LINEAR LLC
(760) 438-7000
3 Locate the Header Bracket Position
7 Install the Wall Station
9 Install the Door Bracket and Door Arm
INSTALLING THE DOOR BRACKET
MARKING THE CENTERLINE
1 Close the door.
1 Fully close the door. Hold the door bracket against the
inside of the door’s top panel. Align the top edge of the
bracket 2” to 4” below the top edge of the door; or, if
there is a structural support across the top of the door,
place the top edge of the bracket directly below the
support. Align the vertical centerline drawn on the door
with the center of the bracket. See the figure for details.
Mark the left and right holes of the bracket.
USA & Canada (800) 835-5666 & (800) 421-1587
Toll Free FAX (800) 468-1340
MARK THE CENTERLINE
OF THE DOOR ON THE
HEADER AND THE TOP
DOOR PANEL
CAUTION! LIGHTWEIGHT SECTIONAL DOORS
NOT DESIGNED FOR USE WITH A GARAGE
DOOR OPENER MUST BE EQUIPPED WITH A
DOOR REINFORCEMENT KIT (CHECK WITH
THE GARAGE DOOR MANUFACTURER)
WARNING
2 From inside the garage, use a pencil to mark the
vertical centerline of the door on the header wall and
on the top panel of the door.
DOOR
BRACKET
Children operating or playing with a garage door operator can injure themselves or others. The garage
door could cause serious injury or death. Do not allow children to operate the remote control(s) or
the wall station. Install the wall station out of reach of children and away from all moving parts of
the door. The door must be clearly visible from the wall station. A moving garage door could injure
someone under it. Only activate the door when it is properly adjusted, when it can be seen clearly
and when there are no obstructions to the door travel.
MODEL LCO75
LIGHT-DUTY CHAIN-DRIVE COMMERCIAL GARAGE DOOR OPERATOR
RESIDENTIAL BELT-DRIVE/CHAIN-DRIVE GARAGE DOOR OPERATOR
3 Examine the area above the center of the door on the
door header wall for a header bracket mounting location.
ALIGN THE DOOR BRACKET
ON THE CENTERLINE 2" TO 4"
BELOW THE TOP EDGE
OF THE DOOR, OR DIRECTLY
BELOW ANY DOOR
STRUCTURAL SUPPORT
DOOR
STRUCTURAL
SUPPORT
DRILL TWO 1/4" PILOT HOLES
USE TWO 1/4-20 x 2" CARRIAGE BOLTS AND
4 Open the door to the high-rise point (the point where
the top edge of the door is highest above the floor) and
measure the distance to the floor.
2 Drill ¼” holes at marks and insert two ¼-20 x 2”
carriage bolts (not supplied) from outside of door
through the door bracket.
INSTALLATION INSTRUCTIONS
For Sectional Type Doors
➤NOTE: 22 AWG 2-conductor wall station and safety
beam wire is supplied with the operator, Use this wire
CONNECTING AND LOCATING THE WALL STATION
NUTS (NOT SUPPLIED) TO ATTACH THE DOOR BRACKET
5 Close the door and use a pencil to mark the header
wall 1” above the measured high-rise point.
CONNECT PUSHBUTTON WIRES
TO WALL STATION'S TERMINALS
or the installation’s pre-wiring. For additional wire,
contact Linear for information regarding the 24-pack
Model HAE00009 wire and wire clip kit.
CONNECTING THE DOOR ARM TO THE DOOR BRACKET
MARKING ABOVE THE HIGH-RISE POINT
3 Secure door bracket with two ¼-20 keps nuts (not
supplied). Tighten with a 7/16” socket.
➤NOTE: In some installations, the header bracket
location will be higher than the door header. This will
require adding a 2x4 (or larger) cross piece to the wall
studs to provide a mounting location for the header
bracket. Use lag screws (not supplied) to attach the
2x4 to the studs.
MARK HEADER
1" ABOVE
CONNECT
SINGLE-HOLE
END OF
IMPORTANT SAFETY NOTES
4 Slide the 5/16” x 1-3/8” clevis pin through one hole on
door bracket; then the single hole on the curved door
arm; then through the other hole on the door bracket.
Secure the clevis pin with the hitch pin.
HIGH-RISE
POINT
INSTALL
HITCH PIN
THE FOLLOWING FORMATS ARE USED FOR
SAFETY NOTES IN THESE INSTRUCTIONS.
Please read the instructions carefully! This garage door
operator is designed to provide safe and reliable service
if installed and tested as described in these instructions.
A garage door is the largest mechanical appliance in a
residence. Care must be taken to prevent injury or death
➤UL NOTE: All low voltage Class 2 cable used with this
operator must be UL Listed Type CL2, CL2P, CL2R, or
DOOR ARM
MOUNT WALL STATION
AT LEAST 5 FEET ABOVE
THE FLOOR LEVEL
CURVED
DOOR
ARM
CL2X or other cable with equivalent or better electrical,
mechanical, and flammability ratings.
WARNING
5 Insert the single hole end of the straight door arm into
the slot in the trolley. Slide the 1-1/8” clevis pin through
the hole and secure it with a hitch pin.
This type of warning note is used to indicate
during installation and operation of the garage door and possible mechanical hazards that may cause
6 On doors with low headroom, the header bracket can
be attached to the ceiling up to 6” back from the header
wall (see next step).
1 Strip back ½” of insulation and connect a wire to each
of the two terminals on the back of the wall station.
MOUNTING THE WALL STATION
1-3/8"
CLEVIS
PIN
SECTIONAL DOOR
garage door operator.
serious injuries or death.
2 Use the screws provided to mount the wall station near
an access door at a minimum height of five feet. SEE
IMPORTANT WARNING ABOVE!
USE MACHINE SCREWS
WHEN MOUNTING TO
A SINGLE-GANG BOX
6 Flip the trolley release lever to disconnect the trolley.
CONNECTING THE DOOR ARM TO THE TROLLEY
USE WOOD SCREWS
WHEN MOUNTING
DIRECTLY TO WALL
7 Rotate the curved door arm upward to meet the
straight door arm connected to the trolley. Align the
two door arms so that the holes in both arms overlap.
4 Install the Header Bracket
1 Hold the header bracket on the center line drawn
above the door with the bottom edge of the bracket on
the line marked above the high-rise point.
ATTACHING THE HEADER BRACKET
WARNING
CAUTION
CENTERLINE OF DOOR
1/2" SOCKET
ROUTE WIRE
THROUGH
SLOT IN
3 For non-prewired installations, route the wire to
the back of the operator. Use insulated staples (not
supplied) to secure the wire. Staples must straddle
both wires to avoid electrical shorts.
This type of warning note is used to indicate
possible electrical shock hazards that may
cause serious injuries or death.
This type of warning note is used to indicate
the possibility of damage to the garage door or
garage door operator.
TROLLEY
➤NOTE: The straight door arm should be slightly angled
toward the operator head.
CASE
ATTACH HEADER
BRACKET WITH
TWO 5/16" x 2"
LAG SCREWS
SLIDE IN THE
1-1/8" CLEVIS PIN
2 Use a pencil to mark the two bracket holes.
1 INCH (SECTIONAL)
PUT HOLE
PLUGS IN
TO HIDE
8 Line up door arms until trolley is positioned as shown.
Connect the arms together using two 5/16-18 x 1” bolts
inserted in the highest and lowest matching holes,
secure the bolts with two 5/16” keps nuts, tighten with
a ½” socket.
3 Drill two 3/16” pilot holes about 2” deep.
4 Cut the wall station wire about 6” longer than needed to
reach the operator terminals. Strip back ½” of insulation.
IMPORTANT INSTALLATION SAFETY INSTRUCTIONS
INSTALL THE
HITCH PIN
4 Use a ½”socket to fasten the bracket with two 5/16” x 2”
lag screws.
SCREWS
5 Connect either wire to the operator’s PUSHBUTTON
terminal and the other wire to the operator’s COMMON
terminal.
WARNING
STRAIGHT DOOR ARM
HIGH-RISE POINT
OF DOOR
TO REDUCE THE RISK OF SEVERE INJURY OR DEATH TO PERSONS, REVIEW
THESE INSTALLATION SAFETY STEPS BEFORE PROCEEDING
READ AND FOLLOW ALL INSTALLATION INSTRUCTIONS.
Install only on a properly balanced garage door. An improperly balanced door 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 the operator.
CONNECTING THE WALL STATION WIRES
CONNECTING THE DOOR ARMS
WIRES TO THE
WALL STATION
6 Apply the User Safety Instruction Label (residential) to
the wall next to the wall station in a prominent location.
Use staples or tacks to help the label remain in place
over time.
5 Connect the Rail to the Header Bracket
1 Place assembled operator on the empty carton on the
floor with rail towards the door.
12"
(APPROXIMATELY)
CONNECTING THE RAIL
1
2
2-3/8" LONG
CLEVIS PIN
LINE UP DOOR ARMS UNTIL
TROLLEY IS POSITIONED
AS SHOWN
2 Insert the end of the rail into header bracket.
7 Install the Entrapment Warning Placard and Duty
Rating Label (commercial) on the wall next to the door.
Use screws to secure the placard to the wall.
INSERT HITCH PIN
INTO CLEVIS PIN
3 Insert the 5/16” x 2-3/8” clevis pin through header
bracket and rail.
CONNECT ARMS WITH
TWO 5/16-18 x 1" BOLTS
IN THE HIGHEST AND
CONNECT THE WALL STATION
WIRES TO PUSHBUTTON AND
COMMON TERMINALS (EITHER
WIRE TO EITHER TERMINAL)
2" TO 4"
LOWEST MATCHING HOLES
4 Secure the clevis pin with the hitch pin.
3
4
Remove all pull ropes and remove, or make inoperative, all locks (unless mechanically and/or
electrically interlocked to the power unit) that are connected to the door before installing the operator.
Ropes connected to a garage door can cause entanglement and death.
➤IMPORTANT! DO NOT PLUG THE OPERATOR IN AT
THIS TIME! More installation is required.
If possible, install door operator 7 feet or more above the floor with the manual release handle mounted
6 feet above the floor. Instruct the end user on the operation of the manual release.
Do not connect the operator to the power source until instructed to do so.
8 Install the Safety Beam
SAFETY BEAM BRACKET OPTIONS
10 Connect the Operator to Power Source
ASSEMBLE BRACKETS
WITH 1/4-20 x 1/2" BOLTS
AND KEPS NUTS
5
6
WARNING
WARNING
WARNING
6 Hang the Operator
PREPARING TO HANG THE OPERATOR
Locate the wall station within sight of the door at a minimum height of 5 feet so that small children
cannot reach it. Locate the wall station away from all moving parts of the door.
Residential Installations: Install the User Safety Label on the wall adjacent to the wall station.
Commercial Installations:Install the EntrapmentWarning Placard and Duty Rating Label in a prominent
location visible in the area of the door.
Persons, particularly children, could be killed by
a closing garage door without a properly installed
and adjusted safety beam optical obstacle
sensing system.
To prevent electrocution or fire, installation
and wiring must be in compliance with local
electrical and building codes.
To reduce the risk of electric shock, this
operator has a grounding pin. This plug will
only fit into a grounding type outlet. If the plug
doesn’t fit into the outlet, contact a qualified
electrician to install the proper outlet. Do not
change the plug in any way.
Installation requirements vary with garage construction.
Hanging brackets should be angled to provide rigid
support. Hanging material is not provided. Angle iron
and lag screws are recommended. DO NOT USE NAILS.
Following are typical operator hanging methods. Certain
installations will require improvised methods.
BRACKET
INDEX
MARKS
7
8
9
Cord and Outlet Connection
➤NOTE: The safety beam’s infrared light beam must
not be obstructed by the door, or by any part of the
door hardware. Use wooden spacers between the
beam brackets and wall if necessary to create proper
clearance.
The operator should be connected to a grounded
receptacle on the ceiling or near the operator head. If
none is available which will accept the grounded operator
plug, one should be installed by a qualified electrician. Do
not use an extension cord.
Upon completion of the installation, the door must reverse when it comes in contact with a 1-1/2”high
object (or a 2x4 laid flat at the center of the door) on the floor and when the infrared safety beam is
blocked.
1 Raise the operator head and set it on top of a
stepladder (use extra spacers on top of ladder if it isn’t
tall enough).
WALL MOUNTING
FLOOR MOUNTING
Do not wear watches, rings or loose clothing while installing or servicing an operator. Jewelry or
loose clothing can be caught in the mechanism of the garage door or the operator.
MARKING THE CORRECT BEAM BRACKET HEIGHT
2 Carefully open the door to the full up position. Lay a
2x4 across the top section of the door as a spacer.
Adjust the operator height until the rail touches the
spacer. The rail should be close to level.
1 Plug the operator into a grounded receptacle.
1 Assemble the two safety beam brackets from the four
L-shaped brackets using two ¼-20 x ¾” bolts and ¼-20
keps nuts (one nut & bolt for each bracket).
POWERING THE OPERATOR
10 DISCONNECT THE ELECTRIC POWER FROM THE GARAGE DOOR OPERATOR BEFORE MAKING
ANY REPAIRS OR REMOVING THE COVER.
2 When the operator is plugged in, a click should sound
in the operator and the lights should turn on. If the
lights do not turn on, check the power source and light
bulbs.
11 Commercial Installations:The rate of operation must not exceed 13 cycles of opening and closing per
hour.
3 Center the operator head and rail with the centerline
mark on the top of the door.
CEILING
OUTLET
WARNING
ADJUSTING OPERATOR HEIGHT
Permanent Wiring
To protect small children, do not install the safety
beam higher or lower than instructed.
4 For finished ceilings only: An angle iron cross piece
between the two closest joists above the operator will
be required. Mark mounting hole locations, drill pilot
holes and attach the piece with two lag screws (not
supplied).
PLACE A 2x4 SPACER
BETWEEN THE DOOR AND RAIL
SOME LOCAL ELECTRICAL CODES REQUIRE
PERMANENT WIRING BETWEEN THE OPERATOR
AND THE POWER SOURCE THROUGH A CONDUIT.
IT IS RECOMMENDED THAT YOU HAVE A LICENSED
ELECTRICAL CONTRACTOR FOLLOW THESE STEPS
ONLY IF PERMANENT WIRING IS REQUIRED.
1 Check the Door Balance
CHECKING THE DOOR BALANCE
LOCATE THE SAFETY BEAM
BRACKETS SO THE BEAM
CENTERLINE IS 6" ABOVE THE FLOOR
1 From outside the garage, slowly open the door all the
PLUG OPERATOR
INTO GROUNDED
OUTLET
2 Position the assembled brackets on each side of the
door so the center line of the safety beam lenses
will be 6” above the floor. Use the index marks on
the brackets to make the bracket assemblies equal
lengths. Mark the locations for the bracket mounting
screws (the brackets can be wall or floor mounted).
way, and then close it all the way. Notice if there is
any binding, sticking or rubbing.The door should move
smoothly in both directions.
5 Measure the distance from each of the operator’s
hanging tabs to the ceiling joists or angle iron cross piece.
INSTALLING THE BEAMS
2 Raise the garage door about halfway up. Carefully
release the door and see if the door balances. It should
stay in place. Close the door.
ADJUST HEIGHT
AS REQUIRED
1 BE SURE POWER CORD IS UNPLUGGED.
6 Cut two angle iron pieces to the required lengths for
hanging brackets. Bend brackets if required.
2 Cut the power cord about 2” above the strain relief
bushing on the operator.
THE DOOR SHOULD
BALANCE WITHOUT
GOING UP OR DOWN
➤NOTE: The safety beam receiver (the unit with two
indicators) should be located on the “shady” side of
the door to prevent sunlight from shining directly into
the receiver’s lens.
➤IMPORTANT: If the garage door is unbalanced or
the door travel isn’t smooth, have a qualified garage
door professional adjust or repair the door.
• For unfinished ceilings: Hold each bracket in place
and use a pencil to mark the locations where they will
be attached to the joists, drill pilot holes and attach the
pieces with two lag screws (not supplied).
FOR PERMANENT WIRING ONLY!
3 Remove the four side screws and bottom cover of
operator.
REMOVING THE POWER CORD
BE SURE THE POWER
CORD IS UNPLUGGED!!
4 Use pliers to remove the strain relief bushing and
discard the bushing.
3 Drill two 3/16” pilot holes for lag screws at marks.
Mount the brackets with two ¼” x 1-1/4” lag screws
and tighten with a 7/16” socket (or use proper concrete
fasteners if floor mounting).
HANGING BRACKET OPTIONS
2 Attach the Rail to the Operator
1 Place the operator head on the garage floor with
cardboard underneath it to protect the finish.
• For finished ceilings with an angle iron cross piece:
Attach the two hanging brackets to the cross piece
with two bolts and two keps nuts (not supplied).
TWIST UNIT TO
LOCK INTO BRACKET
SET TROLLEY LOCATION
INSERT UNIT
INTO BRACKET
CUT THE CORD ABOUT
2" ABOVE THE STRAIN
RELIEF BUSHING
5 Remove the outer insulation from the power cord and
strip the white, black, and green wire insulation back
about ½”.
TYPICAL HANGING BRACKETS
SCREWED DIRECTLY TO JOISTS
SET TROLLEY 12" FROM
PULLEY BRACKET
12"
2 Manually turn the sprocket two full turns
counterclockwise to align the trolley approximately
12 inches from the pulley bracket (see figure).
7 Attach operator to hanging brackets using two 5/16-18 x
1” hex bolts and two 5/16-18 keps nuts (supplied). Insert
bolts from the inside of hanger brackets with the nuts on
the outside of the operator.Tighten nuts with a ½” socket.
4 Insert the sender and receiver into the bracket holes
so the lenses of the units will face each other.Twist the
units until the spring clips lock into a detent mark on
the brackets. To protect the units from being bumped
after installation, it is recommended to mount the
sender and receiver inside the brackets as shown.
PRE-ADJUSTING THE BEAMS
6 Pull white (neutral), black (hot) and green (ground)
wires through conduit.
ALIGNING THE RAIL
LINE UP THE RAIL OVER THE DRIVE SHAFT
ON TOP OF THE OPERATOR HEAD
7 Connecttheconduittotheoperatorwiththeappropriate
termination.
3 Align the rail over the center of the operator head.
ADJUST UNITS SO
TYPICAL HANGING BRACKET
ASSEMBLY USING A CROSSPIECE
8 When using a 12-foot or longer I-rail, install the
center rail support bracket at the middle of the rail.
The bracket attaches with a strap (not included) to a
vertical support.
LENSES POINT
TOWARD EACH
OTHER
4 Be sure the flat on the sprocket lines up with the flat on
the drive shaft.
8 Use wire nuts (not supplied) to connect the wires to the
matching color wires inside operator head.
5 Install the two safety beam protective covers over the
beam units to protect them from damage.
5 Slide the sprocket onto the shaft.
9 Secure the wires away from all moving parts with a
zip-tie as shown in the figure.
6 Attach the rail to the operator head by installing four
¼-20 x ¾” bolts.
FOR PERMANENT WIRING ONLY!
9 Tighten all hanging hardware.
SPRING CLIP LATCHES
INTO DETENT MARKS
TO HOLD UNIT'S POSITION
➤IMPORTANT:Be careful to route the safety beam wiring
away from any moving parts of the door or operator.
CHAIN DRIVE
REMOVING THE BUSHING
BELT DRIVE
10Replace the operator cover and the four side screws.
10Open and close the door manually. The door should
clear the rail by at least 1”.
7 Tighten the four bolts in the order shown with a 7/16”
socket.
BE SURE THE FLAT ON THE SPROCKET
LINES UP WITH THE FLAT ON THE DRIVE SHAFT
HANGING THE OPERATOR
11Connect the conduit wires to the power source at
junction box.
6 For non-prewired installations, route the wires from
the sender and receiver, up the wall above the door
hardware, then over to the center of the door, then along
the top of the rail (or ceiling), and back to the operator
head. Cut the wires about 6” longer than needed to
reach the operator terminals. Strip back ½” of insulation
from the ends of the wires.
11Attach the trolley’s release lever to the red release
handle with the cord supplied so the handle is at least
6 feet from the floor. Cut off any excess cord.
REMOVE STRAIN
RELIEF BUSHING
WITH PLIERS
HANG THE OPERATOR
WITH TWO 5/16-18 x 1"
BOLTS AND NUTS
INSTALLING THE BEAM COVERS
12When power is applied to the operator, a click should
sound and the lights should turn on. If the lights do
not turn on, check the power source, wiring, and light
bulbs.
MATING THE SPROCKET AND SHAFT
SLIDE THE SPROCKET
INTO THE SHAFT
CAUTION
12Press the light cover release tabs in to open the
covers. Install two 100 watt maximum rough service
lamps. Swing the light covers closed, snapping them
shut.
COVER SNAPS
ONTO BRACKET
WITH FOUR TABS
- BELT RAILS HBT7 ONLY! -
TURN THE OPERATOR’S OPEN LIMIT 8 TURNS IN
THE DOWN DIRECTION BEFORE OPERATING UNIT.
7 For non-prewired installations, secure all the wires
to the wall and ceiling with insulated staples (not
supplied). Staples must straddle both wires to prevent
shorts. Secure the wire to the top of the rail with wire
clips (supplied).
LIGHT COVER
RELEASE TAB
MAXIMUM DOOR AREA (IN SQUARE FEET)
STANDARD SECTIONAL DOORS
THE PROTECTIVE
CHAIN DRIVE
COVER CAN ATTACH
TO EITHER SIDE
OF THE BRACKET
TABS FIT INTO SLOTS
DOOR CONSTRUCTION
DOOR
SIZE
BELT DRIVE
8 At the operator, twist one wire from each pair together,
then twist the other wire from each pair together.
Insulated
Steel
Non-insulated
Steel
Other
(SQ. FT.)
FOR PERMANENT WIRING ONLY!
HARDWIRING THE OPERATOR
Construction
ATTACHING THE RAIL
TIGHTEN THE RAIL-TO-HEAD BOLTS IN THIS ORDER
CENTER SUPPORT BRACKET
CONNECTING THE BEAM WIRES
CONDUIT
9 Attach either twisted connection to the operator’s
BEAM terminal. Connect the other twisted connection
to the operator’s COMMON terminal.
CONNECT SUPPORT
BRACKET TO A
HANGER STRAP
BEAM
WIRES
250
Fiberglass
Aluminum
Wood
WALL
STATION
WIRES
WIRE
NUTS
ATTACH THE SUPPORT
BRACKET AT THE CENTER
OF THE RAIL
INSTALL FOUR 1/4-20 x 3/4"
RAIL-TO-HEAD BOLTS
USING A 7/16" SOCKET
(SEE TORQUE ORDER
BELOW)
3
24 Gauge
22 Gauge
CONNECT CONDUIT
WIRING TO OPERATOR
WIRING WITH
210
1
180
120
80
24 Gauge
20 Gauge
16 Gauge
20 Gauge
16 Gauge
WIRE NUTS
PULL THE CHAIN OR BELT
AWAY FROM THE RAIL TO
FIT THE SOCKET ON THE
FRONT BOLTS
GREEN - GROUND
WHITE - NEUTRAL
BLACK - HOT
CONNECT THE SAFETY BEAM
WIRES TO COMMON AND
BEAM TERMINALS (EITHER
WIRE TO EITHER TERMINAL)
2
NOTE: INSTALL
ON 12-FOOT OR
LONGER I-RAILS
HCI-12
12-FOOT
I-RAIL
NOTE: On steel insulated doors,
a 24 gauge back panel is assumed.
NOTE: FOR A 14-FOOT RAIL
USE THE HCI+2 EXTENSION KIT
4
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