Chamberlain LW3500 User Manual
1/2 hp Belt Drive
Garage Door Opener
FOR RESIDENTIAL USE ONLY
.
.
Write down the following information
for future reference:
Serial Number:
Date of Purchase:
®
LW3500
■ 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
properly aligned.
■ Periodic checks of the garage door opener are required to ensure safe
operation.
■ The model number label is located on the left panel of your garage
door opener.
®
is connected and
CONTENTS
Preparation .............................. 1-4
Assembly ................................. 5-9
Installation ............................ 10-19
Install the Door Control .............20-21
Install the Protector System® ...... 22-25
Power .................................. 26-27
Adjustments .......................... 28-30
Operation.................................. 31
Using Your Garage Door Opener ...... 32
Using the Wall-Mounted
Door Control ..............................32
To Open the Door Manual .............. 33
Care of Your Opener ..................... 33
Having a Problem? ...................... 34
Diagnostic Chart ......................... 35
Programming ......................... 36-37
The Remote Control Battery ............ 38
Accessories ............................... 39
Warranty .................................. 40
Repair Parts .......................... 41-42
www.chamberlain.com
The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
Torsion
Spring
Extension
Spring
OR
Preparation
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 strictaccordance with the instructions and warnings contained in this
manual.
When you see these SafetySymbols and Signal Words on the following pages, they will alert you to the
possibilityof serious injury or death if you do not comply with the warnings that accompanythem. The
hazard may come from something mechanical or from electric shock. Read the warnings carefully.
Mechanical
Electrical
When you see this Signal Word on the following pages, it will alert you to the possibilityof damage to
your garage door and/or the garage door opener if you do not comply with the cautionary statements that
accompanyit. Read them carefully.
Check the Door
To prevent possible SERIOUS INJURY or DEATH:
l 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.
l NEVER tryto loosen, move or adjust garage door, door springs, cables, pulleys,bracketsor their
hardware, ALL of which are under EXTREME tension.
l Disable ALL locks and remove ALL ropes connected to garage door BEFORE installation and
operating garage door opener to avoid entanglement.
To prevent damage to garage door and opener:
l ALWAYS disable locksBEFORE installing and operating the opener.
l ONLY operate garage door opener at 120 V, 60 Hz to avoid malfunction and damage.
Before you begin:
1. Disable locks and remove any ropes connected to the garage door.
2. Liftthe door halfway up. Release the door. If balanced, it should stay
in place, supported entirely by its springs.
3. Raise and lower the door to check for binding or sticking. If your door
binds, sticks, or is out of balance, call a trained door systems
technician.
4. Checkthe seal on the bottom of the door. Any gap between the floor
and the bottom of the door mustnot exceed 1/4 inch (6 mm).
Otherwise,the safetyreversal systemmay not work properly.
5. The opener should be installed above the center of the door. If there
is a torsion spring or center bearing plate in the way of the header
bracket,it may be installed within 4feet(1.2 m) to the leftor right of
the door center. See page11.
1
2
1
3/16
7/16
1/2
7/32
5/16
3/8
7/16
1/2
Preparation
Additional Items You May Need:
Survey your garage area to see if you will need any of the following items:
n (2) 2X4 PIECES OF WOOD
May be used to fasten the header bracketto the structural supports.Also used to position the
garage door opener during installation and for testing the safetyreversing sensors.
n SUPPORT BRACKET AND FASTENING HARDWARE
Mustbe used if you have a finished ceiling in your garage.
n EXTENSION BRACKETS(MODEL 041A5281-1) OR WOOD BLOCKS
Depending upon garage construction, extension bracketsor wood blocksmay be needed to
install the safetyreversing sensor.
n FASTENING HARDWARE
Alternate floor mounting of the safety reversing sensor will require hardware not provided.
n OUTSIDE QUICK RELEASE (MODEL 7702CB)
Required for a garage with NO access door.
n DOOR REINFORCEMENT
Required if you have a lightweightsteel, aluminum, fiberglass or glass panel door.
n RAILEXTENSION KIT
Required if your garage door is more than 7 feet (2.13 m) high.
Tools Needed
2
N
A
B
C
H
K
J
O
I
D
E
F
G
L
M
P
Preparation
Carton Inventory
Your garage door opener is packaged in one carton which contains the motor unit and all parts
illustrated below. Accessoriesvary depending on the garage door opener model purchased. Depending
on your model, other accessories may be included with your garage door opener. Instructionsfor these
accessories will be attached to the accessory and are not included in this manual. Save the carton and
packing material until the installation and adjustmentis complete.The images throughout this manual
are for reference only and your product may look different.
A. Header bracket
B. Pulley
C. Door bracket
D. Curved door arm
E. Straight door arm (Packaged inside front rail section)
F. Trolley
NOTE: Be sure to assemble the trolley before sliding onto rail.
G. Emergency release rope and handle
H. Rail (1 front and 4 center sections)
I. Hanging brackets (2) (Packaged inside the front rail section)
J. Garage door opener (motor unit)
K. Sprocketcover and screws
L. “U” bracket
M. Belt
N. Door control (Multi-Function Door Control)
O. Remote control
P. The ProtectorSystem
Safetyreversing sensors with 2 conductor white and white/blackwire attached: Sending Sensor
(1), Receiving Sensor (1), and Safety Sensor Brackets(2)
NOT SHOWN
White and red/white wire
Owner's manual
Hardware
®
3
Clevis Pin 5/16"x1-1/2"
Ring Fastener (3)
Hex Bolt 5/16"-18x7/8" (4)
Lock Washer
5/16"-18 (5)
Nut
5/16"-18 (6)
Self-Threading Screw
1/4"-14x5/8" (2)
Clevis Pin 5/16"x1"
Clevis Pin 5/16"x1-1/4"
Carriage Bolt
1/4"-20x1/2" (2)
Wing Nut 1/4"-20 (2)
ASSEMBLY INSTALLATION
Screw 6ABx1" (2)
Drywall Anchors (2)
Screw 6-32x1" (2)
DOOR CONTROL
Insulated
Staples
(
Not Shown)
Lag Screw 5/16"-9x1-5/8" (4)
Hex Screw
#8x3/8" (2)
(packed with the
sprocket cover)
Bolt
1/4"-20x1-3/4"
Lock Nut
1/4"-20
Bolt
Nut 3/8"
Lock Washer 3/8"
Master Link
Spring
Trolley Nut
Threaded
Shaft
with
Preparation
Hardware
4
Assembly
To garage
door opener
(TO MOTOR UNIT)
Front Rail
Section
(TO DOOR)
“U” Bracket
Outer Trolley
Inner Trolley
Wear Pads
SLIDE TO STOPS
ON TOP AND
SIDES OF
“U” BRACKET
Rail
Tab
Trolley
Window
Cut-Out
Idler
Pulley
Hole
STEP 1 Assemble the rail and install the trolley
To prevent INJURY from pinching, keep hands and fingers away from the joints while assembling the
rail.
To avoid installationdifficulties,do not run the garage door opener untilinstructed to do so.
The front rail has a cut out “window” at the door end. The rail tab MUST be on top of the rail when
assembled.
1. Remove the straight door arm and hanging bracket packaged inside the front rail and set aside
for Installation Step 5 and 9. NOTE: To prevent INJURY while unpacking the rail carefully remove
the straight door arm stored within the rail section.
2. Align the rail sections on a flat surface as shown and slide the tapered ends into the larger ones.
Tabs along the side will lock into place.
3. Place the motor unit on packing material to protect the cover, and rest the back end of the rail on
top. For convenience, put a support under the front end of the rail.
4. As a temporary stop, insert a screwdriver into the hole 10" (25 cm) from the front end of the rail,
as shown.
5. Checkto be sure there are 4 plasticwear pads inside the inner trolley. If they became loose
during shipping, check all packing material. Snap them back into position as shown.
6. Slide the trolley assemblyalong the rail from the back end to the screwdriver.
7. Slide the rail onto the “U” bracket, until it reaches all the stops on the top and sides of the “U”
bracket.
5
Assembly
HARDWARE
Bolt 1/4"-20x1-3/4"
Lock Nut 1/4"-20
“U” Bracket
Cover
Protection
Bolt Hole
Bolt
1/4"-20x1-3/4"
Lock Nut 1/4"-20
Bolts (Mounted in the
garage door opener)
STEP 2 Fasten the rail to the motor unit
To avoid SERIOUS damage to garage door opener, use ONLY those bolts/fasteners mounted in the
top of the opener.
1. Insert a 1/4"-20x1-3/4" bolt into the cover protection bolt hole on the back end of the rail as
shown. Tighten securely with a 1/4"-20 lock nut. DO NOT overtighten.
2. Remove the bolts from the top of the motor unit.
3. Use the carton to support the front end of the rail.
4. Place the “U” bracket, flat side down onto the motor unit and align the bracketholes with the bolt
holes.
5. Fasten the “U” bracketwith the previously removed bolts;DO NOT use any power tools.The use
of power tools may permanently damage the garage door opener.
6
Assembly
HARDWARE
Bolt
Nut 3/8"
Lock Washer 3/8"
Rail
Trolley Connector
Bolt
Lock Washer 3/8"
Nut
3/8"
Rail Tab
CORRECT
INCORRECT
Rail Tab
Idler Pulley
Grease Inside Pulley
STEP 3 Install the idler pulley
1. Lay the belt beside the rail, as shown. Grasp the end with the hooked trolley connector and pass
approximately 12" (30 cm) of belt through the window. Keep the ribbed side toward the rail, and
allow it to hang until Assembly Step 4.
2. Remove the tape from the idler pulley. The inside center should be pre-greased. Ifdry, regrease
to ensure proper operation.
3. Place the idler pulley into the window as shown.
4. Insert the idler bolt from the top through the rail and pulley. Tighten with a 3/8" lock washer and
nut underneath the rail until the lock washer is compressed.
5. Rotate the pulley to be sure it spins freely.
6. Locate the rail tab. The rail tab is between the idler bolt and the trolley in the front rail section. Use
a flathead screwdriver and liftthe rail tab until the tab is vertical (90º).
7
Assembly
HARDWARE
Master
Link
Threaded Shaft with Spring Trolley Nut
Figure 3
Front Rail
Section
(TO DOOR)
Idler Pulley
Threaded Shaft
Master Link
Figure 2
Sprocket
Trolley Connector
Retaining Slot
Figure 1
STEP 4 Install the belt
1. Pull the belt around the idler pulley and toward the trolley. The ribbed side must contactthe
pulley.
2. Hookthe trolley connector into the retaining slot on the trolley as shown (Figure 1).
3. With the trolley against the screwdriver, dispense the remainder of the belt along the rail
lengthtoward the motor unit and around the sprocket(Figure 2). The sprocket teeth mustengage
the belt.
4. Checkto make sure the belt is not twisted.Connect the trolley threaded shaft with the master link
(Figure 3).
l Push pins of master link bar through holes in end of belt and trolley threaded shaft.
l Push master link cap over pins and past pin notches.
l Slide the closed end of the clip-on spring over one of the pins. Push the open end of the
clip-on spring onto the other pin.
5. Remove the spring trolley nut from the threaded shaft.
6. Insert the trolley threaded shaft through the hole in the trolley.
8
Assembly
Nut Ring
BEFORE
1"
(2.5
cm)
Nut Ring
AFTER
1-1/4"
(3.18 cm)
Spring
Trolley Nut
Nut Ring Slot
Hex Screw #8x3/8"
(Packed
with the
sprocket cover)
HARDWARE
Hex Screw #8x3/8"
Sprocket Cover
STEP 5 Tighten the belt
1. By hand, thread the spring trolley nut on the threaded shaft until it is finger tight against the
trolley.Do not use any tools.Remove the screwdriver.
2. Insert a flathead screwdriver tip into one of the nut ring slots and brace it firmlyagainst the trolley.
3. Tighten the spring trolley nut with an adjustable wrench or a 7/16" open end wrench about a
quarter turn until the spring releases and snaps the nut ring against the trolley. This sets the
spring to optimum belt tension.
STEP 6 Install the sprocket cover
To avoid possible SERIOUS INJURY to finger from moving garage door opener:
l ALWAYS keep hand clear of sprocketwhile operating opener.
l Securely attach sprocketcover BEFORE operating.
1. Position the sprocket cover over the sprocketas shown and fasten to the mounting plate with
8x3/8" hex screws provided.
You have now finished assembling your garage door opener.Please read the following warnings
beforeproceeding to the installation section.
9
Installation
IMPORTANT INSTALLATION INSTRUCTIONS
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 locksand 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 the emergency release within reach, but at least6 feet (1.83 m) above the floor and
avoiding contact with vehicles to avoid accidental release.
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:
l within sight of the garage door.
l out of reach of children at minimum height of 5 feet (1.5 m).
l away from ALL moving partsof the door.
10. Place entrapment warning label on wall next to garage door control.
11. Place manual release/safetyreverse testlabel in plain view on inside of garage door.
12. Upon completion of installation,testsafety 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.
13. To avoid SERIOUS PERSONAL INJURY or DEATH from electrocution, disconnect ALL electric
and battery power BEFORE performing ANY service or maintenance.
10
Installation
Header Wall
Vertical Centerline of Garage Door
2x4
Structural
Supports
Level
(Optional)
Unfinished
Ceiling
2x4
OPTIONAL CEILING MOUNT
FOR HEADER BRACKET
Sectional door with curved track
Header Wall
Track
2" (5 cm)
Highest
Point of
Travel
Door
One-piece door with horizontal track
Header Wall
Track
2" (5 cm)
Highest
Point of
Travel
Door
One-piece door without track:
jamb
hardware
Header Wall
8" (20
cm)
Highest
Point of
Travel
Door
Jamb
Hardware
One-piece door without track:
pivot hardware
Header Wall
8" (20
cm)
Highest
Point of
Travel
Door
Pivot
STEP 1 Determine the header bracket location
To prevent possible SERIOUS INJURY or DEATH:
l 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.
l Concrete anchors MUST be used if mounting header bracketor 2x4 into masonry.
l NEVER tryto loosen, move or adjust garage door, springs, cables,pulleys, brackets, or their
hardware, ALL of which are under EXTREME tension.
l ALWAYS call a trained door systems technician if garage door binds, sticks, or is out of balance.
An unbalanced garage door might NOT reverse when required.
Installation procedures vary according to garage door types.Follow the instructions which apply to your
door.
1. Close the door and mark the inside vertical centerline of the garage door.
2. Extend the line onto the header wall above the door.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 12) when clearance is minimal. (Itmay be
mounted on the wall upside down if necessary,to gain approximately1/2" (1 cm).Ifyou 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 supportsas shown here and on page 12.
3. Open your door to the highest point of travel as shown. Draw an intersecting horizontal line on
the header wall 2" (5 cm) above the high point :
l 2" (5 cm) above the high point for sectional door and one-piece door with track.
l 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 12 for
ceiling installation.
11
Installation
HARDWARE
Lag Screw 5/16"-9x1-5/8"
UP
Wall Mount
Optional Mounting
Holes
Vertical
Centerline of
Garage Door
(Header Wall)
Header
Bracket
2x4 Structural
Support
Door Spring
(Garage Door)
Highest Point
of Garage
Door Travel
Horizontal
Line
Lag Screw
5/16"-9x1-5/8"
UP
(Header Wall)
Ceiling Mounting
Holes
(Finished
Ceiling)
Vertical
Centerline of
Garage Door
Header
Bracket
6" (15 cm)
Maximum
Door Spring
(Garage Door)
Lag Screw
5/16"-9x1-5/8"
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).
OPTION A WALL INSTALLATION
1. Center the bracket on the vertical centerline with the bottomedge of the bracket on the horizontal
line as shown (with the arrow pointing toward the ceiling).
2. Markthe vertical set of bracketholes. Drill 3/16" pilot holes and fasten the bracket securely to a
structural support with the hardware provided.
OPTION B CEILING INSTALLATION
1. Extend the vertical centerline onto the ceiling as shown.
2. Center the bracket on the vertical mark, no more than 6" (15cm) from the wall. Make sure the
arrow is pointing away from the wall. The bracketcan be mounted flush against the ceiling when
clearance is minimal.
3. Markthe side holes. Drill 3/16" pilot holes and fasten bracketsecurely to a structural support with
the hardware provided.
12
Installation
HARDWARE
Clevis Pin 5/16"x1-1/2"
Ring Fastener
Clevis Pin
5/16"x1-1/2"
Ring Fastener
One-piece
door
without
tracks
All other
door types
Connected Disconnected
STEP 3 Attach the rail to the header bracket
1. 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 will need help. Have someone hold the opener
securely on a temporary support to allow the rail to clear the spring.
2. Position the rail bracket againstthe header bracket.
3. Align the bracket holes and join with a clevis pin as shown.
4. Insert a ring fastener to secure.
STEP 4 Position the garage door opener
To prevent damage to garage door, rest garage door opener rail on 2x4 placed on top section of door.
1. Remove the packing material and lift the garage door opener onto a ladder.
2. Fullyopen the door and place a 2x4 (laid flat) under the rail. For one-piece doors without tracks,
lay the 2x4 on it's side.
NOTE: A 2x4 is ideal for setting the distancebetween the rail and the door. If the ladder is not tall
enough you will need help at this point. If the door hits the trolley when it is raised, pull the trolley release
arm down to disconnectthe inner and outer trolley. Slide the outer trolley toward the garage door
opener. The trolley can remain disconnected until instructed.
13
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