Liebert DCD User Manual

Figure 3.3 Generic airflow diagram
NOTE: To provide optimal cooling, strict separation between the hot and cold air must exist within the
rack and all the bushings (network cables, piping, etc.) must be sealed to prevent air leakage. Air
bypass and recirculation can severely reduce the cooling effectiveness of the Liebert DCD.
Blanking plates must be installed in any voids in the rack to prevent air bypass and air recirculation.
Keep the Liebert DCD’s coils clear of any obstructions that may block the airflow.
Contact the factory for further information. Refer to the user manual supplied with the rack the Liebert
DCD is mounted on.
3.5 Water Quality
For reliable function of the Liebert DCD, chilled water must be available in an appropriate amount, at the
appropriate temperature and pressure. The water quality must be in accordance with VGB-R 455 P. (see
Water Quality on page50)
3.6 Water Temperature
The cold water supply temperature must be higher than the dew point temperature of the cold space.
Failure to maintain the cold water supply temperature above the room dew point will result in
condensation. The Liebert DCD is designed only for sensible cooling; dehumidification of the room by
means of the Liebert DCD must be avoided. The built-in condensate tray with condensate drain is
designed only for a short-term condensation.
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Liebert DCD Specifications

General

Brand	Liebert
Model	DCD
Category	Racks & Stands
Language	English