32 ALR 110F – 150F Product Manual ALR2-3
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
quite 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. Only the compressors connected to these coils will be affected. Circuits
opposite the wall are unaffected.
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 13, Unit Adjacent to Wall
Figure 14, Adjustment Factors
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