Emerson Liebert User Manual

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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

™

MODEL NUMBER NOMENCLATURE - 25 DIGIT CONFIGURATION NUMBER

Model # Part 1 * Model Details Model # Part 2 *

12345678910111213141516171819202122232425

CR0 2 0 RA1 C 7 S D 1 8 1 1 E L 1 0 P A * * *

Digits 1-2 - Unit Family Digit 17 - High-Voltage Options

Digits 3-5 - Nominal Capacity, kW

Digit 6

Digit 7 - System Type

Digit 8 - Fan Type H = Reheat and Humidifier Lockout

Digit 9 - Power Supply

Digit 10 - Cooling System

Digit 11 - Humidifier 2 = (2) Web Cards

Digit 12 - Display Type 5 = (1) Web Card and (1) 485 Card

Digit 13 - Reheat D = (1) Liebert SiteLink-E Card and (1) Web Card

Digit 14 - Air Filter G = (2) Building Management Cards

Digit 15 - Water/Glycol Valve Type

Digit 16 - Unit Color P = Domestic

* The 14-digit model number consists of the first 10 digits and last four digits of the Configuration Number. ** L and 5 for CW models; A and E for DX models.

Liebert

CRV™ = CR

L or A = NO dual-float condensate pump (for units without

humidifier), 5kA SCCR**

DX = 020, 035 CW = 040

5 or E = Dual-float condensate pump (for units with or

without humidifier), 5kA SCCR**

M = No dual-float condensate pump (for units without

R = Row-Based, 1100mm unit depth

humidifier), 65kA SCCR, 600 series only

P = Dual-float condensate Pump (for units with or without

A = Air Cooled

humidifier), 65kA SCCR, 600 series only

W = Water\Glycol Cooled Digit 18 - Option Package C = Chilled Water Cooled 0 = None

Variable Speed EC Plug Fans = 1

C = Reheat and Humidifier Lockout Additional Alarm

Contact

A = 460V / 3ph / 60Hz D = Low Sound Package (20kW and 35kW only) C = 208V / 3ph / 60Hz

L = Low Sound Package & Reheat and Humidifier Lockout

and Additional Alarm Contact (20kW and 35kW only)

2 = Two-Way Valve (CW Only) Digit 19 - Liebert IntelliSlot

Housing

3 = Three-Way Valve (CW Only) 0 = No Cards 7 = R-410A Digital Scroll Single Circuit (DX Only) 1 = (1) Web Card

0 = None 3 = (1) 485 Card S = Steam Generating Canister 4 = (2) 485 Cards

D = Liebert iCOM Control with Large Graphic Display C = (1) Liebert SiteLink-E Card

0 = None E = (1) Liebert SiteLink-E Card and (1) IS-485 Card 1 = Electric Reheat F = (1) Building Management Card

8 = 4" MERV 8 + Clogged Filter Alarm H = (1) Building Management Card and (1) Web Card 9 = 4" MERV 11 + Clogged Filter Alarm J = (1) Building Management Card and (1) IS-485 Card

K = (1) Building Management Card and (1) Liebert

1 = Two-Way Valve (W/G only) OR

Default Air-Cooled Selection

SiteLink-E Card

Digit 20 - Future Options

7 = Three-Way Valve (W/G only) 0 = None H = Default CW Selection Digit 21 - Packaging

1 = Standard Color (Z-7021 Black) S = Export (Seaworthy) 2 = Non-Standard Color Digit 22 - Special Features

A = No SFAs, Standard Unit X = SFA Included

Digits 23-25 - Factory Configuration Number

TABLE OF CONTENTS

1.0 LIEBERT CRV COMPONENT LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

2.1 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.0 INSPECTION AND UNPACKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

3.1 Equipment Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.1.1 Packing Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.2 Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.2.1 Handling the Unit While it is Packaged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.3 Moving the Unit Using Rigging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.4 Unpacking the Liebert CRV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.5 Removing the Unit from the Skid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.6 Reattach the Baffle Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.0 PREPARE THE LIEBERT CRV FOR INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

5.0 PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

5.1 Fluid Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.1.1 Condensate Piping—Field-Installed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.1.2 Humidifier Supply Water—Optional Steam Generating Canister . . . . . . . . . . . . . . . . . . . . . 15

5.1.3 Requirements of Systems Using Water or Glycol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

6.0 REFRIGERANT CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

6.1 Piping Guidelines—Air-Cooled Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6.2 Refrigerant Piping—Air-Cooled Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6.2.1 General Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.2.2 Pipe Diameter and Thickness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

6.2.3 Installing Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

6.3 Vacuum and Refrigerant Charge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6.3.1 Evacuation Air-Cooled Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

7.0 WATER CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

7.1 Water Connections—Supply Humidifier and Drain Water, All Models . . . . . . . . . . . . . . . . 29

7.2 Glycol Mixture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7.3 Water Connections: Water/Glycol-Cooled Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7.3.1 Notes for Open-Circuit Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7.3.2 Notes for Closed-Circuit Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7.4 Chilled Water Connections: Chilled Water Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

8.0 ELECTRICAL CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

8.1 Electrical connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

8.1.1 Power Supply Cable Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

8.2 Protective Features of the Electrically Commutated Fans . . . . . . . . . . . . . . . . . . . . . . . . . . 39

8.3 Protective Features of Electrical Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

9.0 STARTUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

9.1 Initial Startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

9.2 Automatic Restart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

9.3 Chilled Water Valve: Chilled Water Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

9.4 Adjust Baffles to Direct Air Properly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

9.5 Remote Rack Sensor Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

9.5.1 DIP Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

9.5.2 Set 2T Rack Sensor Identities—DIP Switch settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

9.5.3 Terminating the Last 2T Sensor on a Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

9.5.4 Route the CAN bus wire into the cooling unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

9.5.5 Installing 2T sensors on racks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

9.5.6 Remote Rack Sensor Operation and Rack View Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

10.0 LIEBERT ICOM® CONTROL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

10.1 Navigating Through the Liebert iCOM Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

10.1.1 Control Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

10.1.2 Accessing Submenus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

10.1.3 Entering a Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

10.1.4 Viewing Multiple Units with a Networked Large Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

10.2 Liebert iCOM® Display Readout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

10.3 Liebert iCOM

10.4 Event Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

10.5 Spare Part List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

10.6 Wellness—Next Maintenance Calculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

10.6.1 Calculation of Next Maintenance and Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

10.7 Liebert CRV Operation—Liebert iCOM® Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

10.7.1 Cooling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

10.7.2 Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

10.7.3 Air Flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

10.7.4 Humidification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

10.8 Liebert iCOM® User Menu Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

10.9 Liebert iCOM

Control Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Service Menu Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

11.0 OPERATION IN TEAMWORK MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97

11.1 Unit-to-Unit Network Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

11.2 Liebert iCOM U2U Ethernet Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

11.3 Wiring a Liebert iCOM

U2U Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

11.4 Teamwork Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

11.4.1 Application of Teamwork Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

11.4.2 No Teamwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

11.4.3 Teamwork Mode 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

11.4.4 Teamwork Mode 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

11.4.5 Standby—Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

12.0 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103

12.1 Alarms/Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

13.0 CALIBRATION AND REGULATION AFTER STARTUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

13.1 Thermostatic Expansion Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

13.1.1 Determine Suction Superheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

13.1.2 Adjust Superheat Setting with the TEV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

13.2 Environmental Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

14.0 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107

14.1 Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

14.2 Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

14.3 Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

14.4 Inspect and Replace the Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

14.5 Condensate Drain and Condensate Pump Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

14.5.1 Condensate drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

14.5.2 Condensate Pump, Dual-Float. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

14.6 Air-Cooled Condenser and Drycoolers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

14.7 Electrical Heaters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

14.8 Dismantling the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

14.9 F-Gas Regulation (EC) No. 842/2006 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

15.0 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

APPENDIX A-HUMIDIFIER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .116

A.1 Principal of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

A.1.1 Humidifier Water Supply and PlumbingHumidifier Water Supply and Plumbing . . . . . . . 117

A.1.2 Humidifier Water ConnectionHumidifier Water Connection . . . . . . . . . . . . . . . . . . . . . . . . 117

A.1.3 Humidifier Startup and OperationHumidifier Startup and Operation . . . . . . . . . . . . . . . . 118

A.1.4 Low Water ConductivityLow Water Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

A.1.5 Cylinder ReplacementCylinder Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

A.1.6 Humidifier TroubleshootingHumidifier Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

A.2 Remote Rack Sensor Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

A.3 Starting Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

APPENDIX B-ELECTRICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

APPENDIX C-ELECTRICAL FIELD CONNECTIONS DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . 124

C.1 Standard Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

C.2 Electrical Connections for Optional Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

APPENDIX D-REFRIGERATION AND HYDRAULIC CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .126

FIGURES

Figure 1 Component location, common components—All models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Figure 2 Component location - Liebert CR035RA, CR020RA air-cooled units. . . . . . . . . . . . . . . . . . . . . . . . 4

Figure 3 Component location - Liebert CR035RW, CR020RW water/glycol-cooled units . . . . . . . . . . . . . . . 5

Figure 4 Component location - Liebert CR040RC chilled water units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 5 Overall dimensions / service area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 6 Liebert CRV, front and rear views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 7 Liebert CRV center of gravity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 8 Recommended unit handling equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 9 Moving the unit using rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 10 Unpacking the Liebert CRV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 11 Removing the unit from the skid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 12 Adjust leveling feet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 13 Gravity drain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 14 Top refrigerant piping connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 15 Bottom refrigerant piping connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 16 Pipeline air conditioner - condenser. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 17 Connections—air-cooled models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 18 Connections for vacuum creation and refrigerant charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Figure 19 Water connection points, bottom entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

iii

Figure 20 Chilled water connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 21 Chilled water circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 22 Air bleeding valve position CW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 23 Connections—water/glycol models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 24 Connections—chilled water models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 25 Recommended drycooler Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 26 Remove electrical panel and lower front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Figure 27 Power and control cable entry points and routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 28 Electrical heating with temperature sensor protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 29 Refrigerant line components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 30 Position of the chilled water valve actuator (for 2- or 3-way valve) . . . . . . . . . . . . . . . . . . . . . . . 42

Figure 31 Adjust the baffles to ensure correct airflow direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Figure 32 Adjust air-blocking plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Figure 33 Figure 2T rack sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Figure 34 DIP switches in 2T sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Figure 35 Setting 2T Sensor DIP Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Figure 36 Termination jumper setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Figure 37 2T rack sensors installed on neighboring racks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Figure 38 Rack setup screen, page 1 of 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Figure 39 Rack setup screen, page 2 of 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Figure 40 Rack setup screen, page 3 of 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Figure 41 Rack overview screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Figure 42 Liebert iCOM

default screen symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Figure 43 Entering a password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Figure 44 Menu tree—Large display, stand-alone. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Figure 45 Menu tree—Large display, networked. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Figure 46 User menu icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Figure 47 Service menu icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Figure 48 Liebert CRV system screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Figure 49 Liebert iCOM

menu components for Liebert CRV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Figure 50 Setpoint screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Figure 51 User menu icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Figure 52 Setpoints parameters screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Figure 53 Sensor data parameters screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Figure 54 Display setup parameters screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Figure 55 Total run hours parameters screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Figure 56 Service Menu Main Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Figure 57 Setpoints parameters screen - Page 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Figure 58 Setpoints parameters screen - Page 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Figure 59 Setpoints parameters screen - Page 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Figure 60 Setpoints parameters screen - Page 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Figure 61 Standby settings / lead-lag parameters screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Figure 62 Wellness basic settings screen- Page 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Figure 63 Wellness motor settings parameters screen - Page 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Figure 64 Wellness compressor 1 settings parameters screen - Page 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Figure 65 Wellness electric heater 1 settings parameters screen - Page 4. . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Figure 66 Wellness humidifier settings parameters screen - Page 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Figure 67 Diagnostics / service mode parameters screen - Page 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Figure 68 Diagnostics / service mode parameters screen - Page 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Figure 69 Diagnostics / service mode parameters screen - Page 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Figure 70 Diagnostics / service mode parameters screen - Page 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Figure 71 Diagnostics / service mode parameters screen - Page 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Figure 72 Diagnostics / service mode parameters screen - Page 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Figure 73 Set alarms parameters screen - Page 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Figure 74 Set alarms parameters screen - Page 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Figure 75 Set alarms parameters screen - Page 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Figure 76 Set alarms parameters screen - Page 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Figure 77 Sensor calibration / setup parameters - Page 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Figure 78 Sensor calibration / setup parameters - Page 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Figure 79 Sensor calibration / setup parameters - Page 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Figure 80 Sensor calibration / setup parameters - Page 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Figure 81 System / network setup parameters—System - Page 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Figure 82 System / network setup parameters—large display only System - Page 2 . . . . . . . . . . . . . . . . . . 89

Figure 83 System/Network setup parameters Unit- Page 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Figure 84 System/Network setup parameters Unit - Page 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Figure 85 Rack Overview, Page 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Figure 86 Rack Setup, Page 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Figure 87 Rack Setup, Page 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Figure 88 Rack Setup, Page 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Figure 89 Options setup parameters - Page 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Figure 90 Options setup parameters - Page 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Figure 91 U2U network setup diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Figure 92 Wiring a large display for U2U network operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Figure 93 Teamwork modes and sensor management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Figure 94 Teamwork Mode 1 with two cooling units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Figure 95 Return air temperature and humidity sensor viewed from the rear of the unit . . . . . . . . . . . . . 103

Figure 96 Air filter location and input power safety switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Figure 97 Remove the air filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Figure 98 Differential pressure switch tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Figure 99 Condensate pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Figure 100 General diagram—humidifier operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

Figure 101 Water connection to humidifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Figure 102 Sensor pins, cylinder plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Figure 103 CAN bus and Ethernet cable wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Figure 104 Electrical field connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Figure 105 General arrangement—air-cooled units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

Figure 106 General arrangement—water-glycol units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

Figure 107 General arrangement—chilled water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

TABLES

Table 1 Dry weight, all model types, ± 5% . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Table 2 Center of gravity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Table 3 Weights without packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Table 4 Shipping weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Table 5 Condenser positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 6 Liebert CRV position relative to the remote condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 7 Piping and refrigerant sizes for Liebert Lee-Temp Table 8 Recommended refrigerant line sizes for Liebert Lee-Temp condensers with

R-410A Cu, OD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 9 Piping and refrigerant sizes for Liebert air-cooled, VFD control condensers with

R-410A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Table 10 Recommended refrigerant line sizes for Liebert air-cooled, VFD control condensers

with R-410A, Cu, OD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Table 11 Unit connections, air-cooled models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 12 R-410A refrigerant and oil charge for air-cooled models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 13 Refrigerant charge 1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Table 14 Air-cooled condenser refrigerant charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 15 Refrigerant and oil charge for water-cooled models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 16 Water connection options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 17 Volume of CRV internal water circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 18 Glycol mixtures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Table 19 Unit connections, water/glycol-cooled models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Table 20 Unit connections, chilled water models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Table 21 DIP switch settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Table 22 Keyboard icons and functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Table 23 User menu icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Table 24 Service menu icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Table 25 Controlling sensor settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Table 26 Unit diary parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Table 27 Service contact info parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Table 28 Maintenance schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Table 29 Unit diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Table 30 Liebert iCOM

medium control board DIPswitch settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Table 31 Humidifier troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Table 32 Liebert CRV electrical data - 60Hz (Amps) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Table 33 Calibration of electrical components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

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condensers with R-410A. . . . . . . . . . . . . . . 21

IMPORTANT SAFETY INSTRUCTIONS

SAVE THESE INSTRUCTIONS

This manual contains important safety instructions that should be followed during the installation and maintenance of the Liebert CRV. Read this manual thoroughly before attempting to carry out any operations on the Liebert CRV, including installation and operation. Retain this manual for the entire service life of the Liebert CRV.

Only properly trained and qualified personnel should move, install or service this equipment.

Adhere to all warnings, cautions and installation, operating and safety instructions on the unit and in this manual. Follow all operating and user instructions.

Any operation that requires opening doors or equipment panels must be carried out only by properly trained and qualified personnel.

Each machine is equipped with an electric insulation device that allows the operator to work safely. Switch Off the machine with this electric insulation device before beginning any maintenance operation to eliminate remaining risks (electric shocks, burns, automatic restarting, moving parts and remote control).

The panel key supplied with the unit must be kept by the person responsible for maintenance. To identify the unit by model and serial number in order to obtain assistance or spare parts, locate the identification label on the outside of the unit.

Important Safety Instructions

A warning label on the front and back panels reminds users that:

• the Liebert CRV restarts automatically

• the main switch must be opened before opening the internal compartments for any operation.

WARNING

Risk of high temperatures, extreme cold and high-speed rotating fan blades. Can cause equipment damage, injury and death.

Disconnect all local and remote electrical power supplies, confirm that all fan blades have stopped rotating and allow the component temperatures to become safe for human contact before opening doors and/or removing protective covers and working within.

If the doors are opened immediately after the Liebert CRV has been switched Off:

• some components, such as electrical heaters, compressor, outlet area and outlet piping, may remain at high temperature about 212°F (100°C);

• some components, such as the evaporator, may remain at low temperature;

• fan blades may continue to rotate by inertia.

These residual risks are highlighted by warning labels on the Liebert CRV.

WARNING

Risk of explosive discharge from high-pressure refrigerant. Can cause injury and death. This unit contains fluids and gases under high pressure. Relieve pressure before working with

piping.

WARNING

Risk of hair, clothing and jewelry entanglement with high speed rotating fan blades. Can cause equipment damage, serious injury or death.

Keep hair, jewelry and loose clothing secured and away from rotating fan blades during operation.

1Liebert

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Important Safety Instructions

WARNING

Arc flash and electric shock hazard. Can cause injury and death. Disconnect local and remote power supplies and wear appropriate personal protective

equipment per NFPA 70E before working within. 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 iCOM

mode. Some internal components require and receive power even during the Unit Off mode of the

Liebert iCOM control. The factory-supplied optional disconnect switch is inside the unit. The line side of this switch

contains live hazardous voltage potential. Install and open a remote disconnect switch and verify with a voltmeter that live hazardous

voltage potential is not present inside the unit cabinet before working within. Refer to the unit electrical schematic.

Follow all national and local codes.

microprocessor does not isolate power from the unit, even in the Unit Off

WARNING

Risk of refrigerant system rupture or explosion from overpressurization. Can cause equipment damage, injury and death.

A pressure relief valve is required for compliance with the EU Pressure Equipment Directive and may be required for compliance with local codes. If a discharge pressure relief device is not provided with the condenser unit, the system installer must install one in the high side of the refrigerant circuit and rated for a maximum of:

• 675psig (46.5bar) for water/glycol-cooled units

• 700psig (48.3bar) for air-cooled units

A shutoff valve must not be installed between the compressor and the field-installed relief valve.

One or more additional pressure relief valves are required downstream of any and all field-installed isolation. Do not isolate any refrigerant circuits from overpressurization protection.

WARNING

Risk of top-heavy unit falling over. Can cause equipment damage, personal injury and death. Read all of the following instructions before attempting to move, lift or remove packaging

from the Liebert CRV.

CAUTION

Risk of sharp edges, splinters and exposed fasteners. Can cause personal injury. Only properly trained and qualified personnel wearing appropriate safety headgear, gloves,

shoes and glasses should attempt to move, lift or remove packaging from the Liebert CRV or prepare the unit for installation.

NOTICE

Risk of overhead interference. Can cause unit and/or building damage. The unit may be too tall to fit through a doorway while on the skid. Measure the unit and

doorway heights and refer to the installation plans prior to moving the unit to verify clearances.

NOTICE

Risk of improper storage, Can cause unit damage. Keep the unit upright, indoors and protected from dampness, freezing temperatures and

contact damage.

Liebert® CRV

™

Important Safety Instructions

NOTICE

Risk of water leakage. Can cause severe property damage and loss of critical data center equipment.

This unit requires a water drain connection. It may require an external water supply to operate the humidifier. Improper installation, application and service practices can result in water leakage from the unit.

Do not locate the Liebert CRV directly above any equipment that could sustain water damage. Emerson recommends installing monitored leak detection equipment for the unit and supply lines.

NOTICE

Risk of frozen fluids. Can cause equipment damage and building damage. Freezing system fluids can rupture piping. Complete system drain-down cannot be ensured.

When the field piping or unit may be exposed to freezing temperatures, charge the system with the proper percentage of glycol and water for the coldest design ambient.

Automotive antifreeze is unacceptable and must NOT be used in any glycol fluid system.

NOTICE

Risk of corrosion. Can cause equipment damage. Read and follow individual unit installation instructions for precautions regarding fluid

system design, material selection and use of field-provided devices. Liebert systems contain iron and copper alloys that require appropriate corrosion protection.

Contact a local water consultant regarding water quality, corrosion and freeze protection requirements.

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.

Preferably, surface waters that are classified as soft and are low in chloride and sulfate ion content should be employed. 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 (Union Carbide Ucartherm, Dow Chemical Dowtherm SR-1 and Texaco E.G. Heat Transfer Fluid 100), 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.

NOTICE

Risk of no-flow condition. Can cause equipment damage. Do not leave the unit 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 system pump operating.

NOTE

The Liebert indoor cooling unit has a factory-installed high pressure safety switch in the high side refrigerant circuit. A pressure relief valve is provided with Liebert Lee-Temp Consult your local building code to determine if the Liebert VFD condensers will require field-provided pressure-relief devices. A fusible plug kit for Liebert VFD condensers is available for field installation.

3Liebert

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condensers.

CRV

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1.0 LIEBERT CRV COMPONENT LOCATION

1 Liebert iCOM® control display

2 Electric box

3 Evaporator / CW coil

4 Condensate pump

5 Electric heaters

6 Humidifier distributor

Top humidifier water supply, condensate pump drain

8 Drain trays, two places

9 EC plug fans

10 Bottom electrical entrance

11 Serial tag inside door

12 Bottom condensate pump drain

13 Top electrical entrance

Supply air temperature sensor location (sensor not shown)

Front

Rear

1 Thermostatic expansion valve

2 Solenoid valve

3 Sight glass

4 Filter dryer

7 Humidity/temperature sensor

8 Humidifier

9 Top refrigerant connections

10 Bottom refrigerant connections

11 Bottom humidifier water supply

12 Air filters

13 Bottom drain

14 Compressor

15 Vibasorber

Rear

Front

Figure 1 Component location, common components—All models

Liebert CRV Component Location

Figure 2 Component location - Liebert CR035RA, CR020RA air-cooled units

Liebert® CRV

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Liebert CRV Component Location

1 Top water/glycol connections

2 Compressor

3 Brazed plate condenser

4 Bottom water/glycol connections

5 Water/glycol valve

6 Refrigerant receiver

7Air filters

8 Vibasorber

9 Thermostatic expansion valve

10 Sight glass

11 Filter dryer

12 Humidity/temperature sensor

13 Bottom humidifier water supply

1 Top CW connections

2Air filters

3 Three-way CW valve

4 Bottom CW connections

5 Humidifier

6 Humidity/temperature sensor

7 Bottom humidifier water supply

Figure 3 Component location - Liebert CR035RW, CR020RW water/glycol-cooled units

Figure 4 Component location - Liebert CR040RC chilled water units

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Figure 5 Overall dimensions / service area

Only front or back clearance required

B S

Rear

Access Required to Remove / Install Entire Unit Within The Row

12"

(305mm)

3-15/16" (100mm)

13-3/4"

(350mm)

25-9/16"

(650mm)

46-1/4"

(1175mm)

27-9/16"

(700mm)

21-5/8"

(550mm)

Cold Air

Hot Air

107-5/16"

25-9/16"

(650mm)

23-5/8"

(600mm)

3-15/16"

(100mm)

35-9/16"

(903mm)

23-5/8"

(600mm)

(75mm)

78-3/4"

(2000mm)

46-1/4"

(1175mm)

Air

Filters

Front

Door Fully Open

Top

DPN1791 Rev. 2

49"

(1245mm)

49"

(1245mm)

Liebert CRV Component Location

Liebert® CRV

Table 1 Dry weight, all model types, ± 5%

Model No.

CR020R 739 (335) 772 (350 — CR035R 805 (365) 849 (385) — CR040R — — 728 (330)

Source: DPN001791, Rev. 2

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Air Cooled

lb (kg)

Model Type

Water/Glycol

lb (kg)

Chilled Water

lb (kg)

2.0 INTRODUCTION

RearFront

2.1 Product Description

The Liebert CRV is a precision cooling unit available in compressorized (air-, water- or glycol-cooled) and chilled water configurations to be installed within a row of high-density computing racks in a “hot aisle-cold aisle” configuration.

Air enters the rear of the Liebert CRV from the hot aisle, is filtered, cooled and conditioned, then discharged into the cold aisle. The Liebert CRV provides all the necessary functions of a standard precision air conditioner, including cooling, heating, humidification, dehumidification, air filtration, condensate management, temperature control, alarm monitoring and data communication. The Liebert CRV is optimized for maximum cooling capacity in a minimal footprint.

Figure 6 Liebert CRV, front and rear views

Introduction

7Liebert

CRV

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3.0 INSPECTION AND UNPACKING

WARNING

Risk of top-heavy unit falling over. Can cause equipment damage, personal injury and death. Read all of the following instructions before attempting to move, lift or remove packaging

from the Liebert CRV.

CAUTION

Risk of sharp edges, splinters and exposed fasteners. Can cause personal injury. Only properly trained and qualified personnel wearing appropriate safety headgear, gloves,

shoes and glasses should attempt to move, lift or remove packaging from the Liebert CRV or prepare the unit for installation.

NOTICE

Risk of overhead interference. Can cause unit and/or building damage. The unit may be too tall to fit through a doorway while on the skid. Measure the unit and

doorway heights and refer to the installation plans prior to moving the unit to verify clearances.

NOTICE

Risk of improper storage. Can cause unit damage. Keep the unit upright, indoors and protected from dampness, freezing temperatures and

contact damage.

Inspection and Unpacking

3.1 Equipment Inspection

After the Liebert CRV unit arrives and before it is unpacked, verify that the delivered equipment matches the bill of lading. Examine the packaging for any signs of mishandling or damage. Inspect all items for damage, visible or concealed. Report any damage immediately to the carrier and file a damage claim. Send a copy of the claim to Emerson Network Power or your Emerson representative.

3.1.1 Packing Material

All material used to package this unit is recyclable. Please save this material for future use or dispose of it appropriately.

3.2 Handling

Figure 7 Liebert CRV center of gravity

Liebert® CRV

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Inspection and Unpacking

• Always keep the packaged Liebert CRV upright and never leave it outdoors.

• Be aware of the center of gravity indicated on the package and in Table 2 below:

Table 2 Center of gravity

Distance from lower right front corner, ± 2 in. (51m)

Model no.

CR020 20 (508) 12 (305) 28 (711)

CR035 20 (508) 12 (305) 32 (813)

CR040 21 (533) 12 (305) 32 (813)

The center of gravity on the Liebert CRV varies with the options and the model's size.

X, in. (mm) Y, in. (mm) Z, in. (mm)

Table 3 Weights without packaging

Model

No.

CR020

CR035

CR040

Electrical

Data

460/3/60 739 (335) 772 (350) —

208/3/60 739 (335) 772 (350) —

460/3/60 805 (365) 849 (385) —

208/3/60 805 (365) 849 (385) —

460/3/60 — — 728 (330)

208/3/60 — — 728 (330)

Air-Cooled Water/Glycol-Cooled Chilled Water

Weight ± 5%, lb (kg)

Table 4 Shipping weights

Model

No.

CR020 846 (384) 879 (399) — 953 (432) 986 (447) —

CR035 912 (414) 956 (434) — 1019 (462) 1063 (482) —

CR040 — — 835 (379) — — 942 (427)

Domestic Packaging, lb (kg) Export Packaging, lb (kg)

Air Water/Glycol Chilled Water Air Water/Glycol Chilled Water

3.2.1 Handling the Unit While it is Packaged

Figure 8 Recommended unit handling equipment

Forklift

Pallet Jack

• Transport the packaged unit using a forklift, pallet jack or by overhead lift with slings and spreader bars that are rated for the weight of the unit (see tables above).

• When using a forklift or pallet jack, make sure the forks (if adjustable) are spread to the widest allowable distance to still fit under the skid. Make sure the fork length is suitable for the skid length. Skid length is 60" (1524mm).

• Do not lift the packaged unit any higher than 4" (102mm). All personnel except those moving the Liebert CRV must be kept 12' (3.7m) or more from the unit while it is being moved.

• If the unit must be lifted higher than 4" (102mm) all personnel not directly involved in moving the Liebert CRV must be 20' (5m) or more from the unit.

Spreader Bars and Slings

9Liebert

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3.3 Moving the Unit Using Rigging

197023 Rev. 4

CAUTION

Risk of sharp edges, splinters and exposed fasteners. Can cause personal injury. Only properly trained and qualified personnel wearing appropriate safety headgear, gloves,

shoes and glasses should attempt to move, lift or remove packaging from the Liebert CRV or prepare the unit for installation.

1. Use a pallet jack or forklift to raise the packaged unit.

2. Place slings under the skid runners, equally spacing the slings to make sure the unit is balanced (see Figure 9).

3. Lower the unit and remove the pallet jack or forklift.

4. Connect the slings to the lifting device, using spreader bars or similar equipment to protect the unit (see Figure 9).

NOTE

Wrapping one or two more straps around the middle of the Liebert CRV will improve stability when it is lifted.

5. Move the unit to its installation location. Two or more properly trained and qualified personnel are required to move the Liebert CRV to its installation location.

6. Lower the Liebert CRV and remove the slings.

Inspection and Unpacking

Figure 9 Moving the unit using rigging

3.4 Unpacking the Liebert CRV

1. Remove the lag bolts securing ramp to skid.

2. Place the ramp and and the plastic bag with orange clips to the side for use in removing the unit from the skid.

3. Remove the stretch film and corner/side packaging planks from around the unit.

4. Remove the unit bag when ready to install the unit.

Liebert® CRV

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Figure 10 Unpacking the Liebert CRV

197023 Rev. 4

3.5 Removing the Unit from the Skid

WARNING

Risk of top-heavy unit falling over. Can cause equipment damage, personal injury and death. Read all of the following instructions before attempting to move, lift or remove packaging

from the Liebert CRV.

Inspection and Unpacking

CAUTION

Risk of sharp edges, splinters and exposed fasteners. Can cause personal injury. Only properly trained and qualified personnel wearing appropriate safety headgear, gloves,

shoes and glasses should attempt to move, lift or remove packaging from the Liebert CRV or prepare the unit for installation.

1. Open the top panel door with the mounted control (refer to Figure 11).

2. Remove the bottom baffle panel assembly by removing the screws with a T30 Torx screwdriver.

3. Set the baffle panel assembly aside until the Liebert CRV is ready for it to be to reattached.

4. Close and latch the top panel door.

5. Place the ramp against the skid as shown in Figure 11.

6. Remove the orange clips from the plastic bag.

7. Insert clips into holes of the skid and ramp.

8. Remove the eight bolts, four on each side, that secure side tie-down brackets to skid. Bolts can be removed using a 17mm socket wrench, open-end wrench or pliers.

9. Lower the four stabilizer feet until the side tie-down brackets no longer contact the skid.

10. Remove the six bolts, three on each side), that secure the side tie-down brackets to the unit base. The bolts can be removed using a 13mm socket wrench, open-end wrench or pliers.

11. Remove the side tie-down brackets.

12. Remove the eight bolts, four on each side, that secure the lift block to the skid. The bolts can be removed using a 17mm socket wrench, open-end wrench or pliers.

13. Remove the lift blocks from the skid.

14. Using the stabilizer feet, lower the unit to the skid.

15. Move the unit to its installation location. Two or more properly trained and qualified personnel are required to move the Liebert CRV to its installation location.

11 Liebert® CRV

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Figure 11 Removing the unit from the skid

4 Bolts on Each Side Secure the Tie-Down Bracket to the Skid

Step 5

197023 Rev. 4

Step 1

Step 8

Step 15

Inspection and Unpacking

3.6 Reattach the Baffle Panel

Once the Liebert CRV has been moved to where it will be installed, the baffle panel can be reattached.

1. Open top panel door (the one with the Liebert iCOM

2. Reattach the bottom baffle panel assembly with screws, using a T30 Torx drive.

3. Close and latch top panel door.

M17 Socket

M13 Socket

Liebert® CRV

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4.0 PREPARE THE LIEBERT CRV FOR INSTALLATION

Adjust the height of the feet

Tighten this nut after the foot is adjusted to the desired height

1. Open the display door and remove the lower front baffle panel using a 10mm nutdriver or T30 Torx Bit to prepare for installation.

2. Open the rear panel, referring to Figure 10. The documents are located inside the display door.

3. After the Liebert CRV is in its final installation position, adjust the four base supports, or feet, with an adjustable wrench. Ensure that the unit is level to avoid corrosion or health hazards caused by condensate accumulation.

a. Turning the base supports, or feet, clockwise, will extend them, lifting the unit one corner at a

time.

b. Tighten the nut on the top of each adjustable foot, inside the Liebert CRV, to lock the feet.

Figure 12 Adjust leveling feet

Prepare the Liebert CRV for Installation

13 Liebert® CRV

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5.0 PIPING

All fluid and refrigeration connections to the unit, with the exception of the condensate drain, are sweat copper. Factory-installed piping brackets must not be removed. Field-installed piping must be installed in accordance with local codes and must be properly assembled, supported, isolated and insulated. Avoid piping runs through noise-sensitive areas, such as office walls and conference rooms.

Refer to specific text and detailed diagrams in this manual for other unit-specific piping requirements.

All piping below the elevated floor must be arranged so that it offers the least resistance to airflow. Careful planning of the piping layout under the raised floor is required to prevent the airflow from being blocked. When installing piping on the subfloor, Emerson recommends installing the pipes in a horizontal plane rather than stacked one above the other. Whenever possible, the pipes should be run parallel to the airflow.

5.1 Fluid Connections

NOTICE

Risk of water leakage. Can cause severe property damage and loss of critical data center equipment.

Do not locate the Liebert CRV directly above any equipment that could sustain water damage. Emerson recommends installing monitored leak detection equipment for the unit and supply lines.

Piping

Liebert® CRV

™

5.1.1 Condensate Piping—Field-Installed

CORRECT

INCORRECT

UNIT

Internal Drain

External Drain

Continuous Downward Slope

Internal Drain

UNIT

External Drain

Internal Drain

External Drain

These are external traps also, although unintentional. Lines must be rigid enough not to bow over top of other objects.

INCORRECT

Do Not Externally Trap the Unit

DPN001556 Rev. 0

• Do not reduce drain lines

• Do not expose drain line to freezing temperatures

• Drain line may contain boiling water. Use copper or other suitable material

• Drain line must comply with local building codes

• Emerson recommends installing under-floor leak detection equipment

Gravity Drain—Units Without Factory-Installed Condensate Pump

• 3/4" FPT drain connection is provided on units without optional factory-installed condensate pump with infrared humidifier or no humidifier; 1-1/4" FPT connection is provided on units with steam generating humidifier

• Pitch the drain line toward the drain a minimum of 1/8" (3mm) per 1 foot (305mm) of length

• Drain is trapped internally. Do not trap the drain external to equipment

• Drain line must be sized for 2 gpm (7.6 l/m) flow

NOTICE

Risk of improper piping connections. Can cause damage to the equipment and to the building. The drain line has an internal trap and must not be trapped outside the unit or water may

back up into the drain pan and overflow the unit cabinet.

Figure 13 Gravity drain

Piping

Condensate Pump

• 1/2" copper sweat connection is provided on units with optional factory-installed condensate pump

• Condensate pump is rated for approximately 6 GPM (22.7 l/min) at 30 ft (9m) total head

• Size piping based on available condensate head

5.1.2 Humidifier Supply Water—Optional Steam Generating Canister

• 1/4" supply line; maximum water pressure is 145psi (1000kPa)

• Fill valve is sized for pressure range of 30 to 120psi (207-827kPa)

• Do not supply steam generating humidifier with softened water

• Do not use hot water source

• Water conductivity must be in the range of 330-670 micro-siemens

15 Liebert® CRV

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5.1.3 Requirements of Systems Using Water or Glycol

These guidelines apply to the field leak checking and fluid requirements for field piping systems, including Liebert chilled water, condenser (water or glycol) and drycooler circuits.

General Guidelines

• Equipment damage and personal injury can result from improper piping installation, leak checking, fluid chemistry and fluid maintenance.

• Follow local piping codes, safety codes.

• Qualified personnel must install and inspect system piping.

• Contact a local water consultant regarding water quality, corrosion protection and freeze protection requirements.

• Install manual shutoff valves at the supply and return line to each indoor unit and drycooler to permit routine service and emergency isolation of the unit.

NOTICE

Risk of frozen fluids. Can cause equipment damage and building damage. Freezing system fluids can rupture piping. Complete system drain-down cannot be ensured.

When the field piping or unit may be exposed to freezing temperatures, charge the system with the proper percentage of glycol and water for the coldest design ambient.

Automotive antifreeze is unacceptable and must NOT be used in any glycol fluid system.

Piping

NOTICE

Risk of corrosion. Can cause equipment damage. Read and follow individual unit installation instructions for precautions regarding fluid

system design, material selection and use of field-provided devices. Liebert systems contain iron and copper alloys that require appropriate corrosion protection.

Contact a local water consultant regarding water quality, corrosion and freeze protection requirements.

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 build up of sediment deposits and or growth of sulfate reducing bacteria.

Liebert® CRV

NOTICE

Risk of no-flow condition. Can cause equipment damage. Do not leave the unit 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 system pump operating.

™

Piping

Leak Checking of Unit and Field Piping

Liebert unit fluid systems are factory-checked for leaks and may be shipped with a nitrogen holding charge. Liebert unit fluid circuits should be checked for leaks at installation as described below.

NOTE

During leak checking of field-installed piping, Emerson recommends that the unit be isolated using field-installed shutoff valves. When the Liebert units are included in a leak test, use of fluid for pressure testing is recommended. When pressurized gas is used for leak testing the Liebert unit, the maximum recommended pressure is 30 psig (2 bars) and tightness of the unit should be verified by pressure decay over time, (<2 psig/hour [0.3 bars/hour]) or sensing a tracer gas with suitable instrumentation. Dry seals in fluid valves and pumps may not hold a high gas pressure.

17 Liebert® CRV

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6.0 REFRIGERANT CONNECTIONS

WARNING

Risk of explosive discharge from high-pressure refrigerant. Can cause injury or death. This unit contains fluids and/or gases under high pressure. Relieve pressure before working with piping.

WARNING

Risk of refrigerant system rupture or explosion from overpressurization. Can cause equipment damage, injury and death.

• 675psig (46.5bar) for water/glycol-cooled units

• 700psig (48.3bar) for air-cooled units A shutoff valve must not be installed between the compressor and the field-installed relief

valve. One or more additional pressure relief valves are required downstream of any and all

field-installed isolation. Do not isolate any refrigerant circuits from overpressurization protection.

Refrigerant Connections

NOTICE

Risk of oil contamination with water. Can cause equipment damage. The piping must not be open to the atmosphere for extended periods because the Liebert CRV

requires POE (polyol ester) oil. POE oil absorbs water at a much faster rate when exposed to air than previously used oils. Because water is the enemy of a reliable refrigeration system, extreme care must be used when opening systems during installation or service. If water is absorbed into the POE oil, it will not be easily removed and will not be removed through the normal evacuation process. If the oil is too wet, it may require an oil change. POE oils also have a property that makes them act as a solvent in a refrigeration system. Maintaining system cleanliness is extremely important because the oil will tend to bring any foreign matter back to the compressor.

The Liebert CRV can be connected to a condenser through either the top or bottom of the unit. The unit is piped for connections at the top of the unit as shown in Figure 14, with provision for connection through the bottom of the unit.

Connecting through the bottom of the unit requires cutting the liquid and suction lines as shown in Figure 15. Cutting these lines disconnects the top connections from the rest of the refrigeration system.

Air-cooled units are shipped with a holding charge of nitrogen.

Liebert® CRV

™

6.1 Piping Guidelines—Air-Cooled Units

If using bottom connections, cut the pipes just below the black pipe clamps

• Indoor unit ships with a nitrogen holding charge; do not vent the evaporator until all refrigerant piping is in place, ready for connection to the unit and condenser

• Use copper piping with high temperature brazed joints

• Isolate piping from building using vibration-isolating supports

• Refer to Tables 7 through 10 for piping sizes

• Refer to condenser installation manual for charging information

• Install traps on hot gas (discharge) lines at the base of vertical risers and every 15 feet (4.6m) of vertical rise.

• See Table 6 for the allowable elevation difference between the condenser and the Liebert CRV.

• Consult factory if piping run exceeds 300 feet (91m) equivalent length

• Keep piping clean and dry, especially on units with R-410A refrigerant

• Avoid piping runs through noise-sensitive areas

• Do not run piping directly in front of airstream of any air conditioner

• Refrigerant oil – do not mix oil types

Refer to ASHRAE Refrigeration Handbook for general, good-practice refrigeration piping.

6.2 Refrigerant Piping—Air-Cooled Models

Figure 14 Top refrigerant piping connections

Refrigerant Connections

Figure 15 Bottom refrigerant piping connections

19 Liebert® CRV

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6.2.1 General Layout

15 ft. (4.6m)

(See *)

Gas

Liquid

* Oil traps every 15 ft. (4.6m)

of vertical piping

Room Unit

(See **)

Liquid

Room Unit

(See**)

1. Piping must be Type ACR copper tubing and sized per Tables 7, 8, 9 and 10.

NOTE

All field-installed piping must comply with applicable national, state and local codes.

Use the shortest possible refrigeration pipelines to minimize the total charge of refrigerant and the number of pressure drops.

2. Minimize the number of bends and make the bends the largest radius practical to prevent constricting refrigerant flow.

3. Insulate the piping as specified in Table 5. If the pipes are installed next to electrical cables, they must be isolated from the building using vibration-isolating supports to avoid damage to cable insulation.

4. There must be at least one inch (25mm) separation between the gas and liquid pipelines. If this is not possible, insulate both lines.

5. Support both horizontal and vertical pipes with vibration-damping clamps, which include rubber gaskets. Place these clamps every 5 to 7 ft. (1.5 to 2m).

Table 5 Condenser positioning

Insulation

Condenser

Position

Discharge Line

Liquid Line

Indoor necessary necessary necessary

Outdoor only for aesthetic reasons only for aesthetic reasons only for aesthetic reasons

Indoor only for aesthetic reasons only for aesthetic reasons no (expose to cold under-floor air)

Outdoor only for aesthetic reasons only if exposed to sun only if exposed to sun

Condenser Above

Liebert CRV

Condenser and

Liebert CRV

at Same Level

Refrigerant Connections

Condenser Below

Liebert CRV

(Not Recommended)

Layout

** See Table 6

Table 6 Liebert CRV position relative to the remote condenser

Parameter Maximum Distances, ft. (m)

From Liebert CRV to condenser 300 (91.4) equivalent length

From Liebert CRV to VFD condenser Above: 60 (18.3) Below: 15 (4.5)

™

From Liebert CRV to Liebert Lee-Temp

Requirements

Oil traps on vertical line of gas refrigerant Every 15 (4.6)

condenser Above: 60 (18.3) Below: 0 (0)

Room Unit

Gas

Liquid

Liebert® CRV

™

Figure 16 Pipeline air conditioner - condenser

CDT

COND

(Distance) D = A + B + C

CDT = Conditioner COND = Condenser

6.2.2 Pipe Diameter and Thickness

WARNING

Risk of explosive discharge. Can cause equipment damage, injury or death. Use only Type ACR copper tubing sized per Tables 7, 8, 9 and 10 for pipes connecting the

Liebert CRV and the condensing unit.

Table 7 Piping and refrigerant sizes for Liebert Lee-Temp

Condenser Piping Connection Sizes

Condenser Connections, O.D., in.

Refrigerant Connections

™

condensers with R-410A

Liebert Lee-Temp Connections, I.D., in.

Liebert Lee-Temp

Condenser Model # Hot Gas Liquid

DCSL28K 1-1/8 7/8 9 x 36 (229 x 914) 1-1/8 5/8 7/8

DCSL60K 1-1/8 7/8 11 x 36 (279 x 914) 1-1/8 5/8 7/8

DCSL90K 1-1/8 7/8 11 x 48 (279 x 1219) 1-1/8 5/8 7/8

Source: DPN001623, Rev. 6, Page 3

Size, in. (mm)

Hot Gas

Tee

Liquid To L-T Valve

Receiver

Out

Table 8 Recommended refrigerant line sizes for Liebert Lee-Temp condensers with R-410A Cu, OD

Liebert CRV Model #

CR020RA

CR035RA

Consult factory for proper line sizing for runs longer than 300 ft. (91.4m) equivalent length. * Must downsize vertical riser one trade size (1-1/8” to 7/8” or 7/8” to 3/4”). Source: DPN001623, Rev. 6, Page 3

Total Equivalent

Length, ft. (m)

50 (15.2) 3/4 (19.1) 5/8 (15.9)

100 (30.5) 3/4 (19.1) 5/8 (15.9)

150 (45.7) 3/4 (19.1) 5/8 (15.9)

300 (91.4) 7/8 (22.2)* 3/4 (19.1)

50 (15.2) 7/8 (22.2) 3/4 (19.1)

100 (30.5) 7/8 (22.2) 3/4 (19.1)

150 (45.7) 7/8 (22.2) 3/4 (19.1)

300 (91.4) 1-1/8 (28.6)* 7/8 (22.2)

Hot Gas Line,

in. (mm)

Liquid Line,

in. (mm)

21 Liebert® CRV

™

Refrigerant Connections

Table 9 Piping and refrigerant sizes for Liebert air-cooled, VFD control condensers with R-410A

Condenser Piping Connection Sizes, Cu, O.D.

Condenser Model #

Entering Hot Gas

Line, in. (mm)

Returning Liquid

Line, in. (mm)

TCSV28K 1-1/8 (28.6) 7/8 (22.2)

TCSV60K 1-1/8 (28.6) 7/8 (22.2)

TCSV90K 1-1/8 (28.6) 7/8 (22.2)

Source: DPN001624, Rev. 5, Page 3

Table 10 Recommended refrigerant line sizes for Liebert air-cooled, VFD control condensers

with R-410A, Cu, OD

Liebert CRV Model #

Total Equivalent

Length, ft. (m)

Hot Gas Line,

in. (m)

Liquid Line,

in. (m)

50 (15.2) 3/4 (19.1) 5/8 (15.9)

CR020RA

100 (30.5) 3/4 (19.1) 5/8 (15.9)

150 (45.7) 3/4 (19.1) 5/8 (15.9)

300 (91.4) 7/8 (22.2)

3/4 (19.1)

50 (15.2) 7/8 (22.2) 3/4 (19.1)

CR035RA

1. Consult factory for proper line sizing for runs longer than 300 ft. (91.4m) equivalent length.

2. Must downsize vertical riser one trade size (1-1/8" to 7/8" or 7/8" to 3/4" ). Source: DPN001624, Rev. 5, Page 3

100 (30.5) 7/8 (22.2) 3/4 (19.1)

150 (45.7) 7/8 (22.2) 3/4 (19.1)

300 (91.4) 1-1/8 (28.6)

7/8 (22.2)

Liebert® CRV

™

6.2.3 Installing Piping

The following operations must be carried out by an experienced refrigeration technician.

NOTICE

Risk of oil contamination with water. Can cause equipment damage. The piping must not be open to the atmosphere for extended periods because the Liebert CRV

1. When installing the refrigerant piping, note the following:

•Brazing:

• All joints must be brazed.

• Avoid butt brazes by using couplings or swaging one of the pipes with a swaging tool.

• Ensure that all brazed joints are leak-free.

• Flow dry nitrogen through the pipes during brazing.

• Always use large-radius curves (bending radius at least equal to pipe diameter). Bend the pipes as follows:

• soft copper: bend by hand or use bending device;

• hard copper: use preformed curves.

• To minimize oxidation, avoid overheating the pipes when brazing.

2. Connect the pipes to the condenser:

• Condensers with butt-brazed pipe connections: Cut the pipe, enlarge it and braze it to the pipeline.

Respect the direction of refrigerant flow. (See labels on refrigerant.)

3. Wash out the pipelines as follows: a. Plug up the free ends of the pipes. b. Connect a helium or nitrogen cylinder, fitted with a reducer (max. pressure 10 bar), to the

1/4" SAE Schrader valve of the condenser. c. Pressurize the pipes with helium or nitrogen. d. Unplug the pipes instantaneously. e. Repeat Steps a through d several times.

This operation is especially important when hard copper piping is used.

4. Open all the shutoff valves on the room unit.

5. Discharge the room unit pressurized with helium (at 1 bar) by opening the charge valves so that all the branches of the circuit are discharged (e.g., on the receiver, on the low pressure side and on the compressor delivery).

6. Debraze the bottoms from the connections of the room unit.

7. Fix (braze) the pipes to the connections on the air conditioner.

8. Connect the refrigerant safety pressure relief valve to the outdoors with a 16 mm (5/8") copper pipe. Only water/glycol units have a indoor relief valve. Air cooled units do not have an indoor pressure relief valve.

Refrigerant Connections

23 Liebert® CRV

™

Figure 17 Connections—air-cooled models

LVT

GD or CP

Piping and electrical connections available at the top and bottom of unit. Air-cooled systems may require oil to be added in the field to allow sufficient compressor lubrication.

Top Connections

Unsolder when connecting through bottom

Bottom Connections

(possible with raised floor)

Rear

DPN001792 Rev. 2

GDH

or HS

4-13/16"

(122.2mm)

23-5/8"

(600mm)

2-1/8" (54mm)

LVB

LVB 2

HVT

HVB

8-7/8"

(226mm)

1-1/8" (28mm)

7-13/16"

(199mm)

3-1/16"

(77mm)

(127mm)

1-3/4"

(44mm)

5-1/8"

(130mm)

9-3/4"

(248mm)

12-3/4"

(325mm)

2-15/16"

(74mm)

2-3/16" (56mm)

2-11/16"

(69mm)

9-5/16"

(237mm)

3-1/16"

(77mm)

2-11/16"

(69mm)

2-11/16"

(69mm)

2-15/16"

(74mm)

3-1/4"

(83mm)

3-13/16"

(97mm)

5-3/8"

(136mm)

1-3/8"

(35mm)

2-1/8" (54.7mm)

1-3/4"

(45mm)

1-3/4"

(45mm)

1-1/2"

(38mm)

46-1/4"

(1175mm)

3-1/4" (83mm)

17-5/16"

(440mm)

9-1/2"

(242mm)

Refrigerant Connections

Liebert® CRV

™

Refrigerant Connections

Table 11 Unit connections, air-cooled models

Unit Connections CR20A (50Hz) CR35A (50Hz) CR20A (60Hz) CR35A (60Hz)

GD Gravity Coil Pan Drain 20mm I.D. 1" MPT

GDH Gravity Humidifier Drain 22mm I.D. N/A

CP Condensate Pump 1/2" GAS F 1/2" FPT

HS Humidifier Supply

HVT

HVB

LVT

LVB

Source: DPN001792, Rev.2

Refrigerant Liquid

Line Inlet

Refrigerant Gas

Line Outlet

High Voltage

Top Connection

High Voltage Bottom

Entrance (feed through

the base of the unit)

Low Voltage

Top Connection

Low Voltage Bottom

Entrance (feed through

the base of the unit)

Low Voltage Bottom

Entrance (feed through

the base of the unit)

12mm O.D. Cu Sweat 16mm O.D. Cu Sweat 1/2" O.D. Cu Sweat 5/8" O.D. Cu Sweat

16mm O.D. Cu Sweat 22mm O.D. Cu Sweat 5/8" O.D. Cu Sweat 7/8" O.D. Cu Sweat

1/2" GAS F (top connection)

3/4" GAS F (bottom connection)

Combination Knockout

Hole Diameter 1-3/8" (35mm)

1-3/4" (44.5mm) and 2-1/2" (63.5mm)

1/4" Compression Fitting (bottom connection)

1/2" FPT (top connection)

Combination Knockout Hole

Diameter 1-3/8" (35mm)

1-3/4" (44.5mm) and 2-1/2" (63.5mm)

Hole Diameter 2-1/2" (63.5mm) Knockout Hole Diameter 2-1/2" (63.5mm)

Hole Diameter 7/8" (22mm) 2 places

Hole Diameter 1-7/64" (28mm) 2 places

—

Knockout Hole Diameter 7/8" (22mm)

2 places

Knockout Hole Diameter 1-3/32" (27.8mm)

2 places

Knockout Hole Diameter 1-3/4" (44.5mm)

1 place

25 Liebert® CRV

™

Refrigerant Connections

6.3 Vacuum and Refrigerant Charge

NOTICE

Risk of improper refrigerant charge. Can cause equipment damage and reduced efficiency. Check the refrigerant type to be used on the data plate of the air conditioner and on the

refrigerating compressor.

Table 12 R-410A refrigerant and oil charge for air-cooled models

Base Oil Charge

Base

Refrigerant

Charge

Model

CR020RA 7 (3.2) 60 (1.68) 56 (1.57) 38 (17.1) 1.6 (.045)

CR035RA 10 (4.5) 110 (3.08) 106 (2.97) 28 (12.6) 4 (.113)

1. The recommended oil is EMKARATE RL 32-3MA.

lb (kg)

Initial Oil

Charge

oz (kg)

Max. Topping

oz (kg)

Max. System

Refrigerant Charge

before Oil Addition,

lb (kg)

Weight of Oil to Add for

Every 10lb (4.5kg) of

Refrigerant over Max

System Charge,

oz (kg)

Table 13 Refrigerant charge

External Pipe Diameter

in (mm)

1/2" x 0.049 (12 x 1) - 0.05 (0.08) 0.05 (0.07) 0.04 (0.07)

9/16" x 0.049 (14 x 1) 0.0084 (0.0124) 0.07 (0.11) 0.07 (0.11) 0.06 (0.10)

5/8" x 0.049 (16 x 1) 0.0114 (0.0169) 0.10 (0.16) 0.10 (0.14) 0.09 (0.13)

3/4" x 0.049 (18 x 1) 0.0149 (0.0221) 0.14 (0.20) 0.13 (0.19) 0.11 (0.17)

7/8" x 0.065 (22 x 1.25) 0.0232 (0.0346) — — —

1-1/8" x 0.065 (28 x 1.5) 0.0392 (0.0584) — — —

(+) Liquid pressure and density varies according to condensing temperature (see refrigerant tables).

1. For distance D see Figure 16 Pipeline air conditioner - condenser

Gas R-410A,

lb/feet (kg/m)

Liquid (+), at Different Condensing

Temperatures - R-410A, lb/ft (kg/m)

95°F (35°C) 115°F (46°C) 135°F (57°C)

Table 14 Air-cooled condenser refrigerant charge

Liebert Lee-Temp

VFD

Model

28 K 7 (3.2) 41 (18.6)

60 K 16 (7.3) 75 (34.0)

90 K 25 (11.3) 109 (49.4)

Topping up is requested for short pipeline, too, due to the extra-charge of refrigerant. The air conditioner is supplied pressurized with helium at 1 bar.

lb (kg) lb (kg)

(inc. receiver)

™

Table 15 Refrigerant and oil charge for water-cooled models

R-410A

Refrigerant Charge

Model

CR020RW 13.0 (5.9) 60 (1.68)

CR035RW 17.0 (7.7) 110 (3.08)

The air conditioner is supplied complete with refrigerant and oil.

1. The recommended oil is EMKARATE RL 32-3MA.

Liebert® CRV

™

lb (kg) oz (kg)

Initial Oil

Charge

Figure 18 Connections for vacuum creation and refrigerant charge

Suction and Supply Line Connections

Liquid Line Connection

Thermostatic Valve Connection

6.3.1 Evacuation Air-Cooled Models

Variable Fan Speed Control Leak Check and Evacuation Procedure

Refrigerant Connections

Proper leak check and evacuation can be accomplished only with all system solenoid valves open and check valves accounted for.

NOTE

The system include a factory-installed check valve and an additional downstream Schrader valve with core in the compressor discharge line. Proper evacuation of the condenser side of the compressor can be accomplished only using the downstream Schrader valve. See piping schematic.

1. If unit power is available, open the unit liquid line solenoid valves using the evacuation function for System #1 in the diagnostic section of the Liebert iCOM power is not available, a field-supplied 24VAC / 75VA power source must be directly connected to the unit solenoid valve.

2. Connect refrigerant gauges to the suction rotalock valves and discharge line Schrader valves.

3. Open the service valves and place a 150 PSIG (1034 kPa) of dry nitrogen with a tracer of refrigerant. Check system for leaks with a suitable leak detector.

4. After completion of leak testing, release the test pressure (per local code) and pull an initial deep vacuum on the system with a suitable pump.

5. After four hours, check the pressure readings and, if they have not changed, break vacuum with dry nitrogen. Pull a second and third vacuum to 250 microns or less. Recheck the pressure after two hours. After completing this step, proceed to Variable Fan Speed Charging on page 28.

control (see Figure 68). If unit

27 Liebert® CRV

™

Refrigerant Connections

Variable Fan Speed Charging

1. Check unit nameplate for refrigerant type to be used. Unit control configurations differ depending on refrigerant type.

2. Charging the system with refrigerant requires the unit to be in an operational state..

3. Calculate the amount of charge for the system. Refer to the unit, condenser and refrigerant line charge data in Tables 12, 13 and 14.

4. Weigh in as much of the system charge as possible before starting the unit.

NOTICE

Risk of improper refrigerant charging. Can cause equipment damage. Refrigerant R-410A is a blend of two components and must be introduced and charged from

the cylinder only as a liquid. When adding liquid refrigerant to an operating system, it may be necessary to add the

refrigerant through the compressor suction service valve. Care must be exercised to avoid damage to the compressor. Emerson recommends connecting a sight glass between the charging hose and the compressor suction service valve. This will permit adjustment of the cylinder hand valve so that liquid can leave the cylinder while allowing vapor to enter the compressor.

5. Turn on unit disconnect switch. Operate the unit for 30 minutes using the charging function in the diagnostic section of the Liebert iCOM operates the compressor at full capacity and energizes the blower motor and the liquid line solenoid valve. The reheat and humidifier are disabled. A minimum 20psig (138kPa) must be established and maintained for the compressor to operate. The charging function can be reset as many times as required to complete unit charging.

6. Charge the unit until the liquid line sight glass becomes clear, then add one additional pound (2.2kg) of refrigerant.

control (see Figure 68). The charging function

NOTE

A digital scroll compressor will have a clear sight glass only when operating at 100% capacity. When operating below 100%, the sight glass may show bubbles with each 15-second unloading cycle.

7. As head pressure builds, the variable fan speed controlled condenser fan begins rotating. The fan will run at full speed when sufficient head pressure is developed—fan starts to rotate at 310psig (2137kPa) and is full speed at 400psig (2758kPa).

Liebert® CRV

™

7.0 WATER CONNECTIONS

Condensate Pump Drain

Humidifier Water Supply

Table 16 Water connection options

Liebert CRV Option Top Connections Bottom Connections

Condensate Pump and Humidifier

Condensate Pump and No Humidifier

No Condensate Pump and No Humidifier

Table 17 Volume of CRV internal water circuits

Model Volume

CR020RW 4.8 liters, 1.27 gallons

CR035RW 5.7 liters, 1.51 gallons

CR040RC 17.6 liters, 4.65 gallons

7.1 Water Connections—Supply Humidifier and Drain Water, All Models

Units with a condensate pump and humidifier are preset to be connected from the top. If floor connections are used, the water lines can be intercepted at the following points:

Available Available

Not Available Available

Water Connections

Figure 19 Water connection points, bottom entry

• Condensate drain without pump:

• Use tubing rated to carry water up to 212°F (100°C) copper, PVC or flexible polythene tubing.

• Allow a 2% gradient toward the drain.

• Drain is trapped internally. Do not trap the drain external to the equipment.

• Fill the drain trap with water.

• Humidifier (optional): See Appendix A - Humidifier.

29 Liebert® CRV

™

7.2 Glycol Mixture

Add ethylene glycol or propylene glycol to the circuit in the percentages shown in Table 18.

Table 18 Glycol mixtures

Water Connections

Glycol Percentage *

by Volume

0% 32 (0) 32 (0)

10% 25.3 (-3.7) 28.9 (-1.7)

20% 16 (-8.9) 18.7 (-7.4)

30% 3.7 (-15.7) 8.4 (-13.1)

40% -12.6 (-24.8) -6.7 (-21.5)

* Freezing temperatures may vary slightly among commercially available glycol products; refer to manufacturer’s specifications.

Ethylene Glycol -

Freezing Temperature, °F (°C)

7.3 Water Connections: Water/Glycol-Cooled Models

The unit must receive cooling water as follows:

• From an external cooling water source, in open circuit.

• Using a drycooler, in closed circuit.

1. Connect the piping as shown in Appendix D - Refrigeration and Hydraulic Circuits.

2. Use hoses connected with three-piece joints to the condenser water inlet and outlet couplings.

3. Install a 16-20 mesh strainer on the water/glycol supply to the Liebert CRV. The strainer is needed to prevent particles in the water from entering the unit’s heat exchanger.

4. Place shutoff ball valves at the conditioner inlet and outlet to allow easy maintenance.

5. Install a water drain system at the lowest point in the circuit.

6. Fully drain the piping before connecting it to the air conditioner.

Propylene Glycol -

7.3.1 Notes for Open-Circuit Applications

• Use the unit with mains or well water. Do not use water from an evaporative cooling tower unless the water hardness is controlled.

• The water pressure must be 29-145psi (2-10 bar). If water pressure is outside this range, contact Emerson for technical support.

• The required water flow at different temperatures is available from Emerson.

• If water temperature is very low, insulate both pipes.

7.3.2 Notes for Closed-Circuit Applications

The installation in Figure 3 is illustrative only; for individual installations follow the project diagram.

• Install a pump system calculated on the basis of the flow and total head of the system (see site plan data) and controlled by the compressor running (see label on the Liebert CRV).

• Insulate both pipes.

• Very important: Add water and ethylene glycol to the circuit when the ambient temperature is below 32°F (0°C); refer to the Liebert CRV technical data manual, SL-11978). Do not exceed the nominal operating pressure of the circuit components.

• Bleed air out of the circuit.

Liebert® CRV

™

7.4 Chilled Water Connections: Chilled Water Units

Top Connections

Bottom Rear Connections

Tubing Support

Water Drain Tap

Ball Valves

Thermostat

Pressure Gauge

Insulation

Liebert CRV

Figure 20 Chilled water connections

Refer to Figure 21 when performing these installation steps:

• Use copper tubing or steel pipe.

• Place the tubing on supporting saddles.

• Insulate both tubes

• Install shutoff ball valves on the inlet and outlet pipes to ease maintenance.

• Install optional thermostats and pressure gauges on the inlet and outlet pipes.

• Install a water drain tap at the lowest point in the circuit.

• Fill the circuit with water or glycol.

Figure 21 Chilled water circuit

Water Connections

31 Liebert® CRV

™

Figure 22 Air bleeding valve position CW

REAR VIEW

Water Connections

Liebert® CRV

™

Figure 23 Connections—water/glycol models

HVT

LVT

GDH

or HS

Piping and electrical connections available at the top and bottom of unit.

* Install a 35 mesh strainer, in an easily accessible location, on the Water/Glycol Supply to prevent particles from entering the heat exchanger. Strainer bypass valves are recommended to allow the strainer to be cleaned while maintaining flow to the cooling unit.

Bottom Connections

(possible with raised floor)

DPN001793 Rev. 2

Top Connections

Rear

2-3/16" (56mm)

4-13/16"

(122.2mm)

2-3/16" (56mm)

23-5/8"

(600mm)

2-1/8"

(54mm)

(127mm)

or CP

LVB

HVB

7-13/16"

(199mm)

8-7/8"

(226mm)

1-1/8"

(28mm)

4-1/8" (105mm)

6-1/8"

(155mm)

7-13/16"

(199mm)

3-1/16"

(77mm)

5-1/8"

(130mm)

5-3/8"

(136mm)

2-1/8" (54.7mm)

1-3/4"

(44mm)

12-3/4"

(325mm)

2-15/16"

(74mm)

2-11/16"

(69mm)

2-11/16"

(69mm)

2-11/16" (69mm)

9-5/16"

(237mm)

9-3/4"

(248mm)

3-7/8"

(98mm)

1-1/2"

(38.1mm)

3-1/4" (83mm)

3-13/16"

(97mm)

1-3/8"

(35mm)

1-3/4"

(45mm)

1-3/4" (45mm)

46-1/4"

(1175mm)

3-1/4"

(83mm)

17-5/16"

(440mm)

9-1/2"

(242mm)

Water Connections

33 Liebert® CRV

™

Table 19 Unit connections, water/glycol-cooled models

Unit Connections CR20W (50Hz) CR35W (50Hz) CR20W (60Hz) CR35W (60Hz)

CS Water/Glycol Coolant Supply 32mm GAS F 1-1/4" FPT

CR Water/Glycol Coolant Return 32mm GAS F 1-1/4" FPT

GD Gravity Coil Pan Drain 20mm I.D. 1" MPT

GDH Gravity Humidifier Drain 22mm I.D. N/A

HS Humidifier Supply

1/2" GAS F (top connection)

3/4" GAS F (bottom connection)

CP Condensate Pump 1/2" GAS F 1/2" FPT

Combination Knockout Hole

HVT High Voltage Top Connection

Diameter 1-3/8" (35mm)

1-3/4" (44.5mm) and 2-1/2" (63.5mm)

High Voltage Bottom Entrance

HVB

(feed through the base of the unit)

LVT Low Voltage Top Connection

Low Voltage Bottom Entrance

LVB

(feed through the base of the unit)

Low Voltage Bottom Entrance

LVB2

(feed through the base of the unit)

Source: DPN001793, Rev. 2

Hole Diameter 2-1/2" (63.5mm) Knockout Hole Diameter 2-1/2" (63.5mm)

Hole Diameter

7/8" (22mm) 2 places

Hole Diameter 1-7/64" (28mm)

2 places

—

1/2" FPT (top connection)

1/4" Compression Fitting

(bottom connection)

Combination Knockout Hole

Diameter 1-3/8" (35mm)

1-3/4" (44.5mm) and 2-1/2" (63.5mm)

Knockout Hole Diameter

7/8" (22mm) 2 places

Knockout Hole Diameter

1-3/32" (27.8mm) 2 places

Knockout Hole Diameter

1-3/4" (44.5mm) 1 place

Water Connections

Liebert® CRV

™

Figure 24 Connections—chilled water models

Piping and electrical connections available at the top and bottom of the unit.

TOP CONNECTIONS

BOTTOM CONNECTIONS (possible with raised floor)

REAR

LVT

HVT

LVB

LVB2

GDH or HS

CWR

CWS

GD or CP

46-1/4"

(1175)

(127)

3-1/4" (83)

17-5/16"

(440)

3-1/16" (77)

9-5/16

(237)

1-3/4"

(45)

9-1/2"

(242)

2-11/16"

(69)

1-1/8"

(28)

2-3/16" (56)

3-13/16"

(97)

3-1/16")

(77)

3-7/8"

(98)

HVB

9-3/4"

(248)

8-7/8"

(226)

(325)

12-3/4"

2-11/16"

(69)

2-11/16"

(69)

2-3/16"(56)

4-1/8"

(105)

6-1/8"

(155)

2-1/8" (54.71)

2-1/8" (54)

5-3/8" (136.01)

23-5/8" (600)

3-1/4" (83)

1-3/4" (45.2)

1-1/2" (38.1)

4-13/16" (122.16)

7-13/16" (199)

1-3/8"

(35)

1-3/4"

(44)

5-1/8"

(130)

2-15/16"

(74)

DPN001794 Rev. 2

Water Connections

35 Liebert® CRV

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Water Connections

APPLIANCE

TSHTC

Filling

Water

(optional)

HTC

Shutoff Valve

Pump

Check Valve

Gauge

Thermostat Variex (50Hz Opt.)

Safety Valve

Expansion Tank

Air Separator

Charge Group (Filter, Reducer, Check Valve)

Filling Meter

Drain (at Lowest Point)

(*)

Standby Pump

Pressure-Operated Bypass

See hydraulic drawings in the Appendix D

Disconnect After Charge

Table 20 Unit connections, chilled water models

Unit Connections CR040C (50 Hz) CR040C (60 Hz)

CWS Chilled Water Supply 32mm GAS F 1-1/4" FPT

CWR Chilled Water Return 32mm GAS F 1-1/4" FPT

GD Gravity Coil Pan Drain 20mm I.D. 1" MPT

GDH Gravity Humidifier Drain 22mm I.D. N/A

HS Humidifier Supply

1/2" GAS F (top connection)

3/4" GAS F (bottom connection)

CP Condensate Pump 1/2" GAS F 1/2" FPT

Combination Knockout Hole

HVT High Voltage Top Connection

Diameter 1-3/8" (35mm)

1-3/4" (44.5mm) and 2-1/2" (63.5mm)

HVB

High Voltage Bottom Entrance

(feed through the base of the unit)

LVT Low Voltage Top Connection

LVB

LVB2

Source: DPN001794, Rev. 2

Low Voltage Bottom Entrance

(feed through the base of the unit)

Low Voltage Bottom Entrance

(feed through the base of the unit)

Hole Diameter

2-1/2" (63.5mm)

Hole Diameter

7/8" (22mm) 2 places

Hole Diameter

1-7/64" (28mm) 2 places

—

1/2" FPT (top connection)

1/4" Compression Fitting

(bottom connection)

Combination Knockout Hole

Diameter 1-3/8" (35mm)

1-3/4" (44.5mm) and 2-1/2" (63.5mm)

Knockout Hole Diameter

2-1/2" (63.5mm)

Knockout Hole Diameter

7/8" (22mm) 4 Places

Knockout Hole Diameter

1-3/32" (27.8mm) 2 Places

Combination Knockout Hole

Diameter 1-3/4" (44.5mm) 1 Place

Figure 25 Recommended drycooler Installation

Liebert® CRV

™

8.0 ELECTRICAL CONNECTIONS

Remove these bolts to access low voltage electrical panel

Remove these bolts to access high voltage electrical panel

Remove these bolts to open lower front baffle panel

8.1 Electrical connections

WARNING

Arc flash and electric shock hazard. Can cause injury and death. Disconnect local and remote power supplies and wear appropriate personal protective

equipment per NFPA 70E before working within. 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 iCOM

mode. Some internal components require and receive power even during the Unit Off mode of the

Liebert iCOM control. The factory-supplied optional disconnect switch is inside the unit. The line side of this switch

contains live hazardous voltage potential. Install and open a remote disconnect switch and verify with a voltmeter that live hazardous

voltage potential is not present inside the unit cabinet before working within. Refer to the unit electrical schematic.

Follow all national and local codes.

microprocessor does not isolate power from the unit, even in the Unit Off

Electrical Connections

WARNING

Risk of electric shock. Can cause injury or death.

This unit has a high leakage current potential. Proper earth ground connection per national and local codes is required before connection to the electric power supply.

Figure 26 Remove electrical panel and lower front panel

37 Liebert® CRV

™

Figure 27 Power and control cable entry points and routing

High Voltage Top Entry Port

Low Voltage Channel opening provides access to the Liebert IntelliSlot

card housing

Low voltage cables are routed through a channel in the side panel to connect the bottom of the unit to the electrical panel

High voltage bottom entry port

Low voltage bottom entry port

High Voltage Top Entry Port

Low Voltage Top Entry Port

Electrical Connections

8.1.1 Power Supply Cable Connections

Before proceeding with the electrical connections, ensure that:

• all electrical components are undamaged

• all terminal screws are tight

• the supply voltage and frequency are as indicated on the unit

• Connect the cable to the line inlet terminal board.

• Use the appropriate cable size for the current draw, supply voltage and installation type.

• Protect the supply using a backup fuse or circuit breaker.

• Do not fit the supply cable in the raceways inside the machine electric board.

• Use only multipolar cables with sheath (CEI20-22).

Wiring Connections

• Remote On/Off connections must be provided by the installer.

• The General Alarm terminals allow remote alarm signalling.

In case of short circuit, check the affected switch for sticking and replace it if necessary.

See electrical data in Appendix B - Electrical Data.

Liebert® CRV

™

8.2 Protective Features of the Electrically Commutated Fans

Temperature sensor protection

The EC fans are protected against:

• Overtemperature of electronics

• Overtemperature of motor

• Locked rotor protection

• Short circuit at the motor output

When any of these failures occurs, the motor stops, electronically, with no potential for separation, and the status relay is released.

The unit does not restart automatic automatically. To reset the alarm, the power supply must be switched Off for 20 minutes once motor is at standstill.

• Input power undervoltage detection: If the utility power falls below 3ph/290VAC (typical value) for 5 seconds or longer, the motor is

switched Off, electronically, with no potential for separation, and the status relay is released. When the utility voltage returns to a correct value, the motor restarts automatically.

• Phase failure recognition: If one phase fails for 5 seconds or longer, the motor is switched Off, electronically, with no poten-

tial for separation, and the status relay is released. When all three phases return to correct values, the motor restarts automatically in 10 to 40 sec-

onds.

Electrical Connections

The power supply for an external speed-setting potentiometer is protected against short-circuiting.

The motor is overload-protected via motor current limitation.

8.3 Protective Features of Electrical Heaters

Figure 28 Electrical heating with temperature sensor protection

When the temperature sensor detects overtemperature of electrical heating, the thermal protection turns Off the current. To reset the thermal protection, push the button on the front of the unit (see Figure 28).

39 Liebert® CRV

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9.0 STARTUP

9.1 Initial Startup

WARNING

Risk of hair, clothing and jewelry entanglement with high speed rotating fan blades. Can cause equipment damage, serious injury or death.

Keep hair, jewelry and loose clothing secured and away from rotating fan blades during unit operation.

WARNING

Risk of contact with rotating fan blades. Can cause injury or death. The Liebert CRV’s fan blades will continue spinning after the unit is shut Off. Wait until the

fan blades have stopped before working on the unit.

To start the Liebert CRV:

1. Open all valves in the refrigeration circuit according to the instruction label attached to the valve.

2. W Models Only: Open all valves in the water circuit according to the instruction label attached to the valve.

3. Ensure that the refrigerant charge is correct (see 6.0 Refrigerant Connections).

4. Using a leak detector, verify that there are no refrigerant leaks. If any leaks are detected, repair them and recharge as described in 6.0 Refrigerant Connections.

5. At least 4 hours before startup, close the main switch and the compressor switch on the electrical panel.

Startup

NOTE

The default setting for the Liebert iCOM mode allows users to turn on the unit simply by rotating the main switch on the electrical panel. The yellow LED on the Liebert iCOM will light after the unit is turned on because electrical power is present.

If the LED does not light:

• check the electrical panel power supply

• check the protection devices (e.g., thermal switches)

• check the fuses.

6. Verify that the crankcase heater is working.

7. Check to ensure that there are no water leaks.

8. If an external condenser or drycooler is installed, start it by supplying power to it.

9. Close all MCBs on the electrical panel.

10. Check the supply voltage on all phases.

11. Check the supply voltage on all phases for the external condenser or drycooler, if fitted.

12. Start the unit by pressing the On/Off switch.

13. Check the amp draw of all components (see 8.0 Electrical Connections).

14. Check the amp draw of the external condenser/drycooler, if fitted.

15. If the compressor makes a loud, unusual noise, invert the electrical connections of the phases supplying the corresponding digital scroll compressor, which accepts only one direction of rotation.

16. Ensure that the fans rotate in the correct direction (see arrow on fan).

17. Ensure that all control system settings are correct and that there are no alarms (see Figure 48).

18. W Models Only: Verify the water flow is adequate.

19. W Models Only: For closed circuit units, ensure that the water pump starts when the compressor starts.

control is for stand-alone operation. The stand-alone

Liebert® CRV

™

Checks to Perform after Startup

Liquid Receiver Valve

Filter Dryer Inlet Schrader Val ve

Filter Dryer

Sight Glass

Solenoid Valve

Thermostatic expansion valve

Once the system is operating under load, check the various components, as follows:

1. Verify that the fans are operating properly.

2. Ensure that the temperature and relative humidity are being controlled, and that the humidifier (optional) and heating steps (optional) operate when required.

3. Ensure that the compressor operates when required.

4. Ensure that the fan operation controller on the external condenser/drycooler (if fitted) is calibrated correctly, and that it controls the fan operation.

5. Record all of the following on the warranty inspection form: a. All component voltages and current draws b. All air / water temperatures indoor and outdoor c. All refrigerant and water / glycol pressures, d. All levels of refrigerant and oil in sight glasses e. Record refrigerant pressure switch settings and operating pressures f. Record superheat and sub-cooling.

9.2 Automatic Restart

If desired, the unit will automatically restart on the return of power after a supply interruption (see Figure 90).

Startup

To avoid an automatic cold restart of the compressor if a power interruption of several hours is expected, stop the unit before the blackout. After power returns, allow the compressor to preheat before restarting the unit.

Figure 29 Refrigerant line components

41 Liebert® CRV

™

9.3 Chilled Water Valve: Chilled Water Models

0 1

Position indicator on 0 = CLOSED valve (3-way valve: bypass open)

Position indicator on 1 = OPEN valve (3-way valve: by-pass closed)

The 3-way valve controls the chilled water flow and operates as follows (refer to Figure 4):

• When the valve is fully open (i.e., maximum chilled water flow), the actuator slot is set to “1.”

• When the valve is closed (i.e., no chilled water flow), the actuator slot is set to “0.”

The valve running time is set to the value specified in the control manual.

For more details, see the technical bulletin for chilled water valves and related actuators. Technical bulletins are enclosed with documentation onboard the unit.

NOTE

1. In the unlikely event of control system failure, the valve can be manually controlled with the rotary knob. It can be used to drive the actuator into any position between 0 and 1.

2. When the actuator stem is completely down, the valve is open and chilled water coil is supplied.

Figure 30 Position of the chilled water valve actuator (for 2- or 3-way valve)

Startup

9.4 Adjust Baffles to Direct Air Properly

WARNING

Risk of electric shock. Can cause injury or death. Disconnect all local and remote electric power supplies before working within. Ensure that the Liebert CRV is shut down and power has been disconnected before beginning

any work on the unit.

The Liebert CRV has been equipped with an adjustable, modular supply air baffle system. The baffles should be adjusted prior to start-up to direct air towards the racks the cooling unit is intended to condition. Ideally, these should be the same racks the cooling unit is pulling hot air from. The baffles can be readjusted at any time as cooling needs change.

The Liebert CRV is shipped with the baffles in an alternating pattern to direct cold air left and right. This configuration should be used when the cooling unit is located between racks. If a Liebert CRV is installed at the end of a row, all the baffles should be adjusted to blow air down the cold-aisle, toward the racks. The baffle segments at the top of the panel will direct more air than the segments at the

Liebert® CRV

bottom. The supply air will travel the furthest when all baffle segments are pointed in the same direction, left or right.

™

To adjust the baffles:

1. Open Liebert

CRV Display Door

Inside view, showing baffle removal for changing airflow direction

2. Remove two bolts

3. Tilt and lift

baffle panel

For proper operation, the baffles must be installed so the discharge air points upward

DPN001863 Pg. 1, Rev. 2

1. Open the door containing the Liebert iCOM

display.

2. Remove the two screws holding a baffle panel segment in place.

3. Slide out the baffle segment.

4. There is one screw on each side of the baffle, as shown in Figure 31. Remove the screws and rotate the baffle segment around its horizontal axis to change the airflow direction.

5. Reinsert the baffle segment and reinstall the screws.

Figure 31 Adjust the baffles to ensure correct airflow direction

Startup

A blocker plate inside the display door should also be adjusted to direct air towards the racks the Liebert CRV is intended to condition. The blocker plate can be installed on the left or right side of the display door, or it can be removed to discharge air left and right.

43 Liebert® CRV

™

Figure 32 Adjust air-blocking plate

Perforated Supply Air Opening

Air Blocker Installed Over Perforation

Attachment Screws

FRONT VIEW

DPN001863 Pg. 2, Rev. 2

INSIDE DISPLAY DOOR

Startup

9.5 Remote Rack Sensor Wiring

Instructions to adjust the air blocker:

1. Remove the three screws that attach the blocker plate to the display door.

2. Reattach the blocker plate to the other side of the display door or remove entirely.

The Liebert CRV is capable of supporting up to ten (10) 2T remote rack temperature sensor housings. It is recommended that one (1) 2T housing be attached to each rack the Liebert CRV is intended to cool. The sensors provide feedback directly to the cooling unit to improve efficiency and performance. Rack sensors help combat cooling problems related to recirculation air, uneven rack loading and air distribution. The 2T rack sensors are intended for cold aisle use only.

While installing the rack sensors is optional, Emerson recommends that they be installed. Installations with multiple Liebert CRV cooling units should be connected in a Unit-to-Unit (U2U) Ethernet network to leverage all of the Liebert iCOM

iCOM

U2U Network.

control benefits, see 11.3 Wiring a Liebert

A sensor network can be extended at any time by connecting additional 2T sensors to the last 2T sensor on the network. Sensors connect in a daisy chain fashion back to the cooling unit; individual wires

from each sensor to the cooling unit are avoided. There are two steps to setting up a remote rack sensor:

• The DIP switches of the remote rack sensor must be configured to have a unique ID

• The Liebert iCOM control must be set to use the remote rack sensor as either a controlling sensor or as a reference sensor.

Liebert® CRV

™

Figure 33 Figure 2T rack sensor

Each temperature probe wire is 1830mm (6 feet) long

Temperature sensing probe

2T Sensor

Back

Front View

(3-3/8")

(1-5/8")

4.5 (3/16")

67 (2-5/8")

Max. depth

41 (1-5/8")

(

)

Switch Up = ON

Switch Down = OFF

9.5.1 DIP Switch Settings

Three 2T sensor housings are included with each Liebert CRV. The DIP switches in these sensors have been preset at the factory. It is recommended that you confirm that the DIP switches have been set correctly using the below table. Any additional 2T sensor housings will need their dip switches set per the below table. If the dip switches are not set correctly, the control will not operate properly.

Figure 34 DIP switches in 2T sensors

Startup

Table 21 DIP switch settings

DIP Switch Position

2T Rack Sensor

Included with Liebert CRV

Sensor # 1 Off Off ON Off

Sensor # 2 ON Off ON Off —

ON off off off

Sensor # 3 Off ON ON Off Yes

Optional 2T Rack Sensors

Sensor # 4 ON ON ON Off

Sensor # 5 Off Off Off ON —

Sensor # 6 ON Off Off ON —

Sensor # 7 Off ON Off ON —

ON off off off

Sensor # 8 On ON Off ON —

Sensor # 9 Off Off ON ON —

Sensor # 10 ON Off ON ON —

Factory-Set

to Terminated12345678

45 Liebert® CRV

—

™

9.5.2 Set 2T Rack Sensor Identities—DIP Switch settings

Non-conductive DIP switch tool

2T sensor housing DIP switch hole

2T sensor housing case opened

CRV Cooling Unit Sensor #5 Sensor #2 Sensor #4 Sensor #1 Terminated

Sensor #3

1. Confirm the DIP switches are set correctly for 2T sensors numbered 1, 2 and 3.

2. If additional sensors are to be connected to a cooling unit: a. Apply numbered stickers to the sensor housings, corresponding to sensor chain position. b. Based on the sensor number, use the included DIP switch tool to set the DIP switches

according to the table above. If you are having difficulty setting switches through the opening in the housing or if the hole is not present, you may open the case by removing the three Phillips-head screws. Reassemble housing once complete.

Figure 35 Setting 2T Sensor DIP Switches

Startup

Note: Use included DIP switch tool (or similar tool). DO NOT insert any metal object into the sensor case.

9.5.3 Terminating the Last 2T Sensor on a Network

The last 2T sensor on the network, which can be identified by only having one CAN cable plugged into it, needs to be “Terminated”. All other 2T sensors on the network need to remain “Un-terminated”. Sensor #3 is setup as “Terminated” when it leaves the factory. As long as Sensor #3 is the last sensor on the network, none of the other termination jumpers in the other sensors need to be adjusted.

Note: The sensors do not need to be connected in numerical order.

For example, if five sensors are purchased, they can be connected in the following pattern:

Note: In the above example, if additional sensors are added at a later time to extend the existing sensor network, Sensor #3 will have to be “Un-terminated”. The additional sensors can then be connected, and the new last sensor on the network will have to be “Terminated”.

• the last sensor in the new network must be terminated.

To terminate a 2T sensor:

1. Open the sensor’s case by removing the three screws that hold it together.

2. Pull the black jumper off the circuit board from Pins 1 and 2 (see Figure 36).

3. Install the jumper on Pins 2 and 3.

4. Reassemble the sensor housing.

Liebert® CRV

™

Figure 36 Termination jumper setting

Unterminated

Terminated

321 321

Termination Jumper in the Terminated Position

Circuit board inside display housing Circuit board inside 2T sensor housing

Rear of Large Graphic Display

Source DPN001983 Rev. 0

Inside of Display Door

CAN CAN

SW/U2U12VDC PWR

Startup

9.5.4 Route the CAN bus wire into the cooling unit

The CAN bus sensors connect to the open CAN port on the back of the unit display panel. The Display comes “Terminated” from the factory and will have to be “Un-terminated’ to allow for additional sensors to be added. See photo above for termination jumper location for front panel display and sensor boards. Note that connecting the CAN bus sensors will require entering the High Voltage electrical compartment of the Liebert CRV. If you are not comfortable with the installation procedure, it is recommended that you hire a certified electrician.

Connect the 10ft CAN wire to the open CAN bus port on the rear of the iCOM graphic display.

Ensure there is enough slack in the wire to allow the door to open and close freely, but not too much slack to bind or pinch when the door is shut. It is recommended that a cable tie is used to secure the wiring.

Connect the other end of the 10ft CAN cable to the nearest 2T rack sensor. Use additional CAN cables to connect the remaining 2T rack sensors to each other. The order in which the 2T sensors are attached does not matter; however, be sure that the last sensor connected is the one set to “terminated”. As a best practice, avoid using excessive lengths of cable between sensors.

47 Liebert® CRV

™

9.5.5 Installing 2T sensors on racks

2T SENSOR CHAIN

Approx. center of rack/in front of IT equipment.

Install temperature sensors on the perforated portion of the rack door using the supplied zip-ties. Ensure that the doors swing freely without binding cables.

305

(12in)

Source DPN001983 rev0

Both temperature sensors attached to a 2T sensor housing are to be installed on 1 rack. The sensor can be attached to the inside or outside of the rack's front door.

• One temperature sensor is to be attached near the top of the rack’s front door by using a cable tie to secure the wire to the perforation (approx. 12" [305mm] from the top). Do not wrap a cable tie around the actual sensor on the end of the wire. This sensor will monitor for hot air wrapping over the top of the rack from the hot aisle.

• The other temperature sensor is to be attached to the rack's front door, centered in front of the heat generating equipment that will be drawing in air.

• If the rack is completely filled with equipment, locate the sensor in the middle of the door, width and height.

• If the rack is partially filled with equipment, locate the sensor in the center of the equipment on the front door.

•Do NOT

• Install a sensor in the hot aisle

• Leave a sensor coiled on top of or inside the rack.

• With the temperature sensors in place, neatly route the wires up the rack door and into the rack using the supplied cable ties. Be sure to leave an appropriate amount of slack in the cable to allow the rack door to open and close without binding or pinching the wires.

• Affix the 2T sensor housing to the rack using the supplied hook-and-loop fastener. It is recommended that the housing be installed in an easily accessible space with the sensor number label visible in case the housing needs accessed at a later time.

• Repeat this process until all sensors have been installed.

Startup

Figure 37 2T rack sensors installed on neighboring racks

Liebert® CRV

™

Located in the Service / Rack Setup Menu of the Liebert iCOM® display, the sensors can be set up to

Rack Setup (page 1 of 3) UNIT 01

S901 PASSWORD (act. Level 0) ???? S902 Remote Sensor Node 01 Control S903 Remote Sensor Node 02 Reference S904 Remote Sensor Node 03 Disable S905 Remote Sensor Node 04 Control S906 Remote Sensor Node 05 Reference S907 Remote Sensor Node 06 Disable S908 Remote Sensor Node 07 Control S909 Remote Sensor Node 08 Reference S910 Remote Sensor Node 09 Disable S911 Remote Sensor Node 10 Control

press: for next/pr ev unit; and to select par ameter press: , t hen to change par ameter

Rack Setup (page 2 of 3)

Liebert CRV = CRV No Sensors = NoS No rack = [blank ] Sensor Note = 01-10

Assign Names :

01-06 07-12 13-18 19-22

02 00 00 00000001 03 04 05 06

DC01 DC03

DD02

DC05 DC07

DD04

CRV

DC09 DC11

00 00 00 00080700 CRV 00 00 00

Cold Aisle

Use the navigation keys to move from rack to rack, Enter to select a rack, and up- or down keys to scroll through options.

UNIT 01

either display or control temperature, give them a rack name and draw a rack layout that can be viewed in the User menu.

9.5.6 Remote Rack Sensor Operation and Rack View Setup

Figure 38 Rack setup screen, page 1 of 3

Once the remote rack sensors have been configured and plugged into the CAN bus network, the control can be configured to use the sensor for either control or reference. If the sensor is set to “Disable,” it will be ignored. The sensor node number corresponds to the DIP switch assignment of the sensor.

Startup

Figure 39 Rack setup screen, page 2 of 3

Once a sensor has been assigned to either control or display its temperature data a virtual position can then be assigned to the sensor. This screen configures the Rack View layout in the User menu. This step is not required for the sensor to operate but does provide a logical position in the row for quickly referencing affected racks near the Liebert CRV. To set up navigate using the arrow and enter keys to highlight the Assign Sensors number range. Once the range is selected then press the enter key to move to the rack location blocks at the bottom of the screen. The Up and Down arrow keys can be used to select the sensor node number. For the Liebert CRV select “CRV.”

49 Liebert® CRV

™

Figure 40 Rack setup screen, page 3 of 3

Rack Setup (page 3 of 3)

Liebert CRV = CRV No Sensors = NoS No rack = [blank] Sensor Note = 01-10

Assign Names:

01-06 07-12 13-18 19-22

02 00 00 00000001 03 04 05 06

DC01 DC03

DD02

DC05 DC07

DD04

CRV

DC09 DC11

00 00 00 00080700 CRV000000

Cold Aisle

Use the navigation keys to move from rack to rack, Enter to select a rack, and up- or down keys to scroll through options.

UNIT 01

Rack Overview (page 1 of 1) UNIT 01

Cold Aisle

RAC1

71.4

EMAL

72.8

BLAD

69.4

RAC4

70.1

DC0 7

74.5

RAC6

71.0

72.4

06KW

69.3

CRV1

70.8

DISC

All temperatures shown in °F

01 02 03 04 05 06

07 08 CRV

Once a sensor has been assigned to either control or display its temperature data, a custom label can be assigned to the sensor. This step is not required for the sensor to operate but does provide a logical name for identification. Navigate using the arrow and enter keys to highlight the Assign Names number range. Once the range is selected then press the Enter key to move to the rack location blocks at the bottom of the screen. The Up and Down arrow keys can be used to select any alpha or numeric value up to four positions.

Startup

Figure 41 Rack overview screen

If the Rack Setup menus are configured in the Service menu to locate and label the remote rack sensors, then the Rack View in the User menu should look similar to the screen above. This screen will show the node number at the top of each block, the label and the actual temperature that each sensor is currently measuring.

Liebert® CRV

™

10.0 LIEBERT ICOM® CONTROL

ESC

The Liebert CRV is equipped with the most advanced Liebert iCOM control system. The large Liebert iCOM display is standard on the Liebert CRV.

Each Liebert CRV contains a return air temperature and humidity sensor, supply air temperature sensor and three remote rack sensors. Up to an additional 7 remote rack sensors can be added to the sensor network. Each rack sensor takes two temperature readings and reports either the average or the maximum temperature of the two sensors.

The 2T rack temperature sensors provide feedback to the cooling unit about the condition of the air entering the server racks. This information allows the Liebert CRV to ensure it is providing just enough cold air to each rack, virtually eliminating hot spots. Overcooling and excessive airflow are avoided, greatly reducing unnecessary energy consumption.

Each Liebert CRV includes three 2T rack temperature sensors to monitor three racks. A total of ten 2T temperature sensors can be connected to each cooling unit to monitor every rack a Liebert CRV is protecting. When multiple cooling units are connected in a Unit-to-Unit iCOM control network, all sensor data is shared to optimize their performance as a system.

2T rack sensors can also be initially installed on empty racks reserved for future growth with the control set to ignore these sensor readings. The extra 2T temperature sensor readings can also be displayed on the local display and reported remotely for monitoring purposes only; not impacting unit operation. This function provides users with a built-in mini-monitoring system.

Table 22 Keyboard icons and functions

Icon

Key Name Function

Liebert iCOM® Control

On/Off Key Controls the operational state of the cooling unit.

Alarm Key Silences an alarm.

Help Key Accesses integrated Help menus.

ESCape Key Returns to the previous display view.

Enter Key Confirms all selections and selects icons or text.

Increase Key (Up Arrow)

Decrease Key (Down Arrow)

Left and Right Arrow Keys

Upper LED

Moves upward in a menu or increases the value of a selected parameter.

Moves downward in a menu or reduces the value of a selected parameter.

Navigates through text and sections of the display.

Blinking Red—Active, unacknowledged alarm exists

Lower LED

Solid Red—Active, acknowledged alarm exists

Amber—Power is available to the unit; unit is NOT operating

Green—Unit is operating with no alarms

51 Liebert® CRV

™

Figure 42 Liebert iCOM® default screen symbols

fan

cooling

maintenance

hot water

electric heat

dehumidification humidification

freecooling

10.1 Navigating Through the Liebert iCOM Menus

Liebert iCOM shows icons and text for monitoring and controlling your Liebert cooling units or network of cooling units. The number of icons and amount of text shown depends on the display size.

10.1.1 Control Interface

Liebert iCOM® Control

When the buttons on the Liebert iCOM control have not been pressed for a short period, the display backlight turns off. Pressing any key will turn the backlight on (wake up the screen) and display the Status menu of the last cooling unit viewed. The Status menu will show the cooling unit’s operational mode(s), return air temperature and humidity readings, temperature and humidity setpoints and any active alarm conditions.

If the cooling unit has a large display and is not on a network, whether it is networked or stand-alone, the Status menu will display only that cooling unit’s information. Any large display that is connected to a network can be used to view any cooling unit on the network or show an average view of the entire system of cooling units.

The Liebert iCOM control has three main menus: User, Service and Advanced.

The User menu contains the most frequently used features, settings and status information. The Service menu contains settings and features used to set up unit communications and for unit maintenance. The Advanced menu contains settings used to set up the unit at the factory.

NOTE

Menu settings may be viewed without a password, but changing settings requires a password. If a password is required, Liebert iCOM shows a prompt to enter the password. The password for the User menu is 1490. The password for Service menu is 5010. For details on entering a password, see Entering a Password on page 53

10.1.2 Accessing Submenus

To access the User, Service or Advanced menu, press the Enter or down arrow key while viewing the Status menu of the unit you wish to access. The User menu will be displayed first. To view the Service or Advanced menus, press the right arrow key.

Liebert® CRV

Accessing Submenus on Large Displays

While viewing the menu you wish to access (User, Service or Advanced), press the enter key to highlight the first icon. Use the arrow keys to navigate through the icons. With the desired icon highlighted, press the enter key to enter that submenu. Once in a Submenu, a list of parameters will be displayed.

The up and down arrow keys may be used to scroll through the parameters page-by-page if the submenu has multiple pages. To scroll item-by-item, press the Enter key and then use the up and down arrow keys. Using the right or left arrow keys on large displays attached to a network will

™

Liebert iCOM® Control

SETPOINTS

to change parameter

to confirm

to select parameter

for next/previous unit then

PASSWORD (Actual Level 0)

Temperature Setpoint Humidity Setpoint Humidity Control Type Supply Sensor Supply Setpoint Backup Temperature Setpoint

????

73°F

50.0%

Relative

Control

50°F 73°F

UNIT 01

U101 U102 U103 U104 U105 U106 U107 U108 U109 U110 U111

change the unit being viewed. Pressing the ESC key will go back a level. Figures 44 and 45 show the Liebert iCOM respectively.

control menus for a stand-alone large display and for a networked large display,

NOTE

Settings are readable without a password, but changing settings requires a password.

10.1.3 Entering a Password

To change the value of a parameter in a menu, you must first enter the password for that menu. Each menu—User, Service and Advanced—has a unique password to prevent unauthorized changes.

The User menu password is 1490; the Service menu password is 5010.

NOTE

Entering the Service menu password permits access to both the User and Service menus; changes can then be made to parameters in either level.

To enter a password:

1. Navigate to the menu that contains the parameter to be changed.

2. Select Password in the submenu by pressing the Enter key

3. Press the Enter key to move your cursor to the right side of the screen to select the question marks.

4. Use the arrow keys to enter the numeral for the password’s first digit (the up arrow key moves from 1 to the next digit).

5. Use the right arrow key to move to the next question mark and repeat Step 4 to enter all digits in the password.

6. After entering the password, press enter.

Figure 43 Entering a password

If the password is correct, the Actual Level shown to the right of Password will change from 0 to 1 or 2. The menu will remain locked if the password was incorrect.

NOTE

Returning to the Status menu will require re-entering a password to make changes.

53 Liebert® CRV

™

Figure 44 Menu tree—Large display, stand-alone

Status Menu – System View

Status Menu

Unit 1 View

User Menu

Unit 1

Password

Setpoints

Spare Part List

Event Log

Graphics

View Network

Set Alarms

Sensor Data Active Alarms Display Setup

Total Run Hours

Sleep Mode

iCOM-DO

Service Contact Info

Service Menu

Unit 1

Password

Setpoints

Unit Diary

Standby Settings/Lead-Lag

Maintenance/Wellness Settings

Diagnostics / Service Mode

Set Alarms

Sensor Calibration/Setup

System/Network Setup

Options Setup

iCOM-DO

Service Contact Info

Advanced Menu

Unit 1

Password

Factory Settings

Compressor Info

Access Passwords

Unit 1 will be displayed in the top left corner of the screen.

Liebert iCOM® Control

Liebert® CRV

™

10.1.4 Viewing Multiple Units with a Networked Large Display

Status Menu – System View

(Networked Large Display Only)

Status Menu

Unit 1 View

Status Menu Unit 2, 3, 4...

User Menu

Unit #

Password

Setpoints

Spare Part List

Event Log

Graphics

View Network

Set Alarms

Sensor Data Active Alarms Display Setup

Total Run Hours

Sleep Mode

iCOM-DO

Service Contact Info

Service Menu

Unit #

Password

Setpoints

Unit Diary

Standby Settings/Lead-Lag

Maintenance/Wellness Settings

Diagnostics / Service Mode

Set Alarms

Sensor Calibration/Setup

System/Network Setup

Options Setup

iCOM-DO

Service Contact Info

Advanced Menu

Unit #

Password

Factory Settings

Compressor Info

Access Passwords

Unit # or System will be displayed in the top left corner of the screen .

When you first wake up the control, press the ESC key to return to the System view Status menu. This view shows an average of all the units on the network and any alarms present. To view a specific unit on the network, press either the enter key or down arrow key. When you do this, you will see the word System in the top left of the screen change to a unit number. Using the left and right arrow keys you can toggle through the various units on the network. To go back to the System view, or back one level from any menu in the control, press the ESC key.

Figure 45 Menu tree—Large display, networked

Liebert iCOM® Control

55 Liebert® CRV

™

Figure 46 User menu icons

EVENT

LOG

°C / °F

% RH

SET

ALARMS

ACTIVE

ALARMS

1234

RACK

VIEW

User Menu password: 1490

°C / °F

% RH

SET

EVENT

LOG

SET

ALARMS

ACTIVE

ALARMS

1 2

SET

1234h

Table 23 User menu icons

Icon Name

Setpoints View and change temperature and humidity setpoints

Liebert iCOM® Control

Description

Spare Part List

Displays the various part numbers of the components/parts in the cooling unit

Event Log Contains last 400 events

Graphics Displays temperature and humidity graphs

View Network Shows status of all connected units

Set Alarms Allows enable, disable and settings for alarms

Sensor Data Shows readings of standard and optional sensors

Liebert® CRV

Active Alarms Allows the user to view all current active alarms

Display Setup Change settings for display: language, time, simple or graphic view

Total Run Hours

™

Records the run time of all components and allows setting of limits on run time

Table 23 User menu icons (continued)

RACK

VIEW

WELLNESS

SET

ALARMS

SERVIC E

+/-

NETWORK

SET UP

RACK

SETU P

°C / °F

% RH

SET

Service Menu password: 5010

°C / °F

% RH

SET

WELLNESS

SERVICE

SET

ALARMS

Icon Name

Rack View Allows viewing data, collected by sensors, about rack status

Liebert iCOM® Control

Description

Service Contact Info

iCOM-DO Change settings for Liebert iCOM

Figure 47 Service menu icons

Table 24 Service menu icons

Icon Name

Setpoints To view and change temperature and humidity setpoints

Contains key contact information for local service, including names and phone numbers

Discrete Output card

Description

Unit Diary

Standby Settings/ Lead-Lag Allows lead/lag setup when multiple units are connected

Maintenance/ Wellness Settings

Diagnostics/ Service Mode

Set Alarms Allows enable, disable and settings for alarms

Shows all entered program changes and maintenance performed on the unit

Allows setting maintenance interval reminder, maintenance message, number of unit starts and stops and time since last maintenance

Allows troubleshooting, manual mode, read analog and digital inputs

57 Liebert® CRV

™

Table 24 Service menu icons (continued)

+ / -

NETWORK

Icon Name

Sensor Calibration/Setup Allows calibration of sensors

System/Network Setup Allows setup and U2U communication for multiple units

Options Setup Allows setup of component operation

Rack Setup Label racks, establish settings for sensors

Liebert iCOM® Control

Description

Service Contact Info

Humidifier Settings Change Humidifier settings

Contains key contact information for local service, including names and phone numbers

Liebert® CRV

™

10.2 Liebert iCOM® Display Readout

SYSTEM

Liebert

CRV

Average

89%

67%

04/2011

System Supply Return Remote Average: 67°F 96°F 71°F Maximum: 72°F 102°F 78°F Minimum: 62°F 87°F 69°F

28.02.2011 15:03 SYSTEM ON

28.02.2011 14:07 (01) UNIT ON

28.02.2011 14:07 (01) POWER ON

press : for next/prev unit; for unit/sys tem v iew press: for menu; ESC for prev screen; ? for help

The Liebert iCOM controller for the Liebert CRV supports multiple main screen layouts. The screens are a graphical representation of the Liebert CRV, selectable to show unit operation with or without rack sensors, unit operation with a rack sensor summary, historical temperature and humidity trending or trending the screens used on other Liebert products. Unlike other Liebert cooling products, the Liebert CRV display will always revert to the Unit Screen instead of the System Screen.

The following screens are user preference. The remote rack sensor screens should be used only when remote rack sensors are connected.

Figure 48 Liebert CRV system screen

Liebert iCOM® Control

The System screen can be accessed by pressing the Up arrow key when the Unit screen is displayed. The System screen shows the fan speed and cooling capacity averages of all connected units. The Supply, Return and Remote Rack sensors of all connected units are also displayed showing the average, maximum and minimum of all connected sensors.

59 Liebert® CRV

™

Figure 49 Liebert iCOM® menu components for Liebert CRV

UNIT 1

Liebert

CRV

Rack Inlet Temp Average : 71°F Maximum: 73°F Minimum: 69°F

28.02.2011 15:03 UNIT ON

28.02.2011 14:07 (01) UNIT ON

28.02.2011 14:07 (01) POWER ON

press: for next/prev unit; for unit/system view press: for menu; ESC for prev screen; ? for help

89%

67%

04/2011

98°F 20%RH

69 51

°F

%RH

SYSTEM

Liebert

CRV

28.02.2011 15:03 UNIT ON

28.02.2011 14:07 (01) UNIT ON

28.02.2011 14:07 (01) POWER ON

press: for next/prev unit; for unit/system vie w press: for me nu; ESC for prev scr een; ? for help

89%

67%

04/2011

°F 71.4 72.8 69.4 70.1 70.8 71.0 74.577.772.4 76.8

RAC1 EMAL BLAD RAC4 DISC R AC6 06KWDC08DC07 DC10

69.3

Front

Supply

°F

SYSTEM

Liebert

CRV

28.02.2011 15:03 UNIT ON

28.02.2011 14:07 (01) UNIT ON

28.02.2011 14:07 (01) POWER ON

press: for next/prev unit; for unit/sy stem view press: for menu; ESC for prev s cre en; ? for help

69.3

Front

Supply

°F

89%

67%

04/11

16d 12d 8d 4d

69°

-5

+10

51%

-10

Av. Rack Temp

Supply Hum.

18:55

Supply Temperature and Humidity

Last Two Events, Warnings or Alarms

Individual Rack Sensor Temperatures The rack graph is empty at 68°F (20°C) and full at 77°F (25°C).

Historical Supply Air Temperature Graph

Historical Supply Air Humidity Graph

Fan Speed

Return Temperature and Humidity

Cooling Capacity

Next recommended maintenance

Summary of Rack Sensor Readings

Humidification

Liebert iCOM® Control

Liebert® CRV

™

10.3 Liebert iCOM® Control Setup

SETPOINTS UNIT 02

U101

U102 U103 U104

PASSWORD (Actual Level 0)

Controlling Sensor Temperature Setpoint Humidity Setpoint

????

Supply

70°F

50%

for next/previous unit then

Supply Sensor

Return Sensor

Remote Sensor

to change parameter

70°

50%

to select parameter

to confirm

The Liebert iCOM on the Liebert CRV leaves the factory with the fan speed and cooling capacity controlled by the supply air sensor. This control mode is extremely robust and will ensure that you are delivering precise cooling to the cold aisle. To unlock the full capability of the Liebert CRV, the remote rack sensors should be installed, which will allow the fan speed and the cooling capacity to be “de-coupled.” This means that the fan speed can now be controlled independently of the cooling capacity. In this advanced configuration, the Liebert CRV can control the discharge temperature of the unit by modulating cooling capacity based on the supply sensor and use the remote rack sensors to ensure that the cool air is being delivered to the inlet of the racks. Using the supply and remote rack sensors in this de-coupled mode is the preferred method for controlling the Liebert CRV in a hot / cold aisle configuration. In addition to this configuration Emerson has provided additional flexibility for other applications shown in Table 25.

Figure 50 Setpoint screen

Liebert iCOM® Control

In Figure 50, the controlling temperature sensor can be set to either Supply, Return or Remote. As the selection is changed from one sensor to another, the setpoint is displayed next to the corresponding sensor on the illustration, giving a visual indication of the sensor placement in relationship to the Liebert CRV.

A password must be entered to change the setting; see 10.1.3 Entering a Password for assistance on entering the password.

Temperature sensor settings are based on user preference. Use the settings below as a guideline.

1. Set the remote temperature setpoint to the desired server inlet temperature

2. Set the humidity setpoint to 45% with a 10 to 20% deadband. This will control the moisture content well inside the AHSRAE standard.

3. Set the supply setpoint 5°F below the setting for the remote rack sensor. This will serve as a starting point.

If 75°F (24°C) server entering air temperature is desired, the supply air must be colder to account for any thermal pickup of the air as it flows to the cold aisle. If this does not achieve the cold aisle temperature Setpoint, then set the supply sensor setpoint lower. Continue to do this until the cold aisle temperature setpoint is achieved.

61 Liebert® CRV

™

The supply temperature Setpoint may require adjusting since it will be dependent on the distance of the CRV to the server racks being cooled. This temperature will also be dependant on rack blanking panels, server population and if containment is being used

Table 25 Controlling sensor settings

Fan Control

Table 25 shows the flexibility of the Liebert CRV and how the different sensor configurations can be used to control the Liebert CRV fan speed and cooling capacity. The table shows the different coupled and decoupled modes available for the Liebert CRV.

10.4 Event Log

The event log displays all events and actions that have been generated by the unit. When multiple units are networked you will see the event log of the whole system. Each event shows the unit that generated the alarm, time and date stamp, a description and the event type.

Cooling Control

S103Cool / S125 Fan Supply Remote Sensor Return

Supply

Remote Sensor

Return

Factory Default

(Coupled)

Recommended

(Decoupled)

N/A N/A

(Coupled)

(Decoupled)

N/A

(Coupled)

Liebert iCOM® Control

10.5 Spare Part List

The spare parts lists contains a detailed description and part number that can be used to order parts for the unit. These part numbers are specific to each model and option installed on the unit.

10.6 Wellness—Next Maintenance Calculation

The next maintenance calculation, as well as the included diagnostics feature, will help keep the cooling unit running at peak performance to ensure minimum component stress and maximum reliability. The diagnostics will help the service engineer evaluate the unit’s operation since the last maintenance.

10.6.1 Calculation of Next Maintenance and Diagnostics

If the unit includes any of the following components, they are included in the calculation:

•Fan(s)

• Compressor 1

• Compressor 2

• Electric Heaters

• Humidifier

For each component, the next maintenance will be calculated from the following parameters:

• Standard service interval (1, 2 or 4 times a year) (to be set)

• Working hours (counted)

• Number of starts (counted)

• Average running time (calculated)

• Optimum number of starts per hour (to be set)

• Maximum number of starts per hour (to be set)

• Maximum bonus to enlarge time to next maintenance (to be set)

• Maximum penalty to reduce time to next maintenance (to be set)

Liebert® CRV

™

Liebert iCOM® Control

Calculating Unit Wellness

Liebert iCOM® keeps tabs on the condition of a cooling unit, determining its wellness and projecting when service will be needed, for the entire unit as well as for individual components. This assists in scheduling maintenance calls and helps pinpoint components likely to require service.

Liebert iCOM displays a graphic for needed maintenance. It begins with the standard maintenance interval—12 months, six months or three months—and adjusts that based on its calculation of components’ wellness.

To calculate wellness, Liebert iCOM keeps a running total of component working hours and the number of times it has been started. Liebert iCOM relates that data to the optimum/maximum starts per hour. Accordingly, Liebert iCOM will increase or decrease the time before the next service call will be needed.

The more frequently a component starts, the sooner it is likely to need maintenance. If, for example, a unit’s fan runs continuously, but it’s compressor starts and stops often, Liebert iCOM records that and calls for maintenance based on the compressor’s wellness factor.

Alarms and warnings, such as clogged filters or high or low pressure, reduce the time till the next maintenance to zero. If the alarm is cleared and reset, Liebert iCOM recalculates wellness. It begins with the pre-alarm maintenance time and factors in the alarm.

Parameters for Next Maintenance Calculation

General Maintenance Settings

• Maintenance Frequency—can be set as one to 12 months or to zero, which disables maintenance calculation

• Max. Bonus—increases the time to next maintenance with the set value, if all components run optimally (number of starts, average running time)

• Max. Penalty value—decreases the time to next maintenance with the set value, if some components run in non-optimum way (number of starts, average running time)

• Last Maintenance—date can be set from service-engineer; informational

• Service-Engineer—name of the service engineer; editable

• Reset—puts all counters of all components, such as (motor, compressors, heaters and humidifier), at zero and starts a new maintenance calculation (reset to be done after maintenance)

Fans / Heaters / Humidifier Settings and Diagnostics

• Number of starts and Working hours are counted separately since the last maintenance. Total working hours can be read in the standard working hours window (customer window).

• Average Working Hours is the calculation, resulting from starts and working hours.

• Starts per Day Optimum is the number of starts considered as optimum.

• Starts per Day Worst is the number of starts considered as hunting (worst case).

• Number of Alarms counts the alarms, happened between two service intervals.

• Actual Bonus is calculated from number of starts and average working time. Can be positive (bonus) or negative (penalty). This value influences the time remaining to the next maintenance.

Compressor 1 / 2 Settings and Diagnostics

• Number of starts and Working hours are individually counted since the last maintenance. Total working hours can be read in the standard working hours window (customer window).

• Average Working Hours is the calculation, resulting from starts and working hours.

• Starts per Day Optimum is the number of starts considered as optimum.

• Starts per Day Worst is the number of starts considered as hunting (worst case).

• Number of HP Alarms counts the high-pressure alarms, happened between 2 service intervals.

• Number of LP Alarms counts the low-pressure alarms, happened between 2 service intervals.

• Number of TH Alarms counts the thermal protection alarms, happened between 2 service intervals.

• Actual Bonus is calculated from number of starts and average working time. Can be positive (bonus) or negative (penalty). This value influences the time remaining to the next maintenance.

63 Liebert® CRV

™

10.7 Liebert CRV Operation—Liebert iCOM® Control

10.7.1 Cooling

The cooling control of the Liebert CRV can be managed from any of the temperature sensors. Emerson recommends using the supply temperature sensor to control the cooling capacity of the Liebert CRV. The supply temperature is an accurate representation of the actual heat rejection the Liebert CRV needs to perform at an optimal level. A chilled water version of the Liebert CRV will modulate the cooling capacity from 0% - 100% and the DX version of the Liebert CRV will modulate the cooling capacity of the unit from 20% -100% compressor capacity.

To avoid short-cycling the compressor during room heat load changes, the Liebert CRV will not deactivate the compressor until the air temperature is below 150% of temperature setpoint when in Remote or Supply Air Control or below 200% of temperature setpoint when operating in Return Air control.

10.7.2 Heating

The heating control is active only when the unit is in dehumidification mode. The reheats will begin activation when the control temperature has dropped to -66% of the controls proportional band and will deactivate when the temperature setpoint has been reached.

10.7.3 Air Flow

The Liebert CRV’s airflow can be controlled manually or dynamically by temperature sensors. Emerson recommends controlling the fan speed using the remote rack temperature sensors. The remote rack sensors are an accurate representation of the delivery of the Liebert CRV’s discharge air. When using the remote rack temperature sensors, the fan speed will modulate from 50% to 100% based on the remote rack temperature setpoint and the sensitivity of the proportional and integral settings. Manually controlling the Liebert CRV’s fan speed is also possible by setting a fixed fan speed either from the front display or through a monitoring system. The manual control will be overridden for freeze protection, humidification and reheat operation. In the event of a single fan failure the Liebert CRV will ramp the remaining operating fan to 110% of its rated output to compensate for the loss of airflow. In addition, an alarm will be triggered to report which fan failed.

Liebert iCOM® Control

10.7.4 Humidification

The Liebert CRV’s humidification is activated when the measured temperature and humidity sensor has been calculated to exceed the corresponding dew point setpoint. The dew point setpoint is calculated based on the temperature and humidity of the sensor set to control the control setpoint and relative humidity.

Example: Temperature Setpoint 72°F / Humidity Setpoint 50% = 52°F Dew Point

NOTE

The Liebert iCOM control monitors the condition of the air discharging from the unit to protect neighboring electronic equipment. Liebert iCOM will prevent the humidifier from activating if the discharge air is near its saturation point. This protects against discharging fog from the unit or condensation forming on the unit’s supply air baffles. This protection mode is activated when the supply sensor reading is below 53°F (11.7°C) or above 55% relative humidity. When this condition is met a message will display showing “humidifier” suspended.

The status of the humidifier lockout can be viewed in the Service/Diagnostics menu.

These protections do not apply to the external humidifier output.

Liebert® CRV

™

10.8 Liebert iCOM® User Menu Screens

EVENT

LOG

°C / °F

% RH

SET

ALARMS

ACTIVE

ALARMS

1234

RACK VIEW

User Menu password: 1490

U101

U102

U103 U104

PASSWORD (Actual Level 0) ???? Controlling Sensor Remote Sensor

Temperature Setpoint 68°F

Humidity Setpoint 45%

SETPOINTS UNIT 01

for next/previous unit

to select parameter

Supply Sensor

Return Sensor

68° 45%

Remote Sensor

User menus report general cooling unit operations and status. The user menu password is 1490.

The User menu parameter tables in this manual may differ from the display on your cooling unit. The Liebert iCOM functions with several Liebert Precision Cooling units, each with its own set of control commands. In addition, the Liebert iCOM control firmware is being updated constantly. As a result, the User menu parameter tables in this manual may differ from the display on your cooling unit. Check www.liebert.com for the latest Liebert iCOM user manual updates.

Figure 51 User menu icons

Figure 52 Setpoints parameters screen

Liebert iCOM® Control

Controlling Sensor—This parameter allows the user to select which sensor will be used to determine the amount of cooling needed. This parameter can select only a single sensor for both the temperature and fan speed control. Use the Service / Setpoints menu to decouple the operation of fan speed to the remote sensors and the cooling capacity to the supply sensor.

Temperature Setpoint—This parameter allows the user to select a temperature that the cooling unit will maintain by applying cooling and or reheats.

Humidity Setpoint—This parameter allows the user to select a humidity that the cooling unit will maintain by removing or adding moisture to the air.

Spare Part List

Spare Parts—The spare parts lists contains a detailed description and part number that can be used to order parts for the unit. These part numbers are specific to each model and option installed on the unit.

Event Log

Event Log—The event log displays all events and actions that have been generated by the unit. When multiple units are networked you will see the event log of the whole system. Each event shows the unit that generated the alarm, time and date stamp, a description and the event type

65 Liebert® CRV

™

View Network

This window is READ ONLY

U301

U302 U303

U304

U305 U306

U307

U308 U309

U310

U311 U312

Temperature Setpoint °F

Actual Control Temperature °F Fan Setpoint °F

Actual Fan Control Temp °F

Humidity Setpoint % Actual Return Humidity %

Actual Supply Humidity %

Actual CW Temperature °F DigiScroll 1 Temperature °F

SENSOR DATA UNIT 01

View Network—The view network screen provides an overview of the Liebert iCOM® network and a status of each unit. This screen will provide the unique unit name given to the unit. If no name is given, then only the unit number will be displayed.

Figure 53 Sensor data parameters screen

Liebert iCOM® Control

Temperature Setpoint—This parameter shows the cooling setpoint, which is the setpoint used to drive the compressor capacity. This parameter will automatically change based on which sensor is used for control (Return, Supply or Remote sensor).

Actual Control Temperature—This parameter is the temperature reading of the actual sensor that is referenced to U301. This parameter automatically changes based on the control sensor setting.

Fan Setpoint—This parameter defines the fan speed setpoint. This value is not shown when a single sensor (Coupled Mode) is used to control cooling capacity and fan speed. This parameter is calculated by adding the temperature setpoint and the fan speed delta in the Service / Setpoints menu.

Actual Fan Control Temp—This parameter is the temperature reading of the actual sensor that is referenced to U303. This parameter automatically changes based on the control sensor settings.

Humidity Setpoint—This parameter allows the user to select a humidity that the cooling unit will maintain by removing or adding moisture to the air. This parameter is adjustable from 20-80%. The factory default setting from the factory is 50%.

Actual Return Humidity—This parameter is the return relative humidity reading of the sensor.

Actual Supply Humidity—This parameter is the calculated relative humidity of the supply sensor

Liebert® CRV

based on the actual return humidity reading. This value is calculated by using a reverse look up algorithm based on dew point.

Actual CW Temperature—This parameter displays the actual chilled water supply temperature being delivered to the unit.

DigiScroll 1 Temperature—When digital scroll compressors are installed in the unit then the actual digital scroll number 1 head temperature will be shown.

Active Alarms

Active Alarms—Permits viewing all current, active alarms.

™

Figure 54 Display setup parameters screen

to change parameter

for next/previous unit

to select parameter

to confirm

then

S401 S402

S403

S404 S405

S406

S407 S408

S409

S410 S411

Language ENGLISH (US)

Date 7/17/2010 Time 09:20:19

Temperature Indication °F

Display Contrast 50 Buzzer Frequency Off/ 0

Backlite Off after 30 min

Screen Rack View

Display Colors Normal

Date Format mm/dd/yyyy

DISPLAY SETUP SYSTEM

Language—This parameter sets the language on the display. When this parameter is changed all menu parameters will be converted to the selected language.

Liebert iCOM® Control

Date—This parameter sets the internal date of the unit. If this unit is connected to other units with the unit to unit network connection. All units will reflect the last date set.

Time—This parameter sets the internal time of the unit. If this unit is connected to other units with the unit to unit network connection. All units will reflect the last time set.

Temperature Indication—This parameter selects the actual and set point temperature indication. Selecting C will set the unit to display in Celsius and F will set the unit to display in Fahrenheit.

Display Contrast—This parameter changes the contrast of the display to adjust for different viewing angles, low light and bright light conditions. As the display ages the contrast may need to be adjusted for better viewing clarity.

Buzzer Frequency—This parameter changes the audible noise frequency of the built in buzzer. When adjusting the buzzer frequency the buzzer will sound allowing you to select a frequency that is easily detected when an alarm occurs.

Backlite Off After—This parameter controls the length of time that the backlite remains active when the display is unused. When the buttons on the front display have not been pressed for the time selected in this parameter the backlite will turn off, extending the life of the display and saving energy.

Screen—Multiple screen layouts exist for the CRV, Including Rack View and Trends to be monitoring on the main display. Views include a Unit View with or without sensors, Rack View and Graphical Data Record View. See Figure 49 for screen layouts.

Display Colors—This parameter selects the background color. Inverted sets the display to show white font with blue background and Normal sets a white background with blue font.

Date Format—Date format changes the month, day and year arrangement shown on the front display and on event time stamps.

67 Liebert® CRV

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Figure 55 Total run hours parameters screen

U501

U502

U503 U504

U505

U506 U507

U508

U509 U510

U511

Actual Hours Limit

Fan Motor (s) 3513 0 Compressor 1 3511 0

Chilled Water 0 0

Electric Heater 0 0

Humidifier 160 0

Dehumidification 5 0

TOTAL RUN HOURS UNIT 01

to change parameter

for next/previous unit

to select parameter

to confirm

then

SERVICE MENUS

to select parameter

to change level to open requested menu

ESC

to unselect

to navigate

WELLNESS

SET

ALARMS

SERVIC E

+/-

NETWORK

SET UP

RACK

SETU P

°C / °F

% RH

SET

Each parameter shows the actual hours the component has operated and the maximum time the component can operate before the next maintenance.

Liebert iCOM® Control

10.9 Liebert iCOM® Service Menu Screens

Service menus allow customized settings for site operations. The password for service menu parameters is 5010.

The Liebert iCOM control firmware is being updated constantly. As a result, the Service menu parameter tables shown in this manual may be slightly different than what is shown on your cooling unit's display. Please check www.liebert.com for the latest Liebert iCOM User manual updates.

Figure 56 Service Menu Main Screen

Liebert® CRV

™

Figure 57 Setpoints parameters screen - Page 1

S101

S102

S103 S104

S105

S106 S107

S108

S109 S110

S111

PASSWORD (Actual Level 0) ????

Temperature Setpoint 68 °F Temperature Control Sensor Remote Sens or

Temperature Control Type Proportional

Temperature Deadband 2°F Cooling Proportional Band 9°F

Cooling Integration /Derivative min /sec

Heating Proportional Band 9°F Heating Integration /Derivative min /sec

CRV Control Average

SETPOINTS (page 1 of 4) UNIT 01

to change parameter

for next/previous unit

to select parameter

to confirm

then

Temperature Setpoint—This parameter selects a temperature that the cooling unit will maintain by applying cooling and or reheats. This parameter is adjustable from 41-104°F (5-40°C), the factory default setting is 73°F (22.7°C).

Liebert iCOM® Control

Temperature Control Sensor—This sensor controls the cooling capacity of the Liebert CRV. If the unit is chilled water model, then this sensor controls the chilled water valve opening. If the unit is a DX (direct expansion) model then this sensor will control the amount of digital scroll capacity.

Temperature Control Type—This parameter selects the type of control the system will use to activate cooling, heating, humidification and dehumidification. A detailed description of each control type can be found in 3.7 - Supply Control.

Temperature Deadband—This parameter can be set to avoid overshooting of the setpoint and cycling between the reheats and cooling. The value entered into this field will be split in half by the temperature setpoint. Example—If the temperature setpoint is 70°F (21.1°C) and a 4°F (2.2°C) deadband is set, then no cooling will be activated until 72°F (22.2°C) and no heating will be activated until 68°F (20°C) is reached.

Cooling Proportional Band—This parameter adjusts the activation points of compressors or rate of change based on the actual sensor values deviation from setpoint. The smaller this number the faster the compressors and valve(s) will increase capacity. Too small of a number may cause the unit to short cycle the compressors or excessively reposition the valve.

Cooling Integration/Derivative—Cooling integration takes into consideration the amount of time the actual temperature has deviated from the setpoint. The longer this deviation exists the more corrective action the unit will use to achieve the setpoint. The derivative term monitors the rate of change and will reduce or increase the amount of corrective action based on the actual temperature increasing or decreasing toward the temperature setpoint.

69 Liebert® CRV

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Figure 58 Setpoints parameters screen - Page 2

S112

S113

S114 S115

S116

S117 S118

S119

S120 S121

S122

PASSWORD (Actual Level 0) ????

Humidity Setpoint 45%

Humidity C ontrol Type PI Humidity D eadBand 5%

Humidity Proportional Band 5%

Humidity Integration Time 0min Dehum Proportional Band 5%

Dehum Integration Time 0min

Dehum/Heat Low Limit 1 -9°F Low Limit 1 reset 0°F

SETPOINTS (page 2 of 4) UNIT 01

to change parameter

for next/previous unit

to select parameter

to confirm

then

Liebert iCOM® Control

Humidity Control Type—This parameter selects the humidity control calculation. Setting this parameter to “Relative” will control the humidity without considering any temperature deviations. “Predictive” and “Absolute” control consider the temperature deviation from temperature setpoint so that a constant level of moisture is kept in the area based on the humidity sensor reading and the temperature deviation from setpoint. The factory default setting is “Predictive.”

Humidity Deadband—This parameter can be set to avoid overshooting of the setpoint and cycling between humidification and dehumidification. The value entered into this field will be split in half by the temperature setpoint. Example: If the humidity setpoint is 50% and a 4% deadband is set then no humidity control will be activated between 48% and 52%.

Humidity Proportional Band—This parameter adjusts the activation points of the humidifier and compressors based on the actual sensor values deviation from setpoint. The smaller this number the faster the compressors and humidifier will increase capacity, too small of a number may cause the unit to short cycle or overshoot setpoint.

Humidity Integration Time—This parameter adjusts the capacity of the unit based on time away from setpoint so that accurate humidity control can be maintained. This parameter is only active when Control Type is set to “PI.”

Dehum Proportional Band—The parameter adjusts the activation points of dehumidification based on the actual sensor values deviation from setpoint. The smaller this number the faster the compressors and humidifier will increase capacity, too small of a number may cause the unit to short cycle or overshoot setpoint.

Dehum Integration Time—This parameter adjusts the capacity of the unit based on time away from setpoint so that accurate humidity control can be maintained. This parameter is only active when control type is set to “PI”.

Dehum/Heat Low Limit 1—This parameter sets the temperature at which the compressor will be deactivated for dehumidification control. Example—If Low Limit 1 is set to 4°F (2.2°C) and the temperature setpoint is 70°F (21.1°C), then dehumidification will turn off at 66°F (18.8°C).

Low Limit 1 reset—This parameter controls when the temperature has increased enough to reenable dehumidification.

Liebert® CRV

™

Figure 59 Setpoints parameters screen - Page 3

S123

S124

S125 S126

S127

S128 S129

S130

S131 S132

S133

PASSWORD (Actual Level 0) ????

Fan Control Ty pe Aut o

Fan Control Sensor Remote Sensor Fan Regulation Type

Fan Delta °F

Fan Speed Proportional Band °F Fan Speed Int egration min

Fan Speed Manual Setpoint %

Fan Speed STD 75% Fan Speed Min 50%

Fan Speed Dehum 70%

SETPOINTS (page 3 of 4) UNIT 01

to change parameter

for next/previous unit

to select parameter

to confirm

then

Fan Control Type—This parameter sets how the fan speed will be controlled. This parameter can be set to Auto mode, which will allow the Liebert CRV to drive the fan based on the temperature sensor selected for sensor control type. This parameter can also be set to Manual mode, which allows the Liebert CRV to be set to a fixed fan speed either through the local display or through a building management system.

Liebert iCOM® Control

Fan Control Sensor—This parameter sets which sensor will drive the Liebert CRV fans when set to Auto mode for the fan control type.

Fan Regulation Type—This parameter is the fans’ control type. It can be set to Proportional control, which will modulate the fans linearly based on the deviation from the setpoint. PI control is also available and works in the same manner as the temperature control integral term.

Fan Delta—This parameter sets the fan speed setpoint. The delta accounts for the temperature rise from the Supply Air Sensor and the Remote Rack sensors by adding the Fan Delta to the Temperature Setpoint (S102). This eliminates the possibility of setting the remote rack temperature setpoint lower than the supply temperature setpoint.

Fan Speed Proportional Band—This parameter adjusts the fans rate of change based on the actual sensor values deviation from setpoint or the delta. The smaller this number the faster the fan will increase its speed. Too small of a number may cause the fans to excessively reposition.

Fan Speed Integration—This parameter adjusts the fanspeed of the unit based on time away from setpoint. This parameter is only active when Control Type is set to “PI.”

Fan Speed Manual Setpoint—This parameter sets the speed of the fans when the unit is placed into Manual Fan Speed Control mode.

Fan Speed STD—This parameter sets the maximum fan speed of the unit under normal operating circumstances.

Fan Speed Min—This parameter sets the lowest fan speed operation of the unit.

Fan Speed Dehum—This parameter sets the fan speed the unit will operate at during a call for

dehumidification. The fan speed will position to the highest requirement. If the call for fan speed from the remote rack sensor is requesting more CFM than the Dehum fan speed, then the fans will run at the remote sensor fan speed request.

71 Liebert® CRV

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Figure 60 Setpoints parameters screen - Page 4

S134

S135

S136 S137

S138

S139 S140

S141

S142 S143

S144

PASSWORD (Actual Level 0) ????

MIN at CFC for EC Fan 0% STD at CFC for EC Fan 100%

High Temp Limit Approach Supply

High Temp Limit Approach at 2°F

Ball Valve Setpoint Offset 0psig

SETPOINTS (page 4 of 4) UNIT 01

to change parameter

for next/previous unit

to select parameter

to confirm

then

MIN at CFC for EC Fan—This parameter can provide an offset to the minimum fan speed at the minimum call for cooling. When set to 0 / 100 the MIN speed is reached when the call for fan is at 0%; and the STD speed is reached when the call for fan reaches 100%.

Liebert iCOM® Control

For example, if the minimum is set to 20 and the standard is set to 90, the fan speed MIN is reached earlier (the fan operates on lower speed compared to the calculated call for fan), and the STD speed is reached faster when compared to the calculated call for fan.

STD at CFC for EC Fan—This parameter can provide an offset to the minimum fan speed at the minimum call for cooling. When set to 0 / 100 the MIN speed is reached when the call for fan is at 0%; and the STD speed is reached when the call for fan reaches 100%.

High Temp Limit Approach—This parameter sets the sensor that controls the fan speed maximum override. This can be set to Disable, Supply or Return.

NOTE

The Liebert CRV fans are oversized and can be used to help protect equipment in emergency situations, such as high temperature and a single fan failure.

High Temp Limit Approach at— This parameter sets the temperature when the units fan speed can operate above the maximum speed. The maximum override speed during this mode is set in parameter A157 (Advanced menus).

Ball Valve Setpoint Offset—This parameter adjusts the operating compressor discharge pressure by changing the targeted range of control. Available only on water-cooled units.

Unit Diary—Large Display Only

Shows all entered program changes and maintenance performed on the unit.

Table 26 Unit diary parameters

Function

Large Display Small Display

Page 1 of 1

Text entered with iST (Liebert iCOM

Service Tool)

N/A -

Liebert® CRV

™

Range

Imperial (metric)

Figure 61 Standby settings / lead-lag parameters screen

S501

S502

S503 S504

S505

S506 S507

S508

S509 S510

S511

PASSWORD (Actual Level 0) ???? Number of Standby Units 0

Rotation Frequency

Rotate at (hour) Rotate at (minute)

Rotate by

Perform one R otation Casc ade U nits

Start all Standby Units by H T

STANDBY SETTINGS/LEAD-LAG SYSTEM

to change parameter

for next/previous unit

to select parameter

to confirm

then

Number of Standby Units—This parameter selects the number of units that will be in Standby mode. When a unit is in standby mode the fan will be off and no cooling will be provided.

Liebert iCOM® Control

Rotation Frequency—This parameter controls when a rotation will occur between the standby units and the operating units within a network.

Rotate at (hour)—This parameter sets the hour of the rotation

Rotate at (minute)—This parameter sets the minute of the rotation

Rotate by—This parameter determines the number of positions to rotate by. Example: If there are 6

units in a unit to unit network and units 1, 3 & 5 are in standby and this parameter is set to “1” then at the next rotation units 2, 4,& 6 will be placed into standby and 1, 3 & 5 will become operational.

Perform one Rotation—This parameter will manually force a single rotation between units.

Cascade Units—This parameter when set allows units to activate from Standby mode if the room

temperature is unable to be maintained by the non-standby units. If yes is selected then the cascade units can perform all functions when activated from standby. This parameter can also be set for Cooling Only or Cool / Heat only.

Start all Standby Units by HT—This parameter activates all units to cool when a High Temperature alarm occurs.

See 3.9.1 - Calculation of Next Maintenance and Diagnostics for details on these menus.

73 Liebert® CRV

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Figure 62 Wellness basic settings screen- Page 1

S001

S002 S003

S004

S005 S006

S007

S008 S009

S010

S011

PASSWORD (Actual Level 0) ???? Maintenance Frequency Per Year 1

Max Bonus 0

Max Penalty 0 Last Maintenance 06/14/2010

Servic e Engineer Nobody

Confirm PM No Calculated Next Maintenance 06/2011

WELLNESS basic settings (page 1 of 5) SYSTEM

to change parameter

for next/previous unit

to select parameter

to confirm

then

Maintenance Frequency Per Year—This parameter sets the number of expected maintenance visits in a one year time span.

Liebert iCOM® Control

Max Bonus—This parameter will increase the time to the next maintenance cycle. A bonus should be assigned when a service visit finds that all components are working optimally.

Max Penalty—This parameter will decrease the time to the next maintenance cycle. A penalty should be used when a service visit finds excessive wear on components.

Last Maintenance—This parameter is set during the service call. It also indicates to other service personnel the date of the last visit.

Service Engineer—This parameter provides a label for the service representative to list either the company name or representative’s name.

Confirm PM—This parameter confirms that the service representative has completed the preventive maintenance and resets the next maintenance date.

Calculated Next Maintenance—This parameter provides a date to when the next expected maintenance should take place based on the last confirmed PM, component starts, run hours and the penalty / bonus currently set in the Liebert iCOM

control.

Liebert® CRV

™

Figure 63 Wellness motor settings parameters screen - Page 2

S012

S013 S014

S015

S016 S017

S018

S019 S020

S021

S022

PASSWORD (Actual Level 0) ???? Number of Starts 21

Run Hours 3376 hrs

Average Run Time 9645 min Starts per Day Best 1

Starts per Day Worst 24

Number of Alarms 0 Actual Bonus 0

WELLNESS motor settings (page 2 of 5) UNIT 1

to change parameter

for next/previous unit

to select parameter

to confirm

then

Liebert iCOM® Control

Number of Starts—This parameter shows the number of starts for the unit’s fans.

Run Hours—This parameter shows the number of run hours for the unit’s fan.

Average Run Time—This parameter displays the average run time of the unit’s fan.

Starts per Day Best—This parameter displays the lowest number of starts in a rolling 24 hour

period.

Starts per Day Worst—This parameter displays the highest number of starts in a rolling 24 hour period.

Number of Alarms—This parameter displays the number of alarms that have occurred with the unit’s fans.

Actual Bonus—This parameter displays the actual calculation of wellness for the unit’s fans. The unit will always take the value from the worst component for the next maintenance indication.

75 Liebert® CRV

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Figure 64 Wellness compressor 1 settings parameters screen - Page 3

S023

S024 S025

S026

S027 S028

S029

S030 S031

S032

S033

PASSWORD (Actual Level 0) ????

Number of Starts 22 Run Hours 3374hrs

Average Run Time 9201 min

Starts per Day Best 12 Starts per Day W ors t 240

Number of HP Alarms 0

Number of LP Alarms 0 Number of OL Alarms 0

Number of DS H T Alarms 0

Actual Bonus 0

WELLNESS compressor1 settings (page 3 of 5) UNIT 1

to change parameter

for next/previous unit

to select parameter

to confirm

then

Number of Starts—This parameter shows the number of starts for the unit’s compressor.

Liebert iCOM® Control

Run Hours—This parameter shows the number of run hours for the unit’s compressor.

Average Run Time—This parameter displays the average run time of the unit’s compressor.

Starts per Day Best—This parameter displays the lowest number of starts in a rolling 24 hour

period.

Starts per Day Worst—This parameter displays the highest number of starts in a rolling 24 hour period.

Number of HP Alarms—This parameter displays the number of high pressure alarms that have occurred with the unit’s compressor.

Number of LP Alarms—This parameter displays the number of low pressure alarms that have occurred with the unit’s compressor.

Number of OL Alarms—This parameter displays the number of overload alarms that have occurred with the unit’s compressor.

Number of DS HT Alarms—This parameter displays the number of Digital Scroll High Temperature alarms that have occurred with the unit’s compressor.

Actual Bonus—This parameter displays the actual calculation of wellness for the unit’s compressor. The unit will always take the value from the worst component for the next maintenance indication.

Liebert® CRV

™

Figure 65 Wellness electric heater 1 settings parameters screen - Page 4

S034

S035 S036

S037

S038 S039

S040

S041 S042

S043

S044

PASSWORD (Actual Level 0) ????

Number of Starts 0

Run H ours 0hrs Average Run Time 0min

Starts per Day Best 24

Starts per Day W ors t 240 Number of HP Alarms 0

Actual Bonus 0

WELLNESS el heater 1 settings (page 4 of 5) UNIT 1

to change parameter

for next/previous unit

to select parameter

to confirm

then

Screen displayed

only if unit is

equipped with

electric heater

Number of Starts—This parameter shows the number of starts for the unit’s reheats.

Liebert iCOM® Control

Run Hours—This parameter shows the number of run hours for the unit’s reheats.

Average Run Time—This parameter displays the average run time of the unit’s reheats.

Starts per Day Best—This parameter displays the lowest number of starts in a rolling 24 hour

period.

Starts per Day Worst—This parameter displays the highest number of starts in a rolling 24 hour period.

Number of HP Alarms—This parameter displays the number of high pressure alarms that have occurred with the unit’s reheats.

Actual Bonus—This parameter displays the actual calculation of wellness for the unit’s reheats. The unit will always take the value from the worst component for the next maintenance indication.

77 Liebert® CRV

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Figure 66 Wellness humidifier settings parameters screen - Page 5

S045

S046 S047

S048

S049 S050

S051

S052 S053

S054

S055

PASSWORD (Actual Level 0) ????

Number of Starts 14404

Run Hours 154 hrs Average Run Time 0min

Starts per Day Best 24

Starts per Day W ors t 240 Number of Alarms 0

Actual Bonus 0

WELLNESS humidifier settings (page 5 of 5) UNIT 1

to change parameter

for next/previous unit

to select parameter

to confirm

then

Screen displayed

only if unit is

equipped with

humidifier

Number of Starts—This parameter shows the number of starts for the unit’s humidifier.

Liebert iCOM® Control

Run Hours—This parameter shows the number of run hours for the unit’s humidifier.

Average Run Time—This parameter displays the average run time of the unit’s humidifier.

Starts per Day Best—This parameter displays the lowest number of starts in a rolling 24 hour

period.

Starts per Day Worst—This parameter displays the highest number of starts in a rolling 24 hour period.

Number of Alarms—This parameter displays the number of high pressure alarms that have occurred with the unit’s humidifier.

Actual Bonus—This parameter displays the actual calculation of wellness for the unit’s humidifier. The unit will always take the value from the worst component for the next maintenance indication.

Liebert® CRV

™

Figure 67 Diagnostics / service mode parameters screen - Page 1

to change parameter

for next/previous unit

to select parameter

to confirm

then

S301 S302

S303

S304 S305

S306

S307 S308

S309

S310 S311

PASSWORD Actual Level 0) ????

HP 1 Alarm Code 0 LP 1 Alarm Counter 0

HT1 Alarm Counter 0

12h Dehum C ounter 0

Low Supply Temperature Counter 0

Actual LP1 Pressure 169psig

Actual H P1 Pressure 338psig

DIAGNOSTICS/SERVICE MODE (page 1 of 6) UNIT 01

Liebert iCOM® Control

HP 1 Alarm Code—Compressor 1 high pressure alarm code.

LP 1 Alarm Code—Indicates which phase compressor 1 is operating in. For more information on

this refer to the Liebert iCOM

HT 1 Alarm Counter—Compressor 1 high temperature event alarm counter. If more than five events in a rolling 4 hour period occur then the compressor will be locked out.

12h Dehum Counter—

Low Supply Temperature Counter—

Actual LP1 Pressure—Current refrigerant low pressure side reading in atmosphere for

Compressor 1.

Actual HP1 Pressure—Current refrigerant high pressure side liquid reading in atmosphere for Compressor 1. (This is available only on water cooled units equipped with motorized ball valves.)

Training and Service manual’s low pressure transducer flow chart.

79 Liebert® CRV

™

Figure 68 Diagnostics / service mode parameters screen - Page 2

to change parameter

for next/previous unit

to select parameter

to confirm

then

S312 S313

S314

S315 S316

S317

S318 S319

S320

S321 S322

PASSWORD Actual Level 0 ) ????

Manual Mode No Motor(s) On

Compressor 1 Run On

Compressor 1 Capacity On Compressor 1 Cycle Ramp 76 %

Compressor 1 LLSV On

DIAGNOSTICS /SERVICE MODE (page 2 of 6) UNIT 01

to change parameter

for next/previous unit

to select parameter

to confirm

then

S323 S324

S325

S326 S327

S328

S329 S330

S331

S332 S333

PASSWORD Actual Level 0) ????

Electric Heat 1 Off

Dehumidification Output Off

Humidifier Fill

Humidifier Off Humidifier Drain

Humidifier Current A

DIAGNOSTICS /SERVICE MODE (page 3 of 6) UNIT 01

Liebert iCOM® Control

Manual Mode—Use this setting to place the Liebert iCOM initial setting necessary to activate any of the following items.

Motor(s)—Setting this option to ON will start the main fan of the unit. Note that the main fan must be On in order to activate any of the following overrides.

Compressor 1—Use this setting to turn on compressor 1 and select the mode of compressor operation. The operation selections are RUN, EVACUATE and CHARGE.

Compressor 1 Capacity—Use this setting to enable Compressor 1 Cycle Ramp.

Compressor 1 Cycle Ramp—This setting allows the user to select the capacity the compressor

should run at. Range on this is 0 – 100%.

Compressor 1 LLSV—This option will control the liquid line solenoid valve for compressor 1.

Figure 69 Diagnostics / service mode parameters screen - Page 3

control in manual mode. This is the

Liebert® CRV

Electric Heat 1 (or HG/HW)—This will activate stage 1 of the unit’s reheat system.

Dehumidification Output—This activates the dehumidification cycle.

™

Humidifier Fill—This activates just the humidifier water source solenoid valve which fills the

to change parameter

for next/previous unit

to select parameter

to confirm

then

S334 S335

S336

S337 S338

S339

S340 S341

S342

S343 S344

PASSWORD (Actual Level 0) ????

Alarm Relay Off Warning Relay Off

3P Actuator Open Off

3P Acuator Close Off Current Fanspeed

Fanspeed Manual Setpoint

Condenser C ontrol Mode Auto Current MBV /CWV (AnaOut 2) 75%

Manual MBV (AnaOut 2) 100%

Manual CWV (AnaOut 2) %

DIAGNOSTICS /SERVICE MODE (page 4 of 6) UNIT 01

humidifier pan or canister with water.

Humidifier—This activates the humidifier system in its entirety.

Humidifier Drain—This activates just the humidifier drain solenoid in the case of the steam

generating humidifier, allowing water to drain from the canister.

Humidifier Current—In the case of the steam generating humidifier option this setting shows the amount of AC amperes the system is consuming.

Figure 70 Diagnostics / service mode parameters screen - Page 4

Liebert iCOM® Control

Alarm Relay—This allows the user to activate the Liebert iCOM output.

Warning Relay—This allows the user to activate the Liebert iCOM control’s free-cooling relay output.

3P Actuator Open—This setting will energize the open circuit of the 3P type chilled or freecooling control valve thus journeying it to the open state.

3P Actuator Close—This setting will energize the close circuit of the 3P type chilled or freecooling control valve thus journeying it to the closed state.

Current Fanspeed (Read only)—Shows the analog output for the fan in automatic mode.

Fanspeed Manual Setpoint (Read only)—Drives the analog output for the fan in manual mode.

Condenser Control Mode—Defines the condenser control mode in manual or auto mode during

compressor manual mode.

Current MBV / CWV (AnaOut2) (Read only)—Shows the analog output for the MBV (motorized ball valve) or analog CWV (chilled water valve) in automatic mode.

Manual MBV (AnaOut2)—Drives the analog output for the condenser valve (MBV) in manual mode.

Manual CWV (AnaOut2)—Drives the analog output for the analog CWV (chilled water valve) in manual mode.

control’s common alarm relay

81 Liebert® CRV

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Figure 71 Diagnostics / service mode parameters screen - Page 5

to change parameter

for next/previous unit

to select parameter

to confirm

then

S345 S346

S347

S348 S349

S350

S351 S352

S353

S354 S355

PASSWORD Actual Level 0 ) ????

Status R emote Shutdown o-o On Status Airflow 1 o-o OK

Status Airflow 2 o-o OK

Status Filter o-o OK Status C us tomer Input 1 o/o OK

Status C us tomer Input 2 o/o OK

Status C us tomer Input 3 o/o OK Status C us tomer Input 4 o/o OK

Status LSI o-o OK

Status Heaters Safety o/o Act

DIAGNOSTICS /SERVICE MODE (page 5 of 6) UNIT 01

to change parameter

for next/previous unit

to select parameter

to confirm

then

S356 S357

S358

S359 S360

S361

S362 S363

S364

S365 S366

PASSWORD Actual Level 0 ) ????

Status HP1 o/o OK Status LP 1 o-o OK

Status LW D %

Status Liquitech

DIAGNOSTICS /SERVICE MODE (page 6 of 6) UNIT 01

Status Remote Shutdown—This show the status of the unit’s remote shut down input.

Status Airflow 1 & 2—This show the status of the unit’s air proof switches.

Liebert iCOM® Control

Status Filter—This shows the status of the unit’s filter clog switch input.

Status Customer Input 1, 2, 3 & 4—This shows the status of the unit’s customer inputs.

Status LSI—

Status Heaters Safety—(HPM and PEX only) This parameter shows the status of the unit’s reheat

safety switch.

Figure 72 Diagnostics / service mode parameters screen - Page 6

Liebert® CRV

Status HP1—This shows the status of the unit’s compressor 1 high pressure switch input.

Status LP1—This shows the status of the unit’s compressor 1 low pressure switch input.

Status LWD—This shows the status of the unit’s Leakage Water Detector.

Status Liquitech—This shows the status of the unit’s Liebert Liqui-tect

™

liquid detection setup.

Figure 73 Set alarms parameters screen - Page 1

S201

S202

S203 S204

S205

S206 S207

S208

S209 S210

S211

PASSWORD (Actual Level 0) ????

Tem/Hum Events Enabled High Supply Temperature 80 °F

Low Supply Temperature 46 °F

High Return Temperature 104 °F High Return Humidity 60%

Low Return Humidity 15 %

High CW Temperature °F

SET ALARMS (page 1 of 4) UNIT 01

to change parameter

for next/previous unit

to select parameter

to confirm

then

Temp/Hum Events—This parameter enables or disables all of the temperature and humidity events.

Liebert iCOM® Control

High Supply Temperature—This parameter sets the high temperature threshold that will trigger an alarm on the Liebert iCOM

local display and any monitoring system that may be connected.

Low Supply Temperature—This parameter sets the low temperature threshold that will trigger an alarm on the Liebert iCOM local display and any monitoring system that may be connected.

High Return Temperature—This parameter sets the threshold temperature when a return high temperature alarm will occur.

High Return Humidity—This parameter sets the threshold humidity when a return high humidity alarm will occur.

Low Return Humidity—This parameter sets the threshold humidity when a return low humidity alarm will occur.

High CW Temperature—This parameter sets the threshold chilled water when a return high chilled water temperature alarm will occur.

83 Liebert® CRV

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Figure 74 Set alarms parameters screen - Page 2

S211

S212

S213 S214

S215

S216 S217

S218

S219 S220

S221

PASSWORD (Actual Level 0) ???? Cus tomer Input 1 Smoke Alarm

Cus tomer Input 1 active when Closed

Cus tomer Input 2 Fire Alarm Cus tomer Input 2 active when Closed

Customer Input 3 C PMP Alarm SD

Cus tomer Input 3 active when Closed Cus tomer Input 4 HUM

Cus tomer Input 4 active when Closed

SET ALARMS (page 2 of 4) UNIT 01

to change parameter

for next/previous unit

to select parameter

to confirm

then

S223

S224

S225 S226

S227

S228 S229

S230

S231 S232

S233

PASSWORD (Actual Level 0) ????

DELAY EN-DIS TYPE

LOSS OF POWER ENABLE WRN

SMOKE DETECTED 5 ENABLE ALM WATER UNDER FLOOR 5 ENABLE ALM

LOSS OF FLOW 5 ENABLE ALM

CUSTOMER INPUT 1 5 ENABLE ALM REHEAT LOCKOUT 5 ENABLE ALM

HUMIDIFIER LOCKOUT 5 ENABLE ALM

COMPRESSOR(S) LOCKOUT 5 ENABLE ALM

SET ALARMS (page 3 of 4) UNIT 01

to change parameter

for next/previous unit

to select parameter

to confirm

then

Customer Input 1, 2, 3 & 4—These parameters select the device and operation of the customer inputs. Each event reflects a different alarm and possible action to the unit. Refer to table 7 for a description of selectable options.

Liebert iCOM® Control

Customer Input 1, 2, 3 & 4 active when—These parameters select whether the input is a normally closed or normally closed input.

Figure 75 Set alarms parameters screen - Page 3

Liebert® CRV

This screen selects the operation of an active alarm. Each event can be enabled or disabled and can be set to operate as an alarm, warning or message. The delay is the time the control waits before reporting the event.

• Alarm: Annunciates the buzzer, triggers a monitoring event, triggers the alarm relay and flashes the red LED on the display

• Warning / Alarm: Annunciates the buzzer, triggers a monitoring event, shows the event in the event viewer / front display and flashes the red LED on the display.

• Message: Shows the event in the event viewer and on the front display.

™

Figure 76 Set alarms parameters screen - Page 4

S234

S235 S236

S237

S238 S239

S240

S241 S242

S243

S244 S245

S246

PASSWORD (Actual Level 0) ????

DELAY EN-DIS TYPE

CALL SERVICE 5 ENABLE ALM HIGH TEMPERATURE 5 ENABLE ALM

HEAT REJ VFD 0 ENABLE ALM HEAT REJ TVSS 0 ENABLE ALM

CONDENSER 1 FAILURE 0 ENABLE WRN CUSTOMER INPUT 2 5 ENABLE ALM

CUSTOMER INPUT 3 5 ENABLE ALM

CUSTOMER INPUT 4 5 ENABLE ALM

SET ALARMS (page 4 of 4) UNIT 01

Liebert iCOM® Control

• Alarm: Annunciates the buzzer, triggers a monitoring event, triggers the alarm relay and flashes the red LED on the display

• Warning / Alarm: Annunciates the buzzer, triggers a monitoring event, shows the event in the event viewer / front display and flashes the red LED on the display.

• Message: Shows the event in the event viewer and on the front display.

85 Liebert® CRV

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Figure 77 Sensor calibration / setup parameters - Page 1

to change parameter

for next/previous unit

to select parameter

to confirm

then

S601 S602

S603

S604 S605

U606

S607 S608

S609

S610 S611

PASSWORD Actual Level 0 ) ????

Ret urn Temperature +0°F Calibrated Return Temperature 77°F

Return Humidity +0.0%

Calibrated Return Humidity 26.0% Digiscroll 1 NTC +0°F

Calibrated Digiscroll 1 NTC 200°F

SENSOR CALIBRATION/SETUP (page 1 of 4) UNIT 01

to change parameter

for next/previous unit

to select parameter

to confirm

then

S612 S613

S614

S615 S616

S617

S618 S619

S620

S621 S622

PASSWORD Actual Level 0) ????

Ret urn T S ensor PTC or NTC NTC Ret urn T Sens or +0°F

Calibrated Return T Sensor °F

Supply T Sensor PTC or NTC NTC Supply T Sensor +1°F

Calibrated Supply T Sensor 75°F

CW T Sensor °F Calibrated CW T Sensor °F

SENSOR CALIBRATION/SETUP (page 2 of 4) UNIT 01

Return Temperature—This parameter adjusts the return temperature reading from the actual sensor to compensate for any error of the sensor or to match other sensors in the room.

Liebert iCOM® Control

Calibrated Return Temperature—This parameter shows the adjusted temperature value of the return sensor. This value is the actual sensor reading (+ or -) the offset “Return Temperature”.

Return Humidity—This parameter adjusts the return humidity reading from the actual sensor to compensate for any error of the sensor or to match other sensors in the room.

Calibrated Return Humidity—This parameter shows the adjusted humidity value of the return sensor. This value is the actual sensor reading (+ or -) the offset “Return Humidity”.

Digiscroll 1 NTC—This parameter adjusts the digital scroll 1 NTC reading from the actual sensor to compensate for any error or drift of the sensor.

Calibrated Digiscroll 1 NTC—This parameter shows the adjusted Digital Scroll 1 NTC sensor value. This value is the actual sensor reading (+ or -) the offset “Digital Scroll 1 NTC”.

Figure 78 Sensor calibration / setup parameters - Page 2

Liebert® CRV

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Return T Sensor PTC or NTC—This parameter selects the type of sensor being used for the return

to change parameter

for next/previous unit

to select parameter

to confirm

then

S623 S624

S625

S626 S627

S628

S629 S630

S631

S632 S633

PASSWORD Actual Level 0) ????

Rac k Temperature Sens or 1 +0°F 77°F Rac k Temperature Sens or 2 +0°F 78°F

Rac k Temperature Sens or 3 +0°F 77°F

Rac k Temperature Sens or 4 +0°F 77°F Rac k Temperature Sens or 5 +0°F 78°F

Rac k Temperature Sensor 6 +0°F °F

Rac k Temperature Sensor 7 +0°F °F Rac k Temperature Sensor 8 +0°F °F

Rac k Temperature Sensor 9 +0°F °F

Rac k Temperature Sensor 10 +0°F °F

SENSOR CALIBRATION/SETUP (page 3 of 4) UNIT 01

air sensor.

Return T Sensor—This parameter can provide an offset to the actual sensor reading to calibrate the units sensor to other sensors.

Calibrated Return T Sensor—This parameter is the reading after the offset has been added to or subtracted from the actual sensor reading.

Supply T Sensor PTC or NTC—This parameter sets the type of sensor that is connected to the unit. It is set at the factory as NTC and should be changed only by a certified Emerson technician.

Supply T Sensor—This parameter can provide an offset to the actual sensor reading to calibrate the unit’s sensor to other sensors.

Calibrated Supply T Sensor—This parameter is the reading after the offset has been added to or subtracted from the actual sensor reading.

CW T Sensor—This parameter can provide an offset to the actual sensor reading to calibrate the unit’s sensor to other sensors.

Calibrated CW T Sensor—This parameter is the reading after the offset has been added to or subtracted from the actual sensor reading.

Figure 79 Sensor calibration / setup parameters - Page 3

Liebert iCOM® Control

This unit can be equipped with a total of 20 rack sensor readings or 10 2T temperature sensor modules. This menu provides the ability to calibrated by entering a negative or positive offset. The calibrated reading is displayed in the far right column. If a value is not shown in the far right column, then the sensor is either not setup correctly or is not connected.

87 Liebert® CRV

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Figure 80 Sensor calibration / setup parameters - Page 4

to change parameter

for next/previous unit

to select parameter

to confirm

then

S634 S635

S636

S637 S638

S639

S640 S641

S642

S643 S644

PASSWORD Actual Level 0) ????

Rac k Temperature Sensor 1B °F 77°F Rac k Temperature Sensor 2B °F 78°F

Rac k Temperature Sensor 3B °F 77°F

Rac k Temperature Sensor 4B °F 77°F Rac k Temperature Sensor 5B °F 78°F

Rac k Temperature Sensor 6B +0°F °F

Rac k Temperature Sensor 7B +0°F °F Rac k Temperature Sensor 8B +0°F °F

Rac k Temperature Sensor 9B +0°F °F

Rac k Temperature Sensor 10B + 0°F °F

SENSOR CALIBRATION/SETUP (page 4 of 4) UNIT 01

S801

S802

S803 S804

S805

S806 S807

S808

S809 S810

S811

PASSWORD (Actual Level 0) ???? Number of Connected Units 1

Teamw ork Mode No

Teamw ork Mode 1 based on

Conf iguration Safe OK No

Network Safe OK No SW Version CRB 2.00.006.STD

SYSTEM / NETWORK SETUP (page 1 of 2) SYSTEM

to change parameter

for next/previous unit

to select parameter

to confirm

then

Liebert iCOM® Control

Figure 81 System / network setup parameters—System - Page 1

Liebert® CRV

Number of Connected Units—This parameter sets the number of units that will be viewable from the large display and will participate on the unit to unit network.

Teamwork Mode—This parameter selects which teamwork mode to use within a selected group. Teamwork modes are described in section 4.0 of this manual.

Teamwork Mode 1 based on— Configuration Safe—This parameter saves or loads configuration settings for the display that have

been modified from the factory defaults to an internal file that can be downloaded / uploaded using the Liebert iCOM

Service Tool. Selecting “Save” will write the settings to the internal storage file and selecting “Load” will write the settings from the internal storage file to the application software. The internal file is updated every 12 hours automatically.

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Network Safe—This parameter saves or loads network settings for the display that have been

S812

S813

S814 S815

S816

S817 S818

S819

S820 S821

S822

PASSWORD (Actual Level 0) ????

IP Address 10.203 .062 .150 Netmask 255.255.255.192

Gateway 10.203.062.129

MAC 00:00:68:19:0B:58 U2U Protocol GBP

U2U Address 33

U2U Group 13

Bootloader Variables Changed No

SYSTEM / NETWORK SETUP (page 2 of 2) SYSTEM

to change parameter

for next/previous unit

to select parameter

to confirm

then

modified from the factory defaults to an internal file that can be downloaded / uploaded using the Liebert iCOM

Service Tool. Selecting “Save” will write the settings to the internal storage file and

selecting “Load” will write the settings from the internal storage file to the application software.

SW Version—This parameter contains the application software version loaded into the Liebert iCOM display.

Figure 82 System / network setup parameters—large display only System - Page 2

Liebert iCOM® Control

IP Address—This parameter contains the network address of the display. This address must be unique to every other device on the network.

Netmask—Not currently used.

Gateway—Not currently used.

MAC—The MAC address is a unique hardware identifier of the Ethernet device.

U2U Protocol—This parameter is always set to GBP.

U2U Address—This parameter is a unique identifier for each unit on the network. Display addresses

range from 33 to 64. Each display on the U2U network must have a different U2U address.

U2U Group—This parameter is used to create zones or groups within a U2U network. Once a group number is selected the display will only see other devices with the same group number. The group number can be changed to view other devices in different groups.

Bootloader Variables—This parameter indicates if there has been a change to the bootloader since it was last loaded. This parameter should only be activated by an authorized service person.

89 Liebert® CRV

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Figure 83 System/Network setup parameters Unit- Page 1

S823

S824

S825 S826

S827

S828 S829

S830

S831 S832

S833

PASSWORD (Actual Level 0) ????

Monitoring Address 3

Monitoring Timeout /H andshake No/ 0

Unit Name UNIT

Conf iguration Safe Changed No Network Safe OK No

SW Version CRM 2.00.006.STD

SYSTEM / NETWORK SETUP (page 1 of 2) UNIT 01

to change parameter

for next/previous unit

to select parameter

to confirm

then

Liebert iCOM® Control

Monitoring Address—This parameter sets the address used by the Liebert IntelliSlot is set to 3 from the factory and should not be changed.

Monitoring Timeout/Handshake—This parameter can be used with a building management system to verify communications has not been lost between the Liebert iCOM If the amount of time specified in this parameter elapses before the BMS writes a new value then an alarm will occur “BMS TIMEOUT” and the temperature setpoint will revert to the backup setpoint and the fan speed “if equipped” will change to 100%. To disable this feature write a zero to this parameter when it is active.

Unit Name—This parameter is a label to identify the unit from the local or remote display. This label will show at the top right of every screen that has monitoring or configuration of that unit.

Configuration Safe—This parameter saves or loads configuration settings for the control board that have been modified from the factory defaults to an internal file that can be downloaded / uploaded using the Liebert iCOM Service Tool. Selecting “Save” will write the settings to the internal storage file and selecting “Load” will write the settings from the internal storage file to the application software. The internal file is updated every 12 hours automatically.

Network Safe—This parameter saves or loads network settings for the control board that have been modified from the factory defaults to an internal file that can be downloaded / uploaded using the Liebert iCOM Service Tool. Selecting “Save” will write the settings to the internal storage file and selecting “Load” will write the settings from the internal storage file to the application software.

SW Version—This parameter contains the application software version loaded onto the Liebert iCOM control board.

cards. This

control and the BMS.

Liebert® CRV

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Figure 84 System/Network setup parameters Unit - Page 2

Attention: any changes done on these parameters must befollowed by a 'Save+Reboot' command.

S834

S835

S836 S837

S838

S839 S840

S841

S842 S843

S844

PASSWORD (Actual Level 0) ???? Monitoring Protocol Velocity V4

IP Address 10.203 .062 .178

Netmask 255.255.255.192 Gateway 10.203.062.129

MAC 00:00:68:1E:2D:16

U2U Protocol GBP U2U Address 1

U2U Group 13

Bootloader Variables OK N o Static RAM OK No

SYSTEM / NETWORK SETUP (page 2 of 2) UNIT 01

Liebert iCOM® Control

Monitoring Protocol—This parameter selects the monitoring protocol. Velocity V3 is the factory default which will provide communications to the Liebert IntelliSlot the 77/78 terminals for communications to the Liebert SiteLink units.

IP Address—This parameter contains the network address of the display. This address must be unique to every other device on the network.

Netmask—Not currently used.

Gateway—Not currently used.

MAC—The MAC address is a unique hardware identifier of the Ethernet device.

U2U Protocol—This parameter is always set to GBP.

U2U Address—This parameter is a unique identifier for each unit on the network. Display addresses

range from 33 to 64. Each display on the U2U network must have a different U2U address.

Bootloader Variables—This parameter indicates if there has been a change to the boot loader since it was last loaded. This parameter should only be activated by an authorized service person.

Static RAM—

housing. iGMNet will activate

(-E). Hironet is used only on HPM

91 Liebert® CRV

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Figure 85 Rack Overview, Page 1

Rack Overview (page 1 of 1) UNIT 01

All temperatures shown in °F

Cold Aisle

CC21

BB01

BB02

BB03

EC50

EC51

to change parameter

for next/previous unit

to select parameter

to confirm

then

S901 S902

S903

S904 S905

S906

S907 S908

S909

S910 S911

PASSWORD Actual Level 0) ????

Remote Sens or Node 01 Control Remote Sens or Node 02 Control

Remote Sens or Node 03 Control

Remote Sens or Node 04 Control Remote Sens or Node 05 Control

Remote Sens or Node 06 Control

Remote Sens or Node 07 Disable Remote Sens or Node 08 Disable

Remote Sens or Node 09 Disable

Remote Sens or Node 10 Disable

RACK SETUP (page 1 of 3) UNIT 01

This screen shows the rack label assigned to each rack and the temperature associated with the rack sensor. This screen shows the relative distance between the Liebert CRV and each rack sensor.

Liebert iCOM® Control

Figure 86 Rack Setup, Page 1

Rack Sensors are automatically detected when connected and set to “Control.” A maximum of 10

Liebert® CRV

2T sensors can be connected; the control automatically detects the type.

Control—The Liebert CRV is using the sensor for temperature control.

Reference—The sensor value is shown, but not used for temperature control.

Disable—No sensor connected.

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Emerson Liebert User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

MODEL NUMBER NOMENCLATURE - 25 DIGIT CONFIGURATION NUMBER

SAVE THESE INSTRUCTIONS

Important Safety 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

Figure 7 Liebert CRV center of gravity

Table 2 Center of gravity

Table 3 Weights without packaging

Table 4 Shipping weights

3.2.1 Handling the Unit While it is Packaged

Figure 8 Recommended unit handling equipment

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

5.1.1 Condensate Piping—Field-Installed

Gravity Drain—Units Without Factory-Installed Condensate Pump

Figure 13 Gravity drain

Condensate Pump

5.1.2 Humidifier Supply Water—Optional Steam Generating Canister

5.1.3 Requirements of Systems Using Water or Glycol

General Guidelines

Leak Checking of Unit and Field Piping

6.0 REFRIGERANT CONNECTIONS

6.1 Piping Guidelines—Air-Cooled Units

6.2 Refrigerant Piping—Air-Cooled Models

Figure 14 Top refrigerant piping connections

Figure 15 Bottom refrigerant piping connections

6.2.1 General Layout

Table 5 Condenser positioning

Table 6 Liebert CRV position relative to the remote condenser

Figure 16 Pipeline air conditioner - condenser

6.2.2 Pipe Diameter and Thickness

Table 8 Recommended refrigerant line sizes for Liebert Lee-Temp condensers with R-410A Cu, OD

Table 9 Piping and refrigerant sizes for Liebert air-cooled, VFD control condensers with R-410A

6.2.3 Installing Piping

Figure 17 Connections—air-cooled models

Table 11 Unit connections, air-cooled models

6.3 Vacuum and Refrigerant Charge

Table 12 R-410A refrigerant and oil charge for air-cooled models

Table 14 Air-cooled condenser refrigerant charge

Table 15 Refrigerant and oil charge for water-cooled models

Figure 18 Connections for vacuum creation and refrigerant charge

6.3.1 Evacuation Air-Cooled Models

Variable Fan Speed Control Leak Check and Evacuation Procedure

Variable Fan Speed Charging

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