Chamberlain 8550 User manual

Serial Number:

Date of Purchase:

Belt Drive Garage Door Opener

The Chamberlain Group, Inc.

845 Larch Avenue

Elmhurst, Illinois 60126-1196

www.liftmaster.com

Write down the following information

for future reference:

NOTE: If you are installing the garage door opener on a one-piece door, visit

www.liftmaster.com for installation instructions.

Contents

Model 8550

FOR RESIDENTIAL USE ONLY

BELT DRIVE GARAGE DOOR OPENER.. 1

PREPARATION............................. 2

ASSEMBLY................................. 4

INSTALLATION ........................ 6-13

INSTALL THE DOOR CONTROL.....14-16

INSTALL THE

PROTECTOR SYSTEM®..............17-20

POWER ................................21-22

ADJUSTMENT.........................23-25

BATTERY BACKUP ...................26-27

OPERATION ...............................28

FEATURES.................................29

DOOR CONTROL .....................30-31

REMOTE CONTROLS.................32-33

TO ERASE THE MEMORY ...............33

TO OPEN THE DOOR MANUALLY ......34

MAINTENANCE ...........................34

TROUBLESHOOTING.................35-36

REPAIR PARTS .......................37-38

ACCESSORIES ............................39

WARRANTY ...............................40

■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 ONLY 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.

Safety Symbol and Signal

Word Review

This garage door opener has been designed and

tested to offer safe service provided it is installed,

operated, maintained and tested in strict

accordance with the instructions and warnings

contained in this manual.

When you see these Safety Symbols and Signal

Words on the following pages, they will alert you

to the possibility of serious injury or death if you

do not comply with the warnings that accompany

them. The hazard may come from something

mechanical or from electric shock. Read the

warnings carefully.

Mechanical

Electrical

When you see this Signal Word on the following

pages,it will alert you to the possibility of damage

to your garage door and/or the garage door

opener if you do not comply with the cautionary

statements that accompany it. Read them

carefully.

Check the Door

1. Disable locks and remove any ropes

connected to the garage door.

2. Lift the door halfway up. Release the

door. If balanced, it should stay in

place, supported entirely by its springs.

3. Raise and lower the door to check for

binding or sticking. If your door binds,

sticks, or is out of balance, call a trained

door systems technician.

4. Check the seal on the bottom of the

door. Any gap between the floor and

the bottom of the door must not exceed

1/4 inch (6 mm). Otherwise, the safety

reversal system may not work properly.

5. The opener should be installed above

the center of the door. If there is a

torsion spring or center bearing plate

in the way of the header bracket, it may

be installed within 4 feet (1.2 m) to the

left or right of the door center. See

installing the Header Bracket section.

Torsion Spring Extension Spring

To prevent possible SERIOUSINJURYor

DEATH:

• ALWAYS call a trained door systems

technician if garage door binds, sticks, or is

out of balance. An unbalanced garage

door may not reverse when required.

• NEVER try to loosen, move or adjust

garage door, door springs, cables, pulleys,

brackets or their hardware, ALLof which

are under EXTREMEtension.

• Disable ALLlocks and remove ALLropes

connected to garage door BEFORE

installation and operating garage door

opener to avoid entanglement.

To prevent damage to garage door and

opener:

• ALWAYS disable locks BEFORE installing

and operating the opener.

• ONLY operate garage door opener at

120 V, 60 Hz to avoid malfunction and

damage.

Tools Needed

3/16

7/16

1/2

5/32

5/16

5/8

9/16

1/4

7/16

Preparation

Overview/Carton Inventory

GARAGE DOOR OPENER ASSEMBLY

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B.Pulley and bracket

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G. Emergency release rope and handle

H.Rail

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NOTE: Accessories will vary depending on the garage door opener model purchased. Depending on your specific model, other accessories

may be included with your garage door opener. The instructions for these accessories will be attached to the accessory and are not included

in this manual. The images throughout this manuals are for reference and your product may look different.

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The Protector System®

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with white and white/black wire attached:

Sending Sensor (1) Receiving Sensor (1)

and Safety Sensor Brackets (2)

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Hardware

Assembly

H1 Hex Screw #8x3/8" (3)

[packed with the sprocket cover]

Installation

H2 Hex Bolt 5/16"-18 x 7/8" (4)

H3 Lag Screw 5/16"-9 x 1-5/8" (2)

H4 Lag Screw 5/16"-18 x 1-5/8" (2)

H5 Clevis Pin 5/16" x 2-3/4" (1)

H6 Clevis Pin 5/16" x 1-1/4" (1)

H7 Clevis Pin 5/16" x 1" (1)

H8 Nut 5/16"-18 (4)

H9 Lock Washer 5/16"-16 (4)

H10 Self-Threading Screw 1/4"-14 x 5/8" (2)

H11 Ring Fastener (3)

H12 Carriage Bolt 1/4"-20 x 1/2" (2)

H13 Wing Nut 1/4"-20 (2)

Door Control Hardware

H14 Screw 6AB x 1-1/4" (2)

H15 Screw 6-32 x 1" (2)

H16 Drywall Anchors (2)

H17 Insulated Staples (10)

895MAX

Remote Control

880LM

Smart Control

Panel®829LM

Garage Door

Monitor

MyQ™AND SECURITY✚®2.0

ACCESSORIES

To avoid possible SERIOUS INJURY to finger

from moving garage door opener:

• ALWAYS keep hand clear of sprocket while

operating opener.

• Securely attach sprocket cover BEFORE

operating.

To avoid SERIOUS damage to garage door

opener, use ONLY those bolts/fasteners

mounted in the top of the opener.

Mounted in the

garage door opener

HARDWARE

H1 (3)

Hex Screw

#8x3/8"

(Packed with the

sprocket cover)

NOTE: ONLY use the bolts removed from the

garage door opener.Place the garage door

opener on the packing material to prevent

scratching.

1.1 Remove the two bolts from the top of the

garage door opener.

1.2 Align the rail and the styrofoam over the

sprocket. Cut the tape from the rail, belt,

and styrofoam.

1.3 Fasten the rail with the previously removed

bolts.

1.4 Position the belt around the garage door

opener sprocket.

1.5 Attach the sprocket cover over the garage

door opener sprocket and attach with hex

screws (H1).

Assembly

1Attach the rail to the garage door opener

2Tighten the Belt

2.1 By hand, thread the spring trolley nut on the threaded shaft until it is finger tight against

the trolley. Do not use any tools.

Spring Trolley Nut

(To motor unit)

2.2 Insert a flathead screwdriver tip into one of the nut ring slots and brace it firmly against the trolley.

Nut ring

slot

2.3 Tighten the spring trolley nut with an adjustable wrench or a 7/16” open end wrench about a quarter turn until the spring releases and snaps the nut ring against the trolley. This sets the spring to

optimum belt tension.

Nut Ring Nut Ring

AFTER RELEASE

1-1/4"

(3.18 cm)

BEFORE

(2.5 cm)

IMPORTANT INSTALLATION INSTRUCTIONS

WARNING

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 least6 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:

• within sight of the garage door.

• out of reach of children at minimum height of 5 feet (1.5 m).

• away from ALL moving parts of the door.

10. Place entrapment warning label on wall next to garage door control

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

12. Upon completion of installation, test safety reversal system. Door MUST reverse on.contact with

a 1-1/2" (3.8 cm) high object (or a 2x4 laid fl at) on the floor.

13. To avoid SERIOUS PERSONAL INJURY or DEATH from electrocution, disconnectALL

electric and battery power BEFORE performing any service or maintenance.

14. DO NOT enable the Timer-to-Close functionality if operating either one-piece or swinging

garage doors. To be enabled ONLY when operating a sectional door.

NOTE:If you are installing the garage door opener on a one-piece door, visit www.liftmaster.com for installation instructions.

Installation

To prevent possible SERIOUS INJURY or

DEATH:

• Header 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.

• Concrete anchors MUST be used if

mounting header bracket or 2x4 into

masonry.

• NEVER try to loosen, move or adjust

garage door, springs, cables, pulleys,

brackets, or their hardware, ALL of which

are under EXTREME tension.

• ALWAYS call a trained door systems

technician if garage door binds, sticks, or is

out of balance. An unbalanced garage

door might NOT reverse when required.

• 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.

1Determine the header bracket location

NOTE: Ifyou are installing the garage door opener on a one-piece door, visit www.liftmaster.com for

installation instructions.

1.1 Close the door and mark the inside vertical centerline of the garage door.

1.2 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 when clearance is minimal. (It may be mounted on the wall upside down if

necessary, to gain approximately 1/2" (1 cm).

If you need to install the header bracket on a 2x4 (on wall or ceiling), use lag screws (not

provided) to securely fasten the 2x4 to structural supports.

1.3 Open your door to the highest point of travel as shown. Draw an intersecting horizontal line on

the header wall 2" (5 cm) above the high point.This height will provide travel clearance for the

top edge of the door.

NOTE: Ifthe total number of inches exceeds the height available in your garage, use the maximum

height possible, or refer to page 8 ceiling installation.

Sectional door with curved track

Header Wall

Track

2" (5 cm)

Highest Point

of Travel

Door

Header Wall

Unfinished Ceiling

Vertical Centerline

of Garage Door 2x4

2x4

Structural

Supports

Level

(Optional)

OPTIONAL

CEILING

MOUNT FOR

HEADER

BRACKET

You can attach the header bracket either to the

wall above the garage door, or to the ceiling.

Follow the instructions which will work best for

your particular requirements. Do not install the

header bracket over drywall. If installing into

masonry, use concrete anchors (not provided).

HARDWARE

H3 (2)

Lag Screw

5/16"-9x1-5/8"

OPTION A WALL INSTALLATION

2.1A Center the bracket on the vertical

centerline with the bottom edge of the

bracket on the horizontal line as shown

(with the arrow pointing toward the

ceiling).

2.2A Mark the vertical set of bracket holes (do

not use the holes designated for ceiling

mount). Drill 3/16" pilot holes and fasten

the bracket securely to a structural

support with the hardware provided (H3).

OPTION B CEILING INSTALLATION

2.1B Extend the vertical centerline onto the

ceiling as shown.

2.2B Center the bracket on 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 against the ceiling when

clearance is minimal.

2.3B Mark the side holes. Drill 3/16" pilot holes

and fasten bracket securely to a structural

support with the hardware provided (H3).

CEILING MOUNT ONLY

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

The nail hole is for positioning

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CEILING MOUNT ONLY

(Header Wall)

Ceiling Mounting Holes

(Finished Ceiling)

Vertical

Centerline of

Garage Door

Header

Bracket

6" (15 cm)

Maximum

Door Spring

(Garage Door)

The nail hole is for positioning

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Installation

2 Install the Header Bracket

3.1 Align the rail with the header bracket.

Insert the clevis pin (H5) through the

holes in the header bracket and rail.

Secure with the ring fastener (H11).

NOTE: Use the packing material as a

protective base for the garage door opener.

H11

HARDWARE

Clevis Pin

5/16"x2-3/4"

H11

Ring Fastener

4Position the garage door opener

To prevent damage to garage door, rest garage

door opener rail on 2x4 placed on top section of

door.

4.1 Remove the packing material and lift the

garage door opener onto a ladder.

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.

4.2 Fully open the door and place a 2x4 (laid flat) under the rail.

NOTE: Ifthe 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

3Attach the rail to the header bracket

To avoid possible SERIOUS INJURY from a

falling garage door opener, fasten it SECURELY to

structural supports of the garage. Concrete anchors MUST

be used if installing ANY brackets into masonry.

HARDWARE

H4 (2)

Lag Screw 5/16"- 18x1-5/8" H2 (2)

Hex Bolt 5/16"- 18x7/8"

H8 (2)

Nut 5/16"-18

H9 (2)

Lock Washer

5/16"-16

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.

Finished Ceiling

Unfinished Ceiling

5.1 On finished ceilings, use the lag screws

(H3) to attach a support bracket (not

provided) to the structural supports

before installing the garage door opener.

Finished

Ceiling

(not provided)

5.2 Make sure the garage door opener is

aligned with the header bracket. Measure

the distance from each side of the garage

door opener to the support bracket.

5.3 Cut both pieces of the hanging bracket to

required lengths.

5.4 Attach the end of each hanging bracket to

the support bracket with appropriate

hardware (not provided).

(not provided)

5.5 Attach the garage door opener to the

hanging brackets with the bolts (H2), lock

washers (H9) and nuts (H8).

5.6 Remove the 2x4 and manually close the

door. If the door hits the rail, raise the

header bracket.

Installation

5Hang the garage door opener

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