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Liebert DS user manual Liquid Return, Lee-Temp, Fan Speed, Suction, Compressor Valve

Models: DS

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Liquid Return

				Piping Schematics
Figure 58 Piping schematic—air-cooled, scroll compressor models
	Check	Relief	Service
	Check	Valve	Service
Inverted trap on discharge & liquid	Valve		Valve	Liquid Return
lines to extend above base of coil				Head Pressure
by a minimum of 7-1/2” (190mm).		Lee-Temp Receiver		Head Pressure
		Lee-Temp Receiver		Control Valve
Fusible
Plug
Condenser Coil	Condenser Coil
(Fan Speed )		(Lee-Temp)
			Hot Gas
	Lee-Temp		Discharge
Fan Speed	(Required with Digital Scroll)
Fan Speed

Liquid

* Traps every

28-42kW Digital Solenoid Valve

Sensing

Evaporator Coil

25ft (7.6m)

Bulb

of rise

53-70kW Digital

Solenoid Valve

Suction

Service

Service

Field installed relief valve (s) required

Valve

External

for 50 Hz EU CE units rated

Compressor Valve

Equalizer

maximum 480 PSIG (33 Bar).

Check

* Isolation

Valve

valve

Hot Gas Discharge

Expansion

Solenoid

Sight Glass

Filter Dryer

Liquid Return

* Isolation

Valve

Valve

valve

Refrigerant Piping

* Components are not supplied by

Field Piping

Liebert, but are recommended

for proper circuit operation and

Service/Schrader (Access) Connection No Valve Core

maintenance.

Service/Schrader (Access) Connection With Valve Core

Note: Schematic representation shown . Do not use for specific connection locations.

DPN000798

Two refrigeration circuits provided . Single refrigeration circuit shown for clarity .

Rev. 2

83

Image 93

Liebert DS user manual Liquid Return, Lee-Temp, Fan Speed, Suction, Compressor Valve

Contents

Liebert DS User Manual 28-105kW, 8-30 Tons, Upflow and Downflow, 50/60HzFor Business-Critical Continuity Page 1.0 LIEBERT DS COMPONENTS AND NOMENCLATURE 2.0 COOLING CONFIGURATIONS TABLE OF CONTENTS3.0 PRE-INSTALLATION GUIDELINES SAFETY INFORMATION12.0 MAINTENANCE 7.0 ELECTRICAL CONNECTIONS8.0 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 IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONSRisk of high-speed moving parts. Can cause injury or death Risk of contact with hot surfaces. Can cause injuryRisk of leaking water. Can cause equipment and building damage Figure 1 Downflow model component locations 1.0 LIEBERT DS COMPONENTS AND NOMENCLATUREFigure 2 Upflow model component locations 5 A U A ConfigurationLiebert DS Components and Nomenclature Air DistributionCooling Configurations 2.0 COOLING CONFIGURATIONSAir-Cooled Glycol-Cooled3.0 PRE-INSTALLATION GUIDELINES 3.1 Room Preparation3.2 Air Distribution-Downflow Units 3.3 Air Distribution-Upflow Units Figure 5 Upflow ducting configurations3.5 Operating Conditions 3.4 Connections and System SetupLiebert DS Dimensions and Weights 4.0 LIEBERT DS DIMENSIONS AND WEIGHTSDownflow Unit Weight, lb Upflow Unit Weight, lbFront View Top ViewTop View Front View Top ViewAir-Cooled DPN000924 Rev2350 2400Front View Figure 10 Cabinet and floor planning dimensions-downflow, air-cooled, 53-77kW 15-22 ton, scroll compressor modelsFRONT VIEW TOP VIEWWeights for downflow, air-Cooled, 105kW 30 ton, all compressor models Top ViewFront View Figure 13 Cabinet and floor planning dimensions-downflow, water/glycol/GLYCOOL, 105kW 30 ton, all compressor models Top ViewFront View Figure 14 Cabinet and floor planning dimensions-upflow, air-cooled 28-42kW 8-12 ton, semi-hermetic compressor models Top ViewFront View Figure 15 Cabinet and floor planning dimensions-upflow, air-cooled 28-42kW 8-12 ton, scroll or digital scroll compressor models FRONT VIEW Top View Front View838mm Figure 18 Cabinet and floor planning dimensions-upflow, air-cooled, 53-77kW 15-22 ton, scroll or digital scroll compressor models Top ViewFront View Front View Liebert DS Dimensions and Weights Table 17 Weights-upflow, air-cooled, 105kW 30 ton, allDry Weight, Approximate, lb kg TOP VIEWTOP VIEW Liebert DS Dimensions and WeightsFRONT VIEW ModelDimensions, in. mm Liebert DS Dimensions and WeightsModel Height, in. mmDimensions, in. mm Liebert DS Dimensions and WeightsModel Height, in. mmLiebert DS Dimensions and Weights Figure 24 Floor stand dimensions-downflow, 105kW 30 ton modelsHeight, in. mm D turning vaneTable 22 Dimensions for upflow, 28-42kW 8-12 ton Figure 25 Blower outlet and deck dimensions-upflow, 28-42kW 8-12 tonBlower Outlet Location - Top View Top of UnitBlower outlet and deck dimensions-upflow, 53-77kW 15-22 ton Figure 27 Blower outlet and deck dimensions-upflow 105kW 30ton Table 24 Blower outlet and deck dimensions-upflow 105kW 30ton1-1/2 38mm Figure 28 Rear return filter box dimensions Table 25 Rear return filter box dimensionsDPN001196 Rev Table 26 Upflow unit plenum dimensions Figure 29 Upflow unit plenum dimensionsCheck One Side View - UnitSAFETY INFORMATION 5.1 Packaging Material5.0 EQUIPMENT INSPECTION AND HANDLING Pallet ForkliftSpreader Bars and Slings JackFigure 32 Remove the unit from the skid 5.2.1 Removing the Unit from the Skid With a Forklift5.2.2 Moving the Unit to the Installation Location with Piano Jacks Figure 33 Moving the unit to its installation location5.2.3 Removing Piano Jacks Lifting 5.2.4 Removing Liebert DS from Skid Using RiggingLifting Figure 35 Using rigging to lift Liebert DS off skidLifting Sling5.3 Semi-Hermetic Compressor Spring Isolation System 5.4 Placing the Unit on a Floor StandDETAIL A 6.2 Disassembly-Downflow Units 6.1 Required Equipment6.0 DISASSEMBLING THE LIEBERT DS FOR TRANSPORT 11. Humidifier-Optional Component 10. Reheat-Optional Component12. Condensate Pump-Optional Component 13. GLYCOOL/Dual-Cool-Optional Component6.2.2 Remove the Filter and Electric Box Assembly 6.2.1 Remove the Compressor AssemblyEmerson recommends using piano jacks when moving this section Emerson does not recommend unsweating refrigerant connections6.3.1 Reconnecting Piping, Charging and Replacing Panels 6.3 Reassembly-Downflow Units6.4 Reassembly Checklist Filter & Electric Box Assembly Compressor 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 940mm 1509mmFigure 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 Emerson does not recommend unsweating refrigerant connections 6.5 Disassembly-Upflow Units6.5.1 Remove Compressor Assembly 6.5.2 Remove Blower and Electric Box AssemblyEmerson recommends using piano jacks when moving this section 6.7 Reassembly Checklist 6.6 Reassembly-Upflow UnitFigure 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 660mm 2083mm108 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 Electrical Connections 7.0 ELECTRICAL CONNECTIONSElectrical Connections DOWNFLOW LOW VOLT SECTIONA B C D OVERLOAD PROTECTORS13. Secondary disconnect switch and earth ground 12. Factory installed disconnect switch7.1 Electrical Field Connection Descriptions Standard Electrical ConnectionsOptional Low Voltage Terminal Package Connections 8.1 Fluid Connections 8.1.1 Condensate Piping-Field-Installed8.0 PIPING Gravity DrainINCORRECT CORRECTINCORRECT DPN001556 DOWNFLOW DS UNIT8.1.3 Requirements of Systems Using Water or Glycol 8.1.2 Humidifier Supply Water-Optional InfraredGeneral Guidelines Leak Checking of Unit and Field Piping 8.2 Refrigeration Piping8.2.1 Piping Guidelines-Air-Cooled Units 11.7 Fan Speed Control Leak Check and Evacuation Procedure 8.3 Dehydration/Leak Test and Charging Procedures for R-407C and R-22Fan Speed Control Piping Fan Speed Control Materials SuppliedFan Speed Charging Table 49 Fan speed suction pressure transducer settingsLee-Temp Leak Check and Evacuation Procedure Lee-Temp PipingLee-Temp Controlled Materials Supplied Lee-Temp Charging Table 50 Lee-Temp suction pressure transducer settingsLee-Temp Receiver Refrigerant Level Sight Glass LevelsValve Liquid Return 9.0 PIPING SCHEMATICSLee-Temp LiquidLee-Temp Liquid ReturnFan Speed Liquidrefer to 12.11.3 - Drycooler Settings Piping schematic-water/glycol, semi-hermetic compressor modelsFor systems with drycoolers Liebert DS UnitPiping Schematics Figure 60 Piping schematic-water/glycol with scroll compressor modelsFor systems with drycoolers refer to 12.11.3 - Drycooler Settings LIEBERTPiping Schematics Figure 61 Piping schematic-GLYCOOL semi-hermetic compressor modelsFor systems with drycoolers refer to 12.11.3 - Drycooler Settings LIEBERTPiping Schematics Figure 62 Piping schematic-GLYCOOL with scroll compressor modelsFor systems with drycoolers refer to 12.11.3 - Drycooler Settings LIEBERTCUSTOMER HEAT REJECTION Piping SchematicsLIEBERT HEAT REJECTIONLIEBERT Piping SchematicsHEAT REJECTION LIEBERT DS UNIT and associated pipingDPN000805 Rev Figure 65 Optional piping schematic for Econ-O-CoilSection A-A Front ViewFRONT OF UNIT DPN000803Note Drawing not to scale E1 E2 Connection Size / Opening Piping SchematicsPoint DescriptionConnection Size / Opening Piping SchematicsPoint DescriptionDPN000933 16-1/16408mm HUM E1 E2 Front of Unit DPN001014 RevLV1 LV2 LV3 14-1/2 Connection Size / Opening Piping SchematicsPoint DescriptionFRONT SECTION VIEW Piping SchematicsConnection Size / Opening PointLeft Side Section View Piping SchematicsTop View of Unit Front Section ViewTOP VIEW OF UNIT Piping SchematicsFRONT SECTION VIEW OF UNIT Left Front Panel Not ShownFront Section View Piping SchematicsConnection Size / Opening Point2. Tolerance on all piping dimensions is ±1/2 13mm Piping SchematicsTop View Left Side Section ViewTOP VIEW OF UNIT Piping SchematicsLEFT SIDE SECTION VIEW OF UNIT FRONT SECTION VIEW OF UNITFigure 81 Primary connection locations-upflow, water/glycol/GLYCOOL, 105kW 30 ton, all 10.1 Moving and Placing Equipment 10.0 CHECKLIST FOR COMPLETED INSTALLATION10.2 Electrical 10.3 PipingPage 11.2 Startup Checks Inspection With Panels Removed and Disconnect Off Return Completed Startup Form to Your Local Emerson Sales Office 11.3 Commissioning Procedure With Panels On12.1 Filters 12.0 MAINTENANCE12.1.2 Filter Replacement Procedure-Upflow Units 12.1.1 Filter Replacement Procedure-Downflow Units12.2 Blower Drive System Do Not Use12.2.3 Belt Installation and Tensioning 12.2.1 Upflow Motor AccessFigure 83 Upflow motor access 12.2.2 Belt RemovalBlower Bearing Replacement Blower Bearing MaintenanceBlower Bearing Inspection Blower Motor12.3.2 Cleaning Humidifier Pan and Float Switch Correct Switch Orientation Incorrect Switch Orientation12.3 Humidifier 12.3.1 Infrared Humidifier12.3.3 Changing Humidifier Lamps 12.4 Condensate Drain and Condensate Pump Systems12.4.1 Condensate Drain 12.4.2 Condensate Pump12.6 Reheat-Electric Reheat Three-Stage and SCR 12.5 Air-Cooled Condenser and Drycoolers12.7 Compressor 12.7.1 Compressor Oil12.9 Facility Fluid and Piping Maintenance 12.8 Compressor Replacement12.8.3 Compressor Replacement Procedure 12.8.1 Compressor Motor BurnoutAdjustment-Johnson Controls/Penn Johnson Valves 12.10.1 Cleaning Instructions12.10 Paradenser-Water-Cooled Condenser 12.11 Water/Glycol Control ValvesAdjustment Testing Function of ValveLocation 12.11.2Motor Ball Valve-Digital Scroll CompressorsTable 58 Aquastat settings-two-fan through four-fan drycoolers 12.11.3Drycooler SettingsTable 59 Aquastat settings-six-fan drycoolers Table 60 Aquastat settings-eight-fan drycoolersFilters 13.0 HVAC MAINTENANCE CHECKLISTBlower Section ReheatRefrigeration Piping Condensate PumpWater-Cooled Condensers Compressor SectionGlycol Pump Air-Cooled Condenser / DrycoolerPage Of Mission-Critical Data And Applications Ensuring The High Availability