Emerson Liebert ICOM-DO Installation Manual Page 1

Precision CoolingFor Business-Critical Continuity™Liebert® CRV™Installation, Operation and Maintenance Manual–60Hz, Air-Cooled, Water/Glycol-Cooled an

Liebert CRV Component Location4Figure 3 Component location - Liebert CR035, CR020 water/glycol-cooled unitsFigure 4 Component location - Liebert CR040

Introduction52.0 INTRODUCTION2.1 Product DescriptionThe Liebert CRV is a precision cooling unit available in compressorized (air-, water-, or glycol-c

Inspection and Unpacking63.0 INSPECTION AND UNPACKINGNOTICERisk of overhead interference. Can cause unit and/or structural damage.The unit may be too

Inspection and Unpacking7• Always keep the packaged Liebert CRV upright and never leave it outdoors.• If possible, transport the Liebert CRV using a f

Inspection and Unpacking83.2.1 Handling the Unit While it is PackagedFigure 7 Recommended unit handling equipment• If possible, transport the packaged

Inspection and Unpacking93.4 Removing the Unit from the Pallet Using Piano Jacks1. Remove the 16 lag bolts that secure the four top deck boards, two o

Inspection and Unpacking103.5 Removing the Piano Jacks1. Remove the piano jack strapping and pull the piano jacks away from the unit.2. Remove all mat

Prepare the Liebert CRV for Installation114.0 PREPARE THE LIEBERT CRV FOR INSTALLATION1. Using a screwdriver, open the electrical panel and the lower

Prepare the Liebert CRV for Installation124.1 Adjust Baffles to Direct Air ProperlyAdjust the front panel baffles before startup to ensure the cooling

Liebert iCOM Control135.0 LIEBERT ICOM CONTROLThe Liebert CRV is equipped with the most advanced Liebert iCOM control system. Each Liebert CRV contain

MODEL NUMBER NOMENCLATURE - 25 DIGIT CONFIGURATION NUMBER* The 14-digit model number consists of the first 10 digits and last four digits of the Confi

Liebert iCOM Control14Figure 13 Liebert iCOM menu components for Liebert CRVSupply Temperatureand HumidityLast Two Events, Warnings or AlarmsIndividua

Liebert iCOM Control155.2 Liebert iCOM Remote Rack Sensor ConfigurationThere are two steps to setting up a remote rack sensor:• The DIP switches of th

Liebert iCOM Control165.2.1 Setting the Remote Rack Sensor AddressRemove the cap on the rear of the plastic sensor housing. This cap protects the swit

Liebert iCOM Control17Figure 15 Remote rack sensor termination jumper5.2.3 Sensor Setup ConfirmationIf the sensor has been set up correctly and is com

Liebert iCOM Control185.3 Wiring for Unit-to-Unit Communications—U2UCooling units come from the factory-wired and configured for stand-alone operation

Liebert iCOM Control19Figure 17 U2U network setup diagramWall-Mount Large DisplayOnly large displays can be used for remotely monitoring and controlli

Liebert iCOM Control20Figure 18 Wiring a large display for U2U network operationLiebert vNSAThe Liebert vNSA is designed to connect multiple Liebert i

Liebert iCOM Control21Figure 19 Liebert vNSA with optional remote large displayTable 6 Ports available for connecting Liebert iCOM control devicesMode

Liebert iCOM Control225.3.2 Remote Rack Sensor Operation and Rack View SetupFigure 20 Rack setup screen, page 1 of 3Once the remote rack sensors have

Liebert iCOM Control23Figure 22 Rack setup screen, page 3 of 3Once a sensor has been assigned to either control or display its temperature data, a cus

iTABLE OF CONTENTS1.0 LIEBERT CRV COMPONENT LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32.0 INTRODUCTION

Liebert iCOM Control245.4 Liebert iCOM Control SetupThe Liebert iCOM on the Liebert CRV leaves the factory with the fan speed and cooling capacity con

Liebert iCOM Control255.5 Alarms/EventsThe following alarms and events are supported by the Liebert iCOM control on the Liebert CRV.Unit On / Off Unit

Piping266.0 PIPINGAll fluid and refrigeration connections to the unit, with the exception of the condensate drain, are sweat copper. Factory-installed

Piping27Figure 25 Gravity drainCondensate Pump• 1/2" copper sweat connection is provided on units with optional factory-installed condensate pump

Piping28General Guidelines• Equipment damage and personal injury can result from improper piping installation, leak check-ing, fluid chemistry and flu

Refrigerant Connections297.0 REFRIGERANT CONNECTIONSNOTICERisk of oil contamination with water. Can cause equipment damage.The piping must not be open

Refrigerant Connections307.2 Refrigerant Piping—Air-Cooled ModelsFigure 26 Top refrigerant piping connections Figure 27 Bottom refrigerant piping conn

Refrigerant Connections31Figure 28 Bottom entry connection dimensionsFRONT5-1/8"(130mm)12-3/4"(324.5mm)7-11/16"(195.5mm)3-1/8"(80m

Refrigerant Connections327.2.1 General layoutFigure 29 Recommended piping diagram1. Piping must be Type ACR copper tubing.The diameter required is sta

Refrigerant Connections33Table 8 Condenser positioningCondenserPositionCondenser AboveLiebert CRVCondenser andLiebert CRVat Same LevelCondenser BelowL

ii8.4 Chilled Water Connections: Chilled Water Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 409.0 ELECTRICAL CONNECTIONS

Refrigerant Connections347.2.2 Pipe Diameter and ThicknessFigure 30 Piping and refrigerant sizes for Liebert Lee-temp condensers with R-410AFigure 31

Refrigerant Connections357.2.3 Installing PipingThe following operations must be carried out by an experienced refrigeration technician.NOTICERisk of

Refrigerant Connections367.3 Vacuum and Refrigerant ChargeNOTICERisk of improper refrigerant charge. Can cause equipment damage and reduced efficiency

Refrigerant Connections37Variable Fan Speed Charging1. Check unit nameplate for refrigerant type to be used. Unit control configurations differ depend

Water Connections388.0 WATER CONNECTIONSFigure 33 Top connections8.1 Water Connections—Supply Humidifier and Drain Water, All ModelsUnits with a conde

Water Connections39• Condensate drain without pump:• Use tubing rated to carry water up to 212°F (100°C) copper, PVC or flexible polythene tubing. • A

Water Connections408.4 Chilled Water Connections: Chilled Water UnitsFigure 35 Chilled water connectionsRefer to Figure 36 when performing these insta

Water Connections41Figure 37 Bottom entry dimensions—piping and electrical openingsFigure 38 Recommended drycooler Installation FRONT5-1/8"(130mm

Electrical Connections429.0 ELECTRICAL CONNECTIONS9.1 Electrical connectionsFigure 39 Remove electrical panel and lower front panel]Figure 40 Power an

Electrical Connections439.1.1 Power Supply Cable Connections• Connect the cable to the line inlet terminal board.• Use the appropriate cable size for

iiiE.1 Standard Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74E.2 Optional El

Electrical Connections449.3 Protective Features of Electrical HeatersFigure 41 Electrical heating with temperature sensor protectionWhen the temperatu

Electrical Connections45Positioning the 2T Sensor Rack Probes on a RackTo help ensure proper cooling, use the following guidelines to place the Lieber

Electrical Connections46Figure 42 Temperature sensor placement, cabling and chain configuration

Startup4710.0 STARTUP10.1 Initial StartupTo start the Liebert CRV:1. Open all valves in the refrigeration circuit according to the instruction label a

Startup48Checks to Perform after StartupOnce the system is operating under load, check the various components, as follows:1. Verify that the fans are

Startup4910.3 Chilled Water Valve: Chilled Water ModelsThe 3-way valve controls the chilled water flow and operates as follows (refer to Figure 4):• W

Operation5011.0 OPERATIONUnit operation is completely automatic. The unit operates in the following sequence:• Air is drawn into the unit by the fans,

Calibration and Regulation after Startup5112.0 CALIBRATION AND REGULATION AFTER STARTUPThe Liebert CRV has been factory-tested and calibrated, but it

Maintenance5213.0 MAINTENANCE13.1 Safety InstructionsAll maintenance operations must strictly observe national, state and local accident prevention re

Maintenance5313.4 Inspect and Replace the Air FilterCheck the air filter monthly to maintain efficient air distribution through the evaporator coil.1.

ivFigure 46 Air filter location and input power safety switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53Figure 4

Maintenance54Figure 48 Differential pressure switch tubesBefore restarting the unit, be sure that the microswitches are properly closed; otherwise, th

Maintenance5513.7 Electrical Heaters1. Inspect and clean reheat elements.2. Inspect and tighten support hardware. Table 12 Maintenance scheduleCompone

Maintenance5613.8 Dismantling the UnitThe Liebert CRV has been designed and built to ensure continuous operation.The working life of some of the main

Maintenance57• Additional information located in a dedicated label of the unit (Reg. 1494/2007):a. Where fluorinated greenhouse gas is foreseen to be

Troubleshooting5814.0 TROUBLESHOOTINGTable 13 Unit diagnosticsProblem Possible Cause Corrective ActionRack temperatureis too highDirty filters Replace

Humidifier59APPENDIX A-HUMIDIFIERA.1 PRINCIPAL OF OPERATIONWhen the Liebert iCOM calls, the cylinder fills to 100% of the Full Load Amperage (FLA) or

Humidifier60NOTICERisk of improper water supply. Can reduce humidifier efficiency or obstruct humidifier plumbing.Do not use completely demineralized

Humidifier61A.1.3 Humidifier Startup and Operation• Ambient temperature location for humidifier: 41 - 104°F (5 - 40°C).• Relative humidity location fo

Humidifier62Contact Emerson or your local Emerson representative to obtain a replacement cylinder. To obtain the correct cylinder, supply the cylinder

Humidifier63Extended ShutdownAlways drain the cylinder before disconnecting power to the humidifier for a period of extended shut-down. Otherwise, the

1IMPORTANT SAFETY INSTRUCTIONSSAVE THESE INSTRUCTIONSThis manual contains important safety instructions that should be followed during the installatio

Humidifier64Approximately 30 seconds after the contactor pulls in, the fill valve coil should energize. There is also a visible fill relay on the prin

Humidifier65Table 14 Humidifier troubleshootingUnit Status Lamp Symptom Corrective actions Yellow Green On OnMaximum water level inside cylinder.This

Electrical Data66APPENDIX B-ELECTRICAL DATATable 15 Liebert CRV electrical data - 60Hz (Amps)VoltageAir-Cooled Units Water/ Glycol-Cooled Units Chille

Electrical Data67Topping up is requested for short pipeline, too, due to the extra-charge of refrigerant.The air conditioner is supplied pressurized w

Installation Drawings68APPENDIX C-INSTALLATION DRAWINGSFigure 54 Overall dimensions / service areaTable 21 Dry weight, all model types, ± 5%Model No.M

Installation Drawings69Figure 55 Raised-floor cutouts for piping and electrical connections FRONT5-1/8"(130mm)12-3/4"(324.5mm)7-11/16"(

Installation Drawings70Figure 56 Air bleeding valve position CWFigure 57 Electrical connections - entryREAR VIEWFRONTTOP INLETBOTTOM INLET(possible wi

Refrigerant, Hydraulic and Electrical Connections71APPENDIX D-REFRIGERANT, HYDRAULIC AND ELECTRICAL CONNECTIONSFigure 58 Connections—air-cooled models

Refrigerant, Hydraulic and Electrical Connections72Figure 59 Connections—water/glycol modelsTable 23 Unit connections, water/glycol-cooled modelsUNIT

Refrigerant, Hydraulic and Electrical Connections73Figure 60 Connections—chilled water modelsTable 24 Unit connections, chilled water modelsUNIT CONNE

2!WARNINGRisk of electrical shock. Can cause injury and death.Disconnect local and remote power supplies before working within.Before proceeding with

Electrical Field Connections Descriptions74APPENDIX E-ELECTRICAL FIELD CONNECTIONS DESCRIPTIONSE.1 STANDARD ELECTRICAL CONNECTIONS1. High-voltage entr

Electrical Field Connections Descriptions75Figure 61 Electrical field connectionsTop of Liebert CRVOverload ProtectionContactorsEarthGroundLow-Voltage

Refrigeration & Hydraulic Circuits76APPENDIX F-REFRIGERATION & HYDRAULIC CIRCUITSFigure 62 General arrangement—air-cooled unitsDPN001984Rev. 0

Refrigeration & Hydraulic Circuits77Figure 63 General arrangement—water-glycol unitsMCWater/Glycol Outlet(bottom connections)Water/Glycol Outlet(t

Refrigeration & Hydraulic Circuits78Figure 64 General arrangement—chilled water

Refrigeration & Hydraulic Circuits79NOTES

Refrigeration & Hydraulic Circuits80

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Liebert CRV Component Location31.0 LIEBERT CRV COMPONENT LOCATIONFigure 1 Component location, common components—All modelsFigure 2 Component location