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Vertiv Liebert CRV Application Manual
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Vertiv Liebert CRV Application Manual

Vertiv Liebert CRV Application Manual

Air-cooled, water/glycol-cooled and chilled water, 50 & 60hz
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Liebert® CRV™
Air-Cooled, Water/Glycol-Cooled and Chilled Water,
50 & 60Hz
Application Guide

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Summary of Contents for Vertiv Liebert CRV

  • Page 1 Liebert® CRV™ Air-Cooled, Water/Glycol-Cooled and Chilled Water, 50 & 60Hz Application Guide...
  • Page 2 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.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS 1 What is the Liebert CRV? 1.1 Liebert CRV Intended Application 2 Liebert CRV Controls 2.1 Liebert CRV Sensor Location Guidelines 3 General Liebert CRV Guidelines 4 Site Application and Unit Placement Vertiv | Liebert® CRV™ Application Guide |...
  • Page 4 Vertiv | Liebert® CRV™ Application Guide |...

  • Page 5: What Is The Liebert Crv

    1 WHAT IS THE LIEBERT CRV? The Liebert CRV is a Precision Cooling unit intended to be located within a row of heat-generating IT equipment racks. The Liebert CRV provides all the necessary functions of a precision air conditioner including cooling, humidification, dehumidification, air filtration and condensate management. Air enters the Liebert CRV unit from the hot aisle.
  • Page 6 Figure 1.1 Liebert CRV—front and rear views Vertiv | Liebert® CRV™ Application Guide |...

  • Page 7: Liebert Crv Controls

    2 LIEBERT CRV CONTROLS The Liebert CRV is equipped with the latest in Liebert iCOM controls. Available in every Liebert CRV is a return temperature and humidity sensor, a supply temperature sensor and three remote rack sensors with the option to add an additional seven remote rack sensors. Each rack sensor takes two temperature readings and can be configured to report either the average or the higher of the two sensors.

  • Page 8: Liebert Crv Sensor Location Guidelines

    2.1 Liebert CRV Sensor Location Guidelines Three rack sensors come with the Liebert CRV unit to help prevent any problem spots in the row. Rack sensors help combat cooling problems related to recirculation of air, uneven rack loading and air distribution.

  • Page 9: General Liebert Crv Guidelines

    Locate the Liebert CRV appropriately to effectively deliver cooling to the rack row. The application of a Liebert CRV is meant to provide cooling to between two and six racks of equipment in a single row. A row of equipment longer than six racks might not receive the appropriate quantity of conditioned air from a single Liebert CRV unit.
  • Page 10 This page intentionally left blank. Vertiv | Liebert® CRV™ Application Guide |...

  • Page 11: Site Application And Unit Placement

    NOTE: It is not ideal to place the Liebert CRV in the middle of a single rack row. Middle placement may create hot spots at the top of the rack equipment, due to inconsistent air coverage.
  • Page 12 Scenario 2: Double Equipment Row When using a Liebert CRV with double rack rows, location of the Liebert CRV unit is similar to the single- row placement. Locate the Liebert CRVs at opposite ends of the two rows and adjust the air baffles in the direction of desired cooling.
  • Page 13 This scenario can also work in a lead/lag operation or duty cycle scenario, by running a single Liebert CRV to match the load with the secondary unit in standby. Two or more Liebert CRVs can be networked together for teamwork, lead/lag or cascade operation.
  • Page 14 Liebert CRVs at the ends of the rows and directing their airflow inward towards the equipment row, as shown. Operating all four Liebert CRV units at partial load or two units at full load with two in standby is recommended for unit redundancy. Furthermore, it is suggested that when utilizing this configuration, Liebert CRVs at opposite ends of the rows should be in operation, to deliver the most effective coverage to the equipment.
  • Page 15 The Liebert CRV is most effective when the cold aisle can be contained by a natural or manufactured obstruction opposite to the face of the unit. As can be seen in this layout, a single Liebert CRV is positioned at the end of a rack row that is parallel to a room wall. The wall opposing the row equipment acts as a containment barrier supporting pressurization of the cold aisle.
  • Page 16 Containment solution or similar products. Utilizing the Liebert CRV in conjunction with cold-aisle containment products does not limit the location of the Liebert CRV with respect to the rack row. The Liebert CRV can be located anywhere within the equipment row, with the unit’s discharge air baffle directed as the equipment airflow needs demand.
  • Page 18 VertivCo.com | Vertiv Headquarters, 1050 Dearborn Drive, Columbus, OH, 43085, USA © 2017 Vertiv Co. All rights reserved. Vertiv and the Vertiv logo are trademarks or registered trademarks of Vertiv Co. All other names and logos referred to are trade names, trademarks or registered trademarks of their respective owners. While every precaution has been taken to ensure accuracy and completeness herein, Vertiv Co.