Chamberlain 3255M 1/2 HP, 3255-2M 1/2 HP, 3245M 1/3 HP owner manual Table of Contents, Introduction

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TABLE OF CONTENTS

Introduction2-5

Safety symbol and signal word review . . . . . . . . . . . . . . 2 Preparing your garage door . . . . . . . . . . . . . . . . . . . . . . . 3 Tools needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Carton inventory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Hardware inventory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Assembly

6-7

Attach the rail to the motor unit . . . . . . . . . . . . . . . . . . . . 6 Attach the chain to the sprocket . . . . . . . . . . . . . . . . . . . 6 Tighten the chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Installation7-22

Installation safety instructions. . . . . . . . . . . . . . . . . . . 7 Determine the header bracket location . . . . . . . . . . . . . . 8 Install the header bracket. . . . . . . . . . . . . . . . . . . . . . . . . 9 Attach the rail to the header bracket . . . . . . . . . . . . . . . 10 Position the opener . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Hang the opener . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Install the door control . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Install the light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Attach the emergency release rope and handle . . . . . . 14 Electrical requirements. . . . . . . . . . . . . . . . . . . . . . . . . . 15 Install the Protector System® . . . . . . . . . . . . . . . . . . .16-18 Fasten the door bracket. . . . . . . . . . . . . . . . . . . . . . .19-20 Connect the door arm to the trolley. . . . . . . . . . . . . .21-22

Adjustment23-25

Adjust the travel limits . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Adjust the force . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Test the safety reversal system . . . . . . . . . . . . . . . . . . . 25 Test the Protector System® . . . . . . . . . . . . . . . . . . . . . . 25

Operation26-30

Operation safety instructions . . . . . . . . . . . . . . . . . . . . . 26 Using your garage door opener . . . . . . . . . . . . . . . . . . . 26 Using the wall-mounted door control . . . . . . . . . . . . . . 27 To open the door manually . . . . . . . . . . . . . . . . . . . . . . 27 Care of your garage door opener . . . . . . . . . . . . . . . . . 28 Having a problem?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Diagnostic chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Programming31-32

To add or reprogram a hand-held remote control. . . . . 31 To erase all codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 3-Button remotes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

To add, reprogram or change

a Keyless Entry PIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Repair Parts

33-34

Rail assembly parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Installation parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Motor unit assembly parts . . . . . . . . . . . . . . . . . . . . . . . 34

Accessories

35

Repair Parts and Service

36

Warranty

36

INTRODUCTION

Safety Symbol

and Signal Word Review

This garage door opener has been designed and tested to offer safe service provided it is installed, operated, maintained and tested in strict accordance with the instructions and warnings contained in this manual.

Mechanical

When you see these Safety Symbols and Signal Words on the following pages, they will alert you to the possibility of serious injury or death if you do not comply with the warnings that accompany them. The hazard may come from something mechanical or from electric shock. Read the warnings carefully.

Electrical

When you see this Signal Word on the following pages, it will alert you to the possibility of damage to your garage door and/or the garage door opener if you do not comply with the cautionary statements that accompany it. Read them carefully.

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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.
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