Vertiv Liebert CW Series Guida utente

Liebert®

CW™ThermalManagementSystem

Installer/UserGuide

38to 400kW(10 to 114 ton) Capacity, UpflowandDownflow, 50Hzand60Hz

Vertiv | Liebert® CW™Installer/User Guide

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

The informationcontained 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 informationor 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 informationowned 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.

TABLE OF CONTENTS

Important Safety Instructions 5

1 Nomenclature and Components 11

1.1 Liebert CWModel-number Nomenclature 11

1.2 Component Location 13

2 Pre-installation PreparationandGuidelines 15

2.1 Planning Dimensions 16

2.2 Location Considerations 17

2.3 Air-distribution Considerations for Downflow Units 17

2.4 Air-distribution Considerations for Upflow Units 19

2.5 Connections and System Setup 20

2.6 Operating Conditions 20

2.6.1 Cooling, Dehumidificationand Humidification 21

2.6.2 Heating 21

2.7 Shipping Dimensions and Unit Weights 21

3 Equipment Inspection and Handling 23

3.1 Packaging Material 24

3.2 Handling the Unit while Packaged 24

3.3 Unpacking the Unit 25

3.3.1 Removing the Unit from the Skid with a Forklift 25

3.3.2 Removing the Unit from theSkid Using Rigging 26

3.3.3 Moving the Unit to the InstallationLocationUsing PianoJacks 28

3.4 Placing the Unit on a Floor Stand 30

4 Piping Requirements 31

4.1 Drain and Humidifier Fluid Connections 32

4.1.1 Field-installed, Gravity-fed Drain Line Requirements 33

4.1.2 Condensate-pump Drain Line Requirements 35

4.1.3 Water Supply-line Requirements for the Optional Humidifier 35

4.2 Chilled-water Loop Piping Guidelines 36

4.2.1 Leak Checking for Unit and Field-installed Piping 37

5 Electrical Connections 39

6 EC Fans and Plenums 41

6.1 Downflow Units withEC Fans 41

6.1.1 Lowering the EC Fans into the Floor Stand onDownflow Models 41

6.2 Upflow-unit Plenums with EC Fans 45

6.2.1 Assembly inspection 46

6.2.2 Assemble plenum rear and side panels 51

6.2.3 Place assembled panels and EC fans on top of unit 54

6.2.4 Wire the EC Fans 58

6.2.5 Install front panels on plenum 60

7 Checklist for Completed Installation 73

7.1 Moving and Placing Equipment 73

7.2 Electrical InstallationChecks 73

7.3 Piping InstallationChecks 73

7.4 Other InstallationChecks 73

8 Initial Start-up Checks andCommissioningProcedure ForWarrantyInspection 75

9 Troubleshooting 77

10 Maintenance 81

10.1 Filters 82

10.2 Blower Drive System—EC Fans 83

10.2.1 Protective Features 84

10.2.2 Fan Impellers and Bearings Maintenance 84

10.2.3 FanAssembly Troubleshooting 84

10.2.4 Removing EC Fans from Downflow Units 88

10.2.5 Removing EC Fans from Upflow Units 93

10.3 Blower Drive System—Forward-curved Blowers 96

10.3.1 Blower Motor Lubrication 97

10.3.2 Belt Inspection 97

10.3.3 Electronic Variable Speed Drive - Inverter 97

10.4 Infrared Humidifier Maintenance 98

10.4.1 Cleaning Humidifier Pan and Float Switch 98

10.4.2 Changing Humidifier Lamps 99

10.5 Condensate-drain and Condensate-pump System Maintenance 100

10.5.1 Condensate Drain 100

10.5.2 Condensate Pump 100

10.6 Facility Fluid and Piping Maintenance forWaterandGlycolSystems 101

11 Preventive Maintenance Checklist 103

Appendices 107

Appendix A: Technical Support and Contacts 107

Appendix B: Submittal Drawings 109

Vertiv | Liebert® CW™Installer/User Guide

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 onthe unit and in this manual.

Follow all installation, operationand 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 factory-supplied

disconnect switch is inside the unit. The line side of this switch contains live high-voltage. 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 5

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21. 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.

Do not operate upflow units without installing a plenum, duct work 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.

Vertiv | Liebert® CW™Installer/User Guide

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.

WARNING! Risk of very heavy 125-lb (56.7-kg) fan modules dropping downward suddenly. Can

cause injury or death.

Support fan modules before removing mounting hardware. Use caution to keep body parts out

of the fan modules pathway during repositioning. Only properly trained and qualified personnel

should work on this equipment.

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 handling heavy and lengthy parts. Can cause personal injury and equipment

damage. Cabinet panels can exceed 5 ft. (1.5 m) in length and weigh more than 35 lb. (15.9 kg).

Follow relevant OSHA lifting recommendations and consider using a two-person lift for safe

and comfortable removal and installation of cabinet panels. Only properly trained and qualified

personnel wearing appropriate, OSHA-approved PPE should attempt to remove or install

cabinet panels.

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.

Important Safety Instructions 7

CAUTION: Risk of contact with hot surfaces. Can cause injury. The electronics housing,

humidifier components, 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. Activating reheat during initial start-up may burn off

particulates from electric reheat elements. 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. Cancause 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.

Vertiv | Liebert® CW™Installer/User Guide

NOTICE

Risk of piping-system corrosionand freezing fluids. Cancause leaks resulting inequipment and expensive

building damage. Cooling coils, heat exchangers and piping systems are at highrisk of freezing and premature

corrosion. Fluids in these systems must contain an inhibitor to prevent premature corrosion.

The system coolant fluid must be analyzed by a competent fluid-treatment specialist before start up to

establishthe inhibitor level and evaluated at regularly scheduled intervals throughout the life of the system to

determine the patternof inhibitor depletion. The fluid complexity and variations of required treatment

programs make it extremely important to obtain the advice of a competent and experienced fluid-treatment

specialist and follow a regularly scheduled coolant-fluid system-maintenance program.

Fluid chemistry varies greatly as do the required additives, called inhibitors, that reduce the corrosive effect of

the fluids onthe piping systems and components.

The chemistry of the coolant fluid used must be considered, because some sources may contain corrosive

elements that reduce the effectiveness of the inhibited formulation. Sediment deposits prevent the formationof

a protective oxide layer onthe inside of the coolant system components and piping. The coolant fluid must be

treated and circulating throughthe system continuously to prevent the buildup of deposits and/or growth of

bacteria. Proper inhibitor maintenance must be performed to prevent corrosion of the system.

Consult fluid manufacturer for testing and maintenance of inhibitors.

Commercial-grade coolant fluid is generally less corrosive to the common metals of construction than water

itself. It will, however, assume the corrosivity of the coolant fluid from whichit is prepared and may become

increasingly corrosive withuse if not properly inhibited.

Vertiv recommends installing a monitored fluid-detection system that is wired to activate the automatic-

closure of field-installed coolant-fluid supply and returnshut-off valves toreduce 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 designambient temperature. Automotive antifreeze is

unacceptable and must NOTbe used inany glycol fluid system. Use only HVAC glycol solution that meets the

requirements of recommended industry practices. Do not use galvanized pipe.

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 formationof a protective oxide

layer onthe inside of tubes. Keep unit switched Onand water/coolant fluid-supply circuit system operating

continuously.

Important Safety Instructions 9

NOTICE

Risk of clogged or leaking drain lines and leaking water-supply lines. Cancause equipment and building

damage.

This unit requires a water drain connection. Drainlines must be inspected at start-up and periodically, and

maintenance must be performed to ensure that drainwater runs freely throughthe drainsystem and that lines

are clear and free of obstructions and ingood conditionwithnovisible sign of damage or leaks. Thisunit 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 canresult incatastrophic 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. Cancause unit and/or structure damage. The unit may be toolarge to fit

througha doorway or hallway while onthe 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. Cancause 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. Cancause unit damage.

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

Vertiv | Liebert® CW™Installer/User Guide

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