Chamberlain 8550 Manual

Write down the following information
for future reference:
Serial Number:
Date of Purchase:

Belt Drive Garage Door Opener

Model 8550
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™ and Security✚
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
.
The Chamberlain Group, Inc.
Elmhurst, Illinois 60126-1196
BELT DRIVE GARAGE DOOR OPENER .. 1
PREPARATION ............................. 2
ASSEMBLY ................................. 4
INSTALLATION ........................ 6-13
INSTALL THE DOOR CONTROL .....14-16
INSTALL THE
PROTECTOR SYSTEM
POWER ................................21-22
ADJUSTMENT.........................23-25
BATTERY BACKUP ...................26-27
OPERATION ...............................28
FEATURES.................................29
DOOR CONTROL .....................30-31
REMOTE CONTROLS .................32-33
TO ERASE THE MEMORY ...............33
® 2.0
TO OPEN THE DOOR MANUALLY ......34
MAINTENANCE ...........................34
TROUBLESHOOTING .................35-36
REPAIR PARTS .......................37-38
ACCESSORIES ............................39
WARRANTY ...............................40
www.liftmaster.com
845 Larch Avenue
Contents
® ..............17-20