The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
www.liftmaster.com
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Please read this manual and the enclosed safety materials carefully!
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Fasten the manual near the garage door after installation.
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The door WILL NOT CLOSE unless the Protector System
®
and cable tension monitor are
connected and properly aligned.
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Periodic checks of the garage door opener are required to ensure safe operation.
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The model number label is located behind the hinged door of your opener.
■
DO NOT exceed 10 complete cycles of door operation per hour.
For Residential and Light Duty Commercial Use
Install On Sectional Doors With Torsion
Assemblies Only
®
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Model 3800PC
GARAGE DOOR OPENER
