Chamberlain 3245M 1/3 HP Planning, Sectional Door Installation, ONE-PIECE Door Without Track

Page 4

Planning

Identify the type and height of your garage door. Survey your garage area to see if any of the conditions below apply to your installation. Additional materials may be

required. You may find it helpful to refer back to this page and the accompanying illustrations as you proceed with the installation of your opener.

SECTIONAL DOOR INSTALLATION

Horizontal and vertical reinforcement is needed for lightweight garage doors (fiberglass, steel, aluminum,

door with glass panels, etc.). See page 19 for details.

Header Wall

FINISHED CEILING

Support bracket & fastening hardware is required.

See page 12.

Slack in chain tension is normal when garage door is closed.

Motor Unit

 

 

Extension Spring

 

 

OR

— —

 

Torsion Spring

Vertical Centerline

 

—

of Garage Door

Access Door

 

— — —

 

Safety

 

 

 

 

Reversing

— —

 

Sensor

 

 

Gap between floor and bottom of door

must not exceed 1/4" (6 mm).

Safety Reversing Sensor

Wall- mounted Door Control

ONE-PIECE DOOR WITHOUT TRACK

Slack in chain tension is normal when garage door is closed.

Header

Wall

Wall-mounted

Door Control

FINISHED CEILING

 

Support bracket

 

& fastening

 

hardware is required.

 

See page 12.

Motor Unit

 

ONE-PIECE DOOR WITH TRACK

Slack in chain tension is normal when garage door is closed.

Access

Door

Safety

Reversing Sensor

 

Gap between floor and bottom of

Safety

door must not exceed 1/4" (6 mm).

Reversing Sensor

Safety

Reversing

Sensor

Gap between floor and bottom of door must not exceed 1/4" (6 mm).

Access

Door

Safety

Reversing

Sensor

4

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Contents Garage Door Opener For Residential Use OnlyTable of Contents IntroductionPreparing your garage door Tools neededSectional Door One-Piece DoorSectional Door Installation PlanningONE-PIECE Door Without Track ONE-PIECE Door with TrackInstallation Hardware Carton InventoryAttach the Rail to the Motor Unit Assembly StepBolt previously removed from motor unit Installation Tighten the ChainInstallation Step Determine the Header Bracket LocationWall Header Bracket Installation Install the Header BracketCeiling Header Bracket Installation Attach the Rail to the Header Bracket Position the Opener Sectional Door or ONE-PIECE Door with TrackHang the Opener Install the Door Control Standard installation only Run bell wire up wallInstall the Light Attach the Emergency Release Rope and HandleElectrical Requirements Important Information about Safety Reversing Sensor Install The Protector SystemFacing the door from inside the garage Installing the Brackets Garage door track installation preferredWall installation Floor installation FigureTroubleshooting the Safety Reversing Mounting and Wiring the Safety Reversing SensorsAligning the Safety Reversing Sensors Metal, insulated or light weight factory reinforced doors Fasten the Door BracketSectional Doors Wood DoorsONE-PIECE Doors Connect Door Arm to Trolley Sectional Doors onlyAdjustment procedures, Figure ALL ONE-PIECE DoorsAssemble the door arm, Figure Connect the door arm to the trolleyAdjustment Step Adjust the UP and Down Travel LimitsIf door does not open at least 5 feet 1.5 m If the door does not close completelyAdjust the Force HOW and When to Adjust the ForcesTest the Down close force Test the UP open forceTest the Safety Reversal System AdjustImportant Safety Check Test The Protector SystemOperation Using Your Garage Door OpenerActivate your opener with any of the following Lock feature Light featureMULTI-FUNCTION Door Control Care of Your Opener Once a MonthTwice a Year Once a YearHaving a PROBLEM? Safety reversing sensors wire open broken or disconnected Door control or wire shortedSymptom LED is not lit on door control Symptom Motor unit doesn’t operateTo Add or Reprogram a Hand-held Remote Control Using the Learn Button Using the Door ControlProgramming To Erase All Codes From Motor Unit MemoryTo change an existing, known PIN To Add, Reprogram or Change a Keyless Entry PINTo set a temporary PIN Rail Assembly Parts Repair PartsInstallation Parts Complete with Spring washer Motor Unit Assembly PartsComplete 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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