Chamberlain LiftMaster 1255LMC-R User manual

GARAGE DOOR OPENER
Models 1255LMC-R – 1/2 HP
1245LMC-R – 1/3 HP
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.
The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60 26- 96
www.liftmaster.com
®

2
Introduction 2-5
Safety symbol and signal word review........................2
Preparing your garage door ........................................3
Tools needed ...............................................................3
Planning .....................................................................4
Carton inventory ..........................................................5
Hardware inventory .....................................................5
Assembly 6-7
Attach the rail to the motor unit...................................6
Attach the chain to the sprocket and install
the sprocket cover.......................................................6
Tighten the chain.........................................................7
Installation 7-23
Installation safety instructions .....................................7
Determine the header bracket location....................8-9
Install the header bracket.......................................... 0
Attach the rail to the header bracket .........................
Position the opener ................................................... 2
Hang the opener ....................................................... 3
Install the door control............................................... 4
Install the light and lens ............................................ 5
Attach the emergency release rope and handle ....... 5
Electrical requirements.............................................. 6
Install the Protector System®................................ 7- 9
Fasten the door bracket .......................................20-2
Connect the door arm to the trolley .....................22-23
Adjustment 24-26
Adjust the travel limits ...............................................24
Adjust the force .........................................................25
Test the safety reversal system.................................26
Test the Protector System®........................................26
Operation 27-30
Operation safety instructions.....................................27
Using your garage door opener ................................27
Using the wall-mounted door control ........................28
To open the door manually........................................28
Care of your garage door opener..............................29
Having a problem?...............................................29-30
Programming 31-32
To add a hand-held remote control ...........................3
To erase all codes .....................................................3
3-channel remotes.....................................................3
To add or change a Keyless Entry PIN .....................32
Repair Parts 33-34
Rail assembly parts...................................................33
Installation parts ........................................................33
Motor unit assembly parts .........................................34
Accessories 35
Repair Parts and Service 36
Warranty 36
TABLE OF CONTENTS
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
CAUTION WARNING
WARNING
WARNING
CAUTION WARNING
WARNING
WARNING
CAUTION
WARNING
WARNING

3
To prevent damage to garage door and opener:
• ALWAYS disable locks BEFORE installing and operating
t e 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 tec nician if
garage door binds, sticks, or is out of balance. An
unbalanced garage door may not reverse w en
required.
• NEVER try to loosen, move or adjust garage door, door
springs, cables, pulleys, brackets or t eir ardware, all
of w ic 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:
. 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
CAUTION WARNING
WARNING
WARNING
CAUTION
WARNING
WARNING
Pliers
Wire Cutters
Claw Hammer
Hack Saw
Screwdriver Adjustable End Wrench
/2" and 7/ 6" Sockets
and Wrench
Drill
Tape Measure
2
Stepladder
Pencil
3/ 6", 5/ 6" and
5/32" Drill Bits
Carpenter's
Level
Sectional Door
One-Piece Door

Safety Reversing Sensor
Horizontal and vertical reinforcement
is needed for lightweight garage doors
(fiberglass, steel, aluminum,
door with glass panels, etc.).
See page 20 for details.
FINISHED CEILING
Support bracket &
fastening hardware
is required.
See page 3.
Motor Unit
— — — — — — — —
Door
Center
Header Wall
Safety
Reversing
Sensor
Gap between floor and bottom of door
must not exceed /4"
Extension Spring
Torsion Spring
Access Door
OR
Slack in chain tension
is normal when
garage door is closed.
Wall-
mounted
Door
Control
4
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.
FINISHED CEILING
Support bracket
& fastening
hardware is required.
See page 3.
Slack in chain tension
is normal when
garage door is closed.
Safety
Reversing Sensor
Header
Wall
Access
Door
Safety Reversing Sensor
Gap between floor and bottom of
door must not exceed /4"
Wall-
mounted
Door
Control
Motor Unit
ONE-PIECE DOOR WITHOUT TRACK
Access
Door
Gap between floor
and bottom of door
must not exceed /4"
Safety
Reversing Sensor
Safety
Reversing
Sensor
Slack in chain tension is normal
when garage door is closed
ONE-PIECE DOOR WITH TRACK

5
SECURITY✚
Single-Function Remote Control ( )
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
Light Lens ( )
Remote Control
Visor Clip
Door Bracket
Door Control Button
(2) Safety Reversing Sensors
( Sending Eye and Receiving Eye)
with
2-Conductor White & White/Black Bell Wire
attached
Safety Sensor
Bracket (2)
One-Piece
Rail
Styrofoam
Chain
Pulley Bracket
Trolley
Chain
Carton Inventory
INSTALLATION HARDWARE
Hex Screw 5/ 6"- 8x7/8" (4)
Lag Screw 5/ 6"-9x -5/8" (2)
Lag Screw 5/ 6"- 8x -7/8" (2)
Clevis Pin 5/ 6"x2-3/4" ( )
Clevis Pin 5/ 6"x - /4" ( )
Clevis Pin 5/ 6"x " ( )
Nut 5/ 6"- 8 (4)
Lock Washer 5/ 6" (4)
Self-Threading Screw /4”- 4X5/8” (2)
Insulated Staples (30)
Ring Fastener (3)
Dry Wall Anchors (2)
Rope
Handle
Rail Grease
Carriage Bolt /4"-20x /2" (2)
Wing Nut /4"-20 (2)
Your garage door opener is packaged in two cartons
which contain the motor unit and all parts illustrated
below. 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 installation is also listed below.

6
ASSEMBLY STEP 1
Attach the Rail to the Motor Unit
To avoid installation difficulties, do not run the
garage door opener until instructed to do so.
• Remove the two washered bolts mounted in top of
motor unit.
• Position rail at a 45oangle 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/ 6"- 8x /2"
Styrofoam
Rail
Hole
USE ONLY THIS
TYPE AND SIZE
BOLT
To avoid possible SERIOUS INJURY to fingers from
moving garage door opener:
• ALWAYS keep and clear of sprocket w ile operating
opener.
• Securely attac sprocket cover before operating.
Washered Bolt
5/ 6"- 8x /2" Motor Unit
Sprocket
USE ONLY THIS
TYPE AND SIZE
BOLT
Sprocket Cover
Mounting
Plate
Front Tab Slot
Back Tab Slot
WARNING
CAUTION WARNING
WARNING
To avoid SERIOUS damage to garage door opener,
use ONLY t ose bolts/fasteners mounted in t e top of
t e opener.
WARNING
CAUTION
WARNING
WARNING
ASSEMBLY STEP 2
Attach the Chain to the Sprocket
and Install the Sprocket Cover
• 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 bolts 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.

7
ASSEMBLY STEP 5
Tighten the Chain
• 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 /2" 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, ALWAY 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
/2 Inch
To Tighten
Inner Nut
Outer Nut
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 w en required and could result in
SEVERE INJURY or DEATH.
3. All repairs to cables, spring assemblies and ot er
ardware MUST be made by a trained door systems
tec nician 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 or more above floor.
6. Mount emergency release andle 6 feet above floor.
7. NEVER connect garage door opener to power source
until instructed to do so.
8. NEVER wear watc es, rings or loose clot ing w ile
installing or servicing opener. T ey could be caug t in
garage door or opener mec anisms.
9. Install wall-mounted garage door control:
• wit in sig t of t e garage door
• out of reac of c ildren at minimum eig t of 5 feet
• away from all moving parts of t e 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 wit a one-
inc ig object (or a 2x4 laid flat) on t e floor.
To reduce the risk of severe injury or death:
WARNING
CAUTION WARNING
WARNING
INSTALLATION

8
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
. 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
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".)
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 0.
3. Open your door to the highest point of travel as
shown. Draw an intersecting horizontal line on the
header wall 2" above the high point. This height
will provide travel clearance for the top edge of the
door.
Proceed to Step 2, page 10. One-piece
door with
horizontal
track
To prevent possible SERIOUS INJURY or DEATH:
• Header bracket MUST be RIGIDLY fastened to
structural support on eader wall or ceiling, ot erwise
garage door mig t not reverse w en required. DO NOT
install eader bracket over drywall.
• Concrete anc ors MUST be used if mounting eader
bracket or 2x4 into masonry.
• NEVER try to loosen, move or adjust garage door,
springs, cables, pulleys, brackets, or t eir ardware, all
of w ic are under EXTREME tension.
• ALWAYS call a trained door systems tec nician if
garage door binds, sticks, or is out of balance. An
unbalanced garage door mig t not reverse w en
required.
Header Wall
Ceiling
Track
Highest Point
of Travel
Door
2"
Sectional door
with curved
track
Door
Track
Header Wall
Highest Point
of Travel
2"
Finished
Ceiling
Vertical
Centerline
Header
Wall 2x4 Structural
Supports
Vertical
Centerline
WARNING
CAUTION WARNING
WARNING

9
Header Wall Vertical
Centerline
Vertical
Centerline
of Garage
Door
2x4
Unfinished
Ceiling
2x4
OPTIONAL
CEILING MOUNT
FOR
HEADER BRACKET
Structural
Supports
ONE-PIECE DOOR WITHOUT TRACK
. 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 0.
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" 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 10 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"
Actual height of door .......................................... -88"
Remainder.......................................................... 4"
Add..................................................................... +8"
Bracket height on header wall............................ = 2"
(Measure UP from top of CLOSED door.)
Proceed to Step 2, page 10.

0
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/ 6"
pilot holes and fasten the bracket securely to a
structural support with the hardware provided.
Lag Screw
5/ 6"-9 x -5/8"
HARDWARE SHOWN ACTUAL SIZE
Lag Screws
5/ 6"-9x -5/8"
Highest Point of
Garage Door Travel
Vertical
Centerline
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 bracket.
UP
CEILING MOUNT ONLY
Door Spring
Header
Bracket
2x4
Structural
Support
Vertical
Centerline
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/ 6"-9x -5/8"
Garage Door
Vertical Centerline
Header Wall
– Finished Ceiling –
Header
Bracket
6" Maximum
Vertical
Centerline
Door
Spring
CEILING HEADER BRACKET INSTALLATION
• Extend the vertical centerline onto the ceiling as
shown.
• Center the bracket on the vertical mark, no more
than 6" 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/ 6" pilot holes and
fasten bracket securely to a structural support with
the hardware provided.

11
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 belo 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 ith a clevis pin
as sho n.
• 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

12
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 ith the top of
the motor unit. Do not position the opener more
than 2" above this point.
INSTALLATION STEP 4
Position the Opener
Follo instructions hich 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 ill need
help at this point if the ladder is not tall enough.
• Open the door all the ay and place a 2x4 laid flat
on the top section beneath the rail.
• If the top section or panel hits the trolley hen you
raise the door, pull do n on the trolley release arm
to disconnect inner and outer sections. Slide the
outer trolley to ard the motor unit. The trolley can
remain disconnected until Installation Step 12
is completed.
2x4
laid flat
Rail
Door
Trolley
Release Arm
ENGAGED RELEASED
To prevent damage to garage door, rest garage door
opener rail on 2x4 placed on top section of door.
WARNING
CAUTION
WARNING
WARNING
Top of Opener
Header
Bracket
Top of door

13
INSTALLATION STEP 5
Hang the Opener
T o representative installations are sho n. Yours
may be different. Hanging brackets should be angled
(Figure 1) to provide rigid support. On finished
ceilings (Figure 2), attach a sturdy metal bracket to
structural supports before installing the opener. This
bracket and fastening hard are 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 ith
5/16"-18x1-7/8" lag scre s.
5. Fasten the opener to the hanging brackets ith
5/16"-18x7/8" hex bolts, lock ashers and nuts.
6. Check to make sure the rail is centered over the
door (or in line ith 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
here the trolley slides ith rail grease.
To avoid possible SERIOUS IN URY 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.
Lag Scre 5/16"-18x1-7/8"
Hex Bolt
5/16"-18x7/8" Nut 5/16"-18 Lock Washer 5/16"
HARDWARE SHOWN ACTUAL SIZE
Measure
Distance
Lag Scre s
5/16"-18x1-7/8"
Structural
Supports
Bracket
(Not Provided)
Lag Scre s
5/16"-18x1-7/8"
— FINISHED CEILING —
Hidden
Support
(Not Provided)
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
Bolt 5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18
Figure 1
Figure 2
WARNING
CAUTION WARNING
WARNING

14
To prevent possible SERIOUS IN URY 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 IN URY 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, 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.
WARNING
CAUTION
WARNING
WARNING
Dry Wall Anchors Insulated
Staples
Scre 6ABx1-1/2"
Lighted Door Control Button
INSTALLATION STEP 6
Install the Door Control
Locate the door control ithin sight of the door at a
minimum height of 5 feet here small children
cannot reach, and a ay from all moving parts of the
door and door hard are.
1. Strip 1/4" of insulation from one end of the bell
ire. Connect it to the t o scre terminals on the
back of the door control by color: hite ire to 2
and hite/red ire to 1.
2. Fasten the Lighted Door Control Button securely
ith 6ABx1-1/2" scre s. If installing into dry all,
drill 5/32" holes and use the anchors provided.
3. Run the bell ire up the all and across the
ceiling to the opener. Use insulated staples to
secure the ire in several places. Do not pierce
ire ith a staple, creating a short or open circuit.
4. Receiver terminal scre s and the antenna are
located on the back panel of the opener. Position
the antenna ire as sho n.
5. Connect the bell ire to the opener terminal
scre s: hite to 2 and hite/red to 1.
6. Use tacks or staples to permanently attach the
entrapment arning label to the all 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 eversing Sensor instructions
beginning on page 17.
Opener
Terminal Scre s
Bell Wire
Antenna
BACK PANEL
Lighted Door
Control Button
Terminal Scre s
Bell Wire
WHT
RED
KG KG
1
3
9
5
1
3
9
5
23
1
-2
-1
Lighted
Door Control Button
HARDWARE SHOWN ACTUAL SIZE

15
INSTALLATION STEP 7
Install the Light and Lens
INSTALL THE LIGHT
• Install a 75 att maximum light bulb in the socket.
The light ill turn ON and remain lit for
approximately 4-1/2 minutes hen po er is
connected. Then the light ill turn OFF.
• If the bulb burns out prematurely due to vibration,
replace ith a Garage Door Opener bulb.
INSTALL THE LENS
• Locate and loosen (approximately 1/8") the t o
scre s near top of opener front panel. Position lens
against panel ith slotted tabs directly belo
scre s. Slide lens up to seat tabs behind scre s.
Snap bottom tabs of lens into panel slots. Retighten
top panel scre s 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 sho n. Secure ith an overhand knot at
least 1" 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 above
the floor. Secure ith 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 IN URY 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 Scre
Trolley
NOTICE
Overhand
Knot
Emergency
Release Handle
Rope
Trolley
Release Arm
WARNING
CAUTION WARNING
WARNING

16
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 ith a third
grounding pin. This plug ill 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 scre s and set the
cover aside.
• Remove the attached 3-prong cord.
• Connect the black (line) ire to the scre on the
brass terminal; the hite (neutral) ire to the
scre on the silver terminal; and the ground ire
to the green ground scre . 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 IN URY 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 Scre
Ground Wire
Black Wire
PERMANENT WIRING
CONNECTION
White Wire
Black
Wire
WARNING
CAUTION WARNING
WARNING

17
Invisible Light Beam
Protection Area
Sensor Beam
6" max.
above floor
Sensor Beam
6" 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
ill detect an obstacle in the path of its electronic
beam. The sending eye ( ith an orange indicator
light) transmits an invisible light beam to the
receiving eye ( ith a green indicator light). If an
obstruction breaks the light beam hile the door is
closing, the door ill stop and reverse to full open
position, and the opener lights ill 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" 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 ithout additional
hard are.
If it is necessary to mount the units on the all, the
brackets must be securely fastened to a solid
surface such as the all framing. Extension brackets
(see accessories) are available if needed. If
installing in masonry construction, add a piece of
ood 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 hard are) may interrupt the
beam hile the door is closing.
• Be sure power is not connected to the garage door
opener BEFORE installing the safety reversing sensor.
• To prevent SERIOUS IN URY 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" above garage floor.
WARNING
CAUTION WARNING
WARNING

18
FLOOR MOUNT (RIGHT SIDE)
WALL MOUNT (RIGHT SIDE)
DOOR TRACK MOUNT (RIGHT SIDE)
Indicator
light
Lens
Lip
Sensor
Bracket
Door
Track
Sensor
Bracket
Extension
Bracket
(See Accessories)
Lens
Indicator
light
Attach ith
concrete anchors
(not provided)
Inside
Garage
Wall
Indicator
light
Sensor
Bracket
Lens
Extension
Bracket
(See Accessories)
Inside
Garage
Wall
(Provided ith
Extension
Bracket)
(Provided ith
Extension Bracket)
(Provided ith
Extension
Bracket)
(Provided ith
Extension Bracket)
Figure 3
Figure 1
Figure 2
INSTALLING THE BRACKETS
Be sure power to the opener is disconnected.
Install and align the brackets so the sensors ill face
each other across the garage door, ith the beam no
higher than 6" above the floor. They may be installed
in one of three ays, as follo s.
Garage door track installation (preferred):
• Slip the curved arms over the rounded edge of
each door track, ith the curved arms facing the
door. Snap into place against the side of the track.
It should lie flush, ith the lip hugging the back
edge of the track, as sho n in Figure 1.
If your door track ill not support the bracket
securely, all installation is recommended.
Wall installation:
• Place the bracket against the all ith 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 ood blocks can be used.
• Use bracket mounting holes as a template to
locate and drill (2) 3/16" diameter pilot holes on
the all at each side of the door, no higher than 6"
above the floor.
• Attach brackets to all ith lag scre s
(not provided).
• If using extension brackets or ood blocks, adjust
right and left assemblies to the same distance out
from the mounting surface. Make sure all door
hard are obstructions are cleared.
Floor installation:
• Use ood blocks or extension brackets (see
Accessories) to elevate sensor brackets so the
lenses ill be no higher than 6" above the floor.
• Carefully measure and place right and left
assemblies at the same distance out from the all.
Be sure all door hard are obstructions are
cleared.
• Fasten to the floor ith concrete anchors as
sho n.
Wing Nut
1/4"-20 Staples
Carriage Bolt
1/4"-20x1/2"
HARDWARE SHOWN ACTUAL SIZE

19
Carriage bolt
1/4"-20x1/2" Lens
Wing nut
Figure 4MOUNTING AND WIRING THE SAFETY SENSORS
• Slide a 1/4"-20x1/2" carriage bolt head into the slot
on each sensor. Use ing nuts to fasten sensors to
brackets, ith lenses pointing to ard each other
across the door. Be sure the lens is not obstructed
by a bracket extension (Figure 4).
• Finger tighten the ing nuts.
•Run the ires from both sensors to the opener. Use
insulated staples to secure ire to all and ceiling.
• Strip 1/4" of insulation from each set of ires.
Separate hite and hite/black ires sufficiently to
connect to the opener terminal scre s: hite to 2
and hite/black to 3 (Figure 5).
ALIGNING THE SAFETY SENSORS
•Plug in the opener. The indicator lights in both the
sending and receiving eyes ill glow steadily if
iring connections and alignment are correct.
The sending eye orange indicator light ill glo
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 ing nut and readjust,
aiming directly at the receiving eye. Lock in place.
• Loosen the receiving eye ing nut and adjust
sensor until it receives the sender’s beam. When
the green indicator light glo s steadily, tighten the
ing nut.
TROUBLESHOOTING THE SAFETY SENSORS
1. If the sending eye indicator light does not glo
steadily after installation, check for:
• Electric po er to the opener.
• A short in the hite or hite/black ires. These
can occur at staples, or at terminal connections.
• Incorrect iring bet een sensors and opener.
• A broken ire.
2. If the sending eye indicator light glo s steadily but
the receiving eye indicator light doesn't:
• Check alignment.
• Check for an open ire 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 17.
Invisible Light Beam
Protection Area
Sensor
Sensor
Connect Wire to
Opener Terminal scre s
Bell Wire
Finished Ceiling
OPENER TERMINAL SCREWS
Sensor
Connections
Door Control
Connections
(dotted line)
123
Bell Wire
Figure 5

20
INSTALLATION STEP 11
Fasten the Door Bracket
Follo instructions hich apply to your door type
as illustrated belo or on the follo ing 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 sho s 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 ith 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" belo
the top edge of the door, OR directly belo any
structural support across the top of the door.
3. Mark, drill holes and install as follo s, depending
on your door’s construction:
Metal or light weight doors using a vertical angle
iron race etween the door panel support and
the door racket:
• Drill 3/16" fastening holes. Secure the door bracket
using the t o 1/4"-14x5/8" self-threading scre s.
(Figure 2A)
• Alternately, use t o 5/16" bolts, lock ashers 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 scre s (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 ith 5/16"x2" carriage bolts, lock
ashers 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.
WARNING
CAUTION
WARNING
WARNING
Vertical
Centerline
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
UP
Vertical
Reinforcement
Self-Threading
Scre
1/4"-14x5/8"
Door
Bracket
Nut
5/16"-18
Bolt
5/16"-18x2"
Lock Washer
5/16"
Vertical
Centerline
UP
Vertical
Reinforcement
(Not Provided)
UP
Vertical
Centerline
Self-Threading
Scre
1/4"-14x5/8"
UP
Inside Edge
of Door or
Reinforcement Board
Bolt
5/16"x2"
Vertical
Centerline
(Not Provided)
Figure 1
Figure 2A
Figure 2B
Figure 3
Figure 4
Self-Threading
Scre
1/4"-14x5/8"
HARDWARE
SHOWN
ACTUAL SIZE