Chamberlain Liftmaster ATS 211X User manual

The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
www.liftmaster.com
COMMERCIAL DOOR OPENER
Model ATS 211X 1/2 HP
For Residential And Light Duty Commercial Use
Install on Sectional Doors 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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UP
FORCE DOWN
FORCE

2
Introduction 2-5
Safety symbol and signal word review........................2
Preparing your garage door ........................................3
Tools needed...............................................................3
Planning .....................................................................4
Carton inventory..........................................................5
Hardware inventory .....................................................5
Assembly 6-7
Attach the rail to the motor unit...................................6
Attach the chain to the sprocket and install
the rail support bracket .............................................6
Tighten the chain.........................................................7
Installation 7-19
Installation safety instructions .....................................7
Determine the header bracket location .......................8
Install the header bracket............................................9
Attach the rail to the header bracket.........................10
Position the opener ...................................................11
Hang the opener........................................................11
Install the door control...............................................12
Install the light ...........................................................13
Attach the emergency release rope and handle .......13
Electrical requirements..............................................14
Install the Protector System®................................15-17
Fasten the door bracket ............................................18
Connect the door arm to the trolley ..........................19
Adjustment 20-22
Adjust the travel limits ...............................................20
Adjust the force .........................................................21
Test the safety reversal system.................................22
Test the Protector System®........................................22
Operation 23-25
Operation safety instructions.....................................23
Using your garage door opener ................................23
Using the wall-mounted door control ........................24
To open the door manually........................................24
Care of your garage door opener..............................24
Having a problem? ....................................................25
Programming 26-28
3-Channel remote controls (Optional) .......................26
Multi-Function door control (Optional).......................27
To add or change a Keyless Entry PIN (Optional) ....28
Repair Parts 29-30
Rail assembly parts...................................................29
Installation parts ........................................................29
Motor unit assembly parts .........................................30
Accessories 31
Repair Parts and Service 32
Warranty 32
TABLE OF CONTENTS
When you see these Safety Symbols and Signal
Words on the following pages, they will alert you to
the possibility of serious injury or death if you do
not comply with the warnings that accompany them.
The hazard may come from something mechanical
or from electric shock. Read the warnings carefully.
When you see this Signal Word on the following
pages, it will alert you to the possibility of damage to
your garage door and/or the garage door opener if
you do not comply with the cautionary statements
that accompany it. Read them carefully.
INTRODUCTION
Safety Symbol
and Signal Word Review
This garage door opener has been designed and tested to offer safe service provided it is installed, operated,
maintained and tested in strict accordance with the instructions and warnings contained in this manual.
Mechanical
Electrical
WARNING
CAUTION WARNING
WARNING
WARNING
CAUTION WARNING
WARNING
WARNING
CAUTION
WARNING
WARNING

3
To prevent damage to garage door and opener:
• ALWAYS disable locks BEFORE installing and operating
the opener.
• ONLY operate garage door opener at 120V, 60 Hz to
avoid malfunction and damage.
To prevent possible SERIOUS INJURY OR DEATH:
• ALWAYS call a trained door systems technician if
garage door binds, sticks, or is out of balance. An
unbalanced garage door may not reverse when
required.
• NEVER try to loosen, move or adjust garage door, door
springs, cables, pulleys, brackets or their hardware, all
of which are under EXTREME tension.
• Disable ALL locks and remove ALL ropes connected to
garage door BEFORE installing and operating garage
door opener to avoid entanglement.
• This product is for use on sectional garage doors only.
SERIOUS INJURY could result from the use of this
product on one piece garage doors.
Preparing your garage door
Before you begin:
• Disable locks.
• Remove any ropes connected to garage door.
• Complete the following test to make sure your
garage door is balanced and is not sticking or
binding:
1. Lift the door about halfway as shown. Release
the door. If balanced, it should stay in place,
supported entirely by its springs.
2. Raise and lower the door to see if there is any
binding or sticking.
If your door binds, sticks, or is out of balance, call a
trained door systems technician.
Tools needed
During assembly, installation and adjustment of the
opener, instructions will call for hand tools as
illustrated below.
WARNING
CAUTION WARNING
WARNING
WARNING
CAUTION
WARNING
WARNING
Pliers
Wire Cutters
Claw Hammer
Hack Saw
Screwdriver Adjustable End Wrench
1/2" and 7/16" Sockets
and Wrench
Drill
Tape Measure
2
1
Stepladder
Pencil
3/16", 5/16" and
5/32" Drill Bits
Carpenter’s
Level (Optional)
Sectional Door

Safety Reversing Sensor
Horizontal and vertical reinforcement
is needed for lightweight garage doors
(fiberglass, steel, aluminum, door with glass panels, etc.).
See page 18 for details.
Support bracket &
fastening hardware
is required.
See page 11.
— — — — — — — —
Header Wall
Safety
Reversing
Sensor
Gap between floor and bottom
of door must not exceed 1/4"
FINISHED CEILING
Extension Spring
Torsion Spring
Access Door
OR
Slack in chain tension
is normal when
garage door is closed.
Door Center
Wall-
mounted
Door
Control
4
SECTIONAL DOOR INSTALLATION
Planning
Identify the type and height of your garage door.
Survey your garage area to see if any of the
conditions below apply to your installation. Additional
materials may be required. You may find it helpful to
refer back to this page and the accompanying
illustrations as you proceed with the installation of
your opener.
Chain Pulley
Bracket
Header
Bracket
Trolley
Straight
Door
Arm
Emergency
Release
Rope & Handle
Door Bracket
Garage
Door
Curved
Door
Arm
Garage
Door
Spring
Header
Wall
Chain
CLOSED POSITION
Rail
Without a properly working safety reversal system,
persons (particularly small children) could be
SERIOUSLY INJURED or KILLED by a closing garage
door.
• The gap between the bottom of the garage door and
the floor MUST NOT exceed 1/4". Otherwise, the safety
reversal system may not work properly.
• The floor or the garage door MUST be repaired to
eliminate the gap.
WARNING
CAUTION WARNING
WARNING

5
Straight
Door Arm
Door Bracket Plate
Door Bracket
Safety Labels
and Literature
"C" Wrap (2)
2 -Conductor Bell Wire
White & White/Red
Curved Door Arm
Rail
Styrofoam
Chain
Pulley Bracket
Trolley
Chain
Safety Reversing Sensor
Mounting Bracket
With Slot (2)
Safety Reversing Sensor
Mounting Bracket
With Square Holes (2)
Mounting Hardware
(Rail Support Bracket)
Header Bracket with
Clevis Pin and Fastener
UP
CEILINGMOUNTONLY
Lighted Door
Control Button
(2) Safety Reversing Sensors
(1 Sending Eye and 1 Receiving Eye)
with 2-Conductor White & White/Black
Bell Wire attached
Rail Support
Bracket
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UP
FORCE
DOWN
FORCE
Motor Unit
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.
Carton Inventory
Assembly Hardware
Washered Screw, 5/16"-18x1/2"
(2) (Mounted in Opener)
Hex Screw 1/4"-20x5/8" (2)
Lock Washer 1/4"-20x5/8" (2)
Screw #8-32x3/8" (1)
Washered Screw
5/16"-18x1/2" (2)
Installation Hardware
Hex Screw 5/16"-18x7/8" (4)
Nut 5/16"-18 (4)
Lock Washer 5/16" (4)
Rail Grease
Lag Screw 5/16"-9x1-5/8" (4)
Screw 6ABx1-1/2" (2)
Handle
Ring Fastener (3)
Self-Threading Screw
1/4"-14x5/8" (2)
Insulated Staples (10)
Drywall Anchors (2)
Clevis Pin 5/16"x2-3/4" (1)
Clevis Pin 5/16"x1" (2)
Rope
Hardware for Safety
Reversing Sensor
Lag Screw 1/4x1-1/2" (4)
Carriage Bolt 1/4"-20x1/2" (4)
Lock Nut 1/4"-20 (4)
Wing Nut (2)
Hex Screw 1/4-20x1-1/2" (2)
Screw #10-32x3/8" (4)
Lock Nut #10x32 (4)
Insulated Staples (20)
HARDWARE INVENTORY

6
ASSEMBLY STEP 1
Attach the Rail to the Motor Unit
To avoid installation difficulties, do not run the
garage door opener until instructed to do so.
• Place the opener on packing material to protect
the cover.
• Remove the (2) 5/16"-18x1/2" washered bolts
mounted in the top of the motor unit.
• Position rail at a 45˚ angle to opener so one hole in
rail and motor unit line up.
• Thread one of the washered bolts part way in.
Use only these bolts! Use of any other bolts will
cause serious damage to door opener.
• Align rail over sprocket. Cut tape from rail.
Chain
Spreader
Sprocket
Chain
USE ONLY THIS
TYPE AND SIZE
BOLT
Opener
Washered Bolt
5/16"-18x1/2"
Rail
To avoid SERIOUS damage to opener, ONLY use
bolts/fasteners mounted in top of motor unit.
WARNING
CAUTION
WARNING
WARNING
ASSEMBLY STEP 2
Attach the Chain to the Sprocket
and Install the Rail Support Bracket
• Guide the chain over chain spreader and opener
sprocket. If necessary, loosen the outer nut on the
trolley to obtain more chain slack. Insert the second
washered bolt. Use only the bolts previously
removed from opener.
• Tighten both bolts securely through the rail into the
opener as shown.
• Position the rail support bracket on the opener.
• Attach the bracket to the rail with 1/4"-20x5/8"
hex screws and lock washers. Do not overtighten.
• Attach the bracket to the opener by inserting a
5/16"-18x1/2" washered bolt through a hole in each
side flange and a matching hole in the bracket.
Complete the connection by inserting the
#8-32x3/8" screw through the back flange and the
hole in rail support.
Proceed to Assembly Step 3.
To avoid possible SERIOUS INJURY to fingers from
moving garage door opener:
• ALWAYS keep hand clear of sprocket while operating
opener.
• Securely attach rail support bracket BEFORE operating.
WARNING
CAUTION WARNING
WARNING
Hex bolts
with Lock Washers
1/4"-20x5/8"
Rail Support
Bracket
Washered Bol
t
5/16"-18x1/2"
Washered Bolt
5/16"-18x1/2"
Screw
#8-32x3/8"
Opener
Side Flange
Opener
Back Flange
Washered Bolt
5/16"-18x1/2"
Hex Bolt
1/4"-20x5/8"
Screw
#8-32x3/8"
Lock Washer
HARDWARE SHOWN ACTUAL SIZE

7
ASSEMBLY STEP 3
Tighten the Chain
• Spin the inner nut and lock washer down the
threaded shaft, away from the trolley.
• To tighten the chain, turn outer nut in the direction
shown. As you turn the nut, keep the chain
from twisting.
• When the chain is approximately 1/2" above the
base of the rail at its midpoint, re-tighten the inner
nut to secure the adjustment.
Sprocket noise can result if chain is either too
loose or too tight.
When installation is complete, you may notice some
chain droop with the door closed. This is normal. If
the chain returns to the position shown when the
door is open, do not re-adjust the chain.
NOTE: During future maintenance, ALWAYS pull the
emergency release handle to disconnect trolley
before adjusting chain.
You have now finished assembling your garage
door opener. Please read the following warnings
before proceeding to the installation section.
Lock
Washer
To Tighten Outer Nut
Inner Nut
Trolley
Chain
Base of rail
1/2 Inch
To Tighten
Inner Nut
Outer Nut
INSTALLATION
IMPORTANT INSTALLATION INSTRUCTIONS
1. READ AND FOLLOW ALL INSTALLATION WARNINGS
AND INSTRUCTIONS.
2. Install garage door opener only on properly balanced
and lubricated garage door. An improperly balanced
door may not reverse when required and could result in
SEVERE INJURY or DEATH.
3. All repairs to cables, spring assemblies and other
hardware MUST be made by a trained door systems
technician BEFORE installing opener.
4. Disable all locks and remove all ropes connected to
garage door BEFORE installing opener to avoid
entanglement.
5. Install garage door opener 7 feet or more above floor.
6. Mount emergency release handle 6 feet 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
• 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"
high object (or a 2x4 laid flat) on the floor.
To reduce the risk of severe injury or death:
WARNING
WARNING
WARNING

8
INSTALLATION STEP 1
Determine the Header Bracket
Location
1. Close the door and mark the inside vertical
centerline of the garage door.
2. Extend the line onto the header wall above the
door.
You can fasten the header bracket within 4 feet
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 necessary,
to gain approximately 1/2".)
If you need to install the header bracket on a 2x4
(on wall or ceiling), use lag screws (not provided)
to securely fasten the 2x4 to structural supports as
shown here and on page 9.
3. Open your door to the highest point of travel as
shown. Draw an intersecting horizontal line on the
header wall 2" above the high point. This height
will provide travel clearance for the top edge of the
door.
Proceed to Step 2, page 9.
To prevent possible SERIOUS INJURY or DEATH:
• Header bracket MUST be RIGIDLY fastened to
structural support on header wall or ceiling, otherwise
garage door might not reverse when required. DO NOT
install header bracket over drywall.
• Concrete anchors MUST be used if mounting header
bracket or 2x4 into masonry.
• NEVER try to loosen, move or adjust garage door,
springs, cables, pulleys, brackets, or their hardware, all
of which are under EXTREME tension.
• ALWAYS call a trained door systems technician if
garage door binds, sticks, or is out of balance. An
unbalanced garage door might not reverse when
required.
Header Wall
Ceiling
Track
Highest Point
of Travel
Door
2"
Sectional door
with curved
track
Finished
Ceiling
Header
Wall 2x4 Structural
Supports
Vertical
Centerline
of Garage Door
WARNING
CAUTION WARNING
WARNING

9
INSTALLATION STEP 2
Install the Header Bracket
You can attach the header bracket either to the wall
above the garage door, or to the ceiling. Follow the
instructions which will work best for your particular
requirements. Do not install the header bracket
over drywall. If installing into masonry, use
concrete anchors (not provided).
WALL HEADER BRACKET INSTALLATION
• Center the bracket on the vertical centerline with
the bottom edge of the bracket on the horizontal
line as shown (with the arrow pointing toward the
ceiling).
• Mark the vertical set of bracket holes (do not use
the holes designated for ceiling mount). Drill 3/16"
pilot holes and fasten the bracket securely to a
structural support with the hardware provided.
Lag Screw
5/16"-9x1-5/8"
HARDWARE SHOWN ACTUAL SIZE
Lag Screws
5/16"-9x1-5/8"
Highest Point of
Garage Door Travel
Header
Wall
Garage
Door
UP
CEILING MOUNT ONLY
Wall Mounting Holes
Optional
Wall Mounting Holes
The nail hole is for
positioning only.
You must use lag screws
to mount the header bracket.
UP
CEILINGMOUNTONLY
Door Spring
Header
Bracket
2x4
Structural
Support
Horizontal
Line
Vertical
Centerline
of Garage Door
Vertical
Centerline
of Garage Door
UP
CEILING MOUNT ONLY
Ceiling Mounting Holes
The nail hole is for
positioning only.
You must use lag screws
to mount the header bracket.
UP
Lag Screws
5/16"-9x1-5/8"
Garage Door
Header Wall
— Finished Ceiling —
Header
Bracket
6" Maximum
Door
Spring
Vertical
Centerline
of Garage Door
Vertical
Centerline
of Garage Door
CEILING HEADER BRACKET INSTALLATION
• Extend the vertical centerline onto the ceiling as
shown.
• Center the bracket on the vertical mark, no more
than 6" from the wall. Make sure the arrow is
pointing toward the wall. The bracket can be
mounted flush against the ceiling when clearance
is minimal.
• Mark the side holes. Drill 3/16" pilot holes and
fasten bracket securely to a structural support with
the hardware provided.

10
Clevis Pin
5/16"x2-3/4" Ring Fastener
Header
Bracket
Chain
Pulley
Bracket
Temporary
Support
Header Wall
Garage
Door
Rail
Clevis Pin
5/16"x2-3/4"
Ring Fastener
Header Bracket
Chain
Pulley
Bracket
Rail
HARDWARE SHOWN ACTUAL SIZE
INSTALLATION STEP 3
Attach the Rail to the Header
Bracket
• Position the opener on the garage floor below the
header bracket. Use packing material as a
protective base. NOTE: If the door spring is in the
way you’ll need help. Have someone hold the
opener securely on a temporary support to allow
the rail to clear the spring.
• Position the chain pulley bracket against the
header bracket.
• Align the bracket holes and join with a clevis pin
as shown.
• Insert a ring fastener to secure.

11
INSTALLATION STEP 4
Position the Opener
SECTIONAL DOOR ONLY
A 2x4 laid flat is convenient for setting an ideal
door-to-rail distance.
• 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 laid flat
on the top section beneath the rail.
Trolley
Release Arm
ENGAGED RELEASED
To prevent damage to garage door, rest garage door
opener rail on 2x4 placed on top section of door.
WARNING
CAUTION
WARNING
WARNING
• If the top section or panel hits the trolley when you
raise the door, pull down on the trolley release arm
to disconnect inner and outer sections. Slide the
outer trolley toward the motor unit. The trolley can
remain disconnected until Installation Step 12
is completed.
Rail 2 x 4
Door
INSTALLATION STEP 5
Hang the Opener
Two representative installations are shown. Yours
may be different. Hanging brackets should be angled
(Figure 1) to provide rigid support. On finished
ceilings (Figure 2), attach a sturdy metal bracket to
structural supports before installing the opener. This
bracket and fastening hardware are not provided.
1. Measure the distance from each side of the motor
unit to the structural support.
2. Cut both pieces of the hanging bracket to required
lengths.
3. Drill 3/16" pilot holes in the structural supports.
4. Attach one end of each bracket to a support with
5/16"-18x1-7/8" lag screws.
5. Fasten the opener to the hanging brackets with
5/16"-18x7/8" hex bolts, lock washers and nuts.
6. Check to make sure the rail is centered over the
door (or in line with the header bracket if the
bracket is not centered above the door).
7. Remove the 2x4. Operate the door manually. If the
door hits the rail, raise the header bracket.
8. Grease the top and underside of the rail surface
where the trolley slides with rail grease.
To avoid possible SERIOUS INJURY from a falling garage
door opener, fasten it SECURELY to structural supports of
the garage. Concrete anchors MUST be used if installing
any brackets into masonry.
Hex Bolt
5/16"-18x7/8" Nut 5/16"-18 Lock Washer 5/16"
Lag Screw 5/16"-9x1-5/8"
HARDWARE SHOWN ACTUAL SIZE
Bolt 5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18
Measure
Distance
Lag Screws
5/16"-9x1-5/8"
Structural
Supports
Lag Screws
5/16"-9x1-5/8"
Bracket
(Not Provided)
FINISHED CEILING
(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
Hidden Support
Figure 1
Figure 2
WARNING
CAUTION WARNING
WARNING

12
Drywall Anchors
Insulated
Staples
Screw 6ABx1-1/2"
Lighted Door Control Button
HARDWARE SHOWN ACTUAL SIZE
To prevent possible SERIOUS INJURY or DEATH from
electrocution:
• Be sure power is not connected BEFORE installing door
control.
• Connect ONLY to 24 VOLT low voltage wires.
To prevent possible SERIOUS INJURY or DEATH from a
closing garage door:
• Install door control within sight of garage door, out of
reach of children at a minimum height of 5 feet, and
away from all moving parts of door.
• NEVER permit children to operate or play with door
control push buttons or remote control transmitters.
• Activate door ONLY when it can be seen clearly, is
properly adjusted, and there are no obstructions to door
travel.
• ALWAYS keep garage door in sight until completely
closed. NEVER permit anyone to cross path of closing
garage door.
WARNING
CAUTION
WARNING
WARNING
Outside Keylock Accessory Connections
To opener terminal screws: White to 2 and
white/red to 1.
Lighted
Door Control
Button
2-Conductor
Bell Wire
KG KG
1
3
9
7
5
1
3
9
7
5
23
1
Opener
Terminal
Screws
Antenna
Back Panel
of Opener
Lighted
Door Control
Terminal Screws
2-Conductor
Bell Wire
WHT
RED
-2
-1
INSTALLATION STEP 6
Install the Door Control
Locate the door control within sight of the door at a
minimum height of 5 feet where small children
cannot reach, and away from all moving parts of the
door and door hardware.
1. Strip 1/4" 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. Be careful not to
pierce the 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 motor unit.
Position the antenna wire as shown.
5. Connect the bell wire by color to the opener
terminal screws: white to 2 and white/red to 1.
6. Use tacks or staples to permanently attach the
entrapment warning label to the wall near the door
control, and the manual release/safety reverse test
in a prominent location on the inside of the
garage door.
NOTE: DO NOT connect the power and operate the
opener at this time. The trolley will travel to the full
open position, but will not return to the close position
until the sensor beam is connected and properly
aligned. See Safety Reversing Sensor instructions
beginning on page 15.

13
INSTALLATION STEP 7
Install the Light
• Install a 75 watt maximum light bulb in the socket.
The light will turn ON and remain lit for
approximately 4-1/2 minutes when power is
connected. Then the light will turn OFF.
• If the bulb burns out prematurely due to vibration,
replace with a "Garage Door Opener" bulb.
NOTE: Use only standard light bulbs. The use of
short neck or speciality light bulbs may overheat the
endpanel or light socket.
INSTALLATION STEP 8
Attach the Emergency Release
Rope and Handle
• Thread one end of the rope through the hole in the
top of the red handle so "NOTICE" reads right side
up as shown. Secure with an overhand knot at
least 1" from the end of the rope to prevent
slipping.
• Thread the other end of the rope through the hole
in the release arm of the outer trolley.
• Adjust rope length so the handle is 6 feet above
the floor. Secure with an overhand knot.
NOTE: If it is necessary to cut the rope, heat seal
the cut end with a match or lighter to prevent
unraveling.
To prevent possible SERIOUS INJURY or DEATH from a
falling garage door:
• If possible, use emergency release handle to
disengage trolley ONLY when garage door is CLOSED.
Weak or broken springs or unbalanced door could
result in an open door falling rapidly and/or
unexpectedly.
• NEVER use emergency release handle unless garage
doorway is clear of persons and obstructions.
NEVER use handle to pull door open or closed. If rope
knot becomes untied, you could fall.
Trolley
NOTICE
Overhand
Knot
Emergency
Release Handle
Rope
Trolley
Release Arm
WARNING
CAUTION WARNING
WARNING
Opener
75 Watt Max.
Light Bulb

14
INSTALLATION STEP 9
Electrical Requirements
To avoid installation difficulties, do not run the
opener at this time.
To reduce the risk of electric shock, your garage door
opener has a grounding type plug with a third
grounding pin. This plug will only fit into a grounding
type outlet. If the plug doesn't fit into the outlet you
have, contact a qualified electrician to install the
proper outlet.
If permanent wiring is required by your local
code, refer to the following procedure.
To make a permanent connection through the 7/8"
hole in the top of the motor unit:
• Remove the motor unit cover screws and set the
cover aside.
• Remove the attached 3-prong cord.
• Connect the black (line) wire to the screw on the
brass terminal; the white (neutral) wire to the
screw on the silver terminal; and the ground wire
to the green ground screw. The opener must be
grounded.
• Reinstall the cover.
To avoid installation difficulties, do not run the
opener at this time.
RIGHT WRONG
To prevent possible SERIOUS INJURY or DEATH from
electrocution or fire:
• Be sure power is not connected to the opener, and
disconnect power to circuit BEFORE removing cover to
establish permanent wiring connection.
• Garage door installation and wiring MUST be in
compliance with all local electrical and building codes.
• NEVER use an extension cord, 2-wire adapter, or
change plug in ANY way to make it fit outlet. Be sure
the opener is grounded.
Ground Tab
Green
Ground Screw
Ground Wire
Black Wire
PERMANENT WIRING
CONNECTION
White Wire
Black
Wire
WARNING
CAUTION WARNING
WARNING

15
Invisible Light Beam
Protection Area
Sensor Beam
6" max.
above floor
Sensor Beam
6" max.
above floor
Facing the door from inside the garage
INSTALLATION STEP 10
Install The Protector System®
The safety reversing sensor must be connected
and aligned correctly before the garage door
opener will move in the down direction.
IMPORTANT INFORMATION ABOUT
THE SAFETY REVERSING SENSOR
When properly connected and aligned, the sensor
will detect an obstacle in the path of its electronic
beam. The sending eye transmits an invisible light
beam to the receiving eye. If an obstruction breaks
the light beam while the door is closing, the door will
stop and reverse to full open position, and the
opener lights will flash 10 times.
The units must be installed inside the garage so that
the sending and receiving eyes face each other
across the door, no more than 6" 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.
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. If installing in
masonry construction, add a piece of wood at each
location to avoid drilling extra holes in masonry if
repositioning is necessary.
The invisible light beam path must be unobstructed.
No part of the garage door (or door tracks, springs,
hinges, rollers or other hardware) may interrupt the
beam while the door is closing.
• Be sure power is not connected to the garage door
opener BEFORE installing the safety reversing sensor.
• To prevent SERIOUS INJURY or DEATH from a closing
garage door:
– Correctly connect and align the safety reversing
sensor. This required safety device MUST NOT be
disabled.
– Install the safety reversing sensor so beam is NO
HIGHER than 6" above garage floor.
WARNING
CAUTION WARNING
WARNING

16
Inside
Garage
Wall
"C" Shaped
Wrap
Mounting Bracket
with Square Holes
Carriage Bolts
1/4-20x1/2"
Lock Nuts 1/4"
Drill 3/8"
Holes
Garage
Door Track
Garage DOOR Track Installation
Mounting Bracket
With Square Holes
Screws
#10-32x3/8"
"C" Wrap
Lock Nuts
#10-32
Garage WALL or DOOR Track Installation
Mounting Bracket
with Slot
Lock Nuts
1/4"-20
Lag Screws
1/4x1-1/2" Carriage Bolts1/4-20x1/2"
(with square shoulder)
Inside
Garage
Wall
"C" Wrap
Mounting Bracket
with Square Holes
Garage WALL Installation
Figure 3
Figure 1
Figure 2
"C" Wrap
Inside
Garage
Wall
Mounting Bracket
with Square Holes
Garage
Floor
Mounting Bracket
with Slot
Alternate Wall Mount
Sensor
with wire
Indicator Light
Indicator Light
Inside
Garage
Wall
Alternate Floor Mount
Mounting Bracket
with Slot
Attach with
concrete anchors
(not provided)
Mounting Bracket
with Square Holes
"C" Wrap
Sensor with wire
Garage
Floor
INSTALLING THE BRACKETS
Figure 1, 2 and 3 show recommended assembly of
bracket(s) and “C” wrap based on the wall
installation of the sensors on each side of the garage
door as shown on page 15, or on the garage door
tracks themselves.
Figure 4 and 5 are variations which may fit your
installation requirements better. Make sure the
wraps and brackets are aligned so the sensors
will face each other across the garage door.
Garage Wall or Door Track Installation
1. Fasten the “C” wraps to the mounting brackets
having square holes, using th hardware shown in
Figure 1.
Garage Wall Installation
2. Connect each assembly to a slotted bracket, using
the hardware show on Figure 2. Note alignment
of brackets for left and right sides of door.
3. Finger tighten the lock nuts.
4. Use bracket mounting holes as a template to
locate and drill (2) 3/16" diameter pilot holes on
both sides of the garage door, 4"-6" above the
floor but not exceeding 6" (see warning on
page 15).
5. Attach bracket assembly with 1/4"x1-1/2" lag
screws as shown in Figure 2.
6. Adjust right and left bracket assemblies to the
same distance out from mounting surface. Make
sure all door hardware obstructions are cleared.
Tighten the nuts securely.
Garage Door Track Installation
Discard slotted bracket. Drill 3/8" holes in each track
and fasten securely with hardware as shown in
Figure 3.
Figure 5
Figure 4
Lag Screw 1/4x1-1/2"
Screw
#10-32x3/8" Lock Nut
1/4"-20
Lock Nut
#10x32 Staples Carriage Bolts
1/4"-20x1/2"
HARDWARE SHOWN ACTUAL SIZE

17
Hex Bolt
1/4-20 x 1-1/2"
"C" Wrap
Sensor
with Wire
Wing
Nut
Indicator
Light
Figure 6
TROUBLESHOOTING THE SAFETY SENSORS
1. If the sending eye indicator light does not glow
steadily after installation, check for:
• Electric power to the opener.
• A short in the white or white/black wires. These
can occur at staples, or at opener connections.
• Incorrect wiring between sensors and opener.
• A broken wire.
2. If the sending eye indicator light glows steadily but
the receiving eye indicator light doesn't:
• Check alignment.
• Check for an open wire to the receiving eye.
3. If the receiving eye indicator light is dim, realign
either sensor.
NOTE: When the invisible beam path is obstructed
or misaligned while the door is closing, the door will
reverse. If the door is already open, it will not close.
The opener lights will blink 10 times. See page 15.
Invisible Light Beam
Protection Area
Sensor
Sensor
Connect Wire to
Opener Terminals
Bell Wire
Bell Wire
Finished
Ceiling
Sensor
Connections
Wall Control
Connections
(dotted line)
OPENER TERMINAL SCREWS
123
Figure 7
MOUNTING AND WIRING THE SAFETY SENSORS
• Center each sensor unit in a "C" wrap with lenses
pointing toward each other across the door
(see Figure 6).
• Secure sensors with the hardware shown. Finger
tighten the wing nut on the receiving eye to allow for
final adjustment. Securely tighten the sending eye
wing nut.
• Run the wires from both sensors to the opener
(see Figure 7). Use insulated staples to secure the
wire to wall and ceiling.
• Strip 1/4" 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.
ALIGNING THE SAFETY SENSORS
•Plug in the opener. The indicator lights in both the
sending and receiving eyes will glow steadily if
wiring connections and alignment are correct.
The sending eye indicator light will glow regardless of
alignment or obstruction. If the indicator light in the
receiving eye is off, dim, or flickering (and the invisible
light beam path is not obstructed), alignment is
required.
• Loosen the sending eye wing nut and readjust,
aiming directly at the receiving eye. Lock in place.
• Loosen the receiving eye wing nut and adjust
sensor until it receives the sender’s beam. When
the green indicator light glows steadily, tighten the
wing nut.

18
Self-Threading
Screw
1/4"-14x5/8"
HARDWARE
SHOWN
ACTUAL SIZE
If your installation doesn't require vertical
reinforcement but does need top and bottom
fastening holes for the door bracket, fasten as shown
in Figure 2.
INSTALLATION STEP 11
Fasten the Door Bracket
A horizontal brace should be long enough to be
secured to 2 vertical supports. A vertical brace
should cover the height of the top panel.
The illustration 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.
• Center the door bracket on the previously marked
vertical guideline used for the header bracket
installation.
• Position the bracket on the face of the door within
the following limits:
A) The top edge of the bracket 2"-4" below the top
edge of the door.
B) The top edge of the bracket directly below any
structural support across the top of the door.
• Mark and drill 3/16" left and right fastening holes.
Secure the bracket as shown in Figure 1 if there is
vertical reinforcement.
To prevent damage to garage door, reinforce inside of
door with angle iron both vertically and horizontally.
WARNING
CAUTION
WARNING
WARNING
Vertical
Guideline
Door
Bracket
Vertical
Guideline Self-Threading
Screw
1/4"-14x5/8"
Door
Bracket
Location
Header
Bracket
Door
Bracket
Door
Bracket
Plate
Inside Edge
of Door or
Reinforcement Board
Horizontal and vertical reinforcement
is needed for lightweight garage doors
(fiberglass, aluminum, steel,
doors with glass panel, etc).
Vertical
Reinforcement
Self-Threading
Screw
1/4"-14x5/8"
Figure 2
Figure 1

19
INSTALLATION STEP 12
Connect Door Arm to Trolley
SECTIONAL DOORS ONLY
• Make sure garage door is fully closed. Pull the
emergency release handle to disconnect the outer
trolley from the inner trolley. Slide the outer trolley
back (away from the door) about 2" as shown in
Figures 1, 2 and 3.
• Figure 1:
– Fasten straight door arm section to outer trolley
with the 5/16"x1" clevis pin. Secure the
connection with a ring fastener.
– Fasten curved section to the door bracket in the
same way, using the 5/16"x1-1/4" clevis pin.
• Figure 2:
– Bring arm sections together. Find two pairs of
holes that line up and join sections. Select holes
as far apart as possible to increase door arm
rigidity.
• Figure 3, Hole alignment alternative:
– If holes in curved arm are above holes in straight
arm, disconnect straight arm. Cut about 6" from
the solid end. Reconnect to trolley with cut end
down as shown.
– Bring arm sections together.
– Find two pairs of holes that line up and join with
bolts, lock washers and nuts.
• Proceed to Adjustment Step 1, page 20. Trolley will
re-engage automatically when opener is operated.
Ring
Fastener
Door
Bracket
Clevis Pin
5/16"x1"
Curved
Door Arm
Straight
Door Arm
Clevis Pin
5/16"x1"
Inner Trolley
Outer Trolley
Lock
Washers
5/16"
Nuts
5/16"-18
Door Bracket
Bolts
5/16"-18x7/8"
Emergency
Release
Handle
Lock
Washers
5/16"
Nuts
5/16"-18
Bolts
5/16"-18x7/8"
Cut This End
Figure 1
Figure 2
Figure 3
Lock Washer 5/16"
Nut 5/16"-18 Ring Fastener
Hex Bolt
5/16"-18x7/8"
Clevis Pin
5/16"x1"
HARDWARE SHOWN ACTUAL SIZE

20
ADJUSTMENT STEP 1
Adjust the UP and DOWN Travel
Limits
Limit adjustment settings regulate the points at which
the door will stop when moving up or down.
To operate the opener, press the Door Control push
bar. Run the opener through a complete travel cycle.
• Does the door open and close completely?
• Does the door stay closed and not reverse
unintentionally when fully closed?
If your door passes both of these tests, no limit
adjustments are necessary unless the reversing test
fails (Adjustment Step 3, page 22).
Adjustment procedures are outlined below. Read the
procedures carefully before proceeding to
Adjustment Step 2. Use a screwdriver to make limit
adjustments. Run the opener through a complete
travel cycle after each adjustment.
NOTE: Repeated operation of the opener during
adjustment procedures may cause the motor to
overheat and shut off. Simply wait 15 minutes and
try again.
NOTE: If anything interferes with the door’s upward
travel, it will stop. If anything interferes with the
door’s downward travel (including binding or
unbalanced doors), it will reverse.
HOW AND WHEN TO ADJUST THE LIMITS
• If the door does not open completely but opens
at least five feet:
Increase up travel. Turn the UP limit adjustment
screw clockwise. One turn equals 2" of travel.
NOTE: To prevent the trolley from hitting the cover
protection bolt, keep a minimum distance of 2-4"
between the trolley and the bolt.
• If door does not open at least 5 feet:
Adjust the UP (open) force as explained in
Adjustment Step 2.
• If the door does not close completely:
Increase down travel. Turn the down limit
adjustment screw counterclockwise. One turn
equals 2" of travel.
If door still won't close completely and the trolley
bumps into the pulley bracket (page 4), try
lengthening the door arm (page 19) and
decreasing the down limit.
• If the opener reverses in fully closed position:
Decrease down travel. Turn the down limit
adjustment screw clockwise. One turn equals 2"
of travel.
Without a properly installed safety reversal system,
persons (particularly small children) could be
SERIOUSLY INJURED or KILLED by a closing garage
door.
• Incorrect adjustment of garage door travel limits will
interfere with proper operation of safety reversal
system.
• If one control (force or travel limits) is adjusted, the
other control may also need adjustment.
• After ANY adjustments are made, the safety reversal
system MUST be tested. Door MUST reverse on
contact with 1-1/2" high object (or 2x4 laid flat) on
floor.
• If the door reverses when closing and there is
no visible interference to travel cycle:
If the opener lights are flashing, the Safety
Reversing Sensors are either not installed,
misaligned, or obstructed. See Troubleshooting,
page 17.
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.
Limit
Adjustment
Screws
Adjustment Label
Left Side
Panel
Cover
Protection
Bolt
2-4"
WARNING
CAUTION WARNING
WARNING
To prevent damage to vehicles, be sure fully open door
provides adequate clearance.
WARNING
CAUTION
WARNING
WARNING