Chamberlain B750 User Manual

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Contents
Preparation ...................................... 2-5
Assembly .......................................6-10
Installation ..................................11-28
Install the Door Control ............21-22
Install the Protector System® ....23-26
Connect power .........................27-28
Adjustments .................................29-31
MyQ® Smartphone Control .................32
Operation .....................................33-39
Using your Garage Door Opener .....34
To Open the Door Manually ...........34
Motion Detecting
Control Panel ...........................35-36
Multi-Function Control Panel ....37-38
Remote Control .............................38
Homelink® ...................................38
To Erase the Memory .....................39
Maintenance .....................................40
Troubleshooting ........................... 41-42
Accessories ........................................ 43
Warranty ........................................... 44
Repair Parts .................................45-47
Owner’s Manual
B550 • B552 • B750
Belt Drive
Garage Door Opener
FOR RESIDENTIAL USE ONLY
PRE-PROGRAMMED REMOTE CONTROL
INCLUDED
www.chamberlain.com
www.mychamberlain.com
Smart Garage Opener
• 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 garage door opener are required to ensure
safe operation.
• The model number label is located on the left side panel of your
garage door opener.
• This garage door opener is compatible with MyQ® and
Security+b2.0® accessories.
• DO NOT install on a one-piece door if using devices or features
providing unattended close. Unattended devices and features are
to be used ONLY with sectional doors.

Chamberlain B750 Specifications

General

Drive Type	Belt Drive
Motor Power	3/4 HP
Battery Backup	Yes
Smartphone Control	Yes
Connectivity	Wi-Fi
Safety Features	Safety Sensors
Warranty	Lifetime

Summary

Preparation

Safety Symbol and Signal Word Review

Explains safety symbols and signal words used throughout the manual.

Check the Door

Guides on checking the garage door's balance and condition before installation.

Assembly

STEP 1 Assemble the rail and install the trolley

Detailed steps for assembling the rail and installing the trolley.

STEP 2 Fasten the rail to the motor unit

Instructions on securely attaching the rail to the motor unit.

STEP 3 Install the idler pulley

Steps for installing the idler pulley and aligning the rail tab.

STEP 4 Install the belt

Detailed steps for installing and connecting the drive belt.

STEP 5 Tighten the belt

Instructions for setting the correct belt tension.

Installation

IMPORTANT INSTALLATION INSTRUCTIONS

Critical safety warnings and general instructions before starting installation.

STEP 13 Install the Protector System®

Instructions for installing the safety reversing sensors.

STEP 13 Install the Protector System® (continued)

Provides alternative wall and floor mounting options for sensors.

STEP 15 Connect power

Instructions for connecting the opener to a power source.

STEP 16 Aligning the safety reversing sensors

Detailed steps for aligning the safety reversing sensors.

Installation

STEP 1 Determine the header bracket location

Guides on selecting the correct header bracket mounting position based on door type.

STEP 2 Install the header bracket

Instructions for mounting the header bracket to the wall or ceiling.

STEP 3 Attach the rail to the header bracket

Steps to connect the opener rail to the installed header bracket.

STEP 5 Hang the garage door opener

Instructions for securely hanging the garage door opener motor unit.

STEP 8 Install the door bracket

Instructions for attaching the door bracket to the garage door panel.

STEP 8 Install the door bracket (continued)

STEP 9 Connect the door arm to the trolley

STEP 9 Connect the door arm to the trolley (continued)

STEP 10 Install the door control

STEP 11 Wire the door control to the garage door opener

STEP 14 Wire the Safety Reversing Sensors

STEP 14 Wire the Safety Reversing Sensors (continued)

STEP 7 Attach the emergency release rope and handle

Steps to attach the manual release rope and handle.

Adjustments

Introduction

Adjustments

STEP 1 Program the Travel

Detailed steps for programming the door's open and close travel limits.

STEP 2 Test the Safety Reversal System

Instructions for testing the safety reversal system's functionality.

STEP 3 Test the Protector System®

Instructions for testing the safety reversing sensors' operation.

MyQ® Smartphone Control

Get Connected

Operation

IMPORTANT SAFETY INSTRUCTIONS

Comprehensive safety warnings for operating the garage door opener.

Operation

Using your Garage Door Opener

To Open the Door Manually

Operation

Motion Detecting Control Panel Features

Multi-Function Control Panel Features

Remote Control and Keyless Entry

PROGRAM USING THE DOOR CONTROL

Maintenance

Maintenance Schedule

Troubleshooting

Diagnostic Chart

A chart correlating diagnostic codes with symptoms and solutions.

Troubleshooting

Diagnostic Chart (continued)

Continues the diagnostic chart for additional codes and symptoms.

My door will not close and the light bulbs blink on my motor unit

Warranty

CHAMBERLAIN® LIMITED WARRANTY