Emerson Liebert CW User Manual

Precision CoolingFor Business-Critical Continuity™Liebert® CW™User Manual–26-181 kW, 7.5-52 Tons, Upflow and Downflow, 50/60HzDATA CENTER SOLUTIONSFor

Installation Guidelines42.0 INSTALLATION GUIDELINES2.1 Room Preparation• Verify that the floor is level, solid and sufficient to support the unit. See

Installation Guidelines52.3 Air Distribution—Upflow UnitsVarious configurations are available:• Front return• Rear return• Bottom return (not availabl

Installation Guidelines62.4 Connections and System Setup• Plan the routing of wiring, piping and ductwork to the unit. See Figures 27 through 33 and F

Liebert CW Dimensions and Weights73.0 LIEBERT CW DIMENSIONS AND WEIGHTSFigure 2 Cabinet and floor planning dimensions for downflow chilled water model

Liebert CW Dimensions and Weights8Figure 3 Cabinet and floor planning dimensions for downflow chilled water models CW106 and CW114 with forward-curved

Liebert CW Dimensions and Weights9Figure 4 Cabinet and floor planning dimensions for downflow chilled water models CW089, CW106 and CW114 with EC fans

Liebert CW Dimensions and Weights10Figure 5 Cabinet and floor planning dimensions for downflow chilled water models CW146 and CW181 with EC fansModelW

Liebert CW Dimensions and Weights11Figure 6 Cabinet and floor planning dimensions for upflow chilled water models CW026-CW084Model# ofBlowersDimension

Liebert CW Dimensions and Weights12Figure 7 Cabinet and floor planning dimensions for upflow chilled water models, CW106 and CW114Filter Access(Both E

Liebert CW Dimensions and Weights13Figure 8 Floor stand dimensions, optional steam, hot water reheat and humidifier piping entrances for CW026 - CW84

Liebert CW Dimensions and Weights14Figure 9 Floor stand dimensions for CW106 and CW114 models with forward-curved fansHeight, in. (mm)H* Nominal J9 (2

Liebert CW Dimensions and Weights15Figure 10 Floor stand and floor planning dimensions, downflow models CW026 - CW041 with EC fansDimension A*Height i

Liebert CW Dimensions and Weights16Figure 11 Floor stand and floor planning dimensions for downflow models CW051 and CW060 with EC fansPoint Descripti

Liebert CW Dimensions and Weights17Figure 12 Floor stand and floor planning dimensions, downflow models CW076 and CW084 with EC fansDimension A*Height

Liebert CW Dimensions and Weights18Figure 13 Floor stand and floor planning dimensions, downflow models CW089, CW106 and CW114 with EC fansNOTES1. Thi

Liebert CW Dimensions and Weights19Figure 14 Floor stand and floor planning dimensions, downflow models CW146 and CW181 with EC fansNOTE:1. This floor

Liebert CW Dimensions and Weights20Figure 15 Plenum dimensions for upflow chilled water models CW026 - CW084Plenum Height in. (mm)HJ20 (508) 1 (25)22-

Liebert CW Dimensions and Weights21Figure 16 Plenum dimensions for upflow chilled water models CW106 and CW114Plenum Height, in.(mm)KL20 (508) 1 (25)2

Liebert CW Dimensions and Weights22Figure 17 Blower duct and deck dimensions for CW106 and CW114 upflow chilled water modelsModel Blower Supply Motor

Liebert CW Dimensions and Weights23Figure 18 Filter plenum dimensions, downflow models CW146 and CW181 with EC fans24"(610mm)CW146 orCW181 base u

iTABLE OF CONTENTSIMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1SAVE T

Equipment Inspection and Handling244.0 EQUIPMENT INSPECTION AND HANDLINGUpon arrival of the unit and before unpacking it, verify that the labeled equi

Equipment Inspection and Handling25Figure 19 Equipment recommended for handling the Liebert CWIf possible, transport the Liebert CW with a forklift or

Equipment Inspection and Handling264.2.1 Removing the Unit from the Skid With a Forklift1. Align a forklift with either the front or rear side of the

Equipment Inspection and Handling274.2.2 Moving the Unit to the Installation Location with Piano Jacks1. With the Liebert CW elevated, position piano

Equipment Inspection and Handling284.2.4 Removing Liebert CW from Skid Using Rigging1. Locate the center of gravity indicator—the center of gravity va

Equipment Inspection and Handling29Figure 24 Using rigging to lift Liebert CW off skid196713Rev. 0

EC Fan—Lowering and Removing305.0 EC FAN—LOWERING AND REMOVINGLiebert CW downflow models CW106, CW114 and CW181 can be equipped with EC fans that can

EC Fan—Lowering and Removing31Figure 25 EC fan lowering procedure211B B54A3"Z" BracketSection B-BTop View of Fan Deck5SectionNot ShownSectio

EC Fan—Lowering and Removing325.2 Removing the EC FansThe EC fans in Liebert CW units can be removed for easier maintenance or for replacement.If the

EC Fan—Lowering and Removing33Figure 26 EC fan lowering and removal procedure2366758See Steps 1 and 2See Steps 4 - 7See Step 3See Step 8

ii10.0 INITIAL STARTUP PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6210.1 Additional Considera

Electrical Connections346.0 ELECTRICAL CONNECTIONS6.1 Electrical ConnectionsThree-phase electrical service is required for all models. Electrical serv

Electrical Connections35Figure 27 Electrical field connections for downflow chilled water models CW026 - CW084CDElectric service connection blockEarth

Electrical Connections36Figure 28 Electrical field connections for downflow chilled water models CW089, CW106 and CW114373824505155567778919293CDMonit

Electrical Connections37Figure 29 Electrical field connections (high voltage) for upflow chilled water models CW026 - CW084Field-supplied disconnect s

Electrical Connections38Figure 30 Electrical field connections (low voltage) for upflow chilled water models CW026 - CW084 373824507778919293575556DPN

Electrical Connections39Figure 31 Electrical field connections (high voltage) for upflow chilled water models CW106 and CW114Three-phase electricservi

Electrical Connections40Figure 32 Electrical field connections (low voltage) for upflow chilled water models CW106 and CW114373824505155567778919293CD

Electrical Connections41Figure 33 Electrical field connections for downflow chilled water models CW146 and CW181Standard Electrical Connections for Do

Electrical Connections42Optional Electrical Connections for Downflow Chilled Water Models CW146 and CW181Refer to Figure 33.9. Factory-installed disco

Electrical Connections43speed loads have on the system voltage. In these instances, an undesirable effect is a difficulty in switching from generator

iiiFigure 11 Floor stand and floor planning dimensions for downflow models CW051 and CW060 withEC fans . . . . . . . . . . . . . . . . . . . . . . .

Electrical Connections44Table 4 shows the Total Current Distortion level as measured on a single CW181 unit and is typical of what can be expected in

Piping457.0 PIPINGAll fluid connections to the unit, with the exceptions of the condensate drain and live steam, are sweat copper. Factory-installed p

Piping46Figure 34 Gravity drain for downflow and upflow unitsCORRECTINCORRECTCORRECTDOWNFLOW CW UNIT UPFLOW CW UNITUNITINTERNALDRAINEXTERNALDRAINCONTI

Piping47Condensate Pump• 1/2" copper sweat connection is provided on units with optional factory-installed condensate pump• Condensate Pump (60Hz

Piping487.2 Chilled Water Piping7.2.1 Requirements of Systems Using Water or GlycolThese guidelines apply to the field leak checking and fluid require

Piping49NOTICERisk of corrosion. Can cause equipment damage.Read and follow individual unit installation instructions for precautions regarding fluid

Piping Schematics508.0 PIPING SCHEMATICSFigure 35 Chilled water downflow general arrangement*Components are not supplied by Liebert butare recommended

Piping Schematics51Figure 36 Piping connections for downflow chilled water models CW026 - CW084 with forward-curved fansModelsA(OD Cu)B(OD Cu)C(NPT Ma

Piping Schematics52Figure 37 Piping connections for downflow chilled water models CW106 and CW114 with forward-curved fansModelNumbersPiping Connectio

Piping Schematics53Figure 38 Primary connection locations, downflow models CW026 - CW041 with EC fansPoint Description X, in (mm) Y, in (mm) Connectio

ivTABLESTable 1 Unit dimensions and weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Piping Schematics54Figure 39 Primary connection locations, downflow models CW051 and CW060 with EC fansPoint Description X, in (mm) Y, in (mm) Connect

Piping Schematics55Figure 40 Primary connection locations, downflow models CW076 - CW084 with EC FansPoint Description X, in (mm) Y, in (mm) Connect

Piping Schematics56Figure 41 Primary connection locations, downflow models CW089, CW106 and CW114 with EC fansPoint Description X, in. (mm) Y, in. (

Piping Schematics57Figure 42 Primary connection locations, downflow models CW146 and CW181 with EC fansPoint DescriptionXInches (mm)YInches (mm)Connec

Piping Schematics58Figure 43 Chilled water upflow general arrangementChilledWaterSupplyChilledWater SupplyChilledWaterReturnChilledWaterReturnShutoff

Piping Schematics59Figure 44 Piping connections for upflow chilled water models CW026 - CW084ModelsFactory-Provided Piping Connection Sizes, inchesA,

Piping Schematics60Figure 45 Piping connections for upflow chilled water CW106 and CW114Piping stubbed out inside unit end compartment for fieldconnec

Checklist for Completed Installation619.0 CHECKLIST FOR COMPLETED INSTALLATION9.1 Moving and Placing Equipment___ 1. Unpack and check received materia

Initial Startup Procedure6210.0 INITIAL STARTUP PROCEDURELocate the startup form supplied with the unit documents. Complete the form during startup an

Component Operation and Maintenance, Checks and Adjustments6311.0 COMPONENT OPERATION AND MAINTENANCE, CHECKS AND ADJUSTMENTS11.1 System Testing 11.1.

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

Component Operation and Maintenance, Checks and Adjustments64FirestatThe optional firestat is a bimetal operated sensing device with a Normally Closed

Component Operation and Maintenance, Checks and Adjustments6511.3 Blower Package—Centrifugal FansPeriodic checks of the blower package include: belt,

Component Operation and Maintenance, Checks and Adjustments6611.4.2 Protective FeaturesMonitoring functions protect the motor against overtemperature

Component Operation and Maintenance, Checks and Adjustments6711.5.2 Cleaning Humidifier Pan and Float SwitchBefore turning off unit:1. With the unit o

Component Operation and Maintenance, Checks and Adjustments6811.5.3 Changing Humidifier Lamps1. Remove the humidifier pan (see 11.5.2 - Cleaning Humid

Component Operation and Maintenance, Checks and Adjustments69Operation1. During startup, when the humidity control calls for humidification, the fill

Component Operation and Maintenance, Checks and Adjustments70Replacing the CanisterSee Step 5 of Operation in 11.6 - Steam Generating Humidifier for i

Component Operation and Maintenance, Checks and Adjustments7113. Replace the canister by reversing the above procedure. Make special note of the follo

Component Operation and Maintenance, Checks and Adjustments72Circuit Board AdjustmentsHumidifier operation is governed by the humidifier control board

Component Operation and Maintenance, Checks and Adjustments73Figure 49 Steam generating humidifier control boardTable 8 DIP switch settings for steam

2NOTICERisk of clogged or leaking drain lines. Can cause equipment and building damage.This unit requires a water drain connection. Drain lines must b

Component Operation and Maintenance, Checks and Adjustments7411.7 Condensate Drain and Condensate Pump Systems11.7.1 Condensate DrainCheck and clear o

Troubleshooting7512.0 TROUBLESHOOTINGNOTICERisk of improper control circuits. Can cause equipment damage. When using jumpers for troubleshooting, alwa

Troubleshooting76Table 11 Humidifier—steam generator troubleshootingSymptom Possible Cause Check or RemedyFalse canister full indicationFoamingCheck d

Troubleshooting77Excessive arcing in the canisterDrain valve clogged or defectiveVerify that drain valve operates freely when activated. Clean valve a

HVAC Maintenance Checklist7813.0 HVAC MAINTENANCE CHECKLISTFilters___ 1. Check/replace filters___ 2. Grille area unrestricted___ 3. Wipe section clean

HVAC Maintenance Checklist79Drain Piping___ 1. Check for free running drain system___ 2. Clear out obstructions and material buildup on tubing walls__

HVAC Maintenance Checklist80NOTES

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Liebert CW Nomenclature31.0 LIEBERT CW NOMENCLATURECWCW = Liebert CW Floor Mount Chilled WaterUnit026 D C S A 2 1234 ANominal Capacity, kW026038041051