Environmental Guidelines
DVN 5000
24-10520-22 Rev. –
31
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© 2009 Johnson Controls, Inc.
Pressurizing Racks
Pressurizing the rack (rather than sucking the air out of the top) is the best solution
for dusty or dirty environments where filters need to be changed regularly.
Figure 20: Correct Use of Pressuring a Filtered Rack without Front Intakes
Although less thermally efficient, pressurizing helps clean air escape through cracks
and openings, rather than allowing dirty air to enter.