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Liebert® CW™

IBC Seismic Supplemental User Manual, 26-181kW, Upflow and Downflow

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TABLE OF CONTENTS

IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

SAVE THESE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.0 LIEBERT CW NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

2.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

2.1 Background. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.2 Determining Whether a Unit is IBC-Compliant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.3 Certification Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.0 SITE REQUIREMENTS OF SEISMIC INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

4.0 FLOOR AND FLOOR STAND SEISMIC MOUNTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

4.1 Anchoring Systems Without Floor Stand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84.1.1 Floor-Anchoring Requirements for Seismic Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.2 Anchoring Systems With Floor Stand. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94.2.1 Floor Stand Anchoring Requirements for Seismic Installations . . . . . . . . . . . . . . . . . . . . . . . . 94.2.2 Floor Stand Anchoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

5.0 ELECTRICAL CONSIDERATIONS OF SEISMIC INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . .13

6.0 PIPING CONSIDERATIONS OF SEISMIC INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

6.1 Fluid Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156.1.1 Condensate Piping—Field-Installed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156.1.2 Humidifier Supply Water—Optional Infrared or Steam Generating Humidifier . . . . . . . . . 15

6.2 Chilled Water Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

7.0 PLENUM AND DUCTING CONSIDERATION OF SEISMIC INSTALLATION. . . . . . . . . . . . . . . . . .18

7.1 Plenum Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

7.2 Duct Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

8.0 ANCHOR AND LOAD REQUIREMENTS OF SEISMIC INSTALLATION . . . . . . . . . . . . . . . . . . . .22

9.0 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

9.1 Seismic Bracing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259.1.1 Temporary Service Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

9.2 Inspection of System Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

9.3 Post-Seismic Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

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FIGURESFigure 1 Dimensional data—seismic anchoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Figure 2 Dimensional data—seismic anchoring of rigid floor stand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Figure 3 Electrical wiring—seismic considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Figure 4 Horizontal expansion loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Figure 5 Vertical expansion loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Figure 6 Piping—seismic considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Figure 7 Seismic mounting data—upflow plenums . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Figure 8 Seismic mounting data—downflow plenums. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Figure 9 Seismic duct connection considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

TABLESTable 1 Comparison of certification criteria, 2000-2006 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Table 2 Mounting clips required and location—upflow plenums . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Table 3 Mounting clips required and location—downflow plenums . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Table 4 Downflow Liebert CW models on floor stand with 36" plenum . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Table 5 Upflow Liebert CW models on floor stand with 36" plenum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Table 6 Downflow Liebert CW models on floor stand without plenum. . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Table 7 Upflow Liebert CW models on floor stand without plenum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Table 8 Upflow Liebert CW models direct mount to concrete without plenum . . . . . . . . . . . . . . . . . . . . . 24Table 9 Upflow Liebert CW models direct mount to concrete with 36" plenum. . . . . . . . . . . . . . . . . . . . . 24

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IMPORTANT SAFETY INSTRUCTIONS

This manual contains important safety and installation instructions not included in the Liebert CW user manual, SL-18057. The information in this manual is not a substitute for the data in the Liebert CW user manual, but provides additional information required for units equipped with the seismic option. The information in this manual should be read carefully and used to ensure compliance with the International Building Code. Special inspection per IBC Section 1704 is required during all instal-lations. Read this document and the Liebert CW user manual, SL-18057, thoroughly before attempt-ing to install or operate this unit.

Only properly trained and qualified personnel should move, install or service this equipment.

Adhere to all warnings, cautions and installation, operating and safety instructions on the unit, in the Liebert CW user manual (SL-18057) and in this manual. Follow all operating and user instructions.

SAVE THESE INSTRUCTIONS

! WARNINGRisk of electric shock. Can cause injury or death.

Disconnect local and remote power supplies before working within.

Before proceeding with installation, read all instructions, verify that all the parts are included and check the nameplate to be sure the voltage matches available utility power.

The Liebert iCOM™ microprocessor does not isolate power from the unit, even in the “Unit Off” mode. Some internal components require and receive power even during the “Unit Off” mode of the Liebert iCOM control.

The factory-supplied optional disconnect switch is inside the unit. The line side of this switch contains live high-voltage. With disconnect Off, check for voltage on the load side.

The only way to ensure that there is NO voltage inside the unit is to install and open a remote disconnect switch. Refer to unit electrical schematic.

Follow all local codes.

! WARNINGRisk of high-speed moving parts. Can cause injury or death.

Disconnect all local and remote electric power supplies before working in the unit.

Do not operate upflow units without installing a plenum, ductwork or guard over the blower opening(s) on the top surface of the unit cabinet.

Ductwork must be connected to the blower(s), or a plenum must be installed on the blower deck for protection from rotating blower wheel(s) on upflow units.

! WARNINGRisk of top-heavy unit falling over. Can cause equipment damage, injury or death.

Read all of the following instructions before attempting to move the unit, lift it, remove packaging or prepare the unit for installation.

! WARNINGRisk of seismic event. Can cause equipment damage, injury or death.

Unit must be welded to the floor stand and anchored to the floor or housekeeping pad. If not mounted on a floor stand, the unit must be anchored to the floor or housekeeping pad.

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NOTICERisk of overhead interference. Can cause unit and/or building damage.The unit may be too tall to fit through a doorway while on the skid. Measure the unit and doorway heights and refer to the installation plans to verify clearances prior to moving the unit.

NOTICERisk of damage from forklift. Can cause unit damage.Keep tines of the forklift level and at a height suitable to fit below the skid and/or unit to prevent exterior and/or underside damage.

NOTICERisk of improper storage. Can cause unit damage.Keep the Liebert CW upright, indoors and protected from dampness, freezing temperatures and contact damage.

NOTICERisk of leaking water. Can cause equipment and building damage.This unit requires a water drain connection. It may also require an external water supply to operate.Improper installation, application and service practices can result in water leakage from the unit. Water leakage can result in severe property damage and loss of critical data center equipment.Do not install this unit above equipment or machines that could be damaged by leaking water. Do not install equipment or machines that could be damaged by leaking water below this unit.Emerson recommends installing leak detection equipment for unit and supply lines.

NOTICERisk of structural damage. Drilling holes all the way through the floor or housekeeping pad may cause damage to the structure and can result in damage to lower floors.Drilling holes that penetrate either the floor or the housekeeping pad must be properly filled and sealed.

! CAUTIONRisk of sharp edges, splinters and exposed fasteners. Can cause injury.

Only properly trained and qualified personnel wearing appropriate safety headgear, gloves, shoes and glasses should attempt to move the unit, lift it, remove packaging or prepare the unit for installation.

! CAUTIONRisk of hazardous fumes. Can cause injury or death.

Welding may produce fumes and gases hazardous to health. Avoid breathing these fumes and gases. Use adequate ventilation.

Liebert CW Nomenclature

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1.0 LIEBERT CW NOMENCLATURE

CW

CW = Liebert CW Floor Mount Chilled WaterUnit

114 D C S A 2 1234 A

XXX = Nominal Capacity, kW

D = DownflowU = Upflow with Front

Return

C = Chilled Water

S = Forward-Curved Centrifugal Fan with Standard Motor

V = Forward-Curved Centrifugal Fan with Variable Speed Drive

1 = EC Motorized Impeller

2 = 2-Way Valve, Standard Pressure3 = 3-Way Valve, Standard Pressure1 = 2-Way Valve, High PressureT = 3-Way Valve, High Pressure

A-Z = Standardconfiguration

S = SFA

A = 460/3/60B = 575/3/60C = 208/3/60D = 230/3/602 = 380/3/60F = 380/3/50G = 415/3/50M = 380-415V/3/50 Hz

XXXX

Introduction

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2.0 INTRODUCTION

2.1 Background

The International Code Council’s International Building Code (IBC) is the primary code document for the design and installation of building systems. This has brought about increased scrutiny of mechan-ical and electrical equipment that is used in the operation of facilities, particularly those buildings designated as “essential facilities.” Previously, codes focused only on preventing equipment from breaking free from anchoring and becoming projectiles, and did not consider its structural integrity. These new codes, depending on the Use Group and Importance Factor of the building, may require equipment to function after a seismic event.

IBC-2000, -2009 has made the manufacturer of mechanical and electrical equipment responsible for designing, testing and certifying systems. Emerson, through a recognized Approved Agency, has con-ducted analytical modeling and dynamic shake-table testing of the Liebert CW to provide an option for those systems requiring seismic certification of compliance. The seismic shake-table testing was conducted in accordance with ICC-ES AC-156. This certification goes beyond the equipment’s ability to withstand seismic forces. The IBC system approach includes the equipment, equipment anchoring and the connections to the equipment (power, water supply and return and ducting). In essential applications the equipment must be capable of performing its primary function after a seismic event within the limit of certification.

2.2 Determining Whether a Unit is IBC-Compliant

The catalog Liebert CW unit is NOT IBC-compliant. To be IBC-compliant, units must be ordered with the factory-installed seismic bracing option. Liebert CW units with the seismic bracing option will have:

• Certification label—near the unit nameplate, behind the front panel• Certificate of compliance—included in the customer envelope with this manual• Factory-installed seismic bracing components

NOTE An approved agency is defined by IBC section 1702 as: An established and recognized agency regularly engaged in conducting tests or furnishing inspection services, when such agency has been approved.

NOTEFactory-installed seismic bracing components are painted red and must not be removed.

Introduction

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2.3 Certification Criteria

Liebert CW units equipped with the seismic option are certified to a maximum Ss of 3.0g (3.0 times the force of gravity), adjusted by the soil site coefficient to Soil Site Class D as the default when nei-ther the site soil properties nor the final equipment installation location is known. The certification maximum Sds value of 1.93g includes Soil Class and Seismic Use group corrections. Soil Classes A, B, C, D, E, Seismic Use groups I, II, III, IV and Seismic Design Categories A, B, C, D, E and F are all cov-ered under this certification, limited by the Sds value stated above.

A seismic importance factor, Ip, of 1.5 applies to this certification to include essential facility require-ments and life-safety applications for the Liebert CW system’s functionality after a seismic event.

Shake-table testing conducted in accordance with ICC-ES AC-156 enveloped a required response spectrum (RRS) defined by a maximum flexible region acceleration (AFLEX) of 3.2g and a zero period acceleration (ARIG) of 2.4g.

The Liebert CW, as described above, is approved for seismic application as a system when properly installed in the following configurations:

• Liebert CW Unit, with factory-installed seismic option, attached directly to a housekeeping pad using the anchoring system defined in this seismic installation instruction.

• Liebert CW Unit, with factory-installed seismic option and with factory-supplied plenum. Ple-nums must be flexibly attached to the duct system (if applicable). Unit and plenum must be anchored as defined in this seismic installation instruction.

• Liebert CW Unit, with factory-installed seismic option, installed on an Emerson-supplied, IBC-certified floor stand and attached securely to the building structure. The floor stand and mounting system must be Emerson catalog items, purchased from Emerson. The system must be anchored as specified in this seismic installation instruction.

• The certification excludes all non-Emerson supplied accessories, including but not limited to floor stands, isolators and restraints. Use of non-Emerson accessories will void IBC certification of the Liebert CW system.

Table 1 Comparison of certification criteria, 2000-2006

IBC 2009 IBC 2006 IBC 2003 IBC 2000

Sds <=2.0 Sds <=2.0 Sds <=2.0 Sds <=2.0

Ip <=1.5 Ip <=1.5 Ip <=1.5 Ip <=1.5

ap/Rp <=0.5 ap/Rp <=1.25 ap/Rp <=1.0 ap/Rp <=1.0

z/h <=1.0 z/h <=1.0 z/h <=1.0 z/h <=1.0

Site Requirements of Seismic Installation

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3.0 SITE REQUIREMENTS OF SEISMIC INSTALLATION

All floor and housekeeping pads must be approved by the structural engineer of record to resist the added seismic loads from components being anchored as specified in 8.0 - Anchor and Load Requirements of Seismic Installation. When anchoring the Liebert CW to a floor, rebar interfer-ence must be considered.

The minimum housekeeping pad thickness must be the thickness required by the qualification report for the selected post-installed anchor or 1.5 times the depth the anchor is embedded, whichever is greater.

NOTICEInstallation in structural, lightweight concrete is not permitted unless otherwise approved by the structural engineer of record.

Contact your Emerson representative if a detailed Seismic Installation Calculation Package is required. The information required to perform the calculations should include (but not be limited to):

NOTEStructural engineer of record is defined as: The registered design professional responsible for the design of the designated seismic systems on the building construction documents.

Floor Data: • Concrete compressive strength and aggregate content

• Slab or lightweight concrete over metal deck

• Thickness

• Type of reinforcement (rebar, wire mesh or none)

Housekeeping Pad: • Concrete compressive strength and aggregate content

• Length, width and thickness

• Type of reinforcement (rebar, wire mesh or none)

• Doweled to floor or integrated

Floor and Floor Stand Seismic Mounting

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4.0 FLOOR AND FLOOR STAND SEISMIC MOUNTING

Whether floor-mounted or installed on a floor stand, the Liebert CW must be anchored to the floor or housekeeping pad. Field welding is required for seismic installations. In addition to the clearances specified in the Liebert CW user manual, SL-18057, clearance is required behind the unit to prevent damage to the equipment or building structure in a seismic event. Clearance requirements are depen-dent on the system mounting. Refer to 4.1 - Anchoring Systems Without Floor Stand and 4.2 - Anchoring Systems With Floor Stand for recommendations.

The post-installed anchors used for unit anchoring must be pre-qualified for seismic applications in accordance with ACI 335.2 and documented in a report by a reputable testing agency, such as the Evaluation Service Report issued by the International Code Council. Anchors must be installed to the torque specifications recommended by the anchor manufacturers to ensure maximum loading. Wide washers, sized to match the nominal diameter of the specified anchors, must be used at each anchor location. For tension load distribution the washer is to be placed between the anchor head and the connected equipment. The washers are to be Type A, Series W plain washers per ANSI B18.22.1 - 1965, R1975.

The floor or housekeeping pad must be rebar-reinforced structural concrete that is seismically designed and approved by the structural engineer of record to resist the added seismic loads from components being anchored to the floor (see 3.0 - Site Requirements of Seismic Installation). When installing anchors, rebar interference must be considered.

The installing contractor is responsible for the proper installation of all anchors and mounting hard-ware, observing the mounting requirement details outlined by the structural engineer of record.

NOTEThe floor stand used with EC units is not symmetrical, and its orientation to the Liebert CW is critical to lowering the EC fans. Unless the floor stand is installed in the correct position, the blowers will not lower into the floor stand.


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4.1 Anchoring Systems Without Floor Stand

Anchor brackets provided with the seismic option are to be welded to the base of the unit, flush to the floor, at six locations. These brackets are included in the box of parts shipped with the Liebert CW.

Clearances behind the unit of floor-mounted systems require only enough space to access the system anchoring points.

4.1.1 Floor-Anchoring Requirements for Seismic Installations• Unit directly mounted to structure:

• Six (6) half-inch diameter concrete expansion anchors• Six (6) half-inch Type A, Series W plain washers

• Anchor selection must meet or exceed IBC 2000, 2003 and 2006 compliance requirements.• All anchors listed and any housekeeping pad must be installed to meet compliance.• Anchors must be installed per ICC ESR instructions.• Special inspection per IBC Section 1704 is required on all installations.

See Figure 1 for anchor bracket weld and floor-anchoring details. Also see instructions provided with the box of parts shipped with the Liebert CW unit, Seismic Part Package Field Installation Instruc-tions for Liebert CW [195800].






! WARNINGRisk of top-heavy unit falling over. Can cause equipment damage, injury or death.Read all of the following instructions before attempting to move the unit, lift it, remove packaging or prepare the unit for installation.

! CAUTIONRisk of arc flash and infrared exposure during welding.

Only properly trained and qualified personnel wearing appropriate safety headgear, gloves, shoes and eye protection should be welding.

! CAUTIONRisk of hazardous fumes and gases from welding equipment. Can cause choking and respiratory-system injury or distress.

Only properly trained and qualified personnel wearing protective clothing, gloves, visor and helmet should perform welding operations. Use adequate ventilation.


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4.2 Anchoring Systems With Floor Stand

Units installed on floor stands must be welded to the floor stand as specified herein. Emerson pro-vides a floor stand and mounting systems as selectable items that are IBC-certified and matched to the Liebert CW.

The unit certification is valid only with the Emerson, IBC-certified, matched floor stand.

Clearances behind the unit of floor stand-mounted systems require space for access to the system anchoring points and clearance for unit movement during a seismic event.

4.2.1 Floor Stand Anchoring Requirements for Seismic Installations• 48- and 72-inch width units:

• Eight (8) concrete expansion anchors• Eight (8) Type A, Series W plain washers

• 97- and 120-inch width units:• Twelve (12) concrete expansion anchors• Twelve (12) Type A, Series W plain washers

• Anchor selection must meet or exceed IBC 2000, 2003 and 2006 compliance requirements.• All anchors listed and any housekeeping pad must be installed to meet compliance.• Anchors must be installed per ICC ESR instructions.• Special inspection per IBC Section 1704 is required on all installations.


NOTEThe seismic floor stand is not symmetrical, and its orientation to the Liebert CW unit is critical. Unless the floor stand is installed in the correct position, features such as turning vane and EC plug fans may not function properly.


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4.2.2 Floor Stand Anchoring

See Figure 2 for weld and anchoring details.

1. Check the proposed finished floor height.2. Turn the floor stand over and screw the feet on the bottom until the measurement from the

bottom of the foot to the top surface of the upper tube equals the finished floor height.3. Turn the floor stand right side up.4. If provided with a turning vane, attach it to the stand with #8 self-drilling screws using the 3/16"

holes in the turning vane for location. Spot welding is an acceptable alternative.If a support brace was supplied with the turning vane, install the brace with #8 self-drilling sheet metal screws through the holes in the bottom edge of the turning vane. Attach the top of the brace to the floor stand member using the holes provided.

5. Place the floor stand in the final location in the correct orientation.

6. Level the stand by turning the foot/isolator up or down as necessary. Make sure all feet/isolators are firmly resting on the floor.

7. Tighten foot/isolator jam nuts to prevent movement.8. Mark foot/isolator hole locations on the floor or housekeeping pad. Remove floor stand and set

floor stand aside.9. Drill holes and install anchors according to the manufacturer’s recommendations.10. Set the floor stand into position over the anchor studs and tighten all hardware to the

manufacturer’s torque specifications.11. Position the unit on the floor stand and weld the unit base to the floor stand gussets using a 1/8"

(3mm) continuous weld. See Figure 2.



! CAUTIONRisk of arc flash and infrared exposure during welding. Can cause injury.

Only properly trained and qualified personnel wearing appropriate safety headgear, gloves, shoes and eye protection should be welding.

! CAUTIONRisk of hazardous fumes and gases from welding equipment. Can cause choking and respiratory-system injury or distress.

Only properly trained and qualified personnel wearing protective clothing, gloves, visor and helmet should perform welding operations. Use adequate ventilation.


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Figure 1 Dimensional data—seismic anchoring

ModelNumber

Dimensional Data, in. (mm) AnchorSizeA B

CW026

50 (1270) 29 (737) 1/2"CW038

CW041

CW05174 (1880) 29 (737) 1/2"

CW060

CW07699 (2515) 29 (737) 1/2"

CW084

CW106122 (3099) 29 (737) 1/2"

CW114Anchor bolt sized per Hilti Kwik Bolt TZ carbon and stainless in concrete, ICC ESR-1917.Other anchor bolts are subject to review by Emerson or the structural engineer of record.

2.6"67mm

Field-Welding of Anchor BracketTypical 4 Places

2.6"(67mm)

Floor Anchoring DimensionsA

B

.9" (24mm)

2.3" (59mm) 3.3" (83mm)

2.3"(59mm)

1.8" (46mm) Minimum1/8" (3mm)

1/8" (3mm)Typical Both Sides

ANSI B18.22.1Type A, Series W PlainWasher Required atEach Anchor Location

* Min.Embedment

* Min. HoleDepth

Anchor LocationTypical 6 Places

Front

* Specified by Engineerof Record

DPN001803Pg. 2, Rev. 2


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Figure 2 Dimensional data—seismic anchoring of rigid floor stand

ModelNumber

Dimensional Data, in. (mm) AnchorSizeA B C D

CW026

46.5 (1181) 42.3 (1073) 3.0 (76) 4.0 (102) 1/2"CW038

CW041

CW05170.5 (1791) 42.3 (1073) 3.0 (76) 4.0 (102) 1/2"

CW060

CW07695.5 (2426) 42.3 (1073) 4.0 (102) 6.0 (152) 1/2"

CW084

CW106118.5 (3010) 42.3 (1073) 4.0 (102) 6.0 (152) 1/2"

CW114

CW146118.5 (3010) 54.3 (1378) 6.0 (152) 8.0 (203) 1/2"

CW181Anchor bolt sized per Hilti Kwik Bolt TZ carbon and stainless in concrete, ICC ESR-1917.Other anchor bolts are subject to review by Emerson or the structural engineer of record.

AA/2

B

C

C

D D

C

C

Anchor DetailTypical 6 Places

*Min.Embedment

*Min. HoleDepth

*Min. PadThickness

2.5"(65mm)

Min. Edge Distance

Floor Anchoring Dimensions

1/8" (3mm)2" (44mm)

4" (89mm)

Field Welding of Unit to Floor StandUnit Must Be Welded to Floor Stand to Maintain Certification

* Specified by Engineer of Record

ANSI B18.22.1Type A, Series W PlainWasher Required atEach Anchor Location

DPN001803Pg. 3, Rev. 2

Electrical Considerations of Seismic Installation

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5.0 ELECTRICAL CONSIDERATIONS OF SEISMIC INSTALLATION

Input power and control wiring connections to the Liebert CW must be flexible and able to withstand movement in three dimensions. Relative motion caused by a seismic event must be absorbed to pre-vent damage to the unit, building structure and wiring. It is recommended that all connections to the unit be made as low as possible. The flexible connection should include at least one bend between the unit connection location and the first clamping point at the foundation or structure. It must be of suf-ficient length to makeup for the maximum displacement indicated in Figure 3.

NOTICE Risk of improper electrical supply connection. Can cause equipment damage during a seismic event.

NOTICE Risk of overheated terminals. Can cause wiring and component damage. Use copper wiring only. Make sure that all connections are tight.

! WARNINGRisk of electric shock. Can cause injury or death.Disconnect local and remote power supplies before working within.Before proceeding with installation, read all instructions, verify that all the parts are included and check the nameplate to be sure the voltage matches available utility power.The Liebert iCOM™ microprocessor does not isolate power from the unit, even in the “Unit Off” mode. Some internal components require and receive power even during the “Unit Off” mode of the Liebert iCOM control.The factory-supplied optional disconnect switch is inside the unit. The line side of this switch contains live high-voltage. With disconnect Off, check for voltage on load side.The only way to ensure that there is NO voltage inside the unit is to install and open a remote disconnect switch. Refer to unit electrical schematic.Follow all local codes.





! WARNINGRisk of improper wiring, piping, moving, lifting and handling. Can cause equipment damage, injury or death.

Installation and service should be done only by personnel who have been properly trained and qualified in the installation of air conditioning equipment.

Electrical Considerations of Seismic Installation

14

Figure 3 Electrical wiring—seismic considerations

Field-supplied disconnect switchwhen factory-installed unitdisconnect switch is not provided

UPFLOW MODELS

Seismic Compensation

SeismicCompensation

Seismic Compensation

Three-phase electrical and low voltageconnections not by Emerson (CW106U & CW114U ONLY)

Factory-installed unit disconnect switch (optional)

Monitoring Panel

Monitoring Panel

DOWNFLOW MODELS

Factory-installed unit disconnect switch (optional)Field-supplied disconnectswitch when factory-installedunit disconnect switch isnot provided

Three-phase electrical and low voltageconnections not by Emerson

Flexible conduit and conductors must be provided to allow for movement of the unit in three dimensionsduring a seismic event. The flexible conduit must have at least one bend between the rigid connection atthe unit cabinet and the connection to rigid conduit or foundation.Monitoring panel and disconnect are switched on CW106U, CW 114U, CW089D, CW106D & CW114D.

DPN001803Pg. 8, Rev. 2

Three-phase electrical and low voltageconnections not by Emerson

Piping Considerations of Seismic Installation

15

6.0 PIPING CONSIDERATIONS OF SEISMIC INSTALLATION

All fluid connections to the unit must be flexible and able to withstand movement in three dimen-sions. Relative motion caused by a seismic event must be absorbed to prevent damage to the unit, building structure and piping. It is recommended that all connections to the unit are made as low as possible. The flexible connection should of sufficient length to make up for the maximum displace-ment indicated in Figure 6 and be securely clamped at the foundation or structure and the unit.

6.1 Fluid Connections

NOTICERisk of water leaks. Can cause unit and/or building damage. This unit requires a water drain connection and an external water supply to operate.Improper installation, application and service practices can result in water leakage from the unit.Do not install this unit above equipment or machines that could be damaged by leaking water.Do not install equipment or machines that could be damaged by leaking water below this unit. Emerson recommends installing leak detection equipment for unit and supply lines.

6.1.1 Condensate Piping—Field-Installed

Whether supplied with 3/4" NPT gravity drain connection or 1/2" copper sweat connection from a fac-tory-installed condensate pump, the drain line of the unit will require a flexible element to permit movement. When selecting a suitable flexible element consider the following:

• The drain line may contain boiling water.• Drain is trapped internally. Do not trap external to the equipment.• Gravity drain line must be sized for 2 gpm (7.61 l/m) flow.• Condensate pump discharge sized based on available head.• Drain line must comply with all applicable codes.

6.1.2 Humidifier Supply Water—Optional Infrared or Steam Generating Humidifier

When selecting a suitable flexible element, permitting movement in three dimensions of sufficient length to make up for the maximum displacement, consider the following:

• The humidifier supply connection is 1/4" copper line with a maximum water pressure of 150 psi (1034kPa).

• Size the supply line for 1 gpm (3.8 l/m), with a minimum water pressure of 20 psi (138kPa).

6.2 Chilled Water Piping

The chilled water connections of the Liebert CW product, as with all connections, require a flexible element permitting movement in three dimensions to avoid damage to the unit, structure or piping system. Unlike the other fluid connections, the chilled water supply and return lines pose a unique problem because of the sizes involved. Line sizes can be as large as 2-5/8" OD copper. For these con-nections, Emerson recommends flexible expansion loops. Loops typically consist of two flexible sec-tions of convoluted stainless or bronze metallic hose with braided cover, two elbows and 180° return section with or without support bracket. These loops minimize the seismic loads to the piping system anchor points. Depending on the manufacturer, the connections to the loop are available in female copper sweat, NPT thread, flange or grooved. Maximum displacements are indicated in Figure 6.

! CAUTIONRisk of boiling water. Can cause personal injury.

The unit requires a drain line that may contain boiling water. Only properly trained and qualified personnel wearing appropriate safety equipment should service the drain line or work on parts near or connected to the drain line.


16

Figure 4 Horizontal expansion loop

Figure 5 Vertical expansion loop

Manual shutoff valves should be installed at the supply and return lines to each unit. This provides for routine service and emergency isolation of the unit. To prevent water damage, install a water detection system, such as a Liebert Liqui-tect® or floor drains with wet traps.


17

Figure 6 Piping—seismic considerations

Flexible Loops:All units, either rigidly mounted or mounted on vibration isolators, must be attachedto the piping system using flexible loops designed for seismic movement. Flexibleloops must be capable of movement in the ±X, ± Y, and ±Z planes and must completelyisolate the equipment from the piping. The loops must be suitable for the operatingand temperature range of the system; refer to Liebert installation instructions.This includes 1/4" copper humidifier suppl y, condensate drainage and chilled watersupply and return. Follow manufacture r’s installation instructions for proper seismicapplication of flexible loops.

Anchor Piping to Unit

Anchor Piping

Prefabricated SeismicCompensation Piping

Prefabricated SeismicCompensation Piping

UnitUnit

Secure Pipesto Floor Stand

FLOOR MOUNTFLOOR STAND MOUNT

FLEXIBLELOOP

EXAMPLE

Seismic Compensation Device

To unit

Upflow with floor stand: anchor to floor standUpflow rigid mount: Anchor to unitDownflow: Anchor to floor stand

Anchor toFoundation

DPN001803Pg. 9, Rev. 2

Plenum and Ducting Consideration of Seismic Installation

18

7.0 PLENUM AND DUCTING CONSIDERATION OF SEISMIC INSTALLATION

7.1 Plenum Installation

Liebert front/rear return plenums provided by Emerson are certified as part of the Liebert CW prod-uct. Seismic installations requiring top duct collar (TDC) plenums on Liebert CW051 and larger units must use plenums specifically designed for the certified application. These plenums have additional internal structure to meet the system’s IBC certification criteria.

Seismic-certified installation of Liebert plenums requires the addition of plenum hold-down clips to secure the plenum on top of the unit. These clips must be installed inside the plenum and are included in the box of ship-with parts provided with the Liebert CW unit.

1. Assemble the plenum following the assembly instructions provided with the plenum.2. With the unit power OFF, lift the plenum and position it on top of the unit over the duct collar

provided.3. See Figure 7 and Table 2 for upflow plenum clip installation details and for the number of clips

and their approximate fastening locations; see Figure 8 and Table 3 for downflow plenums. Removing the front/rear grille improves access for the installation of plenum hold-down clips. Also see instructions provided with the box of parts shipped with the Liebert CW unit, Seismic Part Package Field Installation Instructions for Liebert CW [195800].

4. From inside the plenum, fasten the base of plenum to the top and top duct collar of the Liebert CW unit using the appropriate clips for each side.

5. Hook the clip over the unit top duct collar and plenum edge and fasten in place as shown in Figure 7. Install 1/4" self-drilling screws before the #8 screws.

6. Repeat Step 5 for the remaining clips (up to 12 locations).

NOTICEAll clips and fasteners are required to maintain IBC certification of conformity.

! WARNINGRisk of improper plenum mounting. Can cause equipment damage, injury or death in a seismic event.







19

7.2 Duct Connections

Duct connections made to the unit or unit-mounted plenum must be connected with a flexible transi-tion that will not transfer damaging loads to the unit or plenum. Connection must be sized to permit movement of no less than the maximum displacement listed in the table of Figure 9.

Figure 7 Seismic mounting data—upflow plenums

NOTESpecial inspection per IBC section 1704 may be required on ductwork installation.

Table 2 Mounting clips required and location—upflow plenums

ModelNumber

Number of Clips Required Approximate Location inches (mm)

End Front/Rear Total A B C D

CW026

2 2 8 7.4 (188) 31.2 (792) 6.5 (165) 19.0 (483)CW038

CW041

CW0512 3 10 7.4 (188) 27.6 (701) 6.5 (165) 19.0 (483)

CW060

CW0762 4 12 7.4 (188) 26.7 (679) 6.5 (165) 19.0 (483)

CW084

CW1062 4 12 7.4 (188) 34.4 (874) 6.5 (165) 19.0 (483)

CW114

All clips and fasteners are required to maintain IBC certification of conformity

A B B B

D

C

#8 self drilling screwsthrough clip, unit ductcollar and plenum panelflange

PLENUM HOLD-DOWN CLIP DETAILFront Panel not Shown for Clarity

PLENUM HOLD-DOWN CLIP DIMENSIONS

Intermediate support panel(s) provided onIBC-certified top duct collar plenums only(CW051 and higher)

Flanges provided on blower(s) oulet forsupply air ducting when solid panel plenum is usedBoth top duct opening and

front grille are shown. Seespecification sheet forspecific application.

All clips and fasteners are required to maintain IBC certification of conformit y.

1/4" self-drillingscrews throughclip into unit top

DPN001803Pg. 4, Rev. 2


20

Figure 8 Seismic mounting data—downflow plenums

Table 3 Mounting clips required and location—downflow plenums

Model Number

Number of Clips Required Approximate Location inches (mm)

End Front/Rear Total A B C D

CW026

2 2 8 7.4 (188) 31.2 (792) 6.5 (165) 19.0 (483)CW038

CW041

CW0512 3 10 7.4 (188) 27.6 (701) 6.5 (165) 19.0 (483)

CW060

CW0762 4 12 7.4 (188) 26.7 (679) 6.5 (165) 19.0 (483)

CW084

CW089

2 4 12 7.4 (188) 34.4 (874) 6.5 (165) 19.0 (483)CW106

CW114


A B B B

D

C

PLENUM HOLD-DOWN CLIP DIMENSIONS

PLENUM HOLD-DOWN CLIP DETAIL(Front Panel Not Shown for Clarity)

Intermediate support panel(s) provided onIBC-certified top duct collar plenums only(CW051 and larger)

Flanges provided on blower(s) oulet forsupply air ducting when solid panel plenumis used.

Both top duct opening andfront grille are shown. Seespecification sheet forspecific application.

#8 self-drillingscrews throughclip, unit ductcollar and plenumpanel flange(typical all locations)


1/4" self-drillingscrews throughclip into unit top(typical front/rear)

End Clips Rear ClipsFront Clips

DPN001803Pg. 5, Rev. 2


21

Figure 9 Seismic duct connection considerations

DPN001803Pg. 10, Rev. 2

All ducted units, either rigidly mounted or mounted on vibration isolators, must be attached to the ductingsystem using flexible duct designed for seismic movement. Flexible loops shall be capable of movement inthe ±X, ±Y, and ±Z planes and must completely isolate the equipment from the duct work. Refer to Liebertinstallation instructions for ducting requirements. Follow manufacture r’s installation instructions for properseismic application of flexible ducts.

SeismicCompensation

SeismicCompensation

SeismicCompensation

SeismicCompensation

Downflow Ducting Example for SeismicApplications

Upflow Ducting Example for Seismic Applications

Anchor and Load Requirements of Seismic Installation

22

8.0 ANCHOR AND LOAD REQUIREMENTS OF SEISMIC INSTALLATION

All floor and housekeeping pads must be approved by the structural engineer of record to resist the added seismic loads from components being anchored as defined in this section. Data is presented by system configuration. The maximum system loads are given for each loading location or floor stand foot. The maximum load at the anchor is provided for proper sizing of the anchors (not provided by Emerson).


NOTE Load interactions must be considered when selecting anchors.

Table 4 Downflow Liebert CW models on floor stand with 36" plenum

Model #

FloorStandHeight

OperatingMass *

RestraintLocations

MaximumLoad per Anchor

MaximumLoad per Location Anchors

perLocationTension Shear Tension Shear

CW026-CW041DCS24 1163 4 580.3 162.9 1218.2 326.2 2

48 1205 4 815.6 168.4 1710.9 337.1 2

CW051-CW060DCS24 1578 4 663.5 217.3 1460.6 434.6 2

48 1629 4 935.3 223.9 2054.8 447.8 2

CW076-CW084DCS24 1936 6 547.5 180.9 1200.9 361.9 2

48 2005 6 774.5 186.9 1695.6 374 2

CW089-CW114DCS24 2590 6 722.7 241.7 1611 483.4 2

48 2668 6 1009.7 248.6 2245.6 497.1 2

CW026-CW041DC124 1108.1 4 554.8 155.1 1164.6 310.5 2

48 1149.8 4 778.6 160.5 1633.4 321.4 2

CW051 CW060DC124 1538.4 44 648.2 211.8 1426.8 423.5 22

48 1588.6 4 913 218.4 2005.6 436.7 2

CW076-CW084DC124 1881.1 6 533.1 175.6 1169.5 351.4 2

48 1950.3 6 753.5 181.7 1649.7 363.5 2

CW089-CW114DC124 2589.5 6 722.7 241.7 1611 483.4 2

48 2667.6 6 1009.7 248.6 2245.6 497.1 2

CW146-CW181DC1**24 3136.5 6 943 284.7 2017.7 569.6 2

48 3237 6 1233.8 294.5 2636.9 589.2 2

* Operating mass includes the operating water volume, floor stand and plenum** 18" filter plenum only


23

Table 5 Upflow Liebert CW models on floor stand with 36" plenum

Model Number

FloorStandHeight

OperatingMass *

RestraintLocations

Maximum Loadper Anchor

Maximum Loadper Location Anchors

perLocationTension Shear Tension Shear

CW026-CW041UCS24 1163.1 4 633.4 160.2 1329.8 320.6 2

48 1204.8 4 868.7 165.6 1822.6 331.6 2

CW051-CW060UCS24 1578.4 4 748.4 226.4 1646 452.6 2

48 1628.6 4 1020.2 233 2240.2 465.8 2

CW076-CW084UCS24 1936.1 6 613.1 184.6 1343.8 369.3 2

48 2005.3 6 840.1 190.6 1838.4 381.5 2

CW089-CW114UCS24 2589.5 6 816.4 250.6 1818.1 501.2 2

48 2667.6 6 1103.4 257.4 2452.7 514.9 2

* Operating mass includes the operating water volume, floor stand and plenum.

Table 6 Downflow Liebert CW models on floor stand without plenum

Model NumberOperating

Mass *RestraintLocations


Maximum Loadper Location

Anchorsper LocationTension Shear Tension Shear

CW026-CW041DCS1008 4 427.9 142.5 898.7 285.4 2

1049 4 630.9 148 1323.8 296.3 2

CW051-CW060DCS1358 4 482 187.2 1062.6 374.3 2

1408 4 715.1 193.8 1572.1 387.5 2

CW076-CW084DCS1676 6 399.9 159.2 878.4 318.6 2

1745 6 595.5 165.3 1304.8 330.7 2

CW089-CW114DCS2255 6 539 211.5 1203.2 423 2

2333 6 788 218.3 1753.9 436.7 2

CW026-CW041DC1953 4 402.4 134.7 845.1 269.7 2

994 4 593.9 140.1 1246.2 280.6 2

CW051CW060DC11318 4 466.7 181.6 1028.8 363.2 2

1368 4 692.7 188.2 1523 376.4 2

CW076-CW084DC11621 6 385.6 153.9 847 308 2

1690 6 574.6 160 1258.9 320.2 2

CW089-CW114DC12255 6 539 211.5 1203.2 423 2

2333 6 788 218.3 1753.9 436.7 2

CW146-CW181DC1**3136 6 943 284.7 2017.7 569.6 2

3237 6 1233.8 294.5 2636.9 589.2 2

* Operating mass includes the operating water volume, floor stand and plenum.** 18" filter plenum only.


24

Table 7 Upflow Liebert CW models on floor stand without plenum


Mass*RestraintLocations


Maximum Loadper Location

Anchorsper LocationTension Shear Tension Shear

CW026-CW041UCS 1008 4 481.1 139.8 1010.3 279.8 2

1049 4 684.1 145.2 1435.4 290.8 2

CW051-CW060UCS 1358 4 566.9 193.8 1248 387.5 2

1408 4 799.9 200.4 1757.5 400.7 2

CW076-CW084UCS 1676 6 465.5 159.7 1021.3 319.5 2

1745 6 661.2 165.7 1447.6 331.7 2

CW089-CW114UCS 2255 6 632.7 220.4 1410.3 440.7 2

2333 6 881.8 227.2 1961 454.4 2


Table 8 Upflow Liebert CW models direct mount to concrete without plenum



Maximum Load per AnchorAnchors

per LocationTension Shear

CW026-CW041UCS 909 6 664.5 192.5 1

CW051-CW060UCS 1241 6 919.3 258.6 1

CW076-CW084UCS 1519 6 1074.2 303.9 1

CW089-CW114UCS 2065 6 1094.7 398 1


Table 9 Upflow Liebert CW models direct mount to concrete with 36" plenum



Maximum Load per AnchorAnchors

per LocationTension Shear

CW026-CW041UCS 1065 6 929.8 226 1

CW051-CW060UCS 1461 6 1280.9 305.5 1

CW076-CW084UCS 1780 6 1498 355.9 1

CW089-CW114UCS 2400 6 1491.5 458.6 1


Maintenance

25

9.0 MAINTENANCE

9.1 Seismic Bracing

Liebert CW units supplied with the seismic option can be easily identified once the panels are removed. All seismic bracing is painted red and is factory-installed. Seismic bracing should not be removed except when absolutely necessary. If any bracing is removed for service access, reinstall it immediately after servicing unit.

9.1.1 Temporary Service Access

Seismic bracing is fastened to the unit frame with 1/4" self-drilling screws or bolts requiring a 3/8" (10mm) wrench for removal. Units with plenums use #8 Phillips head, self-drilling screws in addition to 1/4" self-drilling screws. Any bracing removed for service must be reinstalled and the 1/4" fasteners must be tightened to 10 ft-lb. If a screw is stripped out, install a replacement at a new location within 1/2" (12mm) of the original location.

9.2 Inspection of System Connections

Check all connections to the system during routine maintenance and take appropriate action to cor-rect any issues. System maintenance schedules must be established and performed.

! WARNINGRisk of electric shock. Can cause injury or death.Disconnect local and remote power supplies before working within.Before proceeding with installation, read all instructions, verify that all the parts are included and check the nameplate to be sure the voltage matches available utility power.The Liebert iCOM™ microprocessor does not isolate power from the unit, even in the “Unit Off” mode. Some internal components require and receive power even during the “Unit Off” mode of the Liebert iCOM control.The factory-supplied optional disconnect switch is inside the unit. The line side of this switch contains live high-voltage. With disconnect Off, check for voltage on the load side.The only way to ensure that there is NO voltage inside the unit is to install and open a remote disconnect switch. Refer to unit electrical schematic.Follow all local codes.





! WARNINGRisk of unit collapse. Can cause injury or death.

Braces are required for seismic certification. If removed for service access, reinstall brace after servicing unit.

Maintenance

26

9.3 Post-Seismic Inspection

Many areas of the country that are subject to seismic activity are working to draft local and national guidelines and procedures for evaluating earthquake-damaged buildings and equipment. In 1989, with funding from the California Office of Emergency Services, California Office of Statewide Health Planning and Development and the Federal Emergency Management Agency, the Applied Technology Council (ATC) published the ATC-20 Procedures for Post Earthquake Safety Evaluation of Buildings. Inspections outlined in the document, may be required by areas that have adopted ATC-20 and must be performed by a qualified individual.

The Liebert CW seismic certification of conformity is an assurance that the system will withstand a seismic event occurring within the defined limits of 2.3 - Certification Criteria and continue to per-form the primary function of cooling. After any significant seismic event greater than a magnitude 6.5, Emerson requires an inspection of the system structure and connections by a registered profes-sional engineer with five years of experience in seismic anchorage. This inspection will apply to equip-ment within a 100 mile (160km) radius of the seismic event. If evidence of structural cracks, yielding or loosening of structural members is found, the system must be replaced or restored to the original design configuration.

Ensuring The High AvailabilityOf Mission-Critical Data And Applications.

Emerson Network Power, a business of Emerson (NYSE:EMR),is the global leader in enabling Business-Critical Continuity™

from grid to chip for telecommunication networks, data centers,health care and industrial facilities. Emerson Network Powerprovides innovative solutions and expertise in areas includingAC and DC power and precision cooling systems, embeddedcomputing and power, integrated racks and enclosures,power switching and controls, infrastructure management,and connectivity. All solutions are supported globally by localEmerson Network Power service technicians. Liebert AC power,precision cooling and monitoring products and servicesfrom Emerson Network Power deliver Efficiency Without Compromise™ by helping customers optimize their data center infrastructure to reduce costs and deliver high availability.

While every precaution has been taken to ensure the accuracyand completeness of this literature, Liebert Corporation assumes noresponsibility and disclaims all liability for damages resulting from use ofthis information or for any errors or omissions.© 2009 Liebert CorporationAll rights reserved throughout the world. Specifications subject to changewithout notice.® Liebert is a registered trademark of Liebert Corporation.All names referred to are trademarksor registered trademarks of their respective owners.

Technical Support / ServiceWeb Site

www.liebert.comMonitoring

[email protected]

Outside North America: +00800 1155 4499Single-Phase UPS & Server Cabinets

[email protected]

Outside North America: +00800 1155 4499Three-Phase UPS & Power Systems

800-543-2378Outside North America: 614-841-6598

Environmental Systems800-543-2778

Outside the United States: 614-888-0246

LocationsUnited States

1050 Dearborn DriveP.O. Box 29186

Columbus, OH 43229Europe

Via Leonardo Da Vinci 8Zona Industriale Tognana

35028 Piove Di Sacco (PD) Italy+39 049 9719 111

Fax: +39 049 5841 257Asia

29/F, The Orient Square BuildingF. Ortigas Jr. Road, Ortigas Center

Pasig City 1605Philippines

+63 2 687 6615Fax: +63 2 730 9572

Emerson Network Power. The global leader in enabling Business-Critical Continuity™ EmersonNetworkPower.com

Emerson, Business-Critical Continuity, Emerson Network Power and the Emerson Network Power logo are trademarks of Emerson Electric Co. or one of its affiliated companies.©2009 Emerson Electric Co.

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