Vertiv Liebert CW440, Liebert CW340 Installer/user Manual

Liebert®

CW™ ThermalManagementSystem

Installer/User Guide

340kW to 440 kW Capacity, 60Hz

The information contained in this document is subject to change
without notice and may not be suitable for all applications. While
every precaution has been taken to ensure the accuracy and
completeness of this document, Vertiv assumes no responsibility
and disclaims all liability for damages resulting from use of this
information or for any errors or omissions. Refer to other local
practices or building codes as applicable for the correct methods,
tools, and materials to be used in performing procedures not
specifically described in this document.

The products covered by this instruction manual are manufactured
and/or sold by Vertiv This document is the property of Vertiv and
contains confidential and proprietary information owned by Vertiv.
Any copying, use or disclosure of it without the written permission
of Vertiv is strictly prohibited.

Names of companies and products are trademarks or registered
trademarks of the respective companies. Any questions regarding
usage of trademark names should be directed to the original
manufacturer.

Technical Support Site

If you encounter any installation or operational issues with your product, check the pertinent
section of this manual to see if the issue can be resolved by following outlined procedures.
Visit https://www.VertivCo.com/en-us/support/ for additional assistance.

Vertiv |Liebert® CW™ Installer/User Guide

TABLE OF CONTENTS

1 Important Safety Instructions 5
2 Nomenclature and Components 9

2.1 Liebert CW Model-number Nomenclature 9

2.2 Component Location 10

3 Planning Guidelines 11

3.1 Capacity and Physical Data 11

3.2 Shipping Dimensions and Unit Weights 12

3.3 Planning Dimensions 13

4 Pre-installation PreparationandGuidelines 15

4.1 Site Preparation 15

4.1.1 Preparing a Concrete Slab 15

5 Equipment Inspection and Handling 17

5.1 Hardware Kit 17

5.2 Rigging 18

6 Installing the Unit 21

6.1 Connecting Unit Sections (Recommended) 23

6.2 Routing the Filter-clog Pick-up Tube in the Plenum 24

7 Electrical Connections in the Unit 25

7.1 Fan High-voltage connections 25

7.2 Fan-control Low-voltage connections 25

7.3 Condensate-pump High- and Low-voltage Connections 27

8 Piping Requirements 29

8.1 Installing Water Supply and Return Piping 29

8.2 Installing Drain Traps on a Unit without a Condensate Pump 29

8.3 Installing Condensate-discharge Tubing on Units with a Condensate Pump 31

8.4 Flushing the Entire Water System before Start-up 32

Appendices 33

Appendix A: Technical Support and Contacts 33
Appendix B: Optional Configuration forLiebert®CW440Seismic Application 35
Appendix C: Submittal Drawings 37

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Vertiv | Liebert® CW™ Installer/User Guide | 4

1 IMPORTANT SAFETY INSTRUCTIONS

SAVE THESE INSTRUCTIONS

This manual contains important safety instructions that should be followed during the installation and
maintenance of the Liebert®CW. Read this manual thoroughly before attempting to install or operate this
unit.

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

Adhere to all warnings, cautions, notices and installation, operating and safety instructions on the unit
and in this manual. Follow all installation, operation and maintenance instructions and all applicable
national and local building, electrical and plumbing codes.

WARNING! Arc flash and electric shock hazard. Open all local and remote electric power-supply
disconnect switches, verify with a voltmeter that power is Off and wear appropriate,
OSHA-approved personal protective equipment (PPE) per NFPA 70E before working within the
electric control enclosure. Failure to comply can cause serious injury or death. Customer must
provide earth ground to unit, per NEC, CEC and local codes, as applicable. 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® controller 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 controller. 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.

WARNING! Risk of improper moving. Can cause equipment damage, injury or death. Use only
lifting equipment that is rated for the unit weight by an OSHA-certified rating organization. The
center of gravity varies depending on the unit size and selected options. The slings must be
equally spaced on either side of the center of gravity indicator.
Shipping weights and unit weights are listed in the tables in Shipping Dimensions and Unit

Weights on page12. Use the center of gravity indicators on the unit to determine the position of

the slings.

WARNING! Risk of improper lifting. Can cause equipment damage, injury, or death. A spreader
bar or equivalent must be used when rigging to ensure the lifting force is completely vertical at
these fasteners. Lift points are rated for lifting this section only. Do not lift assembled sections
from these lift points.

WARNING! Risk of contact with high-speed, rotating fan impeller blades. Can cause injury or
death. Open all local and remote electric power-supply disconnect switches, verify with a
voltmeter that power is off, and verify that all fan impellers have stopped rotating before
working in the unit cabinet.

WARNING! Risk of top-heavy unit falling over. Improper handling can cause equipment
damage, injury or death. Read all of the following instructions and verify that all lifting and
moving equipment is rated for the weight of the unit before attempting to move, lift, remove
packaging from or prepare the unit for installation.

1 ImportantSafety Instructions 5

NOTICE

NOTICE

CAUTION: Risk of contact with sharp edges, splinters, and exposed fasteners. Can cause
injury. Only properly trained and qualified personnel wearing appropriate, OSHA-approved PPE
should attempt to move, lift, remove packaging from or prepare the unit for installation.

Risk of improper power-supply connection. Can cause equipment damage and loss of warranty
coverage.

Prior to connecting any equipment to a main or alternate power source (for example: back-up
generator systems) for start-up, commissioning, testing, or normal operation, ensure that these
sources are correctly adjusted to the nameplate voltage and frequency of all equipment to be
connected. In general, power-source voltages should be stabilized and regulated to within
±10% of the load nameplate nominal voltage. Also, ensure that no three-phase sources are
single-phased at any time.

Risk of piping-system corrosion and freezing fluids. Can cause leaks resulting in equipment
and very expensive building damage. Cooling coils and piping systems are at high risk of
freezing and premature corrosion. Fluids in these systems must contain the proper antifreeze
and inhibitors to prevent freezing and premature coil and piping corrosion. The water or
water/glycol solution must be analyzed by a competent local water treatment specialist before
start up to establish the inhibitor and antifreeze solution requirement and at regularly
scheduled intervals throughout the life of the system to determine the pattern of inhibitor
depletion.

The complexity of water/glycol solution condition problems and the variations of required
treatment programs make it extremely important to obtain the advice of a competent and
experienced water treatment specialist and follow a regularly scheduled coolant fluid system
maintenance program.

Water chemistry varies greatly by location, as do the required additives, called inhibitors, that
reduce the corrosive effect of the fluids on the piping systems and components. The chemistry
of the water used must be considered, because water from some sources may contain corrosive
elements that reduce the effectiveness of the inhibited formulation. Sediment deposits prevent
the formation of a protective oxide layer on the inside of the coolant system components and
piping. The water/coolant fluid must be treated and circulating through the system
continuously to prevent the buildup of sediment deposits and or growth of sulfate reducing
bacteria.

Proper inhibitor maintenance must be performed in order to prevent corrosion of the system.
Consult glycol manufacturer for testing and maintenance of inhibitors.

Commercial ethylene glycol, when pure, is generally less corrosive to the common metals of
construction than water itself. It will, however, assume the corrosivity of the water from which it
is prepared and may become increasingly corrosive with use if not properly inhibited.

We recommend installing a monitored fluid-detection system that is wired to activate the
automatic-closure of field-installed coolant-fluid supply and return shut-off valves to reduce
the amount of coolant-fluid leakage and consequential equipment and building damage. The
shut-off valves must be sized to close-off against the maximum coolant-fluid system pressure
in case of a catastrophic fluid leak.

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Vertiv | Liebert® CW™ Installer/UserGuide

NOTICE

NOTICE

NOTICE

Risk of frozen pipes and corrosion from improper coolant mixture. Can cause water leaks
resulting in equipment and building damage.

When the cooling unit or piping may be exposed to freezing temperatures, charge the system
with the proper percentage of glycol and water for the coldest design ambient temperature.
Automotive antifreeze is unacceptable and must NOT be used in any glycol fluid system. Use
only HVAC glycol solution that meets the requirements of recommended industry practices.

Risk of no-flow condition. Can cause equipment damage. Do not leave the water/coolant fluid­supply circuit in a no-flow condition. Idle fluid allows the collection of sediment that prevents
the formation of a protective oxide layer on the inside of tubes. Keep unit switched On and
water/coolant fluid-supply circuit system operating continuously.

Risk of clogged or leaking drain lines and leaking water-supply lines. Can cause equipment and
building damage.

This unit requires a water drain connection. Drain lines must be inspected at start-up and
periodically, and maintenance must be performed to ensure that drain water runs freely
through the drain system and that lines are clear and free of obstructions and in good
condition with no visible sign of damage or leaks. This unit 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 catastrophic and expensive building and equipment damage
and loss of critical data center equipment.

NOTICE

NOTICE

NOTICE

Do not locate unit directly above any equipment that could sustain water damage.

We recommend installing a monitored fluid-detection system to immediately discover and
report coolant-fluid system and condensate drain-line leaks.

Risk of doorway/hallway interference. Can cause unit and/or structure damage. The unit may
be too large to fit through a doorway or hallway while on the skid. Measure the unit and
passageway dimensions, and refer to the installation plans prior to moving the unit to verify
clearances.

Risk 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.

Risk of improper storage. Can cause unit damage.

Keep the unit upright, indoors and protected from dampness, freezing temperatures and
contact damage.

1 ImportantSafety Instructions 7

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Vertiv | Liebert® CW™ Installer/UserGuide

2 NOMENCLATURE AND COMPONENTS

This section describes the model-number configuration for Liebert® CW units and components.

2.1 Liebert CW Model-number Nomenclature

Table 2.2 below describes each digit of the model number.

Table 2.1 CW Model Number

1 2 3 4 5 6 7 8 9 10 11 12 1 3 14

C W 0 2 6 D C S A 2 A X X X

Table 2.2 CW Model-number Digit Definitions

Digit Descript ion

Digits 1 and2 = Unit Family

CW = Liebert® CW floor-mounted, chilled-water unit

Digit 3, 4, 5 = Nominal Cooling Capacity, kW

340 = 340 kW

440 = 440kW

Digit 6 = Air Distribution

D = Downflow

Digit 7 = Cooling Type

C = Chilled water

Digit 8 = Fan Type

1 = EC fan

Digit 9 = Voltage

A = 460V - 3ph- 60Hz

B = 575V - 3ph - 60Hz

Digit 10 = Valve Type

2 = 2-way valve, standardpressure

1 = 2-way valve, high pressure

Digit 11 = Configuration Code

A-Z= Standard configuration

S = SFA

Digit 12, 13, 14= Factory configuration number

2 Nomenclature and Components 9

2.2 Component Location

The unit component locations are described in the submittal documents included in the Submittal

Drawings on page37.

The following table lists the relevant documents by number and title.

Table 2.3 Component-location Drawings

Document Number Title

DPN003577 Component Location, CW340

DPN003574 Component Location, CW440

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Vertiv | Liebert® CW™ Installer/UserGuide

3 PLANNING GUIDELINES

3.1 Capacity and Physical Data

Table 3.1 Performance data, Standard Chilled-water Unit withECfans

Model No. 340 440

NET CAPACITY DATA kBTU/H (kW) BASED ON 45°F (7.2°C) ENTERING WATER, 10°F (5.5°C) WATER RISE

75°F DB, 61°F WB (23.9°C DB , 16.1°C WB) 45% RH

Total Capacity, kBTUH (kW) 1410 (431) 1758 (515)

Sensible Capacity, kBTUH (kW) 1184(346) 1525 (447)

Flow Rate, GPM (l/s) 300 (18.9) 385 (24.29)

Pressure Drop, ft (kPA) 44 (130.7) 29 (87.3)

Fan Data - EC Fans - Available in Downflow Orientations

NominalAir Volume, CFM (CMH) 45,000 (76,455) 60,000 (101,941)

Fan Motor, Maximum hp (kW), each 16.1 (12.0) 16.1(12.0)

Standard Ext. Static Pressure, inches of water (PA) 0.3 (74.7) 0.3 (74.7)

Number of fans 3 4

Chilled Water Coil

Face Area, ft2(m2) 96 (8.91) 130 (12.08)

Number of Rows 6 6

Face Velocity, FPM(m/s) 470 (2.39) 460 (2.34)

Chilled Water Valves Maximum design water pressure 400PSI (2757 kPa)

Valve Actuator, Sensors and Body

Valve CV 70 130

Valve Size, in. 3.0 3.0

2-wayValve (optional)Close-off Pressure, PSI

(kPA)

Filter Section

Disposable Type - MERV8 (standard) or MERV11 (option)

NominalSizes, in. 20 x 24 x 4 18 x 24 x 4 20 x24 x 4 18 x 24 x 4

Quantity of each 18 9 22 11

Connection Sizes

Chilled Water (grooved, black pipe) 4 in.

Condensate Drain 2 x 1-1/4 in.

Condensate Discharge (when supplied with pump),

O.D.

100 (689) 100 (689)

1/2-in. compression

3 Planning Guidelines 11

Table 3.2 Electrical data—with EC fans, 460
V/60 Hz

Model Qty. fans Voltage No reheat/No humidifier

FLA 46.5

CW340 3

CW440 4

WSA 50.4

OPD 60

FLA 62.0

WSA 65.9

OPD 80.0

3.2 Shipping Dimensions and Unit Weights

Table 3.3 Shipping Dimensions and weights for CW340

Model/Skid* Dimensions L x W x H, in. (mm) Weight, lb (kg)

Coil 190 x 70 x 87 (4826 x 1778x 2210) 4034 (1829)

Fan and Filter box 150 x 70 x 87 (3810 x 1778x 2210) 3027 (1373)

*Each system ships on two skids. Skid 1 is the coil section. Skid 2 isthe fan/filter-box sections.

Table 3.4 Shipping Dimensions and weights for CW440

Sections* Dimensions L x W x H, in. (mm) Weight, lb (kg)

Coil 190 x 70 x 87 (4826 x 1778x 2210) 4528 (2053)

Fan and Filter box 190 x 70 x 87 (4826 x 1778x 2210) 3896 (1767)

*Each system ships on two skids. Skid 1 is the coil section. Skid 2 isthe fan/filter-box sections.

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Vertiv | Liebert® CW™ Installer/UserGuide

3.3 Planning Dimensions

The unit, floor stand, and plenum dimensions are described in the submittal documents included in the

Submittal Drawings on page37.

The following table lists the relevant documents by number and title.

Table 3.5 Dimension Planning Drawings

Document Number Title

Downflow Units with EC Fans

DPN003561 Cabinet DimensionalData, CW340 with filter plenum

DPN003569 Cabinet DimensionalData, CW440 with filter plenum

Floor Stands for Units with EC Fans

DPN003964 Floorstand DimensionalData, Downflow Models, CW340

DPN003570 Floorstand D imensionalData, Downflow Models, CW440

3 Planning Guidelines 13

Table 3.5 Dimension Planning Drawings (continued)

Document Number Title

Plenums for Units with EC Fans

DPN003964 Optionalrear-ducted EC fan sec tion for CW340

DPN003676 Optionalrear-ducted EC fan section for CW440

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Vertiv | Liebert® CW™ Installer/UserGuide

4 PRE-INSTALLATION PREPARATIONANDGUIDELINES

NOTE: Before installing unit, determine whether any building alterations are required to run piping,
wiring and ductwork. Follow all unit dimensional drawings and refer to the submittal engineering
dimensional drawings of individual units for proper clearances.

Refer to Table 2.2 on page9, and submittal drawings to determine the type of system being installed
and anticipate building alterations, piping and ductwork needed.

The unit dimensions, pipe-connection locations, and piping schematics are described in the submittal
documents included in the Submittal Drawings on page37.

• Verify that the floor is level, solid and sufficient to support the unit. See Table 3.3 on page12
for unit weights.

• Confirm that the room is properly insulated and has a sealed vapor barrier.

• For proper humidity control, keep outside or fresh air to an absolute minimum (less than 5% of
total air circulated in the room).

• Do not install a Liebert® CW in an alcove or at the end of a long, narrow room.

• Install the units as close as possible to the largest heat load.

• Allow at least the minimum recommended clearances for maintenance and service. See the
appropriate submittal drawings for dimensions.

• We recommend installing an under-floor water detection system. Contact your Vertiv
representative for information.

4.1 Site Preparation

Prepare the site for installation prior to arrival and unloading of the unit.

• If installing the unit on a concrete slab or housekeeping pad, sweep the concrete clean and
mark the final position of the unit(s) on the slab.

• Verify that all required clearances as specified by Vertiv are met.

• Mark the direction of the final unit placement to avoid accidental reversal of the unit.

• Protect stub-outs for electric conduit and any other projections against damage and clearly
mark their locations.

• Locate and mark the high point on the slab. This step is critical for the placement of multiple,
joined units.

• If installing on a structural-steel support structure, verify suitability of the supports beneath
the unit(s).

4.1.1 Preparing a Concrete Slab

1. Sweep the slab broom clean.

2. Lay out the final location of the unit on the slab, using either chalk line or tape, see Figure 4.1
on the next page.

3. Using a laser level or optical level, locate the high point on the slab and mark it, see Figure 4.1
on the next page.

4 Pre-installation PreparationandGuidelines 15

Figure 4.1 Unit and high-point marking on concrete slab

Item Description

1 Concrete slab

2 High point

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Vertiv | Liebert® CW™ Installer/UserGuide

5 EQUIPMENT INSPECTION AND HANDLING

SAFETY INFORMATION

WARNING! Risk of top-heavy unit falling over. Improper handling can cause equipment
damage, injury or death. Read all of the following instructions and verify that all lifting and
moving equipment is rated for the weight of the unit before attempting to move, lift, remove
packaging from or prepare the unit for installation. Unit weights are specified in Table 3.3 on
page12.

CAUTION: Risk of contact with sharp edges, splinters, and exposed fasteners. Can cause
injury. Only properly trained and qualified personnel wearing appropriate, OSHA-approved PPE
should attempt to move, lift, remove packaging from or prepare the unit for installation.

NOTICE

Risk of passageway interference. Can cause unit and/or structure damage. The unit may be
too large to fit through a passageway while on or off the skid. Measure the unit and passageway
dimensions, and refer to the installation plans prior to moving the unit to verify clearances.

NOTICE

Risk 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.

NOTICE

Risk of improper storage. Keep the unit upright, indoors and protected from dampness,
freezing temperatures and contact damage.

Upon arrival of the unit and before unpacking:

• Verify that the labeled equipment matches the bill of lading.

• Carefully inspect all items for visible or concealed damage.

• Report damage immediately to the carrier and file a damage claim with a copy sent to Vertiv or
to your sales representative.

• For initial access use a 7/32-in. Allen wrench for panel removal.

Equipment Recommended for Handling the Unit:

• Forklift

• Slings

• Spreader bars

5.1 Hardware Kit

The coil section of the unit ships with a hardware kit containing materials for reassembly of the unit
sections.

• 1-in. wide adhesive-backed foam (1/2-in. wide for seismic) for gasketing between unit sections

• 1-in. wide adhesive-backed foam for panel gasketing at the field-weld locations of sections
(seismic only)

5 EquipmentInspection and Handling 17