Liftmaster 1255 User Manual

Garage Door Opener

Owner's Manual

(Model Series 1200)

For Residential Use Only

The Chamberlain Group, Inc.

A DUCHOSSOIS ENTERPRISE

Complies with UL 325 Regulations effective January 1, 1993.

845 Larch Avenue

Elmhurst, Illinois 60126

Model 1260 - 1/2HP Model 1260-166 - 1/2HP Model 1260-266 - 1/2HP

Model 1250 - 1/3HP

Model 1250-266 - 1/3HP

Model 1255 - 1/2HP Model 1255-166 - 1/2HP Model 1255-266 - 1/2HP

Model 1245 - 1/3HP Model 1245-266 - 1/3HP

Model 1256 - 1/2HP Model 1246 - 1/3HP

Model 1240 - 1/4HP

Owner's Manual

■ 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

properly aligned

■ Periodic checks and adjustment of the opener are required to ensure safe

operation.

■ The model number label is located on the front panel of your opener.

is connected and

CONTENTS PAGE

A review of safety alert symbols.............................2

You'll need tools .....................................................3

Safety information regarding garage door locks

and ropes.............................................................3

Testing your garage door for sticking, binding

and balance.........................................................3

llustration of sectional door installation ..................4

Illustration of one-piece door installation................5

Carton inventory.....................................................6

Hardware inventory ................................................7

Assembly Section - Pages 8 – 11

Fasten T-rail to opener.....................................8, 9

Attach chain to sprocket, install sprocket cover....8

Attach chain spreader, re-install chain ...............10

Tighten the chain................................................11

Installation Section - Pages 11 – 27

Installation safety instructions.............................11

Determine header bracket location

Sectional door...................................................12

One-piece door.................................................13

Install header bracket.........................................14

Attach the T-rail to header bracket.....................15

Position the opener.............................................16

Hang the opener.................................................17

Install the door control........................................18

Install the light(s) and lens(es)............................19

CONTENTS PAGE

Attach manual release rope and handle.............19

Electrical requirements ........................................20

Safety reversing sensor information ....................21

Install the safety reversing sensor .................22, 23

Fasten door bracket (sectional door)...................24

Fasten door bracket (one-piece door)..................25

Connect door arm to trolley (sectional door)........26

Connect door arm to trolley (one-piece door) 27

Adjustment Section - Pages 28 – 30

Travel limit adjustments.......................................28

Force adjustments ...............................................29

Test the safety reversing sensor..........................30

Test the safety reverse system ...........................30

Operation safety instructions .................................31

Care of your opener...............................................31

Maintenance schedule...........................................31

Operation of your opener.......................................32

Receiver and remote control programming............33

Having a problem?...........................................34, 35

Repair parts, rail assembly ....................................36

Repair parts, installation ........................................36

Repair parts, opener assembly..............................37

Accessories............................................................38

Index......................................................................39

How to order repair parts.......................................40

Maintenance agreement........................................40

Warranty ................................................................40

Start by reviewing these important safety alert symbols

When you see these safety symbols on the following pages, they will alert you to the possibility of

serious injuries or death

come from something mechanical or from electric shock.

WARNING

if you do not comply with the corresponding instructions. The hazard may

Read the instructions carefully.

WARNING

Mechanical Electrical

When you see this safety symbol 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 corresponding instructions.

Read the instructions carefully.

CAUTION

This garage door opener is designed and tested to offer safe service provided it is installed, operated, maintained and tested in strict accordance with the safety instructions contained in this manual.

You'll Need Tools

During assembly , installation and ad justment of t he opener, instructions will call for hand tools shown below.

Pencil

Carpenter's

Level

Tape Measure

Hack Saw

Wire Cutters

Stepladder

Drill

1/2" and 7/16" Sockets

and Wrench

3/16", 5/16" and

5/32" Drill Bits

WARNING

An unbalanced garage door might not reverse when required and someone under the door could be seriously injured or killed.

If your garage door binds, sticks or is out of balance, call for professional garage door service.

pulleys, brackets and their hardware, are under extreme tension and can cause serious injury or death.

adjust them yourself!

Ropes left on a garage door could cause someone to become entangled and killed.

Remove all ropes connected to the door before installing and operating the opener.

Identify the type and height of your door and any special conditions that exist and any additional materials that may be required by referring to the lists on page 4 or page 5.

Garage doors, door springs, cables,

Do not try to loosen, move or

Claw Hammer

Pliers

Screwdriver

Adjustable End Wrench

CAUTION

To avoid damage to the garage door and opener, disable locks before installing and operating the opener. Use a wood screw or nail to hold locks in the "open" (unlocked) position.

Operation at other than 120V 60 Hz will cause opener malfunction and damage.

Before you begin, complete the following test to make sure your door is balanced, and is not sticking or binding:

• Lift the door about halfway as shown. Release the door. It should stay in place, supported entirely by its springs.

• Raise and lower the door to see if there is any binding or sticking.

SECTIONAL DOOR

ONE-PIECE DOOR

Sectional Door Installation

Before you begin, survey your garage area to see whether any of the conditions below apply to your installation.

FINISHED CEILING

Support bracket &

fastening hardware

Horizontal and vertical reinforcement

is needed for lightweight garage doors

(fiberglass, steel, aluminum,

door with glass panels, etc.).

See page 20 for details.

Header Wall

— — — — — — — —

Door

Center

Slack in chain tension

is normal when

garage door is closed.

Extension Spring

Torsion Spring

is required.

See page 13.

Access Door

Floor must be level

Safety

Reversing

Sensor

across width of door

Based on your particular requirements, there are several installation steps which might call for materials and/or hardware not included in the carton.

• Step 1, page 12 - Look at the wall or ceiling above the garage door. The header bracket

must

securely fastened to structural supports.

• Step 5, page 17 - Do you have a finished ceiling in your garage? If so, a support bracket and additional fastening hardware may be required.

• Safety reversing sensor, page 21 - Depending upon garage construction, wood blocks may need to be fastened to mounting locations before sensors are installed.

• Step 10, page 22 - Alternate floor mounting of the safety reversing sensor will require hardware not provided.

• Step 11, page 24 - Do you have a steel, aluminum, fiberglass or glass panel door? If so, horizontal and vertical reinforcement is required.

• Look at the garage door where it meets the floor. It must close on the floor all the way across. Otherwise, the safety reverse system may not work properly. See page 30. Floor or door should be repaired.

• If your door is more than 7 feet high, see longer rails available on page 38.

Safety

Reversing

Sensor

Closed Position

Trolley

Straight

Door

Arm

Curved

Door Arm

Rope & Handle

Chain

Manual

Release

Header

Wall

Garage

Door

Header Bracket

Garage

Door Bracket

Chain Pulley

Bracket

Door

Spring

• The opener can be installed within 2 feet to the left or right of the door center if there is a torsion spring or center bearing plate in the way of the header bracket or door bracket area. If your door has extension springs, the opener

must

be installed

in the center of the door. See pages 12 and 24.

• Do you have an access door in addition to the garage door? If not, Model 1702 Outside Quick Release is required. See page 38.

You may find it helpful to refer back to this page as you proceed with the installation of your opener.

One-Piece Door Installation

Before you begin, survey your garage area to see whether any of the conditions below apply to your installation.

Slack in chain tension

is normal when

garage door is closed.

Header

Wall

One-Piece Door without Track

FINISHED CEILING

Support bracket

& fastening

hardware is required.

See page 17.

Access Door

Safety Reversing Sensor

Gap between floor and bottom of

Safety

Reversing

Sensor

door must not exceed 1/4".

Based on your particular requirements, there are several installation steps which might call for materials and/or hardware not included in the carton.

• Step 1, page 12 - Look at the wall or ceiling above the garage door. The header bracket

must

securely fastened to structural supports.

• Step 5, page 17 - Do you have a finished ceiling in your garage? If so, a support bracket and additional fastening hardware (not supplied) may be required

• Safety reversing sensor, page 21 - Depending on garage construction, wood blocks may need to be securely fastened to mounting locations before sensors are installed.

• Step 10, page 22 - Alternate floor mounting of the safety reversing sensor will require hardware that is not provided.

• Step 11, page 25 - Generally, a one-piece door does not require reinforcement. If your door is lightweight, you can refer to the information relating to sectional doors on page 24.

• Step 11, page 25 - Depending on your door's construction, you might need additional mounting hardware for the door bracket.

• Do you have an access door in addition to the garage door? If not, Model 1702 Outside Quick Release is required. See page 38.

• The gap between the bottom of the garage door and the floor cannot exceed 1/4". Otherwise, the safety reverse system may not work properly. See page 30. The floor or the door should be repaired.

Closed Position

Chain

Header

Wall

Pulley Bracket

Header Bracket

Door

Bracket

Garage

Door

T-rail

Straight

Door

Arm

Curved

Door

Arm

Trolley

Rope & Handle

Manual

Release

One-Piece Door with Track

Slack in Chain Tension

is Normal When

Garage Door is Closed

Access

Door

Safety

Reversing

Sensor

Floor must be level

across width of door

Closed Position

Header

Wall

Door

Chain Pulley

Bracket

Header Bracket

Door

Bracket

Chain

Curved

Door Arm

Straight

Door Arm

You may find it helpful to refer back to this page as you proceed with the installation of your opener.

Reversing

Sensor

Trolley

T-rail

Manual Release

Rope & Handle

Opener Carton Inventory

Your garage door opener is packaged in two cartons which contain all parts illustrated below. If anything is missing, carefully check the packing material. Parts may be "stuck" in the foam. Hardware for installation is shown on page 7.

(Models 1260, 1260-266,

1260-166, 1250 &1250-266)

LOCK

LIGHT

Multi-Function Door

Control Panel

(Models 1260, 1260-266,

1260-166, 1250 & 1250-266)

Light Lens (2)

(Models 1256, 1255, 1255-266,

1255-166, 1246, 1245, & 1245-266)

Light Lens (1)

(Models 1256, 1255, 1255-266,

1255-166, 1246, 1245, 1245-266, & 1240)

Lighted Door Control Button

w/6ABx1-1/2" screws

(Models 1260-266, 1260-166, 1255-266,

1255-166, 1250-266 & 1245-266 only)

Keyless Entry

Trolley

(Models 1260-266 &

1255-266 (2)

All Other Models (1))

Remote Control

Transmitter

with 12V battery

Remote Control

Transmitter Visor Clip

One-Piece

T-rail

(All Models except

1256 & 1246)

Sprocket Cover

Styrofoam

Chain

(Models 1256 & 1246 only)

Chain Spreader with

Screws and Washers

CEILING MOUNT ONLY

Header Bracket

Safety Reversing Sensor

Mounting Bracket

With Square Holes (2)

Safety Reversing Sensor

Mounting Bracket

With Slot (2)

Chain

Pulley Bracket

2-Conductor Bell Wire

White & White/Red

"C" Wrap (2)

Safety Reversing Sensor (2)

(1) Sending Eye

(1) Receiving Eye

2 Conductor Bell Wire with Connector

White & White/Black (2 rolls)

Door Bracket Plate

Door Bracket

Curved Door

Arm Section

Safety Labels

Literature

and

Straight Door

Arm Section

Group all hardware found in all packages contained in the opener carton into the two kits illustrated below.

Installation Hardware Kit # 41A2770

RAIL GREASE

NO. 83A4

Hex Screw

5/16"-18x7/8" (4)

Nut 5/16"-18 (6)

Lock Washer 5/16" (6)

Rail Grease

Lag Screw

5/16"-18 x1-7/8" (4)

Carriage Bolt

5/16"-18x2-1/2" (2)

Clevis Pin

5/16"x2-3/4" (1)

Screw

6ABx1" (2)

Insulated Staples (10)

Handle

Clevis Pin

5/16"x1" (2)

Safety Reversing Sensor

Installation Hardware Kit #41A4116

NOTICE

Ring Fastener (3)

Dry Wall Anchors (2)

Rope

Lag Screw

1/4x1-1/2" (4)

Hex Screw

1/4-20x1-1/2" (2)

Carriage Bolts

1/4"-20x1/2" (4)

Screw

#10-32 x3/8" (4)

Lock Nut

1/4"-20 (4)

Lock Nut

#10x32 (4)

Wing Nut (2)

Insulated

Staples (20)

Assembly Step 1

Attach the T-rail to the Opener

For Models 1260, 1260-266, 1255,1255-266, 1250, 1250-266, 1245, 1245-266 and 1240

See page 9 for Models 1256 and 1246.

• Remove the two washered screws mounted in top of opener

• Align T-rail at an angle with opener so one hole in T-rail and opener line up.

• Thread one of the washered screws part way in.

Use only these screws!

will cause serious damage to door opener.

• Align T-rail and styrofoam over opener sprocket. Cut tape from T-rail, chain and styrofoam.

• REMOVE STYROFOAM.

Use of any other screws

CAUTION

To fasten rail, use only those screws mounted in top of the opener. Any other screws will cause serious damage to the opener.

USE ONLY THIS TYPE AND SIZE

SCREW

Chain

Washered Screw

5/16"-18x1/2"

Styrofoam

T-rail

Hole

Assembly Step 2

Attach Chain to Sprocket and Install Sprocket Cover

For Models 1260, 1260-266, 1255,1255-266, 1250, 1250-266, 1245, 1245-266 and 1240

• Position chain over the opener sprocket. If necessary, loosen the outer nut on the trolley to obtain more chain slack.

• Insert the second washered screw.

CAUTION: Use only the screw previously removed from opener!

• Tighten both screws securely through the T-rail into the opener as shown.

Install the sprocket cover:

• Insert the back tab in the opener slot. Squeeze the cover slightly and insert the front tab in the slot on the mounting plate.

Sprocket

Cover

Back Tab Slot

Top of Opener

WARNING

Serious injury can result if fingers become entangled in moving opener sprocket. Attach sprocket cover securely. Never operate opener while your hand is near the opener sprocket.

USE ONLY THIS TYPE AND SIZE 

SCREW

Washered Screw

5/16"-18x1/2"

Opener

Sprocket

Front Tab Slot

Mounting

Plate

Proceed to Assembly Step 3, page 11.

Assembly Step 1

Attach the T-rail to the Opener

For Models 1256 and 1246 only

CAUTION

To fasten rail, use only those screws mounted in the top of the opener. Any other screws will cause serious damage to the opener.

• Place the opener on packing material to protect

the cover.

• Remove the (2) 5/16"-18x1/2" washered screws mounted in the top of the opener.

• Align T-rail and styrofoam over opener sprocket.

T-rail

Chain

Styrofoam

Packaging

USE ONLY THIS

TYPE AND SIZE

SCREW

Washered

Screws

5/16"-18x1/2"

Opener

Sprocket

• Cut tape from T-rail, chain and styrofoam. Remove styrofoam and pull the chain back (away from mounting plate)

• Fasten the rail with the (2) washered screws previously removed. Tighten securely.

Remember to use only these screws!

Any other

screws will cause serious damage to the opener.

USE ONLY THIS

TYPE AND SIZE

SCREW

Chain

T-rail

Styrofoam

Packaging

Washered Screws

5/16"-18x1/2"

Mounting

Plate

Opener

Chassis

Assembly Step 2

Attach the Chain Spreader and Re-install the Chain

For Models 1256 and 1246 only

WARNING

Serious injury can result if fingers become entangled in moving opener sprocket. Attach sprocket cover securely. Never operate opener while your hand is near the opener sprocket.

• Line up the holes in the chain spreader with the holes in the opener as shown. The slot in the chain spreader must fit over the T-rail flange.

• Securely fasten the chain spreader with the hardware provided.

• Remove the trolley threaded shaft from the trolley by loosening the inner nut and lock washer.

USE ONLY

THIS TYPE

AND SIZE

SCREW

Trolley

Hex Screw

T-rail

Flange

Outer

Nut

#8x1"

Slot

and Washer

Inner Nut

Washers

Chain

Spreader

Trolley

Threaded

Shaft

T-rail

• Guide the chain around the selected groove in the chain spreader (to engage either the 8-tooth sprocket or the 6-tooth sprocket) as shown.

• Continue dispensing the chain forward to the trolley. Reconnect the trolley to the trolley threaded shaft. Proceed to page 11 for chain tightening instructions.

Spreader

Chain

Spreader

Chain

Spreader

8-Tooth

Sprocket

Opener

Mounting Plate

6-Tooth

Sprocket

Opener

Mounting Plate

Install Chain

In This Direction

Opener

Sprocket

Assembly Step 3

Tighten the Chain

(All Models)

• Spin the inner nut and lock washer down the threaded shaft, away from the trolley.

• To tighten the chain, turn outer nut in the direction shown. As you turn the nut, keep the chain

from twisting.

• When the chain is approximately 1/2" above the base of the T-rail at its midpoint, re-tighten the inner nut to secure the adjustment.

Sprocket noise can result if chain is either too loose or too tight.

When installation is complete, you may notice some chain droop with the door closed. This is normal. If the chain returns to the position shown when the door is open,

NOTE: During future maintenance, pull the manual release handle to disconnect trolley before adjusting chain.

do not re-adjust the chain.

ALWAYS

Outer Nut

To Tighten Outer Nut

Trolley

Chain

Base of T-rail

Lock

Washer

Inner Nut

To Tighten

Inner Nut

1/2"

You have now finished assembling your garage door opener. Please read the following warnings before proceeding to the installation section.

IMPORTANT INSTALLATION INSTRUCTIONS

WARNING

To reduce the risk of severe injury or death to persons:

1. READ AND FOLLOW ALL INSTALLATION INSTRUCTIONS

2. Install only on a properly balanced and lubricated garage door.

could result in severe injury or death.

must be made by a professional service person before installing opener.

3. Disable all locks and remove all ropes connected to the garage door before installing the opener.

Repairs to cables, spring assemblies and other hardware

Ropes connected to a garage door can cause entanglement and death.

4. If possible, install door opener 7 feet or more above floor with the manual release handle mounted 6 feet above the floor.

5. Do not connect the opener to power source until instructed to do so.

6. Locate the Door Control within sight of the door at a minimum height of 5 feet where small children cannot reach and away from all moving parts of the door.

An improperly balanced door

7. Install the User Safety Instruction Label on the wall adjacent to the control button and the Maintenance Instruction Label in a prominent location on the inside of the garage door.

8. Upon completion of the installation, the door must reverse when it comes in contact with a one-inch high object (or a 2x4 laid flat) on the floor.

9. Do not wear watches, rings or loose clothing while installing or servicing an opener. Jewelry or loose clothing can be caught in the mechanism of the garage door or the opener.

Vertical

Guideline

Finished

Ceiling

Vertical

Guideline

Header

Wall

2x4

Structural

Supports

Installation Section: Pages 12 – 27

Installation Step 1

Determine Header Bracket Location

Installation procedures vary according to garage door types. Follow the instructions which apply to your door.

SECTIONAL Doors and

ONE-PIECE Door With Track

WARNING

If the header bracket is not rigidly fastened to a structural support on the header wall or ceiling, the safety reverse system may not work properly (see page 30).

not reverse when required, and could cause serious injury or death.

The garage door springs, cables, pulleys, brackets and their hardware are under extreme tension.

Do not attempt to loosen, move or adjust them yourself. Serious personal injury or death could result.

service.

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

• Extend the line onto the header wall above the door.

Remember, you can fasten the header bracket within 2 feet to the left or right of the door center a torsion spring or center bearing plate is in the way; or you can attach it to the ceiling (refer to page 14) when clearance is minimal.

If you need to install the header bracket on a 2x4 (on wall or ceiling), use lag screws (not supplied) to securely fasten the 2x4 to structural supports as shown here and on page 13.

The door might

Call for garage door

only

• Open your door to the highest point of travel as shown. Draw an intersecting horizontal line on the header wall 2" above the high point. This height will provide travel clearance for the top edge of the door.

Proceed to Step 2, page 14.

Door

Sectional door with

curved track

Ceiling

Header

Wall

Highest Point

of Travel

Track

Header

Wall

Highest Point

Door

One-piece door with

horizontal track

of Travel

Track

+ 28 hidden pages