Norfield 4800XY, Operator'S Manual

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4. To set the first stop, lower the X Travel Stop, move a stop collar to the left of the
travel stop, and set it at the correct distance. Measure from the left of the collar to
the right of the travel stop. This dimension should be the distance you want the
top of the lite from the top of the door plus ½”. See Photo
In the photo we want the top of the lite opening to be 4 ½” from the top of the door.
So we have set the stop at 5”.
5. To set all of the subsequent stops measure from the left side of the first stop to
the right side of the other stop. The dimension should be the vertical size of the
opening plus ½”.
In the photo we want the opening to be 20” so we set the stops at 20 ½”.
6. Set all of the other stops in the same manner measuring from the first stop.