Daktronics AB-1600-1.5,2.5 - Manual (Page 20)

Electrical Installation 2-6
provide air at a rate of 110 cubic feet per minute, per module (one module = 20" x 40" display active
area, or 8 rows by 16 columns of lamps).
For example, a 24x80 double-face display with an enclosed center cabinet would require 360 square
inches, or 2.5 feet, of unobstructed opening in the bottom of the center cabinet.
[2(24x80)]/128 = 30 modules
30 modules x 12 square inches = 360 in 2 or 2.5 feet 2
2.9 Verifying Correct Lens & Module Position
The final steps of mechanical installation involve verifying that all lens position properly upon their
respective lens/reflector assemblies and that all modules fully engage into the cabinet.
Look down the rows of louvers from either end of the display and ensure that all lenses secure
properly. Lenses not secured properly are easily noticeable as the lens removal tab, or the lens itself,
will not be in alignment with the other lenses or lens removal tabs of that row.
Refer to Figure 20 and the following steps to return a lens to its correct position.
1. First, insert the bottom indexing tabs into the slots. There is one indexing tab on each bottom
corner of the lens.
2. While gently pushing the above louver upward, grab the lens tab and push the top of the lens
behind and under the louver offset. Only push the louver upward enough to allow the lens to snap
into position behind the offset.
3. Release the louver and verify the lens aligns with others in the row.
Also, ensure that the rows of
louvers are in proper
alignment. If any rows seem
out of position this may
indicate that one, or both,
sides of the lens/reflector
assembly do not fully engage
into the cabinet. If this is the
case, a firm push to both sides
of the module at the same time
should snap the module into
place.
Figure 20 : Correct Lens Position