The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
®
®
GARAGE DOOR OPENER
Models 1255-2R 1/2HP
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.
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Preparing your garage door
WARNING
Before you begin:
To prevent possible SERIOUS INJURY OR DEATH:
• Disable locks.
• 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.
• 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.
CAUTION
To prevent damage to garage door and opener:
• ALWAYS disable locks BEFORE installing and operating
the opener.
• ONLY operate garage door opener at 120V, 60 Hz to
avoid malfunction and damage.
Sectional Door
Tools needed
One-Piece Door
During assembly, installation and adjustment of the
opener, instructions will call for hand tools as
illustrated below.
Pencil
Carpenter's
Level (Optional)
2
1
Hack Saw
Tape Measure
Wire Cutters
Drill
Claw Hammer
Pliers
3/16", 5/16" and
5/32" Drill Bits
1/2" and 7/16" Sockets
and Wrench
Stepladder
Screwdriver
Adjustable End Wrench
3
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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.
SECTIONAL DOOR INSTALLATION
FINISHED CEILING
Support bracket &
fastening hardware
is required.
See page 12.
Horizontal and vertical reinforcement
Slack in chain tension
is normal when
garage door is closed
is needed for lightweight garage doors
(fiberglass, steel, aluminum, door with
glass panels, etc.). See page 19 for details.
Header Wall
Motor unit
Extension
Spring
OR
Torsion
Spring
Wall-
mounted
Door
Access
Door
Control
Vertical
Centerline of
Garage Door
Safety
Gap between floor
and bottom of door
Reversing
Sensor
Safety Reversing Sensor
must not exceed 1/4" (6 mm)
ONE-PIECE DOOR WITHOUT TRACK
FINISHED CEILING
Support bracket
& fastening
hardware is required.
See page 12.
Slack in chain tension
is normal when
garage door is closed.
Header
Wall
Motor Unit
ONE-PIECE DOOR WITH TRACK
Wall-mounted
Door Control
Slack in chain tension is normal when
garage door is closed.
Access
Door
Access
Door
Safety Reversing
Gap between floor
and bottom of door
Sensor
must not exceed 1/4" (6 mm)
Safety Reversing
Sensor
Safety Reversing
Sensor
Gap between floor
and bottom of door
Safety
Reversing Sensor
must not exceed 1/4" (6 mm).
4
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Carton Inventory
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.
Remote Control
Visor Clip
Sprocket Cover
SECURITY✚®
Single Button Remote Control
Door Control Button
(2)
Styrofoam
Chain
Door Bracket
Motor Unit with Light lens
2 Conductor Bell Wire
White & White/Red
One-Piece
Rail
Curved Door
Arm Section
Y
L
N
O
T
N
U
O
M
G
N
I
IL
E
C
P
U
Trolley
Header Bracket
Chain
Pulley Bracket
Safety Labels
and
Literature
(2) Safety Reversing Sensors
(1 Sending Eye and 1 Receiving Eye)
with
2-Conductor White & White/Black Bell Wire
attached
Safety Sensor
Bracket (2)
Straight Door
Arm Section
INSTALLATION HARDWARE
Hex Bolt 5/16"-18x7/8" (4)
Lag Screw 5/16"-9x1-5/8" (2)
Lag Screw 5/16"-18x1-7/8" (2)
Clevis Pin 5/16"x2-3/4" (1)
Clevis Pin 5/16"x1-1/4" (1)
Clevis Pin 5/16"x1" (1)
Insulated Staples (30)
Ring Fastener (3)
Drywall Anchors (2)
Rail Grease
Carriage Bolt 1/4"-20x1/2" (2)
Wing Nut 1/4"-20 (2)
Rope
Nut 5/16"-18 (4)
Lock Washer 5/16" (4)
Handle
Screw 6ABx1-1/4" (2)
Screw 6-32x1" (2)
Self-Threading Screw 1/4"-14x5/8" (2)
5
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CAUTION
To avoid SERIOUS damage to garage door opener,
use ONLY those bolts/fasteners mounted in the top of
the opener.
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 45˚ angle to opener so one hole
in rail and motor unit line up.
Washered Bolt
5/16"-18x1/2"
USE ONLY THIS
TYPE AND SIZE
BOLT
• Thread one of the washered bolts part way in.
Styrofoam
Use only these bolts! Use of any other bolts will
cause serious damage to door opener.
Rail
Hole
• Align rail and styrofoam over sprocket. Cut tape
from rail, chain and styrofoam.
• REMOVE STYROFOAM.
ASSEMBLY STEP 2
Attach the Chain to the Sprocket
and Install the Sprocket Cover
WARNING
To avoid possible SERIOUS INJURY to fingers from
moving garage door opener:
• ALWAYS keep hand clear of sprocket while operating
opener.
• Securely attach sprocket cover BEFORE operating.
• 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!
Washered Bolt
Motor Unit
5/16"-18x1/2"
Sprocket
USE ONLY THIS
TYPE AND SIZE
BOLT
• 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.
Sprocket Cover
Back Tab Slot
Front Tab Slot
Mounting
Plate
6
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Figure 1
ASSEMBLY STEP 3
Tighten the Chain
Lock
Washer
Outer Nut
Inner Nut
To Tighten Outer Nut
• Spin the inner nut and lock washer down the
trolley threaded shaft, away from the trolley.
To Tighten
Inner Nut
• To tighten the chain, turn outer nut in the direction
shown (Figure 1).
• 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.
Trolley
Figure 2
Sprocket noise can result if chain is too loose.
Chain
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 in Figure 2
when the door is open, do not re-adjust the chain.
1/2" (13 mm)
NOTE: During future maintenance, ALWAYS pull the
emergency release handle to disconnect trolley
before adjusting chain.
Base of Rail
Mid Length of Rail
NOTE: You may notice loosening of chain after
Adjustment Step 3 (Test the Safety Reversal
System). Check for proper tension and readjust
chain if necessary. Then repeat Adjustment Step 3.
You have now finished assembling your garage
door opener. Please read the following warnings
before proceeding to the installation section.
INSTALLATION
IMPORTANT INSTALLATION INSTRUCTIONS
WARNING
To reduce the risk of SEVERE INJURY or DEATH:
1. READ AND FOLLOW ALL INSTALLATION WARNINGS
AND INSTRUCTIONS.
2. Install garage door opener only on properly balanced
and lubricated garage door. An improperly balanced
door may not reverse when required and could result in
SEVERE INJURY or DEATH.
3. All repairs to cables, spring assemblies and other
hardware MUST be made by a trained door systems
technician BEFORE installing opener.
4. Disable all locks and remove all ropes connected to
garage door BEFORE installing opener to avoid
entanglement.
5. Install garage door opener 7 feet (2.13 m) or more
above floor.
6. Mount emergency release handle 6 feet (1.83 m) above
floor.
7. NEVER connect garage door opener to power source
until instructed to do so.
8. NEVER wear watches, rings or loose clothing while
installing or servicing opener. They could be caught in
garage door or opener mechanisms.
9. Install wall-mounted garage door control:
• within sight of the garage door.
• out of reach of children at minimum height of 5 feet
(1.5 m).
• away from all moving parts of the door.
10. Place entrapment warning label on wall next to garage
door control.
11. Place manual release/safety reverse test label in plain
view on inside of garage door.
12. Upon completion of installation, test safety reversal
system. Door MUST reverse on contact with a
1-1/2" (3.8 cm) high object (or a 2x4 laid flat) on
the floor.
7
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Unfinished
Ceiling
OPTIONAL
CEILING
MOUNT
FOR
HEADER
BRACKET
INSTALLATION STEP 1
Determine the Header Bracket
Location
2x4
Header Wall
WARNING
To prevent possible SERIOUS INJURY or DEATH:
Vertical Centerline
of Garage Door
2x4
Structural
Supports
• 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.
Level
(optional)
• 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.
Installation procedures vary according to garage door
types. Follow the instructions which apply to your
door.
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.
Header Wall
2" (5 cm)
Header Wall
Track
You can fasten the header bracket within 4 feet
(1.22 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 9) when clearance is minimal. (It may
be mounted on the wall upside down if
Track
2" (5 cm)
Highest Point
of Travel
Highest Point
of Travel
Door
Door
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 9.
One-piece door with horizontal track
Sectional door with curved track
3. Open your door to the highest point of travel as
shown. Draw an intersecting horizontal line on the
header wall above the high point:
• 2" (5 cm) above the high point for sectional door
and one-piece door with track.
Header Wall
8" (20 cm)
• 8" (20 cm) above the high point for one-piece
door without track.
Header Wall
8" (20 cm)
This height will provide travel clearance for the top
edge of the door.
Highest
Highest
Door
Point
Point
of Travel
NOTE: If the total number of inches exceeds the
height available in your garage, use the maximum
height possible, or refer to page 9 for ceiling
installation.
of Travel
Door
Jamb
Hardware
Pivot
One-piece door without track:
pivot hardware
One-piece door without track:
jamb hardware
8
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INSTALLATION STEP 2
Install the Header Bracket
Wall Mounting Holes
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).
CEILING MOUNT ONLY
The nail hole is for
positioning only.
You must use lag screws
to mount the header bracket.
UP
WALL HEADER BRACKET INSTALLATION
Optional
Wall Mounting Holes
• 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).
Vertical
Centerline of
Garage Door
Header
Wall
Y
L
N
O
T
Lag Screws
5/16"x9x1-5/8"
N
U
O
• 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.
M
G
N
I
IL
E
C
UP
2x4
Structural
Support
Header
Bracket
Door Spring
HARDWARE SHOWN ACTUAL SIZE
Horizontal
Line
Garage
Door
Highest Point of
Garage Door Travel
Vertical
Centerline of
Garage Door
Lag Screw
5/16"-9x1-5/8"
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.
– Finished Ceiling –
Vertical
Centerline
of Garage Door
Header
Bracket
• Mark the side holes. Drill 3/16" pilot holes and
fasten bracket securely to a structural support with
the hardware provided.
P
U
6" (15 cm)
Maximum
Door
Spring
Lag Screws
5/16"-9x1-5/8"
Ceiling Mounting Holes
CEILING MOUNT ONLY
UP
Header Wall
The nail hole is for
positioning only.
You must use lag screws
to mount the header bracket.
Garage Door
Vertical
Centerline
of Garage Door
9
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INSTALLATION STEP 3
Attach the T-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.
Header Wall
Header Bracket
• Position the rail bracket against the header
bracket.
• Align the bracket holes and join with a clevis pin
as shown.
Chain Pulley Bracket
• Insert a ring fastener to secure.
Ring Fastener
Header Bracket
Clevis Pin
5/16"x2-3/4"
Chain
Pulley
Bracket
Rail
Garage
Door
Temporary
Support
HARDWARE SHOWN ACTUAL SIZE
Clevis Pin
5/16"x2-3/4"
Ring Fastener
10
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INSTALLATION STEP 4
CAUTION
To prevent damage to garage door, rest garage door
opener rail on 2x4 placed on top section of door.
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.
Rail
• Remove foam packaging.
• Raise the opener onto a stepladder. You will need
help at this point if the ladder is not tall enough.
2x4 is used to determine
the correct mounting height
from ceiling.
Door
• 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.
Trolley
Release Arm
ENGAGED
RELEASED
Header
Bracket
Top of Door
ONE-PIECE DOOR WITHOUT TRACK
A 2x4 on its side is convenient for setting an ideal
door-to-rail distance.
2x4 is used to determine
the correct mounting height
from ceiling.
• Remove foam packaging.
• 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 on its
side on the top section of the door beneath the rail.
• The top of the door should be level with the top of
the motor unit. Do not position the opener more
than 4" (10 cm) above this point.
11
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INSTALLATION STEP 5
WARNING
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.
Hang the Opener
Three 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.
Figure 1
Structural
Supports
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.
Lag Screws
5/16"-18x1-7/8"
Measure
Distance
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.
Bolt 5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18
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).
Figure 2
Hidden
Support
7. Remove the 2x4. Operate the door manually. If the
door hits the rail, raise the header bracket.
Bracket
(Not Provided)
FINISHED CEILING
8. Grease the top and underside of the rail surface
where the trolley slides with rail grease.
Lag Screws
5/16"-18x1-7/8"
NOTE: DO NOT connect power to opener at this
time.
(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
HARDWARE SHOWN ACTUAL SIZE
Lag Screw 5/16"-18x1-7/8"
Figure 3
Lag Screws
5/16"-18x1-7/8"
FINISHED CEILING
Hex Bolt
5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18
(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
12
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INSTALLATION STEP 6
WARNING
Install the Door Control
To prevent possible SERIOUS INJURY or DEATH from
electrocution:
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.
• 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 (1.5m),
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.
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.
HARDWARE SHOWN ACTUAL SIZE
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.
Insulated
Staples
Screw 6ABx1-1/2"
Lighted Door Control Button
Drywall Anchors
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 16.
Opener
Terminal Screws
Bell Wire
Bell Wire
1
2
3
WHT
-2
9
9
1
1
7
3
7
3
5
5
Kg
Kg
RED
-1
Lighted Door
Control Button
Terminal Screws
Back Panel
Lighted
Door Control Button
Antenna
13
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INSTALLATION STEP 7
CAUTION
Install the Light
To prevent possible OVERHEATING of the endpanel or
light socket,
INSTALL THE LIGHT
• DO NOT use short neck or specialty light bulbs.
• Install a 75 watt maximum light bulb in the socket.
The light will turn ON and remain lit for
• DO NOT use halogen bulbs. Use ONLY incandescent.
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") the two
screws near top of opener front panel.
Panel Screw
Light
Lens
• Position lens against panel with slotted tabs
directly below screws. Slide lens up to seat tabs
behind screws.
Lens Slot
75 Watt Max.
Light Bulb
• Snap bottom tabs of lens into panel slots.
• Retighten top panel screws to secure lens.
Lens Tab
INSTALLATION STEP 8
Attach the Emergency Release
Rope and Handle
WARNING
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.
• 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.
• NEVER use handle to pull door open or closed. If
rope knot becomes untied, you could fall.
• Adjust rope length so the handle is 6 feet (1.83 m)
above the floor. Ensure that the rope and handle
clear the tops of all vehicles to avoid
entanglement. 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.
Overhand
Knot
Trolley
Trolley
Release Arm
Rope
NOTICE
Emergency
Release Handle
14
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INSTALLATION STEP 9
WARNING
Electrical Requirements
To prevent possible SERIOUS INJURY or DEATH from
electrocution or fire:
To avoid installation difficulties, do not run the
opener at this time.
• 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.
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.
PERMANENT WIRING
CONNECTION
RIGHT
WRONG
Ground Tab
If permanent wiring is required by your local
code, refer to the following procedure.
Green
Ground Screw
To make a permanent connection through the 7/8"
hole in the top of the motor unit:
Black
Wire
Ground Wire
• Remove the motor unit cover screws and set the
cover aside.
• Remove the attached 3-prong cord.
Black Wire
White Wire
• 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.
15
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INSTALLATION STEP 10
WARNING
®
Install The Protector System
• Be sure power is not connected to the garage door
opener BEFORE installing the safety reversing sensor.
The safety reversing sensor must be connected
and aligned correctly before the garage door
opener will move in the down direction.
• 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.
IMPORTANT INFORMATION ABOUT
THE SAFETY REVERSING SENSOR
– Install the safety reversing sensor so beam is NO
HIGHER than 6" (15 cm) above garage floor.
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.
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 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 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.
The mounting brackets are designed to clip onto the
track of sectional garage doors without additional
hardware.
Sensor Beam
Sensor Beam
6" (15 cm) max.
above floor
Invisible Light Beam
Protection Area
6" (15 cm) max.
above floor
Facing the door from inside the garage
16
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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.
DOOR TRACK MOUNT (RIGHT SIDE)
Figure 1
Door
Track
Lip
Garage door track installation (preferred):
Indicator
Light
• 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.
Sensor
Bracket
Lens
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.
WALL MOUNT (RIGHT SIDE)
Inside
arage
G
Figure 2
Fasten Wood Block to Wall with
Lag Screws (Not Provided)
all
W
• If additional depth is needed, an extension bracket
(See Accessories) or wood blocks can be used.
Indicator
Light
Sensor
Bracket
• 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.
Lag Screws
(Not Provided)
Lens
• 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.
WALL MOUNT (RIGHT SIDE)
Figure 3
Inside
Extension
Bracket
(See Accessories)
arage
G
all
Floor installation (Figure 4):
W
• 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.
(Provided with
Extension Bracket)
• Carefully measure and place right and left
assemblies at the same distance out from the wall.
Be sure all door hardware obstructions are
cleared.
Sensor
Bracket
(Provided with
Extension
Bracket)
• Fasten to the floor with concrete anchors as
shown.
Indicator
Light
Lens
FLOOR MOUNT (RIGHT SIDE)
Figure 4
HARDWARE SHOWN ACTUAL SIZE
Attach with
Concrete Anchors
(Not Provided)
Inside
arage
G
all
W
Lens
Carriage Bolt
1/4"-20x1/2"
Wing Nut
1/4"-20
Staples
Indicator
Light
Sensor
Bracket
17
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MOUNTING AND WIRING THE SAFETY SENSORS
Figure 5
• 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).
Wing Nut
Carriage Bolt
1/4"-20x1/2"
• Finger tighten the wing nuts.
Lens
• Run the wires from both sensors to the opener.
Use insulated staples to secure wire to wall and
ceiling.
TROUBLESHOOTING THE SAFETY SENSORS
1. If the sending eye indicator light does not glow
steadily after installation, check for:
• 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).
• Electric power to the opener.
• A short in the white or white/black wires. These
can occur at staples, or at opener connections.
ALIGNING THE SAFETY SENSORS
• Incorrect wiring between sensors and opener.
• A broken wire.
• Plug in the opener. The indicator lights in both the
sending and receiving eyes will glow steadily if
wiring connections and alignment are correct.
2. If the sending eye indicator light glows steadily but
the receiving eye indicator light doesn't:
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.
• Check alignment.
• Check for an open wire to the receiving eye.
3. If the receiving eye indicator light is dim, realign
either sensor.
• Loosen the sending eye wing nut and readjust,
aiming directly at the receiving eye. Lock in place.
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. See page 16.
• 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.
Figure 6
Connect Wire to
Opener Terminal screws
Finished Ceiling
Bell Wire
Bell Wire
Sensor
Connections
Door Control
Connections
(dotted line)
1
2
3
OPENER TERMINAL SCREWS
Sensor
Invisible Light Beam
Protection Area
Sensor
18
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INSTALLATION STEP 11
CAUTION
Fiberglass, aluminum or lightweight steel garage doors
WILL REQUIRE reinforcement BEFORE installation of
door bracket. Contact your door manufacturer for
reinforcement kit.
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.
Header
Bracket
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.
Door
Bracket
Location
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.
HORIZONTAL AND VERTICAL
REINFORCEMENT IS NEEDED
FOR LIGHTWEIGHT GARAGE
DOORS (FIBERGLASS,
ALUMINUM, STEEL, DOORS
WITH GLASS PANEL, ETC.).
(NOT PROVIDED)
Vertical
Centerline
of Garage
Door
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.
Figure 1
Vertical
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.
Reinforcement
(Not Provided)
Vertical
Centerline
of Garage Door
Vertical
Reinforcement
Vertical
Centerline
of Garage Door
Bolt
3. Mark, drill holes and install as follows, depending
on your door’s construction:
5/16"-18x2"
UP
Metal or light weight doors using a vertical angle
iron brace between the door panel support and
the door bracket:
Door
Bracket
UP
Lock Washer
5/16"
Door
Nut
• Drill 3/16" fastening holes. Secure the door bracket
using the two 1/4"-14x5/8" self-threading screws.
(Figure 2A)
Bracket
5/16"-18
Self-Threading
Screw
1/4"-14x5/8"
Figure 2B
• Alternately, use two 5/16" bolts, lock washers and
nuts (not provided). (Figure 2B)
Figure 2A
Inside Edge
of Door or
Reinforcement Board
(Not Provided)
Metal, insulated or light weight factory reinforced
doors:
Bolt
5/16"x2"
• Drill 3/16" fastening holes. Secure the door bracket
using the self-threading screws. (Figure 3)
Wood Doors:
UP
• 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)
Vertical
Centerline
of Garage Door
Vertical
Centerline
of Garage
Door
UP
NOTE: The 1/4"-14x5/8"
self-threading screws are
not intended for use on
HARDWARE
SHOWN
ACTUAL SIZE
Self-Threading
Screw
1/4"-14x5/8"
Figure 4
wood doors.
Self-Threading
Screw
Figure 3
1/4"-14x5/8"
19
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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.
HARDWARE SHOWN
ACTUAL SIZE
• 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.
Self-Threading Screw
1/4"-14x5/8"
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"
Door
Bracket
Top of Door
Header Wall
Finished Ceiling
2x4 Support
(Inside
Garage)
Top Edge
of Door
Header
Bracket
Optional
Placement
Door
Bracket
METAL DOOR
Optional
HORIZONTAL AND VERTICAL
Placement
REINFORCEMENT IS NEEDED
Nut
5/16"-18
of Door
Bracket
Lock
Washer
5/16"
FOR LIGHTWEIGHT GARAGE
DOORS (FIBERGLASS,
ALUMINUM, STEEL, DOORS
WITH GLASS PANEL, ETC.).
Top of Door
Door
Bracket
(NOT PROVIDED)
Vertical
(Inside
Centerline of
Garage Door
Garage)
Top Edge
of Door
Optional
Placement
Carriage Bolt
5/16"x2"
(Not Provided)
WOOD DOOR
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.
20
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INSTALLATION STEP 12
Connect Door Arm to Trolley
Inner Trolley
Outer Trolley
Follow instructions which apply to your door type as
illustrated below and on the following page.
Clevis Pin
5/16"x1"
SECTIONAL DOORS ONLY
Ring
• 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.
Fastener
Emergency
Release
Handle
Door
Bracket
• Figure 1:
Straight
Door Arm
– Fasten straight door arm section to outer trolley
with the 5/16"x1" clevis pin. Secure the
connection with a ring fastener.
Curved
Door Arm
Clevis Pin
5/16"x1-1/4"
– Fasten curved section to the door bracket in the
same way, using the 5/16"x1-1/4" clevis pin.
Figure 1
• 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"
(15 cm) from the solid end. Reconnect to trolley
with cut end down as shown.
Lock
Washers
5/16"
– Bring arm sections together.
Nuts
5/16"-18
– Find two pairs of holes that line up and join with
bolts, lock washers and nuts.
• Pull the emergency release handle toward the
opener at a 45° angle so that the trolley release
arm is horizontal. Proceed to Adjustment Step 1,
page 23. Trolley will re-engage automatically when
opener is operated.
Bolts
5/16"-18x7/8"
Door Bracket
Figure 2
HARDWARE SHOWN ACTUAL SIZE
Lock
Washers
5/16"
Nut 5/16"-18
Lock Washer 5/16" Ring Fastener
Nuts
5/16"-18
Clevis Pin
5/16"x1" (Trolley)
Clevis Pin
Hex Bolt
5/16"x1-1/4" (Door Bracket) 5/16"-18x7/8"
Bolts
5/16"-18x7/8"
Cut This End
Figure 3
21
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ALL ONE-PIECE DOORS
Door
Bracket
Ring
Fastener
1. Assemble the door arm, Figure 4:
Nuts
5/16"-18
• Fasten the straight and curved door arm sections
together to the longest possible length (with a 2
or 3 hole overlap).
Lock
Washers
5/16"
Clevis Pin
5/16"x1-1/4"
Straight
Arm
• With the door closed, connect the straight door
arm section to the door bracket with the
5/16"x1-1/4" clevis pin.
Bolts
5/16"-18x7/8
Curved
Door Arm
Figure 4
• Secure with a ring fastener.
- Press the Door Control push button. The trolley
will travel to the fully closed position.
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 23. Follow
adjustment procedures below.
- 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.
• Open door adjustment: decrease UP
travel limit
- Turn the UP limit adjustment screw
counter-clockwise 4 turns.
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.
- 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.
• 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.
• Closed door adjustment: decrease DOWN
travel limit
- Turn the DOWN limit adjustment screw
clockwise 4 complete turns.
Figure 5
Inner Trolley
Outer Trolley
Door Arm
Connector Hole
Door Arm
Emergency Release Handle
Closed
Door
Inner Trolley
Outer Trolley
Door Arm
Correct Angle
Door with
Backward Slant (Incorrect)
Open Door
22
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ADJUSTMENT STEP 1
WARNING
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.
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?
• 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" high (3.8 cm) object (or 2x4 laid
flat) on floor.
• 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 25).
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.
CAUTION
To prevent damage to vehicles, be sure fully open door
provides adequate clearance.
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.
Cover
Protection
Bolt
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.
2-4"
(5-10 cm)
HOW AND WHEN TO ADJUST THE LIMITS
• If the door does not open completely but opens
at least five feet (1.5 m):
Increase up travel. Turn the UP limit adjustment
screw clockwise. One turn equals 2" (5 cm) of
travel.
Travel Limit Adjustment Screws
NOTE: To prevent the trolley from hitting the cover
protection bolt, keep a minimum distance of 2-4"
(5 cm - 10 cm) between the trolley and the bolt.
Adjustment Label
• 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:
• If the door reverses when closing and there is
no visible interference to travel cycle:
Increase down travel. Turn the down limit
adjustment screw counterclockwise. One turn
equals 2" (5 cm) of travel.
If the opener lights are flashing, the Safety
Reversing Sensors are either not installed,
misaligned, or obstructed. See Troubleshooting,
page 18.
If door still won't close completely and the trolley
bumps into the pulley bracket (page 4), try
lengthening the door arm (page 21) and
decreasing the down limit.
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.
• 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.
23
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ADJUSTMENT STEP 2
WARNING
Adjust the Force
Without a properly installed safety reversal system,
persons (particularly small children) could be
SERIOUSLY INJURED or KILLED by a closing garage
door.
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.
• 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" high (3.8 cm) object (or 2x4 laid
flat) on floor.
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
Force Adjustment
Controls
• 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 25. 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.
1
2
3
9
9
1
1
7
3
7
3
5
5
KG
KG
• 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
BACK PANEL
adjustment, run the opener through a complete
travel cycle. Do not increase the force beyond the
minimum amount required to close the door.
FORCE ADJUSTMENT LABEL
9
9
1
1
2. Test the UP (open) force
7
7
3
3
• 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.
5
5
Kg
Kg
Close Force
Open Force
• 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.
24
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ADJUSTMENT STEP 3
WARNING
Test the Safety Reversal System
Without a properly installed safety reversal system,
persons (particularly small children) could be
SERIOUSLY INJURED or KILLED by a closing garage
door.
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.
• 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" high (3.8 cm) object (or 2x4 laid
flat) on the floor.
• 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 21.
• 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.
• If the unit continues to fail the Safety Reverse Test,
call for a trained door systems technician.
IMPORTANT SAFETY CHECK:
Test the Safety Reverse System after:
• Each adjustment of door arm length, limits, or
force controls.
1-1/2" (3.8 cm) board
(or a 2x4 laid flat)
• 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.
WARNING
Without a properly installed safety reversing sensor,
persons (particularly small children) could be
SERIOUSLY INJURED or KILLED by a closing garage
door.
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
(2.5 cm), 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
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OPERATION
IMPORTANT SAFETY INSTRUCTIONS
WARNING
To reduce the risk of SEVERE INJURY or DEATH:
1. READ AND FOLLOW ALL WARNINGS AND
INSTRUCTIONS.
8. NEVER use handle to pull garage door open or closed.
If rope knot becomes untied, you could fall.
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.
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" high
(3.8 cm) high object (or a 2x4 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.
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.
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.
4. If the door has been stopped in a partially open
position, it will close.
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.
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.
Activate your opener with any of the following:
• The hand-held Remote Control: Hold the large
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 provided
with your garage door opener, it must be
The opener lights 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.
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.
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 75 watts maximum.
3. If opening, the door will stop.
26
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Using the Wall-Mounted
Door Control
To Open the Door Manually
WARNING
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.
The door should be fully
closed if possible. Pull down
on the emergency release
Trolley
handle and lift the door
Release
Emergency
Release
Arm
manually. To reconnect the
door to the opener, press the
door control push bar.
Handle
N
O
T
IC
E
(Pull Down)
MANUAL DISCONNECT
POSITION
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
Trolley
Release
Arm
Emergency
Release Handle
(Down and Back)
manually as often as
E
IC
T
O
N
necessary. To disengage the
lockout feature, pull the
LOCKOUT POSITION
handle straight down. The
trolley will reconnect on the
next UP or DOWN operation,
either manually or by using
the door control or remote.
27
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THE REMOTE CONTROL BATTERY
CARE OF YOUR OPENER
LIMIT AND FORCE ADJUSTMENTS:
WARNING
Weather conditions may
cause some minor changes
FORCE CONTROLS
To prevent possible SERIOUS INJURY or DEATH:
• NEVER allow small children near batteries.
• If battery is swallowed, immediately notify doctor.
9
9
1
1
in door operation requiring
some re-adjustments,
particularly during the first
year of operation.
7
7
3
3
5
5
KG
KG
The lithium battery should
produce power for up to
Pages 23 and 24 refer to the
limit and force adjustments.
Only a screwdriver is
LIMIT CONTROLS
Battery
positive
5 years. To replace battery,
use the visor clip or
screwdriver blade to pry
open the case as shown.
Insert battery positive side
up (+).
side up (+)
required. Follow the
instructions carefully.
Repeat the safety reverse test (Adjustment
Step 3, page 25) after any adjustment of limits or
force.
Dispose of old battery properly.
MAINTENANCE SCHEDULE
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.
Once a Month
• Manually operate door. If it is unbalanced or
binding, call a trained door systems technician.
• Check to be sure door opens and closes fully.
Adjust limits and/or force if necessary. (See pages
23 and 24.)
• Repeat the safety reverse test. Make any
necessary adjustments. (See Adjustment Step 3.)
Twice a Year
• Check chain tension. Disconnect trolley first. Adjust
if necessary (See page 7).
Once a Year
• Oil door rollers, bearings and hinges. The opener
does not require additional lubrication. Do not
grease the door tracks.
28
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HAVING A PROBLEM?
Bell Wire
1. My door will not close and the light bulbs blink
on my motor unit: The safety reversing sensor
must be connected and aligned correctly before
the garage door opener will move in the down
direction.
1
2
3
9
1
9
1
7
3
7
3
5
5
KG
KG
• Verify the safety sensors are properly installed,
aligned and free of any obstructions. Refer to
Installation Step 10: Install The Protector
System®.
1
"Learn"
Button
LED or
Diagnostic
LED
• Check diagnostic LED for flashes on the motor
unit then refer to the Diagnostic Chart on the
following page.
Safety Sensor
2. My remotes will not activate the door:
• Verify your Multi-Function Door Control is not
blinking. If it is blinking, deactivate the Lock
Mode following the instructions for Using the
Multi-Function Door Control.
Sending Eye Safety Sensor
(Amber Indicator Light)
Receiving Eye Safety Sensor
(Green Indicator Light)
• Reprogram remotes following the programming
instructions. Refer to Programming.
• If remote will still not activate your door, check
diagnostic LED for flashes on motor unit then
refer to Diagnostic Chart on the following page.
6. My motor unit hums briefly:
• First verify that the trolley is against the stop bolt.
3. My door reverses for no apparent reason:
Repeat safety reverse test after adjustments to
force or travel limits. The need for occasional
adjustment for the force and limit settings is
normal. Weather conditions in particular can affect
door travel.
• Release the door from the opener by pulling the
Emergency Release Rope.
• Manually bring the door to a closed position.
• Loosen the chain by adjusting the outer nut 4 to
5 turns. This relieves the tension.
• Manually check door for balance or any binding
problems.
• Run the motor unit from the remote control or
door control. The trolley should travel towards
the door and stop. If the trolley re-engages with
the door, pull the Emergency Release Rope to
disengage.
• Refer to Adjustment Step 2, Adjust the Force.
4. My door reverses for no apparent reason after
fully closing and touching the floor: Repeat
safety reverse test after adjustments to force or
travel limits. The need for occasional adjustment
for the force and limit settings is normal. Weather
conditions in particular can affect door travel.
• Decrease the UP travel by turning the UP Travel
adjustment screw 2 full turns away from
the arrow.
• Re-tighten the outer nut so the chain is a
1/2" (13 mm) above the base of the rail. (When
the door is reconnected and closed, the chain
will sag. This is normal.)
• Refer to Adjustment Step 1, Adjust the UP and
DOWN Travel Limits. Decrease down travel by
turning down limit adjustment screw clockwise.
• If the trolley does not move away from the bolt,
repeat the steps above.
5. My lights will not turn off when door is open:
• The garage door opener is equipped with a
security light feature. This feature activates the
light on when the safety sensor beam has been
obstructed. Refer to Operation section; Using the
Wall Mounted Door Control, Light Feature.
29
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Bell Wire
1
2
3
Diagnostics
Located On
Motor Unit
9
1
9
1
7
3
7
3
5
5
KG
KG
Installed
Safety Sensor
1
"Learn"
Button
Your garage door opener is programmed with
LED or
Diagnostic
LED
Safety Sensor
self-diagnostic capabilities. The “Learn” button/diagnostic
LED will flash a number of times then pause signifying it
has found a potential issue. Consult Diagnostic Chart below.
Diagnostic Chart
Symptom: One or both of the Indicator lights on the safety sensors do
not glow steady.
• Inspect sensor wires for a short (staple in wire), correct wiring polarity
(black/white wires reversed), broken or disconnected wires, replace/attach
as needed.
1 FLASH
Safety sensors wire open
(broken or disconnected).
OR
• Disconnect all wires from back of motor unit.
• Remove sensors from brackets and shorten sensor wires to 1-2 ft. (30-60 cm)
from back each of sensor.
2 FLASHES
• Reattach sending eye to motor unit using shortened wires. If sending eye
indicator light glows steadily, attach the receiving eye.
• Align sensors, if the indicator lights glow replace the wires for the sensors. If
the sensor indicator lights do not light, replace the safety sensors.
Safety sensors wire
shorted or black/white
wire reversed.
Symptom: LED is not lit on door control.
• Inspect door control/wires for a short (staple in wire), replace as needed.
• Disconnect wires at door control, touch wires together. If motor unit activates,
replace door control.
3 FLASHES
Door control or
wire shorted.
• If motor unit does not activate, disconnect door control wires from motor unit.
Momentarily short across red and white terminals with jumper wire. If motor
unit activates, replace door control wires.
4 FLASHES
Symptom: Sending indicator light glows steadily, receiving indicator light
is dim or flashing.
• Realign receiving eye sensor, clean lens and secure brackets.
• Verify door track is firmly secured to wall and does not move.
Safety Sensors
slightly misaligned
(dim or flashing LED).
Symptom: Motor has over heated; the motor unit does not operate or
trolley is stuck on stop bolt = Motor unit hums briefly; RPM Sensor =
Short travel 6-8" (15-20 cm).
• Unplug unit to reset. Try to operate motor unit, check diagnostic code.
• If it is still flashing 5 times and motor unit moves 6-8" (15-20 cm), replace RPM
sensor.
5 FLASHES
Motor overheated or
possible RPM sensor
failure. Unplug to reset.
• If motor unit doesn’t operate, motor unit is overheated. Wait 30 minutes and
retry. If motor unit still will not operate replace logic board.
6 FLASHES
Symptom: Motor unit doesn’t operate.
• Replace logic board because motor rarely fails.
Motor Circuit Failure.
Replace Receiver
Logic Board.
30
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PROGRAMMING
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.
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.
To Add or Reprogram a Hand-held Remote Control
USING THE “LEARN” BUTTON
1
2
3
To Erase All Codes From Motor
Unit Memory
To deactivate any unwanted remote,
first erase all codes:
1
2
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.
*3-Button Remotes
1. Press and release the “learn”
button on the motor unit. The
learn indicator light will glow
steadily for 30 seconds.
If provided with your garage door opener, the large
button is factory programmed to operate it. Additional
buttons on any
Security✚® 3-Button
remote or compact
remote can be
programmed to operate
2. Within 30 seconds, press and
hold the button on the hand-held
remote* that you wish to operate
your garage door.
other Security✚®
garage door openers.
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.
31
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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
To change an existing, known PIN
If the existing PIN is known, it may be changed by one
person without using a ladder.
1
2
3
9
1
9
1
7
3
7
3
5
5
K
G
K
G
1. Press the four buttons for the present PIN, then
press and hold the # button.
1
2
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.
1. Press and release the “learn”
button on motor unit. The learn
indicator light will glow steadily for
30 seconds.
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:
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.
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.
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.
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.
32
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REPAIR PARTS
Rail Assembly Parts
5
1
3
4
2
KEY
NO.
PART
NO.
DESCRIPTION
1
2
3
4
5
6
4A1008
Master link kit
41A4813
41A3489
1707LM
41D3484
83A11-2
Chain pulley bracket
Complete trolley assembly
One-piece rail
6
Full chain assembly
Rail grease
Installation Parts
1
2
4
3
KEY PART
NO. NO.
Y
L
N
O
T
N
U
O
M
DESCRIPTION
G
N
I
L
I
E
C
P
U
7
1
2
3
4
5
41A4166
971LM
10A20
29B137
41A2828
Door control button
Single-button remote control
3V2032 Lithium battery
Transmitter visor clip
Emergency release rope & handle
assembly
5
6
NOTICE
6
7
8
9
41B4494-1
41A4353
41A5047
41A5034
2-conductor bell wire – white & white/red
Header bracket w/clevis pin & fastener
Door bracket w/clevis pin & fastener
Safety sensor kit (receiving and sending
eyes) with 3' 2-conductor bell
wire attached
8
10
10
11
12
178B34
178B35
41A5266-1
Straight door arm section
Curved door arm section
Safety sensor brackets (2)
NOT SHOWN
9
11
41A2770-6
114A2648
Installation hardware bag (see page 5).
Owner's manual
12
114A2648SP Owner’s manual - Spanish
33
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Motor Unit Assembly Parts
1
2
4
20
3
8
7
16
19
9
6
10
5
17
18
3
11
13
15
16
LIMIT SWITCH ASSY.
(Down)
Contact
14
Brown
Wire
D N
Grey
Wire
U P
Drive
Gear
Center Limit
Contact
(Up)
Contact
Yellow
Wire
12
KEY PART
KEY PART
NO.
NO.
DESCRIPTION
NO.
NO.
DESCRIPTION
1
2
31D380 Sprocket cover
41C4220A Gear and sprocket assy. Complete
11
41D3058
Universal replacement motor &
bracket assy. Complete with:
Motor, worm, bracket, bearing
assembly, RPM sensor.
with: Spring washer, thrust washer,
retaining ring, bearing plate, roll
pins (2), drive gear and worm gear,
helical gear w/retainer and grease
12
13
14
15
16
17
18
19
41A3583-11 Cover
41A2818
41D3452
41C4398A RPM sensor assembly
41C4246
41A2826
Helical gear & retainer w/grease
Limit switch assembly
3
41A2817 Drive/worm gear kit w/grease,
Roll pins (2)
41B4245 Line cord
143D100 End panel w/all labels
175B88 Light socket
108D36 Lens
30B532 Capacitor - 1/2HP
12A373 Capacitor bracket
41A3150 Terminal block w/screws
4
5
6
7
8
Wire harness assy. w/plug
Shaft bearing kit
41A2822A Interrupter cup assy.
41A5021-1F Receiver logic board assy.
Complete with: Logic board,
End panel w/all labels
9
10
20
41A5014-3 End panel w/all labels
NOT SHOWN
41A2825
Opener assy. hardware kit (includes
screws not designated by a number
in illustration).
34
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ACCESSORIES
1702LM
995LM
Remote Light Control:
Outside Quick Release:
Enables homeowner to turn on a lamp,
television or other appliance from their car
with their garage door opener remote or
from anywhere in their home with an
additional LiftMaster Security✚® remote.
Required for a garage with NO
access door. Enables homeowner to
open garage door manually from
outside by disengaging trolley.
1708LM
8 Foot Complete Rail:
Designer Burled Walnut 3-Button Remote
973W
Control with Security✚®:
To allow an 8 foot door to open fully.
Includes visor clip.
3-Button Security✚® Remote Control:
973LM
1710LM
10 Foot Complete Rail:
Includes visor clip.
To allow a 10 foot door to open fully.
4-Button Security✚® Remote Control:
974LM
970LM
41A5281
Extension Brackets:
Includes visor clip.
(Optional) For safety sensor
installation onto the wall or floor.
3-Button Mini-Remote Control with
Multi-Function Door
Control Panel:
78LM
Security✚®:
With key ring and fastening strip.
Provides a Lock Feature which prevents
operation of garage door opener from
portable remotes and a Light Feature for
constant light.
LOCK
LIGHT
Garage Door Monitor:
915LM
916LM
Security for the largest door of your home!
2 & 3 Door Multi-Function Wall
Control:
902LM/903LM
Tells you if your garage door is open or
closed. Monitors up to 4 garage doors by
adding additional sensor modules.
Ideal for homes with up to three garage
doors. Combine up to three controls
into one wall control panel for a neat
compact appearance. Enhanced
CLOSED
OPEN
functions include Lock Feature to lock
out outside radio signals while you are
away from home and turn opener lights
on or off from the control panel.
Garage Door Monitor Sensor:
Additional accessory sensor for homes with
multiple garage doors.
Wireless Keyless Entry with
976LM
Security✚®:
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.
35
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LIFTMASTER SERVICE IS
ON CALL
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.
OUR LARGE SERVICE ORGANIZATION
SPANS AMERICA
WHEN ORDERING REPAIR PARTS, ALWAYS GIVE
THE FOLLOWING INFORMATION:
INSTALLATION AND SERVICE INFORMATION IS AS
NEAR AS YOUR TELEPHONE SEVEN DAYS A WEEK.
SIMPLY DIAL OUR TOLL FREE NUMBER:
• PART NUMBER
• PART NAME
1-800-528-2817
• MODEL NUMBER
HOURS: (Central Standard Time)
6:00 A.M. TO 7:00 P.M. - Monday through Friday
8:00 A.M. TO 6:00 P.M. - Saturday
ADDRESS ORDERS TO:
THE CHAMBERLAIN GROUP, INC.
Technical Support Group
8:00 A.M. To 4:30 P.M. - Sunday
6020 S. Country Club Road
Tucson, Arizona 85706
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.
SERVICE INFORMATION
TOLL FREE NUMBER:
1-800-528-2817
LIFTMASTER ONE-YEAR LIMITED WARRANTY
FOUR YEAR 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 four years 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 warranty in its entirety.
If, during the limited warranty period, this product appears to contain a defect covered by this limited warranty, call
1-800-528-2817, 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.
THIS LIMITED WARRANTY IS IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING ANY
IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR OTHERWISE, AND OF
ANY OTHER OBLIGATIONS OR LIABILITY ON SELLER’S PART. 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. 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.
© 2004, The Chamberlain Group, Inc.
114A2648D
All Rights Reserved
Printed in Mexico
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