Chamberlain 3255M 1/2 HP, 3255-2M 1/2 HP, 3245M 1/3 HP Carton Inventory, Installation Hardware

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Carton Inventory

Your garage door opener is packaged in two cartons which contain the motor unit and all parts illustrated below. Accessories will depend on the model purchased.

If anything is missing, carefully check the packing material. Parts may be stuck in the foam. Hardware for installation is also listed below.

Models 3245M, 3255M (1)

Model 3255-2M (2)

LOCK

 

Remote Control

LIGHT

 

Multi-Function

SECURITY®

Visor Clip

Single-Button Remote Control

 

Door Control Panel

 

 

Chain

Sprocket Cover

Styrofoam

Motor Unit with Light Lens

ONLY

GMOUNT

CEILIN

UP

Header Bracket

Chain

Pulley Bracket

Safety Sensor

Bracket (2)

2 Conductor Bell Wire

White & White/Red

One-Piece

Rail

Trolley

Door Bracket

The Protector System®

(2) Safety Reversing Sensors

(1 Sending Eye and 1 Receiving Eye) with 2-Conductor White & White/Black Bell Wire attached

Curved Door

Arm Section

Safety Labels

 

and

Straight Door

Literature

 

Arm Section

 

 

INSTALLATION HARDWARE

 

Hex Bolt 5/16"-18x7/8" (4)

Insulated Staples (30)

Lag Screw 5/16"-9x1-5/8" (2)

Ring Fastener (3)

Lag Screw 5/16"-18x1-7/8" (2)

Drywall Anchors (2)

Clevis Pin 5/16"x2-3/4" (1)

Rail Grease

Clevis Pin 5/16"x1-1/4" (1)

Carriage Bolt 1/4"-20x1/2" (2)

Clevis Pin 5/16"x1" (1)

Wing Nut 1/4"-20 (2)

Nut 5/16"-18 (4)

Rope

Lock Washer 5/16" (4)

Handle

Screw 6ABx1-1/4" (2)

 

Screw 6-32x1" (2)

 

Self-Threading Screw 1/4"-14x5/8" (2)

 

 

 

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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 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 Garage door track installation preferred Installing the BracketsWall installation Floor installation FigureAligning the Safety Reversing Sensors Mounting and Wiring the Safety Reversing SensorsTroubleshooting the Safety Reversing 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 SystemActivate your opener with any of the following Using Your Garage Door OpenerOperation MULTI-FUNCTION Door Control Light featureLock feature 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 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.