Chamberlain HD520EV User manual

www.chamberlain.com
CONTENTS
Preparation .............................. 1-4
Assembly................................. 5-9
Installation............................ 10-19
Install the Door Control ............. 20-21
Install the Protector System®...... 22-25
Power.................................. 26-27
Adjustments .......................... 28-30
Operation.................................. 31
Features................................... 32
Door Control .......................... 33-34
Remote Control ...................... 34-35
To Erase the Memory.................... 35
To Open the Door Manually ............ 35
Maintenance.............................. 36
Troubleshooting...................... 37-38
Accessories............................... 39
Warranty .................................. 40
Repair Parts .......................... 41-42
1/2 hp Belt Drive
Garage Door 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✚2.0™ accessories.
■ DO NOT enable the Timer-to-Close feature if you are installing the garage door
opener on a one-piece door. The Timer-to-Close is to be used ONLY with sectional
doors.
Serial Number:
Date of Purchase:
Model HD520EV
FOR RESIDENTIAL USE ONLY
Write down the following information
for future reference:
.
.
The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196

1
Safety Symbol and Signal Word Review
This garage door opener has been designed and tested to offer safe service provided it isinstalled,
operated,maintained and tested in strictaccordance 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 ifyou do notcomply with the warnings that accompanythem.The
hazard may come from something mechanical or from electric shock. Read the warningscarefully.
Mechanical
Electrical
When you see this Signal Word on the following pages,it will alert you to the possibilityof damage to
your garage door and/or the garage door opener ifyou do notcomplywith the cautionarystatementsthat
accompany it. Read them carefully.
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.
To preventdamage to garage door and opener:
lALWAYS disable locks BEFORE installing and operating the opener.
lONLY operate garage door opener at120 V,60 Hzto avoid malfunction and damage.
Before you begin:
1. Disable locks and remove any ropesconnected 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 checkfor 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 bottomof the door mustnotexceed 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 wayof the header
bracket, it may be installed within 4feet (1.2 m) to the left or right of
the door center. See page11.
Torsion
Spring
Extension
Spring
OR
Preparation

2
Additional Items You May Need:
Surveyyour garage area to see ifyou will need any of the following items:
n(2) 2X4 PIECES OF WOOD
Maybe 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.
nSUPPORT BRACKET AND FASTENING HARDWARE
Must be used if you have a finished ceiling in your garage.
nEXTENSION BRACKETS (MODEL 041A5281-1) OR WOOD BLOCKS
Depending upon garage construction,extension brackets or wood blocksmay be needed to
install the safety reversing sensor.
nFASTENING HARDWARE
Alternate floor mounting of the safety reversing sensor will require hardware not provided.
nOUTSIDE QUICK RELEASE (MODEL 7702CB)
Required for a garage with NO accessdoor.
nDOOR REINFORCEMENT
Required if you have a lightweight steel, aluminum, fiberglass or glass panel door.
nRAIL EXTENSION KIT
Required ifyour garage door is more than 7 feet (2.13 m) high.
Tools Needed
2
1
3/16
7/16
1/2
7/32
5/16
3/8 7/16
1/2
Preparation

3
Carton Inventory
Your garage door opener ispackaged in one carton which contains the motor unit and all parts
illustrated below.Accessories vary depending on the garage door opener model purchased.Depending
on your model, other accessoriesmay be included with your garage door opener. Instructions for these
accessorieswill be attached to the accessory and are not included in this manual.Ifanything ismissing,
carefully checkthe packing material. Hardware for assembly and installation is shown on the nextpage.
Save the carton and packing material until the installation and adjustment is complete. The images
throughout this manual are for reference only and your product may look different.
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 front and 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/black wire attached: Sending Sensor
(1), Receiving Sensor (1), and Safety Sensor Brackets (2)
NOT SHOWN
White and red/white wire
Owner's manual
Preparation

4
Hardware Inventory
Clevis Pin 5/16"x1-1/2"
Ring Fastener (3)
Hex Bolt 5/16"-18x7/8" (4)
Lock Washer
5/16"-18 (5)
Nut
5/16"-18 (6)
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)
ASSEMBLY HARDWARE INSTALLATION HARDWARE
Screw 6ABx1" (2)
Drywall Anchors (2)
Screw 6-32x1" (2)
DOOR CONTROL HARDWARE
Insulated
Staples
(Not Shown)
Lag Screw 5/16"-9x1-5/8" (4)
Hex Screw
#8x3/8" (2)
(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
Spring
Trolley Nut
Threaded
Shaft
with
Preparation

5
Assembly
STEP 1 Assemble the rail and install the trolley
To prevent INJURY from pinching,keep hands and fingers away from the joints while assembling the
rail.
To avoid installation difficulties, do not run the garage door opener until instructed to do so.
The front rail has a cut out “window” at the door end. The front and back rail both have rail tabs. These
rail tabs MUST be on top of the rail when assembled.
1. Remove the straight door arm and hanging bracket packaged inside the front rail and setaside
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 endsinto the larger ones.
Tabsalong the side will lockinto place.
3. Place the motor unit on packing material to protect the cover,and rest the back end of the rail on
top. For convenience,put a support under the front end ofthe rail.
4. As a temporary stop,inserta screwdriver into the hole 10" (25 cm) from the front end ofthe rail,
as shown.
5. Check to be sure there are 4 plasticwear pads inside the inner trolley.Ifthey became loose
during shipping, check all packing material. Snap them back into position as shown.
6. Slide the trolley assembly along the rail from the back end to the screwdriver.
7. Slide the rail onto the “U” bracket, until itreaches all the stops on the top and sides of the “U”
bracket.
To garage
door opener
(TO MOTOR UNIT)
Front Rail
Section
(TO DOOR)
“U” Bracket
Outer Trolley
Inner Trolley
Wear Pads
SLIDE TO STOPS
ON TOP AND
SIDES OF
“U” BRACKET
Rail
Tab
Trolley
Window
Cut-Out
Idler
Pulley
Hole

6
Assembly
STEP 2 Fasten the rail to the motor unit
To avoid SERIOUS damage to garage door opener, use ONLY those bolts/fastenersmounted in the
top of the opener.
1. Insert a 1/4"-20x1-3/4" boltinto the cover protection bolt hole on the backend of the rail as
shown.Tighten securely with a 1/4"-20 locknut. DO NOT overtighten.
2. Remove the boltand nut from the top ofthe motor unit.
3. Use the carton to supportthe frontend of the rail.
4. Place the “U” bracket,flat side down onto the motor unit and align the bracketholes with the bolt
holes.
5. Fasten the “U” bracket with the previously removed bolt and locknut; DO NOT use any power
tools.The use ofpower toolsmaypermanentlydamage the garage door opener.
HARDWARE
Bolt 1/4"-20x1-3/4"
Lock Nut 1/4"-20
(Mounted in the
Bolt and Nut
garage door opener)
“U” Bracket
Bolt
Cover Protection
Bolt Hole
Bolt 1/4"-20x1-3/4"
Lock Nut 1/4"-20
Lock Nut

7
Assembly
STEP 3 Install the idler pulley
1. Lay the belt beside the rail, as shown.Grasp the end with the hooked trolley connector and pass
approximately12" (30 cm) ofbelt through the window.Keep the ribbed side toward the rail, and
allowitto hang until AssemblyStep 4.
2. Remove the tape from the idler pulley. The inside center should be pre-greased. If dry,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" lockwasher and
nut underneath the rail until the lock washer is compressed.
5. Rotate the pulleyto be sure itspins freely.
6. Locate the rail tab.The rail tab is between the idler bolt and the trolley in the front rail section. Use
a flathead screwdriver and lift the rail tab until the tab is vertical (90º).
HARDWARE
Bolt Nut 3/8"
Lock Washer 3/8"
Screwdriver
Rail
Trolley Connector
Bolt
Lock Washer 3/8"
Nut 3/8"
Rail
Tab
CORRECT
INCORRECT
Rail Tab
Idler Pulley
Grease Inside Pulley

8
Assembly
STEP 4 Install the belt
1. Pull the belt around the idler pulley and toward the trolley. The ribbed side mustcontactthe
pulley.
2. Hook the trolley connector into the retaining slot on the trolley as shown (Figure 1).
3. With the trolley againstthe screwdriver, dispense the remainder of the belt along the rail
lengthtoward the motor unit and around the sprocket (Figure 2).The sprocket teeth mustengage
the belt.
4. Check to make sure the belt is nottwisted.Connect the 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 pinsand pastpin notches.
lSlide clip-on spring over cap and onto pin notches until both pinsare securely locked in
place.
5. Remove the spring trolley nutfrom the threaded shaft.
6. Insert the trolley threaded shaftthrough the hole in the trolley.
HARDWARE
Master
Link
Threaded Shaft with Spring Trolley Nut
Sprocket
Figure 3
Front Rail
Section
(TO DOOR)
Idler
Pulley
Threaded Shaft
Master
Link
Figure 2
Trolley Connector
Figure 1
Retaining
Slot

9
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 not use any tools. Remove the screwdriver.
2. Insert a flathead screwdriver tip into one ofthe nut ring slotsand brace itfirmly againstthe trolley.
3. Tighten the spring trolley nutwith an adjustable wrench or a 7/16" open end wrench about a
quarter turn until the spring releases and snaps the nut ring againstthe trolley.This setsthe
spring to optimum belt tension.
Nut Ring
BEFORE
1"
(2.5 cm)
Nut Ring
AFTER
1-1/4"
(3.18 cm)
Nut Ring Slot
Spring Trolley
STEP 6 Install the sprocket cover
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.
1. Position the sprocket cover over the sprocketasshown 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 #8x3/8"
Sprocket Cover

10
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 properlybalanced and lubricated garage door. An
improperly balanced door may NOT reverse when required and could result in SEVERE
INJURY or DEATH.
3. ALL repairsto cables,spring assembliesand 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 vehiclesto avoid accidental release.
7. NEVER connectgarage door opener to power source until instructed to do so.
8. NEVER wear watches, ringsor 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 ofthe garage door.
lout of reach of children at minimum height of 5 feet (1.5m).
laway from ALL moving parts of the door.
10. Place entrapment warning label on wall nextto garage door control.
11. Place manual release/safetyreverse 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,disconnectALL electric
and battery power BEFORE performing ANY service or maintenance.
14. DO 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.

11
Installation
STEP 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 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 mark the inside vertical centerline of the garage door.
2. 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 (see page 12) 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 bracketon a 2x4 (on wall or ceiling), use lag screws
(notprovided) to securely fasten the 2x4 to structural supports asshown here and on page 12.
3. Open your door to the highest pointoftravel asshown.Draw an intersecting horizontal line on
the header wall 2" (5 cm) above the high point:
l2" (5 cm) above the high pointfor sectional door and one-piece door with track.
l8" (20 cm) above the high pointfor one-piece door without track.
This heightwill 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12 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

12
Installation
STEP 2 Install the header bracket
You can attach the header bracketeither to the wall above the garage door, or to the ceiling.Followthe
instructions which will work bestfor 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"-9x1-5/8"
OPTION A WALL INSTALLATION
1. Center the bracketon the vertical centerline with the bottom edge ofthe bracket on the horizontal
line asshown (with the arrow pointing toward the ceiling).
2. Mark the vertical set ofbracket holes.Drill 3/16" pilot holes and fasten the bracketsecurelyto a
structural support with the hardware provided.
UP
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"-9x1-5/8"
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 awayfrom 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 bracketsecurely to a structural support with
the hardware provided.
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
5/16"-9x1-5/8"

13
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 bracketholes 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
5/16"x1-1/2"
Ring Fastener
STEP 4 Position the garage door opener
To preventdamage to garage door, rest garage door opener rail on 2x4 placed on top section of door.
1. Remove the packing material and liftthe garage door opener onto a ladder.
2. Fullyopen the door and place a 2x4 (laid flat) under the rail. For one-piece doors without tracks,
lay the 2x4 on it's side.
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.
One-piece
door without
tracks
All other door types
Connected Disconnected

14
Installation
STEP 5 Hang the garage door opener
To avoid possible SERIOUS INJURY from a falling garage door opener, fasten itSECURELY to
structural supportsof the garage.Concrete anchorsMUSTbe used if installing ANY brackets into
masonry.
Hanging the garage door opener will vary depending on your garage.Below are three example
installations. Your installation maybe different.For ALL installations the garage door opener MUST be
connected to structural supports. The instructions illustrate one ofthe examples below.
Finished
Ceiling
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"
1. On finished ceilings,use the lag screws to attach a supportbracket (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 ofthe garage door opener to the supportbracket.
3. Cutboth pieces of the hanging bracket to required lengths.
4. Attach the end of each hanging bracketto the supportbracketwith appropriate hardware (not
provided).
5. Attach the garage door opener to the hanging brackets with the hex bolts,lock washers,and
nuts.
6. Remove the 2x4 and manuallyclose the door. If the door hits the rail, raise the header bracket.
Finished
Ceiling (not provided)
Lag Screw
5/16"-
9x1-5/8"
Lag Screw
5/16"-
9x1-5/8"
123
(not
provided)
Hex Bolt
5/16"- 18x7/8"
Nut 5/16"-18
Lock Washer
5/16"-18
456

15
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 compactfluorescent (26W maximum) light
bulbs.
lDO NOTuse 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 sides ofthe light lens and rotate the light lens down.
2. Insert an A19 incandescent (100W maximum) or compact fluorescent (26W, 100W equivalent)
lightbulb into the light socket.
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 DEATH from a falling garage door:
lIf possible, use emergency release handle to disengage trolley ONLY when garage door is
CLOSED. Weak or broken springsor unbalanced door could resultin 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.Ifrope knotbecomes untied, you could fall.
1. Insert one end of the emergencyrelease rope through the handle.Make sure that “NOTICE” is
rightside up.Tie a knot atleast1 inch (2.5 cm) from the end of the emergencyrelease rope.
2. Insert the other end of the emergencyrelease 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
contactwith vehiclesto preventaccidental release and secure with a 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.

16
Installation
STEP 8 Install the door bracket
Fiberglass, aluminum or lightweight steel garage doors WILL REQUIRE reinforcement BEFORE
installation ofdoor 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 ofthe top
panel. Contact the garage door manufacturer or installing
dealer for opener reinforcement instructionsor
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.
Self-Threading Screw
1/4"-14x5/8"
HARDWARE
OPTION A 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 ofthe bracket 2"-4" (5-10 cm) belowthe top edge of the door, OR directly
below any structural support acrossthe 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 bracketusing the two self threading screws. (Figure
1)
lAlternately, use two 5/16" 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"x2" 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 Centerline
of Garage Door
Bolt 5/16"-18x2"
(not provided)
Lock Washer 5/16"
Nut 5/16"-18
Door Bracket
UP
Vertical
Centerline
of Garage
Door
UP
Vertical Centerline of
Garage Door
Bolt 5/16"-18x2"
(not provided)
UP
Inside Edge of Door or
Reinforcement Board
Self-Threading Screw
1/4"-14x5/8"
Self-Threading
Screw
1/4"-14x5/8"

17
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 bracket as shown.
2. Mark either the left and right,or the top and bottom holes.
Metal Doors:
lDrill 3/16" pilot holes and fasten the bracket with the self-threading screwsprovided.
Wood Doors:
lDrill 5/16" holes and use 5/16"x2" 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.)
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
Carriage Bolt 5/16"x2"
(not provided)
Nut 5/16"-18
Lock Washer 5/16"
Metal Door Wood Door
Self-Threading
Screw 1/4"-14x5/8"

18
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 armMUSTface awayfrom the curved door arm.
1. Close the door.Disconnectthe trolley by pulling the emergencyrelease handle.
2. Attach the straightdoor arm to the outer trolley using the clevis pin.Secure with the ring fastener.
3. Attach the curved door arm to the door bracket using the clevis pin.Secure with the ring fastener.
4. Bring arm sections together. Find two pairs ofholes that line up and join sections.Selectholes as
far apart as possible to increase door arm rigidity and attach using the bolts, nuts, and lock
washers.
5. Pull the emergencyrelease 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.
NOTE: If the holes in the curved door arm and the straight door arm do not align, reverse the straight
door arm,selecttwo 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
Straight
Door Arm Curved
Door
Arm
(Groove
facing
out)
CORRECT
Straight
Door
Arm Curved
Door
Arm
INCORRECT
Lock Washer
5/16" -18
Nut
5/16"-18
Hex Bolt 5/16"-18x7/8"
Clevis Pin 5/16"x1-1/4"
Ring Fastener Clevis Pin
5/16"x1"

19
Installation
STEP 9 Connect the door arm to the trolley (continued)
OPTION B ONE-PIECE DOORS
IMPORTANT: The groove on the straightdoor armMUSTface awayfrom the curved door arm.
1. Close the door.Disconnectthe trolley by pulling the emergencyrelease handle.
2. Fasten the straight door arm and the curved door arm together to the longest possible length
(with a 2 or 3 hole overlap) using the bolts, nuts,and lockwashers.
3. Attach the straightdoor arm to the door bracketusing the clevis pin.Secure with the ring fastener.
4. Attach the curved door arm to the trolley using the clevis pin.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
Straight
Door Arm
Curved
Door
Arm
(Groove
facing out)
CORRECT INCORRECT
Straight
Door
Arm
Curved
Door
Arm
Ring
Fastener Ring Fastener
Nut 5/16"-18
Nut 5/16"-18
Ring
Fastener
Ring Fastener
Lock Washer 5/16" -18
Lock Washer 5/16" -18
Clevis Pin 5/16"x1-1/4"
Clevis Pin
5/16"x1-1/4"
Hex Bolt 5/16"-18x7/8"
Hex Bolt 5/16"-18x7/8"
Clevis Pin
5/16"x1"
Clevis Pin
5/16"x1"