Chamberlain 1345M Users Manual 114A3587
1345M 114A3587
1345M to the manual 2656f72f-aac5-15e4-a946-e4e54a58d8c2
2015-01-25
: Chamberlain Chamberlain-1345M-Users-Manual-213734 chamberlain-1345m-users-manual-213734 chamberlain pdf
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Page Count: 40
- Owner’s Manual
- TABLE OF CONTENTS
- INTRODUCTION
- ASSEMBLY
- Fasten the Rail to the Motor Unit - MODELS 1355M AND 1345M ONLY
- Attach the Chain to the Sprocket andInstall the Sprocket Cover - MODELS 1355M AND 1345M ONLY
- Fasten the Rail to the Motor Unit - MODELS 1356M AND 1346M ONLY
- Attach the Chain Spreaderand Re-install the Chain - MODELS 1356M AND 1346M ONLY
- Tighten the Chain
- INSTALLATION
- Determine the Header BracketLocation
- Install the Header Bracket
- Attach the Rail to the Header Bracket
- Position the Opener
- Hang the Opener
- Install the Door Control
- Install the Light and Lens
- Attach the Emergency Release Ropeand Handle
- Electrical Requirements
- Install The Protector System®
- Fasten the Door Bracket
- Connect Door Arm to Trolley
- ADJUSTMENT
- OPERATION
- PROGRAMMING
- REPAIR PARTS
- ACCESSORIES
- WARRANTY
- SPANISH

The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
www.liftmaster.com
GARAGE DOOR OPENER
Model Series 1300
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 1356M - 1/2HP
Model 1346M - 1/3HP Model 1355M - 1/2HP
Model 1345M - 1/3HP

2
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
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
TABLE OF CONTENTS

3
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.
Pliers
Wire Cutters
Claw Hammer
Hack Saw
Screwdriver Adjustable End Wrench
1/2" and 7/16" Sockets
and Wrench
Drill
Tape Measure
2
1
Stepladder
Pencil
3/16", 5/16" and
5/32" Drill Bits
Carpenter’s
Level (Optional)
Sectional Door
One-Piece Door

4
Safety Reversing Sensor
Support bracket &
fastening hardware
is required.
See page 17.
— — — — — — — —
Header Wall
FINISHED CEILING
Torsion
Spring
Extension
Spring
OR
Safety
Reversing
Sensor
Gap between floor
and bottom of door must
not exceed 1/4" (6 mm)
Access
Door
Wall-
mounted
Door
Control
Horizontal and vertical reinforcement
is needed for lightweight garage doors
(fiberglass, steel, aluminum, door with
glass panels, etc.). See page 24 for details.
Motor unit
Slack in chain tension
is normal when
garage door is closed
Vertical
Centerline of
Garage Door
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 1702LM 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.
Chain Pulley
Bracket
Header
Bracket Trolley
Straight
Door
Arm
Emergency
Release
Rope & Handle
Door Bracket
Garage
Door
Curved
Door
Arm
Garage
Door
Spring
Header
Wall
CLOSED POSITION

5
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.
Access
Door
Gap between floor and
bottom of door must not
exceed 1/4" (6 mm)
Safety
Reversing
Sensor
Safety
Reversing
Sensor
CLOSED POSITION
Header
Bracket
Chain
Pulley Bracket
Door
Bracket Straight
Door
Arm
Curved
Door Arm
Trolley
Emergency Release
Rope & Handle
Rail
Garage
Door
Chain
Header
Wall
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
FINISHED CEILING
Support bracket
& fastening
hardware is required.
See page 17.
Slack in chain tension
is normal when
garage door is closed.
Header
Wall
Safety Reversing
Sensor
Safety Reversing
Sensor
Gap between floor
and bottom of door must
not exceed 1/4" (6 mm)
Access
Door
Wall-mounted
Door Control
Motor Unit
ONE-PIECE DOOR WITHOUT TRACK
Chain
Pulley Bracket
Header
Bracket
Trolley
Straight
Door
Arm
Emergency
Release
Rope
& Handle
Door
Bracket
Curved
Door
Arm
Header
Wall
Rail
Garage
Door
CLOSED POSITION

6
Straight Door
Arm Section
Curved Door Arm Section
Safety Labels
and
Literature
Header Bracket
UP
CEILING MOUNT ONLY
Sprocket Cover
2-Conductor Bell Wire
White & White/Red
Lighted Door Control Button
w/6ABx1-1/2" screws
Motor Unit with Light Lens
Remote Control
Transmitter Visor Clip
One-Piece
Rail
Styrofoam
Chain
Pulley Bracket
Chain Spreader with
Screws and Washers
Trolley
Chain
Door Bracket
SECURITY✚®
Single-Button Remote Control (1)
The Protector System®
(2) Safety Reversing Sensors
(1 Sending Eye and 1 Receiving Eye)
with 2-Conductor White & White/Black
Bell Wire attached
Safety Sensor
Bracket (2)
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.
Model 1355M &
1345M ONLY
Models 1346M & 1356M ONLY

7
Hardware Inventory
Separate all hardware and group as shown below for the assembly and installation procedures.
Nut 5/16"-18 (4)
Clevis Pin
5/16"x2-3/4" (1)
NOTICE
Handle
Drywall
Anchors (2)
Clevis Pin
5/16"x1" (1) Clevis Pin
5/16"x1-1/4" (1)
Hex Bolt
5/16"-18x7/8" (4)
Rope
Ring Fastener (3)
Lock Washer 5/16" (4)
Lag Screw
5/16"-9 x1-5/8" (2)
Wing Nut
1/4"-20 (2)
Staples (30)
Rail Grease
Carriage Bolts
1/4"-20x1/2" (2)
Lag Screw
5/16"-18x1-7/8" (2)
Self-Threading Screw
1/4"-14x5/8" (2)
INSTALLATION HARDWARE

8
To avoid SERIOUS damage to garage door opener,
use ONLY those bolts/fasteners mounted in the top of the
opener.
ASSEMBLY STEP 1
Fasten the Rail to the Motor Unit
MODELS 1355M AND 1345M ONLY
(For Models 1356M and 1346M 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.
Washered Bolt
5/16"-18x1/2"
Styrofoam
Rail
Hole
USE ONLY THIS
TYPE AND SIZE
BOLT
Washered Bolt
5/16"-18x1/2" Motor Unit
Sprocket
USE ONLY THIS
TYPE AND SIZE
BOLT
Sprocket Cover
Mounting
Plate
Front Tab Slot
Back Tab Slot
ASSEMBLY STEP 2
Attach the Chain to the Sprocket and
Install the Sprocket Cover
MODELS 1355M AND 1345M ONLY
• 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 5.

9
ASSEMBLY STEP 3
Fasten the Rail to the Motor Unit
MODELS 1356M AND 1346M 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.
USE ONLY THIS
TYPE AND SIZE
BOLT
Washered
Bolts
5/16"-18x1/2"
Chain
Rail
Styrofoam
Packaging
Motor
Unit
Sprocket
Washered Bolts
5/16"-18x1/2"
Styrofoam
Packaging
Mounting
Plate
USE ONLY THIS
TYPE AND SIZE
BOLT
To avoid SERIOUS damage to garage door opener,
use ONLY those bolts/fasteners mounted in the top of the
opener.

10
ASSEMBLY STEP 4
Attach the Chain Spreader
and Re-install the Chain
MODELS 1356M AND 1346M 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.
Trolley
Trolley
Threaded Shaft
Outer
Nut
Rail
Inner Nut
and Washer
Chain
Spreader
#8x1"
Hex Screw
USE ONLY
THIS TYPE
AND SIZE
SCREW
Rail
Flange
Slot
Washers
Sprocket
Install Chain
In This Direction
Chain
Spreader
Figure 1
Figure 2
Figure 3
Figure 4
8-Tooth
Sprocket
6-Tooth
Sprocket
Chain
Spreader
Motor Unit
Mounting Plate
Motor Unit
Mounting Plate
Chain
Spreader
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.

11
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.
Lock
Washer
To Tighten Outer Nut
Inner Nut
Trolley
Chain
Base of Rail
1/2" (13 mm)
To Tighten
Inner Nut
Outer Nut
Mid Length of Rail
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
WARNING
WARNINGWARNING
INSTALLATION

12
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.
Header Wall
Ceiling
Track
Highest Point
of Travel
Door
2" (5 cm)
Sectional door
with curved
track
Door
Track
Header Wall
Highest Point
of Travel
2" (5 cm)
Finished
Ceiling
Header
Wall 2x4 Structural
Supports
Vertical
Centerline
of Garage Door

13
Header Wall
Vertical
Centerline
of Garage
Door
2x4
Unfinished
Ceiling
2x4
OPTIONAL
CEILING MOUNT
FOR
HEADER BRACKET
Structural
Supports
ONE-PIECE DOOR WITHOUT TRACK
1. Close the door and mark the inside vertical centerline
of your garage door. Extend the line onto the header
wall above door, as shown.
If headroom clearance is minimal, you can install the
header bracket on the ceiling. See page 14.
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.
2. Open your door to the highest point of travel as shown.
Measure the distance from the top of the door to the
floor. Subtract the actual height of the door. Add 8" (20
cm) to the remainder. (See Example).
3. Close the door and draw an intersecting horizontal line
on the header wall at the determined height.
NOTE: If the total number of inches exceeds the
height available in your garage, use the maximum
height possible, or refer to page 14 for ceiling
installation.
Door
Highest Point
of Travel
Header Wall
Pivot
Distance
Floor
One-piece door without track:
pivot hardware
Header Wall
Highest Point
of Travel
Door
Floor
Distance
Jamb
Hardware
One-piece door without track:
jamb hardware
EXAMPLE
Distance from top of door
(at highest point of travel) to floor . . . . . . . .92" (234 cm)
Actual height of door . . . . . . . . . . . . . . . . .-88" (224 cm)
Remainder . . . . . . . . . . . . . . . . . . . . . . . . . . . .4" (10 cm)
Add . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+8" (20 cm)
Bracket height on header wall . . . . . . . . . . .=12" (30 cm)
(Measure UP from top of CLOSED door.)
Proceed to Step 2, page 14.

14
INSTALLATION STEP 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. Do not install the header bracket over
drywall. If installing into masonry, use concrete
anchors (not provided).
WALL HEADER BRACKET INSTALLATION
• Center the bracket on the vertical centerline with the
bottom edge of the bracket on the horizontal line as
shown (with the arrow pointing toward the ceiling).
• Mark the vertical set of bracket holes (do not use the
holes designated for ceiling mount). Drill 3/16" pilot
holes and fasten the bracket securely to a structural
support with the hardware provided.
Lag Screw
5/16"-9 x 1-5/8"
HARDWARE SHOWN ACTUAL SIZE
Lag Screws
5/16"-9x1-5/8"
Highest Point of
Garage Door Travel
Header
Wall
Garage
Door
UP
CEILING MOUNT ONLY
Wall Mounting Holes
Optional
Wall Mounting Holes
The nail hole is for
positioning only.
You must use lag screws
to mount the header bracke
UP
CEILING MOUNT ONLY
Door Spring
Header
Bracket
2x4
Structural
Support
Horizontal
Line
Vertical
Centerline
of Garage Door
Vertical
Centerline
of Garage Door
UP
CEILING MOUNT ONLY
Ceiling Mounting Holes
The nail hole is for
positioning only.
You must use lag screws
to mount the header bracket.
UP
Lag Screws
5/16"-9x1-5/8"
Garage Door
Header Wall
– Finished Ceiling –
Header
Bracket
6" (15 cm)
Maximum
Door
Spring
Vertical
Centerline
of Garage Door
Vertical
Centerline
of Garage Door
CEILING HEADER BRACKET INSTALLATION
• Extend the vertical centerline onto the ceiling as
shown.
• 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.
• Mark the side holes. Drill 3/16" pilot holes and fasten
bracket securely to a structural support with the
hardware provided.

15
Clevis Pin
5/16"x2-3/4" Ring Fastener
INSTALLATION STEP 3
Attach the Rail to the Header Bracket
• Position the opener on the garage floor below the
header bracket. Use packing material as a protective
base. NOTE: If the door spring is in the way you’ll
need help. Have someone hold the opener securely on
a temporary support to allow the rail to clear the
spring.
• Position the rail bracket against the header bracket.
• Align the bracket holes and join with a clevis pin
as shown.
• Insert a ring fastener to secure.
Header Bracket
Chain Pulley Bracket
Temporary
Support
Header Wall
Garage
Door
Clevis Pin
5/16"x2-3/4"
Ring Fastener
Header Bracket
Chain
Pulley
Bracket
Rail
HARDWARE SHOWN ACTUAL SIZE

16
ONE-PIECE DOOR WITHOUT TRACK
• With the door fully open and parallel to the floor,
measure the distance from the floor to the top of the
door.
• Using a stepladder as a support, raise the top of the
opener to this height.
• The top of the door should be level with the top of the
motor unit. Do not position the opener more than 2" (5
cm) above this point.
INSTALLATION STEP 4
Position the Opener
Follow instructions which apply to your door type as
illustrated.
SECTIONAL DOOR OR ONE-PIECE DOOR WITH
TRACK
A 2x4 laid flat is convenient for setting an ideal door-to-
rail distance.
• Raise the opener onto a stepladder. You will need help
at this point if the ladder is not tall enough.
• Open the door all the way and place a 2x4 laid flat on
the top section beneath the rail.
• If the top section or panel hits the trolley when you
raise the door, pull down on the trolley release arm
to disconnect inner and outer sections. Slide the outer
trolley toward the motor unit. The trolley can remain
disconnected until Installation Step 12 is completed.
Rail
Door 2x4 is used to determine
the correct mounting height
from ceiling.
Trolley
Release Arm
ENGAGED RELEASED
To prevent damage to garage door, rest garage door opener
rail on 2x4 placed on top section of door.
Header
Bracket
Top of Door
2x4 is used to determine
the correct mounting height
from ceiling.

17
INSTALLATION STEP 5
Hang the Opener
Two representative installations are shown. Yours may
be different. Hanging brackets should be angled (Figure
1) to provide rigid support. On finished ceilings (Figure 2
and Figure 3), attach a sturdy metal bracket to structural
supports before 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. Cut both pieces of the hanging bracket to required
lengths.
3. Drill 3/16" pilot holes in the structural supports.
4. Attach one end of each bracket to a support with
5/16"-18x1-7/8" lag screws.
5. Fasten the opener to the hanging brackets with 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 if the bracket is not
centered above the door).
7. Remove the 2x4. Operate the door manually. If the
door hits the rail, raise the header bracket.
8. Grease the top and underside of the rail surface where
the trolley slides with rail grease.
To avoid possible SERIOUS INJURY from a falling garage
door opener, fasten it SECURELY to structural supports of
the garage. Concrete anchors MUST be used if installing any
brackets into masonry.
Hex Bolt
5/16"-18x7/8" Nut 5/16"-18 Lock Washer 5/16"
Lag Screw 5/16"-9x1-5/8"
HARDWARE SHOWN ACTUAL SIZE
Measure
Distance
Lag Screws
5/16"-18x1-7/8"
Bolt 5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18
Structural
Supports
Bracket
(Not Provided)
Lag Screws
5/16"-18x1-7/8"
(Not Provided)
Bolt 5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18
FINISHED CEILING
Hidden
Support
Bolt 5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18
Bolt 5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18
Lag Screws
5/16"-18x1-7/8"
(Not Provided)
Bolt 5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18
FINISHED CEILING
Figure 1
Figure 2
RAIL GREASE
NO.83A11-2
Figure 3

18
To prevent possible SERIOUS INJURY or DEATH from
electrocution:
• Be sure power is not connected BEFORE installing door
control.
• Connect ONLY to 24 VOLT low voltage wires.
To prevent possible SERIOUS INJURY or DEATH from a
closing garage door:
• Install door control within sight of garage door, out of reach
of children at a minimum height of 5 feet (1.5 m), and away
from all moving parts of door.
• NEVER permit children to operate or play with door control
push buttons or remote control transmitters.
• Activate door ONLY when it can be seen clearly, is properly
adjusted, and there are no obstructions to door travel.
• ALWAYS keep garage door in sight until completely closed.
NEVER permit anyone to cross path of closing garage door.
Drywall Anchors Insulated
Staples
Screw 6ABx1-1/2"
Lighted Door Control Button
INSTALLATION STEP 6
Install the Door Control
Locate the door control within sight of the door at a
minimum height of 5 feet (1.5 m) where small children
cannot reach, and away from all moving parts of the door
and door hardware.
1. Strip 1/4" (6 mm) of insulation from one end of the bell
wire. Connect it to the two screw terminals on the back
of the door control by color: white wire to 2 and
white/red wire to 1.
2. Fasten the Lighted Door Control Button securely with
6ABx1-1/2" screws. If installing into drywall, drill 5/32"
holes and use the anchors provided.
3. Run the bell wire up the wall and across the ceiling to
the opener. Use insulated staples to secure the wire in
several places. Do not pierce wire with a staple,
creating a short or open circuit.
4. Receiver terminal screws and the antenna are located
on the back panel of the opener. Position the antenna
wire as shown.
5. Connect the bell wire to the opener terminal screws:
white to 2 and white/red to 1.
6. Use tacks or staples to permanently attach the
entrapment warning label to the wall near the door
control, and the manual release/safety reverse test in
a prominent location on the inside of the garage door.
NOTE: DO NOT connect the power and operate the
opener at this time. The trolley will travel to the full open
position but will not return to the close position until the
sensor beam is connected and properly aligned. See
Safety Reversing Sensor instructions beginning on page
21.
Opener
Terminal Screws
Bell Wire
Antenna
BACK PANEL
Lighted Door
Control Button
Terminal Screws
Bell Wire
WHT
RED
1
3
9
7
5
1
3
9
7
5
23
1
-2
-1
Lighted
Door Control Button
HARDWARE SHOWN ACTUAL SIZE

19
INSTALLATION STEP 7
Install the Light and Lens
INSTALL THE LIGHT
• Install an A19 standard neck, 75 watt maximum light
bulb in the socket. The light will turn ON and remain lit
for approximately 4-1/2 minutes when power is
connected. Then the light will turn OFF.
• Use standard neck Garage Door Opener bulbs for
replacement
INSTALL THE LENS
• Locate and loosen (approximately 1/8" (3 mm) the two
screws near top of opener front panel.
• Position lens against panel with slotted tabs directly
below screws. Slide lens up to seat tabs behind
screws.
• Snap bottom tabs of lens into panel slots.
• Retighten top panel screws to secure lens.
INSTALLATION STEP 8
Attach the Emergency Release Rope
and Handle
• Thread one end of the rope through the hole in the top
of the red handle so "NOTICE" reads right side up as
shown. Secure with an overhand knot at least 1" (2.5
cm) from the end of the rope to prevent slipping.
• Thread the other end of the rope through the hole in
the release arm of the outer trolley.
• Adjust rope length so the handle is 6 feet (1.83 m)
above the floor. Secure with an overhand knot.
NOTE: If it is necessary to cut the rope, heat seal the cut
end with a match or lighter to prevent unraveling.
To prevent possible SERIOUS INJURY or DEATH from a
falling garage door:
• If possible, use emergency release handle to disengage
trolley ONLY when garage door is CLOSED. Weak or broken
springs or unbalanced door could result in an open door
falling rapidly and/or unexpectedly.
• NEVER use emergency release handle unless garage
doorway is clear of persons and obstructions.
• NEVER use handle to pull door open or closed. If rope knot
becomes untied, you could fall.
Lens Slot
75 Watt Max.
Light Bulb
Lens Tab
Light
Lens
Panel Screw
Trolley
NOTICE
Overhand
Knot
Emergency
Release Handle
Rope
Trolley
Release Arm
To prevent possible OVERHEATING of the endpanel or light
socket:
• DO NOT use short neck or specialty light bulbs.
• DO NOT use halogen bulbs. Use ONLY incandescent.
To prevent damage to the opener:
• DO NOT use bulbs larger than 75W.
• ONLY use A19 size bulbs.

20
INSTALLATION STEP 9
Electrical Requirements
To avoid installation difficulties, do not run the
opener at this time.
To reduce the risk of electric shock, your garage door
opener has a grounding type plug with a third grounding
pin. This plug will only fit into a grounding type outlet. If
the plug doesn't fit into the outlet you have, contact a
qualified electrician to install the proper outlet.
If permanent wiring is required by your local code,
refer to the following procedure.
To make a permanent connection through the 7/8" hole
in the top of the motor unit:
• Remove the motor unit cover screws and set the cover
aside.
• Remove the attached 3-prong cord.
• Connect the black (line) wire to the screw on the brass
terminal; the white (neutral) wire to the screw on the
silver terminal; and the ground wire to the green
ground screw. The opener must be grounded.
• Reinstall the cover.
To avoid installation difficulties, do not run the
opener at this time.
RIGHT WRONG
To prevent possible SERIOUS INJURY or DEATH from
electrocution or fire:
• Be sure power is not connected to the opener, and
disconnect power to circuit BEFORE removing cover to
establish permanent wiring connection.
• Garage door installation and wiring MUST be in compliance
with all local electrical and building codes.
• NEVER use an extension cord, 2-wire adapter, or change
plug in ANY way to make it fit outlet. Be sure the opener is
grounded.
Ground Tab
Green
Ground Screw
Ground Wire
Black Wire
PERMANENT WIRING
CONNECTION
White Wire
Black
Wire

21
Invisible Light Beam
Protection Area
Safety Reversing Sensor
6" (15 cm) max. above floor Safety Reversing Sensor
6" (15 cm) max. above floor
Facing the door from inside the garage
INSTALLATION STEP 10
Install The Protector System®
The safety reversing sensor must be connected and
aligned correctly before the garage door opener will
move in the down direction.
IMPORTANT INFORMATION ABOUT
THE SAFETY REVERSING SENSOR
When properly connected and aligned, the sensor will
detect an obstacle in the path of its electronic beam. The
sending eye (with an amber indicator light) transmits an
invisible light beam to the receiving eye (with a green
indicator light). If an obstruction breaks the light beam
while the door is closing, the door will stop and reverse
to full open position, and the opener lights will flash
10 times.
The units must be installed inside the garage so that the
sending and receiving eyes face each other across the
door, no more than 6" (15 cm) above the floor. Either can
be installed on the left or right of the door as long as the
sun never shines directly into the receiving eye lens.
The mounting brackets are designed to clip onto the
track of sectional garage doors without additional
hardware.
If it is necessary to mount the units on the wall, the
brackets must be securely fastened to a solid surface
such as the wall framing. Extension brackets (see
accessories) are available if needed. If installing in
masonry construction, add a piece of wood at each
location to avoid drilling extra holes in masonry if
repositioning is necessary.
The invisible light beam path must be unobstructed. No
part of the garage door (or door tracks, springs, hinges,
rollers or other hardware) may interrupt the beam while
the door is closing.
Be sure power is not connected to the garage door opener
BEFORE installing the safety reversing sensor.
To prevent SERIOUS INJURY or DEATH from a closing
garage door:
• Correctly connect and align the safety reversing sensor.
This required safety device MUST NOT be disabled.
• Install the safety reversing sensor so beam is NO HIGHER
than 6" (15 cm) above garage floor.

22
DOOR TRACK MOUNT (RIGHT SIDE)
Indicator
Light
Lens
Lip
Sensor
Bracket
Door
Track
FLOOR MOUNT (RIGHT SIDE)
WALL MOUNT (RIGHT SIDE)
Indicator
Light
Sensor
Bracket
Lens
Extension
Bracket
(See Accessories)
Inside
Garage
Wall
(Provided with
Extension
Bracket)
(Provided with
Extension Bracket)
Figure 1
Figure 2
Figure 3
Figure 4
WALL MOUNT (RIGHT SIDE)
Attach with
Concrete Anchors
(Not Provided)
Inside
Garage
Wall
Sensor
Bracket
Lens
Indicator
Light
Inside
Garage
Wall
Indicator
Light Sensor
Bracket
Lens
Lag Screws
(Not Provided)
Fasten Wood Block to Wall with
Lag Screws (Not Provided)
INSTALLING THE BRACKETS
Be sure power to the opener is disconnected. Install
and align the brackets so the sensors will face each
other across the garage door, with the beam no higher
than 6" (15 cm) above the floor. They may be installed in
one of three ways, as follows.
Garage door track installation (preferred):
• Slip the curved arms over the rounded edge of each
door track, with the curved arms facing the door. Snap
into place against the side of the track. It should lie
flush, with the lip hugging the back edge of the track,
as shown in Figure 1.
If your door track will not support the bracket securely,
wall installation is recommended.
Wall installation (Figure 2 & 3):
• Place the bracket against the wall with curved arms
facing the door. Be sure there is enough clearance for
the sensor beam to be unobstructed.
• If additional depth is needed, an extension bracket
(see Accessories) or wood blocks can be used.
• Use bracket mounting holes as a template to locate
and drill (2) 3/16" diameter pilot holes on the wall at
each side of the door, no higher than 6" (15 cm) above
the floor.
• Attach brackets to wall with lag screws (not provided).
• If using extension brackets or wood blocks, adjust right
and left assemblies to the same distance out from the
mounting surface. Make sure all door hardware
obstructions are cleared.
Floor installation (Figure 4):
• Use wood blocks or extension brackets (see
Accessories) to elevate sensor brackets so the lenses
will be no higher than 6" (15 cm) above the floor.
• Carefully measure and place right and left assemblies
at the same distance out from the wall. Be sure all
door hardware obstructions are cleared.
• Fasten to the floor with concrete anchors as shown.
Wing Nut
1/4"-20
Staples
Carriage Bolt
1/4"-20x1/2"
HARDWARE SHOWN ACTUAL SIZE

23
Carriage Bolt
1/4"-20x1/2" Lens
Wing Nut
1/4"-20
Figure 5MOUNTING AND WIRING THE SAFETY REVERSING
SENSORS
• Slide a 1/4"-20x1/2" carriage bolt head into the slot on
each sensor. Use wing nuts to fasten sensors to
brackets, with lenses pointing toward each other across
the door. Be sure the lens is not obstructed by a
bracket extension (Figure 5).
• Finger tighten the wing nuts.
•Run the wires from both sensors to the opener. Use
insulated staples to secure wire to wall and ceiling.
• Strip 1/4" (6 mm) of insulation from each set of wires.
Separate white and white/black wires sufficiently to
connect to the opener terminal screws: white to 2 and
white/black to 3 (Figure 6).
ALIGNING THE SAFETY REVERSING SENSORS
•Plug in the opener. The indicator lights in both the
sending and receiving eyes will glow steadily if wiring
connections and alignment are correct.
The sending eye amber indicator light will glow regardless
of alignment or obstruction. If the green indicator light in
the receiving eye is off, dim, or flickering (and the invisible
light beam path is not obstructed), alignment is required.
• Loosen the sending eye wing nut and readjust, aiming
directly at the receiving eye. Lock in place.
• Loosen the receiving eye wing nut and adjust sensor
until it receives the sender’s beam. When the green
indicator light glows steadily, tighten the wing nut.
TROUBLESHOOTING THE SAFETY
REVERSING SENSORS
1. If the sending eye indicator light does not glow steadily
after installation, check for:
• Electric power to the opener.
• A short in the white or white/black wires. These can
occur at staples, or at terminal connections.
• Incorrect wiring between sensors and opener.
• A broken wire.
2. If the sending eye indicator light glows steadily but the
receiving eye indicator light doesn't:
• Check alignment.
• Check for an open wire to the receiving eye.
3. If the receiving eye indicator light is dim, realign either
sensor.
NOTE: When the invisible beam path is obstructed or
misaligned while the door is closing, the door will
reverse. If the door is already open, it will not close. The
opener lights will blink 10 times. (If bulbs are not
installed, 10 clicks can be heard.) See page 21.
Invisible Light Beam
Protection Area
Safety Reversing Sensor
Safety Reversing Sensor
Connect Wire to
Opener Terminal Screws
Bell Wire
Finished Ceiling
OPENER TERMINAL SCREWS
Sensor
Connections
Door Control
Connections
(dotted line)
1 2 3
Bell Wire
Figure 6

24
INSTALLATION STEP 11
Fasten the Door Bracket
Follow instructions which apply to your door type
as illustrated below or on the following page.
A horizontal reinforcement brace should be long
enough to be secured to two or three vertical
supports. A vertical reinforcement brace should
cover the height of the top panel.
Figure 1 shows one piece of angle iron as the horizontal
brace. For the vertical brace, 2 pieces of angle iron are
used to create a U-shaped support. The best solution is
to check with your garage door manufacturer for an
opener installation door reinforcement kit.
NOTE: Many door reinforcement kits provide for direct
attachment of the clevis pin and door arm. In this case
you will not need the door bracket; proceed to Step 12.
SECTIONAL DOORS
1. Center the door bracket on the previously marked
vertical centerline used for the header bracket
installation. Note correct UP placement, as stamped
inside the bracket.
2. Position the top edge of the bracket 2"-4"
(5-10 cm) below the top edge of the door, OR directly
below any structural support across the top of the
door.
3. Mark, drill holes and install as follows, depending on
your door’s construction:
Metal or light weight doors using a vertical angle
iron brace between the door panel support and the
door bracket:
• Drill 3/16" fastening holes. Secure the door bracket
using the two 1/4"-14x5/8" self-threading screws.
(Figure 2A)
• Alternately, use two 5/16" bolts, lock washers and nuts
(not provided). (Figure 2B)
Metal, insulated or light weight factory reinforced
doors:
• Drill 3/16" fastening holes. Secure the door bracket
using the self-threading screws (Figure 3).
Wood Doors:
• Use top and bottom or side to side door bracket holes.
Drill 5/16" holes through the door and secure bracket
with 5/16"x2" carriage bolts, lock washers and nuts
(not provided). (Figure 4)
NOTE: The 1/4"-14x5/8" self-threading screws are not
intended for use on wood
doors.
To prevent damage to garage door, reinforce inside of door
with angle iron both vertically and horizontally.
Vertical
Centerline
of Garage
Door
Door
Bracket
Location
Header
Bracket
HORIZONTAL AND VERTICAL
REINFORCEMENT IS NEEDED
FOR LIGHTWEIGHT GARAGE
DOORS (FIBERGLASS,
ALUMINUM, STEEL, DOORS
WITH GLASS PANEL, ETC.).
(NOT PROVIDED)
Door
Bracket
Vertical
Centerline
of Garage Door
UP
Vertical
Reinforcement
Self-Threading
Screw
1/4"-14x5/8"
Door
Bracket
Nut
5/16"-18
Bolt
5/16"-18x2"
Lock Washer
5/16"
UP
Vertical
Reinforcement
(Not Provided)
Vertical
Centerline
of Garage Door
UP
Self-Threading
Screw
1/4"-14x5/8"
Vertical
Centerline
of Garage Door
UP
Inside Edge
of Door or
Reinforcement Board
Bolt
5/16"x2"
(Not Provided)
Vertical
Centerline
of Garage
Door
Figure 1
Figure 2A
Figure 2B
Figure 3
Figure 4
Self-Threading
Screw
1/4"-14x5/8"
HARDWARE
SHOWN
ACTUAL SIZE

25
Header Wall
Vertical
Centerline of
Garage Door
Finished Ceiling
Optional
Placement
of Door
Bracket
Header
Bracket
Door
Bracket
2x4 Support
For a door with no exposed framing,
or for the optional installation, use
lag screws 5/16"x1-1/2" (Not Provided)
to fasten door bracket.
METAL DOOR
Top of Door
(Inside
Garage)
Door
Bracket
Optional
Placement
Top Edge
of Door
Self-Threading
Screw
1/4"-14x5/8"
Door
Bracket
Top of Door
(Inside
Garage)
Carriage Bolt
5/16"x2"
(Not Provided)
Optional
Placement
Lock
Washer
5/16"
Nut
5/16"-18
Top Edge
of Door
WOOD DOOR
HORIZONTAL AND VERTICAL
REINFORCEMENT IS NEEDED
FOR LIGHTWEIGHT GARAGE
DOORS (FIBERGLASS,
ALUMINUM, STEEL, DOORS
WITH GLASS PANEL, ETC.).
(NOT PROVIDED)
ONE-PIECE DOORS
Please read and comply with the warnings and
reinforcement instructions on the previous page. They
apply to one-piece doors also.
• Center the door bracket on the top of the door, in line
with the header bracket as shown. Mark either the left
and right, or the top and bottom holes.
•Metal Doors: Drill 3/16" pilot holes and fasten the
bracket with the 1/4"-14x5/8" self-threading screws
provided.
•Wood Doors: Drill 5/16" holes and use 5/16"x2"
carriage bolts, lock washers and nuts (not provided) or
5/16"x1-1/2" lag screws (not provided) depending on
your installation needs.
NOTE: The door bracket may be installed on the top
edge of the door if required for your installation. (Refer to
the dotted line optional placement drawing.)
Self-Threading Screw
1/4"-14x5/8"
HARDWARE SHOWN
ACTUAL SIZE

26
INSTALLATION STEP 12
Connect Door Arm to Trolley
Follow instructions which apply to your door type as
illustrated below and on the following page.
SECTIONAL DOORS ONLY
• Make sure garage door is fully closed. Pull the
emergency release handle to disconnect the outer
trolley from the inner trolley. Slide the outer trolley back
(away from the door) about 2" (5 cm) as shown in
Figures 1, 2 and 3.
• Figure 1:
– Fasten straight door arm section to outer trolley with
the 5/16"x1" clevis pin. Secure the connection with a
ring fastener.
– Fasten curved section to the door bracket in the
same way, using the 5/16"x1-1/4" clevis pin.
• Figure 2:
– Bring arm sections together. Find two pairs of holes
that line up and join sections. Select holes as far
apart as possible to increase door arm rigidity.
• Figure 3, Hole alignment alternative:
– If holes in curved arm are above holes in straight
arm, disconnect straight arm. Cut about 6" from the
solid end. Reconnect to trolley with cut end down as
shown.
– Bring arm sections together.
– Find two pairs of holes that line up and join with bolts,
lock washers and nuts.
• Proceed to Adjustment Step 1, page 28. Trolley will re-
engage automatically when opener is operated.
Ring
Fastener
Door
Bracket
Clevis Pin
5/16"x1-1/4"
Curved
Door Arm
Straight
Door Arm
Clevis Pin
5/16"x1"
Inner Trolley
Outer Trolley
Lock
Washers
5/16"
Nuts
5/16"-18
Door Bracket
Bolts
5/16"-18x7/8"
Emergency
Release
Handle
Lock
Washers
5/16"
Nuts
5/16"-18
Bolts
5/16"-18x7/8"
Cut This End
Figure 1
Figure 2
Figure 3
Lock Washer 5/16"
Nut 5/16"-18 Ring Fastener
Hex Bolt
5/16"-18x7/8"
Clevis Pin
5/16"x1" (Trolley)
Clevis Pin
5/16"x1-1/4" (Door Bracket)
HARDWARE SHOWN ACTUAL SIZE

27
ALL ONE-PIECE DOORS
1. Assemble the door arm, Figure 4:
• Fasten the straight and curved door arm sections
together to the longest possible length (with a 2 or 3
hole overlap).
• With the door closed, connect the straight door arm
section to the door bracket with the
5/16"x1-1/4" clevis pin.
• Secure with a ring fastener.
2. Adjustment procedures, Figure 5:
• On one-piece doors, before connecting the door arm
to the trolley, the travel limits must be adjusted. Limit
adjustment screws are located on the left side panel
as shown on page 28. Follow adjustment procedures
below.
• Open door adjustment: decrease UP
travel limit
- Turn the UP limit adjustment screw counter-
clockwise 5-1/2 turns.
- Press the Door Control push button. The trolley will
travel to the fully open position.
- Manually raise the door to the open position (parallel
to the floor), and lift the door arm to the trolley. The
arm should touch the trolley just in back of the door
arm connector hole. Refer to the fully open
trolley/door arm positions in the illustration. If the arm
does not extend far enough, adjust the limit further.
One full turn equals 2" (5 cm) of trolley travel.
• Closed door adjustment: decrease DOWN travel
limit
- Turn the DOWN limit adjustment screw clockwise
5 complete turns.
Nuts
5/16"-18
Lock
Washers
5/16"
Ring
Fastener
Straight
Arm
Bolts
5/16"-18x7/8
Door
Bracket
Clevis Pin
5/16"x1-1/4"
Curved
Door Arm
- Press the Door Control push button. The trolley will
travel to the fully closed position.
- Manually close the door and lift the door arm to the
trolley. The arm should touch the trolley just ahead of
the door arm connector hole. Refer to the fully closed
trolley/door arm positions in the illustration. If the arm
is behind the connector hole, adjust the limit further.
One full turn equals 2" (5 cm) of trolley travel.
3. Connect the door arm to the trolley:
• Close the door and join the curved arm to the
connector hole in the trolley with the remaining clevis
pin. It may be necessary to lift the door slightly to
make the connection.
• Secure with a ring fastener.
• Run the opener through a complete travel cycle. If the
door has a slight "backward" slant in full open position
as shown in the illustration, decrease the UP limit until
the door is parallel to the floor.
NOTE: When setting the up limit on the following page,
the door should not have a "backward" slant when fully
open as illustrated below. A slight backward slant will
cause unnecessary bucking and/or jerking operation as
the door is being opened or closed from the fully open
position.
Figure 4
Door Arm
Door Arm
Connector Hole
Closed
Door
Outer Trolley
Emergency Release Handle
Inner Trolley
Outer Trolley
Open Door
Door Arm
Correct Angle
Door with
Backward Slant (Incorrect)
Inner Trolley
Figure 5

28
ADJUSTMENT STEP 1
Adjust the UP and DOWN Travel Limits
Limit adjustment settings regulate the points at which the
door will stop when moving up or down.
To operate the opener, press the Door Control push bar.
Run the opener through a complete travel cycle.
• Does the door open and close completely?
• Does the door stay closed and not reverse
unintentionally when fully closed?
If your door passes both of these tests, no limit
adjustments are necessary unless the reversing test fails
(Adjustment Step 3, page 30).
Adjustment procedures are outlined below. Read the
procedures carefully before proceeding to Adjustment
Step 2. Use a screwdriver to make limit adjustments.
Run the opener through a complete travel cycle after
each adjustment.
NOTE: Repeated operation of the opener during
adjustment procedures may cause the motor to overheat
and shut off. Simply wait 15 minutes and try again.
NOTE: If anything interferes with the door’s upward
travel, it will stop. If anything interferes with the door’s
downward travel (including binding or unbalanced doors),
it will reverse.
HOW AND WHEN TO ADJUST THE LIMITS
• If the door does not open completely but opens at
least 5 feet (1.5 m):
Increase up travel. Turn the UP limit adjustment screw
clockwise. One turn equals 2" (5 cm) of travel.
NOTE: To prevent the trolley from hitting the cover
protection bolt, keep a minimum distance of 2-4" (5-10
cm) between the trolley and the bolt.
• If door does not open at least 5 feet (1.5 m):
Adjust the UP (open) force as explained in Adjustment
Step 2.
• If the door does not close completely:
Increase down travel. Turn the down limit adjustment
screw counterclockwise. One turn equals 2" (5 cm) of
travel.
If door still won't close completely and the trolley
bumps into the pulley bracket (page 4), try lengthening
the door arm (page 26) and decreasing the down limit.
• If the opener reverses in fully closed position:
Decrease down travel. Turn the down limit adjustment
screw clockwise. One turn equals 2"
(5 cm) of travel.
• If the door reverses when closing and there is no
Without a properly installed safety reversal system, persons
(particularly small children) could be SERIOUSLY INJURED
or KILLED by a closing garage door.
• Incorrect adjustment of garage door travel limits will
interfere with proper operation of safety reversal system.
• If one control (force or travel limits) is adjusted, the other
control may also need adjustment.
• After ANY adjustments are made, the safety reversal
system MUST be tested. Door MUST reverse on contact
with 1-1/2" (3.8 cm) high object (or 2x4 laid flat) on floor.
visible interference to travel cycle:
If the opener lights are flashing, the Safety Reversing
Sensors are either not installed, misaligned, or
obstructed. See Troubleshooting, page 23.
Test the door for binding: Pull the emergency release
handle. Manually open and close the door. If the door
is binding or unbalanced, call for a trained door
systems technician. If the door is balanced and not
binding, adjust the DOWN (close) force. See
Adjustment Step 2.
LEFT SIDE PANEL
Travel Limit Adjustment Screws
Cover
Protection
Bolt
2-4"
(5-10 cm)
Adjustment Label
To prevent damage to vehicles, be sure fully open door
provides adequate clearance.

29
ADJUSTMENT STEP 2
Adjust the Force
Force adjustment controls are located on the back panel
of the motor unit. Force adjustment settings regulate the
amount of power required to open and close the door.
If the forces are set too light, door travel may be
interrupted by nuisance reversals in the down direction
and stops in the up direction. Weather conditions can
affect the door movement, so occasional adjustment may
be needed.
The maximum force adjustment range is about 3/4 of
a complete turn. Do not force controls beyond that
point. Turn force adjustment controls with a screwdriver.
NOTE: If anything interferes with the door’s upward
travel, it will stop. If anything interferes with the door’s
downward travel (including binding or unbalanced doors),
it will reverse.
HOW AND WHEN TO ADJUST THE FORCES
1. Test the DOWN (close) force
• Grasp the door bottom when the door is about halfway
through DOWN (close) travel. The door should
reverse. Reversal halfway through down travel does
not guarantee reversal on a 1-1/2"
(3.8 cm) obstruction. See Adjustment Step 3, page 30.
If the door is hard to hold or doesn't reverse,
DECREASE the DOWN (close) force by turning
the control counterclockwise. Make small adjustments
until the door reverses normally. After each adjustment,
run the opener through a complete cycle.
• If the door reverses during the down (close) cycle
and the opener lights aren't flashing, INCREASE
DOWN (close) force by turning the control clockwise.
Make small adjustments until the door completes a
close cycle. After each adjustment, run the opener
through a complete travel cycle. Do not increase the
force beyond the minimum amount required to close
the door.
2. Test the UP (open) force
• Grasp the door bottom when the door is about halfway
through UP (open) travel. The door should stop. If the
door is hard to hold or doesn't stop, DECREASE
UP (open) force by turning the control
counterclockwise. Make small adjustments until the door
stops easily and opens fully. After each adjustment, run
the opener through a complete travel cycle.
• If the door doesn’t open at least 5 feet (1.5 m),
INCREASE UP (open) force by turning the control
clockwise. Make small adjustments until door opens
completely. Readjust the UP limit if necessary. After
each adjustment, run the opener through a complete
travel cycle.
Force Adjustment Controls
1
3
9
7
5
1
3
9
7
5
123
FORCE ADJUSTMENT LABEL
Kg
1
3
9
7
5
1
3
9
7
5
Kg
BACK PANEL
Without a properly installed safety reversal system, persons
(particularly small children) could be SERIOUSLY INJURED
or KILLED by a closing garage door.
• Too much force on garage door will interfere with proper
operation of safety reversal system.
• NEVER increase force beyond minimum amount required to
close garage door.
• NEVER use force adjustments to compensate for a binding
or sticking garage door.
• If one control (force or travel limits) is adjusted, the other
control may also need adjustment.
• After ANY adjustments are made, the safety reversal
system MUST be tested. Door MUST reverse on contact
with 1-1/2" (3.8 cm) high object (or 2x4 laid flat) on floor.

30
Without a properly installed safety reversal system, persons
(particularly small children) could be SERIOUSLY INJURED
or KILLED by a closing garage door.
• Safety reversal system MUST be tested every month.
• If one control (force or travel limits) is adjusted, the other
control may also need adjustment.
• After ANY adjustments are made, the safety reversal system
MUST be tested. Door MUST reverse on contact with 1-1/2"
(3.8 cm) high object (or 2x4 laid flat) on the floor.
ADJUSTMENT STEP 3
Test the Safety Reversal System
TEST
• With the door fully open, place a 1-1/2" (3.8 cm) board
(or a 2x4 laid flat) on the floor, centered under the
garage door.
• Operate the door in the down direction. The door must
reverse on striking the obstruction.
ADJUST
• If the door stops on the obstruction, it is not traveling
far enough in the down direction. Increase the DOWN
limit by turning the DOWN limit adjustment screw
counterclockwise 1/4 turn.
NOTE: On a sectional door, make sure limit
adjustments do not force the door arm beyond a
straight up and down position. See the illustration on
page 26.
• Repeat the test.
• When the door reverses on the 1-1/2" (3.8 cm) board,
remove the obstruction and run the opener through 3
or 4 complete travel cycles to test adjustment.
IMPORTANT SAFETY CHECK:
Repeat Adjustment Steps 1, 2 and 3 after:
• Each adjustment of door arm length, limits, or force
controls.
• Any repair to or adjustment of the garage door
(including springs and hardware).
• Any repair to or buckling of the garage floor.
• Any repair to or adjustment of the opener.
ADJUSTMENT STEP 4
Test the Protector System®
• Press the remote control push button to open the door.
• Place the opener carton in the path of the door.
• Press the remote control push button to close the door.
The door will not move more than an inch, and the
opener lights will flash.
The garage door opener will not close from a remote if
the indicator light in either sensor is off (alerting you to
the fact that the sensor is misaligned or obstructed).
If the opener closes the door when the safety
reversing sensor is obstructed (and the sensors are
no more than 6" (15 cm) above the floor), call for a
trained door systems technician.
Safety Reversing Sensor Safety Reversing Sensor
Without a properly installed safety reversing sensor, persons
(particularly small children) could be SERIOUSLY INJURED
or KILLED by a closing garage door.
1-1/2" (3.8 cm) board
(or a 2x4 laid flat)

31
OPERATION
Using Your Garage Door Opener
Your Security✚®opener and hand-held remote control
have been factory-set to a matching code which changes
with each use, randomly accessing over 100 billion new
codes. Your opener will operate with up to eight
Security✚®remote controls and one Security✚®Keyless
Entry System. If you purchase a new remote, or if you
wish to deactivate any remote, follow the instructions in
the Programming section.
Activate your opener with any of the following:
•The hand-held Remote Control: Hold the push button
down until the door starts to move.
•The wall-mounted Door Control: Hold the push button
or bar down until the door starts to move.
•The Keyless Entry (See Accessories): If supplied with
your garage door opener, it must be programmed
before use. See Programming.
When the opener is activated (with the safety
reversing sensor correctly installed and aligned)
1. If open, the door will close. If closed, it will open.
2. If closing, the door will reverse.
3. If opening, the door will stop.
4. If the door has been stopped in a partially open
position, it will close.
5. If obstructed while closing, the door will reverse. If the
obstruction interrupts the sensor beam, the opener
lights will blink for five seconds.
6. If obstructed while opening, the door will stop.
7. If fully open, the door will not close when the beam is
broken. The sensor has no effect in the opening cycle.
If the sensor is not installed, or is misaligned, the door
won't close from a hand-held remote. However, you can
close the door with the Door Control, the Outside
Keylock, or Keyless Entry, if you activate them until down
travel is complete. If you release them too soon, the door
will reverse.
The opener light will turn on under the following
conditions: when the opener is initially plugged in; when
power is restored after interruption; when the opener is
activated.
The light will also turn on when someone walks through
the open garage door.
It will turn off automatically after 4-1/2 minutes. Bulb size
is A19. Bulb power is 75 watts maximum.
IMPORTANT SAFETY INSTRUCTIONS
To reduce the risk of SEVERE INJURY or DEATH:
WARNING
WARNING
WARNINGWARNING
1. READ AND FOLLOW ALL WARNINGS AND
INSTRUCTIONS.
2. ALWAYS keep remote controls out of reach of children.
NEVER permit children to operate or play with garage
door control push buttons or remote controls.
3. ONLY activate garage door when it can be seen clearly, it
is properly adjusted, and there are no obstructions to
door travel.
4. ALWAYS keep garage door in sight until completely
closed. NO ONE SHOULD CROSS THE PATH OF THE
MOVING DOOR.
5. NO ONE SHOULD GO UNDER A STOPPED, PARTIALLY
OPEN DOOR.
6. If possible, use emergency release handle to disengage
trolley ONLY when garage door is CLOSED. Weak or
broken springs or unbalanced door could result in an
open door falling rapidly and/or unexpectedly.
7. NEVER use emergency release handle unless garage
doorway is clear of persons and obstructions.
8. NEVER use handle to pull garage door open or closed. If
rope knot becomes untied, you could fall.
9. If one control (force or travel limits) is adjusted, the
other control may also need adjustment.
10. After ANY adjustments are made, the safety reversal
system MUST be tested.
11. Safety reversal system MUST be tested every month.
Garage door MUST reverse on contact with 1-1/2"
(3.8 cm) high object (or a 2 x 4 laid flat) on the floor.
12. ALWAYS KEEP GARAGE DOOR PROPERLY BALANCED
(see page 3). An improperly balanced door may not
reverse when required and could result in SEVERE
INJURY or DEATH.
13. All repairs to cables, spring assemblies and other
hardware, ALL of which are under EXTREME tension,
MUST be made by a trained door systems technician.
14. ALWAYS disconnect electric power to garage door
opener BEFORE making ANY repairs or removing covers.
15. SAVE THESE INSTRUCTIONS.

32
To Open the Door Manually
The door should be fully closed if
possible. Pull down on the
emergency release handle and lift
the door manually. To reconnect
the door to the opener, press the
door control push button.
The lockout feature prevents the
trolley from reconnecting
automatically, Pull the emergency
release handle down and back
(toward the opener). The door can
then be raised and lowered
manually as often as necessary.
To disengage the lockout feature,
pull the handle straight down. The
trolley will reconnect on the next
UP or DOWN operation.
Using the Wall-Mounted
Door Control
Press the push button to open or close the door.
Press again to reverse the door during the closing
cycle or to stop the door while it's opening. To prevent possible SERIOUS INJURY or DEATH from a
falling garage door:
• If possible, use emergency release handle to disengage
trolley ONLY when garage door is CLOSED. Weak or broken
springs or unbalanced door could result in an open door
falling rapidly and/or unexpectedly.
• NEVER use emergency release handle unless garage
doorway is clear of persons and obstructions.
• NEVER use handle to pull door open or closed. If rope knot
becomes untied, you could fall.
Trolley
Release
Arm
NOTICE
Emergency
Release
Handle
(Pull Down)
Trolley
Release
Arm
NOTICE
Emergency
Release Handle
(Down and Back)
LOCKOUT POSITION
MANUAL DISCONNECT
POSITION

33
Having a Problem?
1. The opener doesn't operate from either the Door
Control or the remote control:
• Does the opener have electric power? Plug a lamp into
the outlet. If it doesn't light, check the fuse box or the
circuit breaker. (Some outlets are controlled by a wall
switch.)
• Have you disabled all door locks? Review installation
instruction warnings on page 11.
• Is there a build-up of ice or snow under the door? The
door may be frozen to the ground. Remove any
restriction.
• The garage door spring may be broken. Have it
replaced.
• Repeated operation may have tripped the overload
protector in the motor. Wait 15 minutes and try again.
2. Opener operates from the remote, but not from the
Door Control:
• Is the door control lit? If not, remove the bell wire from
the motor unit terminals. Short the red and white
terminals by touching both terminals at the same time
with a piece of wire. If the opener runs, check for a
faulty wire connection at the door control, a short
under the staples, or a broken wire.
• Are the wiring connections correct? Review Installation
Step 6, page 18.
3. The door operates from the Door Control, but not
from the remote control:
• Is the door push bar flashing? If your model has the
Lock feature, make sure it is off.
• Program the opener to match the remote control code.
(Refer to instructions on the motor unit panel.) Repeat
with all remotes.
4. The remote control has short range:
• Change the location of the remote control in your car.
• Check to be sure the antenna on the side or back
panel of motor unit extends fully downward.
• Some installations may have shorter range due to a
metal door, foil backed insulation, or metal garage
siding.
5. Opener noise is disturbing in living quarters of
home:
• If operational noise is a problem because of proximity
of the opener to the living quarters, the Vibration
Isolator Kit 89LM can be installed. This kit was
designed to minimize vibration to the house and is
easy to install.
NOTICE: To comply with FCC and or Industry Canada (IC) rules, adjustment or modifications of
this receiver and/or transmitter are prohibited, except for changing the code setting or replacing
the battery. THERE ARE NO OTHER USER SERVICEABLE PARTS.
Tested to Comply with FCC Standards FOR HOME OR OFFICE USE. Operation is subject to the
following two conditions: (1) this device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired operation.
The Remote Control Battery
The lithium battery should
produce power for up to 5 years.
To replace battery, use the visor
clip or screwdriver blade to pry
open the case as shown. Insert
battery positive side up (+).
Dispose of old battery properly.
Replace ONLY with 3V2032 coin
batteries.
To prevent possible SERIOUS INJURY or DEATH:
• NEVER allow small children near batteries.
• If battery is swallowed, immediately notify doctor.
To reduce risk of fire, explosion or chemical burn:
• Replace ONLY with 3V2032 coin batteries.
• Do NOT recharge, disassemble, heat above 100°C (212°F)
or incinerate.
Care of Your Opener
LIMIT AND FORCE ADJUSTMENTS:
Weather conditions may cause some
minor changes in door operation
requiring some readjustments,
particularly during the first year of
operation.
Pages 28 and 29 refer to the limit
and force adjustments. Only a
screwdriver is required. Follow the
instructions carefully.
Repeat the safety reverse test
(page 30) after any adjustment of
limits or force.
MAINTENANCE SCHEDULE
Once a Month
• Manually operate door. If it is unbalanced or binding,
call a trained door systems technician.
• Check to be sure door opens & closes fully. Adjust limits
and/or force if necessary. (See pages 28 and 29.)
• Repeat the safety reverse test. Make any necessary
adjustments. (See page 30.)
Twice a Year
• Check chain tension. Disconnect trolley first. Adjust if
necessary (see page 11).
Once a Year
• Oil door rollers, bearings and hinges. The opener does
not require additional lubrication. Do not grease the
door tracks.
LIMIT CONTROLS
(Left side panel)
FORCE CONTROLS
(Back panel)
KG KG
1
3
9
7
5
1
3
9
7
5
Open Force Close Force
Battery
positive
side up (+)

34
Having a Problem? (Continued)
6. The garage door opens and closes by itself:
• Be sure that all remote control push buttons are off.
• Remove the bell wire from the door control terminals
and operate from the remote only. If this solves the
problem, the door control is faulty (replace), or there is
an intermittent short on the wire between the door
control and the motor unit.
• Clear memory and re-program all remote controls.
7. The door doesn't open completely:
• Is something obstructing the door? Is it out of balance,
or are the springs broken? Remove the obstruction or
repair the door.
• If the door is in good working order but now doesn't
open all the way, increase the up force. See
Adjustment Step 2.
• If the door opens at least 5 feet (1.5 m), the travel
limits may need to be increased. One turn equals 2" (5
cm) of travel. See Adjustment Step 1.
Repeat the safety reverse test after the adjustment is
complete.
8. The door stops but doesn't close completely:
• Review the travel limits adjustment procedures on
page 28.
Repeat the safety reverse test after any adjustment
of door arm length, close force or down limit.
9. The door opens but won't close:
• If the opener lights blink, check the safety reversing
sensor. See Installation Step 10.
• If the opener lights don’t blink and it is a new
installation, check the down force. See Adjustment
Step 2, page 29. For an existing installation, see
below.
Repeat the safety reverse test after the adjustment
is complete.
10. The door reverses for no apparent reason and
opener lights don’t blink:
• Is something obstructing the door? Pull the emergency
release handle. Operate the door manually. If it is
unbalanced or binding, call a trained door systems
technician.
• Clear any ice or snow from the garage floor area
where the door closes.
• Review Adjustment Step 2 on page 29.
• If door reverses in the fully closed position, decrease
the travel limits (Adjustment Step 1).
Repeat safety reverse test after adjustments to force or
travel limits. The need for occasional adjustment of the
force and limit settings is normal. Weather conditions in
particular can affect door travel.
11. The door reverses for no apparent reason
and opener lights blink for 5 seconds after
reversing:
• Check the safety reversing sensor. Remove any
obstruction or align the receiving eye. See
Installation Step 10.
12. The opener lights don't turn on:
• Replace the light bulbs (75 watts maximum). Use
A19 standard neck garage door opener bulb if
regular bulb burns out.
13. The opener lights don't turn off:
• Is the Light feature on? Turn it off.
14. The opener strains or maximum force is
needed to operate door:
• The door may be out of balance or the springs
may be broken. Close the door and use the
emergency release handle to disconnect the
trolley. Open and close the door manually. A
properly balanced door will stay in any point of
travel while being supported entirely by its springs.
If it does not, disconnect the opener and call a
trained door systems technician. Do not increase
the force to operate the opener.
15. The opener motor hums briefly, then won't
work:
• The garage door springs may be broken. See
above.
• If the problem occurs on the first operation of the
opener, door may be locked. Disable the door lock.
Repeat the safety reverse test after the adjustment is
complete.
16. The opener won't operate due to power
failure:
• Use the emergency release handle to disconnect
the trolley. The door can be opened and closed
manually. When power is restored, press the Door
Control push bar and trolley will automatically
reconnect (unless trolley is in lockout position.)
See page 32.
• The Outside Quick Release accessory (for use on
garages with no service door) disconnects the
trolley from outside the garage in case of power
failure.
17. The chain droops or sags:
• It is normal for the chain to droop slightly in the
closed door position. Use the emergency release
rope and handle to disconnect the trolley. If the
chain returns to the normal height when the trolley
is disengaged, and the door reverses on a 2x4 laid
flat, no adjustments are needed. (See page 11.)

35
*3-Button Remotes
If supplied with your
garage door opener, the
large button is factory
programmed to operate
it. Additional buttons on
any Security✚®3-button
remote or mini-remote
can be programmed to operate other Security✚®
garage door openers.
To Erase All Codes From Motor Unit
Memory
To deactivate any unwanted remote,
first erase all codes:
Press and hold the “learn” button on
motor unit until the learn indicator light
goes out (approximately 6 seconds). All previous codes
are now erased. Reprogram each remote or keyless
entry you wish to use.
1
3
9
7
5
1
3
9
7
5
123
12
1. Press and release the “learn”
button on the motor unit. The
learn indicator light will glow
steadily for 30 seconds.
2. Within 30 seconds, press and
hold the button on the hand-held
remote*that you wish to operate
your garage door.
3. Release the button when the
motor unit lights blink. It has
learned the code. If light bulbs
are not installed, two clicks will be
heard.
To Add or Reprogram an Additional Hand-held Remote Control
USING THE “LEARN” BUTTON
2
1
KG
2
1
KG
PROGRAMMING
Your garage door opener has already been programmed at the factory to operate with your hand-held remote control.
The door will open and close when you press the large push button.
Below are instructions for programming your opener to operate with additional Security✚®remote controls.
NOTICE: If this Security
✚
®garage door opener is operated with a non-rolling code transmitter, the technical measure in
the receiver of the garage door opener, which provides security against code-theft devices, will be circumvented. The
owner of the copyright in the garage door opener does not authorize the purchaser or supplier of the non-rolling code
transmitter to circumvent that technical measure.

36
1. Press and release the “learn”
button on motor unit. The learn
indicator light will glow steadily
for 30 seconds.
2. Within 30 seconds, enter a four
digit personal identification
number (PIN) of your choice on
the keypad. Then press and
hold the ENTER button.
3. Release the button when the
motor unit lights blink. It has
learned the code. If light bulbs
are not installed, two clicks will
be heard.
To Add, Reprogram or Change a Keyless Entry PIN
NOTE: Your new Keyless Entry must be programmed to operate your garage door opener.
USING THE “LEARN” BUTTON
2
1
KG
To change an existing, known PIN
If the existing PIN is known, it may be changed by one
person without using a ladder.
1. Press the four buttons for the present PIN, then press
and hold the # button.
The opener light will blink twice. Release the # button.
2. Press the new 4-digit PIN you have chosen, then
press Enter.
The motor unit lights will blink once when the PIN has
been learned.
Test by pressing the new PIN, then press Enter. The
door should move.
To set a temporary PIN
You may authorize access by visitors or service people
with a temporary 4-digit PIN. After a programmed
number of hours or number of accesses, this temporary
PIN expires and will no longer open the door. It can be
used to close the door even after it has expired. To set a
temporary PIN:
1. Press the four buttons for your personal entry PIN (not
the last temporary PIN), then press and hold the ✽
button.
The opener light will blink three times. Release the
button.
2. Press the temporary 4-digit PIN you have chosen,
then press Enter.
The opener light will blink four times.
3. To set the number of hours this temporary PIN will
work, press the number of hours (up to 255), then
press ✽.
OR
3. To set the number of times this temporary PIN will
work, press the number of times (up to 255), then
press #.
The opener light will blink once when the temporary PIN
has been learned.
Test by pressing the four buttons for the temporary PIN,
then press Enter. The door should move. If the
temporary PIN was set to a certain number of openings,
remember that the test has used up one opening.To
clear the temporary password, repeat steps 1-3, setting
the number of hours or times to 0 in step 3.
One Button Close: Opener can be closed by pressing
only the ENTER button if the one button close feature
has been activated. This feature has been activated at
the factory. To activate or deactivate this feature press
and hold buttons 1 and 9 for 10 seconds. The keypad
will blink twice when the one button close is active. The
keypad will blink four times when one button close is
deactivated.
KG KG
1
3
9
7
5
1
3
9
7
5
123
12

37
7
UP
CEILING MOUNT ONLY
11
10
NOTICE
5 6
8
1 4
9
12
3
2
Installation Parts
REPAIR PARTS
KEY PART
NO. NO. DESCRIPTION
1 41A4166 Door control button
2 371LM Single-button remote control
3 10A20 3V2032 Lithium battery
4 29B137 Transmitter visor clip
5 41A2828 Emergency release rope & handle
assembly
6 41B4494-1 2-conductor bell wire – white &
white/red
7 41A4353 Header bracket w/clevis pin & fastener
8 41A5047 Door bracket w/clevis pin & fastener
9 41A5034 Safety sensor kit (receiving and
sending eyes) with 3' (.9 m)
2-conductor bell wire attached
10 178B34 Straight door arm section
11 178B35 Curved door arm section
12 41A5266-1 Safety sensor brackets (2)
NOT SHOWN
41A2770-6 Installation hardware bag
(see page 7).
114A3587 Owner’s manual
114A3587SP Owner’s manual - Spanish
1
34
5
6
2
Rail Assembly Parts
KEY PART
NO. NO. DESCRIPTION
1 4A1008 Master link kit
2 41A4813 Chain pulley bracket
3 41A3489 Complete trolley assembly
4 1707LM 7 foot (2.1 m) complete rail
1708LM 8 foot (2.4 m) complete rail
1710LM 10 foot (3 m) complete rail
5 41D3484 Full chain assembly
6 83A11 Rail grease

38
Motor Unit Assembly Parts
2
1
2A
10
8
13
14
15
16
19
4
3
DN
UP
Brown
Wire
(Down)
Contact
LIMIT SWITCH ASSY.
Grey
Wire
Yellow
Wire
(Up)
Contact
Center Limit
Contact
Drive
Gear
9
20
16
12
18
11
17 3
1A
567
KEY PART
NO. NO. DESCRIPTION
1 41A4208-2 Chain spreader w/screws
(1356M, 1346M)
1A 31D380 Sprocket cover (1355M, 1345M)
2 41C4206 Gear and sprocket assy.
(1356M, 1346M)
2A 41C4220A Gear and sprocket assy. (1355M,
1345M) Complete with:
Spring washer, Thrust washer,
Retaining ring, Bearing plate, Roll
pins (2), Drive gear and worm gear,
Helical gear w/retainer and grease
3 41A2817 Drive/worm gear kit w/grease,
Roll pins (2)
4 41B4245 Line cord
5 143D100 End panel w/all labels
6 175B88 Light socket
7 108D36-2 Lens
8 30B532 Capacitor - 1/2HP
30B533 Capacitor - 1/3HP
9 12A373 Capacitor bracket
10 41A3150 Terminal block w/screws
KEY PART
NO. NO. DESCRIPTION
11 41D3058 Universal replacement motor &
bracket assy. Complete with:
Motor, worm, bracket, bearing
assembly, RPM sensor.
12 41A3583-11 Cover 1/2HP (1356M, 1355M)
41A3583-15 Cover 1/3HP (1346M, 1345M)
13 41A2818 Helical gear & retainer
w/grease
14 41D3452 Limit switch assembly
15 41C4398A RPM sensor assembly
16 41C4246 Wire harness assy. w/plug
17 41A2826 Shaft bearing kit
18 41A2822A Interrupter cup assy.
19 41A5021-1M-315 Receiver logic board assy.
Complete with: Logic board,
End panel w/all labels, Light
socket
20 41A5014-3 End panel w/all labels
NOT SHOWN
41A2825 Opener assy. hardware kit
(includes screws not designated
by a number in illustration).

39
ACCESSORIES
CLOSED
OPEN
LOCK
LIGHT
374LM
370LM
915LM
395LM
990LM
1702LM Outside Quick Release:
Required for a garage with NO access
door. Enables homeowner to open
garage door manually from outside by
disengaging trolley.
Remote Light Control:
Enables homeowner to turn on a lamp,
television or other appliance from car,
bedside, or anywhere in the home with a
remote.
SECURITY✚®3-Button Remote
Control:
Includes visor clip.
SECURITY✚®4-Button Remote
Control:
Includes visor clip.
Wireless Door Control:
Push bar, light feature and auxiliary
button. Includes battery.
377LM
Extension Brackets:
(Optional) For safety sensor installation
onto the wall or floor.
373P
SECURITY✚®Keyless Entry:
Enables homeowner to operate garage
door opener from outside by entering a
password on a specially designed
keyboard. Also can add a temporary
password for visitors or service persons.
This temporary password can be limited
to a programmable number of hours or
entries.
378LM
SECURITY✚®3-Button Mini Remote
Control:
With key ring and fastening strip.
Surge Protector:
The Garage Door Opener Surge
Protector is designed to protect
LiftMaster®garage door openers against
damage from lightning and power
surges.
975LM Laser Park Assist:
Laser enables homeowners to precisely
park vehicles in the garage.
Garage Door Monitor:
Security for the largest door of your
home!
Tells you if your garage door is open or
closed. Monitors up to 4 garage doors
by adding additional sensor modules.
41A5281
Designer Burled Walnut 3-Button
Remote Control with Security✚®:
Includes visor clip.
373W

© 2008, The Chamberlain Group, Inc.
114A3587 All Rights Reserved
LIFTMASTER®SERVICE IS
ON CALL
OUR LARGE SERVICE ORGANIZATION
SPANS AMERICA
INSTALLATION AND SERVICE INFORMATION IS AS NEAR
AS YOUR TELEPHONE. SIMPLY DIAL OUR TOLL FREE
NUMBER:
1-800-528-9131
www.liftmaster.com
For professional installation, parts and service, contact
your local LIFTMASTER/CHAMBERLAIN dealer. Look for
him in the Yellow Pages, or call our Service number for a
list of dealers in your area.
HOW TO ORDER
REPAIR PARTS
Selling prices will be furnished on request or parts will be
shipped at prevailing prices and you will be billed
accordingly.
WHEN ORDERING REPAIR PARTS, ALWAYS GIVE THE
FOLLOWING INFORMATION:
• PART NUMBER
• PART NAME
• MODEL NUMBER
ADDRESS ORDERS TO:
THE CHAMBERLAIN GROUP, INC.
Technical Support Group
6050 S. Country Club Road
Tucson, Arizona 85706
SERVICE INFORMATION
TOLL FREE NUMBER:
1-800-528-9131
LIFTMASTER ONE YEAR LIMITED WARRANTY
48 MONTHS (4 YEARS) & 24 MONTHS (2 YEARS) MOTOR LIMITED WARRANTY
The Chamberlain Group, Inc. (“Seller”) warrants to the first retail purchaser of this product, for the residence in which this product is originally
installed, that it is free from defect in materials and/or workmanship for a period of one year from the date of purchase [and that the motor is free
from defect in materials and/or workmanship for a period of 48 months (4years) for models 1356M & 1355M and 24 months (2 years) for models
1346M & 1345M from the date of purchase]. The proper operation of this product is dependent on your compliance with the instructions regarding
installation, operation, maintenance and testing. Failure to comply strictly with those instructions will void this limited warranty in its entirety.
If, during the limited warranty period, this product appears to contain a defect covered by this limited warranty, call 1-800-528-9131, toll free,
before dismantling this product. Then send this product, pre-paid and insured, to our service center for warranty repair. You will be advised of
shipping instructions when you call. Please include a brief description of the problem and a dated proof-of-purchase receipt with any product
returned for warranty repair. Products returned to Seller for warranty repair, which upon receipt by Seller are confirmed to be defective and
covered by this limited warranty, will be repaired or replaced (at Seller’s sole option) at no cost to you and returned pre-paid. Defective parts will
be repaired or replaced with new or factory-rebuilt parts at Seller’s sole option.
ALL IMPLIED WARRANTIES FOR THE PRODUCT, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO THE ONE YEAR LIMITED
WARRANTY PERIOD SET FORTH ABOVE [EXCEPT THE IMPLIED WARRANTIES WITH RESPECT TO THE MOTOR, WHICH ARE LIMITED
IN DURATION TO THE 48 MONTHS (4 YEARS) FOR MODELS 1356M & 1355M AND 24 MONTHS (2 YEARS) FOR MODELS 1346M & 1345M
LIMITED WARRANTY PERIOD FOR THE MOTOR], AND NO IMPLIED WARRANTIES WILL EXIST OR APPLY AFTER SUCH PERIOD. Some
States do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you. THIS LIMITED
WARRANTY DOES NOT COVER NON-DEFECT DAMAGE, DAMAGE CAUSED BY IMPROPER INSTALLATION, OPERATION OR CARE
(INCLUDING, BUT NOT LIMITED TO ABUSE, MISUSE, FAILURE TO PROVIDE REASONABLE AND NECESSARY MAINTENANCE,
UNAUTHORIZED REPAIRS OR ANY ALTERATIONS TO THIS PRODUCT), LABOR CHARGES FOR REINSTALLING A REPAIRED OR
REPLACED UNIT, REPLACEMENT OF BATTERIES AND LIGHT BULBS OR UNITS INSTALLED FOR NON-RESIDENTIAL USE.
THIS LIMITED WARRANTY DOES NOT COVER ANY PROBLEMS WITH, OR RELATING TO, THE GARAGE DOOR OR GARAGE DOOR
HARDWARE, INCLUDING BUT NOT LIMITED TO THE DOOR SPRINGS, DOOR ROLLERS, DOOR ALIGNMENT OR HINGES. THIS LIMITED
WARRANTY ALSO DOES NOT COVER ANY PROBLEMS CAUSED BY INTERFERENCE. ANY SERVICE CALL THAT DETERMINES THE
PROBLEM HAS BEEN CAUSED BY ANY OF THESE ITEMS COULD RESULT IN A FEE TO YOU.
UNDER NO CIRCUMSTANCES SHALL SELLER BE LIABLE FOR CONSEQUENTIAL, INCIDENTAL OR SPECIAL DAMAGES ARISING IN
CONNECTION WITH USE, OR INABILITY TO USE, THIS PRODUCT. IN NO EVENT SHALL SELLER’S LIABILITY FOR BREACH OF
WARRANTY, BREACH OF CONTRACT, NEGLIGENCE OR STRICT LIABILITY EXCEED THE COST OF THE PRODUCT COVERED HEREBY.
NO PERSON IS AUTHORIZED TO ASSUME FOR US ANY OTHER LIABILITY IN CONNECTION WITH THE SALE OF THIS PRODUCT.
Some States do not allow the exclusion or limitation of consequential, incidental or special damages, so the above limitation or exclusion may
not apply to you. This limited warranty gives you specific legal rights, and you may also have other rights which vary from state to state.