Chamberlain 3850 User Manual download pdf (Page 2)

Introduction 2-5

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

Set the belt tension . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Attach the belt cap retainer . . . . . . . . . . . . . . . . . . . . . . .7

Installation 7-22

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 control console . . . . . . . . . . . . . . . . . . . . . . .13

Install the battery backup (optional) . . . . . . . . . . . . . . . .14

Install the lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Attach the emergency release rope and handle . . . . . .15

Electrical requirements . . . . . . . . . . . . . . . . . . . . . . . . .15

Install the Protector System

(Safety Sensors) . . . . .16-18

Fasten the door bracket . . . . . . . . . . . . . . . . . . . . . .19-20

Connect door arm to trolley . . . . . . . . . . . . . . . . . . .21-22

Adjustment 23-25

Program the travel limits . . . . . . . . . . . . . . . . . . . . . . . . .23

Setting the force . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Test the safety reversal system . . . . . . . . . . . . . . . . . . .25

Test the Protector System

(Safety Sensors) . . . . . . . . .25

Operation 26-33

Operation safety instructions . . . . . . . . . . . . . . . . . . . . .26

Using your garage door opener . . . . . . . . . . . . . . . . . . .26

Using the wall-mounted control console . . . . . . . . . . . . .27

Using the remote control . . . . . . . . . . . . . . . . . . . . . . . . .28

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

The remote control battery . . . . . . . . . . . . . . . . . . . . . . .28

Battery Backup (optional) . . . . . . . . . . . . . . . . . . . . . . . .29

To open the door manually . . . . . . . . . . . . . . . . . . . . . . .30

Care of your opener . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Having a problem? (Troubleshooting) . . . . . . . . . . . . . . .31

Diagnostic chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

LCD motion detecting control console messages . . . . .33

Programming 34-35

To add or reprogram a hand-held remote control . . . . . .34

To erase all codes from motor unit memory . . . . . . . . . .34

3-Button remotes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

To add, reprogram or change a Keyless Entry PIN . . . .35

Repair Parts 36-37

Rail assembly parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

Installation parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

Motor unit assembly parts . . . . . . . . . . . . . . . . . . . . . . . .37

Accessories 38

Notes 39

Repair Parts and Service 40

Warranty 40

TABLE OF CONTENTS

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.

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

Electrical

WARNING

CAUTION

WARNING

CAUTION

WARNING

CAUTION

WARNING

1 2 3 4 5 6 7 ... 39 40

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Chamberlain 3850 User Manual Page 2

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