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Refrigerant Connections

Liebert® CRV™26

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.

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.

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

Model

Base

Refrigerant

Charge1

lb (kg)

Base Oil Charge1

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)

Initial Oil

Charge

oz (kg)

Max. Topping

Up

oz (kg)

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.

Table 13 Refrigerant charge1

External Pipe Diameter

in (mm)

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)

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 16Pipeline air condit ioner - condenser

Table 14 Air-cooled condenser refrigerant charge

Model

VFD

Liebert Lee-Temp™

(inc. receiver)

lb (kg) lb (kg)

28 K 7 (3.2) 41 (18.6)

60 K 16 (7.3) 75 (34.0)

90 K 25 (11.3) 109 (49.4)

Table 15 Refrigerant and oil charge for water-cooled models

Model

R-410A

Refrigerant Charge

Initial Oil

Charge1

lb (kg) oz (kg)

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.

Contents

Main MODEL NUMBER NOMENCLATURE - 25 DIGIT CONFIGURATION NUMBER TABLE OF CONTENTS Page FIGURES Page Page TABL ES IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS Page Page 1.0 LIEBERT CRV COMPONENT LOCATION Figure 1 Component location, common componentsAll 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% B S S Rear A Rear 2.0 I 2.1 Product Description 3.0 INSPECTION AND UNPACKING R 3.1 Equipment Inspection 3.1.1 Packing Material 3.2 Handling 3.2.1 Handling the Unit While it is Packaged 3.3 Moving the Unit Using Rigging 3.4 Unpacking the Liebert CRV 3.5 Removing the Unit from the Skid 3.6 Reattach the Baffle Panel 4.0 PREPARE THE LIEBERT CRV FOR INSTALLATION 5.0 P 5.1 Fluid Connections 5.1.1 Condensate PipingField-Installed Gravity DrainUnits Without Factory-Installed Condensate Pump Condensate Pump CORRECT INCORRECT 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 GuidelinesAir-Cooled Units 6.2 Refrigerant PipingAir-Cooled Models 6.2.1 General Layout Figure 16 Pipeline air conditioner - condenser B 6.2.2 Pipe Diameter and Thickness Table 8 Recommended refrigerant line sizes for Liebert Lee-Temp condensers with R-410A Cu, OD A (Distance) D = A + B + C CDT = Conditioner COND = Condenser Table 9 Piping and refrigerant sizes for Liebert air-cooled, VFD control condensers with R-410A 6.2.3 Installing Piping Refrigerant Connections Top Connections Liebert CRV24 Figure 17 Connectionsair-cooled models (possible with raised floor) RG RL 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 13 Refrigerant charge Table 14 Air-cooled condenser refrigerant charge Table 15 Refrigerant and oil charge for water-cooled models 6.3.1 Evacuation Air-Cooled Models Variable Fan Speed Control Leak Check and Evacuation Procedure Variable Fan Speed Charging 7.0 WATER CONNECTIONS 7.1 Water ConnectionsSupply Humidifier and Drain Water, All Models 7.2 Glycol Mixture 7.3 Water Connections: Water/Glycol-Cooled Models 7.3.1 Notes for Open-Circuit Applications 7.3.2 Notes for Closed-Circuit Applications Liebert CRV Page Water Connections 33 Liebert CRV Figure 23 Connectionswater/glycol models HS CP Bottom Connections Top Connections (possible with raised floor) DPN001793 Rev. 2 Rear Table 19 Unit connections, water/glycol-cooled models Figure 24 Connectionschilled water models DPN001794 Rev. 2 Figure 25 Recommended drycooler Installation Table 20 Unit connections, chilled water models See hydraulic drawings in the Appendix D 8.0 ELECTRICAL CONNECTIONS 8.1 Electrical connections 8.1.1 Power Supply Cable Connections Wiring Connections 8.2 Protective Features of the Electrically Commutated Fans 8.3 Protective Features of Electrical Heaters 9.0 S 9.1 Initial Startup Checks to Perform after Startup 9.2 Automatic Restart 9.3 Chilled Water Valve: Chilled Water Models 9.4 Adjust Baffles to Direct Air Properly Page 9.5 Remote Rack Sensor Wiring Figure 33 Figure 2T rack sensor 9.5.1 DIP Switch Settings 2T Sensor Table 21 DIP switch settings Back Front View 9.5.2 Set 2T Rack Sensor IdentitiesDIP Switch settings 9.5.3 Terminating the Last 2T Sensor on a Network 9.5.4 Route the CAN bus wire into the cooling unit 321 321 Unterminated Terminated Source DPN001983 rev0 9.5.6 Remote Rack Sensor Operation and Rack View Setup Cold Aisle 10.0 LIEBERT ICOM CONTROL ? ESC 10.1 Navigating Through the Liebert iCOM Menus 10.1.1 Control Interface 10.1.2 Accessing Submenus Accessing Submenus on Large Displays 10.1.3 Entering a Password Page Page Figure 46 User menu icons Table 23 User menu icons C / F % RH SET ! 1234h 1 2 39 6 SET Figure 47 Service menu icons DO Table 24 Service menu icons +/- Table 23 User menu icons (continued) RACK VIEW + / - 10.2 Liebert iCOM Display Readout CRV Liebert 28.02.2011 15:03 SYSTEM ON 28.02.2011 14:07 (01) UNIT ON 28.02.2011 14:07 (01) POWER ON Figure 49 Liebert iCOM menu components for Liebert CRV CRV UNIT 1 F 69.3 Liebert SETPOINTS UNIT 02 10.4 Event Log 10.5 Spare Part List 10.6 WellnessNext Maintenance Calculation 10.6.1 Calculation of Next Maintenance and Diagnostics Calculating Unit Wellness Parameters for Next Maintenance Calculation 10.7 Liebert CRV OperationLiebert iCOM Control 10.7.1 Cooling 10.7.2 Heating 10.7.3 Air Flow 10.7.4 Humidification 10.8 Liebert iCOM User Menu Screens Spare Part List Remote Sens or Supply Sensor Event Log View Network Active Alarms Page Figure 55 Total run hours parameters screen 10.9 Liebert iCOM Service Menu Screens +/- SERVICE MENUS + Page Page Page Unit DiaryLarge Display Only Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Figure 85 Rack Overview, Page 1 Page Page Page Table 27 Service contact info parameters 11.0 OPERATION IN TEAMWORK MODE 11.1 Unit-to-Unit Network Wiring 11.2 Liebert iCOM U2U Ethernet Network 11.3 Wiring a Liebert iCOM U2U Network Wall-Mount Large Display 11.4 Teamwork Modes Liebert iCOM I/O Board Large Graphics Display (Rear View) 11.4.1 Application of Teamwork Modes 11.4.2 No Teamwork 11.4.3 Teamwork Mode 1 11.4.4 Teamwork Mode 2 C1 C2 11.4.5 StandbyRotation Typical Standby (Lead/Lag) Function Standby and Cascade 12.0 O Page 12.1 Alarms/Events 13.0 CALIBRATION AND REGULATION AFTER STARTUP 13.1 Thermostatic Expansion Valve 13.1.1 Determine Suction Superheat 13.1.2 Adjust Superheat Setting with the TEV 13.2 Environmental Protection 14.0 M 14.1 Safety Instructions 14.2 Spare Parts 14.3 Maintenance Schedule 14.4 Inspect and Replace the Air Filter Table 28 Maintenance schedule Page 14.5 Condensate Drain and Condensate Pump Systems 14.5.1 Condensate drain 14.5.2 Condensate Pump, Dual-Float 14.6 Air-Cooled Condenser and Drycoolers 14.7 Electrical Heaters 14.8 Dismantling the Unit 14.9 F-Gas Regulation (EC) No. 842/2006 Page 15.0 T Table 29 Unit diagnostics Table 30 Liebert iCOM medium control board DIPswitch settings APPENDIX A-HUMIDIFIER A.1 PRINCIPAL OF OPERATION A.1.1 Humidifier Water Supply and Plumbing A.1.2 Humidifier Water Connection A.1.3 Humidifier Startup and Operation A.1.4 Low Water Conductivity A.1.5 Cylinder Replacement Remove the Old Cylinder Installing the New Cylinder Cylinder Pin Cylinder Pin Humidifier Maintenance Extended Shutdown A.2 REMOTE RACK SENSOR TROUBLESHOOTING A.3 STARTING POINT Table 31 Humidifier troubleshooting APPENDIX B-ELECTRICAL DATA Table 32 Liebert CRV electrical data - 60Hz (Amps) Table 33 Calibration of electrical components APPENDIX C-ELECTRICAL FIELD CONNECTIONS DESCRIPTIONS C.1 STANDARD ELECTRICAL CONNECTIONS C.2 ELECTRICAL CONNECTIONS FOR OPTIONAL FEATURES Page APPENDIX D-REFRIGERATION AND HYDRAULIC CIRCUITS Figure 105 General arrangementair-cooled units Distributor DPN001984 Rev. 4 Outdoor VFD Condenser Figure 106 General arrangementwater-glycol units Page Page Page Page Ensuring The High Availability Of Mission-Critical Data And Applications.