Chamberlain Security+ 3112E FS2 User manual

Owner’s Manual
■Please read this manual and the enclosed safety materials carefully!
■Fasten the manual near the garage door after installation.
■Periodic checks of the opener are required to ensure safe operation.
■The model number label is located on the front panel of your opener.
GARAGE DOOR OPENER
Models 3112E FS2 • 3122E FS2
For Residential Use Only

2
Introduction Pages 2-8
Safety symbol and signal word review........................2
Preparing your garage door ........................................3
Tools needed...............................................................3
Planning ..................................................................4-6
Carton inventory..........................................................7
Hardware inventory .....................................................8
Assembly Pages 9-15
Assemble T-rail & attach the pulley bracket...........9-10
Install the trolley.........................................................11
Fasten the T-rail to the motor unit.............................12
Install the chain/cable and chain spreader ..........13-14
Tighten the chain and cable......................................15
Installation Pages 15-28
Installation safety instructions ...................................15
Determine the header bracket location................16-17
Install the header bracket..........................................18
Attach the T-rail to the header bracket......................19
Position the opener ...................................................20
Hang the opener .......................................................21
Install the door control...............................................22
Install the light ...........................................................23
Attach the emergency release rope and handle .......23
Electrical requirements..............................................24
Fasten the door bracket.......................................25-26
Connect the door arm to the trolley .....................27-28
Adjustment Pages 29-31
Adjust the travel limits ...............................................29
Adjust the force .........................................................30
Test the safety reversal system.................................31
Operation Pages 32-35
Operation safety instructions ....................................32
Using your garage door opener ................................32
Using the wall-mounted door control ........................33
To open the door manually .......................................33
Care of your garage door opener .............................34
Having a problem?...............................................34-35
Programming Pages 36-37
To add or reprogram a hand-held remote control .....36
To erase all codes .....................................................36
Multi-function remotes...............................................36
To add, reprogram or change a Keyless Entry PIN ..37
Repair Parts 38
Accessories 39
Service Numbers 40
Warranty 40
TABLE OF CONTENTS
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.
Mechanical
Electrical
WARNING
CAUTION WARNING
WARNING
WARNING
CAUTION WARNING
WARNING
WARNING
CAUTION
WARNING
WARNING
INTRODUCTION
Safety Symbol
and Signal Word Review
This garage door opener has been designed and tested to offer safe service provided it is installed, operated,
maintained and tested in strict accordance with the instructions and warnings contained in this manual.

3
Pliers
Wire Cutters
Claw Hammer
Hack Saw
Screwdriver
Adjustable End WrenchLocking pliers
Sockets and Wrench
1/2", 5/8", 7/16", 9/16"
and 1/4"
Drill
Tape Measure
2
1
Stepladder
Pencil
Drill Bits
3/16", 5/16"
and 5/32"
Carpenter's
Level (optional)
To prevent damage to garage door and opener:
• ALWAYS disable locks before installing and operating
the opener.
• ONLY operate garage door opener at 120V, 60 Hz to
avoid malfunction and damage.
To prevent possible SERIOUS INJURY or DEATH:
• ALWAYS call a trained door systems technician if
garage door binds, sticks, or is out of balance. An
unbalanced garage door may not reverse when
required.
• NEVER try to loosen, move or adjust garage door, door
springs, cables, pulleys, brackets or their hardware, all
of which are under EXTREME tension.
• Disable ALL locks and remove ALL ropes connected to
garage door BEFORE installing and operating garage
door opener to avoid entanglement.
Preparing your garage door
Before you begin:
• Disable locks.
• Remove any ropes connected to garage door.
•Complete the following test to make sure your
garage door is balanced and is not sticking or
binding:
1. Lift the door about halfway as shown. Release
the door. If balanced, it should stay in place,
supported entirely by its springs.
2. Raise and lower the door to see if there is any
binding or sticking.
If your door binds, sticks, or is out of balance, call a
trained door systems technician.
Tools needed
During assembly, installation and adjustment of the
opener, instructions will call for hand tools as
illustrated below.
WARNING
CAUTION WARNING
WARNING
WARNING
CAUTION
WARNING
WARNING
Sectional Door
One-Piece Door

Safety Reversing Sensor
Support bracket &
fastening hardware
is required.
See page 21.
— — — — — — — —
Header Wall
FINISHED CEILING
Torsion
Spring
Extension
Spring
OR
Safety Reversing Sensor
Gap between floor
and bottom of door
must not exceed 6 mm.
Access
Door
Wall-
mounted
Door
Control
Horizontal and vertical reinforcement
is needed for lightweight garage doors
(fiberglass, steel, aluminum, door with
glass panels, etc.). See page 25 for details.
Motor unit
Slack in chain tension
is normal when
garage door is closed
(Optional Accessory)
(Optional Accessory)
Vertical
Centerline of
Garage Door
4
SECTIONAL DOOR INSTALLATION
Planning
Identify the type and height of your garage door.
Survey your garage area to see if any of the
conditions below apply to your installation. Additional
materials may be required. You may find it helpful to
refer back to this page and the accompanying
illustrations as you proceed with the installation of
your opener.
Depending on your requirements, there are several
installation steps which may call for materials or
hardware not included in the carton.
• Installation Step 1 – Look at the wall or ceiling
above the garage door. The header bracket must
be securely fastened to structural supports.
• Installation Step 5 – Do you have a finished ceiling
in your garage? If so, a support bracket and
additional fastening hardware may be required.
• Do you have an access door in addition to the
garage door? If not, Model 7702CB Outside Quick
Release is required. See Accessories page.
• Look at the garage door where it meets the floor.
Any gap between the floor and the bottom of the
door must not exceed 6 mm. Otherwise, the safety
reversal system may not work properly. See
Adjustment Step 3. Floor or door should be
repaired.
SECTIONAL DOOR INSTALLATIONS
• Do you have a steel, aluminum, fiberglass or glass
panel door? If so, horizontal and vertical reinforce-
ment is required (Installation Step 10).
• 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 1.2 m to the left or right of
the door center. See Installation Steps 1 and 10.
Cable Pulley
Bracket
Header
Bracket Trolley
Straight
Door
Arm Emergency
Release
Rope & Handle
Door Bracket
Garage
Door
Curved
Door
Arm
Garage
Door
Spring
Header
Wall
CLOSED POSITION
Rail
Chain

5
Planning (Continued)
ONE-PIECE DOOR INSTALLATIONS
• Generally, a one-piece door does not require
reinforcement. If your door is lightweight, refer to
the information relating to sectional doors in
Installation Step 10.
• Depending on your door’s construction, you may
need additional mounting hardware for the door
bracket (Step 10).
Without a properly working safety reversal system,
persons (particularly small children) could be
SERIOUSLY INJURED or KILLED by a closing garage
door.
• The gap between the bottom of the garage door and
the floor MUST NOT exceed 6mm. Otherwise, the
safety reversal system may not work properly.
• The floor or the garage door MUST be repaired to
eliminate the gap.
WARNING
CAUTION WARNING
WARNING
Safety
Reversing Sensor
(Optional Accessory)
FINISHED CEILING
Support bracket
& fastening
hardware is required.
See page 21.
Slack in Chain Tension
is Normal When
Garage Door is Closed
Safety
Reversing Sensor
(Optional Accessory)
Header
Wall
Access
Door
Gap between floor and bottom
of door must not exceed 6 mm.
Wall-mounted
Door
Control
Motor Unit
ONE-PIECE DOOR WITHOUT TRACK
CLOSED POSITION
Access
Door
Gap between floor
and bottom of door
must not exceed 6 mm.
Safety Reversing
Sensor
(Optional Accessory)
Wall-
Mounted
Door
Control
Cable
Pulley Bracket
Door
Bracket
Straight
Door
Arm
Trolley
Header
Wall
Rail
Garage
Door
Emergency Release
Rope & Handle
Chain
Header
Bracket
Curved
Door Arm
Safety Reversing
Sensor
(Optional Accessory)
ONE-PIECE DOOR WITH TRACK
CLOSED POSITION
Cable
Pulley Bracket
Header
Bracket
Trolley
Straight
Door
Arm
Emergency
Release
Rope & Handle
Door
Bracket
Curved
Door
Arm
Header
Wall
Cable
Rail
Garage
Door

6
Safety Reversing Sensor
(Optional Accessory)
Safety Reversing Sensor
(Optional Accessory)
Header Wall
Safety Reversing Sensor
(Optional Accessory)
Safety Reversing Sensor
(Optional Accessory)
SLIDING GATE INSTALLATION
SWINGING GATE INSTALLATION
Planning (Continued)
GATE INSTALLATIONS
• It is recommended that you attach fine mesh or
screening across the inside of swinging or sliding
gates in order to prevent intruders from reaching
through the bars and releasing the trolley from the
door arm or pressing the door control button.
• The opener must be protected from rain and/or
moisture.
Without a properly working safety reversal system,
persons (particularly small children) could be
SERIOUSLY INJURED or KILLED by a closing gate.
• Activate gate ONLY when the gate is in full view and
free from any obstructions.
• ALWAYS keep gate in sight until completely closed.
NEVER permit anyone to cross the path of the moving
gate.
• ALWAYS keep gate in good repair and make sure it
moves freely. An improperly maintained gate may not
reverse when required and could result in SEVERE
PERSONAL INJURY or DEATH.
WARNING
CAUTION WARNING
WARNING

7
41B2616
Cable Pulley
Bracket
41B4494-1
2-Conductor Bell Wire
White & White/Red
41A3489
Trolley
41A4353
Header Bracket
178B35
Curved Door
Arm Section
178B34
Straight Door
Arm Section
Safety Labels
and
Literature
12B350
Hanging Brackets
UP
CEILINGMOUNTONLY
41A5047
Door Bracket
950-315CB
SECURITY✚®
Single-Button
Remote Control
956-315CB
SECURITY✚®
3-Button
Remote Control
41A5577-1
Lighted Door
Control Button
41A3473-2
Chain/Cable
Dispensing Carton
Model 3122
31D380
Sprocket
Cover
Rail Brace
Rail Brace
Rail
Center Section
183B111 (each)
Rail
End Section
(each) 183B113
Rail
End Section
183B113 (each)
Motor Unit and Light Lens
Model 3112 (1)
3122 (2)
Model 3112 (1)
41A4208
Chain Spreader & Screws
Model 3112E Only
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.
Parts may be stuck in the foam. Hardware for
assembly and installation is shown on the next page.
Save the carton and packing material until installation
and adjustment is complete.
Carton Inventory

Hardware Inventory
Separate all hardware and group as shown below for the assembly and installation procedures.
8
Hex Bolt
5/16"-18x7/8" (4)
Screw
6ABx1-1/4" (2)
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 41A2848
Installation Hardware 41A3475-18
Drywall Anchors (2)
Rope
Lock Nut
1/4"-20x1/2" (12)
Nut
5/16"-18 (5)
Washered Bolt
5/16"-18x1/2" (2)
(mounted in opener)
Carriage Bolt
5/16"-18x2-1/2" (2)
Carriage Bolt
1/4"-20x1/2" (12)
Hex Bolt
5/16"-18x7/8" (3) Master Link (2)
Ring Fastener (3)
Trolley
Threaded Shaft (1)
Lock Washer
5/16" (6)
Lag Screw
5/16"-9x1-5/8" (2)
Lag Screw
5/16"-18x1-7/8" (2)
Clevis Pin
5/16"x1" (1)
Clevis Pin
5/16"x1-1/4" (1)

RAIL BACK
(TO MOTOR UNIT)
RAIL FRONT
(TO DOOR)
Cable pulley bracket
attaches to FRONT
END of rail
Rail
(End Section)
Rail
(Center Section)
Carriage Bolt
1/4"-20x1/2"
Rail
(End Section)
Square Carriage
Bolt Hole
1/4" Lock Nut
Hex Bolts
5/16"-18x7/8"
Cable Pulley
Bracket
Bracket & Rail Must Be Aligned
Lock Washer
5/16"
Nut
5/16"-18
9
ASSEMBLY STEP 1
For Sectional and
One-Piece Doors ONLY
Assemble the T-Rail and
Attach the Cable Pulley Bracket
To avoid installation difficulties, do not run the
garage door opener until instructed to do so.
1. Align the four T-rail sections on a flat
surface exactly as shown. Center
sections are interchangeable. Front
and back sections are also
interchangeable for ease of assembly.
2. Insert the carriage bolts so the square
bolt necks seat in the square holes in
the T-rail sections and pass through
the round holes in the rail braces.
Assemble lock nuts, ensure alignment
and tighten.
NOTE: If T-rail is not assembled
exactly as shown, trolley will not travel smoothly
along length of rail or it will hit against nuts.
3. Position the cable pulley bracket on the front end
of the T-rail as shown. Fasten securely with the
hardware provided.
NOTE: When tightening the bolts be sure to keep
bracket parallel to the rail. Otherwise, the rail may
bow when the opener is operated.
Lock Nut
1/4"-20
Carriage Bolts
1/4"-20x1/2"
Hex Bolt
5/16"-18x7/8"
Nut
5/16"-18 Lock Washer
5/16"
HARDWARE
SHOWN ACTUAL SIZE

AWAY FROM
OPENER
Rail connects to
opener at this end.
Rail
(End Section)
Carriage Bolt
1/4"-20x1/2"
Rail
(End Section)
Square Carriage
Bolt Hole
1/4" Lock Nut
Brace
Cable pulley bracket
attaches to this
end of rail.
Rail
(Center Section)
10
ASSEMBLY STEP 1
For Sliding and Swinging Gates ONLY
Assemble the T-Rail and
Attach the Cable Pulley Bracket
To avoid installation difficulties, do
not run the garage door opener until
instructed to do so.
1. Align the four T-rail sections on a flat
surface exactly as shown. Center
sections are interchangeable. Front
and back sections are also
interchangeable for ease of
assembly.
2. Connect the center section and the
1/4" lock nuts to the end sections from
the same side, as shown.
NOTE: If T-rail is not assembled exactly as shown,
trolley will not travel smoothly along length of rail
or it will hit against nuts.
3. Insert the carriage bolts from the opposite side of
the end sections. Tighten the nuts. When
assembled, T-rail has a front-to-back position as
shown.
4. Position the cable pulley bracket on the front end
of the T-rail as shown. Fasten securely with the
hardware provided.
NOTE: When tightening the bolts be sure to keep
bracket parallel to the rail. Otherwise, the rail may
bow when the opener is operated.
Lock Nut
1/4"-20
Carriage Bolts
1/4"-20x1/2"
Hex Bolt
5/16"-18x7/8"
Nut
5/16"-18 Lock Washer
5/16"
HARDWARE
SHOWN ACTUAL SIZE
Hex Bolts
5/16"-18x7/8"
Cable Pulley
Bracket
Rail Bracket & Rail Must Be Aligned
Lock Washer
5/16"
Nut
5/16"