Linear LDO50 User Manual

LINEAR LLC

USA & Canada [phone] & [phone]

Toll Free FAX [phone]

[phone]

www.linearcorp.com

MODELS LDO33 & LDO50
BELT-DRIVE OR CHAIN-DRIVE
GARAGE DOOR OPERATORS

INSTALLATION INSTRUCTIONS

For Sectional and Jamb Type Doors

IMPORTANT SAFETY NOTES

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
during installation and operation of the garage door and
garage door operator.

WARNING

This type of warning note is used to indicate
possible electrical shock hazards that may
cause serious injuries or death.

THE FOLLOWING FORMATS ARE USED FOR

SAFETY NOTES IN THESE INSTRUCTIONS.

WARNING

This type of warning note is used to indicate
possible mechanical hazards that may cause
serious injuries or death.

CAUTION

This type of warning note is used to indicate
the possibility of damage to the garage door or
garage door operator.

IMPORTANT INSTALLATION SAFETY INSTRUCTIONS

WARNING

TO REDUCE THE RISK OF SEVERE INJURY OR DEATH TO PERSONS, REVIEW

THESE INSTALLATION SAFETY STEPS BEFORE PROCEEDING

1 READ AND FOLLOW ALL INSTALLATION INSTRUCTIONS.

2 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.

3 Disable all locks and remove all ropes connected to the garage door before installing the operator.

Ropes connected to a garage door can cause entanglement and death.

4 If possible, install door operator 7 feet or more above the floor with the manual release handle

mounted 6 feet above the floor.

5 Do not connect the operator to the power source until instructed to do so.

6 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.

7 Install the User Safety Label on the wall adjacent to the wall station.

8 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.

9 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.

10 DISCONNECT THE ELECTRIC POWER FROM THE GARAGE DOOR OPERATOR BEFORE MAKING

ANY REPAIRS OR REMOVING THE COVER.

1 Check the Door Balance

1 From outside the garage, slowly open the door all the

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.

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.

� 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.

2 Attach the Rail to the Operator

1 Place the operator head on the garage floor with

cardboard underneath it to protect the finish.

� NOTE: To prevent upsetting the pre-adjusted door

limits in the operator, keep the trolley at the same place
on the rail until the sprocket is on the drive shaft.

2 Align the rail over the center of the operator head.

3 Be sure the flat on the sprocket lines up with the flat on

the drive shaft.

4 Slide the sprocket onto the shaft.

5 Attach the rail to the operator head by installing four

¼-20 x ¾” bolts.

6 Tighten the four bolts in the order shown with a 7/16”

socket.

CAUTION

- BELT RAILS HBT7 ONLY! -

TURN THE OPERATOR’S OPEN LIMIT 4 TURNS IN
THE DOWN DIRECTION BEFORE OPERATING UNIT.

CHECKING THE DOOR BALANCE

THE DOOR SHOULD
BALANCE WITHOUT
GOING UP OR DOWN

ALIGNING THE RAIL

CHAIN DRIVE

MATING THE SPROCKET AND SHAFT

CHAIN DRIVE

ATTACHING THE RAIL

TIGHTEN THE RAIL-TO-HEAD BOLTS IN THIS ORDER

LINE UP THE RAIL OVER THE DRIVE SHAFT
ON TOP OF THE OPERATOR HEAD

BE SURE THE FLAT ON THE SPROCKET
LINES UP WITH THE FLAT ON THE DRIVE SHAFT

TABS FIT INTO SLOTS

1

2

INSTALL FOUR 1/4-20 x 3/4"
RAIL-TO-HEAD BOLTS
USING A 7/16" SOCKET

PULL THE CHAIN OR BELT
AWAY FROM THE RAIL TO
FIT THE SOCKET ON THE
FRONT BOLTS

BELT DRIVE

SLIDE THE SPROCKET
INTO THE SHAFT

BELT DRIVE

3 Locate the Header Bracket Position

1 Check whether door is a sectional or one-piece jamb type.

Note the differences in mounting header bracket,
door arm assembly and hanging the operator.

2 Close the door.

3 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 a sectional door or on the top edge
of a jamb door.

4 Examine the area above the center of the door on the

door header wall for a header bracket mounting location.

5 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.

6 Close the door and use a pencil to mark the header

wall 1” above (sectional) or 7” above (jamb) the
measured high-rise point.

� 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.

7 On sectional doors with low headroom, the header

bracket can be attached to the ceiling up to 6” back
from the header wall (see next step).

MARKING THE CENTERLINE

MARKING ABOVE THE HIGH-RISE POINT

MARK HEADER
1" ABOVE

SECTIONAL DOOR JAMB DOOR

HIGH-RISE
POINT

MARK THE CENTERLINE
OF THE DOOR ON THE
HEADER AND THE TOP
DOOR PANEL

IF JAMB DOOR
MARK THE TOP
EDGE OF THE DOOR

HIGH-RISE
POINT

MEASURE
DISTANCE
TO FLOOR

CLOSE DOOR
AND MARK
HEADER 7"
ABOVE

4 Install the Header Bracket

Attaching the Header Bracket to the Wall

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.

2 Use a pencil to mark the two bracket holes.

3 Drill two 3/16” pilot holes about 2” deep.

4 Use a ½” socket to fasten the bracket with two 5/16” x 2”

lag screws.

Attaching the Header Bracket to the Ceiling

� NOTE: On a finished ceiling, be sure there is a joist

to fasten to under the sheetrock where the header
bracket will be located (use a stud finder). If there is
none, install a 2x4 cross piece between the two closest
joists to fasten the header bracket onto.

1 Extend the center line drawn on the header wall along

the ceiling.

2 Hold the bracket on the center line with the edge of the

bracket no further than 6” from the header wall.

3 Use a pencil to mark the two bracket holes.

4 Drill two 3/16” pilot holes about 2” deep.

5 Use a ½” socket to fasten the bracket with two

5/16” x 2” lag screws.

ATTACHING THE HEADER BRACKET

1/2" SOCKET

ATTACH HEADER
BRACKET WITH
TWO 5/16" x 2"
LAG SCREWS

ATTACHING THE HEADER BRACKET TO THE CEILING

NO MORE

THAN 6 INCHES

DOOR
HEADER
WALL

FOR LOW HEADROOM SECTIONAL
DOOR INSTALLATIONS ONLY

CENTERLINE OF DOOR

HIGH-RISE POINT
OF DOOR

CENTERLINE OF DOOR

1 INCH (SECTIONAL)
2 INCHES (JAMB)

5 Connect the Rail to the Header Bracket

1 Place assembled operator on the empty carton on the

floor with rail towards the door.

2 Insert the end of the rail into header bracket.

3 Insert the 5/16” x 2-3/8” clevis pin through header

bracket and rail.

4 Secure the clevis pin with the hitch pin.

CONNECTING THE RAIL

INSERT HITCH PIN
INTO CLEVIS PIN

2-3/8" LONG
CLEVIS PIN

6 Hang the Operator

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. Cer tain
installations will require improvised methods.
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).

2 SECTIONAL DOORS: 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.

JAMB DOORS: Carefully open the door to the high-

rise point. Adjust the operator height until the rail is 2”
above the door high-rise point. The rail should angle
up towards the header wall.

3 Center the operator head and rail with the centerline

mark on the top of the door.

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).

5 Measure the distance from each of the operator’s

hanging tabs to the ceiling joists or angle iron cross piece.

6 Cut two angle iron pieces to the required lengths for

hanging brackets. Bend brackets if required.

• 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 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).

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.

8 Tighten all hanging hardware.

9 Open and close the door manually. The door should

3

clear the rail by at least 1”.

10 Attach 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.

4

11 Swing open the light cover to access the lamp socket.

Install a 100 watt maximum rough service in the lamp

PREPARING TO HANG THE OPERATOR

ADJUSTING OPERATOR HEIGHT

JAMB DOOR

HANGING BRACKET OPTIONS

TYPICAL HANGING BRACKETS
SCREWED DIRECTLY TO JOISTS

HANGING THE OPERATOR

HANG OPERATOR
WITH TWO 5/16-18 x 1"
BOLTS AND NUTS

PLACE A 2x4 SPACER
BETWEEN THE DOOR AND RAIL

SECTIONAL DOOR

2" MAXIMUM BETWEEN
HIGH-RISE POINT AND
BOTTOM OF RAIL

ADJUST HEIGHT
AS REQUIRED

TYPICAL HANGING BRACKET
ASSEMBLY USING A CROSSPIECE

7 Install the Wall Station

WARNING

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.

� NOTE: 22 AWG 2-conductor wall station and safety

beam wire is supplied with the operator, Use this wire
or the installation’s pre-wiring. For additional wire,
contact Linear for information regarding the 24-pack
Model HAE00009 wire and wire clip kit.

� UL NOTE: All low voltage Class 2 cable used with this

operator must be UL Listed Type CL2, CL2P, CL2R, or
CL2X or other cable with equivalent or better electrical,
mechanical, and flammability ratings.

1 Strip back ½” of insulation and connect a wire to each

of the two terminals on the back of the wall station.

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!

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.

4 Cut the wall station wire about 6” longer than needed to

reach the operator terminals. Strip back ½” of insulation.

5 Connect either wire to the operator’s PUSHBUTTON

terminal and the other wire to the operator’s COMMON
terminal.

6 Apply the User Safety Instruction Label to the wall next

to the wall station. Use staples or tacks to help the
label remain in place over time.

� IMPORTANT! DO NOT PLUG THE OPERATOR IN AT

THIS TIME! More installation is required.

8 Install the Safety Beam

WARNING

Persons, particularly children, could be killed
by a closing garage door without a properly
installed and adjusted safety beam optical
obstacle sensing system.

� 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.

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).

WARNING

To protect small children, do not install the
safety beam higher or lower than instructed.

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).

� 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.

3 Drill two 3/16” pilot holes for lag screws at marks.

Mount the brackets with two ¼” x 1-¼” lag screws and
tighten with a 7/16” socket (or use proper concrete
fasteners if floor mounting).

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.

� IMPORTANT: Be careful to route the safety beam wiring

away from any moving parts of the door or operator.

5 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.

6 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).

7 At the operator, twist one wire from each pair together,

then twist the other wire from each pair together.

8 Attach either twisted connection to the operator’s

BEAM terminal. Connect the other twisted connection
to the operator’s COMMON terminal.

CONNECTING AND LOCATING THE WALL STATION

MOUNTING THE WALL STATION

ROUTE WIRE
THROUGH
SLOT IN
CASE

CONNECTING THE WIRES TO OPERATOR

CONNECT WALL STATION WIRES
TO PUSHBUTTON AND COMMON
TERMINALS (EITHER WIRE
TO EITHER TERMINAL)

ASSEMBLING THE BRACKETS

SAFETY BEAM BRACKET OPTIONS

WALL MOUNTING FLOOR MOUNTING

MARKING THE CORRECT BEAM BRACKET HEIGHT

LOCATE THE SAFETY BEAM
BRACKETS SO THE BEAM
CENTERLINE IS 6" ABOVE THE FLOOR

INSTALLING THE BEAMS

INSERT UNIT
INTO BRACKET

PRE-ADJUSTING THE BEAMS

CONNECTING THE BEAM WIRES

CONNECT SAFETY BEAM WIRES
TO COMMON AND BEAM
TERMINALS (EITHER WIRE
TO EITHER TERMINAL)

CONNECT PUSHBUTTON WIRES
TO WALL STATION'S TERMINALS

MOUNT WALL STATION
AT LEAST 5 FEET ABOVE
THE FLOOR LEVEL

USE WOOD SCREWS
WHEN MOUNTING
DIRECTLY TO WALL

PUT HOLE
PLUGS IN
TO HIDE
SCREWS

ADJUST UNITS SO
LENSES POINT TOWARD
EACH OTHER

SPRING CLIP LACTHES
INTO DETENT MARKS
TO HOLD UNIT'S POSITION

USE MACHINE SCREWS
WHEN MOUNTING TO
A SINGLE-GANG BOX

WIRES TO
WALL STATION

ASSEMBLE BRACKETS
WITH 1/4-20 x 3/4" BOLTS
AND KEPS NUTS

BRACKET
INDEX
MARKS

TWIST UNIT TO
LOCK INTO BRACKET

PUSHBUTTON
WIRES

BEAM
WIRES

9 Install the Door Bracket and Door Arm

SECTIONAL DOORS

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.

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.

3 Secure door bracket with two ¼-20 keps nuts (not

supplied). Tighten with a 7/16” socket.

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.

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.

6 Flip the trolley release lever to disconnect the trolley.

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.

� NOTE: The straight door arm should be slightly angled

toward the operator head.

JAMB DOORS

1 With the door fully open, hold the door bracket on the

vertical centerline drawn on top edge of the door. Use a
pencil to mark the four mounting holes of the bracket.

2 Drill ¼” holes at marks and fasten the bracket with two

5/16” x 2” lag screws to the top of the door.

3 Slide the 5/16” x 1-3/8” clevis pin through one hole on

door bracket; then the single hole on the straight door
arm; then through the other hole on the door bracket.
Secure the clevis pin with the hitch pin.

4 Insert the single hole end of the curved 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.

5 Flip the trolley release lever to disconnect the trolley.

6 Rotate the straight door arm upward to meet the

curved door arm connected to the trolley. Align the two
door arms so that the holes in both arms overlap.

CONNECTING DOOR ARMS

1 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.

INSTALLING THE DOOR BRACKET (SECTIONAL DOOR)

DRILL TWO 1/4" PILOT HOLES
USE TWO
NUTS (NOT SUPPLIED) TO ATTACH THE DOOR BRACKET

INSTALLING THE DOOR BRACKET (JAMB DOOR)

ALIGN CENTER OF
DOOR BRACKET
WITH CENTERLINE
DRAWN ON DOOR

CONNECTING THE DOOR ARM TO THE DOOR BRACKET

INSTALL
HITCH PIN

SECTIONAL DOOR JAMB DOOR

CONNECTING THE DOOR ARM TO THE TROLLEY

CONNECTING THE DOOR ARMS

JAMB DOOR

10 Connect the Operator to Power Source

WARNING

To prevent electrocution or fire, installation
and wiring must be in compliance with local
electrical and building codes.

Cord and Outlet Connection

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.
1 Plug the operator into a grounded receptacle.

2 When the operator is plugged in, a click should sound

in the operator and the light should turn on. If light
does not turn on, check the power source and light
bulb.

Permanent Wiring

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 BE SURE POWER CORD IS UNPLUGGED.

2 Cut the power cord about 2” above the strain relief

bushing on the operator.

3 Remove the four side screws and bottom cover of

operator.

4 Use pliers to remove the strain relief bushing and

discard the bushing.

5 Remove the outer insulation from the power cord and

strip the white, black, and green wire insulation back
about ½”.

6 Pull white (neutral), black (hot) and green (ground)

wires through conduit.

7 Connect the conduit to the operator with the

appropriate termination.

8 Use wire nuts (not supplied) to connect the wires to the

matching color wires inside operator head.

9 Secure the wires away from all moving parts with a

zip-tie as shown in the figure.

10 Replace the operator cover and the four side screws.

11 Connect the conduit wires to the power source at

junction box.

12 When power is applied to the operator, a click should

sound and the light should turn on. If the light does
not turn on, check the power source, wiring, and light
bulb.

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.

POWERING THE OPERATOR

REMOVING THE POWER CORD

CUT THE CORD ABOUT
2" ABOVE THE STRAIN
RELIEF BUSHING

REMOVING THE BUSHING

HARDWIRING THE OPERATOR

CONNECT CONDUIT
WIRING TO OPERATOR
WIRING WITH
WIRE NUTS

GREEN - GROUND
WHITE - NEUTRAL
BLACK - HOT

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)

DOOR

STRUCTURAL

SUPPORT

BOLTS AND

CURVED

DOOR

ARM

CONNECT

SINGLE-HOLE

END OF

DOOR ARM

LINE UP DOOR ARMS UNTIL TROLLEY
IS POSITIONED AS SHOWN

18"

CONNECT ARMS WITH
TWO 5/16-18 x 1" BOLTS
IN THE HIGHEST AND
LOWEST MATCHING HOLES

BRACKET

1/4-20 x 2" CARRIAGE

1-3/8"

CLEVIS

PIN

TROLLEY

APPROXIMATELY

DOOR

WARNING

PLUG OPERATOR
INTO GROUNDED
OUTLET

FOR PERMANENT WIRING ONLY!

BE SURE THE POWER

CORD IS UNPLUGGED!!

FOR PERMANENT WIRING ONLY!

REMOVE STRAIN
RELIEF BUSHING
WITH PLIERS

FOR PERMANENT WIRING ONLY!

ALIGN THE DOOR BRACKET

ON THE CENTERLINE 2" TO 4"

BELOW THE TOP EDGE

OF THE DOOR, OR DIRECTLY

BELOW ANY DOOR

STRUCTURAL SUPPORT

USE TWO
5/16" X 2"
LAG SCREWS
TO FASTEN
BRACKET TO
DOOR

STRAIGHT

SLIDE IN THE
1-1/8" CLEVIS PIN

INSTALL THE
HITCH PIN

2" TO 4"

CONDUIT

DOOR
ARM

4" TO 6"

SECTIONAL DOOR

CEILING
OUTLET

WIRE
NUTS

INSTALL
HITCH PIN

1-3/8"

CLEVIS

PIN

STRAIGHT DOOR ARM (SECTIONAL)
CURVED DOOR ARM (JAMB)

socket. Swing the light cover closed, snapping it shut.

11 Aligning the Infrared Safety Beam

IF PROPERLY

BALANCED, THE

DOOR WILL STAY AT A

HALFWAY POSITION

IF PROPERLY

BALANCED, THE

DOOR WILL STAY AT A

HALFWAY POSITION

ADDING A REMOTE

The safety beam has two components, a sender and a receiver. The sender produces a narrow infrared beam that
travels across the bottom of the door opening to the infrared receiver. If an object blocks the infrared beam while the
door is closing, the door will stop, then reverse and fully open (the operator’s light will flash three times).

As a safety feature, the operator will ignore signals from all remote controls if the door is open and the
infrared safety beam is blocked or out of alignment. In this case, the door can be forced closed by pressing
and holding the wall station’s up/down arrow pushbutton (be sure the door area is in clear view).

WARNING

With the door closed, disengage the trolley
from the chain during these alignment tests by
pulling the red release handle.

Safety Beam Test

Serious injury or death from a closing garage
door may result because of failure to test and
adjust safety reverse system. Repeat this test
monthly and adjust as needed.

WARNING

1 Check that the operator has power. The green lights on

the sender and receiver should be lit.

2 If the receiver’s green light is on, but the red light is off,

SAFETY BEAM INDICATORS

the receiver has power but is not detecting the infrared
beam from the sender. The red light might flash when
the beam is partially detected. This can be caused by
mis-alignment or something blocking the beam. Adjust
the safety beam sender and receiver while watching the
receiver’s red light (stay out of the beam while aligning
it). When the red light stays on, the beam is aligned.

SAFETY BEAM INDICATOR TABLE

GREEN ON POWER ON

GREEN OFF POWER OFF

RED ON BEAM OK - NO BLOCKAGE

RED OFF BEAM BLOCKED OR MIS-ALIGNED

RED FLASHING BEAM ALIGNED POORLY

� NOTE: If the receiver’s red light remains off, check

GREEN LIGHT

ON = POWER ON
OFF = POWER OFF

RED LIGHT

ON = BEAM ALIGNED, NO OBSTRUCTION
OFF = BEAM NOT ALIGNED, OR OBSTRUCTION
BLINKING = BEAM NEEDS BETTER ALIGNMENT

ADJUSTING THE BEAM

ADJUST THE SENDER
AND RECEIVER UNTIL
THE RED INDICATOR
LIGHTS SOLID

RED LIGHT

GREEN LIGHT

for: 1) Dirt on the receiver’s lens, 2) Sunlight shining
into the receiver’s lens, 3) A short in the safety beam
wiring (from staples or at the operator terminals).

3 With the door closed and the operator disengaged

from the door, press the wall station’s UP/DOWN

ARROW button to move the traveler (the part on the

CHECKING FOR REVERSAL

belt or chain that the trolley engages with) to the up
position (away from the door).

4 Push the wall station’s UP/DOWN ARROW button again.

While the traveler is moving to the down position (toward
the door), block the safety beam. THE TRAVELER MUST
STOP, THEN REVERSE TO THE UP POSITION. The
operator’s light should flash three times.

5 Place an object in the path of the safety beam. Check

that constant pressure is required on the wall station’s
UP/DOWN ARROW button to cause the traveler
to move toward the down position. Release the
pushbutton before the operator stops; check that the
traveler returns to the up position.

� NOTE: The garage door operator will not respond

to a CLOSE command from a radio transmitter if the

BLOCK THE BEAM
WHILE THE TRAVELER
IS MOVING DOWN

CHECKING FORCED CLOSURE FEATURE

THE TRAVELER MUST REVERSE
WHEN THE BEAM IS INTERRUPTED

DOWN

UP

TOWARD
DOOR

TRAVELER

VERIFY THAT CONSTANT
PRESSURE IS REQUIRED
ON THE WALL STATION'S
PUSHBUTTON TO MAKE
THE TRAVELER GO DOWN

safety beam is blocked.

6 To reconnect the operator, flip the release lever

up. Raise the door manually until the operator
reconnects.

PLACE AN OBJECT
IN THE BEAM'S PATH

RELEASE PUSHBUTTON
BEFORE THE OPERATOR STOPS,
THE TRAVELER SHOULD
RETURN TO THE UP POSITION

12 Remote Controls

The operator is supplied with a three-button remote control (the second and third buttons can be used to control an
additional operator or gate if it contains a Linear MegaCode™ receiver). Additional single and multi-button remote
controls can be purchased. An unlimited number of remote controls can be used with this operator. The short white
wire on the back of the operator serves as an antenna for the remote controls. Do not cut off the white wire or the
remote controls will not operate well.

WARNING

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. A moving garage
door could injure or kill someone under it. Activate
the operator only when the door is clearly visible,
free of obstructions and adjusted properly.

To Add or Remove a Remote Control

1 Press the operator’s LEARN button. The red LEARN

light will glow. The red light will stay on for about 15
seconds. A remote must be added or removed while

the red LEARN light is still on.

2 Send a signal from a remote. The opener’s light and

the red light will flash once if a remote was added, or
the opener’s light and the red light will flash four times
if a remote was removed.

3 Repeat Steps 1 & 2 for any additional remote controls.

To Remove all Remote Controls

1 Press and hold the operator’s LEARN button for ten

seconds or more.

2 Release the LEARN button. The red LEARN light will

blink three times signaling that all of the remotes
in the operator’s memory were erased. The red

LEARN light will turn off, then turn on for 15 seconds.
A remote control can be entered during this time using
Step 2 above.

Testing

1 Before testing the remote control, straighten out the

operator’s white antenna wire so it points up.

2 Stand clear of the door, press the remote control’s

button and verify that the operator starts. PRESS THE

REMOTE CONTROL’S BUTTON AGAIN TO STOP
THE DOOR MID-TRAVEL.

3 Set the open and close limits as described in the

next section before any further testing.

Replacing a Remote Control’s Batteries

When the red light on the remote glows dimly, or fails to
light at all when the remote is activated, the batteries need
replacing.

1 Open the remote’s case and remove the circuit board.

2 Replace old batteries with two Type 2032 batteries.

3 Re-assemble the remote.

PREPARING TO ADD A REMOTE

1

PRESS THE LEARN BUTTON

1

SEND A SIGNAL
FROM A REMOTE

PRESS A

- OR -

BUTTON

REMOVING ALL REMOTES

1

PRESS THE LEARN BUTTON
FOR 10 SECONDS OR MORE

REPLACING A REMOTE'S BATTERY

1

TWIST DIME IN
SLOT TO OPEN
CASE

3

CAREFULLY
REMOVE THE
CIRCUIT BOARD

4

REMOVE OLD
BATTERIES AND
DISPOSE OF THEM PROPERLY

ENTER A CODE
AND PRESS
START/STOP

2

LEARN LIGHT WILL
GLOW FOR 15 SECONDS

REMOTE MUST BE
ENTERED WHILE LEARN
LIGHT IS ON

DOWN

UP

CLOSE LIMIT

DOWN

UP

OPEN LIMIT

2

THE OPENER'S LIGHT AND RED

LIGHT WILL FLASH ONCE IF A

REMOTE IS ADDED, THE

OPENER’S LIGHT AND RED

LIGHT WILL FLASH FOUR TIMES

IF A REMOTE IS REMOVED

2

THE LEARN LIGHT
WILL BLINK 3 TIMES
SIGNALING THAT
ALL REMOTES WERE
REMOVED

2

LIFT OFF
THE TOP OF
THE CASE

NOTE:

THE CIRCUIT BOARD WILL FIT ONLY ONE
WAY INTO THE CASE. ALIGN THE PLASTIC POST
IN THE CASE WITH THE HOLE IN THE CIRCUIT BOARD

5

INSERT TWO NEW
TYPE 2032 BATTERIES
PLUS SIDE UP THEN
REASSEMBLE UNIT

TOWARD
OPERATOR

13 Adjusting the Open and Close Limits

The limit adjustments that control how far the door will
open or close are located on the side of the operator. The
limits should be adjusted so the door opens just short of
any door stops, and closes right at the floor level. Each
full turn of a limit adjustment equals about 2-½” of door
travel.

CAUTION

Set the open and close limits carefully. Setting
the limits beyond the distance that the door can
travel could cause damage to the door, the door
hardware, or operator.

1 If this is a jamb door installation, with the operator

at mid-travel, turn the CLOSE LIMIT adjustment
five turns in the UP direction before proceeding.

2 Activate the remote control. Wait while the door moves

to the open position and stops.

3 Examine the position of the door.

• If the door needs to open more, turn the OPEN LIMIT
adjustment clockwise ¼-turn (towards UP on the label)
to raise the open limit.

• If the door needs to open less, turn the OPEN LIMIT
adjustment counterclockwise ¼-turn (towards DOWN
on the label) to lower the open limit.

� NOTE: On jamb doors, set the open limit so the door

stops just short of level (see figure).

4 Activate the remote control. Wait for the door to move

down a few feet, then activate the remote control again
to stop the door.

5 Repeat Steps 2-4 until the open limit is properly

adjusted.

6 Activate the remote control. Wait while the door moves

to the closed position and stops.

7 Examine the position of the door.

• If the door needs to close more, turn the CLOSE
LIMIT adjustment counterclockwise ¼-turn (towards
DOWN on the label) to lower the close limit.

• If the door needs to close less, turn the CLOSE LIMIT
adjustment clockwise ¼-turn (towards UP on the label)
to raise the close limit.

8 Activate the remote control. Wait for the door to move

up a few feet, then activate the remote control again to
stop the door.

9 Repeat Steps 6-8 until the close limit is properly adjusted.

� NOTE: If the door stops during opening or reverses

during closing before reaching the limits, the door force
adjustment needs to be set. Change the adjustment as
described in the next section then return to this section
to finish setting the limits.

CHECKING WHERE THE DOOR STOPS

SETTING THE OPEN LIMIT ON A JAMB DOOR

JAMB DOOR

NOTE: SETTING THE OPEN LIMIT TOO HIGH WILL CAUSE
THE OPERATOR TO "BUCK" WHEN STARTING DOWN

SETTING THE OPEN LIMIT

UP

DOWN

OPEN LIMIT

ADJUSTMENT

CHECKING WHERE THE DOOR STOPS

UP

DOWN

SETTING THE CLOSE LIMIT

UP

DOWN

CLOSE LIMIT

ADJUSTMENT

14 Testing & Adjusting the Door Force Safety System

The door force adjustments are located on the side of the
operator. The door force adjustments must be properly
set at all times. The CLOSE FORCE adjustment controls
how much force is required to cause the door to reverse
direction if an obstruction is encountered during closing.
The OPEN FORCE adjustment controls how much
force is required to stop the door if an obstruction is
encountered during opening.

SETTING THE DOOR FORCE

WARNING

Too much door force will interfere with the
proper operation of the safety system. SOMEONE
COULD BE SERIOUSLY INJURED OR KILLED IF THE
DOOR FORCE IS SET TOO HIGH. A closing door
might not reverse properly when required and
someone could be pinned under it. An opening
door might not stop when going up and someone
hanging on the door could get pinned between
the door and the header. Do not increase the
door force beyond what is required to move the
door. DO NOT USE THE DOOR FORCE ADJUSTMENT
TO COMPENSATE FOR A BINDING OR STICKING
GARAGE DOOR. PERFORM THE SAFETY REVERSAL
SYSTEM TEST (STEPS 4-6) MONTHLY!

� NOTE: Read the following directions carefully before

setting the door force adjustments.

ADJUSTING THE CLOSE FORCE

UNDER-SETTING THE CLOSE FORCE

SETTING THE CLOSE FORCE

WARNING

Always perform the Door Force Safety System Test
after making any adjustments to the operator.

Door Force Safety System Test

1 Start with the door open. Use the remote control to

cycle the door during these tests.

Adjusting the Close Force

2 Turn the CLOSE FORCE adjustment 1/8-turn at a time

in the DECREASE direction (counterclockwise) until the
door stops and reverses mid travel while going down.

3 Turn the CLOSE FORCE adjustment 1/8-turn at a time

in the INCREASE direction (clockwise) until the door
fully closes without reversing.

Safety Reversal System Test

4 Lay a 2 x 4 board flat on the floor where it will be struck

by the center of the door as it closes.

5 Verify that the door reverses when it strikes the board.

The door must reverse within two seconds after
striking the board.

� NOTE: If the door stops after encountering the board

and does not reverse, the CLOSE FORCE needs to be
DECREASED.

6 Repeat the Safety Reversal System Test until the door

reverses within two seconds of striking the board.

Adjusting the Open Force

7 Turn the OPEN FORCE adjustment 1/8-turn at a time

in the DECREASE direction (counterclockwise) until
the door stops mid travel while going up.

8 Turn the OPEN FORCE adjustment 1/8-turn at a time

in the INCREASE direction (clockwise) until the door
fully opens without stopping.

TESTING THE SAFETY REVERSAL SYSTEM

UNDER-SETTING THE OPEN FORCE SETTING THE OPEN FORCE

DECREASE

DECREASE OPEN FORCE
ADJUSTMENT UNTIL THE
DOOR STOPS MIDWAY
WHILE GOING UP

OPEN FORCE

DOWN

SET THE OPEN LIMIT SO THE DOOR
STOPS JUST SHORT OF LEVEL

2 x 4 BOARD LAID FLAT
UNDER

UP

EXAMINE THE SPOT WHERE
THE DOOR STOPS OPENING

USE A SCREWDRIVER
TO ADJUST THE LIMIT

EXAMINE THE SPOT WHERE
DOOR STOPS CLOSING

USE A SCREWDRIVER
TO ADJUST THE LIMIT

ADJUSTING THE OPEN FORCE

DECREASE CLOSE FORCE
ADJUSTMENT UNTIL THE
DOOR REVERSES MIDWAY
WHILE GOING DOWN

DECREASE

CLOSE FORCE

INCREASE CLOSE FORCE
ADJUSTMENT UNTIL THE
DOOR CLOSES FULLY
WITHOUT REVERSING

INCREASE

CLOSE FORCE

TEST WITH SMALL OBSTACLE

THE DOOR MUST REVERSE
WITHIN 2-SECONDS AFTER
IMPACT WITH A 2 x 4 BOARD

CENTER OF DOOR

INCREASE

INCREASE OPEN FORCE
ADJUSTMENT UNTIL THE
DOOR OPENS FULLY
WITHOUT STOPPING

OPEN FORCE

15 Using the Garage Door Operator

IMPORTANT USER SAFETY INSTRUCTIONS

WARNING

A MOVING GARAGE DOOR CAN CAUSE INJURY OR DEATH!

TO REDUCE THE RISK OF DEATH OR SEVERE INJURY:

1 READ AND FOLLOW ALL INSTALLATION INSTRUCTIONS.

2 NEVER LET CHILDREN OPERATE, OR PLAY WITH DOOR CONTROLS! KEEP REMOTE CONTROL

AWAY FROM CHILDREN!

3 Always keep moving door in sight and away from people and objects until it is completely closed.

NO ONE SHOULD CROSS THE PATH OF THE MOVING DOOR.

4 NEVER GO UNDER A STOPPED, PARTIALLY OPEN DOOR.

5 Test door operator monthly. The garage door MUST reverse on contact with a 1-1/2 inch object (or a 2x4

board laid flat at the center of the door) on the floor. If adjusting either the force or the limit of travel,

re-test the door operator. Failure to adjust the operator properly may cause severe injury or death.

6 If possible, use the red emergency release handle only when the door is closed. Use caution when

using this release with the door open. Weak or broken springs may cause the door to fall rapidly,

causing injury or death.

7 KEEP GARAGE DOORS PROPERLY BALANCED. (See Garage Door Operator Maintenance) An

improperly balanced door could cause severe injury or death. Have a qualified service person make

repairs to cables, spring assembly and other hardware.

8

SAVE THESE INSTRUCTIONS.

Opening the Door

1 With the door in view, press the wall station’s UP/

DOWN ARROW button or the button assigned to the
operator on the remote control, or enter a valid access
code and press START/STOP on a remote keypad.

2 When the operator is activated, the operator’s light will

turn on and the door will begin to open.

3 The door will open until the open limit is reached. If an

obstacle is encountered (operator’s light flashes four
times) while the door is opening, the door will stop.

4 The operator’s light will stay on for about five minutes

after the door stops.

Closing the Door

1 With the door in view, press the wall station’s UP/

DOWN ARROW button or the button assigned to the
operator on the remote control, or enter a valid access
code and press START/STOP on a remote keypad.

2 When the operator is activated, the operator’s light will

turn on and the door will begin to close.

3 The door will close until the close limit is reached. If an

obstacle is encountered (operator’s light flashes four
times), or the safety beam is interrupted (operator’s
light flashes three times) during closing, the door will
stop, then re-open.

4 The operator’s light will stay on for about five minutes

after the door stops.

Stopping the Door Mid-travel

1 The door can be stopped immediately at any time

by pressing the wall station’s UP/DOWN ARROW
button, the remote control’s pushbutton, or press
the START/STOP button on a remote keypad.

2 The next time the operator is activated, the door will

move in the opposite direction.

Vacation Lock for Additional Security

1 Slide the wall station’s LOCK switch to the locked

position to prevent remote controls from opening the
door after the door is completely closed. The remotes
can close the door, but not open it. The door can
still be opened or closed by using the wall station’s
UP/DOWN ARROW pushbutton.

� NOTE: To signal that the vacation switch is locked,

the operator’s light will flash five times if a remote is
activated in an attempt to open the door.

2 Slide the wall station’s LOCK switch to the unlocked

position to return the operator to normal operation.

Controlling the Operator’s Light

1 The operator’s light can be lit by pushing the wall

station’s LIGHT button. The light will remain on until
the LIGHT button is pressed again or the operator is
cycled.

2 If the operator’s light is on, pushing the wall station’s

LIGHT button will turn the operator’s light off.

Disconnecting the Door from the Operator

1 With the door in any position (preferably closed),

carefully pull the red release handle. USE CAUTION

IF THE DOOR IS OPEN, THE DOOR MAY DROP.

2 The disconnected door can be opened or closed

manually.

3 To re-connect the operator, flip the release lever up.

Raise or lower the door manually until the operator
reconnects.

OPENING OR CLOSING THE DOOR

WALL STATION REMOTE CONTROL

PRESS THE

WALL STATION'S

UP/DOWN ARROW

SAFETY LIGHTING

WHENEVER OPERATING
THE LIGHT WILL TURN ON
FOR ABOUT 5 MINUTES

STOPPING THE DOOR

PREVENTING REMOTES
FROM OPENING THE DOOR

LOCK UNLOCK

CONTROLLING THE
OPERATOR'S LIGHT

PRESS THE LIGHT
BUTTON TO TURN THE
LIGHT ON OR OFF

IN CASE OF POWER FAILURE
OR IF DOOR BECOMES OBSTRUCTED

PULL THE RED
RELEASE HANDLE
TO DISCONNECT
THE OPERATOR
FROM THE
DOOR

PRESS A REMOTE

- OR -

CONTROL BUTTON

THE DOOR CAN BE STOPPED
AT ANY POSITION USING THE

WALL STATION, REMOTE CONTROL,

SLIDE THE VACATION SWITCH

DOWN TO LOCK (REMOTES DISABLED)

OR UP TO UNLOCK (REMOTES NORMAL)

THE LIGHT WILL STAY ON UNTIL
THE LIGHT BUTTON IS PRESSED
OR THE OPERATOR IS CYCLED

FLIP THE LEVER UP
AND RAISE OR

NOTICE

IF DOOR BECOMES OBSTRUCTED,

PULL DOWN ON HANDLE

LOWER THE DOOR
TO RECONNECT
THE OPERATOR

ENTER AN

ACCESS CODE

AND PRESS

- OR -

START/STOP

NOTE: A FLASHING

LIGHT INDICATES

TROUBLE

WALL
STATION

REMOTE
CONTROL

OR A REMOTE KEYPAD

NOTICE

IF DOOR BECOMES OBSTRUCTED,

PULL DOWN ON HANDLE

REMOTE
KEYPAD

REMOTE
KEYPAD

16 Garage Door Operator Maintenance

Weather conditions may affect the door operation which could require some re-setting of the operator’s adjustments.
Doors may swell and become heavier during wet periods, door hinges and rollers might bind during cold periods. To
insure safe operation of the door, perform the following tests, including any additional test steps described.

Every Month

1 With the door closed, pull the red release handle to

disconnect the operator from the door.

2 From outside the garage, slowly open the door

manually all the 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.

3 Raise the garage door about halfway up. Carefully

release the door and see if the door balances. It should

Garage door hardware (springs, cables,
brackets, pulleys, etc.) are under extreme
pressure and tension. DO NOT ATTEMPT TO
LOOSEN, TIGHTEN OR ADJUST ANY DOOR
HARDWARE. CALL A QUALIFIED GARAGE DOOR
INSTALLATION PROFESSIONAL!

WARNING

stay in place. Close the door.

� NOTE: If the garage door is unbalanced or the

door travel isn’t smooth, have a qualified garage door
professional adjust or repair the door.

4 To reconnect the operator, flip the release lever

up. Raise the door manually until the operator
reconnects.

5 Perform the Safety Beam Test (Section 11).

6 Perform the Safety Reversal System Test as described

in Steps 4-6 in Section 14.

The garage door operator must not be
installed and used on an unbalanced door. The
operator’s internal door force sensor will not
function properly on an unbalanced door. Risk
of serious injury or death may result.

TO DISCONNECT OPERATOR

WARNING

TO RECONNECT OPERATOR

After Servicing the Operator

1 Perform the Safety Beam Test (Section 11).

2 Perform the Open and Close Limit Adjustments

(Section 13).

3 Perform the entire Door Force Safety System Test

(Section 14).

Every 6 Months

Check the belt or chain tension.

PULL THE RED
RELEASE HANDLE
TO DISCONNECT
THE OPERATOR
FROM THE
DOOR

IF DOOR BECOMES OBSTRUCTED,

NOTICE

PULL DOWN ON HANDLE

FLIP THE LEVER UP
AND RAISE OR
LOWER THE DOOR
TO RECONNECT
THE OPERATOR

NOTICE

IF DOOR BECOMES OBSTRUCTED,

PULL DOWN ON HANDLE

• For belt-drive rails, examine the length of the tension
spring in the traveler. It should be about 1” long.

• For chain-drive rails, examine the spacing between
the turnbuckle and the rail. The turnbuckle should be
slightly above the rail.

� NOTE: Too much or too little chain tension will cause

Always perform the entire Door Force Safety
System Test (see Section 14) after making any
adjustments to the operator.

WARNING

excessive sprocket noise.

Chain Adjustment

If necessary, use the following steps to adjust the chain.
1 Hold the turnbuckle with a flat blade screwdriver and

loosen the two locknuts with a 7/16” end wrench.

2 Twist the turnbuckle to adjust the chain tension. Adjust

the chain until the turnbuckle is sightly above the rail.

ADJUSTING A CHAIN-DRIVE

TURNBUCKLE
LOCKNUTS

LOCKNUTS

LOOSEN

CHAIN

TIGHTEN

TWIST

TURNBUCKLE

CHAIN

LOOSEN

3 Hold the turnbuckle with a flat blade screwdriver and

tighten the two locknuts with a 7/16” end wrench.

Belt Adjustment

The tension spring in the traveler keeps the belt taut. The

TO HEAD

LOCKNUTS

TIGHTEN

HOLD TURNBUCKLE
WITH FLAT BLADE
SCREWDRIVER TO
BACKUP LOCKNUTS

factory setting for the tension spring length is .9” long. If
the tension spring is longer than 1”, adjust the belt.
1 Hold the traveler so the adjustment wheel is visible

through the large slot.

ADJUSTING A BELT-DRIVE

TRAVELER

ADJUSTMENT WHEEL

MEASURE THE TENSION
SPRING LENGTH

2 Use a flat blade screwdriver to turn the adjustment

wheel to compress the tension spring until its length is
between .9” and 1” long.

Every Year

Check the door hardware for lubrication needs. Lubricate
door hinges, rollers and bearings according to door
manufacturer’s recommended procedures.

TURN THE ADJUSTMENT
WHEEL UNTIL THE TENSION
SPRING IS ABOUT 1" LONG

LOOSEN

TIGHTEN

17 Troubleshooting

LAMP FLASHES

TROUBLE CODE

1 FLASH No problem

2 FLASHES Door won’t close Shorted wall station wires

3 FLASHES Door won’t close Safety beam obstacle

4 FLASHES

5 FLASHES

6 FLASHES

FCC NOTICE

Changes or modifications not expressly described in this manual or approved by the manufacturer could void the user’s authority to operate
the equipment.

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment
generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reor ient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

LIMITED WARRANTY

This Linear product is warranted to the original consumer against defects in material and workmanship for:

MODEL ELECTRONICS MECHANICAL MOTOR BELT
LDO50 1 year 5 years Lifetime Lifetime
LDO33 1 year 5 years 10 years Lifetime

This product is warranted to the original consumer against defects in material and workmanship for the periods mentioned above. Linear will
repair, or at its option, replace, any device that it finds requires service under this warranty, and will return the repaired or replaced device
to the consumer at Linear’s cost. Devices must be sent to Linear for service at owner’s expense. This warranty does not apply to damage to
the product from negligence, abuse, abnormal usage, misuse, accidents, normal wear or tear or due to failure to follow Seller’s instructions,
or arising from improper installation, storage or maintenance. In no event will Linear be responsible for incidental, compensatory, punitive,
consequential, indirect, special or other damages. The remedies provided by this warranty are exclusive. Some states do not allow the
exclusion or limitation of incidental and consequential damages, so the above limitation or exclusion may not apply to you. Any warranties
implied by law are limited to the time periods set forth above. Some states do not allow limitations on how long an implied warranty lasts,
so the above limitation may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary
from state to state.

For warranty service and shipping instructions contact Linear at the phone number shown below. In order to be protected by this warranty, save
your proof of purchase and send a copy with equipment should repair be required. All products returned for warranty service require a Return
Product Authorization Number (RPA#). Contact Linear Technical Services at 1-800-421-1587 for an RPA# and other important details.

Copyright © 2010 Linear LLC 223709 C

PROBLEM CAUSE REMEDY

Remote control entered into
memory

Add any additional remote controls
(MegaCode™ type only)

Check wall station wires. Be sure both are
connected to the terminal screws. Check for
a staple in the wall station wires. Remove
any staples compressing the wire.

Check for obstacles. Align the safety beam
(Section 11)

Door reverses
or won’t open or
close

Door won’t open
from transmitter

Motor ran longer
than 30 seconds

Open or Close force exceeded,
or motor thermal shutdown

Remote was activated while
vacation switch was locked

Mechanical or electronic failure Call Technical Services Group for assistance

Check for binding or un-balanced door.
Adjust the door force (Section 14). If motor
had thermal shutdown, wait 30 minutes and
retry.

Unlock vacation switch on wall station