8
IMM AGS-2
Case 1, Building or Wall on One Side of One Unit
The existence of a screening wall, or the wall of a building, in close proximity to an air-
cooled chiller is common in both rooftop and ground level applications. Hot air
recirculation on the coils adjoining the wall will increase compressor discharge pressure,
decreasing capacity and increasing power consumption.
When close to a wall, it is desirable to place chillers on the north or east side of them. It is
also desirable to have prevailing winds blowing parallel to the unit’s long axis. The worst
case is to have wind blowing hot discharge air into the wall.
Figure 4, Unit Adjacent to Wall
H
D
Figure 5, Adjustment Factors
5 ft.
(1.5m)
6 ft.
(1.8m)
5 ft.
(1.5m)
6 ft.
(1.8m)
