Preparing Your Door; Before You Begin - LiftMaster LJ8950W Manuel

Introduction

Preparing Your Door

BEFORE YOU BEGIN:

• Remove any ropes connected to door.
• Raise and lower the door to ensure
the door does not bind or stick and
is properly balanced. If your door
binds, sticks or is out of balance refer
to the door manufacturer for more
information. Doors heavier than 650
lbs. should NOT open or fall rapidly.
For live shaft type doors the drive
shaft needs to extend 1-1/2" beyond
the door mount bracket.
• If the operator is mounted below
8 ft. (2.5 m), a chain guard must be
installed to protect against possible
injury. See accessories page.
To prevent possible SERIOUS INJURY or DEATH:
• ALWAYS call a trained door systems technician if door binds, sticks or is out of
balance. An unbalanced door may NOT reverse when required.
• NEVER try to loosen, move or adjust door, door springs, cables, pulleys, brackets
or their hardware, ALL of which are under EXTREME tension.
• Disable ALL locks and remove ALL ropes connected to door BEFORE installing
and operating door operator to avoid entanglement.
• DO NOT install operator below 6 feet (1.83 m).
To prevent damage to door and operator:
• ALWAYS disable locks BEFORE installing and operating the operator.
• ONLY operate door operator at 120V, 60 Hz to avoid malfunction and damage.
• DO NOT exceed 10 complete cycles of door operation per hour.
• DO NOT run operator if the door is locked.
• Chain guard to be installed where the drive chain is exposed lower than 8 feet
(2.5 m).
Volts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120 Vac - 60 Hz, ONLY
Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 AMP
Rated Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .385 in. lb./sec. 10 Cycles per Hour
Maximum Door Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 ft.
Maximum Door Size . . . . . . . . . . . . . . . . . . .14 ft. x 12 ft. (not to exceed 168 sq./ft.)
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SPECIFICATIONS