Table of Contents
Advertisement
Case 4: Open Screening Walls
Decorative screening walls are often used to help conceal a
unit either on grade or on a rooftop. When possible, design
these walls such that the combination of their open area
and distance from the unit (see
performance adjustment. If the wall opening percentage is less
than recommended for the distance to the unit, it should be
considered as a solid wall. It is assumed that the wall height is
equal to or less than the unit height when mounted on its base
support. If the wall height is greater than the unit height, see
Case 5: Pit/Solid Wall Installation. The distance from the sides
of the unit to the side walls must be sufficient for service, such
as opening control panel doors. For uneven wall spacing, the
distance from the unit to each wall can be averaged providing
no distance is less than 4 feet. Values are based on walls on all
four sides.
Figure 16: Allowable Wall Open Area
Figure 17: Case 4 - Adjustment Factor
Wall Free Area vs . Distance
13.0
12.0
11.0
10.0
9.0
8.0
7.0
6.0
5.0
4.0
0
10
AWV008-010
AWV020
AWV028
IOM 1242-2 • PATHFINDER
Figure
16) do not require
20
30
40
% Open Wall Area
AWV012-014
AWV016
AWV018
AWV022
AWV024
AWV026
AWV030
MODEL AWV CHILLERS
®
I
nsTallaTIon and
Case 5: Pit/Solid Wall Installation
Pit installations can cause operating problems resulting from
air recirculation and restriction and require care that sufficient
air clearance is provided, safety requirements are met and
service access is provided. A solid wall surrounding a unit is
substantially a pit and this data should be used. Derates are
based on single chiller installation only.
Steel grating is sometimes used to cover a pit to prevent
accidental falls or trips into the pit. The grating material
and installation design must be strong enough to prevent
such accidents, yet provide abundant open area to avoid
recirculation problems. Have any pit installation reviewed by
the Daikin Applied sales representative prior to installation to
ensure it has sufficient air-flow characteristics and approved by
the installation design engineer to avoid risk of accident.
Figure 18: Pit Installation
H
D
Figure 19: Case 5 for AWV008-010
Full Load Capacity Reduction (AWV008-010)
6.0
5.0
4.0
3.0
2.0
1.0
0.0
0
8
Distance = 6 ft
Power Increase (AWV008-010)
9.0
8.0
7.0
6.0
50
5.0
4.0
3.0
2.0
1.0
0.0
0
8
Distance = 6 ft
12
a
C
pplICaTIon
onsIderaTIons
Control
Panel
10
12
Depth of Pit / Wall Height (ft)
Distance = 8 ft
Distance = 10 ft
10
12
Depth of Pit / Wall Height (ft)
Distance = 8 ft
www.DaikinApplied.com
13
14
13
14
Distance = 10 ft
Hide quick links:
Advertisement
Table of Contents
