Liebert XDC user manual General Product Information, Equipment Inspection, Equipment Handling

Product Description

1.0PRODUCT DESCRIPTION

1.1General Product Information

1.1.1Product/System Description

The Liebert XDC™ (eXtreme Density Chiller) is self-contained refrigeration distribution unit designed to cool rooms with high heat producing equipment. There are two distinct circuits, each uti- lizing different refrigerants and mechanical parts. The R-134a circuit is the “pumped” circuit contain- ing redundant circulating pumps, a brazed plate heat exchanger along with valves and piping. The R-407c circuit is the dual direct expansion circuit containing scroll compressors, expansion valves, brazed plate heat exchanger, and piping. Heat removal is accomplished by using condensers con- nected to the dual direct expansion circuit. Heat rejection is available in two options: an outdoor air cooled condenser and a water/glycol condenser. See Figure 1 below.

The Liebert XDC monitors room conditions and prevents coil condensation by maintaining the coolant being pumped to the cooling modules at a temperature above the room dew point. All functions, such as temperature control, switching pumps (if necessary), etc., are automatic.

The Liebert XDC’s minimum recommended operating load is 40% of system nominal capacity. For example, a Liebert XDC160 60Hz system’s minimum load would be 64 kW. Loading below this value can unfavorably affect system operation. Consult factory for any loading below this recommendation.

See Table 25 for the Liebert XDC160 rated cooling capacity.

Figure 1 Liebert XDC components

Condenser	Liebert XDC	Liebert XD Cooling Modules
	Compressor
Unit
	Heat Exchanger	Pumps
	Receiver

1.2Equipment Inspection

When the unit is delivered, inspect all items for visible and concealed damage. Damage should be immediately reported to the carrier and a damage claim filed with a copy sent to Liebert or to your sales representative.

1.3Equipment Handling

! WARNING

Risk of unit falling over. Can cause death, injury and equipment damage.

The Liebert XDC is top-heavy. Use extreme caution and care when moving and installing this unit.

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