INTRODUCTION
Congratulations on purchasing the Mastercraft® Belt Drive Garage Door Opener — a garage door
opener with many innovative features. Features include: extremely quiet operation with DC motor;
automatic force adjustment so the door can be closed with just the right amount of force, not
overpowered; and a state-of-the-art safety reversal system that protects your family and property near
the door.
Important Safety Information
The documentation provided with your opener has been carefully designed and organized to make
the assembly, operation and continued maintenance of your product as easy and safe as possible.
Assuring an extended life of this product is based upon the installation, operation, maintenance and
testing in strict accordance with the instructions and warnings stated in this manual. Read and follow all
guidelines and operating instructions before using this product. Store the manual in a safe and easily-
accessible location for future use.
Safety Symbol Overview
WARNING
This type of warning symbol is used to indicate possible mechanical hazards that may cause serious
injuries or death.
CAUTION
This type of warning symbol is used to indicate the possibility of damage to the garage door or opener.
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