Chamberlain 3255-2M 1/2 HP, 3245M 1/3 HP MULTI-FUNCTION Door Control, Light feature, Lock feature

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LOCKOUT POSITION
NOTICE
Emergency Release Handle (Down and Back)
Trolley
Release Arm
The lockout feature prevents the trolley from reconnecting automatically. Pull the emergency release handle down and back (toward the opener). The door can then be raised and lowered manually as often as necessary. To disengage the lockout feature,
pull the handle straight down. The trolley will reconnect on the next
UP or DOWN operation, either manually or by using the door control or remote.
MANUAL DISCONNECT
POSITION
Trolley Release Arm
Push
Button
Lock
Button

Using the Wall-Mounted

To Open the Door Manually

Door Control

 

THE MULTI-FUNCTION DOOR CONTROL

Press the push button to open or close the door. Press again to reverse the door during the closing cycle or to stop the door while it's opening.

Light feature

LOCK

Light

LIGHT

Press the Light button to turn the opener

 

Button

 

 

light on or off. It will not control the opener lights when the door is in motion. If you turn it on and then activate the opener, the light will remain on for 4-1/2 minutes. Press again to turn it off sooner. The 4-1/2 minute interval can be changed to 1-1/2, 2-1/2, or 3-1/2 minutes as follows: Press and hold the Lock button until the light blinks (about

To prevent possible SERIOUS INJURY or DEATH from a falling garage door:

•If possible, use emergency release handle to disengage trolley ONLY when garage door is CLOSED. Weak or broken springs or unbalanced door could result in an open door falling rapidly and/or unexpectedly.

•NEVER use emergency release handle unless garage doorway is clear of persons and obstructions.

•NEVER use handle to pull door open or closed. If rope knot becomes untied, you could fall.

10 seconds). A single blink indicates that the timer is reset to 1-1/2 minutes. Repeat the procedure and the light will blink twice, resetting the timer to 2-1/2 minutes. Repeat again for a 3-1/2 minute interval, etc., up to a maximum of four blinks and 4-1/2 minutes.

Lock feature

Designed to prevent operation of the door from hand-held remote controls. However, the door will open and close from the Door Control, the Outside Keylock and the Keyless Entry Accessories.

To activate, press and hold the Lock button for 2 seconds. The push bar light will flash as long as the Lock feature is on.

To turn off, press and hold the Lock button again for

2 seconds. The push bar light will stop flashing. The Lock feature will also turn off whenever the “learn” button on the motor unit panel is activated.

The door should be fully closed if possible. Pull down on the emergency release handle and lift the door manually. To reconnect the door to the opener, press the door control push bar.

Emergency

Release

Handle

(Pull Down)

NOTICE

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Contents For Residential Use Only Garage Door OpenerIntroduction Table of ContentsOne-Piece Door Preparing your garage doorTools needed Sectional DoorONE-PIECE Door with Track Sectional Door InstallationPlanning ONE-PIECE Door Without TrackCarton Inventory Installation HardwareAssembly Step Attach the Rail to the Motor UnitBolt previously removed from motor unit Tighten the Chain InstallationDetermine the Header Bracket Location Installation StepInstall the Header Bracket Wall Header Bracket InstallationCeiling Header Bracket Installation Attach the Rail to the Header Bracket Sectional Door or ONE-PIECE Door with Track Position the OpenerHang the Opener Standard installation only Run bell wire up wall Install the Door ControlAttach the Emergency Release Rope and Handle Install the LightElectrical Requirements Install The Protector System Important Information about Safety Reversing SensorFacing the door from inside the garage Floor installation Figure Installing the BracketsGarage door track installation preferred Wall installationMounting and Wiring the Safety Reversing Sensors Troubleshooting the Safety ReversingAligning the Safety Reversing Sensors Wood Doors Metal, insulated or light weight factory reinforced doorsFasten the Door Bracket Sectional DoorsONE-PIECE Doors Sectional Doors only Connect Door Arm to TrolleyConnect the door arm to the trolley Adjustment procedures, FigureALL ONE-PIECE Doors Assemble the door arm, FigureIf the door does not close completely Adjustment StepAdjust the UP and Down Travel Limits If door does not open at least 5 feet 1.5 mTest the UP open force Adjust the ForceHOW and When to Adjust the Forces Test the Down close forceTest The Protector System Test the Safety Reversal SystemAdjust Important Safety CheckUsing Your Garage Door Opener OperationActivate your opener with any of the following Light feature Lock featureMULTI-FUNCTION Door Control Once a Year Care of Your OpenerOnce a Month Twice a YearHaving a PROBLEM? Symptom Motor unit doesn’t operate Safety reversing sensors wire open broken or disconnectedDoor control or wire shorted Symptom LED is not lit on door controlTo Erase All Codes From Motor Unit Memory To Add or Reprogram a Hand-held Remote ControlUsing the Learn Button Using the Door Control ProgrammingTo Add, Reprogram or Change a Keyless Entry PIN To change an existing, known PINTo set a temporary PIN Repair Parts Rail Assembly PartsInstallation Parts Motor Unit Assembly Parts Complete with Spring washerComplete with Logic board Accessories Liftmaster Service is On Call

3255M 1/2 HP, 3245M 1/3 HP, 3255-2M 1/2 HP specifications

The Chamberlain 3255-2M, 3245M, and 3255M garage door openers stand out in the market for their reliability and superior performance. Each model offers a unique combination of power and features, catering to different needs and preferences.

The Chamberlain 3255-2M is a robust 1/2 HP opener designed for heavy residential garage doors. Its powerful motor ensures smooth and efficient operation, making it ideal for doors weighing up to 7 feet high. This model incorporates the latest in opening technology, including a durable chain drive mechanism that provides strength and longevity. One of its significant features is the incorporated MyQ technology, enabling users to control their garage door remotely through a smartphone app. This innovative feature brings convenience and peace of mind, as homeowners can check the status of the door from anywhere.

Another excellent choice is the Chamberlain 3245M, a 1/3 HP model that offers a balance of performance and affordability. It is suitable for lighter doors, providing consistent and reliable opening and closing. The 3245M model also boasts a protective cover that enhances its durability against the elements. It operates quietly thanks to its direct drive system, making it an excellent option for garages attached to living spaces. Like the 3255-2M, this model is also equipped with MyQ technology, allowing users to monitor and control their garage door from their smartphones seamlessly.

Finally, the Chamberlain 3255M, another 1/2 HP opener, offers similar features to the 3255-2M but with a focus on belt drive technology. This model is built for quieter performance, making it ideal for homes where noise is a concern. The belt drive reduces vibrations and sound, ensuring a smoother user experience. This model also comes with a battery backup system, which provides added security during power outages.

All these models emphasize safety and security, featuring auto-reverse functionality that senses obstacles and prevents the door from closing on them. The Chamberlain garage door openers are also equipped with a rolling code technology that changes the access code each time the remote is used, enhancing security against unauthorized access.

In summary, the Chamberlain 3255-2M, 3245M, and 3255M garage door openers cater to a variety of needs with their powerful motors, innovative technologies, and user-friendly features. Their reliability and performance make them an excellent investment for any homeowner.
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