Chamberlain 3800C User manual

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®and cable tension monitor are
connected and properly aligned.
■Periodic checks of the opener are required to ensure safe operation.
■The model number label is located behind the hinged door of your opener.
GARAGE DOOR OPENER
Model 3800C
For Residential Sectional Doors With
Torsion Assemblies Only
The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
www.liftmaster.com
®
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2
INTRODUCTION
Safety Symbol Review
and Signal Word Review
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.
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
Introduction 2-5
Safety symbol review and signal word review . . . . . . . .2
Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Preparing your garage door . . . . . . . . . . . . . . . . . . . . . .4
Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Carton inventory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Hardware inventory . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Assembly 6
Attach the collar to the motor unit . . . . . . . . . . . . . . . . . .6
Attach mounting bracket to the motor unit . . . . . . . . . . .6
Installation 7-16
Installation safety instructions . . . . . . . . . . . . . . . . . . . . .7
Position the opener . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Attach the emergency release rope and handle . . . . . . .8
Install the power door lock . . . . . . . . . . . . . . . . . . . . . . .8
Attach the cable tension monitor (Required) . . . . . . . . . .9
Install the control console . . . . . . . . . . . . . . . . . . . . . . .10
Install remote light . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Electrical requirements . . . . . . . . . . . . . . . . . . . . . . . . .12
Mount the battery backup unit (BBU) . . . . . . . . . . . . . .13
Install The Protector System®. . . . . . . . . . . . . . . . . .14-16
Adjustment 17-20
Program the travel limits . . . . . . . . . . . . . . . . . . . . . . . .17
Setting the force . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Test the safety reversal system . . . . . . . . . . . . . . . . . . .19
Test The Protector System®. . . . . . . . . . . . . . . . . . . . . .19
Test cable tension monitor . . . . . . . . . . . . . . . . . . . . . .20
Test power door lock . . . . . . . . . . . . . . . . . . . . . . . . . . .20
To open door manually . . . . . . . . . . . . . . . . . . . . . . . . .20
Operation 21-25
Operation safety instructions . . . . . . . . . . . . . . . . . . . . .21
Using your garage door opener . . . . . . . . . . . . . . . . . .21
Using the wall-mounted control console . . . . . . . . . . . .22
Care of your opener . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Having a problem? (Troubleshooting) . . . . . . . . . . .23-24
Diagnostic chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Programming 26-28
To add or reprogram a hand-held remote control . . . . .26
To erase all codes from motor unit memory . . . . . . . . .26
3-Button remote . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
To add, reprogram or change
a keyless entry PIN . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Reprogramming light or additional light . . . . . . . . . . . .28
Repair Parts 29-30
Installation parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Motor unit assembly parts . . . . . . . . . . . . . . . . . . . . . . .30
Accessories 31
Repair Parts and Service 32
Warranty 32
TABLE OF CONTENTS

Safety
Reversing Sensor
Safety
Reversing
Sensor
Torsion Spring
Motor unit
Wall-mounted
Control Console
Access Door
Gap between floor
and bottom of door must not exceed 1/4" (6 mm).
Power
Door Lock
Cable Tension
Monitor Remote Light
Drum
3
Planning
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 as you proceed with the installation of your opener.
Depending on your requirements, there are several
installation steps which may call for materials or
hardware not included in the carton.
This opener is compatible with:
• Doors that use a torsion bar, springs, and a door no
more than 14' (4.2 m) high.
• 4"-6" (10 cm - 15 cm) drums, not to be used on
tapered drums over 6" (15 cm).
• High lift and standard lift sectional doors up to 14'
(4.2 m) high.
• Doors up to 18' wide.
• Doors up to 180 sq. ft.
• 1" (2.5 cm) torsion bar only.
• Review or inspect proposed installation area. Opener
can be installed on left or right side of door. Select the
side that meets the requirements listed below.
- Must have minimum of 2-1/2" (6.4 cm) between the
garage wall and the center of the torsion bar.
- Must have minimum of 3" (7.6 cm) between the
ceiling and the center of torsion bar.
- Must have minimum of 8" (20.3 cm) between the
side garage wall (or obstruction) and the end of
torsion bar.
• The torsion bar must extend at least 1" to 5" (2.5 cm to
12 cm) past the bearing plate.
• An electric outlet is required within 6' (1.8 m) of the
installation area. If outlet does not exist, contact a
qualified electrician.
• Depending upon garage construction, extension
brackets or wood blocks may be needed to install
safety reversing sensors.
• Alternate floor mounting of the safety reversing
sensors will require hardware not provided.
• A model 475LMC EverChargeTM Battery Backup
System is strongly recommended if there is no access
door to the garage, as this opener cannot be used in
conjunction with an external emergency release
mechanism.
• Any gap between the floor and the bottom of the door
must not exceed 1/4" (6 mm). Otherwise the safety
reversal system may not work properly.
NOTE: Inspect the torsion bar while the door is raised
and lowered. It is important that there is no noticeable
movement up and down or left and right. If this type of
movement is not corrected, life of this opener will be
greatly reduced.

4
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.
3. Verify equal cable tension on each side of door.
Cable tension should remain equal during the entire
travel of the door. 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.
WARNING
CAUTION WARNING
WARNING
WARNING
CAUTION
WARNING
WARNING
Tools needed
During assembly, installation and adjustment of the
opener, instructions will call for hand tools as illustrated
below.
Pliers Wire Cutters
ClawHammer
Screwdriver
Adjustable End Wrench
1/4", 5/16" & 3/8" Sockets
and Wrench with 6" Extension
Drill Tape Measure
2
1
Stepladder
Pencil
3/16" and 1/8"
Hex Key Wrench
Needle Nose Pliers
5/32", 3/16", 5/16"
and 3/4" Drill Bits
Sectional Door

5
2-Conductor Bell Wire
White & White/Red
Safety Labels
and
Literature
Remote Control
Visor Clip
Mounting Bracket
SECURITY✚®
3-Button Remote Control (1)
(2) Safety Reversing Sensors
(1 Sending Eye and 1 Receiving Eye)
with 2-Conductor White & White/Black
Bell Wire attached
Safety Sensor
Bracket (2)
Motor Unit
LOCKLIGHT
Motion Detecting
Control Console
Collar with Screws
Cable Tension
Monitor with 2-Conductor
Green/White Bell Wires
Power Door Lock
2-Conductor White &
White/Black Bell Wire
with Connector
Remote Light
with Hardware Bag
Carton Inventory
Your garage door opener is packaged in one carton
which contains the motor unit and the parts illustrated
below. Note that accessories will depend on the model
purchased. If anything is missing, carefully check the
packing material.
Hardware Inventory
INSTALLATION HARDWARE
Hex Screw #14-10x1-7/8" (4)
Screw #6x-1-1/4" (2)
Machine Screw #6x1" (2)
Carriage Bolt 1/4"-20x1/2" (2)
Wing Nut 1/4"-20 (2)
Pan Head Screw 1/4"-20x1/2" (2)
Hex Head Screw #8x1" (2)
Self Tapping Screw #10-32 (2)
Drywall Anchor (2)
Drywall Anchor (Screw-In) (2)
Handle
Rope
Insulated Staples (30)
Lock Template (Located Under Access Door)

ASSEMBLY STEP 1
Attach the Collar to the Motor Unit
To avoid installation difficulties, do not run the
garage door opener until instructed to do so.
• Loosen the collar screws.
• Attach collar to either the left or the right side of the
motor unit. Ensure that the collar is seated all the way
on motor shaft until stop is reached (Figure 1).
• Position the collar so that the screws are facing up
(accessible when attached to the torsion bar).
• Tighten both sides of collar screws equally to secure
collar to the motor unit (12-14 ft./lbs. of torque)
(Figure 2).
NOTE: For most installations the screws should be
facing up for easy access.
NOTE: Do not tighten set screws until indicated.
6
Collar Screw
Collar Screw
Set Screw
ASSEMBLY STEP 2
Attach Mounting Bracket to
Motor Unit
• Loosely attach slotted side of mounting bracket to the
same side of the motor unit as the collar, using self-
threading screws provided.
NOTE: Do not tighten until instructed.
NOTE: Illustrations shown are for left side installation.
Socket Wrench
Figure 1
RIGHT WRONG
Figure 2
Screw
#10-32
HARDWARE SHOWN ACTUAL SIZE
To prevent possible SERIOUS INJURY OR DEATH, the collar
MUST be properly tightened. The door may NOT reverse
correctly or limits may be lost due to collar slip.
WARNING
CAUTION WARNING
WARNING

7
INSTALLATION
INSTALLATION STEP 1
Position the Opener
1. Close the garage door completely.
2. Slide the opener with collar over the end of the torsion
bar. Check to make sure bracket is located on a solid
surface such as wood, concrete or door/flag bracket.
Snug collar screws to help assure proper alignment of
operator. Mark the bracket holes. It may be necessary
to cut the torsion bar if it is too long or damaged.
3. Loosen collar screws from torsion bar and remove the
opener. Drill 3/16" pilot holes at the marked locations.
Drill through steel plate if needed.
4. Reinstall the opener by sliding the collar over the
torsion bar until pilot holes align with bracket. Securely
tighten collar screws that attach to the torsion bar to
12-14 ft./lbs. of torque. Securely tighten both set
screws firmly, without damaging the jackshaft.
5. Fasten bracket securely with 14-10x1-7/8" screws.
Tighten all mounting bracket hardware.
NOTE: The motor unit does not have to be flush to wall.
6. Use a staple to secure the antenna wire to prevent
antenna from being entangled in a door roller.
To prevent possible SERIOUS INJURY or DEATH:
• Concrete anchors MUST be used if mounting bracket 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.
• Operator MUST be mounted at a right angle to the torsion
bar to avoid premature wear on the collar.
Motor unit
Staple
Torsion Bar
WARNING
CAUTION WARNING
WARNING
14-10x1-7/8" Hex Screw
HARDWARE SHOWN ACTUAL SIZE
IMPORTANT INSTALLATION INSTRUCTIONS
To reduce the risk of SEVERE INJURY or DEATH:
WARNING
WARNING
WARNING
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 Mount emergency release handle no higher than 6 feet
(1.83 m) above floor.
6. NEVER connect garage door opener to power source until
instructed to do so.
7. NEVER wear watches, rings or loose clothing while
installing or servicing opener. They could be caught in
garage door or opener mechanisms.
8. 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.
9. Place entrapment warning label on wall next to garage
door control.
10. Place manual release/safety reverse test label in plain view
on inside of garage door.
11. 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.

8
Staples
Lock Screw
1/4-20 x 1/2" (2)
HARDWARE SHOWN ACTUAL SIZE
Approx. 3" (7.6 cm)
Lock Template
Roller
Garage
Door Track
TOP
DRILL 5/16"
DRILL 3/4"
DRILL 5/16"
132A2505
TOP
DRILL5/16"
DRILL3/4"
DRILL5/16"
132A2505
Figure 1
INSTALLATION STEP 3
Install Power Door Lock
The lock is used to prevent the garage door from
being manually opened once the door is fully closed.
1. Select a door roller to mount the lock above. Check for
clearance. If possible select a roller on the same side
of the door as the motor unit. The second roller up
from the bottom is ideal in most installations.
2. Ensure rail surface is clean and adhere lock template
with bottom edge just above the highest point on the
roller (Figure 1).
3. Drill holes as marked on the template.
4. Fasten power door lock to the outside of the garage
door track with hardware provided.
5. Run bell wire up wall to motor unit. Use insulated
staples to secure wire in several places.
6. Plug connector into the motor unit (Figure 2).
NOTE: Lock must be mounted within 10' of the
power head.
NOTICE
Overhand
Knot
Emergency
Release Handle
Overhand
Knot
Rope
Motor Unit
Emergency
Release Cable
To prevent possible SERIOUS INJURY or DEATH from a
falling garage door:
• If possible, use emergency release handle to disengage
door 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.
WARNING
CAUTION WARNING
WARNING
INSTALLATION STEP 2
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 loop in
the emergency release cable.
• Adjust rope length so the handle is no higher than 6'
(1.83 m) 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.
Figure 2

9
WHT/GRN
To release wire, push in
tabwith screwdriver tip
Cable Tension
Monitor
7/16" (11mm)
Strip wire 7/16" (11mm)
WHT/GRN
Cable
Tension
Monitor
Cable Tension
Monitor Roller
Cable
2"-6"
(5 cm-
15 cm)
Drum
Torsion Bar
Opener
1/8"-1/4"
(3 mm-6 mm)
With Door Closed
Preferred Orientation
Figure 1
#8Hex Head Screw(2)
Screw#6 (2) Wall Anchor (2)
Staples
HARDWARE SHOWN ACTUAL SIZE
Figure 3
INSTALLATION STEP 4
Attach the Cable Tension Monitor
(Required)
This opener comes standard with the cable tension
monitor. It is supplied as a device to monitor the
cables for ANY slack that may occur and will reverse
the door when excessive slack is detected,
eliminating service calls.
The cable tension monitor must be connected and
properly installed before the garage door opener will
move in the down direction.
NOTE: The cable tension monitor is shipped for left
side installation.
NOTE: It is preferred that the cable tension monitor be
installed on the same side of the door as the opener. If
required, it can be mounted on the opposite side of door.
Remove the snap-ring holding the roller in place and
reassemble it on the opposite side of the cable
tension monitor.
1. Position the cable tension monitor as shown
(Figures 1 and 2). The cable tension monitor should be
located as close to the drum as possible.
NOTE: There must be no obstructions in the installation
area that prevent the cable tension monitor or the cable
itself from closing completely when slack is detected.
2. Make sure cable tension monitor is located over a
wood support member.
NOTE: If the cable tension monitor can not be mounted
into wood with the lag screws provided, it can be
mounted into 1/2" or greater drywall using the wall
anchors (2) and the #8 hex head screws (2) provided in
the hardware bag.
3. Mark and drill 3/16" pilot holes for screws (pilot holes
are not required for anchors).
4. Attach the cable tension monitor to the wall using the
hardware provided. Make sure that the roller is on top
of the cable.
5. Run bell wire to motor unit. Use insulated staples to
secure wire in several places.
6. Connect bell wire to the green quick-connect terminals
(polarity is not important) (Figure 3).
NOTE: Cable must have tension through entire travel.
Make sure there is no slack in cable on opposite side of
garage door during normal operation. If this condition
exists, adjust cables as required.
3/4" Min.
(18mm Min.)
Wall
Drum
Cable
Figure 2

10
INSTALLATION STEP 5
Install the Control Console
Locate control console within sight of the door at a
minimum height of 5 feet (1.5 m) where small children
cannot reach, and away from moving parts of the 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 and the power head is plugged in, 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 terminals on back of control
console by color: white wire to WHT and white/red wire
to the RED (Figure 3).
2. Remove cover by gently prying at slot in top of the
cover with a small flat head screwdriver. 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 control console 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 over tighten.
• Insert top tabs and snap on cover.
NOTE: The push bar may stick if the control console 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 control console to a smoother
surface.
3. (Standard installation only) Run bell wire up wall and
along 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 4).
5. Use tacks or staples to permanently attach entrapment
warning label to wall near control console, and manual
release/safety reverse test label in a prominent
location on inside of garage door.
NOTE: DO NOT connect the power and operate the
opener at this time. The door will travel to the full open
position but will not return to the close position until the
sensor beams are connected and properly aligned. See
Protector System Instructions beginning on page 14.
WHT/RED
WHT
Control Console
Connections
To release wire, push in
tabwith screwdriver tip
7/16" (11 mm)
Strip wire 7/16" (11 mm)
To prevent possible SERIOUS INJURY or DEATH from
electrocution:
• Be sure power is not connected BEFORE installing
control console.
• Connect ONLY to 24 VOLT low voltage wires.
To prevent possible SERIOUS INJURY or DEATH from a closing
garage door:
• Install control console 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 control console
push buttons or remote controls.
• 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.
Figure 4
WARNING
CAUTION
WARNING
WARNING
Drywall Anchors
Insulated
Staples
Screw 6ABx1-1/4"
(standard installation)
Screw 6-32x1"
(pre-wired)
HARDWARE SHOWN ACTUAL SIZE
LOCKLIGHT
To Replace
Insert Top
Tabs First
STANDARD WALL MOUNT
Detector
Switch
Push Bar Cover
ON
OFF
Figure 1
Bell Wire
PRE-WIRED INSTALLATION
LOCKLIGHT
To Replace
Insert Top
Tabs First
Detector
Switch
Push Bar
Cover
ON
OFF
1
RED
2
WHITE
Control
Console
Terminal
Screws
Bell Wire
(BACK VIEW)
Bottom
Mounting
Hole
Top
Mounting
Hole
Figure 3
Figure 2

11
INSTALLATION STEP 6
Install Remote Light
The remote light is designed to plug directly into a
standard 120V outlet.
1. Install the hinge and latch clips. Clips slide in between
the metal plate and the plastic housing on each side of
the light base (Figure 1).
2. Select appropriate location on the ceiling to mount the
light wihin 6' (1.8 m) of an electrical outlet so that the
cord and light are away from moving parts.
3. Install the mounting plate with the screws provided.
Leave 1/8" (3.1 mm) of thread exposed between the
ceiling mount plate and the screw thread.
NOTE: If installing remote light on drywall and a ceiling
joist can not be located, use wall anchors provided.
No pilot hole is required for wall anchors.
4. Determine the length of power cord needed to reach
the nearest outlet. Wind any excess cord around cord
retainer on the top side of the light base.
5. Install the light base by pushing onto the screws and
turning the base clockwise to lock the light in place.
6. Install two Type A19 incandescant or compact
fluorescent bulbs. 100 watt maximum per bulb,
200 watts total.
7. Install the light lens by hooking one end of the lens
over the hinge and pressing up on the other end to
latch into place (Figure 3).
8. Plug in the light to outlet.
NOTE: Light will not operate until the unit is activated.
To prevent possible OVERHEATING of the light socket,
• DO NOT use short neck or specialty light bulbs.
• DO NOT use halogen bulbs. Use ONLY incandescent or
compact fluorescent bulbs
WARNING
CAUTION
WARNING
WARNING
Wall Anchors
Screws
Cord Retainer
Mounting
Plate
Figure 2
Hinge Clip
Latch Clip
Metal
Plate
Plastic
Housing
Light
Base
Light Clip
Screw
Light Clip Screw
Figure 1
Light
Lens
Figure 3
Screw#6x1" (2)
Wall Anchor (2)
Light Clip Screw
#4-20 X 7/16" (2)
HARDWARE SHOWN ACTUAL SIZE
IMPORTANT SAFETY INSTRUCTIONS
To reduce the risk of SEVERE INJURY or DEATH:
WARNING
WARNING
WARNING
1. This portable luminaire has a polarized plug (one blade is
wider than the other) as a feature to reduce the risk of
electric shock.
2. This plug will fit in a polarized outlet ONLY one way.
3. If the plug does not fit fully in the outlet, reverse the plug.
4. If it still does not fit, contact a qualified electrician.
5. NEVER use with an extension cord unless plug can be
fully inserted.
6 DO NOT alter the plug.
7. Light is intended for ceiling mount and indoor
applications ONLY.

12
INSTALLATION STEP 7
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 back of the motor unit (according to local code):
• Remove the opener from the torsion bar, remove cover
screws and set the cover aside.
• Remove the attached green ground terminal.
• Cut black and white wires and strip away 1/2"
(1.3 cm) of insulation, 3" (7.6 cm) before spade
terminals.
• Remove the power cord from unit.
• Install a 90oconduit or flex cable adapter to the 7/8"
hole. Reinstall opener to torsion bar.
• Run wires through conduit, cut to proper length and
strip insulation.
• Attach with wire nuts provided. Wire nuts to be
installed as indicated in Figure 1.
• Properly secure wire under plastic ties so that wire
does not come in contact with moving parts.
• Reinstall the cover.
To avoid installation difficulties, do not run the
opener at this time.
RIGHT WRONG
Ground Tab
Green
Ground
Screw
Ground Wire
Black Wire
From Power Cord
White Wire
From Power Cord
PERMANENT WIRING CONNECTION
Flexible conduit
90˚ Connector
Green Wire White Wire
Black Wire
PERMANENT WIRING CONNECTION
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.
WARNING
CAUTION WARNING
WARNING

13
INSTALLATION STEP 8
Mount the Battery Backup Unit (BBU)
(not provided)
If the optional 475LMC battery backup unit is part of this
installation it should be installed at this time.
• The BBU can be mounted to either the ceiling or a wall
within 3' (.9 m) of the motor unit.
• Position the BBU as desired to a structural support
(ceiling joist or wall stud).
• Attach the BBU to the support using the mounting holes
on either side of the BBU.
• Secure the BBU using the 1-1/2" lag screws (2) provided
with the BBU unit.
• Connect the BBU cord into the connector on the bottom
of the motor unit.
• Follow all instructions included with the 475LMC unit to
test for proper operation and testing of the BBU.
BBU Cord
Connector
475LMC Battery
Backup Unit

14
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 9
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. This is a required safety
device and cannot be disabled.
IMPORTANT INFORMATION ABOUT THE SAFETY
REVERSING SENSOR
When properly connected and aligned, the safety
reversing 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.
WARNING
CAUTION WARNING
WARNING

15
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 safety reversing 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 (Figure 2 and 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

16
Invisible Light Beam
Protection Area
S
enso
r
Senso
r
Safety Reversing Sensor
Bell Wire
Bell Wire
Motor unit
Safety Reversing Sensor
Power Door Lock
Quick-Connect Terminals
WHT/BLK
WHT
WHT/RED
WHT
Sensor
Connections
To Power
Door Lock
To CableTension Monitor
To Control Console
Connect Wire to
Quick-Connect
Terminals
Carriage Bolt
1/4"-20x1/2" Lens
Wing Nut
1/4"-20
Figure 5
Figure 6
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 safety reversing
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 safety reversing 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: 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 the safety
reversing 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 safety reversing 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. (If bulbs are not
installed, 10 clicks can be heard.) See page 11.

17
To prevent damage to vehicles, be sure fully open door
provides adequate clearance.
WARNING
CAUTION
WARNING
WARNING
BLACK
PURPLE
Push and hold
until the door
is at desired UP
position
Figure 2
Figure 3
Push either
button to stop
door at desired
DOWN position
BLACK
PURPLE
Figure 4
or
LOCKLIGHT
Without a properly installed safety reversal system, persons
(particularly small children) could be SERIOUSLY INJURED
or KILLED by a closing garage door.
• NEVER learn forces or limits when door is binding or
sticking. Repair door first.
• Incorrect adjustment of garage door travel limits will
interfere with proper operation of safety reversal system.
• 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.
WARNING
CAUTION WARNING
WARNING
ADJUSTMENT STEP 1
Program the Travel Limits
Travel limits regulate the points at which the door
will stop when moving up or down. Follow the steps
below to set the limits.
To program the travel limits:
Adjust the position of the door by using the black and
purple buttons. Black moves the door UP (open) and
purple moves the door DOWN (close).
1. Setting the UP position: Press and hold the black
button until the yellow indicator light starts flashing
slowly then release.
2. Push and hold the black button until the door reaches
the desired UP (open) position (Figure 2).
NOTE: Check to be sure the door opens high enough for
your vehicle.
3. Push the remote control or door control (Figure 3).
This sets the UP (open) limit and begins closing the
door.
NOTE: Excessive movement of the motor unit will cause
premature wear. See Troubleshooting section.
4. Immediately when the door begins to move down,
press and release either the black or purple button.
This will stop the door.
5. Setting the DOWN position: Push and hold the
purple button until the door reaches the desired
DOWN (closed) position (Figure 4).
6. Once the door is closed, if there appears to have too
much pressure on the door, you may toggle the door
back and forth using the black and purple buttons to
reach the desired closed position.
7. Push the remote control or the door control (Figure 3).
This sets the DOWN (close) limit and should bring the
door to the open position.
• If the opener is not stopping exactly where you
would like it, repeat steps 1 through 8 and program
the limits again.
• When the unit stops in both the desired up (open)
and down (close) positions, proceed to
Adjustment Steps 2, Setting the Force.
Purple
Button
Indicator
Light Black
Button
Figure 1

18
ADJUSTMENT STEP 2
Setting the Force
The force setting button is located on the front panel.
The force setting measures the amount of force
required to open and close the door.
1. Locate the purple button on the unit (Figure 1).
2. Push the purple button twice to enter unit into Force
Adjustment Mode (Figure 2). The LED (Indicator Light)
will flash quickly.
3. Push the remote control or control console (Figure 3).
The door will travel to the DOWN (close) position.
Push the remote control or control console again, the
door will travel to the UP (open) position. Push the
remote control or control console a third time to send
the door to the DOWN (close) position.
The LED (Indicator Light) will stop flashing when the
force has been learned.
The unit has learned the forces required to open and
close your door.
The door must travel through a complete cycle, UP and
DOWN, in order for the force to be set properly. If the
unit cannot open and close your door fully, inspect your
door to insure that it is balanced properly and is not
sticking or binding. See page 4, “Preparing your
garage door.”
Purple
Button
Indicator
Light Black
Button
BLACK
PURPLE
Push Purple button
twice to enter
unit into Force
Adjustment Mode
Figure 3
Figure 2
Figure 1
or
LOCKLIGHT
Without a properly installed safety reversal system, persons
(particularly small children) could be SERIOUSLY INJURED
or KILLED by a closing garage door.
• NEVER learn forces or limits when door is binding or
sticking. Repair door first
• Too much force on garage door will interfere with proper
operation of safety reversal system.
• 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.
WARNING
CAUTION WARNING
WARNING

19
ADJUSTMENT STEP 3
Test the Safety Reversal System
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.
• Operate the door in the down direction. The door must
reverse on striking the obstruction. Upon successful
safety reversal test proceed to Adjustment Step 4.
ADJUST
• If the door stops on the obstruction, it is not traveling
far enough in the down direction. Complete Adjustment
Steps 1 and 2 Programming the Limits and Forces.
• Repeat the test.
• When the door reverses on the 1-1/2" (3.8 cm) board
(or 2x4 laid flat), 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 limits, or force controls.
• 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.
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, 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, do not operate the
door. Call for a trained door systems technician.
1-1/2" (3.8cm) board
(or a 2x4 laid flat)
Without a properly installed safety reversal system, persons
(particularly small children) could be SERIOUSLY INJURED
or KILLED by a closing 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"
(3.8 cm) high object (or 2x4 laid flat) on the floor.
WARNING
CAUTION WARNING
WARNING
Safety Reversing Sensor Safety Reversing Sensor
Without a properly installed safety reversing sensor, persons
(particularly small children) could be SERIOUSLY INJURED
or KILLED by a closing garage door.
WARNING
CAUTION WARNING
WARNING

20
ADJUSTMENT STEP 5
Test Cable Tension Monitor
If your cable tension monitor has been activated the LED
will blink 9 times.
ADJUSTMENT STEP 6
Test Power Door Lock
TEST
• With the door fully closed, the power door lock bolt
should be protruding through the track.
• Operate the door in the open direction. The power
door lock should retract before the door begins
to move.
• Operate the door in the down direction. When the door
reaches the fully closed position, the power door lock
should automatically activate to secure the door.
NOTE: If the power door lock does not function, the lock
can be manually released by sliding the manual release
handle to the open position.
ADJUSTMENT STEP 7
To Open the Door Manually
Disengage door lock before proceeding. The door should
be fully closed if possible. Pull down on the emergency
release handle and lift the door manually. To reconnect
the door to the opener, pull down the emergency release
handle straight down a second time. The door will
reconnect on the next UP or DOWN operation.
Test the emergency release:
• Make sure the garage door is closed.
• Pull the emergency release handle. The garage door
should then be able to be opened manually.
• Return the door to the closed position.
• Pull the emergency handle a second time.
• Reconnect the door to the opener.
Power Door Lock
Manual Release
Lock Bolt
“Locked”
To prevent possible SERIOUS INJURY or DEATH from a
falling garage door:
• If possible, use emergency release handle to disengage
door 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.
WARNING
CAUTION WARNING
WARNING
NOTICE
Emergency
Release Handle