3255 Manual
Page 4
... and bottom of door must not exceed 1/4" (6 mm). Reversing Sensor 4 Safety Reversing Sensor Safety Gap between floor Reversing Sensor and bottom of Garage Door Extension Spring OR Torsion Spring Wallmounted Door Control Access Door --- --- -- Additional materials may find it helpful to refer back to your garage door. See page 12.
... and bottom of door must not exceed 1/4" (6 mm). Reversing Sensor 4 Safety Reversing Sensor Safety Gap between floor Reversing Sensor and bottom of Garage Door Extension Spring OR Torsion Spring Wallmounted Door Control Access Door --- --- -- Additional materials may find it helpful to refer back to your garage door. See page 12.
3255 Manual
Page 8
...ceiling installation. If you can fasten the header bracket within 4 feet (1.22 m) of the left or right of the door center only if a torsion spring or center bearing plate is minimal. (It may be mounted on header wall or ceiling, otherwise garage door might not reverse when required. INSTALLATION STEP...• Header bracket MUST be used if mounting header bracket or 2x4 into masonry. • NEVER try to loosen, move or adjust garage door, springs, cables, pulleys, brackets, or their hardware, ALL of which apply to your garage, use lag screws (not provided) to securely fasten the 2x4 to...
...ceiling installation. If you can fasten the header bracket within 4 feet (1.22 m) of the left or right of the door center only if a torsion spring or center bearing plate is minimal. (It may be mounted on header wall or ceiling, otherwise garage door might not reverse when required. INSTALLATION STEP...• Header bracket MUST be used if mounting header bracket or 2x4 into masonry. • NEVER try to loosen, move or adjust garage door, springs, cables, pulleys, brackets, or their hardware, ALL of which apply to your garage, use lag screws (not provided) to securely fasten the 2x4 to...