Chamberlain 3255M 1/2 HP, 3255-2M 1/2 HP, 3245M 1/3 HP Operation, Using Your Garage Door Opener

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OPERATION

IMPORTANT SAFETY INSTRUCTIONS

WARNING

To reduce the risk of SEVERE INJURY or DEATH:

1.READ AND FOLLOW ALL WARNINGS AND INSTRUCTIONS.

2.ALWAYS keep remote controls out of reach of children. NEVER permit children to operate or play with garage door control push buttons or remote controls.

3.ONLY activate garage door when it can be seen clearly, it is properly adjusted, and there are no obstructions to door travel.

4.ALWAYS keep garage door in sight until completely closed.

NO ONE SHOULD CROSS THE PATH OF THE MOVING DOOR.

5.NO ONE SHOULD GO UNDER A STOPPED, PARTIALLY OPEN DOOR.

6.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, causing SEVERE INJURY or DEATH.

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

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

9.If one control (force or travel limits) is adjusted, the other control may also need adjustment.

10.After ANY adjustments are made, the safety reversal system MUST be tested.

11.Safety reversal system MUST be tested every month. Garage door MUST reverse on contact with 1-1/2" (3.8 cm) high object (or a 2x4 laid flat) on the floor. Failure to adjust the garage door opener properly may cause SEVERE INJURY or

DEATH.

12.ALWAYS KEEP GARAGE DOOR PROPERLY BALANCED (see page 3). An improperly balanced door may NOT reverse when required and could result in SEVERE INJURY or

DEATH.

13.ALL repairs to cables, spring assemblies and other hardware, ALL of which are under EXTREME tension, MUST be made by a trained door systems technician.

14.ALWAYS disconnect electric power to garage door opener BEFORE making ANY repairs or removing covers.

15.SAVE THESE INSTRUCTIONS.

Using Your Garage Door Opener

Your Security® opener and hand-held remote control have been factory-set to a matching code which changes with each use, randomly accessing over 100 billion new codes. Your opener will operate with up to eight Security® remote controls and one Security® Keyless Entry System. If you purchase a new remote, or if you wish to deactivate any remote, follow the instructions in the Programming section.

Activate your opener with any of the following:

The hand-held Remote Control: Hold the large push button down until the door starts to move.

The wall-mounted Door Control: Hold the push button or bar down until the door starts to move.

The Keyless Entry (See Accessories): If provided with your garage door opener, it must be programmed before use. See Programming.

When the opener is activated (with the safety reversing sensor correctly installed and aligned)

1.If open, the door will close. If closed, it will open.

2.If closing, the door will reverse.

3.If opening, the door will stop.

4.If the door has been stopped in a partially open position, it will close.

5.If obstructed while closing, the door will reverse. If the obstruction interrupts the sensor beam, the opener lights will blink for five seconds.

6.If obstructed while opening, the door will stop.

7.If fully open, the door will not close when the beam is broken. The sensor has no effect in the opening cycle.

If the sensor is not installed, or is misaligned, the door won’t close from a hand-held remote. However, you can close the door with the Door Control, the Outside Keylock, or Keyless Entry, if you activate them until down travel is complete. If you release them too soon, the door will reverse.

The opener lights will turn on under the following conditions: when the opener is initially plugged in; when power is restored after interruption; when the opener is activated.

They will turn off automatically after 4-1/2 minutes or provide constant light when the Light feature on the Multi-Function Door Control is activated. Bulb size is A19. Bulb power is 100 watts maximum.

Security® light feature: Lights will also turn on when someone walks through the open garage door. With a Multi-Function Door Control, this feature may be turned off as follows: With the opener lights off, press and hold the light button for 10 seconds, until the light goes on, then off again. To restore this feature, start with the opener lights on, then press and hold the light button for 10 seconds until the light goes off, then on again.

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Contents Garage Door Opener For Residential Use OnlyTable of Contents IntroductionSectional Door Preparing your garage doorTools needed One-Piece DoorONE-PIECE Door Without Track Sectional Door InstallationPlanning ONE-PIECE Door with TrackInstallation Hardware Carton InventoryBolt previously removed from motor unit Assembly StepAttach the Rail to the Motor Unit Installation Tighten the ChainInstallation Step Determine the Header Bracket LocationCeiling Header Bracket Installation Install the Header BracketWall 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 Facing the door from inside the garage Install The Protector SystemImportant Information about Safety Reversing Sensor Wall installation Installing the BracketsGarage door track installation preferred Floor installation FigureAligning the Safety Reversing Sensors Mounting and Wiring the Safety Reversing SensorsTroubleshooting the Safety Reversing Sectional Doors Metal, insulated or light weight factory reinforced doorsFasten the Door Bracket Wood DoorsONE-PIECE Doors Connect Door Arm to Trolley Sectional Doors onlyAssemble the door arm, Figure Adjustment procedures, FigureALL ONE-PIECE Doors Connect the door arm to the trolleyIf door does not open at least 5 feet 1.5 m Adjustment StepAdjust the UP and Down Travel Limits If the door does not close completelyTest the Down close force Adjust the ForceHOW and When to Adjust the Forces Test the UP open forceImportant Safety Check Test the Safety Reversal SystemAdjust Test The Protector SystemActivate your opener with any of the following Using Your Garage Door OpenerOperation MULTI-FUNCTION Door Control Light featureLock feature Twice a Year Care of Your OpenerOnce a Month Once a YearHaving a PROBLEM? Symptom LED is not lit on door control Safety reversing sensors wire open broken or disconnectedDoor control or wire shorted Symptom Motor unit doesn’t operateProgramming To Add or Reprogram a Hand-held Remote ControlUsing the Learn Button Using the Door Control 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.