Liebert Challenger 3000 with iCOM

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Air-Cooled Models—Self-Contained CompressorVariable Fan Speed Charging1. Check unit nameplate for refrigerant type to be used. Unit control configurations differ dependingon refrigerant type.2. Refrigerant charging requires unit operation. Refer to 2.9 - Checklist for CompletedInstallation.3. Calculate the amount of charge for the system. Refer to the unit, condenser and refrigerant linecharge data in Tables 6, 7, 8 and 9.4. Weigh in as much of the system charge as possible before starting the unit.! CAUTIONRisk of improper refrigerant charging. Can cause equipment damage.Refrigerant R407C is a blend of three components and must be introduced and charged fromthe cylinder only as a liquid.When adding liquid refrigerant to an operating system, it may be necessary to add therefrigerant through the compressor suction service valve. Care must be exercised to avoiddamage to the compressor. Emerson recommends connecting a sight glass between thecharging hose and the compressor suction service valve. This will permit adjustment of thecylinder hand valve so that liquid can leave the cylinder while allowing vapor to enter thecompressor.5. Turn on unit disconnect switch. Operate the unit for 30 minutes using the charging function forthe system in the diagnostic section of the Liebert iCOM control (see Liebert iCOM user manual,SL-18835). The charging function operates the compressor at full capacity and energizes theblower motor and the liquid line solenoid valve. The reheat and humidifier are disabled. Aminimum 20psig (138kPa) must be established and maintained for the compressor to operate.The charging function can be reset as many times as required to complete unit charging.Table 10 Fan speed suction pressure transducer settingsFunctionGauge (Sea Level)psiG (kPa)R-407CAbsolutepsiA (kPa)Pump-Down Cutout 20 (138) 35 (241)Pump-Down Reset 65 (448) 80 (552)Minimum to Start-Cooling 35 (241) 50 (344)Low-Pressure Cutout (DX only) 52 (358) 67 (461)6. Charge the unit until the liquid line sight glass becomes clear. Then add one additional pound(2.2kg) of refrigerant.NOTEA digital scroll compressor will have a clear sight glass only when operating at 100% capacity.When operating below 100%, the sight glass may show bubbles with each 15-second unloadingcycle.7. As head pressure builds, the variable fan speed controlled condenser fan begins rotating. The fanwill run at full speed when sufficient head pressure is developed—fan starts to rotate at 190 psig(1310 kPA) and is full speed at 250 psig (1724 kPA).28
Air-Cooled Models—Self-Contained CompressorFigure 15 General arrangement—Air-cooled models with fan speed controlCondenserCoil* Inverted trap ondischarge and liquid linesto extend above base ofcoil by a minimumof 7-1/2" (190mm)SchraderValveSchraderValveOptional Field-InstalledFusible Plug* For rises over25ft. (7.6m), trapevery 20ft. (6m) orat evenly spacedpointsLiquid ReturnShutoff*ValveHot GasBypassValveSolenoidValvesSightGlassExpansionValveEvaporatorCoilSensingBulbFilterDrierHot GasBypassServiceValvesScrollCompressorExternalEqualizersHot GasDischarge* Trap at baseof risers longerthan 5ft. (1.5m)CheckValveSINGLE CIRCUIT SHOWNFACTORY PIPINGFIELD PIPING* Components are not supplied by Liebert butare recommended for proper circuit operationand maintenance.DPN000349Rev. 529
Page 1: Precision CoolingFor Business-Criti
Page 5 and 6: 7.5 Centrifugal Air-Cooled Condensi
Page 7 and 8: IMPORTANT SAFETY INSTRUCTIONSSAVE T
Page 9 and 10: Introduction1.0 INTRODUCTION1.1 Sys
Page 11 and 12: Installation (Applicable to all Mod
Page 23 and 24: Figure 11 Piping connections for ch
Page 29 and 30: 3.0 AIR-COOLED MODELS—SELF-CONTAI
Page 31 and 32: Air-Cooled Models—Self-Contained
Page 33: Air-Cooled Models—Self-Contained
Page 37 and 38: Air-Cooled Models—Self-Contained
Page 39 and 40: Figure 17 General arrangement—Air
Page 41 and 42: 4.0 WATER-COOLED MODELS—SELF-CONT
Page 43 and 44: Figure 20 General arrangement diagr
Page 45 and 46: Water-Cooled Models—Self-Containe
Page 47 and 48: Glycol/GLYCOOL-Cooled Models—Self
Page 49 and 50: NOTICEGlycol/GLYCOOL-Cooled Models
Page 51 and 52: 5.5.2 Glycol SolutionsGlycol/GLYCOO
Page 57 and 58: Figure 27 General arrangement—GLY
Page 59 and 60: 5.5.4 Motor Ball Valve—Digital Sc
Page 61 and 62: Chilled Water ModelsFigure 30 Chill
Page 63 and 64: 7.2.2 Low VoltageSplit System Model
Page 65 and 66: Split System ModelsTable 24 Line co
Page 67 and 68: Table 26Horizontal air discharge ca
Page 69 and 70: Table 28Split System ModelsCabinet
Page 71 and 72: Split System Models7.5 Centrifugal
Page 73 and 74: Figure 36 3-ton centrifugal air-coo
Page 75 and 76: Split System ModelsFigure 38 5-ton
Page 77 and 78: Split System ModelsFigure 40 Split
Page 79 and 80: 7.6.4 Glycol SystemsSplit System Mo
Page 81 and 82: Split System ModelsFigure 43 5-ton
Page 83 and 84: R407C Refrigerant8.0 R407C REFRIGER
Page 85 and 86:
R407C RefrigerantNOTES79
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Ensuring The High AvailabilityOf Mi
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Liebert Challenger 3000 with iCOM

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