ELITE Series
Garage Door Opener
Models
• 8550 - DC Belt Drive
with Battery Backup
• 8557 - 3/4 hp
Belt Drive
FOR RESIDENTIAL USE ONLY
■ 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
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 ONLY compatible with MyQ
accessories.
■ DO NOT enable the Timer-to-Close feature if you are installing the garage door
opener on a one-piece door. The Timer-to-Close is to be used ONLY with
sectional doors.
NOTE: If you are installing the garage door opener on a one-piece door, visit
www.liftmaster.com for installation instructions.
.
®
is connected and properly
®
and Security✚ 2.0™
Write down the following information for
future reference:
Serial Number:
Date of Purchase:
CONTENTS
Assembly . . . . . . . . . . . . . . . . .4-5
®
. . 17-20
Power. . . . . . . . . . . . . . . . . . 21-22
Operation . . . . . . . . . . . . . . . . . 28
Features . . . . . . . . . . . . . . . . . . 29
Warranty. . . . . . . . . . . . . . . . . . 38
* If applicable
www.liftmaster.com
The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196