Liftmaster 1246R User Manual

The Chamberlain Group, Inc. 845 Larch Avenue Elmhurst, Illinois 60126-1196

www.liftmaster.com

GARAGE DOOR OPENER

Model Series 1200

For Residential Use Only

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.

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

Model 1255R - 1/2HP Model 1245R - 1/3HP

Model 1240R - 1/4HP

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.

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.

Mechanical

Electrical

WARNING

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®................................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®........................................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

WARNING

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.

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.

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.

Tools needed

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

WARNING

Sectional Door

One-Piece Door

WARNING

CAUTION

Carpenter's Level (Optional)

Drill

Tape Measure

3/16", 5/16" and 5/32" Drill Bits

Pencil

Hack Saw

Wire Cutters

Claw Hammer

Pliers

Stepladder

1/2" and 7/16" Sockets and Wrench

Screwdriver

Adjustable End Wrench

SECTIONAL DOOR INSTALLATION

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 reinforcement 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 (1.22 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.

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

— — — — — — — —

Vertical Centerline of Garage Door

Slack in chain tension is normal when garage door is closed

Torsion Spring

Wallmounted Door Control

Extension Spring

Access Door

FINISHED CEILING

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

Header Bracket

Chain Pulley Bracket

Garage Door Spring

Motor unit

CLOSED POSITION

Trolley

Safety Reversing Sensor

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

Safety Reversing Sensor

Header Wall

Garage Door

Straight Door Arm

Curved Door Arm

Door Bracket

Emergency Release Rope & Handle

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.

WARNING

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 WITH TRACK

ONE-PIECE DOOR WITHOUT TRACK

CLOSED POSITION

WARNING

Slack in chain tension is normal when

Header Wall

garage door is closed.

Access Door

FINISHED CEILING Support bracket & fastening hardw See page 17.

Wall-mounted Door Control

are is

required.

Motor Unit

Chain Pulley Bracket

Trolley

Gap between floor

Safety Reversing Sensor

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

Safety Reversing Sensor

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

Safety Reversing Sensor

Access Door

Safety Reversing Sensor

Header Wall

Garage Door

Header Wall

Chain Pulley Bracket

Header Bracket

Door Bracket

Garage Door

CLOSED POSITION

Chain

Curved Door Arm

Door Bracket

Straight Door Arm

Rail

Straight Door Arm

Trolley

Emergency

Rail

Release Rope & Handle

Curved Door Arm

Emergency Release 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

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.

Lighted Door Control Button w/6ABx1-1/2" screws

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

Light Lens (1)

SECURITY✚

Single-Button Remote Control (1)

2-Conductor Bell Wire White & White/Red

All Models except 1256R & 1246R

Sprocket Cover

Chain

Remote Control Transmitter Visor Clip

Models 1256R & 1246R only

One-Piece Rail

Styrofoam

Chain Spreader with Screws and Washers

Header Bracket

Safety Sensor Bracket (2)

Chain Pulley Bracket

Safety Labels and Literature

Trolley

Curved Door Arm Section

Straight Door Arm Section

Door Bracket

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

Hardware Inventory

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

INSTALLATION HARDWARE

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

Lag Screw 5/16"-18x1-7/8" (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)

NOTICE

Handle

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

Clevis Pin 5/16"x1" (1)

Lock Washer 5/16" (4)

Nut 5/16"-18 (4)

Wing Nut 1/4"-20 (2)

Ring Fastener (3)

Staples (30)

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

Rail Grease

Rope

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

WARNING

ASSEMBLY STEP 1

Fasten the Rail to the Motor Unit

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

• 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

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.

CAUTION

USE ONLY THIS TYPE AND SIZE

BOLT

USE ONLY THIS TYPE AND SIZE

BOLT

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

Rail Hole

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

Styrofoam

Motor Unit Sprocket

Front Tab Slot

Sprocket Cover

Back Tab Slot

Mounting Plate

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.

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

WARNING

CAUTION

Chain

Rail

USE ONLY THIS

TYPE AND SIZE

Styrofoam Packaging

BOLT

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

USE ONLY THIS TYPE AND SIZE

BOLT

Motor Unit Sprocket

Mounting Plate

Styrofoam Packaging

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.

Figure 1

Figure 2 Figure 3

Figure 4

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.

WARNING

#8x1"

USE ONLY THIS TYPE AND SIZE SCREW

Hex Screw

Slot

Rail Flange

Washers

Chain Spreader

Trolley Threaded Shaft

Rail

Trolley

Outer Nut

Inner Nut and Washer

Chain Spreader

8-Tooth Sprocket

Motor Unit Mounting Plate

6-Tooth Sprocket

Motor Unit Mounting Plate

Install Chain In This Direction

Sprocket

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.

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

IMPORTANT INSTALLATION INSTRUCTIONS

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.

To reduce the risk of SEVERE INJURY or DEATH:

WARNING

INSTALLATION

To Tighten Outer Nut

Trolley

Chain

Base of Rail

Outer Nut

Mid Length of Rail

Lock Washer

1/2" (13 mm)

Inner Nut

To Tighten Inner Nut

WARNING

INSTALLATION STEP 1

Determine the Header Bracket Location

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.

One-piece

door with

horizontal

track

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.

Sectional door with curved track

WARNING

Header Wall

Ceiling

Finished Ceiling

2x4

Vertical Centerline of Garage Door

Structural Supports

Header Wall

2" (5 cm)

Highest Point of Travel

Door

Track

Header Wall

2" (5 cm)

Highest Point of Travel

Track

+ 28 hidden pages

Liftmaster 1246R User Manual

INTRODUCTION

Safety Symbol and Signal Word Review

TABLE OF CONTENTS

Preparing your garage door

Planning

Carton Inventory

Hardware Inventory

INSTALLATION

INSTALLATION STEP 1