Chamberlain LiftMaster Security+ 311 User Manual

GARAGE DOOR OPENER
Model 311
For Residential Use Only
Owner’s Manual
■ 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
®
is connected and
properly aligned.
■ Periodic checks of the opener are required to ensure safe operation.
■ The model number label is located on the front panel of your opener.
®

Chamberlain LiftMaster Security+ 311 Specifications

General

Type	Garage Door Opener
Horsepower	1/2 HP
Compatibility	Compatible with most garage doors
Frequency	315 MHz
Battery Backup	No
Max Door Height	7 ft
Security Features	Security+ Rolling Code Technology
Security Technology	Security+
Maximum Door Height	7 ft