Johnson Controls DVN 5000 Series, Руководство пользователя, Страница: 36 / 46

Figure 22: Incorrect Use of Forced Air on a Raised Floor with a Floor Grate and
High-Density Servers
DVN 5000 Environmental Guidelines
34 24-10520-22 Rev. –
This document contains confidential and proprietary information of Johnson Controls, Inc.
© 2009 Johnson Controls, Inc.
A balanced system uses cool air effectively by not allowing it to re-circulate back to
the HVAC unit without removing heat.
In a data center system designed for airflow, the total cabinet fan CFMs should not
exceed the CFM of the room’s HVAC unit. If this situation occurs, the required
static pressure drops and some cabinets will be in need of essential CFMs of airflow,
possibly resulting in overheated equipment.