For Light Duty Commercial Use
Install On High-Lift and Vertical
Sectional Doors With
Torsion Assemblies Only
NOT FOR RESIDENTIAL USE
Light-Duty Dock Door Operator
for Sectional Doors
Model DDO8900W
LiftMaster
300 Windsor Drive
Oak Brook, IL 60523
• Please read this manual and the enclosed safety materials carefully!
• The door WILL NOT CLOSE unless the Protector System
®
and cable tension monitor
are connected and properly aligned.
• Periodic checks of the operator are required to ensure safe operation.
• The model number is located on the front cover of the operator.
• DO NOT exceed 10 complete cycles of door operation per hour.
This product is to be installed and serviced by a trained door systems technician only.
This product may require adjustments to door springs and/or track configurations. This
product is not intended for use on low headroom tracks with outside pickup drum or
doors utilizing extension springs.
2 YEAR WARRANTY
After Installation, Please Leave with Customer
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Send it in
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