Chamberlain 1265LMC 1/2 HP User manual

GARAGE DOOR OPENER
Model 1265LMC
1/2 HP
For Residential Use Only
®
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 front panel of your opener

2
Introduction Pages 2-5
Safety symbol and signal word review ........................2
Preparing your garage door ........................................3
Tools needed...............................................................3
Planning .....................................................................4
Carton inventory..........................................................5
Hardware inventory .....................................................5
Assembly Pages 6-7
Atta h the T-rail to the motor unit ................................6
Atta h the hain to the spro ket..................................6
Tighten the hain.........................................................7
Installation Pages 7-23
Installation safety instru tions .....................................7
Determine the header bra ket lo ation....................8-9
Install the header bra ket..........................................10
Atta h the T-rail to the header bra ket ......................11
Position the opener ...................................................12
Hang the opener .......................................................13
Install the door ontrol...............................................14
Install the lights and lenses.......................................15
Atta h the emergen y release rope and handle .......15
Ele tri al requirements..............................................16
Install the Prote tor System®................................17-19
Fasten the door bra ket .......................................20-21
Conne t the door arm to the trolley .....................22-23
Adjustment Pages 24-26
Adjust the travel limits ...............................................24
Adjust the for e .........................................................25
Test the safety reversal system .................................26
Test the Prote tor System®........................................26
Operation Pages 27-30
Operation safety instru tions.....................................27
Using your garage door opener ................................27
Using the wall-mounted door ontrol ........................28
To open the door manually........................................28
Care of your garage door opener..............................29
Having a problem? ...............................................29-30
Programming Pages 31-32
To add a hand-held remote ontrol ...........................31
To erase all odes .....................................................31
3-Channel remotes....................................................31
To add or hange a Keyless Entry PIN .....................32
Repair Parts Pages 33-34
Rail assembly parts...................................................33
Installation parts ........................................................33
Motor unit assembly parts.........................................34
Accessories 35
Repair Parts and Service 36
Warranty 36
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 omply with the warnings that a ompany them.
The hazard may ome from something me hani al or
from ele tri sho k. Read the warnings arefully.
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 omply with the autionary statements
that a ompany it. Read them arefully.
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 servi e provided it is installed, operated,
maintained and tested in stri t a ordan e with the instru tions and warnings ontained in this manual.

3
Pliers
Wire Cutters
Claw Hammer
Ha k Saw
S rewdriver Adjustable End Wren h
1/2" and 7/16" So kets
and Wren h
Drill
Tape Measure
2
1
Stepladder
Pen il
3/16", 5/16" and
5/32" Drill Bits
Carpenter's
Level
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 lo ks.
• Remove any ropes onne ted to garage door.
•Complete the following test to make sure your
garage door is balan ed and is not sti king or
binding:
1. Lift the door about halfway as shown. Release
the door. If balan ed, it should stay in pla e,
supported entirely by its springs.
2. Raise and lower the door to see if there is any
binding or sti king.
If your door binds, sti ks, or is out of balan e, all
a trained door systems te hni ian.
Tools needed
During assembly, installation and adjustment of the
opener, instru tions will all for hand tools as
illustrated below.
WARNING
CAUTION WARNING
WARNING
WARNING
CAUTION
WARNING
WARNING
Sectional Door
One-Piece Door

Safety Reversing Sensor
Horizontal and verti al reinfor ement
is needed for lightweight garage doors
(fiberglass, steel, aluminum,
door with glass panels, et .).
See page 20 for details.
FINISHED CEILING
Support bra ket &
fastening hardware
is required.
See page 13.
— — — — — — — —
Door
Center
Header Wall
Safety
Reversing
Sensor
Gap between floor and bottom of door
must not ex eed 1/4"
Extension Spring
Torsion Spring
A ess Door
OR
Sla k in hain tension
is normal when
garage door is losed.
Wall-
mounted
Door
Control
Motor Unit
4
SECTIONAL DOOR INSTALLATION
Planning
Identify the type and height of your garage door. Survey your garage area to see if any of the onditions below
apply to your installation. Additional materials may be required. You may find it helpful to refer ba k to this page
and the a ompanying illustrations as you pro eed with the installation of your opener.
FINISHED CEILING
Support bra ket
& fastening
hardware is required.
See page 13.
Sla k in hain tension
is normal when
garage door is losed.
Safety
Reversing Sensor
Header
Wall
A ess
Door
Safety
Reversing Sensor
Gap between floor and bottom of
door must not ex eed 1/4"
Wall-
mounted
Door
Control
Motor Unit
ONE-PIECE DOOR WITHOUT TRACK
A ess
Door
Safety
Reversing Sensor
Safety
Reversing
Sensor
Sla k in hain tension is normal when
garage door is losed
Gap between floor
and bottom of door
must not ex eed 1/4"
ONE-PIECE DOOR WITH TRACK

5
Straight Door
Arm Se tion
Curved Door
Arm Se tion
Safety Labels
and
Literature
Header Bra ket
UP
CEILING MOUNT ONLY
Spro ket Cover
2 Condu tor Bell Wire
White & White/Red
Light Lens (2)
Remote Control
Transmitter Visor Clip
Trolley
One-Pie e
T-rail
Styrofoam
Chain
Pulley Bra ket
Chain
Door Bra ket
Multi-Fun tion
Door Control Panel
LOCK
LIGHT
(2) Safety Reversing Sensors
(1 Sending Eye and 1 Re eiving Eye)
with 2-Condu tor White & White/Bla k
Bell Wire atta hed
Safety Sensor
Bra ket (2)
SECURITY✚
3-Channel Remote Control
Your garage door opener is pa kaged in two artons whi h ontain the motor unit and all parts illustrated below.
A essories will depend on the model pur hased. If anything is missing, arefully he k the pa king material.
Parts may be stu k in the foam. Hardware for installation is also listed below.
Carton Inventory
INSTALLATION HARDWARE
Hex S rew 5/16"-18x7/8" (4)
Lag S rew 5/16"-9x1-5/8" (2)
Lag S rew 5/16"-18x1-7/8" (2)
Clevis Pin 5/16"x2-3/4" (1)
Clevis Pin 5/16"x1-1/4" (1)
Clevis Pin 5/16"x1" (1)
Nut 5/16"-18 (4)
Lo k Washer 5/16" (4)
S rew 6ABx1-1/4" (2)
S rew 6-32x1" (2)
Self-Threading S rew 1/4"-14x5/8" (2)
Insulated Staples (30)
Ring Fastener (3)
Dry Wall An hors (2)
Rope
Handle
Rail Grease
Carriage Bolt 1/4"-20x1/2" (2)
Wing Nut 1/4”-20 (2)

6
ASSEMBLY STEP 1
Attach the T-Rail to the Motor Unit
To avoid installation difficulties, do not run the
garage door opener until instructed to do so
• Remove the two washered s rews mounted in top
of motor unit.
• Position T-rail at a 45˚ angle to opener so one hole
in T-rail and motor unit line up.
• Thread one of the washered s rews part way in.
Use only these screws! Use of any other screws
will cause serious damage to door opener
• Align T-rail and styrofoam over spro ket. Cut tape
from T-rail, hain and styrofoam.
• REMOVE STYROFOAM.
USE ONLY THIS
TYPE AND SIZE
SCREW Washered S rew
5/16"-18x1/2"
Styrofoam
T-rail
Hole
To avoid serious damage to opener, ONLY use screws
mounted in top of motor unit.
WARNING
CAUTION
WARNING
WARNING
ASSEMBLY STEP 2
Attach the Chain to the Sprocket
and Install the Sprocket Cover
• Position hain over the spro ket. If ne essary,
loosen the outer nut on the trolley to obtain more
hain sla k.
• Insert the se ond washered s rew. CAUTION: Use
only the screw previously removed from motor
unit!
• Tighten both s rews se urely through the T-rail into
the motor unit as shown.
• Install the spro ket over: Insert the ba k tab in the
slot. Squeeze the over slightly and insert the front
tab in the slot on the mounting plate.
Proceed to Assembly Step 3.
To avoid possible SERIOUS INJURY to fingers from
moving garage door opener:
• ALWAYS keep hand clear of sprocket while operating
opener.
• Securely attach sprocket cover before operating.
WARNING
CAUTION WARNING
WARNING
USE ONLY THIS
TYPE AND SIZE
SCREW
Washered S rew
5/16"-18x1/2"
Spro ket
Spro ket Cover
Mounting
Plate
Front Tab Slot
Ba k Tab Slot

7
ASSEMBLY STEP 3
Tighten the Chain
• Spin the inner nut and lo k washer down the
threaded shaft, away from the trolley.
• To tighten the hain, turn outer nut in the dire tion
shown. As you turn the nut, keep the chain from
twisting
• When the hain is approximately 1/2" above the
base of the T-rail at its midpoint, re-tighten the inner
nut to se ure the adjustment.
Sprocket noise can result if chain is either too
loose or too tight
When installation is omplete, you may noti e some
hain droop with the door losed. This is normal. If
the hain returns to the position shown when the
door is open, do not re-adjust the hain.
NOTE During future maintenance, ALWAYS pull the
emergency release handle to disconnect trolley
before adjusting chain.
You have now finished assembling your garage
door opener. Please read the following warnings
before proceeding to the installation section.
Lo k
Washer
To Tighten Outer Nut
Inner Nut
Trolley
Chain
Base of T-rail
1/2 In h
To Tighten
Inner Nut
Outer Nut
IMPORTANT INSTALLATION INSTRUCTIONS
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. Install garage door opener 7 feet or more above floor.
6. Mount emergency release handle 6 feet above floor.
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:
• within sight of the garage door
• out of reach of children at minimum height of 5 feet
• away from all moving parts of the door.
10. Place entrapment warning label on wall next to garage
door control.
11. Place manual release/safety reverse test label in plain
view on inside of garage door.
12. Upon completion of installation, test safety reversal
system. Door MUST reverse on contact with a one-
inch high object (or a 2x4 laid flat) on the floor.
To reduce the risk of severe injury or death:
WARNING
CAUTION WARNING
WARNING

8
INSTALLATION STEP 1
Determine the Header Bracket
Location
Installation pro edures vary a ording to garage door
types. Follow the instru tions whi h apply to your
door.
SECTIONAL DOOR
AND ONE-PIECE DOOR WITH TRACK
1. Close the door and mark the inside verti al
enterline of the garage door.
2. Extend the line onto the header wall above the
door.
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 (see
page 10) 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 bra ket on a 2x4
(on wall or eiling), use lag s rews (not provided)
to se urely fasten the 2x4 to stru tural supports as
shown here and on page 10.
3. Open your door to the highest point of travel as
shown. Draw an interse ting horizontal line on the
header wall 2" above the high point. This height will
provide travel learan e for the top edge of the
door.
Proceed to Step 2, page 10. One-piece
door with
horizontal
track
To prevent possible SERIOUS INJURY or DEATH:
• 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.
• Concrete anchors MUST be used if mounting header
bracket or 2x4 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.
Header Wall
Ceiling
Tra k
Highest Point
of Travel
Door
2"
Sectional door
with curved
track
Door
Tra k
Header Wall
Highest Point
of Travel
2"
Verti al
Centerline
Finished
Ceiling
Verti al
Centerline
Header
Wall 2x4 Stru tural
Supports
WARNING
CAUTION WARNING
WARNING

9
Header Wall Verti al
Centerline
Verti al
Centerline
of Garage
Door
2x4
Unfinished
Ceiling
2x4
OPTIONAL
CEILING MOUNT
FOR
HEADER BRACKET
Stru tural
Supports
ONE-PIECE DOOR WITHOUT TRACK
1. Close the door and mark the inside verti al
enterline of your garage door. Extend the line
onto the header wall above door, as shown.
If headroom learan e is minimal, you an install
the header bra ket on the eiling. See page 10.
If you need to install the header bra ket on a 2x4
(on wall or eiling), use lag s rews (not provided)
to se urely fasten the 2x4 to stru tural supports
as shown.
2. Open your door to the highest point of travel as
shown. Measure the distan e from the top of the
door to the floor. Subtra t the a tual height of the
door. Add 8" to the remainder. (See Example).
3. Close the door and draw an interse ting horizontal
line on the header wall at the determined height.
NOTE If the total number of inches exceeds the
height a ailable in your garage, use the maximum
height possible, or refer to page 10 for ceiling
installation.
Door
Highest Point
of Travel
Header Wall
Pivot
Distan e
Floor
One-piece door without track:
pivot hardware
Header Wall
Highest Point
of Travel
Door
Floor
Distan e
Jamb
Hardware
One-piece door without track:
jamb hardware
EXAMPLE
Distan e from top of door
(at highest point of travel) to floor ...................... 92"
A tual height of door .......................................... -88"
Remainder.......................................................... 4"
Add..................................................................... +8"
Bra ket height on header wall............................ =12"
(Measure UP from top of CLOSED door.)
Proceed to Step 2, page 10.

10
INSTALLATION STEP 2
Install the Header Bracket
You an atta h the header bra ket either to the wall
above the garage door, or to the eiling. Follow the
instru tions whi h will work best for your parti ular
requirements. Do not install the header bracket
over drywall If installing into masonry, use
concrete anchors (not provided)
WALL HEADER BRACKET INSTALLATION
• Center the bra ket on the verti al enterline with
the bottom edge of the bra ket on the horizontal
line as shown (with the arrow pointing toward the
eiling).
• Mark the verti al set of bra ket holes (do not use
the holes designated for eiling mount). Drill 3/16"
pilot holes and fasten the bra ket se urely to a
stru tural support with the hardware provided.
Lag S rew
5/16"-9 x 1-5/8"
HARDWARE SHOWN ACTUAL SIZE
Lag S rews
5/16"x9x1-5/8"
Highest Point of
Garage Door Travel
Verti al
Center Line
Header
Wall
Garage
Door
UP
CEILING MOUNT ONLY
Wall Mounting Holes
Optional
Wall Mounting Holes
The nail hole is for
positioning only.
You must use lag s rews
to mount the header bra ket.
UP
CEILING MOUNT ONLY
Door Spring
Header
Bra ket
2x4
Stru tural
Support
Verti al
Center Line
UP
CEILING MOUNT ONLY
Ceiling Mounting Holes
The nail hole is for
positioning only.
You must use lag s rews
to mount the header bra ket.
UP
Lag S rews
5/16"x9x1-5/8"
Garage Door
Verti al Centerline
Header Wall
– Finished Ceiling –
Header
Bra ket
6" Maximum
Verti al
Centerline
Door
Spring
CEILING HEADER BRACKET INSTALLATION
• Extend the verti al enterline onto the eiling as
shown.
• Center the bra ket on the verti al mark, no more
than 6" from the wall. Make sure the arrow is
pointing toward the wall. The bra ket an be
mounted flush against the eiling when learan e
is minimal.
• Mark the side holes. Drill 3/16" pilot holes and
fasten bra ket se urely to a stru tural support with
the hardware provided.