Chamberlain 8550 User manual

CONTENTS

Preparation. . . . . . . . . . . . . . . .2-3

Assembly . . . . . . . . . . . . . . . . .4-5

Installation . . . . . . . . . . . . . . .6-13

Install the Door Control. . . . . . 14-15

Install the Protector System®. . 16-19

Power. . . . . . . . . . . . . . . . . . 20-21

Adjustments . . . . . . . . . . . . . 22-24

Battery Backup*. . . . . . . . . . . 25-26

Operation . . . . . . . . . . . . . . . . . 27

Features . . . . . . . . . . . . . . . . . . 28

Door Control . . . . . . . . . . . . . 29-30

Remote Control . . . . . . . . . . . 31-32

To Erase the Memory . . . . . . . . . 32

To Open the Door Manually . . . . . 33

Maintenance . . . . . . . . . . . . . . . 34

Troubleshooting. . . . . . . . . . . 35-36

Accessories. . . . . . . . . . . . . . . . 37

Warranty. . . . . . . . . . . . . . . . . . 38

Repair Parts . . . . . . . . . . . . . 39-41

* If applicable

ELITE Series

Garage Door Opener

LiftMaster

845 Larch Avenue

Elmhurst, Illinois 60126-1196

■ 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.

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

www.LiftMaster.com for installation instructions.

www.LiftMaster.com

Serial Number:

Date of Purchase:

Models

• 8550 - DC Belt Drive

with Battery Backup

• 8557 - 3/4 hp

Belt Drive

FOR RESIDENTIAL USE ONLY

Write down the following information for

future reference:

Safety Symbol and Signal Word

Review

Thisgarage door opener hasbeen designed and

tested to offer safe service provided itis installed,

operated,maintained and tested in strict

accordance with the instructionsand warnings

contained in this manual.

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.

Mechanical

Electrical

When you see thisSignal 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

To prevent possible SERIOUSINJURYor

DEATH:

lALWAYS call a trained door systems

technician if garage door binds,sticks,

or isout ofbalance.An unbalanced

garage door may NOT reverse when

required.

lNEVER tryto 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ropesconnected 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 at

120V, 60Hzto avoid malfunction and

damage.

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. Ifyour 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 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 ofthe door. Ifthere 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 leftor right of

the door center.See page 7.

Torsion

Spring

Extension

Spring

Tools Needed

3/16

7/16

1/2

5/32

5/16

5/8

9/16

1/4

7/16

Preparation

Carton Inventory

Accessorieswill 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 notincluded in this manual. The images

throughout this manual are for reference and your product may look different.

A. Header bracket

B. Pulley and bracket

C. Door bracket

D. Curved door arm

E. Straight door arm

F. Trolley

G. Emergency release rope and handle

H. Rail

I. Garage door opener

J. Sprocket cover with hex screws

K. Belt

L. Door control

M. White and red/white wire

N. The Protector System®

Safety reversing sensorswith white and white/blackwire attached: Sending Sensor (1)

Receiving Sensor (1) and SafetySensor Brackets (2)

O. Safety labels and literature

P. Rail grease

Security+ 2.0™ Accessories

880LM

Smart Control Panel®

895MAX

Remote Control

Installation Hardware

Hex bolt 5/16"-18 x 7/8" (4) Lock washer 5/16" (4)

Lag screw 5/16"-9 x 1-5/8" (2) Self-threading screw1/4"-14 x 5/8" (2)

Clevis pin 5/16" x 2-3/4" (1) Ring fastener (3)

Clevis pin 5/16" x 1-1/4" (1) Carriage bolt 1/4"-20 x 1/2" (2)

Clevis pin 5/16" x1" (1) Wing nut 1/4"-20 (2)

Nut 5/16"-18 (4)

Door Control Hardware

Screw 6AB x 1" (2)

Screw 6-32 x 1" (2)

Drywall anchors (2)

Insulated staples

Not Provided

Not

Provided

Preparation

Assembly

1 Attach the Rail to the Garage Door Opener

To avoid possible SERIOUS INJURY to finger from moving garage door opener:

lALWAYS keep hand clear of sprocketwhile operating opener.

lSecurely attach sprocket cover BEFORE operating.

To avoid SERIOUS damage to garage door opener, use ONLY those bolts/fasteners mounted in

the top of the opener.

NOTE: ONLY use the boltsremoved from the garage door opener. Place the garage door opener on

the packing material to prevent scratching.

1. Model 8550: Remove the two boltsfrom the top of the garage door opener.

Model 8557:Remove boltand lock nut from the top ofthe garage door opener.

2. Align the rail and the styrofoam over the sprocket.Cut the tape from the rail, belt, and

styrofoam.

3. Model 8550: Fasten the rail with the previouslyremoved bolts.

Model 8557: Fasten the rail with the previouslyremoved washered boltand lock nut.

4. Position the beltaround the garage door opener sprocket.

5. Attach the sprocket cover over the garage door opener sprocket and attach with hex screws.

Model 8550

Model 8557

Washered Bolt

5/16"-18x1/2"

Hex Screw

#8x3/8"

Lock Nut

Washered Bolt 5/16"-18x1/2"

(Mounted in the garage

door opener)

Model 8550 (2)

Model 8557 (1)

Hex Screw

#8x3/8"

(Packed with the

sprocket cover)

Lock Nut

(Mounted in the

garage door opener)

Model 8557 (1)

Washered Bolt

5/16"-18x1/2"

Hex Screw

#8x3/8"

HARDWARE

Assembly

2 Tighten the Belt

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

trolley.Do not use any tools.

2. Insert a flathead screwdriver tip into one ofthe nut ring slotsand brace itfirmlyagainstthe

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 sets the

spring to optimum belt tension.

Spring Trolley Nut

(To motor unit)

Nut ring

slot

Nut Ring Nut Ring

AFTER RELEASE

1-1/4"

(3.18 cm)

BEFORE

(2.5 cm)

Installation

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 properlybalanced and lubricated garage door.An

improperly balanced door may NOT reverse when required and could resultin SEVERE

INJURY or DEATH.

3. ALL repairsto cables,spring assemblies and other hardware MUST be made by a trained

door systemstechnician BEFORE installing opener.

4. Disable ALL locks and remove ALL ropesconnected 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 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 caughtin garage door or opener mechanisms.

9. Install wall-mounted garage door control:

lwithin sight of the 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 next to garage door control.

11. Place manual release/safetyreverse testlabel in plain view on inside ofgarage door.

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

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

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

electric and battery power BEFORE performing ANY service or maintenance.

14. DO NOT enable the Timer-to-Close functionalityif 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

1 Determine the Header Bracket Location

To preventpossible SERIOUS INJURY or DEATH:

lHeader bracketMUST be RIGIDLY fastened to structural supporton header wall or ceiling,

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

over drywall.

lConcrete anchors MUST be used ifmounting 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 systemstechnician if garage door binds,sticks,or isout of

balance.An unbalanced garage door might NOT reverse when required.

lDO NOT enable the Timer-to-Close functionality if operating either one-piece or swinging

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

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

installation instructions.

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

Extend the line onto the header wall above the door. You can fasten the header bracketwithin 4 feet

(1.22 m) of the leftor right ofthe door center only ifa torsion spring or center bearing plate is in the way;

or you can attach itto the ceiling when clearance is minimal. (Itmaybe 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 (notprovided) to securelyfasten the 2x4 to structural supports.

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

header wall 2" (5 cm) above the high point.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 8 for ceiling installation.

Header Wall

Unfinished

Ceiling

Vertical Centerline

of Garage Door

2x4

Structural

Supports

Level

(Optional)

OPTIONAL

CEILING

MOUNT FOR

HEADER

BRACKET

Sectional door with curved track

Header Wall

Track

2" (5 cm)

Highest Point

of Travel

Door

Installation

2 Install the Header Bracket

You can attach the header bracket either to the wall above the garage door,or to the ceiling. Follow the

instructions which will work best for your particular requirements.Donot installthe headerbracket 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 bracket on the vertical centerline with the bottomedge of the bracket on the

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

2. Mark the vertical set ofbracket holes (do not use the holes designated for ceiling mount).Drill

3/16" pilot holes and fasten the bracket securely to a structural supportwith lag screws.

Wall Mount

Optional

Mounting

Holes

Vertical

Centerline of

Garage Door

(Header Wall)

Header

Bracket

2x4 Structural

Support

Door Spring

(Garage Door)

Highest Point of

Garage Door

Travel

Horizontal

Line

Lag Screw

5/16" - 9 x 1-5/8"

OPTION B CEILING INSTALLATION

1. Extend the vertical centerline onto the ceiling asshown.

2. Center the bracket on the vertical mark,no more than 6" (15 cm) from the wall.Make sure the

arrow is pointing toward the wall. The bracket can be mounted flush against the ceiling when

clearance is minimal.

3. Mark the side holes.Drill 3/16" pilot holes and fasten bracketsecurely to a structural support

with lag screws.

(Header Wall)

Ceiling Mounting Holes

(Finished Ceiling)

Vertical

Centerline of

Garage Door

Header

Bracket

6" (15 cm)

Maximum

Door Spring

(Garage Door)

Lag Screw

5/16" - 9 x 1-5/8"

Installation

3 Attach the Rail to the Header Bracket

1. Align the rail with the header bracket.Insertthe clevis pin through the holes in the header

bracket and rail. Secure with the ring fastener.

NOTE: Use the packing material as a protective base for the garage door opener.

Ring

Fastener

Clevis Pin

5/16" X 2-3/4"

HARDWARE

Clevis Pin 5/16" x 2-3/4" Ring Fastener

4 Position the Garage Door Opener

To preventdamage 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. Fullyopen the door and place a 2x4 (laid flat) under the rail.

A 2x4 isideal for setting the distance between the rail and the door.If the ladder is nottall enough you

will need help at this point.Ifthe door hits the trolley when it israised, 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

Installation

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 anchorsMUST be used ifinstalling ANY bracketsinto

masonry.

Hanging your garage door opener will varydepending on your garage.Two representative installations

are shown.Yours may be different.Hanging bracketsshould be angled (Figure 1) to provide rigid

support.On finished ceilings(Figure 2),attach a sturdy metal bracketto structural supportsbefore

installing the opener. This bracket and fastening hardware are not provided.

1. Measure the distance from each side of the motor unit to the structural support.

2. Cutboth pieces ofthe hanging bracket to required lengths.

3. Drill 3/16" pilot holes in the structural supports.

4. Attach one end of each bracketto a support with 5/16"-18x1-7/8" lag screws (notprovided).

5. Fasten the opener to the hanging bracketswith 5/16"-18x7/8" hex bolts,lock washers and

nuts.

6. Check to make sure the rail is centered over the door (or in line with the header bracket ifthe

bracket isnot centered above the door).

7. Remove the 2x4.Operate the door manually.Ifthe door hitsthe rail, raise the header bracket.

NOTE: DO NOT connect power to opener at this time.

FIGURE 1 FIGURE 2

(Not Provided)

Lag Screws

5/16"- 18x1-7/8"

Measure

Distance

Hex Bolt 5/16"- 18x7/8", Lock Washer 5/16", Nut 5/16"-18

FIGURE 3

Not Provided

Finished Ceiling

Unﬁnished Ceiling

Hex Bolt 5/16"- 18x7/8" Nut 5/16"-18Lock Washer 5/16"

HARDWARE

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