Data Sheet

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Technical System Catalogue/Climate control
Rittal CRAC DX system
 The refrigerant-cooled CRAC DX system operates in
conjunction with an external condenser unit that utilises
external air for cooling. This combination is used prima-
rily in small locations with a low cooling output.
 The CRAC DX system operates on the principle of direct
evaporation, and is fitted as standard with the innovative
Energy Save Control (ESC): At reduced external tem-
peratures, the power consumption of the compressors
is reduced while at the same time, their cooling output
rises, so that redundant compressors may be switched
off.
Rittal CRAC CW system
 The water-cooled CRAC CW system may be used in
conjunction with a Rittal IT chiller, so that the operating
costs of the system may be reduced still further with
optimum use of the external temperatures.
 The CRAC CW system is designed for IT rooms with a
high thermal load, and may be combined with various
mechanical cooling systems such as chillers or free
coolers. Thanks to the underfloor fan arrangement, the
enclosure is able to accommodate a filter and heat
exchanger with increased surface areas.
Energy saving through
redundancy
 More space for larger heat exchangers and filters
 High cooling output with minimal space requirement and
small footprint
 Low power consumption in year-round operation
 Very high energy-saving figures
 Low maintenance costs
Energy saving through redundancy operation:
3.3 kW at 44000 m
3
/h air volume
2 fan units
at full load,
1 fan unit standby:
2 x 3 kW = 6 kW
3 fan units
at partial load:
3 x 0.9 kW = 2.7 kW
CRAC system