Chamberlain 1256R, 1255R, 1246R, 1245R, 1240R Owner’s Manual

CHAMBERLAIN ®

LiftM

I'] i;IKo] [o] I_mi'±_l I •

The Chamberlain Group, Inc. 845 Larch Avenue

EImhurst, Illinois 60126-1196

www.liftmaster.com

0( us

GARAGE

DOOR OPENER

Model Series 1200

For Residential Use Only

Q ®

LiftMaster

Model 1256R- I/2HP Model 1246R- I/3HP

_00000_

]

Model 1255R - I/2HP Model 1245R - I/3HP

Model 1240R - 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 ®is connected and

properly aligned.

• Periodic checks of the opener are required to ensure safe operation.

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

TABLE OF CONTENTS

Introduction 2- 7

Safety symbol and signal word review ........................ 2

Preparing your garage door ........................................ 3

Tools needed ............................................................... 3

Planning .................................................................. 4-5

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

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

Assembly 8-11

Fasten the rail to the motor unit .............................. 8, 9

Install the chain and the sprocket cover ..................... 8

Install the chain spreader and the chain ................... 10

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

Installation 11-27

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

Determine the header bracket location ................ 12-13

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

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

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

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

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

Install the light and lens ............................................ 19

Attach the emergency release rope and handle ....... 19

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

Install the Protector System R_................................ 21-23

Fasten the door bracket ....................................... 24-25

Connect the door arm to the trolley ..................... 26-27

Adjustment 28-30

Adjust the travel limits ............................................... 28

Adjust the force ......................................................... 29

Test the safety reversal system ................................. 30

Test the Protector System R_........................................ 30

Operation 31-34

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

Using your garage door opener ................................ 31

Using the wall-mounted door control ........................ 32

To open the door manually ........................................ 32

Care of your garage door opener .............................. 33

Having a problem? .................................................... 34

Programming 35-36

To add or reprogram a hand-held remote control .....35

To erase all codes ..................................................... 35

3-Button remotes ....................................................... 35

To add, reprogram or change

a Keyless Entry PIN .................................................. 36

Repair Parts 3 7-38

Rail assembly parts ................................................... 37

Installation parts ........................................................ 37

Motor unit assembly parts ......................................... 38

Accessories 39 Repair Parts and Service

Warranty

40 40

INTRODUCTION

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

Mechanical

Electrical

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.

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.

Preparing your garage door

Before you begin:

• Disable locks.

• Remove any ropes connected to garage door.

• Complete the following test to make sure your garage door is balanced and is not sticking or

binding:

1. Lift the door about halfway as shown. Release the door. If balanced, it should stay in place,

supported entirely by its springs.

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

If your door binds, sticks, or is out of balance, call a trained door systems technician.

Toprevent possible SERIOUSINJURYORDEATH:

• ALWAYScall a trained door systems technician if garagedoor binds,sticks, or is out of balance.An unbalancedgaragedoor may not reversewhen required.

• NEVERtry to loosen,move or adjust garagedoor, door springs, cables,pulleys, brackets or their hardware,all

of which areunder EXTREMEtension.

• DisableALL locks and removeALL ropes connected to garagedoor BEFOREinstalling and operating garage door opener to avoidentanglement.

Toprevent damage to garagedoor and opener:

• ALWAYSdisable locks BEFOREinstalling and operating the opener.

• ONLYoperategaragedoor opener at 120V,60 Hzto avoid malfunction and damage.

Sectional Door

One-Piece Door

Level (Optional)

Drill 3/16", 5/16" and _,,_

Tape Measure

5/32" Drill Bits

Tools needed

During assembly, installation and adjustment of the

opener, instructions will call for hand tools as

illustrated below.

Pencil

Hack Saw

Wire Cutters

Claw Hammer

iers

Stepladder

ts Screwdriver

Adjustable End Wrench

Planning

Identify the type and height of your garage door. Survey your garage area to see if any of the

conditions below apply to your installation. Additional materials may be required. You may find it helpful to

refer back to this page and the accompanying illustrations as you proceed with the installation of

your opener. Depending on your requirements, there are several

installation steps which may call for materials or hardware not included in the carton.

• Installation Step 1 - Look at the wall or ceiling above the garage door. The header bracket must be securely fastened to structural supports.

• Installation Step 5 - Do you have a finished ceiling in your garage? If so, a support bracket and

additional fastening hardware may be required.

• Installation Step 10 - Depending upon garage construction, extension brackets or wood blocks

may be needed to install sensors.

• Installation Step 10 -Alternate floor mounting of the safety reversing sensor will require hardware

not provided.

Do you have an access door in addition to the garage door? If not, Model 1702 Outside Quick

Release is required. See Accessories page.

Look at the garage door where it meets the floor. Any gap between the floor and the bottom of the

door must not exceed 1/4" (6 mm). Otherwise, the safety reversal system may not work properly. See

Adjustment Step 3. Floor or door should be repaired.

SECTIONAL DOOR INSTALLATIONS

• Do you have a steel, aluminum, fiberglass or glass panel door? If so, horizontal and vertical reinforce-

ment is required (Installation Step 11)

• 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 (122 m) to the left or

right of the door center See Installation Steps 1 and 11

• If your door is more than 7 feet (2,13 m) high, see rail extension kits listed on Accessories page

SECTIONAL DOOR INSTALLATION

Horizontal and vertical reinforcement is needed for lightweight garage doors

(fiberglass, steel, aluminum, door with glass panels, etc.). See page 24 for details.

Header Wall

Centerline of

Garage Door

Torsion

j Spring

FINISHED CEILING

Support bracket & fastening hardware

is required.

Slack in chain tension See page 17. is normal when garage door is closed

Extension

OR Spring

Wall- mounted

Door Control

Access

Door

Header Bracket Chain Pulley

Bracket

Motor unit

y Trolley

Safety Reversing Sensor

Gap between floor and bottom of door must

not exceed 1/4" (6 mm)

Safety Reversing

Sensor

Door Bracket

Emergency Release

Rope & Handle

Arm

Planning (Continued)

ONE-PIECE DOOR INSTALLATIONS

• Generally, a one-piece door does not require reinforcement If your door is lightweight, refer to

the information relating to sectional doors in

Installation Step 11

• Depending on your door's construction, you may need additional mounting hardware for the door

bracket (Step 11)

ONE-PIECE DOOR WITHOUT TRACK

Slack in chain tension is normal when

Header

garage door is closed.

Without a properly working safety reversal system, persons (particularly small children) could be SERIOUSLYINJUREDor KILLEDby a closing garage

door.

• The gap betweenthe bottom of the garage door and

• The floor or the garage door MUST be repairedto

FINISHED CEILING

Support bracket & fastening hardware is required. See page 17.

the floor MUSTNOTexceed1/4" (6 mm). Otherwise, the safety reversal system may not work properly.

eliminate the gap.

Motor Unit

Chain

Pulley Bracket Trolley

CLOSED POSITION

Safety Reversing

_ _ Gap between floor

Safety Reversing not exceed 1/4" (6 mm) Sensor

and bottom of door must

Sensor

Garage Door

ONE-PIECE DOOR WITH TRACK I

E CLOSED POSiTiON

Chain Trolley

Curv ...............

Pulley Bracket Chain ]_

_c k;to c::oo_ A/,!o _: ) j _ Rat,

/_// Bracket !!o? ht E/ergency Release

/--i_l__ _ - \ Safety. i__--[ Gap between floor and Sensor

_ Heverstng --

Safety bottom of door must not Reversing exceed 1/4" (6 mm) I

Sensor j

Straight Door Door Arm Arm

Rope & Handle

Emergency

Rope

& Handle

Carton Inventory

Your garage door opener is packaged in two cartons which contain the motor unit and all parts illustrated

below. Note that accessories will depend on the model purchased. If anything is missing, carefully

check the packing material. Parts may be stuck in

SECURITY÷ ®

Lighted Door Control Button w/6ABx 1-1/2" screws

Models 1256R, 1255R,

1246R, & 1245R

Light Lens (1)

Single-Button Remote Control (1)

2-Conductor Bell Wire White & White/Red

the foam. Hardware for assembly and installation is shown on the next page. Save the carton and

packing material until installation and adjustment is complete.

All Models except 1256R & 1246R

Sprocket Cover Styrofoam

Chain

Remote Control

Transmitter Visor Clip

Models 1256R & 1246R only

One-Piece Rail

Chain Spreader with Screws and Washers

Header Bracket

Safety Sensor Bracket (2)

Chain Pulley Bracket

Safety Labels and

Literature

Door Bracket

Trolley

Curved Door Arm Section

ersing Sensors

e and 1 Receiving Eye)

Bell Wire attached

tor White & White/Black

Straight Door Arm Section

@ o

@ @

@ o

o @

@ Q

Hardware Inventory

Separate all hardware and group as shown below for the assembly and installation procedures.

INSTALLATION HARDWARE

Lag Screw 5/16"-9 xl-5/8" (2)

_h Lag Screw

5/16"-18xl-7/8" (2)

Self-Threading Screw 1/4"-14x5/8" (2)

Dry Wall Anchors (2)

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

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

Handle

Carriage Bolts 1/4"-20x 1/2" (2)

Clevis Pin 5/16"xl" (1)

Lock Washer 5/16" (4) Rail Grease

Nut 5/16"-18 (4)

Wing Nut 1/4"-20 (2)

oi{

Ring Fastener (3)

Staples (30)

°U

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

Rope

ASSEMBLY STEP 1

Fasten the Rail to the Motor Unit

MODELS 1255R 1245R, and 1240R (For Models 1256R and 1246R see page 9)

Toavoid SERIOUSdamageto garagedoor opener, use ONLYthose bolts/fasteners mounted in the top of

the opener.

• Remove the two washered bolts mounted in top of motor unit.

• Position rail at an angle to opener so one hole in rail and motor unit line up.

• Thread one of the washered bolts part way in.

Use only these bolts! Use of any other bolts will cause serious damage to door opener.

• Align rail and styrofoam over sprocket. Cut tape

from rail, chain and styrofoam.

• REMOVE STYROFOAM.

ASSEMBLY STEP 2

Attach the Chain to the Sprocket and Install the Sprocket Cover

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

Styrofoam

Washered Bolt Motor Unit

5/16"-18xl/2 ........ _ Sprocket

MODELS 1255R 1245R, and 1240R

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

chain slack.

• Insert the second washered bolt. CAUTION: Use

only the bolt previously removed from motor

unit!

• Tighten both screws securely through the rail into

the motor unit as shown.

• Install the sprocket cover: Insert the back tab in the

slot. Squeeze the cover slightly and insert the front tab in the slot on the mounting plate.

Proceed to Assembly Step 3. Front Tab Slot

Sprocket Cover

Back Tab Slot

Mounting ¢,,_. Plate zZ

/. j

ASSEMBLY STEP 1

Fasten the Rail to the Motor Unit

MODELS 1256R and 1246R ONLY

• Remove the two washered bolts mounted in top of

motor unit.

• Align rail and styrofoam over sprocket.

• Cut tape from rail, chain and styrofoam. Remove styrofoam and pull the chain back (away from the

mounting plate).

• Fasten the rail with the two washered bolts previously removed. Tighten securely.

Use only these bolts! Use of any other bolts will cause serious damage to door opener.

Toavoid SERIOUSdamageto garagedoor opener, use ONLYthose bolts/fasteners mounted in the top of the opener.

Motor Unit

Sprocket

Washered Bolts 5/16"-18xl/2"

USE ONLY THIS Plate

TYPE AND SIZE /

BOLT i

Styrofoam Packaging

Mounting

ASSEMBLY STEP 2

Attach the Chain Spreader and Re-install the Chain

MODELS 1256R AND 1246R ONLY

• Line up the holes in the chain spreader with the

holes in the motor unit as shown, The slot in the chain spreader must fit over the Rail flange

(Figure 1).

• 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

(Figure 2).

• 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 (Figure 3).

• Continue dispensing the chain forward to the

trolley (Figure 4). Reconnect the trolley to the trolley threaded shaft, Proceed to Assembly

Step 3 for chain tightening instructions.

Toavoid possible SERIOUSINJURYto fingers from moving garage door opener:

• ALWAYSkeephand clear of sprocket while operating opener.

• Securely attachsprocket cover BEFOREoperating.

#8xl" _--_

Hex Screw _i

_._ Washers

Slot

Rail Flange

Spreader Chain

Figure 1

Figure 2

Outer Inner Nut Trolley Nut and Washer Threaded Shaft

Chain Spreader 8-Tooth

___-- _ing Plate

Chain Spreader 6-Tooth

-- ,-___ Motor Unit

_if Iv "_ o°_U_ng Plate

Figure 3

_. Install Chain

Chain _ P

._ in This Direction

Sprocket

Motor Unit

Sprocket

cket

ASSEMBLY STEP 5

Tighten the Chain

ALL MODELS

• Spin the inner nut and lock washer down the

trolley 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" (13 mm) above the base of the 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.

NOTE: 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, do not re-adjust the chain.

NOTE: During future maintenance, ALWAYS pull the emergency release handle to disconnect trolley

before adjusting chain.

Chain

Base of Rail

Outer Nut Washer

Mid Length of Rail

Lock

1/2" (13 mm)

[

You have now finished assembfing your garage

door opener. Please read the following warnings before proceeding to the installation section.

INSTALLATION

IMPORTANT INSTALLATION INSTRUCTIONS

To reduce the risk of SEVERE INJURY or DEATH:

1. READAND FOLLOWALL INSTALLATIONWARNINGS AND INSTRUCTIONS.

2. Install garage door openeronly on properly balanced and lubricated garage door.An improperly balanced door maynot reversewhen requiredand could result in

SEVEREINJURYor DEATH.

3. All repairsto cables,spring assembliesand other

hardwareMUST be made by a trained door systems

technician BEFOREinstalling opener.

4. Disableall locks and removeall ropesconnectedto garage door BEFOREinstalling opener to avoid entanglement.

5. Install garage door opener7 feet (2.13 m) or more abovefloor.

6. Mount emergencyrelease handle6 feet (1.83 m) above floor.

7. NEVERconnect garagedoor opener to power source

until instructed to do so.

8. NEVERwearwatches, rings or loose clothing while installing or servicing opener.Theycould be caught in

garage door or opener mechanisms.

9. Install wall-mounted garagedoor control:

• within sight of the garagedoor.

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

• away from all moving parts of the door.

10. Placeentrapmentwarning label on wall next to garage door control.

11. Placemanual release/safetyreversetest label in plain view on inside of garagedoor.

12. Upon completion of installation, test safety reversal system. Door MUST reverseon contact with a 1-1/2" (3.8 cm) high object (or a 2x4 laid flat) on

thefloor.

INSTALLATION STEP 1

Determine the Header Bracket Location

Toprevent possible SERIOUSINJURYor DEATH:

• Header bracketMUSTbe RIGIDLYfastened to structural support on headerwall or ceiling, otherwise

garagedoor might not reversewhen required. DONOT install header bracketover drywall.

• Concrete anchors MUST be usedif mounting header bracket or 2x4 into masonry.

• NEVERtry to loosen,move or adjust garagedoor, springs, cables,pulleys, brackets,or their hardware, all

of which areunder EXTREMEtension.

• ALWAYScall a trained door systems technician if garagedoor binds,sticks, or is out of balance.An

unbalancedgaragedoor might not reversewhen required.

Installation procedures vary according to garage door

types, Follow the instructions which apply to your door.

Finished

Ceiling

2x4 Structural

Supports

Ceiling

SECTIONAL DOOR AND ONE-PIECE DOOR WITH TRACK

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 (1.2 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 10) 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 as

shown here and on page 13.

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.

Proceed to Step 2, page 14.

One-piece

door with

horizontal

track

Header Wall

: 2" (5cm) Track

Highest Point of Travel

Door

Sectional door

with curved track

_all

+ 28 hidden pages