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Contents

Owner’s Manual

B503C • B510C

Belt Drive

Garage Door Opener

FOR RESIDENTIAL USE ONLY

PRE-PROGRAMMED REMOTE CONTROL

INCLUDED

www.chamberlain.com

www.mychamberlain.com

• 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.

Garage Opener

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

Operation .....................................32-36

Features .......................................33

Using your Garage Door Opener .....34

Multi-Function Control Panel .........34

Remote Control and

Keyless Entry ................................35

Homelink® ...................................36

To Erase the Memory .....................36

To Open the Door Manually ...........37

Maintenance .....................................38

Troubleshooting ........................... 39-40

Accessories ........................................ 41

Warranty ........................................... 42

Repair Parts .................................43-44

2

Safety Symbol and Signal Word Review

Thisgarage door opener has been designed and tested to offer safe service provided it is installed,

operated,maintained and tested in strictaccordance with the instructions and warningscontained in

thismanual.

Mechanical

Electrical

When you see these Safety Symbolsand Signal

Words on the following pages,they will alertyou to

the possibility of serious injury or death ifyou do

not complywith the warningsthat accompany

them. The hazard may come fromsomething

mechanical or fromelectric shock.Read the

warningscarefully.

When you see this Signal Word on the following

pages, it will alertyou to the possibility of damage

to your garage door and/or the garage door

opener ifyou do notcomplywith the cautionary

statementsthat accompanyit.Read them carefully.

WARNING: Thisproduct can expose you to chemicalsincluding 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 thatallowsthe door to close withoutbeing in the line of sightofthe door is considered

unattended close. The Timer-to-Close (TTC) feature, the MyQ

®

Smartphone Control,and any other

MyQ

®

devicesare to be used ONLY with sectional doors.

Check the Door

To preventpossible SERIOUSINJURYor DEATH:

l ALWAYS call a trained door systemstechnician if garage door binds, sticks, or is out of balance.

An unbalanced garage door mayNOT reverse when required.

l NEVER tryto loosen,move or adjust garage door,door springs, cables, pulleys,brackets or

their hardware, ALLof which are under EXTREME tension.

l Disable ALLlocks and remove ALLropes connected to garage door BEFORE installation and

operating garage door opener to avoid entanglement.

l DO NOT install on a one-piece door if using devices or features providing unattended close.

Unattended devicesand featuresare to be used ONLY with sectional doors.

To preventdamage to garage door and opener:

l ALWAYS disable locks BEFORE installing and operating the opener.

l ONLY 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 entirelybyitssprings.

3. Raise and lower the door to checkfor binding or sticking. If your door

binds, sticks, or is outofbalance,call a trained door systems

technician.

4. Checkthe seal on the bottomofthe door. Any gap between the floor

and the bottomofthe door must not exceed 1/4 inch (6 mm).

Otherwise, the safetyreversal system may notwork 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, itmay be installed within 4feet(1.2 m) to the leftor rightofthe

door center.See page 12.

Torsion

Spring

Extension

Spring

OR

Preparation

3

Additional Items You May Need:

Survey your garage area to see if you will need anyofthe following items:

n (2) 2X4 PIECES OFWOOD

Maybe used to fasten the header bracketto the structural supports. Also used to position the

garage door opener during installation and for testing the safety reversing sensors.

n SUPPORT BRACKETANDFASTENING HARDWARE

Must be used if you have a finished ceiling in your garage.

n EXTENSIONBRACKETS (MODEL 041A5281-1) OR WOOD BLOCKS

Depending upon garage construction,extension brackets or wood blocksmay be needed to

install the safetyreversing sensor.

n FASTENING HARDWARE

Alternate floor mounting ofthe safetyreversing sensor will require hardware notprovided.

n DOOR REINFORCEMENT

Required if you have a lightweightsteel, aluminum, fiberglass or glass panel door.

n RAIL EXTENSION KIT

Required if your garage door is more 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 accessoryand are notincluded in this manual. The images

throughoutthis manual are for reference onlyand your product maylook different.

Model Power Door Control Remote Control Wireless Keypad

B503C Med Lift Power System™ Multi-Function 3-button (2)

B510C Med Lift Power System™ Multi-Function 3-button (2)

ü

A. Header bracket

B. Pulley

C. Door bracket

D. Curved door arm

E. Straightdoor arm (Packaged inside front rail section)

F. Trolley

NOTE: Be sure to assemble the trolley before sliding onto rail.

G. Emergencyrelease 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 sensors with 2 conductor white and white/blackwire attached: Sending

Sensor (1),Receiving Sensor (1), and SafetySensor Brackets (2)

NOTSHOWN

WirelessKeypad

White and red/white wire

Owner'smanual

Hardware

P

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" (2)

(packed with t

he

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 preventINJURY from pinching,keep handsand fingersaway fromthe joints while assembling the

rail.

To avoidinstallationdifficulties,donot run the garage dooropener until instructedtodo so.

The front rail has a cut out “window” at the door end. The rail tab MUST be on top ofthe rail when

assembled.

1. Remove the straightdoor arm and hanging bracketpackaged 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 flatsurface as shown and slide the tapered endsinto the larger

ones. Tabsalong the side will lockinto place.

3. Place the motor uniton packing material to protectthe cover, and rest the back end of the rail

on top.For convenience,puta supportunder the front end of the rail.

4. As a temporary stop, inserta screwdriver into the hole in the second rail section from the motor

unit,asshown.

5. Checkto be sure there are 4 plastic wear pads inside the inner trolley.If they became loose

during shipping, check all packing material. Snap them backinto position as shown.

6. Slide the trolleyassembly toward the screwdriver as shown.

7. Slide the rail onto the “U” bracket, until it reaches all the stops on the top and sides of the “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 of the 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 bolts fromthe top of the motor unit.

3. Use the carton to supportthe front end of the rail.

4. Place the “U” bracket, flatside down onto the motor unitand align the bracket holes with the

bolt holes.

5. Fasten the “U” bracketwith the previously removed bolts;DO NOTuse any power tools. The

use of power toolsmay permanentlydamage 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. Laythe beltbeside the rail, as shown. Grasp the end with the hooked trolley connector and

passapproximately12" (30 cm) of belt through the window.Keep the ribbed side toward the

rail,and allowitto hang until Assembly Step 4.

2. Remove the tape fromthe idler pulley. The inside center should be pre-greased. If dry,

regrease to ensure proper operation.

3. Place the idler pulley into the windowasshown.

4. Insert the idler boltfrom the top through the rail and pulley.Tighten with a 3/8" lockwasher

and nutunderneath the rail until the lock washer is compressed.

5. Rotate the pulley to be sure itspinsfreely.

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 liftthe rail tab until the tab is vertical (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 contactthe

pulley.

2. Hook the trolley connector into the retaining slot on the trolley as shown (Figure 1).

3. With the trolley against the screwdriver, dispense the remainder of the beltalong the rail

lengthtoward the motor unitand around the sprocket (Figure 2). The sprocket teeth must

engage the belt.

4. Checkto make sure the beltis nottwisted. Connectthe trolley threaded shaft with the master

link(Figure 3).

l Push pins ofmaster linkbar through holes in end ofbeltand trolleythreaded shaft.

l Push master link cap over pins and past pin notches.

l Slide the closed end of the clip-on spring over one ofthe pins. Push the open end ofthe

clip-on spring onto the other pin.

5. Remove the spring trolley nut from 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 nuton the threaded shaftuntil itis finger tightagainstthe

trolley.Do notuse any tools. Remove the screwdriver.

2. Insert a flathead screwdriver tip into one of the nutring slots and brace it firmly against the

trolley.

3. Tighten the spring trolley nutwith an adjustable wrench or a 7/16" open end wrench about a

quarter turn until the spring releasesand snaps the nutring againstthe trolley. This sets the

spring to optimumbelt 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 frommoving garage door opener:

l ALWAYS keep hand clear of sprocketwhile operating opener.

l Securelyattach sprocket cover BEFORE operating.

1. Position the sprocketcover over the sprocket as shown and fasten to the mounting plate with

8x3/8" hex screwsprovided.

Youhave now finished assembling yourgarage dooropener.Please read the following warnings

before proceeding to the installationsection.

Hex Screw #8x3/8"

(Packed with the sprocket cover)

HARDWARE

Hex Screw #8x3/8"

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

improperlybalanced door may NOT reverse when required and could result in SEVERE

INJURY or DEATH.

3. ALL repairs to cables,spring assembliesand other hardware MUSTbe 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, butat 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, ringsor loose clothing while installing or servicing opener. Theycould

be caught in garage door or opener mechanisms.

9. Install wall-mounted garage door control:

l within sight ofthe garage door.

l out of reach of small children ata minimum heightof 5feet (1.5m) above floors,landings,

steps or any other adjacent walking surface.

l away from ALL moving parts of the door.

10. Place entrapmentwarning label on wall nextto garage door control.

11. Place manual release/safety reverse test label in plain view on inside ofgarage door.

12. Upon completion ofinstallation,test safetyreversal 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 DEATHfrom electrocution, disconnect ALL electric

power BEFORE performing ANY service or maintenance.

14. DO NOTinstall on a one-piece door ifusing devicesor features providing unattended close.

Unattended devicesand featuresare to be used ONLY with sectional doors.

12

Installation

STEP 1 Determine the header bracket location

To preventpossible SERIOUS INJURY or DEATH:

l Header bracketMUSTbe RIGIDLY fastened to structural supporton header wall or ceiling,

otherwise garage door mightNOT reverse when required.DO NOT install header bracketover

drywall.

l Concrete anchors MUST be used if mounting header bracketor 2x4 into masonry.

l NEVER tryto loosen,move or adjust garage door,springs, cables, pulleys,brackets,or their

hardware,ALL of which are under EXTREME tension.

l ALWAYS call a trained door systemstechnician if garage door binds, sticks, or is out of balance.

An unbalanced garage door mightNOT reverse when required.

Installation procedures varyaccording to garage door types.Followthe instructions which applyto 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 bracketwithin

4 feet(1.22 m) of the leftor right ofthe door center onlyifa 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 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 (not

provided) to securelyfasten the 2x4 to structural supportsasshown here and on page 13.

3. Open your door to the highestpointoftravel as shown.Draw an intersecting horizontal line on

the header wall 2" (5 cm) above the high point:

l 2" (5 cm) above the high pointfor sectional door and one-piece door with track.

l 8" (20 cm) above the high point for one-piece door without track.

Thisheight 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 bracketeither to the wall above the garage door,or to the ceiling.Follow the

instructionswhich will work bestfor your particular requirements.Do not installthe header bracket

overdrywall.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 bottomedge of the bracketon the

horizontal line asshown (with the arrow pointing toward the ceiling).

2. Mark the vertical set of bracketholes. Drill 3/16" pilot holesand fasten the bracketsecurely 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

arrowispointing away fromthe wall.The bracketcan be mounted flush against the ceiling

when clearance is minimal.

3. Mark the side holes.Drill 3/16" pilotholes and fasten bracketsecurely 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 C

eiling

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 holesand join with a clevis pin 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 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. Fully open 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.

Connected Disconnected

One-piece door

without tra

cks

2x4 2x4

All other

door ty

pes

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 supportsofthe garage. Concrete anchorsMUSTbe used if installing ANY bracketsinto

masonry.

Hanging the garage door opener will vary depending on your garage. Below are three example

installations.Your installation may be 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 supportsbefore installing the garage door opener.

2. Make sure the garage door opener is aligned with the header bracket. Measure the distance

fromeach side of the garage door opener to the supportbracket.

3. Cutboth pieces of the hanging bracketto required lengths.

4. Attach the end ofeach 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 hitsthe rail, raise the header bracket.

Finished Ceiling

Lag Screw

1

2

3

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 preventpossible OVERHEATING of the end panel or lightsocket:

l Use ONLY A19 incandescent (100W maximum) or compactfluorescent(26W maximum) light

bulbs.

l DO NOT use incandescent bulbslarger than 100W.

l DO NOT use compact fluorescent lightbulbs larger than 26W (100W equivalent).

l DO NOT use halogen bulbs.

l DO NOT use short neckor specialty lightbulbs.

1. Pull on the top sides of the lightlens and rotate the lightlens down.

2. Insert an A19 incandescent (100Wmaximum) or compactfluorescent(26W,100W

equivalent) lightbulb into the light socket.

3. Rotate the lens up to close.

NOTE: Do notuse 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

STEP 7 Attach the emergency release rope and handle

To preventpossible SERIOUS INJURY or DEATHfrom a falling garage door:

l If possible,use emergency release handle to disengage trolley ONLY when garage door is

CLOSED. Weakor broken springsor unbalanced door could result in an open door falling

rapidly and/or unexpectedly.

l NEVER use emergencyrelease handle unless garage doorwayisclear of persons and

obstructions.

l NEVER use handle to pull door open or closed. If rope knot becomesuntied,you could fall.

1. Insert one end of the emergency release rope through the handle. Make sure that“NOTICE”

is rightside up.Secure with an overhand knot at least1" (2.5 cm) fromthe 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

contactwith 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.

17

Installation

STEP 8 Install the door bracket

Fiberglass,aluminumor lightweightsteel garage doorsWILLREQUIRE reinforcementBEFORE

installation of door bracket. Contactthe garage door manufacturer or installing dealer for opener

reinforcementinstructions or reinforcement kit.Failure to reinforce the top section asrequired

according to the door manufacturer may void the door warranty.

A horizontal and vertical reinforcementisneeded for lightweight garage doors(fiberglass,aluminum,

steel, doorswith glass panel,etc.) (notprovided). A horizontal reinforcementbrace should be long

enough to be secured to two or three vertical supports. A vertical reinforcementbrace should cover the

heightofthe top panel. Contactthe garage door manufacturer or installing dealer for opener

reinforcementinstructions 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

bracketinstallation.Note correctUP placement,asstamped inside the bracket.

2. Position the top edge of the bracket2"-4" (5-10cm) below the top edge ofthe door, OR

directlybelow any structural supportacrossthe top of the door.

3. Mark,drill holesand install as follows,depending on your door’s construction.

Metal or light weight doors usinga verticalangle iron brace between the doorpanelsupport and

the doorbracket:

l Drill 3/16" fastening holes. Secure the door bracket using the two 1/4"-14x5/8" self-threading

screws. (Figure1)

l Alternately,use two 5/16"-18x2" bolts, lock washers and nuts (not provided).(Figure2)

Metal, insulatedorlight weight factory reinforced doors:

l Drill 3/16" fastening holes. Secure the door bracket using the self-threading screws. (Figure3)

Wooddoors:

l Use top and bottom or side to side door bracketholes.Drill 5/16" holesthrough the door and

secure bracketwith 5/16"-18x2" carriage bolts,lock washersand 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

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 left and right, or the top and bottomholes.

Metal Doors:

l Drill 3/16" pilot holes and fasten the bracket with the self-threading screwsprovided.

WoodDoors:

l Drill 5/16" holes and use 5/16"-18x2" carriage bolts, lockwashers and nuts (not provided) or

5/16"x1-1/2" lag screws(notprovided) 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 instructionswhich apply to your door.

OPTION A SECTIONAL DOORS

IMPORTANT: The groove on the straightdoor arm MUST face away from the curved door arm.

1. Close the door. Disconnectthe trolley by pulling the emergency release handle.

2. Attach the straight door 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 clevispin.Secure with the ring

fastener.

4. Bring arm sectionstogether. Find two pairsof holes that line up and join sections. Select holes

as far apartaspossible to increase door arm rigidity 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.

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 MUST face away from the curved door arm.

1. Close the door. Disconnectthe trolley by pulling the emergency release handle.

2. Fasten the straight door armand the curved door arm together to the longestpossible length

(with a 2 or 3 hole overlap) using the bolts,nuts, and lockwashers.

3. Attach the straight door arm to the door bracket using 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 emergency release 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

Nut

Ring Fastener

Lock Washer

Clevis Pin 5/16"x1-1/4"

Clevis Pin

5/16"x1-1/4"

Hex Bolts

Clevis Pin

5/16"x1"

Clevis Pin

5/16"x1"

Straight Door Arm

(Groove facing out)

Curved Door Arm

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Chamberlain B503C Mode d'emploi

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