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Vertiv Liebert CW - User Manual

Vertiv Liebert CW
76 pages
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Liebert®
CW™ ThermalManagementSystem
Installer/User Guide
305kW, 375kW, 415kW Capacity, 50/60Hz

Table of Contents

Questions and Answers

  • A
    andrea52Aug 3, 2025
    What to do if there is a risk of electric shock with Vertiv Liebert CW Control Unit?
    • D
      Dylan SandovalAug 3, 2025
      To avoid electric shock with the Vertiv Control Unit, take the following precautions: First, open all local and remote electric power supply disconnect switches, and use a voltmeter to confirm that the power is off before working within the fan-motor electric-connection enclosures. Then, wait 10 minutes after verifying that the power is off before working within the electric control/connection enclosures. Finally, ensure that only fully trained and qualified HVAC technicians perform maintenance on the fans.
  • J
    John RogersAug 7, 2025
    What to do if there is a risk of contact with high-speed rotating fan blades in Vertiv Liebert CW?
    • L
      lindsaysmithAug 7, 2025
      If there is a risk of contact with high-speed rotating fan blades, take these steps: open all local and remote electric power-supply disconnect switches and verify with a voltmeter that power is off. Also, make sure that all fan blades have stopped rotating before working in the unit cabinet or on the fan assembly. Never operate the unit with any or all cabinet panels removed.
  • M
    Michelle MitchellAug 13, 2025
    What to do if there is a risk of improper power-supply connection in Vertiv Control Unit?
    • R
      Richard WatkinsAug 13, 2025
      To avoid an improper power-supply connection with the Vertiv Control Unit: Ensure that power sources are correctly adjusted to the nameplate voltage and frequency of all equipment to be connected. Power-source voltages should be stabilized and regulated to within ±10% of the load nameplate nominal voltage. Make sure that no three-phase sources are single-phased at any time.
  • M
    Mark NguyenAug 17, 2025
    What to do if there is a risk of contact with hot surfaces on Vertiv Liebert CW?
    • D
      Derek NealAug 18, 2025
      If there is a risk of contact with hot surfaces on the Vertiv Control Unit, allow sufficient time for the surfaces to cool to a touch-safe temperature before working within the unit cabinet. Also, use extreme caution and wear appropriate, OSHA-approved PPE when working on or near hot components.
  • L
    loganjackAug 22, 2025
    Why there is a risk of unexpected fan blade movement in Vertiv Liebert CW Control Unit?
    • J
      Joshua PachecoAug 23, 2025
      Be aware of the risk of unexpected fan blade movement with the Vertiv Control Unit. Do not assume that the fan blades will not start to spin. Once the fault condition is cleared, there are certain conditions in which the motor will automatically resume operation.
  • M
    Mary FieldsAug 28, 2025
    How to handle risk of exposure to harmful noise levels from Vertiv Control Unit?
    • J
      Jesus JohnsonAug 28, 2025
      To handle the risk of exposure to harmful noise levels from the Vertiv Control Unit, take appropriate technical safety measures. Operating personnel must wear appropriate, OSHA-approved PPE and observe all appropriate hearing-protection safety requirements.

Summary

Nomenclature and Components

Liebert CW Model-number Nomenclature

Details each digit of the configuration number for Liebert CW units and components.

Component Location

Describes unit component locations using submittal documents and relevant tables.

Pre-installation Preparation and Guidelines

Planning Dimensions

Details unit, floor stand, and plenum dimensions from submittal documents.

Connections and System Setup

Covers drain, water connections, and seismic requirements for unit setup.

Operating Conditions

Defines the recommended operating envelope for Liebert CW units.

Shipping Dimensions and Unit Weights

Provides domestic and export shipping dimensions and weights for units and fan sections.

Equipment Inspection and Handling

Handling the Unit while Packaged

Provides instructions for transporting the unit using forklifts, cranes, slings, and spreader bars.

Unpacking the Unit

Guides on removing domestic and export packaging from the unit.

Removing the Unit from the Skid

Details steps for detaching the unit from its skid using socket drivers and corner brackets.

Electrical Connections

Electrical Field-connection Drawings

Lists relevant documents for electrical field connections and unit-to-unit networking.

Piping Requirements

Drain Fluid Connections

Covers requirements for the unit's water drain connection and related pipe connections.

Field-installed, Gravity-fed Drain Line Requirements

Details requirements for installing and routing gravity-fed drain lines to prevent backups.

Condensate-pump Drain Line Requirements

Specifies requirements for drain lines when a condensate pump is used.

Chilled-water Loop Piping Guidelines

Provides guidelines for installing chilled-water loop piping, including fluid chemistry.

Leak Checking for Unit and Field-installed Piping

Explains procedures for checking fluid systems for leaks during installation.

Checklist for Completed Installation

Moving and Placing Equipment

Checks for proper unpacking, material verification, and secure placement of equipment.

Electrical Installation Checks

Verifies correct voltage, wiring, grounding, and blower rotation for electrical setup.

Piping Installation Checks

Confirms loop completion, leak checks, flushing, sizing, support, and drain connections.

Other Installation Checks

Checks ducting, filters, motor fasteners, and fan debris for installation completeness.

Initial Start-up Checks and Commissioning Procedure For Warranty Inspection

Maintenance

Filters

Covers filter installation and replacement, emphasizing Vertiv filters for performance.

Replacing the Filters

Details accessing and replacing air filters from the front side of the unit's fan plenum.

Fan Maintenance

Addresses fan assembly troubleshooting and safety precautions during maintenance.

Condensate-drain and Condensate-pump System Maintenance

Outlines maintenance for condensate drain and pump systems.

Preventive Maintenance Checklist

Evaporator;Filters Maintenance

Checklist items for evaporator and filter maintenance, including cleaning and replacement.

Blower Section Maintenance

Checklist items for blower section maintenance, including bearings, motors, and amp draw.

Condensate Pump Maintenance

Checklist items for condensate pump maintenance, focusing on sump, floats, and discharge valve.

Electrical Panel Maintenance

Checklist items for electrical panel maintenance, including fuses, contactors, and wire connections.

Appendices

Appendix A: Technical Support and Contacts

Provides contact information for Vertiv technical support and service in the United States.

Appendix B: Submittal Drawings

Lists submittal drawings organized by topic/application, including document numbers and titles.

Vertiv Liebert CW Specifications

General IconGeneral
Frequency50/60 Hz
Communication ProtocolModbus, BACnet
Humidity Range20-80% RH (non-condensing)
DimensionsVaries by model
WeightVaries by model

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