Chamberlain 1255R - 1-2HP, 1246R - 1-3HP, 1240R - 1-4HP, 1256R - 1-2HP, 1245R - 1-3HP User Manual

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The Chamberlain Group, Inc. 845 Larch Avenue

Elmhurst, Illinois 60126-1196 www.liftmaster.com

®

®

GARAGE DOOR OPENER

Model Series 1200

For Residential Use Only

Model 1256R - 1/2HP

 

 

 

Model 1255R - 1/2HP

Model 1246R - 1/3HP

 

 

 

 

 

 

Model 1245R - 1/3HP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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 SystemÆ 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 SystemÆ................................

 

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 SystemÆ........................................

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

37-38

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

37

Installation parts ........................................................

37

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

38

Accessories

39

Repair Parts and Service

40

Warranty

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.

WARNING

Mechanical

WARNING

Electrical

CAUTION

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.

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.

2

Preparing your garage door

Before you begin:

ïDisable locks.

ïRemove any ropes connected to garage door.

ïComplete 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.

Sectional Door

One-Piece Door

WARNING

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 installing and operating garage door opener to avoid entanglement.

CAUTION

To prevent damage to garage door and opener:

ALWAYS disable locks BEFORE installing and operating the opener.

ONLY operate garage door opener at 120V, 60 Hz to avoid malfunction and damage.

Tools needed

During assembly, installation and adjustment of the opener, instructions will call for hand tools as illustrated below.

Carpenter's

Level (Optional)

Pencil

1

2

Hack Saw

Tape Measure

Wire Cutters

 

Drill

3/16", 5/16" and

 

Claw Hammer

 

 

5/32" Drill Bits

 

Pliers

 

 

 

 

Stepladder

1/2" and 7/16" Sockets

Screwdriver

 

and Wrench

 

Adjustable End Wrench

 

 

 

3

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.

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

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

ïInstallation Step 10 ñ Depending upon garage construction, extension brackets or wood blocks may be needed to install sensors.

ïInstallation Step 10 ñ Alternate floor mounting of the safety reversing sensor will require hardware not provided.

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

ïLook 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

ïDo you have a steel, aluminum, fiberglass or glass panel door? If so, horizontal and vertical reinforcement is required (Installation Step 11).

ïThe 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 (1.22 m) to the left or right of the door center. See Installation Steps 1 and 11.

ïIf your door is more than 7 feet (2.13 m) high, see rail extension kits listed on Accessories page.

SECTIONAL DOOR INSTALLATION

 

FINISHED CEILING

 

 

 

 

 

 

 

 

 

 

 

 

 

Support bracket &

 

 

 

 

 

 

fastening hardware

 

 

 

 

 

 

is required.

 

 

Horizontal and vertical reinforcement

Slack in chain tension

See page 17.

 

is needed for lightweight garage doors

 

 

 

 

is normal when

 

 

 

 

(fiberglass, steel, aluminum, door with

 

 

 

 

garage door is closed

 

 

 

 

glass panels, etc.). See page 24 for details.

 

 

 

 

 

 

 

 

 

 

 

Header Wall

 

 

 

 

 

Motor unit

 

 

 

 

Extension

 

 

 

 

 

 

 

Torsion OR

Spring

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Spring

 

 

 

 

 

 

 

 

Wall-

 

 

 

 

 

 

 

 

mounted Access

 

 

 

 

 

 

 

Door

Door

 

 

 

 

 

 

 

Control

 

 

 

 

 

 

 

 

 

 

 

 

Vertical

 

 

 

 

 

 

 

 

 

 

 

 

CLOSED POSITION

 

Centerline of

 

 

Header

 

 

 

 

 

 

 

 

Garage Door

 

 

 

Chain Pulley

 

 

 

 

 

Bracket

 

 

 

 

 

 

Bracket

Trolley

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

— — —

 

 

 

 

Garage

 

 

 

 

 

 

 

Door

 

 

— —

 

 

 

 

Spring

 

 

 

 

 

 

 

Straight

 

 

 

 

 

 

 

 

Emergency

 

 

 

Safety

 

 

 

Door

 

 

 

 

 

 

Arm

Release

 

Gap between floor

Reversing

 

 

 

 

Rope & Handle

Safety Reversing Sensor

and bottom of door must

Sensor

 

 

 

Curved

 

not exceed 1/4" (6 mm)

 

 

 

 

Door

 

 

 

Header

 

 

 

 

 

 

 

 

 

Arm

 

 

 

 

 

Wall

Door Bracket

 

 

 

 

 

Garage

 

 

 

 

 

 

 

 

 

 

 

 

 

Door

 

 

 

 

4

Chamberlain 1255R - 1-2HP, 1246R - 1-3HP, 1240R - 1-4HP, 1256R - 1-2HP, 1245R - 1-3HP User Manual

Planning (Continued)

ONE-PIECE DOOR INSTALLATIONS

ïGenerally, 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.

ïDepending on your doorís 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

garage door is closed. Header

Wall

WARNING

Without a properly working safety reversal system, persons (particularly small children) could be SERIOUSLY INJURED or KILLED by a closing garage door.

The gap between the bottom of the garage door and the floor MUST NOT exceed 1/4" (6 mm). Otherwise, the safety reversal system may not work properly.

The floor or the garage door MUST be repaired to eliminate the gap.

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

Motor Unit

Gap between floor

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

Wall-mounted

 

 

 

 

Door Control

 

 

 

 

Access

 

 

 

 

Door

CLOSED POSITION

 

 

 

 

Chain

 

 

 

 

Pulley Bracket

 

Trolley

 

 

 

 

 

 

Header

 

 

 

 

Bracket

Rail

 

 

 

Door

 

 

 

 

 

 

 

Bracket

 

 

 

Safety Reversing

 

 

 

Emergency

 

 

 

Release

Sensor

 

Straight

Curved

 

Rope

 

 

Door

 

 

Door

& Handle

 

 

Arm

Header

Garage

Arm

 

 

 

 

 

 

Wall

Door

 

 

 

ONE-PIECE DOOR WITH TRACK

Safety

Reversing

Sensor

Gap between floor and bottom of door must not exceed 1/4" (6 mm)

 

 

CLOSED POSITION

 

 

Chain

 

Chain

Trolley

 

Header

Pulley Bracket

 

 

 

 

 

 

 

 

 

 

Wall

 

 

 

 

 

Access

Header

Curved

 

 

Door

Bracket

Door Arm

 

Rail

 

Door

Straight

 

 

Garage

Bracket

 

 

Door

 

 

Door

 

 

 

 

Arm

 

 

 

 

 

 

Emergency Release

 

 

 

 

 

 

 

 

 

 

Rope & Handle

Safety

 

 

 

 

 

Reversing

 

 

 

 

 

Sensor

 

 

 

 

 

5

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

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

 

SECURITY ®

Sprocket Cover

Styrofoam

Lighted Door Control Button

Single-Button Remote Control (1)

 

 

w/6ABx1-1/2" screws

 

 

 

 

 

Chain

 

Remote Control

Transmitter Visor Clip

Models 1256R, 1255R, 1246R, & 1245R

Models 1256R & 1246R only

 

2-Conductor Bell Wire

 

 

White & White/Red

One-Piece

Light Lens (1)

 

 

Rail

 

 

Chain Spreader with

Screws and Washers

 

 

LY

 

NT

ON

G

MOU

 

ILIN

 

 

CE

 

 

 

UP

 

Trolley

 

Chain

Header Bracket

Pulley Bracket

Curved Door Arm Section

Straight Door

Arm Section

Door Bracket

Safety Sensor

Bracket (2)

Safety Labels and Literature

(2) Safety Reversing Sensors

(1 Sending Eye and 1 Receiving Eye) with 2-Conductor White & White/Black Bell Wire attached

6

Hardware Inventory

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

 

 

INSTALLATION HARDWARE

 

Lag Screw

Hex Bolt

Lock Washer 5/16" (4)

Rail Grease

5/16"-9 x1-5/8" (2)

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

 

 

NOTICE

 

 

Lag Screw

Handle

 

 

5/16"-18x1-7/8" (2)

Nut 5/16"-18 (4)

Ring Fastener (3)

 

 

 

 

 

 

 

 

Rope

Self-Threading Screw

Dry Wall

Carriage Bolts

Wing Nut

Staples (30)

1/4"-14x5/8" (2)

Anchors (2)

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

1/4"-20 (2)

 

 

Clevis Pin

 

Clevis Pin

Clevis Pin

 

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

 

5/16"x1" (1)

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

7

ASSEMBLY STEP 1

Fasten the Rail to the Motor Unit

MODELS 1255R 1245R, and 1240R

(For Models 1256R and 1246R see page 9)

ïRemove the two washered bolts mounted in top of motor unit.

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

ïThread one of the washered bolts part way in.

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

ïAlign rail and styrofoam over sprocket. Cut tape from rail, chain and styrofoam.

ïREMOVE STYROFOAM.

ASSEMBLY STEP 2

Attach the Chain to the Sprocket and Install the Sprocket Cover

MODELS 1255R 1245R, and 1240R

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

ïInsert the second washered bolt. CAUTION: Use only the bolt previously removed from motor unit!

ïTighten both screws securely through the rail into the motor unit as shown.

ïInstall 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.

CAUTION

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

 

Washered Bolt

USE ONLY THIS

5/16"-18x1/2"

 

TYPE AND SIZE

Styrofoam

BOLT

Rail

 

 

Hole

Washered Bolt

Motor Unit

-18x1/2"

Sprocket

 

USE ONLY THIS

TYPE AND SIZE

BOLT

Sprocket Cover

Back Tab Slot

Front Tab Slot

Mounting

Plate

8

ASSEMBLY STEP 1

Fasten the Rail to the Motor Unit

MODELS 1256R and 1246R ONLY

ïRemove the two washered bolts mounted in top of motor unit.

ïAlign rail and styrofoam over sprocket.

ïCut tape from rail, chain and styrofoam. Remove styrofoam and pull the chain back (away from the mounting plate).

ïFasten 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.

CAUTION

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

Styrofoam

Packaging

Chain

 

Rail

USE ONLY THIS

Washered

Bolts

TYPE AND SIZE

5/16"-18x1/2"

BOLT

Motor

Unit

Sprocket

 

Washered Bolts

 

5/16"-18x1/2"

USE ONLY THIS

Mounting

Plate

TYPE AND SIZE

 

BOLT

 

Styrofoam

Packaging

9

ASSEMBLY STEP 2

Attach the Chain Spreader

and Re-install the Chain

MODELS 1256R AND 1246R ONLY

ïLine 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).

ïSecurely fasten the chain spreader with the hardware provided.

ïRemove the trolley threaded shaft from the trolley by loosening the inner nut and lock washer (Figure 2).

ïGuide 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).

ïContinue 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.

 

 

Outer

Inner Nut

Trolley

 

 

 

Nut

and Washer

Threaded Shaft

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Rail

Trolley

Figure 2

WARNING

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

ALWAYS keep hand clear of sprocket while operating opener.

Securely attach sprocket cover BEFORE operating.

 

#8x1"

 

Hex Screw

USE ONLY

Washers

Chain

THIS TYPE

Spreader

AND SIZE

Slot

SCREW

 

Rail

Flange

Figure 1

Chain

 

Spreader

8-Tooth

 

 

Sprocket

Motor Unit

Mounting Plate

Chain

Spreader 6-Tooth

Sprocket

Motor Unit

Mounting Plate

Figure 3

Install Chain

In This Direction

Chain

 

Spreader

Sprocket

Figure 4

10

ASSEMBLY STEP 5

Tighten the Chain

ALL MODELS

 

Lock

 

Outer Nut

Washer

Inner Nut

To Tighten Outer Nut

 

 

 

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

ïTo tighten the chain, turn outer nut in the direction shown. AS YOU TURN THE NUT, KEEP THE CHAIN FROM TWISTING.

ïWhen 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.

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

INSTALLATION

To Tighten

Inner Nut

Trolley

Chain

1/2" (13 mm)

Base of Rail Mid Length of Rail

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 emergency release handle 6 feet (1.83 m) above floor.

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 flat) on the floor.

11

INSTALLATION STEP 1

Determine the Header Bracket

Location

WARNING

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.

Finished

Ceiling

Header

2x4

Structural

Wall

 

 

Supports

Vertical

Centerline

of Garage Door

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

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.

Ceiling

 

Header Wall

 

2" (5 cm)

Track

Highest Point

 

of Travel

Sectional door

 

 

with curved

Door

track

 

 

Header Wall

2" (5 cm) Track

One-piece

 

 

Highest Point

door with

 

 

of Travel

Door

 

 

horizontal

 

 

 

 

 

 

track

 

 

 

12

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