Bolt 5/16"-18 x 2"
(Not provided)
Lock Washer 5/16"
Nut 5/16"-18
Door Bracket
UP
Vertical
Centerline
of Garage Door
Self-Threading Screw
1/4"-14 x 5/8"
HARDWARE

16
Installation
9 Connect the Door Arm to the Trolley
IMPORTANT: The groove on the straight door arm MUST face away from the curved door
arm.
1. Close the door. Disconnect the trolley by pulling the emergency release handle.
Slide the outer trolley back (away from the door) about 2" (5 cm).
2. Attach the straight door arm to the outer trolley using the clevis pin. Attach with
the ring fastener.
3. Attach the curved door arm to the door bracket using the clevis pin. Attach with
the ring fastener.
4. Align the straight door arm with the curved door arm. Select two aligned holes (as
far apart as possible) and attach using the bolts, nuts and lock washers.
NOTE: If the holes do not line up, reverse the straight door arm. Select two aligned holes
(as far apart as possible) and attach using the bolts, nuts and lock washers.
5. Pull the emergency release handle toward the garage door opener until the trolley
release arm is horizontal. The trolley will re-engage automatically when the garage
door opener is activated.
Straight
Door Arm Curved
Door
Arm
(Groove
facing
out)
CORRECT
Straight
Door
Arm Curved
Door
Arm
INCORRECT
Clevis Pin 5/16" x 1-1/4"
Ring Fastener
Clevis Pin
5/16" x 1"
Nut 5/16"-18
Lock
Washer
5/16"
Hex Bolt
5/16"-18 x 7/8"
HARDWARE
Hex Bolt 5/16"-18 x 7/8"
Nut 5/16"-18
Lock Washer 5/16"
Clevis Pin 5/16" x 1"
Clevis Pin 5/16" x 1-1/4"
Ring Fastener

17
Install the Door Control
1 Install the Door Control
To prevent possible SERIOUS INJURY or DEATH from electrocution:
lBe sure power is NOT connected BEFORE installing door control.
lConnect door control ONLY to 12 VOLT low voltage wires.
To prevent possible SERIOUS INJURY or DEATH from a closing garage door:
lInstall 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.
lNEVER permit children to operate or play with door control push buttons or
remote control transmitters.
lActivate door ONLY when it can be seen clearly, is properly adjusted, and
there are no obstructions to door travel.
lALWAYS keep garage door in sight until completely closed. NEVER permit
anyone to cross path of closing garage door.
INTRODUCTION
Compatible with MyQ®and Security+ 2.0®accessories, see page 40. Your garage door
opener is compatible with up to 2 Smart Control Panels or 4 of any other Security+ 2.0®
door controls. NOTE:Older LiftMaster door controls and third party products are not
compatible.
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: Your product may look different than the illustrations.
HARDWARE
Screw
6AB x 1" (2)
Drywall
Anchors (2)
Screw
6-32 x 1" (2)
1. Strip 7/16" (11 mm) of insulation from one end of the wire and separate the wires.
2. Connect one wire to each of the two screws on the back of the door control. The
wires can be connected to either screw.
PRE-WIREDINSTALLATIONS:Choose any two wires to connect, note which
wires are used so the correct wires are connected at the garage door opener in a
later step.
3. Mark the location of the bottom mounting hole and drill a 5/32" 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" 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.
7/16" (11 mm) Wall
1 2 3
DRYWALL GANG BOX
6AB x 1"
6-32 x 1"
Drywall Anchor
4-5 6
6-32 x 1"
GANG BOX
8 DRYWALL
6AB x 1"
Drywall Anchor
7

18
Install the Door Control
2 Wire the door control to the garage door opener
HARDWARE
Insulated Staple
(Not Shown)
PRE-WIRED INSTALLATIONS: When wiring the door control to the garage door opener
make sure you use the same wires that are connected to the door control.
1. 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.
2. Strip 7/16 inch (11 mm) of insulation from the end of the wire near the garage
door opener.
3. Connect the wire to the red and white terminals on the garage door opener. To
insert or release wires from the terminal, push in the tab with screwdriver tip.
7/16" (11 mm)
2
3
1
Staple
RED WHITE WHITE GREY
3 Attach the warning labels
1. Attach the entrapment warning label on the wall near the door control with tacks
or staples.
2. Attach the manual release/safety reverse test label in a visible location on the
inside of the garage door.

19
Install the Protector System®
Introduction
Be sure power is NOT connected to the garage door opener BEFORE installing the
safety reversing sensor.
To prevent SERIOUS INJURY or DEATH from closing garage door:
lCorrectly connect and align the safety reversing sensor. This required safety
device MUST NOT be disabled.
lInstall the safety reversing sensor so beam is NO HIGHER than 6" (15 cm)
above garage floor.
IMPORTANT INFORMATION ABOUT THE SAFETY REVERSING SENSORS
The safety reversing sensors must be connected and aligned correctly before the
garage door opener will move in the down direction.
The sending sensor (with an amber LED) transmits an invisible light beam to the
receiving sensor (with a green LED). If an obstruction breaks the light beam while the
door is closing, the door will stop and reverse to the full open position, and the garage
door opener lights will flash 10 times.
NOTE: For energy efficiency the garage door opener will enter sleep mode when the door
is fully closed. The sleep mode shuts the garage door opener down until activated. The
sleep mode is sequenced with the garage door opener light bulb; as the light bulb turns
off the sensor LEDs will turn off and whenever the garage door opener lights turn on the
sensor LEDs will light. The garage door opener will not go into the sleep mode until the
garage door opener has completed 5 cycles upon power up.
When installing the safety reversing sensors check the following:
lSensors are installed inside the garage, one on either side of the door.
lSensors are facing each other with the lenses aligned and the receiving sensor
lens does not receive direct sunlight.
lSensors are no more than 6 inches (15 cm) above the floor and the light beam is
unobstructed.
Invisible Light Beam
Protection Area
Safety Reversing Sensor
6" (15 cm) max. above floor
Safety Reversing Sensor
6" (15 cm) max. above floor

20
Install the Protector System®
1 Install the Safety Reversing Sensors
HARDWARE
Carriage Bolt
1/4"-20 x 1/2" Wing Nut
1/4"-20
The safety reversing sensors can be attached to the door track, the wall, or the floor. If
the door track will not support the sensor bracket a wall installation is recommended.
Choose one of the following installations.
OPTION A DOOR TRACK INSTALLATION
1. Slide the curved arms of the sensor bracket around the edge of the door track.
Snap into place so that the sensor bracket is flush against the track.
2. Slide the carriage bolt into the slot on each sensor.
3. Insert the bolt through the hole in the sensor bracket and attach with the wing
nut. The lenses on both sensors should point toward each other. Make sure the
lens is not obstructed by the sensor bracket.
No more
than 6 inches
(15 cm) Carriage Bolt
1/4"-20 x 1/2"
Wing Nut
1/4"-20
123
OPTION B WALLINSTALLATION
If additional clearance is needed an extension bracket (not provided) or wood blocks can
be used. Make sure each bracket has the same amount of clearance so they will align
correctly.
1. Position the sensor bracket against the wall with the curved arms facing the door.
Make sure there is enough clearance for the beam to be unobstructed. Mark
holes.
2. Drill 3/16 inch pilot holes for each sensor bracket and attach the sensor brackets
to the wall using lag screws (not provided).
3. Slide the carriage bolt into the slot on each sensor.
4. Insert the bolt through the hole in the sensor bracket and attach with the wing
nut. The lenses on both sensors should point toward each other. Make sure the
lens is not obstructed by the sensor bracket.
(Not provided)
No more than
6 inches (15 cm)
12
Inside
Garage
Wall
(Not provided)
Lens
Carriage Bolt
1/4"-20 x 1/2"
Wing Nut
1/4"-20
34