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Chamberlain LiftMaster Security+ 311 User Manual

Chamberlain LiftMaster Security+ 311
80 pages
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GARAGE DOOR OPENER
Model 311
For Residential Use Only
Owner’s Manual
Please read this manual and the enclosed safety materials carefully!
Fasten the manual near the garage door after installation.
The door WILL NOT CLOSE unless the Protector System
®
is connected and
properly aligned.
Periodic checks of the opener are required to ensure safe operation.
The model number label is located on the front panel of your opener.
®

Table of Contents

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Chamberlain LiftMaster Security+ 311 Specifications

General IconGeneral
TypeGarage Door Opener
Horsepower1/2 HP
CompatibilityCompatible with most garage doors
Frequency315 MHz
Battery BackupNo
Max Door Height7 ft
Security FeaturesSecurity+ Rolling Code Technology
Security TechnologySecurity+
Maximum Door Height7 ft

Summary

Introduction and Safety Guidelines

Safety Symbol and Signal Word Review

Explains safety symbols (Warning, Caution) and their meanings in the manual to ensure safe operation.

Preparing Your Garage Door for Installation

Steps to ensure the garage door is ready and balanced for opener installation, including disabling locks.

Planning Installation Requirements

Identifies door type, height, and garage area conditions for proper opener installation, noting potential needs.

Opener Assembly and Installation

Assemble Rail and Attach Idler Pulley Bracket

Connects rail sections and attaches the idler pulley bracket to the front of the rail assembly.

Install Chain/Cable and Sprocket Cover

Guides installation of the chain/cable and securing the sprocket cover for safe operation.

Installation Safety Instructions

Essential safety guidelines to follow before and during opener installation to prevent injury or death.

Determine Header Bracket Location

Identifies the correct mounting position for the header bracket on the wall or ceiling based on door type.

Install the Protector System® Sensors

Details the installation and alignment of safety reversing sensors for safe door operation and obstruction detection.

Fasten the Door Bracket

Instructions for securely attaching the door bracket to the garage door, including reinforcement needs for lightweight doors.

Adjustment, Testing, and Operation

Adjust UP and DOWN Travel Limits

Sets the open and close points for the garage door opener's travel to ensure proper door movement.

Adjust Door Force Settings

Regulates the amount of power needed to open and close the door safely, preventing interruptions or damage.

Test Safety Reversal System

Verifies the opener's ability to reverse upon encountering an obstruction, a critical safety feature.

Using Your Garage Door Opener

Explains how to operate the opener using remotes, wall controls, and other methods for daily use.

Troubleshooting Common Opener Problems

Offers solutions for common issues encountered with the garage door opener, covering operation and maintenance.

Programming, Parts, and Warranty

Add or Reprogram Remote Control

Step-by-step guide to program new or existing remotes to operate the garage door opener.

Manage Keyless Entry PIN

Instructions for adding, reprogramming, or changing keyless entry PINs for secure access.

Repair Parts and Service Information

Lists available parts for repair and replacement, including part numbers and how to order.

Liftmaster One Year Limited Warranty

Outlines the terms and conditions of the product's limited warranty coverage and exclusions.

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