Vertiv Liebert CW Instructions d'installation et d'entretien

Liebert®

CW™ ThermalManagementSystem

Installer/User Guide

305kW, 375kW, 415kW Capacity, 50/60Hz

Vertiv | Liebert® CW™ Installer/User Guide

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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.Vertiv.com/en-us/support/ for additional assistance.

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

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TABLE OF CONTENTS

Important Safety Instructions 1

1 Nomenclature and Components 7

1.1 Liebert CW Model-number Nomenclature 7

1.2 Component Location 10

2 Pre-installation PreparationandGuidelines 11

2.1 Planning Dimensions 11

2.2 Connections and System Setup 12

2.3 Operating Conditions 12

2.3.1 Cooling, Dehumidification and Humidification 12

2.3.2 Humidification Control 12

2.4 Shipping Dimensions and Unit Weights 12

3 Equipment Inspection and Handling 13

3.1 Packaging Material 14

3.2 Handling the Unit while Packaged 14

3.3 Unpacking the Unit 15

3.4 Removing the Unit from the Skid 16

4 Electrical Connections 21

5 Piping Requirements 23

5.1 Drain Fluid Connections 24

5.1.1 Field-installed, Gravity-fed Drain Line Requirements 24

5.1.2 Condensate-pump Drain Line Requirements 25

5.2 Chilled-water Loop Piping Guidelines 25

5.2.1 Leak Checking for Unit and Field-installed Piping 27

6 Checklist for Completed Installation 29

6.1 Moving and Placing Equipment 29

6.2 Electrical Installation Checks 29

6.3 Piping Installation Checks 29

6.4 Other Installation Checks 29

7 Initial Start-up Checks andCommissioningProcedure ForWarrantyInspection 31

8 Maintenance 33

8.1 Filters 34

8.1.1 Replacing the Filters 35

8.2 Fan Maintenance 36

8.2.1 Fan Assembly Troubleshooting 36

8.2.2 Fan Impellers 37

8.2.3 Blower-motor Lubrication 37

8.2.4 Removing Fan Assembly 38

8.3 Condensate-drain and Condensate-pump System Maintenance 38

8.3.1 Condensate Drain 38

8.3.2 Condensate Pump 38

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

9 Preventive Maintenance Checklist 39

Appendices 43

Appendix A: Technical Support and Contacts 43

Appendix B: Submittal Drawings 45

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

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 electric shock. Can cause equipment damage, injury or death. Open all local

and remote electric power supply disconnect switches and verify with a voltmeter that power is

off before working within any electric connection enclosures. Service and maintenance work

must be performed only by properly trained and qualified personnel and in accordance with

applicable regulations and manufacturers’ specifications. Opening or removing the covers to

any equipment may expose personnel to lethal voltages within the unit even when it is

apparently not operating and the input wiring is disconnected from the electrical source.

WARNING! Risk of electric shock. Can cause serious injury or death. 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. Open all local and remote electric power disconnect switches and verify with a

voltmeter that power is Off before working on any component of the system.

Important Safety Instructions 1

WARNING! Risk of electric shock. Can cause serious injury or death. Open all local and remote

electric power supply disconnect switches and verify with a voltmeter that power is off before

working within the fan-motor electric-connection enclosures. Fan-motor controls can maintain

an electric charge for 10 minutes after power is disconnected. Wait 10 minutes after power is

verified as off before working within the electric control/connection enclosures. Use only fully-

trained and qualified HVAC technicians to perform maintenance on the fans.

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 wiring, piping, moving, lifting and handling. Can cause equipment

damage, serious injury or death. Installation and service of this equipment should be done only

by qualified personnel who have been specially-trained in the installation of air-conditioning

equipment and who are wearing appropriate, OSHA-approved PPE.

WARNING! Risk of improper piping installation, leak checking, fluid chemistry and fluid

maintenance can cause equipment damage and personal injury. Installation and service of this

equipment should be done only by qualified personnel who have been specially-trained in the

installation of air-conditioning equipment and who are wearing appropriate, OSHA-approved

PPE.

WARNING! Risk of contact with high-speed rotating fan blades. Can cause serious 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 blades have stopped rotating before working

in the unit cabinet or on the fan assembly. If control voltage is applied, the fan motor can restart

without warning after a power failure. Do not operate the unit with any or all cabinet panels

removed.

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.

Vertiv | Liebert® CW™ Installer/User Guide

WARNING! Risk of improper wire sizing/rating and loose electrical connections. Can cause

overheated wire and electrical connection terminals resulting in smoke, fire, equipment and

building damage, injury or death. Use correctly sized copper wire only and verify that all

electrical connections are tight before turning power On. Check all electrical connections

periodically and tighten as necessary.

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.

CAUTION: Risk of exposure to harmful noise levels. Can cause hearing injury or loss.

Depending on the installation and operating conditions, a sound pressure level greater than

70dB(A) may arise. Take appropriate technical safety measures. Operating personnel must

wear appropriate, OSHA-approved PPE and observe all appropriate hearing-protection safety

requirements.

CAUTION: Risk of contact with hot surfaces. Can cause injury. The fan motor, and some

electrical components are extremely hot during unit operation. Allow sufficient time for them to

cool to a touch-safe temperature before working within the unit cabinet. Use extreme caution

and wear appropriate, OSHA-approved PPE when working on or near hot components.

CAUTION: Risk of smoke generation. Can cause fire suppression and alarm system activation,

resulting in injury during building evacuation and mobilization of emergency fire and rescue

services. Start-up operation of optional electric reheat elements can create smoke or fumes

that can activate the facility alarm and fire suppression system. Prepare and take appropriate

steps to manage this possibility. Before beginning initial start-up checks, make certain that unit

was installed according to the instructions in this manual. All exterior panels must be in place.

NOTICE

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.

Important Safety Instructions 3

NOTICE

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.

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.

Do not use galvanized pipe.

Vertiv | Liebert® CW™ Installer/User Guide

NOTICE

Risk of no-flow condition. Can cause equipment damage. Do not leave the water/coolant fluid-

supply 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.

NOTICE

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.

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.

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.

NOTICE

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.

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. Can cause unit damage.

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

contact damage.

Important Safety Instructions 5

Vertiv | Liebert® CW™ Installer/User Guide

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