Chamberlain LiftMaster 3275C User manual

The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
www.liftmaster.com
GARAGE DOOR OPENER
Model 3275C
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.
®

2
When you see these Safety Symbols and Signal Words on the
following pages, they will alert you to the possibility of serious
injury or death if you do not comply with the warnings that
accompany them. The hazard may come from something
mechanical or from electric shock. Read the warnings carefully.
When you see this Signal Word on the following pages, it will
alert you to the possibility of damage to your garage door and/or
the garage door opener if you do not comply with the cautionary
statements that accompany it. Read them carefully.
INTRODUCTION
Safety Symbol and Signal Word Review
This garage door opener has been designed and tested to offer safe service provided it is installed, operated, maintained and tested in
strict accordance with the instructions and warnings contained in this manual.
Mechanical
Electrical
Introduction 2-5
Safety symbol and signal word review . . . . . . . . . . . . . . . . . . . . . 2
Preparing your garage door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Tools needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Carton inventory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installation hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Assembly 6-7
Attach the rail to the motor unit . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Attach the chain spreader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Tighten the chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Installation 7-22
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Install the door control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Install the light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Attach the emergency release rope and handle . . . . . . . . . . . . . 14
Electrical requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Install the Protector System®. . . . . . . . . . . . . . . . . . . . . . . . .16-18
Fasten the door bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19-20
Connect the door arm to the trolley . . . . . . . . . . . . . . . . . . . .21-22
Adjustment 23-25
Adjust the travel limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Adjust the force . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Test the safety reversal system. . . . . . . . . . . . . . . . . . . . . . . . . . 25
Test the Protector System®. . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Operation 26-30
Operation safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Using your garage door opener . . . . . . . . . . . . . . . . . . . . . . . . . 26
Using the wall-mounted door control . . . . . . . . . . . . . . . . . . . . . 27
To open the door manually. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Care of your garage door opener . . . . . . . . . . . . . . . . . . . . . . . . 28
Having a problem? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Diagnostic chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Programming 31-32
To add or reprogram a hand-held remote control . . . . . . . . . . . 31
To erase all codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3-Button remotes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
To add, reprogram or change
a Keyless Entry PIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Repair Parts 33-34
Rail assembly parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Installation parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Motor unit assembly parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Accessories 35
Repair Parts and Service 36
Warranty 36
TABLE OF CONTENTS

3
To prevent damage to garage door and opener:
• ALWAYS disable locks BEFORE installing and operating the
opener.
• ONLY operate garage door opener at 120V, 60 Hz to avoid
malfunction and damage.
To prevent possible SERIOUS INJURY OR DEATH:
• ALWAYS call a trained door systems technician if garage
door binds, sticks or is out of balance. An unbalanced garage
door may not reverse when required.
• NEVER try to loosen, move or adjust garage door, door
springs, cables, pulleys, brackets or their hardware, ALL of
which are under EXTREME tension.
• Disable ALL locks and remove ALL ropes connected to
garage door BEFORE installing and operating garage door
opener to avoid entanglement.
Preparing your garage door
Before you begin:
• Disable locks.
• Remove any ropes connected to garage door.
• Complete the following test to make sure your garage door is
balanced and is not sticking or binding:
1. Lift the door about halfway as shown. Release the door. If
balanced, it should stay in place, supported entirely by its
springs.
2. Raise and lower the door to see if there is any binding or
sticking.
If your door binds, sticks, or is out of balance, call a trained door
systems technician.
Tools needed
During assembly, installation and adjustment of the opener,
instructions will call for hand tools as illustrated below.
Pliers
Wire Cutters
Claw Hammer
Hack Saw
Screwdriver Adjustable End Wrench
1/2" and 3/8" Sockets
and Wrench
Drill
Tape Measure
2
1
Stepladder
Pencil
3/16", 5/16" and
5/32" Drill Bits
Carpenter's
Level (Optional)
Sectional Door
One-Piece Door

4
FINISHED CEILING
Support bracket
& fastening
hardware is required.
See page 12.
Slack in chain tension
is normal when
garage door is closed.
Safety
Reversing Sensor
Header
Wall
Access
Door
Safety
Reversing Sensor
Gap between floor and bottom of
door must not exceed 1/4" (6 mm)
Wall-
mounted
Door
Control
Motor Unit
ONE-PIECE DOOR WITHOUT TRACK
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.
Access
Door
Safety
Reversing Sensor
Safety
Reversing Sensor
Slack in chain tension is normal when
garage door is closed.
Gap between floor
and bottom of door
must not exceed 1/4" (6 mm)
ONE-PIECE DOOR WITH TRACK
Safety Reversing Sensor
Support bracket &
fastening hardware
is required.
See page 12.
— — — — — — — —
Header Wall
FINISHED CEILING
Torsion
Spring
OR
Safety
Reversing
Sensor
Gap between floor
and bottom of door
must not exceed 1/4" (6 mm)
Access
Door
Wall-
mounted
Door
Control
Horizontal and vertical reinforcement
is needed for lightweight garage doors
(fiberglass, steel, aluminum, door with
glass panels, etc.). See page 19 for details.
Motor Unit
Extension Spring
Slack in chain tension
is normal when
garage door is closed.
Vertical
Centerline
of Garage Door
OR
One-Piece Door-Extension Spring
Header Wall
Door Track
SECTIONAL DOOR INSTALLATION

5
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
Straight Door
Arm Section
Curved Door
Arm Section
Safety Labels
and
Literature
Header Bracket
UP
CEILING MOUNT ONLY
2 Conductor Bell Wire
White & White/Red
Remote Control
Transmitter Visor Clip
Door Bracket
SECURITY✚®
3-Button Remote Control
Multi-Function
Door Control Panel
LOCK
LIGHT
The Protector System®
(2) Safety Reversing Sensors
(1 Sending Eye and 1 Receiving Eye)
with 2-Conductor White & White/Black
Bell Wire attached
Safety Sensor
Bracket (2)
One-Piece
T-rail
Styrofoam
Chain
Pulley Bracket
Trolley
Chain
Motor Unit with Light Lenses
Chain Spreader
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)
Nut 5/16"-18 (4)
Lock Washer 5/16" (4)
Screw 6ABx1-1/4" (2)
Screw 6-32x1" (2)
Self-Threading Screw 1/4"-14x5/8" (2)
Insulated Staples (10)
Ring Fastener (3)
Drywall Anchors (2)
Rail Grease
Carriage Bolt 1/4"-20x1/2" (2)
Wing Nut 1/4"-20 (2)
Rope
Handle

6
Washered Bolt
5/16"-18x1/2"
Styrofoam
T-rail
Hole
Lock Nut
ASSEMBLY STEP 1
Attach the to the Motor Unit
To avoid installation difficulties, do not run the garage door
opener until instructed to do so.
• Remove the bolt and lock nut from the top of the motor unit.
• Place rail onto the bolt mounted on the motor unit and align
the back hole with the hole in the top of the unit.
• Fasten rail with the washered bolt and lock nut previously
removed. Tighten securely. Remember to use only these
bolts/fasteners! Any other bolts/fasteners will cause serious
damage to the opener.
• Cut tape from T-rail, chain and styrofoam.
• REMOVE STYROFOAM.
ASSEMBLY STEP 2
Attach the Chain Spreader
• Attach chain spreader to the motor unit with two screws.
• Position chain over chain spreader and into the slot of the
spreader. Wrap chain around the sprocket. If necessary, loosen
the outer nut on the trolley to obtain more chain slack.
To avoid possible SERIOUS INJURY to fingers from moving
garage door opener:
• ALWAYS keep hand clear of sprocket while operating opener.
• Securely attach chain spreader BEFORE operating.
Chain
Spreader
Motor Unit
Sprocket
Hex Screws
8-32x7/16
Chain
Spreader
Motor Unit
Sprocket
To avoid SERIOUS damage to garage door opener, use ONLY
those bolts/fasteners mounted in the top of the opener.

7
IMPORTANT INSTALLATION INSTRUCTIONS
Lock
Washer
To Tighten Outer Nut
Inner Nut
Trolley
Chain
Base of Rail
1/2" (13 mm)
To Tighten
Inner Nut
Outer Nut
Mid Length of Rail
INSTALLATION
ASSEMBLY STEP 3
Tighten the Chain
• Spin the inner nut and lock washer down the trolley threaded
shaft, away from the trolley.
• To tighten the chain, turn outer nut in the direction shown
(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.
Sprocket noise can result if chain is too loose.
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.
NOTE: During future maintenance, ALWAYS pull the emergency
release handle to disconnect trolley before adjusting chain. 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.
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.
Figure 1
Figure 2
WARNING
WARNING
WARNINGWARNING

8
INSTALLATION STEP 1
Determine the Header Bracket Location
Installation procedures vary according to garage door types.
Follow the instructions which apply to your door.
1. Close the door and mark the inside vertical centerline of the
garage door.
2. Extend the line onto the header wall above the door.
You can fasten the header bracket within 4 feet (1.22 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 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.
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.
• 8" (20 cm) above the high point for one-piece door without
track.
This height will provide travel clearance for the top edge of the
door.
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.
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
Sectional door with curved track
Highest Point
of Travel
Door
2" (5 cm)
One-piece door with horizontal track
Door
Track
Header Wall
Highest Point
of Travel
2" (5 cm)
Track
Header Wall
Vertical Centerline
of Garage Door
Level
(optional)
2x4
2x4
Structural
Supports
OPTIONAL
CEILING
MOUNT
FOR
HEADER
BRACKET
Unfinished
Ceiling
Door
Jamb
Hardware
One-piece door without track:
jamb hardware
8" (20 cm)
Highest
Point
of Travel Door
Pivot
8" (20 cm)
One-piece door without track:
pivot hardware
Highest
Point
of Travel
Header Wall
Header Wall

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
Vertical
Centerline of
Garage Door
Header
Wall
Garage
Door
UP
CEILING MOUNT ONLY
Wall Mounting Holes
Optional
Wall Mounting Holes
The nail hole is for
positioning only.
You must use lag screws
to mount the header bracket.
UP
CEILING MOUNT ONLY
Door Spring
Header
Bracket
2x4
Structural
Support
Vertical
Centerline of
Garage Door
Horizontal
Line
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
Vertical
Centerline
of Garage Door
Header Wall
– Finished Ceiling –
Header
Bracket
6" (15 cm)
Maximum
Vertical
Centerline
of Garage Door
Door
Spring
CEILING HEADER BRACKET INSTALLATION
• Extend the vertical centerline onto the ceiling as shown.
• Center the bracket on the vertical mark, no more than
6" (15 cm) from the wall. Make sure the arrow is pointing
toward the wall. The bracket can be mounted flush against the
ceiling when clearance is minimal.
• Mark the side holes. Drill 3/16" pilot holes and fasten bracket
securely to a structural support with the hardware provided.

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

11
ONE-PIECE DOOR WITHOUT TRACK
A 2x4 on its side 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 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.
INSTALLATION STEP 4
Position the Opener
Follow instructions which apply to your door type as illustrated.
SECTIONAL DOOR OR ONE-PIECE DOOR WITH TRACK
A 2x4 laid flat is convenient for setting an ideal
door-to-rail distance.
• 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.
• 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
To prevent damage to garage door, rest garage door opener
rail on 2x4 placed on top section of door.
Rail
Door 2x4 is used to determine
the correct mounting height
from ceiling.
Header
Bracket
Top of Door
2x4 is used to determine
the correct mounting height
from ceiling.

12
Measure
Distance Lag Screws
5/16"-18x1-7/8"
Structural
Supports
Bracket
(Not Provided)
Lag Screws
5/16"-18x1-7/8"
(Not Provided)
Bolt 5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18
FINISHED CEILING
Hidden
Support
Bolt 5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18
Bolt 5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18
Bolt 5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18
Lag Screws
5/16"-18x1-7/8"
(Not Provided)
Bolt 5/16"-18x7/8"
Lock Washer 5/16"
Nut 5/16"-18
FINISHED CEILING
INSTALLATION STEP 5
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.
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.
NOTE: DO NOT connect power to opener at this time.
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.
Lag Screw 5/16"-18x1-7/8"
Hex Bolt
5/16"-18x7/8" Nut 5/16"-18 Lock Washer 5/16"
HARDWARE SHOWN ACTUAL SIZE
Figure 1
Figure 2
Figure 3

13
To prevent possible SERIOUS INJURY OR DEATH from
electrocution:
• Be sure power is not connected BEFORE installing door
control.
• Connect ONLY to 24 VOLT low voltage wires.
To prevent possible SERIOUS INJURY OR DEATH from a
closing garage door:
• Install door control within sight of garage door, out of reach
of children at a minimum height of 5 feet (1.5 m), and away
from ALL moving parts of door.
• NEVER permit children to operate or play with door control
push buttons or remote control transmitters.
• Activate door ONLY when it can be seen clearly, is properly
adjusted, and there are no obstructions to door travel.
• ALWAYS keep garage door in sight until completely closed.
NEVER permit anyone to cross path of closing garage door.
INSTALLATION STEP 6
Install the Door Control
Locate door control within sight of door at a minimum height of
5 feet (1.5 m) where small children cannot reach, and away from
moving parts of door and door hardware. The installation surface
must be smooth and flat. If installing into drywall (Figure 1), drill
5/32" holes and use anchors provided. For pre-wired installations
(as in new home construction), it may be mounted to a single
gang box (Figure 2).
NOTE: After installation, a green or amber indicator light behind
the cover will indicate proper connection. If not lit, the Lock and
Light features will not function (reverse wires to correct).
1. Strip 7/16" (11 mm) of insulation from one end of bell wire and
connect to the two screw terminals on back of door control by
color: white wire to WHT and white/red wire to the RED
(Figure 3).
2. Remove cover by gently prying at slot in the top of the cover
with a small flat head screwdriver (Figure 4). Fasten with
6ABx1-1/4" self-tapping screws (drywall installation) or
6-32x1" machine screws (into gang box) as follows:
• Drill and install bottom screw, allowing 1/8"(3 mm) to
protrude above wall surface.
• Position bottom of door control on screw head and slide
down to secure. Adjust screw for snug fit.
• Install top screw with care to avoid cracking plastic housing.
Do not overtighten.
• Insert bottom tabs and snap on cover.
NOTE: The push bar may stick if the door control is not
mounted on a smooth surface. If a click is not heard when
pressing the push bar, loosen the two mounting screws or
relocate the door control to a smoother surface.
3. (Standard installation only) Run bell wire up wall and across
ceiling to motor unit. Use insulated staples to secure wire in
several places. Do not pierce wire with a staple, creating a
short or open circuit.
4. Strip 7/16" (11 mm) of insulation from end of bell wire.
Connect bell wire to the quick-connect terminals as follows:
white to white and white/red to red (Figure 5).
NOTE: When connecting multiple door controls to the opener,
twist same color wires together. Insert wires into quick-connect
holes: white to white and red/white to red.
5. Use tacks or staples to permanently attach entrapment warning
label to wall near door control, and manual release/safety
reverse test label in a prominent location on inside of garage
door.
NOTE: DO NOT connect power and operate 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.
To release or insert wire,
push in tab with screwdriver tip
Door Control
Connections
7/16"
Strip wire 7/16"
Red Grey
White
LOCK
LIGHT
Figure 4 REMOVE COVER
Bell Wire
Terminal
Screws
Bottom Mounting Hole
Top Mounting Hole
Drywall Anchors
Insulated
Staples
Screw 6ABx1-1/4"
(standard installation)
Screw 6-32x1"
(pre-wired)
HARDWARE SHOWN ACTUAL SIZE
Figure 2
To Replace
Insert Bottom Tabs First
PRE-WIRED
INSTALLATION
LOCK
LIGHT
LOCK
LIGHT
To Replace
Insert Bottom Tabs First
Figure 1 STANDARD
INSTALLATION
24 Volt
2-Conductor
Bell Wire in
Gang Box
Figure 5
Figure 4
KG
1
3
9
7
5
KG
1
3
9
7
5
Figure 3
Figure 1 Figure 2
MULTI-FUNCTION
DOOR CONTROL (BACK)

14
INSTALLATION STEP 7
Install the Light
• Press the release tabs on both sides of lens. Gently rotate lens
back and downward until the lens hinge is in the fully open
position. Do not remove the lens.
• Install up to a 100 watt maximum light bulb in each socket.
The light will turn ON and remain lit for approximately 4-1/2
minutes when power is connected. Then the lights will turn
OFF.
• Reverse the procedure to close the lens.
• Use A19, standard neck garage door opener bulbs for
replacement.
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" (2.5 cm) from the end of the
rope to prevent slipping.
• Thread the other end of the rope through the hole in the
release arm of the outer trolley.
• Adjust rope length so the handle is 6 feet (1.83 m) above the
floor. 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.
Trolley
NOTICE
Overhand
Knot
Emergency
Release Handle
Rope
Trolley
Release Arm
To prevent possible SERIOUS INJURY OR DEATH from a
falling garage door:
• If possible, use emergency release handle to disengage
trolley ONLY when garage door is CLOSED. Weak or broken
springs or unbalanced door could result in an open door
falling rapidly and/or unexpectedly.
• NEVER use emergency release handle unless garage
doorway is clear of persons and obstructions.
• NEVER use handle to pull door open or closed. If rope knot
becomes untied, you could fall.
Lens
Hinge
100 Watt (Max)
Standard Light Bulb
Release Tab
100 Watt (Max)
Standard Light Bulb
To prevent possible OVERHEATING of the endpanel or light
socket:
• DO NOT use short neck or specialty light bulbs.
• DO NOT use halogen bulbs. Use ONLY incandescent.
To prevent damage to the opener:
• DO NOT use bulbs larger than 100W.
• ONLY use A19 size bulbs.

15
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

16
Invisible Light Beam
Protection Area
Safety Reversing Sensor
6" (15 cm) max. above floor Safety Reversing Sensor
6" (15 cm) max. above floor
Facing the door from inside the garage.
INSTALLATION STEP 10
Install The Protector System®
The safety reversing sensor must be connected and aligned
correctly before the garage door opener will move in the down
direction.
IMPORTANT INFORMATION ABOUT THE SAFETY REVERSING
SENSOR
When properly connected and aligned, the sensor will detect an
obstacle in the path of its electronic beam. The sending eye (with
an amber indicator light) transmits an invisible light beam to the
receiving eye (with a green indicator light). If an obstruction
breaks the light beam while the door is closing, the door will stop
and reverse to full open position, and the opener lights will flash
10 times.
The units must be installed inside the garage so that the sending
and receiving eyes face each other across the door, no more than
6" (15 cm) above the floor. Either can be installed on the left or
right of the door as long as the sun never shines directly into the
receiving eye lens.
The mounting brackets are designed to clip onto the track of
sectional garage doors without additional hardware.
If it is necessary to mount the units on the wall, the brackets
must be securely fastened to a solid surface such as the wall
framing. Extension brackets (see Accessories) are available if
needed. If installing in masonry construction, add a piece of
wood at each location to avoid drilling extra holes in masonry if
repositioning is necessary.
The invisible light beam path must be unobstructed. No part of
the garage door (or door tracks, springs, hinges, rollers or other
hardware) may interrupt the beam while the door is closing.
Be sure power is not connected to the garage door opener
BEFORE installing the safety reversing sensor.
To prevent SERIOUS INJURY OR DEATH from a closing
garage door:
• Correctly connect and align the safety reversing sensor.
This required safety device MUST NOT be disabled.
• Install the safety reversing sensor so beam is NO HIGHER
than 6" (15 cm) above garage floor.

17
DOOR TRACK MOUNT (RIGHT SIDE)
Indicator
Light
Lens
Lip
Sensor
Bracket
Door
Track
FLOOR MOUNT (RIGHT SIDE)
WALL MOUNT (RIGHT SIDE)
Indicator
Light
Sensor
Bracket
Lens
Extension
Bracket
(See Accessories)
Inside
Garage
Wall
(Provided with
Extension
Bracket)
(Provided with
Extension Bracket)
Figure 1
Figure 2
Figure 3
Figure 4
WALL MOUNT (RIGHT SIDE)
Attach with
Concrete Anchors
(Not Provided)
Inside
Garage
Wall
Sensor
Bracket
Lens
Indicator
Light
Inside
Garage
Wall
Indicator
Light Sensor
Bracket
Lens
Lag Screws
(Not Provided)
Fasten Wood Block to Wall with
Lag Screws (Not Provided)
INSTALLING THE BRACKETS
Be sure power to the opener is disconnected. Install and align
the brackets so the sensors will face each other across the garage
door, with the beam no higher than 6" (15 cm) above the floor.
They may be installed in one of three ways, as follows.
Garage door track installation (preferred) (Figure 1):
• Slip the curved arms over the rounded edge of each door track,
with the curved arms facing the door. Snap into place against
the side of the track. It should lie flush, with the lip hugging the
back edge of the track, as shown in Figure 1.
If your door track will not support the bracket securely, wall
installation is recommended.
Wall installation (Figures 2 & 3):
• Place the bracket against the wall with curved arms facing the
door. Be sure there is enough clearance for the sensor beam to
be unobstructed.
• If additional depth is needed, an extension bracket
(see Accessories) or wood blocks can be used.
• Use bracket mounting holes as a template to locate and drill
(2) 3/16" diameter pilot holes on the wall at each side of the
door, no higher than 6" (15 cm) above the floor.
• Attach brackets to wall with lag screws (not provided).
• If using extension brackets or wood blocks, adjust right and
left assemblies to the same distance out from the mounting
surface. Make sure all door hardware obstructions are cleared.
Floor installation (Figure 4):
• Use wood blocks or extension brackets (see Accessories) to
elevate sensor brackets so the lenses will be no higher than
6" (15 cm) above the floor.
• Carefully measure and place right and left assemblies at the
same distance out from the wall. Be sure all door hardware
obstructions are cleared.
• Fasten to the floor with concrete anchors as shown.
Wing Nut
1/4"-20
Staples
Carriage Bolt
1/4"-20x1/2"
HARDWARE SHOWN ACTUAL SIZE
Figure 1
Figure 2
Figure 3
Figure 4

18
Invisible Light Beam
Protection Area
Safety Reversing Sensor
Safety Reversing Sensor
Connect Wire to
Opener Quick-Connect Terminals
Bell Wire
Bell Wire Finished
Ceiling
Quick-Connect Terminals
3. To release or insert
wire, push in tab with
screwdriver tip
1. Strip wire 7/16"
(11 mm)
2. Twist like colored
wires together
7/16"
(11mm)
Red Grey
White
Carriage Bolt
1/4"-20x1/2" Lens
Wing Nut
1/4"-20
Figure 5
MOUNTING AND WIRING THE SAFETY REVERSING SENSORS
• Slide a 1/4"-20x1/2" carriage bolt head into the slot on each
sensor. Use wing nuts to fasten sensors to brackets, with
lenses pointing toward each other across the door. Be sure the
lens is not obstructed by a bracket extension (Figure 5).
• Finger tighten the wing nuts.
• Run the wires from both sensors to the opener. Use insulated
staples to secure wire to wall and ceiling.
• Strip 7/16" (11 mm) of insulation from each set of wires.
Separate white and white/black wires sufficiently to connect to
the opener quick-connect terminals. Twist like colored wires
together. Insert wires into quick-connect holes: white to white
and white/black to grey (Figure 6).
ALIGNING THE SAFETY REVERSING SENSORS
• Plug in the opener. The indicator lights in both the sending and
receiving eyes will glow steadily if wiring connections and
alignment are correct.
The sending eye amber indicator light will glow regardless of
alignment or obstruction. If the green indicator light in the
receiving eye is off, dim, or flickering (and the invisible light beam
path is not obstructed), alignment is required.
• Loosen the sending eye wing nut and readjust, aiming directly
at the receiving eye.Lock in place.
• Loosen the receiving eye wing nut and adjust sensor until it
receives the sender’s beam. When the green indicator light
glows steadily, tighten the wing nut.
TROUBLESHOOTING THE SAFETY REVERSING SENSORS
1. If the sending eye indicator light does not glow steadily after
installation, check for:
• Electric power to the opener.
• A short in the white or white/black wires. These can occur at
staples, or at 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 16.
Figure 6

19
Fiberglass, aluminum or lightweight steel garage doors WILL
REQUIRE reinforcement BEFORE installation of door bracket.
Contact your door manufacturer for reinforcement kit.
INSTALLATION STEP 11
Fasten the Door Bracket
Follow instructions which apply to your door type as illustrated
below or on the following page.
A horizontal reinforcement brace should be long enough to be
secured to two or three vertical supports. A vertical
reinforcement brace should cover the height of the top panel.
Figure 1 shows one piece of angle iron as the horizontal brace.
For the vertical brace, 2 pieces of angle iron are used to create
a U-shaped support. The best solution is to check with your
garage door manufacturer for an opener installation door
reinforcement kit.
NOTE: Many door reinforcement kits provide for direct
attachment of the clevis pin and door arm. In this case you will
not need the door bracket; proceed to Step 12.
SECTIONAL DOORS
1. Center the door bracket on the previously marked vertical
centerline used for the header bracket installation. Note correct
UP placement, as stamped inside the bracket.
2. Position the top edge of the bracket 2"-4" (5-10 cm) below the
top edge of the door, OR directly below any structural support
across the top of the door.
3. Mark, drill holes and install as follows, depending on your
door’s construction:
Metal or light weight doors using a vertical angle iron brace
between the door panel support and the door bracket:
• Drill 3/16" fastening holes. Secure the door bracket using the
two 1/4"-14x5/8" self-threading screws (Figure 2A).
• Alternately, use two 5/16" bolts, lock washers and nuts
(not provided) (Figure 2B).
Metal, insulated or light weight factory reinforced doors:
• Drill 3/16" fastening holes. Secure the door bracket using the
self-threading screws (Figure 3).
Wood Doors:
• Use top and bottom or side to side door bracket holes. Drill
5/16" holes through the door and secure bracket with 5/16"x2"
carriage bolts, lock washers and nuts (not provided) (Figure 4).
NOTE: The 1/4"-14x5/8" self-threading screws are not intended for
use on wood doors.
Vertical
Centerline
of Garage
Door
Door
Bracket
Location
Header
Bracket
HORIZONTAL AND VERTICAL
REINFORCEMENT IS NEEDED
FOR LIGHTWEIGHT GARAGE
DOORS (FIBERGLASS,
ALUMINUM, STEEL, DOORS
WITH GLASS PANEL, ETC.).
(NOT PROVIDED)
Door
Bracket
Vertical
Centerline
of Garage Door
UP
Vertical
Reinforcement
Self-Threading
Screw
1/4"-14x5/8"
Self-Threading
Screw
1/4"-14x5/8"
Door
Bracket
Nut
5/16"-18
Bolt
5/16"-18x2"
Lock Washer
5/16"
UP
Vertical
Reinforcement
(Not Provided)
Vertical
Centerline
of Garage Door
UP
Self-Threading
Screw
1/4"-14x5/8"
Vertical
Centerline
of Garage Door
UP
Inside Edge
of Door or
Reinforcement Board
Bolt
5/16"x2"
(Not Provided)
Vertical
Centerline
of Garage
Door
Figure 1
Figure 2A
Figure 3
Figure 4
Figure 2B
HARDWARE
SHOWN ACTUAL
SIZE

20
Header Wall
Vertical
Centerline of
Garage Door
Finished Ceiling
Optional
Placement
of Door
Bracket
Header
Bracket
Door
Bracket
2x4 Support
For a door with no exposed framing,
or for the optional installation, use
lag screws 5/16"x1-1/2" (Not Provided)
to fasten door bracket.
METAL DOOR
Top of Door
(Inside
Garage)
Door
Bracket
Optional
Placement
Top Edge
of Door
Self-Threading
Screw
1/4"-14x5/8"
Door
Bracket
Top of Door
(Inside
Garage)
Carriage Bolt
5/16"x2"
(Not Provided)
Optional
Placement
Lock
Washer
5/16"
Nut
5/16"-18
Top Edge
of Door
WOOD DOOR
HORIZONTAL AND VERTICAL
REINFORCEMENT IS NEEDED
FOR LIGHTWEIGHT GARAGE
DOORS (FIBERGLASS,
ALUMINUM, STEEL, DOORS
WITH GLASS PANEL, ETC.).
(NOT PROVIDED)
ONE-PIECE DOORS
Please read and comply with the warnings and reinforcement
instructions on the previous page. They apply to one-piece doors
also.
• Center the door bracket on the top of the door, in line with the
header bracket as shown. Mark either the left and right, or the
top and bottom holes.
• Metal Doors: Drill 3/16" pilot holes and fasten the bracket with
the 1/4"-14x5/8" self-threading screws provided.
• Wood Doors: Drill 5/16" holes and use 5/16"x2" carriage bolts,
lock washers and nuts (not provided) or 5/16"x1-1/2" lag
screws (not provided) depending on your installation needs.
NOTE: The door bracket may be installed on the top edge of the
door if required for your installation. (Refer to the dotted line
optional placement drawing.)
Self-Threading Screw
1/4"-14x5/8"
HARDWARE SHOWN
ACTUAL SIZE