Chamberlain 3255M 1/2 HP Position the Opener, Sectional Door or ONE-PIECE Door with Track

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INSTALLATION STEP 4

Position the Opener

Follow instructions which apply to your door type as illustrated.

SECTIONAL DOOR OR ONE-PIECE DOOR WITH TRACK

A 2x4 laid flat is convenient for setting an ideal door-to-rail distance.

•Remove foam packaging.

•Raise the opener onto a stepladder. You will need help at this point if the ladder is not tall enough.

•Open the door all the way and place a 2x4 laid flat on the top section beneath the rail.

•If the top section or panel hits the trolley when you raise the door, pull down on the trolley release arm to disconnect inner and outer sections. Slide the outer trolley toward the motor unit. The trolley can remain disconnected until Installation Step 12 is completed.

 

Trolley

ENGAGED

Release Arm

RELEASED

To prevent damage to garage door, rest garage door opener rail on 2x4 placed on top section of door.

Rail

2x4 is used to determine

Doorthe correct mounting height from ceiling.

ONE-PIECE DOOR WITHOUT TRACK

A 2x4 on its side is convenient for setting an ideal door-to-rail distance.

•Remove foam packaging.

•Raise the opener onto a stepladder. You will need help at this point if the ladder is not tall enough.

•Open the door all the way and place a 2x4 on its side on the top section of the door beneath the rail.

•The top of the door should be level with the top of the motor unit. Do not position the opener more than 4" (10 cm) above this point.

11

Header

Bracket

Top of Door

2x4 is used to determine the correct mounting height from ceiling.

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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 HardwareBolt previously removed from motor unit Assembly StepAttach the Rail to the Motor Unit Tighten the Chain InstallationDetermine the Header Bracket Location Installation StepCeiling Header Bracket Installation Install the Header BracketWall 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 Facing the door from inside the garage Install The Protector SystemImportant Information about Safety Reversing Sensor Floor installation Figure Installing the BracketsGarage door track installation preferred Wall installationAligning the Safety Reversing Sensors Mounting and Wiring the Safety Reversing SensorsTroubleshooting the Safety Reversing 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 CheckActivate your opener with any of the following Using Your Garage Door OpenerOperation MULTI-FUNCTION Door Control Light featureLock feature 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 set a temporary PIN To Add, Reprogram or Change a Keyless Entry PINTo change an existing, known PIN Installation Parts Repair PartsRail Assembly Parts Complete with Logic board Motor Unit Assembly PartsComplete with Spring washer 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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