Chamberlain CSO 1-2HP User Manual
MODEL CSO – 1/2HP
COMMERCIAL STRENGTH OPERATOR
For Residential and Light Duty Commercial Use
Install on Sectional Doors Only
OWNER'S MANUAL
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®
■ 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 end panel of your opener as
shown.
The Chamberlain Group, Inc.
A DUCHOSSOIS ENTERPRISE
845 Larch Avenue
Elmhurst, Illlinois 60126-1196
Complies with UL 325
Regulations effective
January 1, 1993.
®
Start by reviewing these important safety alert symbols
2
When you see these safety symbols on the following pages, they will alert you to the possibility of
serious injuries 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.
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.
Mechanical Electrical
Contents Page
A review of safety alert symbols..................................2
You'll need tools...........................................................3
Safety information........................................................3
Testing your garage door for sticking,
binding and balance...................................................3
Illustration of sectional door installation ......................4
Carton inventory...........................................................5
Hardware inventory......................................................6
Assembly section – pages 7 - 10
Assemble rail .............................................................7
Attach chain pulley bracket........................................7
Install trolley...............................................................8
Fasten rail to power head..........................................8
Install chain................................................................9
Attach rail support bracket.........................................9
Tighten the chain.....................................................10
Installation section – pages 10 - 23
Installation safety instructions..................................10
Determine header bracket location.........................11
Install the header bracket........................................12
Attach the rail to header bracket .............................13
Position the opener..................................................14
Hang the opener......................................................15
Install the door control .............................................16
Install the light...........................................................17
Contents Page
Attach manual release rope and handle..................17
Electrical requirements.............................................18
The Protector System®............................................19
Install the safety reversing sensor.....................20, 21
Fasten door bracket and plate.................................22
Connect door arm to trolley......................................23
Adjustment section – pages 24 - 26
Travel limit adjustments ...........................................24
Force adjustments....................................................25
Test the Protector System®....................................26
Test the safety reverse system ...............................26
Operation safety instructions .....................................27
Care of your opener...................................................27
Maintenance schedule...............................................27
Operation of your opener...........................................28
Receiver and remote control programming...............29
Having a problem?...............................................30, 31
Repair parts, rail assembly ........................................32
Repair parts, installation.............................................32
Repair parts, opener assembly..................................33
Accessories................................................................34
Index...........................................................................35
How to order repair parts ...........................................36
Warranty.....................................................................36
WARNING
WARNING
CAUTIONCAUTION
3
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.
This product is for use on sectional garage
doors only.
Serious personal injury could
result from the use of this product on
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 by referring to the list on page 4.
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
You'll Need Tools
During assembly , installation and adjustment of the opener, instructions will call for hand tools shown below.
Carpenter's
Level
Drill
Stepladder
1/2" and 7/16" Sockets
and Wrench
WARNING
Pencil
2
1
Tape Measure
3/16", 5/16" and
5/32" Drill Bits
Wire Cutters
Pliers
Screwdriver
Hack Saw
Claw Hammer
Adjustable End Wrench
CAUTIONCAUTION
4
Safety Reversing Sensor
Horizontal and vertical reinforcement
is needed for lightweight garage doors
(fiberglass, steel, aluminum, door with glass panels, etc.).
See page 22 for details.
Support bracket &
fastening hardware
is required.
See page 15.
— — — — — — — —
Door Center
Header Wall
Safety
Reversing
Sensor
Floor must be level
across width of door
FINISHED CEILING
Extension Spring
Torsion Spring
Access Door
OR
Slack in chain tension
is normal when
garage door is closed.
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 11 - Look at the wall or ceiling above
the garage door. The header bracket
must
be
securely fastened to structural supports.
• Step 5, page 15 - Do you have a finished ceiling in
your garage? If so, a support bracket and
additional fastening hardware may be required.
• Safety reversing sensor, page 19 - Depending
upon garage construction, wood blocks may need
to be fastened to mounting locations before
sensors are installed.
• Step 10, page 20 - Alternate floor mounting of the
safety reversing sensor will require hardware not
provided.
• Step 11, page 22 - 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 26. Floor or door should be
repaired.
Chain Pulley
Bracket
Header
Bracket
Trolley
Straight
Door
Arm
Manual
Release
Rope & Handle
Door Bracket
Garage
Door
Curved
Door
Arm
Garage
Door
Spring
Header
Wall
Chain
Closed Position
Rail
• The opener can be installed within 2 feet to 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 11 and 22.
Do you have an access door in addition to the garage
door? If not, Model 7702CB Outside Quick Release is
required. See page 34.
Before you begin, survey your garage area. Do any of the following conditions apply to you?
You may find it helpful to refer back to this page as you proceed with the installation of your opener.
5
Straight
Door Arm
Door Bracket
Safety Labels
and
Literature
"C" Wrap (2)
Safety Reversing Sensor
Mounting Bracket
With Slot (2)
Door Bracket Plate
Curved Door Arm
Safety Reversing Sensor
Mounting Bracket
With Square Holes (2)
Door Control Button
Rail Support
Bracket
Header Bracket with
Clevis Pin and Fastener
UP
CEILING MOUNT ONLY
2 -Conductor Bell Wire
White & White/Red
Single-Function
Remote Control Transmitter
(2) Safety Reversing Sensors
(1 Sending Eye and 1 Receiving Eye)
with
2-Conductor White & White/Black Bell Wire
attached
Trolley
Chain
Pulley Bracket
TO GARAGE DOOR
TO GARAGE DOOR
TO GARAGE DOOR
TO GARAGE DOOR
Remote Control
Transmitter Visor Clip
Chain
Rail - Center Section
(Interchangeable - 2)
Rail - Front Section
(To Door)
Rail - Back Section
(To Power Head)
Carton Inventory
Your garage door opener is packaged in two cartons which contain all parts illustrated below. If anything is
missing, carefully check the packing material. Parts may be "stuck" in the foam. Hardware for assembly and
installation is listed below.
Lock Washer
5/16" (4)
Nut 5/16"-18 (6)
Clevis Pin
5/16"x2-3/4" (1)
NOTICE
Handle
Insulated
Staples (10)
Assembly Hardware
Installation Hardware
Dry Wall Anchors (2)
Clevis Pin
5/16"x1" (2)
Hex Screw
5/16"-18x7/8" (4)
Rope
Nut
5/16"-18 (5)
Washered Screw
5/16"-18x1/2" (4)
(2 -mounted in opener)
Carriage Bolt
5/16"-18x2-1/2" (2)
Carriage Bolt
1/4"-20x1/2" (7)
Master Link (2)
Ring
Fastener (3)
Trolley Threaded Shaft (1)
Screw
6ABx1-1/2" (2)
Lock Washer 5/16" (6)
Lag Screw
5/16"-9x1-5/8" (4)
Lock Nut
1/4"-20 (4)
Carriage Bolt
1/4"-20x1/2" (4)
Safety Reversing Sensor
Installation Hardware
Hex Screw
1/4-20x1-1/2" (2)
Screw
#10-32x3/8" (4)
Lock Nut
#10x32 (4)
Wing Nut (2)
Insulated
Staples (20)
RAIL GREASE
NO. 83A4
Rail Grease
Hex Screw
5/16"-18x7/8" (3)
Lag Screw
1/4x1-1/2" (4)
Lock Nut
1/4"-20 (7)
Hex Screw
1/4"-20x5/8" (2)
Screw
#8-32x3/8" (1)
Lock Washer
1/4" (2)
6
Group all hardware found in all packages contained in the rail and opener cartons into
the three kits illustrated below.
7
Assembly Step 1
Assemble the Rail &
Attach the Chain Pulley Bracket
T o avoid installation difficulties, do not run the garage door opener until instructed to do so.
Assembly Section: Pages 7 – 10
Right Wrong
When tightening
the screws, be
sure to keep
bracket parallel to
the rail. Otherwise,
the rail may bow
when the opener is
operated.
• Align the 4 rail sections on a flat surface exactly as
shown. Center sections are interchangeable. Front
and back sections are not. Be sure the arrow
labels are pointing toward the door.
• Insert the carriage bolts so the square bolt necks
seat in the square holes in the rail sections and
pass through the square holes in the opposing rail
sections. Assemble lock nuts, ensure alignment
and tighten.
If rail is not assembled
exactly as shown, trolley
will not travel smoothly
along length of rail or it
will hit against nuts.
• Position the chain pulley bracket on the front end
of the rail as shown. Fasten securely with the
hardware shown.
Lock Nut
1/4"-20x7/16"
Carriage Bolt
1/4"-20x1/2"
Hex Screw
5/16"-18x7/8"
Nut
5/16"-18
Lock Washer
5/16"
Hardware Shown Actual Size
Hex Screws
5/16"-18x7/8"
Chain Pulley
Bracket
Lock Washer
5/16"
Bracket and Rail Must Be Aligned
Nut - 5/16"
TO GARAGE DOOR
Make sure bolt
necks are seated
in the square
holes and rails
are aligned
before you
tighten lock nuts.
(See right and
wrong views).
Improper
assembly can
cause jerky
trolley operation,
noise and/or
nuisance door
reversals.
Right
Wrong
TO GARAGE DOOR
TO GARAGE DOOR
TO GARAGE DOOR
TO GARAGE DOOR
Chain pulley bracket
attaches to FRONT
END of Rail
Rail Assembly
(Door End)
Rail Assembly
(Center Section)
Rail Assembly
(Center Section)
Rail Assembly
(Power Head End)
1/4" Lock
Nuts
Carriage Bolt
1/4"-20x1/2"
RAIL BACK
(TO POWER HEAD)
RAIL FRONT
(TO DOOR)
TO GARAGE DOOR
TO GARAGE DOOR
TO GARAGE DOOR
TO GARAGE DOOR
Temporary Stop
Screwdriver
Trolley
Trolley Stop
Hole
Hex Screw
5/16"-18x7/8"
Nut
5/16"-18
Lock Washer
5/16"
Trolley
Threaded
Shaft
Lock
Washer
5/16"
Outer Nut
5/16"
Inner Nut
5/16"
Trolley
Assembly Step 2
Install the Trolley on the Rail
• Place the power head on packing material to
protect the cover. For convenience, put a support
under the chain pulley bracket.
• Remove the (2) 5/16"-18x1/2" washered screws
mounted in the top of the power head.
• Align the holes in the back section of the rail with
the holes in the power head, as shown.
• Fasten the rail with the (2) washered screws
previously removed. Tighten securely.
Remember to use only these screws!
Any other
screws will cause serious damage to the power
head.
5/16"-18x1/2"
Washered Screws
Trolley Stop
Hole
TO GARAGE DOOR
USE ONLY THIS
TYPE AND SIZE
SCREW
8
• Attach the threaded shaft to the trolley with the
lock washer and nuts as shown.
• As a temporary stop, insert a screwdriver into the
hole in the front end of the rail.
• Slide the trolley assembly along the rail to the
screwdriver stop.
If trolley hits against any nuts on the rail, the
bolts and nuts were attached from the wrong
side and must be repositioned. Review Step 1.
• Insert a 5/16”-18x7/8” hex screw into the trolley stop
hole in the rail as shown. Tighten securely with a
5/16” lock washer and nut. This screw limits trolley
travel in the UP direction.
Assembly Step 3
Fasten the Rail to the Power Head
To fasten rail, use only those screws mounted
in the top of the power head. Any other screws
will cause serious damage to the power head.
Hardware Shown Actual Size
Hex Screw
5/16"-18x7/8"
Nut
5/16"
Lock Washer
5/16"-18
CAUTIONCAUTION
Assembly Step 4
Attach the Chain
& Rail Support Bracket
9
To attach the rail support bracket:
• Position the rail support bracket on the power head.
• Attach the bracket to the rail with 1/4"20x5/8" hex
screws and lock washers.
• Attach the bracket to the power head by inserting a
5/16"-18x1/2" washered screw through a hole in
each side flange and a matching hole in the
bracket. Complete the connection by inserting the
#8-32x3/8" screw through the back flange and the
hole in the rail support.
• Remove the chain end from the carton and fasten
it to the trolley with a master link from the
hardware bag. See master link procedure,
Figure 1.
• With the trolley against the screwdriver, dispense
the chain around the pulley.
• Proceed back around the rail to the power head,
Figure 2. Guide the chain around the chain
spreader and sprocket. Be sure sprocket teeth
engage the chain.
• Continue forward to the trolley threaded shaft,
Figure 3.
• Use the second master link to connect the chain
to the flat end of the shaft. If necessary, loosen the
outer nut on the trolley to obtain more chain slack.
Check to make sure the chain is not twisted.
• Remove the screwdriver.
Figure 2
Figure 1
Serious injury can result if fingers become
entangled in moving opener sprocket. Attach
sprocket cover securely. Never operate opener
while your hand is near the opener sprocket.
Hardware Shown Actual Size
Chain
Pulley
Bracket
Chain
Master
Link Bar
Trolley
Chain
Rail
Pin Notch
Pin
Master Link
Clip-On Spring
Master
Link Cap
Master Link
Clip-On Spring
Master
Link Cap
Install Chain
In This Direction
Flat End
of Trolley
Threaded
Shaft
Figure 3
Master Link Procedure:
Push pins of master link bar through
chain end and hole in front end of
trolley. Push cap over pins and past
notches. Slide clip-on spring over
cap and into notches until both pins
are securely locked.
WARNING
Chain
Spreader
Sprocket
Power Head
1/4"-20x5/8" Hex Screws
5/16"-18x1/2"
Washered Screw
Rail Support
Bracket
with Lock Washers
#8-32x3/8"
Screw
5/16"-18x1/2"
Washered Screw
Power Head
Back Flange
Power Head
Side Flange
Hex Screw
1/4"-20x5/8" (2)
Washered Screw
5/16"-18x1/2" (2)
Lock Washer
Screw
#8-32x3/8" (1)
(2)
• Spin the inner nut and lock washer down the
threaded shaft, away from the trolley.
• To tighten the chain, turn outer nut in the direction
shown. As you turn the nut, keep the chain
from twisting.
• When the chain is approximately 1/2" above the
base of the rail at its midpoint, re-tighten the inner
nut to secure the adjustment.
Sprocket noise can result if chain is either too
loose or too tight.
When installation is complete, you may notice some
chain droop with the door closed. This is normal. If
the chain returns to the position shown when the
door is open,
do not re-adjust the chain.
NOTE: During future maintenance,
ALWAYS
pull
the manual release handle to disconnect trolley
before adjusting chain.
Lock
Washer
To Tighten Outer Nut
Inner Nut
Trolley
Chain
Base of rail
1/2"
To Tighten
Inner Nut
Outer Nut
Assembly Step 5
Tighten the Chain
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 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 qualified 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.
10
You have now finished assembling your garage door opener. Please read the following
warnings before proceeding to the installation section:
WARNING
WARNING
• Open your door to the highest
point of travel as shown. Draw
an intersecting horizontal line
on the header wall 2" above
the high point. This height will
provide travel clearance for the
top edge of the door.
Header
Wall
Ceiling
Track
Highest Point
of Travel
Door
2"
11
Proceed to Step 2, page 12.
Vertical
Guideline
Finished
Ceiling
Vertical
Guideline
Header
Wall
2x4 Structural
Supports
• 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 2 feet to 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 12)
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.
Installation Section: Pages 11 – 23
Installation Step 1
Determine Header Bracket Location
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 26).
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 garage door
service.
WARNING
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