Table Of Contents; A Review Of Safety Alert Symbols - Chamberlain 1255GM Owner's Manual

Garage door opener
Table of Contents

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Contents
A review of safety alert symbols . . . . . . . . . . . . . .2
You'll need tools . . . . . . . . . . . . . . . . . . . . . . . . . .3
binding and balance . . . . . . . . . . . . . . . . . . . . . .3
Carton inventory . . . . . . . . . . . . . . . . . . . . . . . . . .5
Hardware inventory . . . . . . . . . . . . . . . . . . . . . . . .5
Fasten T-rail to opener . . . . . . . . . . . . . . . . . . . .6
and install sprocket cover . . . . . . . . . . . . . . . . .6
Tighten the chain and cable . . . . . . . . . . . . . . . .7
Installation instruction warnings . . . . . . . . . . . . . .7
Sectional door . . . . . . . . . . . . . . . . . . . . . . . . . .8
One-piece door . . . . . . . . . . . . . . . . . . . . . . . . .9
Attach T-rail to header bracket . . . . . . . . . . . . .11
Position the opener . . . . . . . . . . . . . . . . . . . . . .12
Hang the opener . . . . . . . . . . . . . . . . . . . . . . . .13
Install the door control . . . . . . . . . . . . . . . . . . . .14
Install the light and lens . . . . . . . . . . . . . . . . . . .15
Start by reviewing these important safety alert symbols:
When you see these safety symbols on the following pages, they will alert you to the possibility of
serious injuries or death if you do not comply with the corresponding instructions. The hazard may
come from something mechanical or from electric shock. Read the instructions carefully.
WARNING
Mechanical
When you see this safety symbol 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 corresponding
instructions. Read the instructions carefully.
This garage door opener is designed and tested to offer safe service provided it is installed, operated,
maintained and tested in strict accordance with the safety instructions contained in this manual.
Page
Contents
Electrical requirements . . . . . . . . . . . . . . . . . . .16
Install the safety reversing sensor . . . . . . . . . . .18
Travel limit adjustments . . . . . . . . . . . . . . . . . . .24
Force adjustments . . . . . . . . . . . . . . . . . . . . . . .25
Test the safety reverse system . . . . . . . . . . . . .26
Operation safety instructions . . . . . . . . . . . . . . . .27
Care of your opener . . . . . . . . . . . . . . . . . . . . . . .27
Maintenance schedule . . . . . . . . . . . . . . . . . . . . .27
Operation of your opener . . . . . . . . . . . . . . . . . . .28
Having a problem? . . . . . . . . . . . . . . . . . . . . . . .30
Repair parts, rail assembly . . . . . . . . . . . . . . . . .32
Repair parts, installation . . . . . . . . . . . . . . . . . . .32
Repair parts, opener assembly . . . . . . . . . . . . . .33
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
How to order repair parts . . . . . . . . . . . . . . . . . . .36
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
CAUTION
2
®
®
. . . . . . . . . . . . . . . .26
WARNING
Electrical
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