Chamberlain BC550C User manual

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Contents
Preparation......................................2-5
Assembly .......................................6-10
Installation ..................................11-28
Install the Door Control ............21-22
Install the Protector System® ....23-26
Connect power.........................27-28
Adjustments.................................29-31
MyQ® Smartphone Control.................32
Operation.....................................33-39
Using your Garage Door Opener.....34
To Open the Door Manually ...........34
Motion Detecting
Control Panel........................... 35-36
Multi-Function Control Panel.... 37-38
Remote Control.............................38
Homelink® ...................................38
To Erase the Memory .....................39
Maintenance .....................................40
Troubleshooting...........................41-42
Accessories........................................43
Warranty...........................................44
Repair Parts .................................45-47
Owner’s Manual
B550C • B750C • B751C
Belt Drive
Garage Door Opener
FOR RESIDENTIAL USE ONLY
PRE-PROGRAMMED REMOTE CONTROL
INCLUDED
www.chamberlain.com
www.mychamberlain.com
Smart Garage Opener
• 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®is connected
and properly aligned.
• Periodic checks of the garage door opener are required to ensure
safe operation.
• The model number label is located on the left side panel of your
garage door opener.
• This garage door opener is compatible with MyQ® and
Security+b2.0® 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.

2
Safety Symbol and Signal Word Review
This garage door opener hasbeen designed and tested to offer safe service provided it isinstalled,
operated,maintained and tested in strict accordance with the instructionsand warnings contained in
this manual.
Mechanical
Electrical
When you see these Safety Symbols and Signal
Words on the following pages,they will alertyou 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, itwill alert you to the possibility ofdamage
to your garage door and/or the garage door
opener if you do notcomplywith the cautionary
statements that accompany it. Read them carefully.
WARNING: This productcan expose you to chemicalsincluding lead,which are known to the
State of California to cause cancer or birth defectsor 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 ofsight of the door isconsidered
unattended close.The Timer-to-Close (TTC) feature,the MyQ®Smartphone Control, and anyother
MyQ®devices are to be used ONLY with sectional doors.
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 mayNOT 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Hzto avoid malfunction and damage.
Before you begin:
1. Disable locks and remove anyropes 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 ofthe door. Any gap between the floor
and the bottom ofthe door mustnot exceed 1/4 inch (6 mm).
Otherwise, the safety reversal system may not work properly.
5. The opener should be installed above the center ofthe door.If there is
a torsion spring or center bearing plate in the way ofthe header
bracket, it may be installed within 4feet (1.2 m) to the leftor right ofthe
door center.See page 12.
Torsion
Spring
Extension
Spring
OR
Preparation

3
Test the Wi-Fi®Signal Strength in your garage
You will need a router with Wi-Fi and a smartphone or other mobile device.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.
Wi-Fi signal is weak.
The garage door opener will likely connect to your Wi-Fi
network. If not, try one of the options below.
No Wi-Fi signal. Try one of the following:
• Move your router closer to the garage door opener to
minimize interference from walls and other objects
• Buy a Wi-Fi range extender
• Buy a Chamberlain MyQ®Internet Gateway (CIGBUC) see page 40
Check Signal Strength. If you see:
Wi-Fi signal is strong. You’re all set!
Install your new garage door opener.
Visit wifihelp.chamberlain.com for more details
See MyQ®Smartphone Control page 32 to connectyour garage door opener to your Wi-Fi network.
Additional Items You May Need:
Survey your garage area to see if you will need any of the following items:
l(2) 2X4 Pieces of wood : May be used to fasten the header bracket to the structural supports.
Also used to position the garage door opener during installation and for testing the safety
reversing sensors.
lSupport bracket and fastening hardware: Must be used ifyou have a finished ceiling in your
garage.
lExtension brackets (MODEL 041A5281-1) or wood blocks: Depending upon garage
construction, extension brackets or wood blocks may be needed to install the safety reversing
sensor.
lFastening hardware: Alternate floor mounting of the safetyreversing sensor will require
hardware notprovided.
lDoor reinforcement: Required if you have a lightweight steel, aluminum, fiberglass or glass
panel door.
lRail extension kit: Required ifyour garage door ismore than 7 feet(2.13 m) high.
Tools Needed
3/16
7/16
1/2
5/32
5/16
5/8
9/16
1/4
7/16
Preparation

4
Carton Inventory
Save the carton and packing material until the installation and adjustmentis complete.Instructions for
the accessories will be attached to the accessory and are notincluded in this manual. The images
throughout this manual are for reference only and your product may look different.
Model Power Door Control Remote Control Wireless Keypad
B550C Med Lift Power System™ Multi-Function 3-button (2) ü
B750C PlusLiftPower System™ Motion Detecting 3-button (2) ü
B751C PlusLiftPower System™ Motion Detecting 3-button (2) ü
A. Header bracket
B. Pulley
C. Door bracket
D. Curved door arm
E. Straight door arm
(Packaged inside front rail section)
F. Trolley
NOTE: Be sure to assemble the trolley before sliding onto rail.
G. Emergency release rope and handle
H. Rail (1 frontand 4 center sections)
I. Hanging brackets (2)
(Packaged inside the front rail section)
J. Garage door opener (motor unit)
K. Sprocket cover and screws
L. “U” bracket
M. Belt
N. Door control
O. Remote control
P. The Protector System®
Safety reversing sensorswith 2 conductor white and white/blackwire attached: Sending
Sensor (1), Receiving Sensor (1), and Safety Sensor Brackets(2)
NOT SHOWN
Wireless Keypad Owner's manual
White and red/white wire Hardware
N
A
B
C
H
K
J
OP
I
D
E
F
G
L
M
OR
Preparation

5
Hardware
ASSEMBLY INSTALLATION DOOR CONTROL
Insulated Staples
(Not Shown)
Clevis Pin 5/16"x1-1/2"
Ring
Fastener (3)
Hex Bolt 5/16"-18x7/8" (4)
Self-Threading Screw
1/4"-14x5/8" (2)
Clevis Pin 5/16"x1" Clevis Pin 5/16"x1-1/4"
Carriage Bolt
1/4"-20x1/2" (2)
Wing Nut
1/4"-20 (2)
Lag Screw 5/16"-9x1-5/8" (4)
Screw 6ABx1" (2)
Drywall Anchors (2)
Screw 6-32x1" (2)
Hex Screw #8x3/8" (3)
(packed with the
sprocket cover)
Bolt
1/4"-20x1-3/4"
Lock Nut
1/4"-20
Bolt
Nut 3/8"
Lock Washer 3/8"
Master Link
Threaded
Shaft with
Spring
Trolley Nut
Lock Washer
5/16"-18 (4)
Nut
5/16"-18 (4)
Preparation

6
Assembly
STEP 1 Assemble the rail and install the trolley
To prevent INJURY from pinching, keep hands and fingers awayfrom the jointswhile assembling the
rail.
To avoid installation difficulties, do not run the garage dooropener until instructed to do so.
The front rail has a cut out “window” at the door end. The rail tab MUST be on top of the rail when
assembled.
1. Remove the straight door arm and hanging bracket packaged inside the front rail and set
aside for Installation Step 5 and 9. NOTE: To prevent INJURY while unpacking the rail
carefully remove the straight door arm stored within the rail section.
2. Align the rail sections on a flat surface as shown and slide the tapered ends into the larger
ones. Tabs along the side will lock into place.
3. Place the motor unit on packing material to protect the cover, and restthe backend of the rail
on top. For convenience,put a support under the frontend ofthe rail.
4. As a temporary stop, insert a screwdriver into the hole in the second rail section from the motor
unit, as shown.
5. Check to be sure there are 4 plastic wear padsinside the inner trolley.If they became loose
during shipping, check all packing material. Snap them back into position as shown.
6. Slide the trolley assemblytoward the screwdriver asshown.
7. Slide the rail onto the “U” bracket,until itreaches all the stops on the top and sides ofthe “U”
bracket.
Wear Pads
Front Rail Section
(TO DOOR)
“U” Bracket
(TO MOTOR UNIT)
Trolley
Rail Tab
On Top
Slide to stops
on top and sides
of “U” bracket
Screwdriver

7
Assembly
STEP 2 Fasten the rail to the motor unit
To avoid SERIOUS damage to garage door opener, use ONLY those bolts/fasteners mounted in the
top ofthe opener.
1. Insert a 1/4"-20 x1-3/4" bolt into the cover protection bolthole on the back end of the rail as
shown.Tighten securely with a 1/4"-20 locknut. DO NOT overtighten.
2. Remove the boltsfrom the top of the motor unit.
3. Use the carton to supportthe front end of the rail.
4. Place the “U” bracket, flat side down onto the motor unit and align the bracket holes with the
bolt holes.
5. Fasten the “U” bracketwith the previouslyremoved bolts; DO NOTuse any power tools. The
use of power toolsmay permanently damage the garage door opener.
Bolt
1/4"-20x1-3/4"
Lock Nut
1/4"-20
HARDWARE
“U” Bracket
Cover Protection
Bolt Hole
Bolt
Lock Nut
Bolts (Mounted in the
garage door opener)

8
Assembly
STEP 3 Install the idler pulley
1. Lay the beltbeside the rail, asshown.Grasp the end with the hooked trolley connector and
passapproximately 12" (30 cm) of beltthrough the window. Keep the ribbed side toward the
rail,and allow it to hang until AssemblyStep 4.
2. Remove the tape from the idler pulley.The inside center should be pre-greased. Ifdry,
regrease to ensure proper operation.
3. Place the idler pulley into the window asshown.
4. Insert the idler bolt from the top through the rail and pulley. Tighten with a 3/8" lock washer
and nut underneath the rail until the lockwasher is compressed.
5. Rotate the pulley to be sure it spins freely.
6. Locate the rail tab. The rail tab isbetween the idler boltand the trolley in the front rail section.
Use a flathead screwdriver and liftthe rail tab until the tab isvertical (90º).
Rail
Idler Pulley
Grease Inside
Pulley
Bolt
Belt
Lock Washer
Nut
Bolt Nut 3/8" Lock Washer 3/8"
HARDWARE
Trolley Connector
Rail Tab

9
Assembly
STEP 4 Install the belt
1. Pull the beltaround the idler pulley and toward the trolley.The ribbed side must contact the
pulley.
2. Hook the trolley connector into the retaining slot on the trolley asshown (Figure 1).
3. With the trolley againstthe screwdriver,dispense the remainder ofthe belt along the rail
lengthtoward the motor unitand around the sprocket (Figure 2). The sprocket teeth must
engage the belt.
4. Check to make sure the belt isnot twisted.Connectthe trolley threaded shaft with the master
link(Figure 3).
lPush pins of master link bar through holes in end of belt and trolley threaded shaft.
lPush master link cap over pins and pastpin notches.
lSlide the closed end of the clip-on spring over one of the pins.Push the open end ofthe
clip-on spring onto the other pin.
5. Remove the spring trolley nutfrom the threaded shaft.
6. Insert the trolley threaded shaft through the hole in the trolley.
HARDWARE
Master Link
Figure 3
Threaded Shaft with Spring Trolley Nut
Threaded Shaft
Master Link
Sprocket
Figure 2
Figure 1 Trolley
Connector
Retaining
Slot

10
Assembly
STEP 5 Tighten the belt
1. By hand, thread the spring trolley nut on the threaded shaft until it is finger tight against the
trolley.Do notuse any tools.Remove the screwdriver.
2. Insert a flathead screwdriver tip into one of the nut ring slots and brace it firmlyagainst 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 releasesand snapsthe nut ring against the trolley.Thissets the
spring to optimum belt tension.
Spring
Trolley Nut
Nut Ring Slot
Nut RingNut Ring
AFTER
1-1/4" (3.18 cm)
BEFORE
1" (2.5 cm)
STEP 6 Install the sprocket cover
To avoid possible SERIOUS INJURY to finger from moving garage door opener:
lALWAYS keep hand clear ofsprocket while operating opener.
lSecurely attach sprocket cover BEFORE operating.
1. Position the sprocket cover over the sprocket asshown and fasten to the mounting plate with
8x3/8" hex screws provided.
You have now finished assembling your garage door opener. Please read the following warnings
before proceeding to the installation section.
Hex Screw #8x3/8"
(Packed with the sprocket cover)
HARDWARE
Hex Screw
Sprocket Cover

11
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 emergency 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 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.

12
Installation
STEP 1 Determine the header bracket location
To prevent possible SERIOUS INJURY or DEATH:
lHeader bracket MUSTbe RIGIDLY fastened to structural supporton header wall or ceiling,
otherwise garage door might NOT reverse when required. DO NOT install header bracket over
drywall.
lConcrete anchors MUSTbe 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.
Installation procedures vary according to garage door types. Follow the instructions which apply to your
door.
1. Close the door and markthe inside vertical centerline of the garage door.
2. Extend the line onto the header wall above the door.You can fasten the header bracketwithin
4 feet (1.22 m) ofthe leftor right ofthe door center only ifa torsion spring or center bearing
plate is in the way; or you can attach it to the ceiling (see page 13) when clearance is minimal.
(It may be mounted on the wall upside down ifnecessary,to gain approximately 1/2" (1 cm). If
you need to install the header bracketon a 2x4 (on wall or ceiling),use lag screws(not
provided) to securely fasten the 2x4 to structural supports as shown here and on page 13.
3. Open your door to the highestpointof travel as shown.Draw an intersecting horizontal line on
the header wall 2" (5 cm) above the high point:
l2" (5 cm) above the high point for sectional door and one-piece door with track.
l8" (20 cm) above the high point for one-piece door without track.
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 13 for
ceiling installation.
Header Wall Vertical Centerline of Garage Door
2x4 Structural
Supports
Level
(Optional)
Unfinished
Ceiling
2x4
OPTIONAL CEILING MOUNT
FOR HEADER BRACKET
Sectional door with curved track
Header Wall
Track
2" (5 cm)
Highest
Point of
Travel
Door
One-piece door with horizontal track
Header Wall
Track
2" (5 cm)
Highest
Point of
Travel
Door
One-piece door without track:
jamb hardware
Header Wall
8" (20 cm)
Highest
Point of
Travel
Door
Jamb
Hardware
One-piece door without track:
pivot hardware
Header Wall
8" (20 cm)
Highest
Point of
Travel
Door
Pivot

13
Installation
STEP 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
instructionswhich will work best for your particular requirements. Do not install the header bracket
over drywall. If installing into masonry, use concrete anchors (not provided).
Lag Screw 5/16"-9x1-5/8"
HARDWARE
OPTION A WALL INSTALLATION
1. Center the bracketon the vertical centerline with the bottom edge of the bracketon the
horizontal line as shown (with the arrow pointing toward the ceiling).
2. Mark the vertical set ofbracket holes.Drill 3/16" pilot holes and fasten the bracket securely to a
structural supportwith the hardware provided.
OPTION B CEILING INSTALLATION
1. Extend the vertical centerline onto the ceiling as shown.
2. Center the bracketon the vertical mark, no more than 6" (15 cm) from the wall.Make sure the
arrow is pointing away from the wall. The bracket can be mounted flush againstthe 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.
UP
Wall Mounting
Holes
WALL INSTALLATION
CEILING INSTALLATION
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
UP
Header Wall
Ceiling Mounting
Holes
Finished Ceiling
Vertical
Centerline of
Garage Door
Header
Bracket
6" (15 cm)
Maximum
Door Spring
Garage Door
Lag Screw

14
Installation
STEP 3 Attach the rail to the header bracket
1. Position the opener on the garage floor below the header bracket.Use packing material as a
protective base.
NOTE: If the door spring is in the way, you will need help. Have someone hold the opener
securely on a temporary support to allow the rail to clear the spring.
2. Position the rail bracket against the header bracket.
3. Align the bracket holes and join with a clevispin as shown.
4. Insert a ring fastener to secure.
HARDWARE
Clevis Pin
5/16"x1-1/2" Ring Fastener
Clevis Pin
Ring Fastener
STEP 4 Position the garage door opener
To prevent damage to garage door,restgarage 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. For one-piece doors without
tracks, laythe 2x4 on it'sside.
NOTE: 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
One-piece door
without tracks
2x4 2x4
All other
door types

15
Installation
STEP 5 Hang the garage door opener
To avoid possible SERIOUS INJURY from a falling garage door opener,fasten it SECURELY to
structural supports ofthe garage. Concrete anchors MUSTbe used if installing ANY brackets into
masonry.
Hanging the garage door opener will vary depending on your garage.Beloware three example
installations. Your installation maybe different.For ALL installations the garage door opener MUST be
connected to structural supports. The instructions illustrate one of the examples below.
1. On finished ceilings,use the lag screws to attach a support bracket(notprovided) to the
structural supports before installing the garage door opener.
2. Make sure the garage door opener isaligned with the header bracket. Measure the distance
from each side of the garage door opener to the support bracket.
3. Cutboth piecesof the hanging bracket to required lengths.
4. Attach the end ofeach hanging bracket to the supportbracketwith appropriate hardware (not
provided).
5. Attach the garage door opener to the hanging bracketswith the hex bolts,lockwashers, and
nuts.
6. Remove the 2x4 and manuallyclose the door.If the door hits the rail,raise the header bracket.
Finished Ceiling
Lag Screw
123
Not
Provided
Not Provided
Not Provided
Hex Bolt
Nut
Lock
Washer
4 5 6
Lag Screw
Finished Ceiling
EXAMPLES
Unfinished Ceiling
HARDWARE
Hex Bolt
5/16"- 18x7/8"
Nut
5/16"-18
Lock Washer
5/16"-18
Lag Screw
5/16"-9x1-5/8"

16
Installation
STEP 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 incandescentbulbslarger 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 sides of the light lensand rotate the light lens down.
2. Insert an A19 incandescent (100W maximum) or compact fluorescent (26W, 100W
equivalent) light bulb into the lightsocket.
3. Rotate the lens up to close.
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
controls.
or
or
STEP 7 Attach the emergency release rope and handle
To prevent possible SERIOUS INJURY or DEATHfroma falling garage door:
lIf possible, use emergencyrelease handle to disengage trolley ONLY when garage door is
CLOSED. Weak or broken springs or unbalanced door could result in an open door falling
rapidlyand/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 ofthe emergency release rope through the handle.Make sure that“NOTICE”
is right side up. Secure with an overhand knot at least1" (2.5 cm) from the end of the rope to
prevent slipping.
2. Insert the other end ofthe 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 preventaccidental 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.

17
Installation
STEP 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 reinforcementkit.Failure to reinforce the top section asrequired
according to the door manufacturer mayvoid 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
heightofthe top panel.Contactthe 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.
OPTION A SECTIONAL DOORS
1. Center the door bracket on the previouslymarked vertical centerline used for the header
bracket installation. Note correct UP placement, as stamped inside the bracket.
2. Position the top edge ofthe bracket 2"-4" (5-10cm) below the top edge ofthe 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 orlight weight doors usinga verticalangle ironbrace betweenthe door panelsupport and
the door bracket:
lDrill 3/16" fastening holes.Secure the door bracket using the two 1/4"-14x5/8" 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"-18x2" carriage bolts, lock washers and nuts (not provided).
(Figure4)
NOTE: The 1/4"-14x5/8" self-threading screws are not intended for use on wood doors.
FIGURE 1
FIGURE 3 FIGURE 4
FIGURE 2
Vertical
Reinforcement
Vertical
Centerline
of Garage Door
UP
Door Bracket
Vertical Reinforcement
Vertical Reinforcement
Horizontal Reinforcement
Vertical Centerline
of Garage Door
Hardware
(not provided)
Door Bracket
UP
Vertical
Centerline
of Garage Door
UP
Vertical Centerline of
Garage Door
Hardware
(not provided)
UP
Inside Edge of Door or
Reinforcement Board
Self-Threading Screw
Self-Threading
Screw
HARDWARE
Self-Threading Screw
1/4"-14x5/8"

18
Installation
STEP 8 Install the door bracket (continued)
OPTION B ONE-PIECE DOORS
1. Center the door bracket on the top of the door,in line with the header bracketas shown.
2. Mark either the leftand right, or the top and bottom holes.
Metal Doors:
lDrill 3/16" pilot holes and fasten the bracketwith the self-threading screwsprovided.
Wood Doors:
lDrill 5/16" holes and use 5/16"-18x2" carriage bolts,lock washers and nuts (not provided) or
5/16"x1-1/2" lag screws(not provided) depending on your installation needs.
NOTE: The door bracket may be installed on the top edge of the door if required for your installation.
(Refer to the dotted line optional placement drawing.)
HARDWARE
Self-Threading Screw
1/4"-14x5/8"
For a door with no exposed
framing, or for the optional
installation, use lag screws
5/16"x1-1/2" (not provided)
to fasten the door bracket.
Vertical
Centerline
of Garage
Door
Optional
Placement
of Door
Bracket
Door Bracket
Header Bracket
Header Wall
2x4 Support (Finished Ceiling)
Door
Bracket
Top of Door
(Inside Garage)
Top Edge of
Door
Optional
Placement
Optional
Placement
Top Edge
of Door
Top of Door
(Inside Garage)
Door
Bracket
Hardware
(not provided)
Hardware
(not provided)
Metal Door Wood Door
Self-Threading Screw

19
Installation
STEP 9 Connect the door arm to the trolley
Installation will vary according to the garage door type. Follow the instructions which apply to your door.
OPTION A SECTIONAL DOORS
IMPORTANT: The groove on the straightdoor arm MUSTface away from the curved door arm.
1. Close the door.Disconnectthe trolleyby pulling the emergency release handle.
2. Attach the straightdoor arm to the outer trolley using the clevispin. Secure with the ring
fastener.
3. Attach the curved door arm to the door bracket using the clevispin. Secure with the ring
fastener.
4. Bring arm sections together.Find two pairs ofholesthat line up and join sections.Selectholes
as far apartas possible to increase door armrigidity and attach using the bolts,nuts, and lock
washers.
5. Pull the emergencyrelease handle toward the garage door opener until the trolley release
arm ishorizontal. The trolley will re-engage automatically when the garage door opener is
activated.
NOTE: If the holes in the curved door arm and the straight door arm do not align, reverse the straight
door arm, select two holes (as far apart as possible) and attach using bolts, nuts, and lock washers. If the
straight door arm is hanging down too far, you may cut 6 inches (15 cm) from the solid end.
HARDWARE
Hex Bolt 5/16"-18x7/8"
Nut 5/16"-18
Lock Washer
5/16" -18
Clevis Pin 5/16"x1"Clevis Pin 5/16"x1-1/4"
Ring Fastener
Lock Washer
Nut
Hex Bolt
Clevis Pin
5/16"x1-1/4"
Ring Fastener
Clevis Pin 5/16"x1"
Straight
Door Arm
(Groove
facing out)
Curved
Door Arm

20
Installation
STEP 9 Connect the door arm to the trolley (continued)
OPTION B ONE-PIECE DOORS
IMPORTANT: The groove on the straightdoor arm MUSTface away from the curved door arm.
1. Close the door.Disconnectthe trolleyby pulling the emergency release handle.
2. Fasten the straight door arm and the curved door arm together to the longestpossible length
(with a 2 or 3 hole overlap) using the bolts,nuts,and lock washers.
3. Attach the straightdoor arm to the door bracketusing the clevispin. Secure with the ring
fastener.
4. Attach the curved door arm to the trolley using the clevispin. Secure with the ring fastener.
5. Pull the emergencyrelease handle toward the garage door opener until the trolley release
arm is horizontal.
HARDWARE
Hex Bolt 5/16"-18x7/8"
Nut 5/16"-18
Lock Washer
5/16" -18
Clevis Pin 5/16"x1"Clevis Pin 5/16"x1-1/4"
Ring Fastener
One-Piece Door without Track
One-Piece Door with Track
Ring Fastener
Ring Fastener
Ring Fastener
Nut
Nut
Ring Fastener
Lock Washer
Lock Washer
Clevis Pin 5/16"x1-1/4"
Clevis Pin
5/16"x1-1/4"
Hex Bolts
Hex Bolts
Clevis Pin
5/16"x1"
Clevis Pin
5/16"x1"
Straight Door Arm
(Groove facing out)
Curved Door Arm