2 Remote Controls
This opener 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.
To Add or Remove a Remote Control
1 Press the opener’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 opener’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 opener’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
opener’s white antenna wire so it points up.
2 Stand clear of the door, press the remote control’s
button and verify that the opener starts.
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.
3 Garage Door Opener Maintenance
Weather conditions may affect the door operation
which could require some re-setting of the opener’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 opener 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 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 opener, flip the release lever up.
Raise the door manually until the opener reconnects.
5 Perform the Safety Beam Test (Section 4).
6 Perform the Safety Reversal System Test as described
in Steps 4-6 in Section 6.
After Servicing the Opener
1 Perform the Safety Beam Test (Section 4).
2 Perform the Open and Close Limit Adjustments
(Section 5).
3 Perform the entire Door Force Safety System Test
(Section 6).
Every 6 Months
Check the belt or chain tension.
• 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
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.
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
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.
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.
MODELS LDO33 & LDO50
BELT-DRIVE OR CHAIN-DRIVE
GARAGE DOOR OPENERS
HOMEOWNER’S INSTRUCTIONS
For Sectional and Jamb Type Doors
IMPORTANT SAFETY NOTES
Please read the instructions carefully! This garage door opener 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 opener.
THE FOLLOWING FORMATS ARE USED FOR SAFETY NOTES IN THESE INSTRUCTIONS.
1 Using the Garage Door Opener
Opening the Door
1 With the door in view, press the wall station’s UP/
DOWN ARROW button, the button assigned to the
opener on the remote control, or enter a valid access
code and press START/STOP on a remote keypad.
2 When the opener is activated, the opener’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 (opener’s light flashes four
times) while the door is opening, the door will stop.
4 The opener’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
opener on the remote control, or enter a valid access
code and press START/STOP on a remote keypad.
2 When the opener is activated, the opener’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 (opener’s light flashes four
times), or the safety beam is interrupted (opener’s light
flashes three times) during closing, the door will stop,
then re-open.
4 The opener’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 opener 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 opener’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 opener to normal operation.
Controlling the Opener’s Light
1 The opener’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 opener is
cycled.
2 If the opener’s light is on, pushing the wall station’s
LIGHT button will turn the opener’s light off.
Disconnecting the Door from the Opener
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 reconnect the opener, flip the release lever up.
Raise or lower the door manually until the opener
reconnects.
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 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 opener 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 opener. Failure to adjust the opener 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 Opener 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.
THE DOOR SHOULD
BALANCE WITHOUT
GOING UP OR DOWN
CHECKING THE DOOR BALANCE
TEST WITH SMALL OBSTACLE
THE DOOR MUST REVERSE
WITHIN 2-SECONDS AFTER
IMPACT WITH A 2 x 4 BOARD
2 x 4 BOARD LAID FLAT
UNDER
CENTER OF DOOR
TESTING THE SAFETY REVERSAL SYSTEM
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