Table Of Contents; Introduction; Safety Symbol And Signal Word Review - Chamberlain LiftMaster 3275C Owner's Manual

TABLE OF CONTENTS

Introduction
Safety symbol and signal word review . . . . . . . . . . . . . . . . . . . . . 2
Preparing your garage door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Tools needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Carton inventory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installation hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Assembly
Attach the rail to the motor unit . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Attach the chain spreader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Tighten the chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Installation
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
Fasten the door bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19-20
Connect the door arm to the trolley . . . . . . . . . . . . . . . . . . . .21-22

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
®
. . . . . . . . . . . . . . . . . . . . . . . . .16-18
Electrical
2-5 Adjustment
Adjust the travel limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Adjust the force . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Test the safety reversal system. . . . . . . . . . . . . . . . . . . . . . . . . . 25
Test the Protector System
Operation
Operation safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6-7
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
7-22
Diagnostic chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Programming
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
Rail assembly parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Installation parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Motor unit assembly parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Accessories
Repair Parts and Service
Warranty
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.
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.
2
® . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
23-25
26-30
31-32
33-34
35
36
36