Figure 3.2 Side view of rack with Liebert DCD
NOTE: Before using the Liebert DCD, the system and rack equipment must be checked to determine
whether they match hydraulically. In particular, the server fans must be able to generate sufficient
pressure to drive the air through the Liebert DCD.
NOTE: In case of chilled water supply system failure, the cooling is provided either by adjacent Liebert
DCD’s and/or the room cooling system. In this case, the equipment waste heat is released into the
room.
3.3 Determining Placement in the Conditioned Space
Refer to site-specific drawings for exact placement. Efficient cooling depends on proper equipment
placement, proper use of plates in any voids in the rack and good cable management.
Ensure that there is 25.6" (649mm) clearance in the rear to allow the door to open fully.
3.4 Air Flow
The server fans draw air into the rack where the equipment heats it. The server fans force the heated air
across the Liebert DCD coil. The Liebert DCD has a low air-side pressure drop, similar to a rack with
perforated doors.
Vertiv | Liebert® DCD™ User Manual | 14
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