Chamberlain 3255-2M 1/2 HP Install the Header Bracket, Wall Header Bracket Installation

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INSTALLATION STEP 2

Install the Header Bracket

You can attach the header bracket either to the wall above the garage door, or to the ceiling. Follow the instructions which will work best for your particular requirements. DO NOT install the header bracket over drywall. If installing into masonry, use concrete anchors (not provided).

WALL HEADER BRACKET INSTALLATION

•Center the bracket on the vertical centerline with the bottom edge of the bracket on the horizontal line as shown (with the arrow pointing toward the ceiling).

•Mark the vertical set of bracket holes (do not use the holes designated for ceiling mount). Drill 3/16" pilot holes and fasten the bracket securely to a structural support with the hardware provided.

HARDWARE SHOWN ACTUAL SIZE

Lag Screw 5/16"-9x1-5/8"

Wall Mounting Holes

CEILING MOUNT ONLY

UP

Optional

Wall Mounting Holes

Header Wall

2x4Header

StructuralBracket

Support

Horizontal

Line

Highest Point of

Garage Door Travel

The nail hole is for positioning only. You must use lag screws to mount the header bracket.

Vertical

Centerline of

Garage Door

Lag Screws 5/16"-9x1-5/8"

Door Spring

Garage Door

Vertical

Centerline of

Garage Door

CEILING HEADER BRACKET INSTALLATION

•Extend the vertical centerline onto the ceiling as shown.

•Center the bracket on the vertical mark, no more than 6" (15 cm) from the wall. Make sure the arrow is pointing toward the wall. The bracket can be mounted flush against the ceiling when clearance is minimal.

•Mark the side holes. Drill 3/16" pilot holes and fasten bracket securely to a structural support with the hardware provided.

– Finished Ceiling –

 

 

Vertical

Header

Centerline of

Garage Door

Bracket

 

 

 

 

 

 

 

 

 

 

 

 

6" (15 cm) Maximum

Door

Spring

Lag Screws 5/16"-9x1-5/8"

The nail hole is for positioning only. You must use lag screws to mount the header bracket.

Ceiling Mounting Holes

CEILING MOUNT ONLY

UP

Garage Door

– Header Wall –

Vertical

Centerline of

Garage Door

9

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Contents For Residential Use Only Garage Door OpenerIntroduction Table of ContentsTools needed Preparing your garage doorSectional Door One-Piece DoorPlanning Sectional Door InstallationONE-PIECE Door Without Track ONE-PIECE Door with 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 Garage door track installation preferred Installing the BracketsWall installation Floor installation FigureMounting and Wiring the Safety Reversing Sensors Troubleshooting the Safety ReversingAligning the Safety Reversing Sensors Fasten the Door Bracket Metal, insulated or light weight factory reinforced doorsSectional Doors Wood DoorsONE-PIECE Doors Sectional Doors only Connect Door Arm to TrolleyALL ONE-PIECE Doors Adjustment procedures, FigureAssemble the door arm, Figure Connect the door arm to the trolleyAdjust the UP and Down Travel Limits Adjustment StepIf door does not open at least 5 feet 1.5 m If the door does not close completelyHOW and When to Adjust the Forces Adjust the ForceTest the Down close force Test the UP open forceAdjust Test the Safety Reversal SystemImportant Safety Check Test The Protector SystemUsing Your Garage Door Opener OperationActivate your opener with any of the following Light feature Lock featureMULTI-FUNCTION Door Control Once a Month Care of Your OpenerTwice a Year Once a YearHaving a PROBLEM? Door control or wire shorted Safety reversing sensors wire open broken or disconnectedSymptom LED is not lit on door control Symptom Motor unit doesn’t operateUsing the Learn Button Using the Door Control To Add or Reprogram a Hand-held Remote ControlProgramming To Erase All Codes From Motor Unit MemoryTo 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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