Liebert® Challenger™ 3000 with Liebert iCOM® - Emerson Network ...
Liebert® Challenger™ 3000 with Liebert iCOM® - Emerson Network ...
Liebert® Challenger™ 3000 with Liebert iCOM® - Emerson Network ...
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5.2.3 <strong>Liebert</strong> Lee-Temp Refrigerant ControlAir-Cooled System—Standard and Optional FeaturesThe <strong>Liebert</strong> Lee-Temp head pressure control system is designed to maintain proper operating headpressures in outdoor temperatures down to -30°F (-34.4°C). The condensers utilize head pressurecontrol valves, extra refrigerant and insulated refrigerant receivers <strong>with</strong> heater pads. Condenser fancontrols are either fan cycling on ambient temperature or constant on. <strong>Liebert</strong> Lee-Temp control isrequired for <strong>Liebert</strong> Quiet-Line Condensers.Figure 9Air-cooled condenser <strong>with</strong> Lee-Temp<strong>Liebert</strong> Lee-TempPackage (optional)5.2.4 Series PB Indoor CondenserThe Series PB condenser converts the <strong>Liebert</strong> Challenger <strong>3000</strong>/<strong>Liebert</strong> Lee-Temp system into a selfcontainedpackage when an outdoor location is not practical.5.2.5 <strong>Liebert</strong> Quiet-Line Condensers<strong>Liebert</strong> Quiet-Line condensers can help your facility meet the strictest noise codes and do so at lessexpense than traditional condensers <strong>with</strong> acoustical shielding.5.3 Air-Cooled Split Systems—Standard Features5.3.1 Centrifugal Fan, Condensing UnitThe centrifugal condensing unit may be connected to the evaporator section by means of pre-chargedrefrigeration lines (3 ton only). This greatly simplifies installation and keeps installation costs low.The copper-tube, aluminum-fin coil is equipped <strong>with</strong> low temperature controls to assure year-roundoperation to -30°F (-34.4°C). The condensing unit is completely factory-wired, charged and tested andis ready for final connections.The centrifugal fan condensing unit includes standard scroll compressor, condenser coil, centrifugalblower assembly, high-pressure switch, <strong>Liebert</strong> Lee-Temp head pressure control.Condensing unit has hot gas bypass standard feature which bypasses hot gas around the compressordirectly to the suction side of the compressor to provide capacity control and reduce compressorcycling. System includes liquid injection valve to maintain proper suction superheat.Unit must be mounted indoors. Duct flanges are provided.10
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