Liebert Deluxe System/3 - DX

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Water Cooled Models5.0 WATER COOLED MODELS5.1 Piping ConsiderationsManual shut-off valves should be installed at the supply and return lines of each unit. This will providefor routine maintenance or emergency isolation of the unit.When the water source for the condenser is of poor quality, it is good practice to provide cleanable filtersin the supply line. These filters will trap the particles in the water supply and extend the servicelife of the water-cooled condenser.To provide for the emergency of water leaks and the consequences of sub-floor flooding, floor drainsshould be provided with wet traps or a water detection system such as a Liqui-Tect sensor that isinstalled near the base of the unit or below the elevated floor.5.2 CondenserThe condenser is designed to operate in conjunction with either a cooling tower or city water.5.3 Water Regulating ValveWater regulating valves automatically open on refrigerant pressure increase and close on pressuredecrease.To adjust the head pressure, attach refrigeration gauges to the compressor discharge and suction servicevalves. Raise the head pressure by turning the adjusting screw counterclockwise. Lower the headpressure by turning the adjusting screw clockwise. Allow enough time between changes for the systemto stabilize.5.3.1 Testing Valve FunctionWhen the refrigeration system has been off for approximately 10-15 minutes, the water flow shouldstop.Should the water continue to flow, the valve is either improperly adjusted or the pressure sensingcapillary is not connected properly to the condenser.5.3.2 Manual FlushingThe valve may be flushed by inserting a screwdriver or similar tool under the two sides of the mainspring and lifting. This action will open the valve seat and flush any dirt particles from the seat.Table 35 Refrigerant control settings for water cooled units—psi (kPa)RefrigerantTypeLowPressureCut OutLowPressureCut InHighPressureCut OutR–22 20 (137.9) 65 (448.2) 360 (2482)48
Water Cooled ModelsFigure 32 Water cooled general arrangementSingle Refrigeration Circuit ShownSolenoidValvesEvaporator CoilExpansionValveSensingBulbHot GasReheat Coil(optional ondownflowunits only)Water CoolantCircuit(one requiredper unit)FluidFluidReturnSupplyfrom Unitto UnitBypassValves(optional)ShutoffValveFilterDryerLiquidReturnSightGlassHot GasBypass(optional)ReliefValveCondenserMufflerHot GasBypassValveServiceValvesCompressorCheckValveExternalEqualizersCylinderUnloader(optional)Solenoid Valveprovided withoptional hotgas reheatShutoffValves*2-way WaterRegulatingValvesTo 2ndrefrigerationunitCondenserHose Bibs*Factory PipingOptional PipingField Piping3-way WaterRegulating Valve(optional)* Components are not supplied by<strong>Liebert</strong> but are recommended forproper circuit operation andmaintenanceDPN000543 Rev049
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Precision CoolingFor Business-Criti
Page 5: FIGURESFigure 1 Downflow (DH and DE
Page 8 and 9: Table iiUnit weightsAir Cooled Mode
Page 10 and 11: 1.1.3 GLYCOOL (Chilled Glycol Cool
Page 12 and 13: Installation2.3 Unit DimensionsFigu
Page 14 and 15: InstallationFigure 2Upflow 6, 8 and
Page 16 and 17: InstallationFigure 4 Upflow 15, 20
Page 18 and 19: InstallationFigure 6Projection ofdi
Page 20 and 21: 2.4 PipingInstallationAll fluid and
Page 22 and 23: InstallationFigure 9Electrical fiel
Page 24 and 25: Installation2.6.3 Ducted Applicatio
Page 26 and 27: InstallationFigure 12 Plenum dimens
Page 28 and 29: 3.3 Refrigerant PipingAir Cooled Mo
Page 30 and 31: Air Cooled ModelsFigure 14 Piping:
Page 32 and 33: Air Cooled ModelsFigure 16 Upflow a
Page 34 and 35: Air Cooled ModelsTable 13ModelCSF/C
Page 36 and 37: Air Cooled ModelsFigure 19 Air cool
Page 38 and 39: Air Cooled ModelsFigure 21 Piggybac
Page 40 and 41: Air Cooled ModelsTable 19 Indoor un
Page 42 and 43: Air Cooled Models3.5.4 Charging1. M
Page 44 and 45: Glycol Cooled/GLYCOOL Models4.0 GLY
Page 46 and 47: Glycol Cooled/GLYCOOL ModelsFigure
Page 52 and 53: Figure 29 6- and 8-fan drycooler ca
Page 58 and 59: Water Cooled ModelsFigure 33 Downfl
Page 60 and 61: Table 37Factory-provided piping con
Page 62: 54Water Cooled Models
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Liebert Deluxe System/3 - DX

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