Daikin Pathfinder AWS190CDS - Case 4: Open Screening Walls

IOM 1202 7
Installation and Startup
Case 3: Three or More Units Side By Side
When three or more units are side by
side, the outside chillers
(1 and 3 in this case) are influenced by the middle unit only on
their inside circuits. Their adjustment factors will be the same
as Case 2. All inside units (only number 2 in this case) are
influenced on both sides and must be adjusted by the factors
shown below.
Figure 6: Three or More Units - Adjustment Factor.
Full Load Capacity Adjustment Factor
0.00
1.00
2.00
3.00
8
(2.4)
12
(3.6)
16
(4.8)
20
(6.1)
Distance Between Units in ft. (m)
Capacity Reduction (%
)
Full Load Power Adjustment Factor
0.00
2.00
4.00
6.00
8
(2.4)
12
(3.6)
16
(4.8)
20
(6.1)
Distance Between Units in ft. (m)
Power Increase (%)
Case 4: Open Screening Walls
Decorative screening walls are often used to help conceal a
unit eith
er on grade or on a rooftop. Design these walls 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 5, Pit Installation.
The distance from the sides of the u
nit
to the side walls must
be sufficient for service, such as 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 (1 meter and 5 meters to
equal 3 meters).
Figure 7: Open Screening Walls - Adjustment Factors
Wall Free Area vs Distance
0.00
2.00
4.00
6.00
8.00
0 1020304050
% Open Wall Area
D - Distance from Wall to Unit in Ft. (m)