Emerson Liebert CRV 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 C R 0 2 0 R A 1 C 7 S D 1 8 1 1 E L 1 0 P A User Manual

Liebert

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Precision Cooling
For Business-Critical Continuity™

Liebert

CRV

™

User Manual–60Hz, 24-Inch Wide, Air-Cooled, Water/Glycol-Cooled and Chilled Water

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Table of contents

Document Outline

Model Number Nomenclature - 25 Digit Configuration Number
Important Safety Instructions
Save These Instructions
1.0 Liebert CRV Component Location
- Figure 1 Component location, common components—All models
- Figure 2 Component location - Liebert CR035RA, CR020RA air-cooled units
- Figure 3 Component location - Liebert CR035RW, CR020RW water/glycol-cooled units
- Figure 4 Component location - Liebert CR040RC chilled water units
- Figure 5 Overall dimensions / service area
- Table 1 Dry weight, all model types, ± 5%
2.0 Introduction
- 2.1 Product Description
  - Figure 6 Liebert CRV, front and rear views
3.0 Inspection and Unpacking
- 3.1 Equipment Inspection
  - 3.1.1 Packing Material
- 3.2 Handling
- 3.3 Moving the Unit Using Rigging
  - Figure 9 Moving the unit using rigging
- 3.4 Unpacking the Liebert CRV
  - Figure 10 Unpacking the Liebert CRV
- 3.5 Removing the Unit from the Skid
  - Figure 11 Removing the unit from the skid
- 3.6 Reattach the Baffle Panel
4.0 Prepare the Liebert CRV for Installation
- Figure 12 Adjust leveling feet
5.0 Piping
- 5.1 Fluid Connections
6.0 Refrigerant Connections
- 6.1 Piping Guidelines—Air-Cooled Units
- 6.2 Refrigerant Piping—Air-Cooled Models
- 6.3 Vacuum and Refrigerant Charge
7.0 Water Connections
- Table 16 Water connection options
- Table 17 Volume of CRV internal water circuits
- 7.1 Water Connections—Supply Humidifier and Drain Water, All Models
  - Figure 19 Water connection points, bottom entry
- 7.2 Glycol Mixture
  - Table 18 Glycol mixtures
- 7.3 Water Connections: Water/Glycol-Cooled Models
  - 7.3.1 Notes for Open-Circuit Applications
  - 7.3.2 Notes for Closed-Circuit Applications
- 7.4 Chilled Water Connections: Chilled Water Units
8.0 Electrical Connections
- 8.1 Electrical connections
- 8.2 Protective Features of the Electrically Commutated Fans
- 8.3 Protective Features of Electrical Heaters
  - Figure 28 Electrical heating with temperature sensor protection
9.0 Startup
- 9.1 Initial Startup
  - Checks to Perform after Startup
- 9.2 Automatic Restart
  - Figure 29 Refrigerant line components
- 9.3 Chilled Water Valve: Chilled Water Models
  - Figure 30 Position of the chilled water valve actuator (for 2- or 3-way valve)
- 9.4 Adjust Baffles to Direct Air Properly
  - Figure 31 Adjust the baffles to ensure correct airflow direction
  - Figure 32 Adjust air-blocking plate
- 9.5 Remote Rack Sensor Wiring
10.0 Liebert iCOM® Control
- Table 22 Keyboard icons and functions
- Figure 42 Liebert iCOM® default screen symbols
- 10.1 Navigating Through the Liebert iCOM Menus
- 10.2 Liebert iCOM® Display Readout
  - Figure 48 Liebert CRV system screen
  - Figure 49 Liebert iCOM® menu components for Liebert CRV
- 10.3 Liebert iCOM® Control Setup
  - Figure 50 Setpoint screen
  - Table 25 Controlling sensor settings
- 10.4 Event Log
- 10.5 Spare Part List
- 10.6 Wellness—Next Maintenance Calculation
  - 10.6.1 Calculation of Next Maintenance and Diagnostics
    - Calculating Unit Wellness
    - Parameters for Next Maintenance Calculation
- 10.7 Liebert CRV Operation—Liebert iCOM® Control
- 10.8 Liebert iCOM® User Menu Screens
- 10.9 Liebert iCOM® Service Menu Screens
11.0 Operation in Teamwork Mode
- 11.1 Unit-to-Unit Network Wiring
- 11.2 Liebert iCOM U2U Ethernet Network
- 11.3 Wiring a Liebert iCOM® U2U Network
  - Figure 91 U2U network setup diagram
  - Wall-Mount Large Display
    - Figure 92 Wiring a large display for U2U network operation
- 11.4 Teamwork Modes
12.0 Operation
- Figure 95 Return air temperature and humidity sensor viewed from the rear of the unit
- 12.1 Alarms/Events
13.0 Calibration and Regulation after Startup
- 13.1 Thermostatic Expansion Valve
  - 13.1.1 Determine Suction Superheat
  - 13.1.2 Adjust Superheat Setting with the TEV
- 13.2 Environmental Protection
14.0 Maintenance
- 14.1 Safety Instructions
- 14.2 Spare Parts
- 14.3 Maintenance Schedule
  - Table 28 Maintenance schedule
- 14.4 Inspect and Replace the Air Filter
- 14.5 Condensate Drain and Condensate Pump Systems
  - 14.5.1 Condensate drain
  - 14.5.2 Condensate Pump, Dual-Float
    - Figure 99 Condensate pump
- 14.6 Air-Cooled Condenser and Drycoolers
- 14.7 Electrical Heaters
- 14.8 Dismantling the Unit
- 14.9 F-Gas Regulation (EC) No. 842/2006
15.0 Troubleshooting
- Table 29 Unit diagnostics
- Table 30 Liebert iCOM® medium control board DIPswitch settings
Appendix A - Humidifier
- A.1 Principal of Operation
- A.2 Remote Rack Sensor Troubleshooting
  - Figure 103 CAN bus and Ethernet cable wiring
- A.3 Starting Point
  - Table 31 Humidifier troubleshooting
Appendix B - Electrical Data
- Table 32 Liebert CRV electrical data - 60Hz (Amps)
- Table 33 Calibration of electrical components
Appendix C - Electrical Field Connections Descriptions
- C.1 Standard Electrical Connections
- C.2 Electrical Connections for Optional Features
  - Figure 104 Electrical field connections
Appendix D - Refrigeration and Hydraulic Circuits
- Figure 105 General arrangement—air-cooled units
- Figure 106 General arrangement—water-glycol units
- Figure 107 General arrangement—chilled water

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