Technical Specifications

System Description

1.6 Liebert XDO—Overhead Cooling Module

The Liebert XDO is an overhead cooling system designed for installation above heat-dissipating

equipment. A fan draws hot air exhausted from the equipment through two cooling coils and

discharges cool air back down to the equipment (see Figure 6).

A Liebert XDO smart module will allow remote monitoring, shutdown, fan failure alarms, condensate

detection and automatically cycling the fan On and Off as the heat load requires. The Liebert

XDP/Liebert XDC monitors room conditions and prevents coil condensation by maintaining the

temperature of the refrigerant pumped to the Liebert XDOs above the room dew point.

The Liebert XDO is available for hard-piped configurations or with Liebert XD Flex Pipes with quick-

connect couplings (one-shot) for easy connection to the header system. When the pre-charged option is

selected, the Liebert XDO and the one-shot flexible pipes contain R134a.

Figure 6 Suspended Liebert XDO modules in hot aisle-cold aisle arrangement

NOTE

The Liebert XDO is the most sensitive module to system load. The Liebert XDO’s air intake and

the discharge are not separated by a rack. This can lead to the Liebert XDO pulling in cold air

rather than hot air. The Liebert XDP and Liebert XDC minimum loads must be met to prevent

this from occurring.

Cold Aisle

Hot Aisle

Cold Aisle