Vertiv Liebert CW User Manual

2.2 Connections and System Setup
• The unit requires a drain, which must comply with all applicable codes. This drain line may
contain boiling water. See Field-installed, Gravity-fed Drain Line Requirements on page24, for
details.
• The unit requires supply and return water connections, which must comply with all applicable
codes. See Piping Requirements on page23.
• If seismic requirements apply, consult your Vertiv representative for information about a
seismic-rated floor stand.
2.3 Operating Conditions
The Liebert® CW must be operated in a conditioned space within the operating envelope that ASHRAE
recommends for data centers. Operating the CW outside of this envelope can decrease equipment
reliability. Refer to ASHRAE’s publication, “Thermal Guidelines for Data Processing Environments.”
The recommended maximum for return-air temperature is 105°F (40°C) and maximum dew point is 59°F
(15°C). The recommended minimum return-air temperature setpoint for the CW is 85°F(29.4°C).
2.3.1 Cooling, Dehumidification and Humidification
Return air to the unit must be no cooler than the ASHRAE recommendation of 68°F (20°C) DB and 40%
RH or minimum WB of 54°F (12.2°C) for proper unit operation. Operating below this can decrease
equipment reliability.
2.3.2 Humidification Control
The humidifier option is not available on the CW305, CW375, CW415. A remote humidifier contact is
available for a stand-alone humidifier.
2.4 Shipping Dimensions and Unit Weights
Model #
Domestic Packaging Export Packaging
Dry Weight, lb
(kg)
Ship Weight, lb
(kg)
Shipping Dimensions, in.
(mm)
Ship Weight, lb
(kg)
Shipping Dimensions, in.
(mm)
CW305
CW375
CW415
3890 (1764)
70x154x96.8
(1778x3911x2458)
4230 (1919)
70.5x154.5x99
(1790x3924x2514)
3300 (1497)
Fan
section
3000 (1361)
90 x 128 x 54
(2286 x 3251 x 1372)
3370 (1528)
90.5 x 128.5 x 99
(2299 x 3264 x 2515)
2300 (1043)
Table 2.2 Downflow unit domestic and export shipping dimensions and weights
Vertiv | Liebert® CW™ Installer/User Guide
12

Vertiv Liebert CW Specifications

General

Brand	Vertiv
Model	Liebert CW
Category	Control Unit
Language	English