User ManualTable of ContentsModel Number Nomenclature - 25 Digit Configuration Number2Important Safety Instructions9Save These Instructions91.0 Liebert CRV Component Location12Figure 1 Component location, common components—All models12Figure 2 Component location - Liebert CR035RA, CR020RA air-cooled units12Figure 3 Component location - Liebert CR035RW, CR020RW water/glycol-cooled units13Figure 4 Component location - Liebert CR040RC chilled water units13Figure 5 Overall dimensions / service area14Table 1 Dry weight, all model types, ± 5%142.0 Introduction152.1 Product Description15Figure 6 Liebert CRV, front and rear views153.0 Inspection and Unpacking163.1 Equipment Inspection163.1.1 Packing Material163.2 Handling16Figure 7 Liebert CRV center of gravity16Table 2 Center of gravity17Table 3 Weights without packaging17Table 4 Shipping weights173.2.1 Handling the Unit While it is Packaged17Figure 8 Recommended unit handling equipment173.3 Moving the Unit Using Rigging18Figure 9 Moving the unit using rigging183.4 Unpacking the Liebert CRV18Figure 10 Unpacking the Liebert CRV193.5 Removing the Unit from the Skid19Figure 11 Removing the unit from the skid203.6 Reattach the Baffle Panel204.0 Prepare the Liebert CRV for Installation21Figure 12 Adjust leveling feet215.0 Piping225.1 Fluid Connections225.1.1 Condensate Piping—Field-Installed23Gravity Drain—Units Without Factory-Installed Condensate Pump23Figure 13 Gravity drain23Condensate Pump235.1.2 Humidifier Supply Water—Optional Steam Generating Canister235.1.3 Requirements of Systems Using Water or Glycol24General Guidelines24Leak Checking of Unit and Field Piping256.0 Refrigerant Connections266.1 Piping Guidelines—Air-Cooled Units276.2 Refrigerant Piping—Air-Cooled Models27Figure 14 Top refrigerant piping connections27Figure 15 Bottom refrigerant piping connections276.2.1 General Layout28Table 5 Condenser positioning28Table 6 Liebert CRV position relative to the remote condenser28Figure 16 Pipeline air conditioner - condenser296.2.2 Pipe Diameter and Thickness29Table 7 Piping and refrigerant sizes for Liebert Lee-Temp™ condensers with R-410A29Table 8 Recommended refrigerant line sizes for Liebert Lee-Temp condensers with R-410A Cu, OD29Table 9 Piping and refrigerant sizes for Liebert air-cooled, VFD control condensers with R-410A30Table 10 Recommended refrigerant line sizes for Liebert air-cooled, VFD control condensers with R-410A, Cu, OD306.2.3 Installing Piping31Figure 17 Connections—air-cooled models32Table 11 Unit connections, air-cooled models336.3 Vacuum and Refrigerant Charge34Table 12 R-410A refrigerant and oil charge for air-cooled models34Table 13 Refrigerant charge 134Table 14 Air-cooled condenser refrigerant charge34Table 15 Refrigerant and oil charge for water-cooled models34Figure 18 Connections for vacuum creation and refrigerant charge356.3.1 Evacuation Air-Cooled Models35Variable Fan Speed Control Leak Check and Evacuation Procedure35Variable Fan Speed Charging367.0 Water Connections37Table 16 Water connection options37Table 17 Volume of CRV internal water circuits377.1 Water Connections—Supply Humidifier and Drain Water, All Models37Figure 19 Water connection points, bottom entry377.2 Glycol Mixture38Table 18 Glycol mixtures387.3 Water Connections: Water/Glycol-Cooled Models387.3.1 Notes for Open-Circuit Applications387.3.2 Notes for Closed-Circuit Applications387.4 Chilled Water Connections: Chilled Water Units39Figure 20 Chilled water connections39Figure 21 Chilled water circuit39Figure 22 Air bleeding valve position CW40Figure 23 Connections—water/glycol models41Table 19 Unit connections, water/glycol-cooled models42Figure 24 Connections—chilled water models43Table 20 Unit connections, chilled water models44Figure 25 Recommended drycooler Installation448.0 Electrical Connections458.1 Electrical connections45Figure 26 Remove electrical panel and lower front panel45Figure 27 Power and control cable entry points and routing468.1.1 Power Supply Cable Connections46Wiring Connections468.2 Protective Features of the Electrically Commutated Fans478.3 Protective Features of Electrical Heaters47Figure 28 Electrical heating with temperature sensor protection479.0 Startup489.1 Initial Startup48Checks to Perform after Startup499.2 Automatic Restart49Figure 29 Refrigerant line components499.3 Chilled Water Valve: Chilled Water Models50Figure 30 Position of the chilled water valve actuator (for 2- or 3-way valve)509.4 Adjust Baffles to Direct Air Properly50Figure 31 Adjust the baffles to ensure correct airflow direction51Figure 32 Adjust air-blocking plate529.5 Remote Rack Sensor Wiring52Figure 33 Figure 2T rack sensor539.5.1 DIP Switch Settings53Figure 34 DIP switches in 2T sensors53Table 21 DIP switch settings539.5.2 Set 2T Rack Sensor Identities—DIP Switch settings54Figure 35 Setting 2T Sensor DIP Switches549.5.3 Terminating the Last 2T Sensor on a Network54Figure 36 Termination jumper setting559.5.4 Route the CAN bus wire into the cooling unit559.5.5 Installing 2T sensors on racks56Figure 37 2T rack sensors installed on neighboring racks569.5.6 Remote Rack Sensor Operation and Rack View Setup57Figure 38 Rack setup screen, page 1 of 357Figure 39 Rack setup screen, page 2 of 357Figure 40 Rack setup screen, page 3 of 358Figure 41 Rack overview screen5810.0 Liebert iCOM® Control59Table 22 Keyboard icons and functions59Figure 42 Liebert iCOM® default screen symbols6010.1 Navigating Through the Liebert iCOM Menus6010.1.1 Control Interface6010.1.2 Accessing Submenus60Accessing Submenus on Large Displays6010.1.3 Entering a Password61Figure 43 Entering a password61Figure 44 Menu tree—Large display, stand-alone6210.1.4 Viewing Multiple Units with a Networked Large Display63Figure 45 Menu tree—Large display, networked63Figure 46 User menu icons64Table 23 User menu icons64Figure 47 Service menu icons65Table 24 Service menu icons6510.2 Liebert iCOM® Display Readout67Figure 48 Liebert CRV system screen67Figure 49 Liebert iCOM® menu components for Liebert CRV6810.3 Liebert iCOM® Control Setup69Figure 50 Setpoint screen69Table 25 Controlling sensor settings7010.4 Event Log7010.5 Spare Part List7010.6 Wellness—Next Maintenance Calculation7010.6.1 Calculation of Next Maintenance and Diagnostics70Calculating Unit Wellness71Parameters for Next Maintenance Calculation7110.7 Liebert CRV Operation—Liebert iCOM® Control7210.7.1 Cooling7210.7.2 Heating7210.7.3 Air Flow7210.7.4 Humidification7210.8 Liebert iCOM® User Menu Screens73Figure 51 User menu icons73Figure 52 Setpoints parameters screen73Spare Part List73Event Log73View Network74Figure 53 Sensor data parameters screen74Active Alarms74Figure 54 Display setup parameters screen75Figure 55 Total run hours parameters screen7610.9 Liebert iCOM® Service Menu Screens76Figure 56 Service Menu Main Screen76Figure 57 Setpoints parameters screen - Page 177Figure 58 Setpoints parameters screen - Page 278Figure 59 Setpoints parameters screen - Page 379Figure 60 Setpoints parameters screen - Page 480Unit Diary—Large Display Only80Table 26 Unit diary parameters80Figure 61 Standby settings / lead-lag parameters screen81Figure 62 Wellness basic settings screen- Page 182Figure 63 Wellness motor settings parameters screen - Page 283Figure 64 Wellness compressor 1 settings parameters screen - Page 384Figure 65 Wellness electric heater 1 settings parameters screen - Page 485Figure 66 Wellness humidifier settings parameters screen - Page 586Figure 67 Diagnostics / service mode parameters screen - Page 187Figure 68 Diagnostics / service mode parameters screen - Page 288Figure 69 Diagnostics / service mode parameters screen - Page 388Figure 70 Diagnostics / service mode parameters screen - Page 489Figure 71 Diagnostics / service mode parameters screen - Page 590Figure 72 Diagnostics / service mode parameters screen - Page 690Figure 73 Set alarms parameters screen - Page 191Figure 74 Set alarms parameters screen - Page 292Figure 75 Set alarms parameters screen - Page 392Figure 76 Set alarms parameters screen - Page 493Figure 77 Sensor calibration / setup parameters - Page 194Figure 78 Sensor calibration / setup parameters - Page 294Figure 79 Sensor calibration / setup parameters - Page 395Figure 80 Sensor calibration / setup parameters - Page 496Figure 81 System / network setup parameters—System - Page 196Figure 82 System / network setup parameters—large display only System - Page 297Figure 83 System/Network setup parameters Unit- Page 198Figure 84 System/Network setup parameters Unit - Page 299Figure 85 Rack Overview, Page 1100Figure 86 Rack Setup, Page 1100Figure 87 Rack Setup, Page 2101Figure 88 Rack Setup, Page 3101Figure 89 Options setup parameters - Page 1102Figure 90 Options setup parameters - Page 2103Table 27 Service contact info parameters10411.0 Operation in Teamwork Mode10511.1 Unit-to-Unit Network Wiring10511.2 Liebert iCOM U2U Ethernet Network10511.3 Wiring a Liebert iCOM® U2U Network106Figure 91 U2U network setup diagram106Wall-Mount Large Display107Figure 92 Wiring a large display for U2U network operation10711.4 Teamwork Modes107Figure 93 Teamwork modes and sensor management10811.4.1 Application of Teamwork Modes10811.4.2 No Teamwork10811.4.3 Teamwork Mode 1108Figure 94 Teamwork Mode 1 with two cooling units10911.4.4 Teamwork Mode 210911.4.5 Standby—Rotation110Typical Standby (Lead/Lag) Function110Standby and Cascade11012.0 Operation111Figure 95 Return air temperature and humidity sensor viewed from the rear of the unit11112.1 Alarms/Events11313.0 Calibration and Regulation after Startup11413.1 Thermostatic Expansion Valve11413.1.1 Determine Suction Superheat11413.1.2 Adjust Superheat Setting with the TEV11413.2 Environmental Protection11414.0 Maintenance11514.1 Safety Instructions11514.2 Spare Parts11614.3 Maintenance Schedule116Table 28 Maintenance schedule11614.4 Inspect and Replace the Air Filter117Figure 96 Air filter location and input power safety switch117Figure 97 Remove the air filters118Figure 98 Differential pressure switch tubes11814.5 Condensate Drain and Condensate Pump Systems11914.5.1 Condensate drain11914.5.2 Condensate Pump, Dual-Float119Figure 99 Condensate pump11914.6 Air-Cooled Condenser and Drycoolers11914.7 Electrical Heaters11914.8 Dismantling the Unit12014.9 F-Gas Regulation (EC) No. 842/200612015.0 Troubleshooting122Table 29 Unit diagnostics122Table 30 Liebert iCOM® medium control board DIPswitch settings123Appendix A - Humidifier124A.1 Principal of Operation124Figure 100 General diagram—humidifier operation124A.1.1 Humidifier Water Supply and Plumbing125A.1.2 Humidifier Water Connection125Figure 101 Water connection to humidifier125A.1.3 Humidifier Startup and Operation126A.1.4 Low Water Conductivity126A.1.5 Cylinder Replacement126Remove the Old Cylinder127Installing the New Cylinder127Figure 102 Sensor pins, cylinder plugs127Humidifier Maintenance127Extended Shutdown127A.1.6 Humidifier Troubleshooting128Terms Used128A.2 Remote Rack Sensor Troubleshooting128Figure 103 CAN bus and Ethernet cable wiring128A.3 Starting Point129Table 31 Humidifier troubleshooting130Appendix B - Electrical Data131Table 32 Liebert CRV electrical data - 60Hz (Amps)131Table 33 Calibration of electrical components131Appendix C - Electrical Field Connections Descriptions132C.1 Standard Electrical Connections132C.2 Electrical Connections for Optional Features132Figure 104 Electrical field connections133Appendix D - Refrigeration and Hydraulic Circuits134Figure 105 General arrangement—air-cooled units134Figure 106 General arrangement—water-glycol units135Figure 107 General arrangement—chilled water136Size: 8.66 MBPages: 140Language: EnglishOpen manual