American Garage Door Supply Supralift II, Руководство по установке

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How Supralift TM Works
Supralift TM air-powered operators utilize a dual cylinder/piston
assembly mounted to the door track. The regulator and air valve
located between your compressor and the operator directs air to
either the open or the close cylinder which pushes the piston/rod
assembly down. The drive chain is attached to the top of each
piston rod and loops over the sprocket on the doors' torsion shaft.
On the "open" signal, compressed air drives the "open" piston/rod
downward. The chain rotates the sprocket, rotating the torsion
shaft. The door responds with a smooth, fast motion to the open
position. On the “down” signal the door closes with a cushion
ed
stop, preventing cable spooling and unwanted door jerking.
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