Chamberlain Garage Door Opener 1255 2R User Manual

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  
25  
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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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