Daktronics AB-1600-1.5,2.5 - Manual (Page 13)

Mechanical Installation
2-3
For example, an 8x80 double face display enclosed with an enclosed center cabinet would
require 120 square inches, or 0.83 square feet, of unobstructed opening in the bottom of the
center cabinet.
2(8x80)/128=10 modules
10 modules x 12 square inches = 120 in
2
or .83 feet
2
In an enclosed display, if ventilation air to the cabinet is to be pre-filtered, the effective
filter area is to be no less than 2.3 square feet per 1.0 square feet of filter face area and the
filter media is to have an average arrestance of 90-92%. Initial resistance should not exceed
0.41 wg at 500 fpm.
2.5 Removing An 8x16 Module
Refer to Section 4.1 for instructions regarding module removal and replacement.
2.6
Properly Securing The Lens And Lens Assembly
Reference Drawing: Correct Lens Position ..................................Drawing A-75204
Look down the rows of louvers from either end of the display and ensure that all lenses are
secured properly (refer to Section 4.3). Lenses that are not secured will be easily noticed 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. Also ensure that the rows of louvers are in proper alignment. Refer
to Drawing A-75204 for more information.
Be sure the seal between the lens assembly and the top of the display is waterproof. This seal
should be checked with the 0.032" feeler gauge provided. Insert the feeler gauge between the
module and the top of the display.
1. As the feeler gauge is slid along the top of the display, there should be considerable
resistance. This indicates that the weather stripping (HS-1149) is providing a good,
tight seal against moisture.
2. If the feeler gauge moves freely or with very little resistance, the cause must be
found.
It may be that the weather stripping on either the module or the border is
damaged and must be replaced.
If the weather stripping is not damaged, then the perimeter border must be
adjusted so that a good, tight seal is obtained between the weather stripping of
the module and the perimeter border.