Chamberlain 4620, 4620-2 User Manual
The Chamberlain Group, Inc.
A DUCHOSSOIS ENTERPRISE
845 Larch Avenue
Elmhurst, Illlinois 60126-1196
www.chamberlaingroup.com
Garage Door Opener
Models 4620 & 4620-2
1/2 HP
For Residential Use Only
Complies with UL 325
regulations effective
January 1, 1993
®
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 back of your opener.
®
Safety alert symbol review............................................2
Complete the safety reversing sensor installation.....22
Install the lights and lens ..........................................23
Attach the manual release rope and handle...............23
Fasten the door bracket (sectional door)...................24
Fasten the door bracket (one-piece door)..................25
Connect door arm to trolley (sectional door)............26
Connect door arm to trolley (one-piece door)...........27
Adjustment section - pages 28 – 30
Travel limit adjustments............................................28
Force adjustments .....................................................29
Test the Protector System
®
........................................30
Test the safety reverse system ..................................30
Operation safety instructions ......................................31
Care of your opener ....................................................31
Maintenance schedule.................................................31
Operation of your opener............................................32
Receiver & remote control programming...................33
Having a problem?......................................................34
Repair parts, rail assembly..........................................36
Repair parts, installation .............................................36
Repair parts, power unit..............................................37
Accessories .................................................................38
Index ...........................................................................39
How to order repair parts............................................40
Warranty......................................................................40
When you see these Safety Symbols on the following pages, they will alert you to the possibility of
When you see this Safety Symbol 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 corresponding instructions. Read the
instructions carefully.
This garage door opener is designed and tested to offer safe service provided it is installed, operated, maintained
and tested in strict accordance with the safety instructions contained in this manual.
Electrical
WARNING
WARNING
WARNING
WARNING
CAUTION
WARNING
Contents
Safety information, precautions, tools..........................3
Testing your garage door for binding & balance..........3
Carton inventory ...........................................................4
Hardware inventory.......................................................5
Illustration of sectional door installation .....................6
Illustration of one-piece door installation.....................7
Assembly section - pages 8 – 11
Assemble the rail ........................................................8
Fasten rail to power unit............................................10
Install the trolley.......................................................10
Attach the rail brackets .............................................11
Installation section - pages 12 – 27
Installation safety instructions ..................................11
Determine the header bracket location
Sectional door .........................................................12
One-piece door........................................................13
Install the header bracket..........................................14
Attach the rail to the header bracket.........................15
The Protector System
safety reversing sensor information.......................16
Install the safety reversing sensor.............................17
Position the opener....................................................19
Hang the opener........................................................20
Install the door control and connect all wires...........21
Electrical requirements .............................................22
®
Start by reviewing these important safety alert symbols:
or death if you do not comply with the corresponding instructions. The hazard may come from something
mechanical or from electric shock. Read the instructions carefully.
serious injury
Mechanical
2
3
Sectional Door
One-Piece Door
During assembly , installation and adjustment of the opener, instructions will call for tools shown below.
An unbalanced garage door might not reverse when
required and someone under the door could be seriously
injured or killed.
If your garage door binds, sticks or is out of balance, call
for professional garage door service.
Garage doors, door
springs, cables, pulleys, brackets, and their hardware are
under extreme tension and can cause serious injury or
death.
Do not try to loosen, move or adjust them
yourself!
Ropes left on a garage door could cause someone to
become entangled and killed.
Remove all ropes
connected to the door before installing and operating the
opener.
To avoid damage to the garage door and opener, disable
locks before installing and operating the opener. Use a
wood screw or nail to hold locks in the "open" (unlocked)
position.
Operation at other than 120V 60 Hz will cause opener
malfunction and damage.
Identify the type and height of your door, any special
conditions that exist, and any additional materials that
may be required. Refer to pages 6 and 7.
Test Your Door for Balance
Before you begin, complete the following test to make
sure your door is balanced, and is not sticking or
binding:
• Lift the door about halfway as shown. Release the door.
It should stay in place, supported entirely by its springs.
• Raise and lower the door to see if there is any binding
or sticking.
Safety Information, Precautions, Tools
WARNING
CAUTIONCAUTION
Pencil
2
1
Tape Measure
3/16", 5/16" and
5/32" Drill Bits
Wire Cutters
Screwdriver
Pliers
Hack Saw
Claw Hammer
1/2" x 7/16" Box Wrench
Stepladder
Carpenter's
Level
Drill
1/2" & 7/16" Sockets
and Wrench
4
Carton Inventory
Your garage door opener is packaged in one carton which contains the power unit and all parts illustrated below. If
anything is missing, carefully check the packing material. Parts may be "stuck" in the foam. KEEP THE FOAM
INTACT (see page 10). Hardware for assembly and installation is shown on page 5.
Lighted Door
Control Button
Light Lens
2-Conductor Bell Wire
White & White/Red
Models 4620 (1), 4620-2 (2)
SECURITY✚
Single-Function
Remote Control Transmitter
Remote Control
Transmitter Visor Clip
Sprocket
Coupling
Rail
Assembly
Trolley
Hanging Brackets
Header/Rail
Brackets
CEILING MOUNT ONLY
UP
Header Bracket
(2) Safety Reversing Sensors
(1 Sending Eye and 1 Receiving Eye)
2-Conductor White & White/Black Bell Wire
with attached
Rail Support
Braces (4)
Door Bracket
Safety Reversing Sensor
Mounting Bracket (2)
Straight Door
Arm Section
Curved Door
Arm Section
Safety Labels
and
Literature
Hardware
5
Separate all hardware from the packages in the rail carton and the opener carton and group as shown below, for
the assembly and installation procedures.
Assembly Hardware
1/4-20x1-3/4" (8)
Ring
Fastener (3)
Lag Screw
5/16"-9x1-5/8" (2)
Bolt
Wing Nut (2)
1/4" - 20 x 5/8"
Hex Screw (4)
1/4"-20 x 7/16 (12)
Installation Hardware
Carriage Bolt
1/4"-20x1/2" (2)
Hex Screw
5/16"-18x7/8" (4)
Lock Nut
Sprocket Coupling Sleeve
Lock Washer 5/16" (6)
NOTICE
Handle
Lag Screw
5/16"-18x1-7/8" (2)
Carriage Bolt
5/16"-18x2-1/2" (2)
Clevis Pin
5/16"x2-3/4" (1)
Dry Wall Anchors (2)
Clevis Pin
5/16"x1" (1)
Nut 5/16"-18 (6)
Insulated
Staples (30)
5/16"x1-1/4" (1)
Rope
Clevis Pin
6
SECTIONAL Door Installation
Before you begin, survey your garage area to see whether any of the conditions below apply to your installation.
You may find it helpful to refer back to this page as you proceed with the installation of your opener.
Based on your particular requirements, there are several
installation steps which might call for materials and/or
hardware not included in the carton.
• Step 1, page 12 – Look at the wall or ceiling above the
garage door. The header bracket must be securely
fastened to structural supports.
• Safety reversing sensor, page 16 – Depending upon
garage construction, extension brackets or wood blocks
may be needed to be fasten sensors to mounting locations.
• Step 4, page 17 – Floor mounting of the safety reversing
sensor will require hardware not provided.
• Step 6, page 20 – Do you have a finished ceiling in your
garage? If so, a support bracket and additional fastening
hardware may be required.
• Step 12, page 24 – Do you have a steel, aluminum,
fiberglass or glass panel door? If so, horizontal and
vertical reinforcement is required.
• Look at the garage door where it meets the floor. It must
close on the floor all the way across. Otherwise, the
safety reverse system may not work properly. See
page 30. Floor or door should be repaired.
• The opener can be installed within 4 feet of the left or
right of the door center if there is a torsion spring or
center bearing plate in the way of the header bracket or
door bracket area. If your door has extension springs,
the opener must be installed in the center of the door.
See pages 12 and 24.
• Do you have an access door in addition to the garage
door? If not, Model 7702CB Outside Quick Release is
required. See page 38.
• If your door is more than 7 feet high, see the rail
extension kits listed on page 38.
FINISHED CEILING
Support bracket &
fastening hardware
Horizontal and vertical reinforcement
is needed for lightweight garage doors
(fiberglass, steel, aluminum, door with glass panels, etc.).
See page 24 for details.
Header Wall
— — — — — — — —
Extension Spring
OR
Torsion Spring
is required.
See page 20.
Door Center
Floor must be level
across width of door
Safety Reversing Sensor
Access Door
Safety
Reversing
Sensor
Closed Position
Bracket
Garage
Door
Spring
Door
Arm
Door
Curved
Door
Arm
Rail Assembly
Trolley
Manual
Release
Rope & Handle
Header
Wall
Garage
Door
Header
Bracket Rail
Straight
Bracket
7
Before you begin, survey your garage area to see whether any of the conditions below apply to your installation.
You may find it helpful to refer back to this page as you proceed with the installation of your opener.
Based on your particular requirements, there are several
installation steps which might call for materials and/or
hardware not included in the carton.
• Step 1, page 13 – Look at the wall or ceiling above the
garage door. The header bracket must be securely
fastened to structural supports.
• Step 6, page 20 – Do you have a finished ceiling in your
garage? If so, a support bracket and additional fastening
hardware (not supplied) may be required.
• Safety reversing sensor, page 16 – Depending on garage
construction, extension brackets or wood blocks may be
needed to be fasten sensors to mounting locations.
• Step 14, page 17 – Floor mounting of the safety
reversing sensor will require hardware that is not provided.
• Step 12, page 25 – Generally, a one-piece door does not
require reinforcement. If your door is lightweight, you
can refer to the information relating to sectional doors
on page 24.
• Step 12, page 25 – Depending on your door's
construction, you might need additional mounting
hardware for the door bracket.
• Do you have an access door in addition to the garage
door? If not, Model 7702CB Outside Quick Release is
required. See page 38.
• The gap between the bottom of the garage door and
the floor cannot exceed 1/4". Otherwise, the safety
reverse system may not work properly. See page 30.
The floor or the door should be repaired.
ONE-PIECE Door Installation
One-Piece Door without Track
FINISHED CEILING
Support bracket
& fastening
hardware is required.
See page 20.
Header
Wall
Access Door
Safety Reversing Sensor
Gap between floor and bottom of
Safety Reversing Sensor
door must not exceed 1/4".
Rail
Bracket
Header
Bracket
Door
Bracket
Header
Wall
Closed Position
Trolley
Garage
Door
Straight
Door
Arm
Curved
Door
Arm
Rail Assembly
Manual
Release
Rope & Handle
One-Piece Door With Track
Access
Door
Safety
Safety
Reversing Sensor
Floor must be level
across width of door
Closed Position
Header
Wall
Garage
Door
Rail
Bracket
Header
Bracket
Door
Bracket
Curved
Door Arm
Straight
Door
Arm
Reversing
Sensor
Trolley
Rail Assembly
Manual Release
Rope & Handle
8
ASSEMBLY STEP 1
Assemble the Rail
Assembly Section: Pages 8 - 11
1. Turn the opened rail carton upside down, emptying its
contents onto a level work surface.
2. Unfold the rails, taking care to avoid kinking the screw
rod joints.
3. Rotate the rail sections so that the flat side is down and
the screw side is up for all three lengths. Keep it clean
and free of debris while you are working.
CAUTION: During assembly, avoid pulling the rail
section housing the trolley rack away from the screw
rod. The rack is factory set about 9" from the end of the
screw rod to the center of the rack.
If the plastic liner slides part way out during assembly,
simply push it back in.
To avoid installation difficulties, do not run the garage
door opener until instructed to do so.
Rail
Support
Braces
Rail Assembly
Carton
Straight
Door Arm
Extend
End Rails
Outward
Center
Trolley Rack
Rail Assembly
Hardware Bag
Remove
Cardboard Packing
Rail
Chassis Assembly
Hardware Bag
Remove
Cardboard Packing
Extend
End Rails
Outward
Rotate
Trolley Rack
Sprocket End Rail
Rail
Sprocket
Center Rail
Door End Rail
Center Rail
Slide End
Rails Towards
Center Rail
Slide End
Rails Towards
Center Rail
Rail
Support
Brace
Lock
Nuts
Center
Rail
Rail Pin
Alignment
Hole
Rail
Support
Brace
Rail Pin
Rail Pin
Alignment
Hole
Alignment
Hole
1/4x20x1-3/4"
Bolts
1/4x20x1-3/4"
Bolts
Lock
Nuts
End
Rail
Door End
Sprocket End
1/4" - 20
Lock Nut
1/4"-20
Lock Nut
1/4" - 20 x 5/8"
Hex Screw
Hex Screw
5/16"-18 x 7/8"
Nut 5/16"-18 Lock Washer 5/16"
Bolt
1/4-20x1-3/4" (8)
Hardware Shown Actual Size
ASSEMBLY STEP 1 (Continued)
Assemble the Rail
4. Beginning with the sprocket end, straighten the two
rail sections so that the screw rod is in a straight line at
the joint. (Avoid handling the joints, which may have
sharp edges.)
5. Carefully slide the pins at the top edge of the rail into
the openings on the adjacent rail.
It is essential that
the rail assembly be on a level surface to achieve
proper alignment and to avoid damage to the pins.
6. Insert two 1/4"-20x1-3/4" bolts through the center
holes of a brace, and place its open length against the
rail at this joint, aligning the holes as shown. Position
another brace on the opposite side of the rail over the
bolts, add 1/4"-20 lock nuts, and hand tighten. Insert
two additional bolts and hand tighten.
7. Keeping the rail straight and on a level surface, grasp
the screw rods on each side of the remaining joint and
pivot into a straight line. Repeat steps 5 and 6.
8. With a 7/16 wrench, tighten bolts til snug, working
from the center holes of the braces to those further
from the joints. Do not overtighten.
9
10
ASSEMBLY STEP 2
Fasten the Rail To the Power Unit
and Install the Trolley
/7/94
Rail
Sprocket
Rail
Assembly
Trolley
Coupling
Rail/Power Unit
Bracket
Lock Nuts
1/4"-20
Power Unit
Sprocket
Power
Unit
Foam Packaging
Hex Screws
1/4"-20x5/8"
Hardware Shown Actual Size
As illustrated above, slide the trolley onto and along the
bottom of the rail until it snaps firmly in place. Be certain
to install it facing correctly: the trolley release arm must
be horizontal (lock position), with its arrow pointed
away from the power unit.
• Working on a level surface, align the rail assembly with
the power unit, as shown.
• Slip the coupling over the rail sprocket.
• Slide the rail through the power unit bracket until the
coupling fits securely over the power unit sprocket.
• Align the two screw holes in the rail with those in the
power unit bracket. Insert two 1/4"-20x5/8" hex screws
and lock nuts. Tighten securely with a 7/16" socket
wrench.
NOTE: To aid in assembly and installation, replace
the foam packing around the power unit. Remove it
after Installation Step 5.
1/4" - 20 x 5/8"
Hex Screw
1/4" - 20
Lock Nut
ASSEMBLY STEP 3
Attach the Rail Brackets
11
IMPORTANT INSTALLATION INSTRUCTIONS
To reduce the risk of severe injury or death to persons:
1. READ AND FOLLOW ALL INSTALLATION INSTRUCTIONS
2. Install only on a properly balanced and lubricated garage door. An improperly balanced door may not
reverse and could result in severe injury or death. Repairs to cables, spring assemblies and other hardware
must be made by a professional service person before installing opener.
3. Disable all locks and remove all ropes connected to the garage door before installing the opener. Ropes
connected to a garage door can cause entanglement and death.
4. If possible, install door opener 7 feet or more above floor with the manual release handle mounted 6 feet
above the floor.
5. Do not connect the opener to power source until instructed to do so.
6. Locate the Door Control within sight of the door at a minimum height of 5 feet where small children
cannot reach and away from all moving parts of the door.
7. Install the User Safety Instruction Label on the wall adjacent to the control button and the Maintenance
Instruction Label in a prominent location on the inside of the garage door.
8. Upon completion of the installation, the door must reverse when it comes in contact with a one-inch high
object or a 2x4 laid flat on the floor.
9. Do not wear watches, rings or loose clothing while installing or servicing an opener. Jewelry or loose
clothing can be caught in the mechanism of the garage door or the opener.
• Align rail brackets to end of rail assembly, as shown.
• Insert two 1/4"-20 x 5/8" hex screws and lock nuts.
Tighten securely with a 7/16" socket.
You have now finished assembling your garage door opener. Please read the following warnings
before proceeding to the installation section:
Hardware Shown Actual Size
1/4" - 20 x 5/8"
Hex Screw
1/4" - 20
Lock Nut
1/4"-20x5/8
Hex
Screws
Rail
Brackets
Rail
1/4"-20
Lock Nuts
WARNING
WARNING
12
SECTIONAL Door or
ONE PIECE Door with Track
• Close the door and mark the inside
vertical centerline of the garage door.
• Extend the line onto the header wall
above the door.
Remember, you can fasten the header
bracket within 4 feet of the left or right
of the door center only if a torsion
spring or center bearing plate is in the
way; or you can attach it to the ceiling
(refer to page 14) when clearance is
minimal. (It may be mounted on the
wall upside down if necessary, to gain
approximately 1/2".)
If you need to install the header bracket on
a 2x4 (on wall or ceiling), use lag screws
(not supplied) to securely fasten the 2x4 to
structural supports as shown here and on
page 13.
• Open your door to the highest point of
travel as shown. Draw an intersecting
horizontal line on the header wall 3"
above the high point. This height will
provide travel clearance for the top edge
of the door.
Proceed to Step 2, page 14.
Installation Section: Pages 12 – 27
Sectional door
with curved track
One-piece door
with horizontal track
Installation Step 1
Determine Header Bracket Location
Installation procedures vary according to garage
door types. Follow the instructions which apply to
your door.
If the header bracket is not rigidly fastened to a
structural support on the header wall or ceiling, the
safety reverse system may not work properly (see
page 30).
The door might not reverse when required, and
could cause serious injury or death.
The garage door springs, cables, pulleys, brackets and
their hardware are under extreme tension.
Do not attempt
to loosen, move or adjust them yourself. Serious
personal injury or death could result.
Call for
professional garage door service.
Finished
Ceiling
2x4
Header
Wall
Ceiling
Vertical
Guideline
Vertical
Guideline
Structural
Supports
WARNING
Header
Wall
3"
Highest Point
of Travel
Door
Track
Header
Wall
3"
Highest Point
of Travel
Door
Track
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