Operating instructions

IMM AGSB-60 11
Case 3, Open Screening Walls
Decorative screening walls are often used to help conceal a unit either on grade or on a
rooftop. These walls should be designed such that the combination of their open area and
distance from the unit do not require performance adjustment. It is assumed that the wall
height is equal to, or less than the unit height when mounted on its base support. This is
usually satisfactory for concealment. If the wall height is greater than the unit height, see Case
4, Pit Installation.
The distance from the sides of the unit to the side walls should be sufficient for service and
opening control panel doors.
If each side wall is a different distance from the unit, the distances can be averaged, providing
either wall is not less than 8 feet (2.4 meters) from the unit. For example, do not average 4 feet
and 20 feet to equal 12 feet.
Figure 10, Open Screening Walls
Figure 11, Wall Free Area vs. Distance