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Liebert DS Cooling Configurations, Air-Cooled, Glycol-Cooled, Glycool, Water-Cooled, Dual-Cool

Models: DS

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Cooling Configurations

Cooling Configurations

2.0COOLING CONFIGURATIONS

NOTE

All field-installed piping must comply with applicable local, state and federal codes.

Air-Cooled

Air-cooled unit piping is spun closed from the factory and contain a nitrogen holding charge. Each installation requires refrigerant piping to a condenser.

Glycol-Cooled

Glycol-cooled units are factory-charged and tested. Field-installed piping is required from the unit to the drycooler and pump package.

GLYCOOL

GLYCOOL units are factory-charged and tested. Field-installed piping is required from the unit to the drycooler and pump package. An additional coil is included for use when fluid temperatures are sufficiently low (below room temperature). Cooling is provided by circulating cold glycol through this second coil, reducing compressor operation.

Water-Cooled

Water-cooled units are factory-charged and tested. Field-installed water piping is required from the unit to the cooling tower.

Dual-Cool

This system has all of the features of a compressorized system, but adds a second cooling coil that is connected to a source of chilled water. Cooling is provided by circulating water through this second coil and reducing compressor operation.

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Liebert DS user manual Cooling Configurations, Air-Cooled, Glycol-Cooled, Glycool, Water-Cooled, Dual-Cool

Contents

User Manual 28-105kW, 8-30 Tons, Upflow and Downflow, 50/60Hz Liebert DSFor Business-Critical Continuity Page TABLE OF CONTENTS 1.0 LIEBERT DS COMPONENTS AND NOMENCLATURE 2.0 COOLING CONFIGURATIONS3.0 PRE-INSTALLATION GUIDELINES SAFETY INFORMATION7.0 ELECTRICAL CONNECTIONS 12.0 MAINTENANCE8.0 PIPING 13.0 HVAC MAINTENANCE CHECKLIST FIGURES compressor models all compressor models TABLES Table 43 Component weights-upflow, air-cooled, 105kW 30 ton, scroll/digital scroll compressor models SAVE THESE INSTRUCTIONS IMPORTANT SAFETY INSTRUCTIONSRisk of contact with hot surfaces. Can cause injury Risk of high-speed moving parts. Can cause injury or deathRisk of leaking water. Can cause equipment and building damage 1.0 LIEBERT DS COMPONENTS AND NOMENCLATURE Figure 1 Downflow model component locationsFigure 2 Upflow model component locations Configuration 5 A U ALiebert DS Components and Nomenclature Air Distribution2.0 COOLING CONFIGURATIONS Cooling ConfigurationsAir-Cooled Glycol-Cooled3.1 Room Preparation 3.0 PRE-INSTALLATION GUIDELINES3.2 Air Distribution-Downflow Units Figure 5 Upflow ducting configurations 3.3 Air Distribution-Upflow Units3.4 Connections and System Setup 3.5 Operating Conditions4.0 LIEBERT DS DIMENSIONS AND WEIGHTS Liebert DS Dimensions and WeightsDownflow Unit Weight, lb Upflow Unit Weight, lbTop View Front ViewTop View Top View Front ViewDPN000924 Rev Air-Cooled2350 2400Figure 10 Cabinet and floor planning dimensions-downflow, air-cooled, 53-77kW 15-22 ton, scroll compressor models Front ViewTOP VIEW FRONT VIEWTop View Weights for downflow, air-Cooled, 105kW 30 ton, all compressor modelsFront View Top View Figure 13 Cabinet and floor planning dimensions-downflow, water/glycol/GLYCOOL, 105kW 30 ton, all compressor modelsFront View Top View Figure 14 Cabinet and floor planning dimensions-upflow, air-cooled 28-42kW 8-12 ton, semi-hermetic compressor modelsFront View Figure 15 Cabinet and floor planning dimensions-upflow, air-cooled 28-42kW 8-12 ton, scroll or digital scroll compressor models FRONT VIEW Front View Top View838mm Top View Figure 18 Cabinet and floor planning dimensions-upflow, air-cooled, 53-77kW 15-22 ton, scroll or digital scroll compressor modelsFront View Front View Table 17 Weights-upflow, air-cooled, 105kW 30 ton, all Liebert DS Dimensions and WeightsDry Weight, Approximate, lb kg TOP VIEWLiebert DS Dimensions and Weights TOP VIEWFRONT VIEW ModelLiebert DS Dimensions and Weights Dimensions, in. mmModel Height, in. mmLiebert DS Dimensions and Weights Dimensions, in. mmModel Height, in. mmFigure 24 Floor stand dimensions-downflow, 105kW 30 ton models Liebert DS Dimensions and WeightsHeight, in. mm D turning vaneFigure 25 Blower outlet and deck dimensions-upflow, 28-42kW 8-12 ton Table 22 Dimensions for upflow, 28-42kW 8-12 tonBlower Outlet Location - Top View Top of UnitBlower outlet and deck dimensions-upflow, 53-77kW 15-22 ton Table 24 Blower outlet and deck dimensions-upflow 105kW 30ton Figure 27 Blower outlet and deck dimensions-upflow 105kW 30ton1-1/2 38mm Table 25 Rear return filter box dimensions Figure 28 Rear return filter box dimensionsDPN001196 Rev Figure 29 Upflow unit plenum dimensions Table 26 Upflow unit plenum dimensionsCheck One Side View - Unit5.1 Packaging Material SAFETY INFORMATION5.0 EQUIPMENT INSPECTION AND HANDLING Forklift PalletSpreader Bars and Slings Jack5.2.1 Removing the Unit from the Skid With a Forklift Figure 32 Remove the unit from the skidFigure 33 Moving the unit to its installation location 5.2.2 Moving the Unit to the Installation Location with Piano Jacks5.2.3 Removing Piano Jacks 5.2.4 Removing Liebert DS from Skid Using Rigging LiftingFigure 35 Using rigging to lift Liebert DS off skid LiftingLifting Sling5.4 Placing the Unit on a Floor Stand 5.3 Semi-Hermetic Compressor Spring Isolation SystemDETAIL A 6.1 Required Equipment 6.2 Disassembly-Downflow Units6.0 DISASSEMBLING THE LIEBERT DS FOR TRANSPORT 10. Reheat-Optional Component 11. Humidifier-Optional Component12. Condensate Pump-Optional Component 13. GLYCOOL/Dual-Cool-Optional Component6.2.1 Remove the Compressor Assembly 6.2.2 Remove the Filter and Electric Box AssemblyEmerson recommends using piano jacks when moving this section Emerson does not recommend unsweating refrigerant connections6.3 Reassembly-Downflow Units 6.3.1 Reconnecting Piping, Charging and Replacing Panels6.4 Reassembly Checklist Compressor Assembly Filter & Electric Box AssemblyBlower & Coil Assembly 60-3/16Filter & Electric Box Assembly Figure 39 Component dimensions-downflow, water/glycol/GLYCOOL, 28-42kW 8-12 ton, all compressor models 59-7/16 1509mm 1509mm 940mmFigure 42 Component dimensions-downflow water/glycol, GLYCOOL, 53-77kW 15-22 ton, all compressor models Figure 43 Component dimensions-downflow, air-cooled, 105kW 30 ton, semi-hermetic compressor models See disassembly and handling instructions in installation manual Figure 45 Component dimensions-downflow, water/glycol/GLYCOOL, 105kW 30 ton, all compressor models 6.5 Disassembly-Upflow Units Emerson does not recommend unsweating refrigerant connections6.5.2 Remove Blower and Electric Box Assembly 6.5.1 Remove Compressor AssemblyEmerson recommends using piano jacks when moving this section 6.6 Reassembly-Upflow Unit 6.7 Reassembly ChecklistFigure 46 Component dimensions-upflow, air-cooled, 28-42kW 8-12 ton, semi-hermetic compressor models Figure 47 Component dimensions-upflow, air-cooled, 28-42kW 8-12 ton, scroll/digital scroll compressor models Figure 48 Component dimensions-upflow, water/glycol/GLYCOOL, 28-42kW 8-12 ton, all compressor models 2083mm 660mm108 2743mm Assembled Length Figure 50 Component dimensions-upflow, air-cooled, 53-77kw 15-22 ton, scroll/digital scroll compressor models Figure 51 Component dimensions-upflow water/glycol/GLYCOOL 53-77kw 15-22 ton, all compressor models Figure 52 Component dimensions-upflow, air-cooled, 105kW 30 ton, semi-hermetic compressor models Figure 53 Component dimensions-upflow, air-cooled, 105kW 30 ton, scroll/digital scroll compressor models 31-1/4 794mm 7.0 ELECTRICAL CONNECTIONS Electrical ConnectionsDOWNFLOW LOW VOLT SECTION Electrical ConnectionsA B C D OVERLOAD PROTECTORS12. Factory installed disconnect switch 13. Secondary disconnect switch and earth ground7.1 Electrical Field Connection Descriptions Standard Electrical ConnectionsOptional Low Voltage Terminal Package Connections 8.1.1 Condensate Piping-Field-Installed 8.1 Fluid Connections8.0 PIPING Gravity DrainCORRECT INCORRECTINCORRECT DPN001556 DOWNFLOW DS UNIT8.1.2 Humidifier Supply Water-Optional Infrared 8.1.3 Requirements of Systems Using Water or GlycolGeneral Guidelines 8.2 Refrigeration Piping Leak Checking of Unit and Field Piping8.2.1 Piping Guidelines-Air-Cooled Units 11.7 8.3 Dehydration/Leak Test and Charging Procedures for R-407C and R-22 Fan Speed Control Leak Check and Evacuation ProcedureFan Speed Control Piping Fan Speed Control Materials SuppliedTable 49 Fan speed suction pressure transducer settings Fan Speed ChargingLee-Temp Piping Lee-Temp Leak Check and Evacuation ProcedureLee-Temp Controlled Materials Supplied Table 50 Lee-Temp suction pressure transducer settings Lee-Temp ChargingLee-Temp Receiver Refrigerant Level Sight Glass Levels9.0 PIPING SCHEMATICS Valve Liquid ReturnLee-Temp LiquidLiquid Return Lee-TempFan Speed LiquidPiping schematic-water/glycol, semi-hermetic compressor models refer to 12.11.3 - Drycooler SettingsFor systems with drycoolers Liebert DS UnitFigure 60 Piping schematic-water/glycol with scroll compressor models Piping SchematicsFor systems with drycoolers refer to 12.11.3 - Drycooler Settings LIEBERTFigure 61 Piping schematic-GLYCOOL semi-hermetic compressor models Piping SchematicsFor systems with drycoolers refer to 12.11.3 - Drycooler Settings LIEBERTFigure 62 Piping schematic-GLYCOOL with scroll compressor models Piping SchematicsFor systems with drycoolers refer to 12.11.3 - Drycooler Settings LIEBERTPiping Schematics CUSTOMER HEAT REJECTIONLIEBERT HEAT REJECTIONPiping Schematics LIEBERTHEAT REJECTION LIEBERT DS UNIT and associated pipingFigure 65 Optional piping schematic for Econ-O-Coil DPN000805 RevFront View Section A-AFRONT OF UNIT DPN000803Note Drawing not to scale E1 E2 Piping Schematics Connection Size / OpeningPoint DescriptionPiping Schematics Connection Size / OpeningPoint Description16-1/16 DPN000933408mm DPN001014 Rev HUM E1 E2 Front of UnitLV1 LV2 LV3 14-1/2 Piping Schematics Connection Size / OpeningPoint DescriptionPiping Schematics FRONT SECTION VIEWConnection Size / Opening PointPiping Schematics Left Side Section ViewTop View of Unit Front Section ViewPiping Schematics TOP VIEW OF UNITFRONT SECTION VIEW OF UNIT Left Front Panel Not ShownPiping Schematics Front Section ViewConnection Size / Opening PointPiping Schematics 2. Tolerance on all piping dimensions is ±1/2 13mmTop View Left Side Section ViewPiping Schematics TOP VIEW OF UNITLEFT SIDE SECTION VIEW OF UNIT FRONT SECTION VIEW OF UNITFigure 81 Primary connection locations-upflow, water/glycol/GLYCOOL, 105kW 30 ton, all 10.0 CHECKLIST FOR COMPLETED INSTALLATION 10.1 Moving and Placing Equipment10.2 Electrical 10.3 PipingPage 11.2 Startup Checks Inspection With Panels Removed and Disconnect Off 11.3 Commissioning Procedure With Panels On Return Completed Startup Form to Your Local Emerson Sales Office12.0 MAINTENANCE 12.1 Filters12.1.1 Filter Replacement Procedure-Downflow Units 12.1.2 Filter Replacement Procedure-Upflow Units12.2 Blower Drive System Do Not Use12.2.1 Upflow Motor Access 12.2.3 Belt Installation and TensioningFigure 83 Upflow motor access 12.2.2 Belt RemovalBlower Bearing Maintenance Blower Bearing ReplacementBlower Bearing Inspection Blower MotorCorrect Switch Orientation Incorrect Switch Orientation 12.3.2 Cleaning Humidifier Pan and Float Switch12.3 Humidifier 12.3.1 Infrared Humidifier12.4 Condensate Drain and Condensate Pump Systems 12.3.3 Changing Humidifier Lamps12.4.1 Condensate Drain 12.4.2 Condensate Pump12.5 Air-Cooled Condenser and Drycoolers 12.6 Reheat-Electric Reheat Three-Stage and SCR12.7 Compressor 12.7.1 Compressor Oil12.8 Compressor Replacement 12.9 Facility Fluid and Piping Maintenance12.8.3 Compressor Replacement Procedure 12.8.1 Compressor Motor Burnout12.10.1 Cleaning Instructions Adjustment-Johnson Controls/Penn Johnson Valves12.10 Paradenser-Water-Cooled Condenser 12.11 Water/Glycol Control ValvesTesting Function of Valve AdjustmentLocation 12.11.2Motor Ball Valve-Digital Scroll Compressors12.11.3Drycooler Settings Table 58 Aquastat settings-two-fan through four-fan drycoolersTable 59 Aquastat settings-six-fan drycoolers Table 60 Aquastat settings-eight-fan drycoolers13.0 HVAC MAINTENANCE CHECKLIST FiltersBlower Section ReheatCondensate Pump Refrigeration PipingWater-Cooled Condensers Compressor SectionAir-Cooled Condenser / Drycooler Glycol PumpPage Ensuring The High Availability Of Mission-Critical Data And Applications