C: INSTALLING THE OPERATOR
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Door
Header Bracket
Bracket Distance Above Floor (See Chart)
Highest Point
of Travel
Measure Distance to Floor
Garage
Floor
STEP 1A: Mounting the Front Bracket — One
Piece Doors Without Track: Mark a vertical centerline on the header above the door. Manually raise the door to its high arc position and temporarily clamp in that position. With the door in this high arc position, measure the distance from the top of the door to the floor (see figure at left). Subtract the actual door height from the high arc distance to the floor. This is the high arc rise of the door. Unclamp and close the door. Using the table below, draw a horizontal line at the appropriate height above the door to intersect with the vertical centerline.
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HIGH ARC RISE | HIGH ARC RISE HORIZONTAL LINE |
|
|
4 INCHES | 6 INCHES |
|
|
4 TO 8 INCHES | 11 INCHES |
|
|
8 TO 12 INCHES | 16 INCHES |
|
|
Mount the Front Mounting Bracket securely with lag screws as shown in figure below. If necessary, reinforce the header with steel angle iron or wood to ensure a secure mount.
VERTICAL
CENTERLINE
HIGH ARC (RISE)
HORIZONTAL LINE
LAG SCREWS 5/16” X
8
