Page 3 - TABLE OF CONTENTS; CRV C
i TABLE OF CONTENTS 1.0 L IEBERT CRV C OMPONENT L OCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.0 I NTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.1 Product Description ...
Page 4 - ii; COM
ii 9.5 Remote Rack Sensor Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 9.5.1 DIP Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 9.5.2 Set 2T Rack S...
Page 5 - iii; FIGURES
iii 14.3 Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 14.4 Inspect and Replace the Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109 14.5 Condensate Drain and ...
Page 6 - iv
iv Figure 20 Chilled water connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31Figure 21 Chilled water circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Page 8 - TABLES
vi TABLES Table 1 Dry weight, all model types, ± 5% . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 2 Center of gravity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Page 9 - MPORTANT; SAVE THESE INSTRUCTIONS; WARNING
Important Safety Instructions 1 Liebert ® CRV ™ I MPORTANT S AFETY I NSTRUCTIONS 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 a...
Page 10 - from the Liebert CRV.
Important Safety Instructions Liebert ® CRV ™ 2 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...
Page 11 - NOTICE; On and system pump operating.; NOTE; for field installation.
Important Safety Instructions 3 Liebert ® CRV ™ 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...
Page 12 - IEBERT; OMPONENT; Figure 1; Front
Liebert CRV Component Location Liebert ® CRV ™ 4 1.0 L IEBERT CRV C OMPONENT L OCATION Figure 1 Component location, common components—All models Figure 2 Component location - Liebert CR035RA, CR020RA air-cooled units 1 Liebert iCOM ® control display 2 Electric box 3 Evaporator / CW coil 4 Condensate...
Page 13 - Figure 3
Liebert CRV Component Location 5 Liebert ® CRV ™ Figure 3 Component location - Liebert CR035RW, CR020RW water/glycol-cooled units Figure 4 Component location - Liebert CR040RC chilled water units 2 3 1 4 5 6 7 1 Top water/glycol connections 2 Compressor 3 Brazed plate condenser 4 Bottom water/glycol...
Page 14 - Figure 5; Model Type; Rear; Cold Air; Door Fully Open; Top; Ins
Liebert CRV Component Location Liebert ® CRV ™ 6 Figure 5 Overall dimensions / service area Table 1 Dry weight, all model types, ± 5% Model No. Model Type Air Cooled lb (kg) Water/Glycol lb (kg) Chilled Water lb (kg) CR020R 739 (335) 772 (350 — CR035R 805 (365) 849 (385) — CR040R — — 728 (330) Sourc...
Page 15 - NTRODUCTION; Product Description; Figure 6
Introduction 7 Liebert ® CRV ™ 2.0 I NTRODUCTION 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” c...
Page 16 - NSPECTION; Equipment Inspection; use or dispose of it appropriately.; Handling; Figure 7; CAUTION; prepare the unit for installation.
Inspection and Unpacking Liebert ® CRV ™ 8 3.0 I NSPECTION AND U NPACKING 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...
Page 17 - Table 2; Handling the Unit While it is Packaged; Forklift
Inspection and Unpacking 9 Liebert ® CRV ™ • 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: 3.2.1 Handling the Unit While it is Packaged Figure 8 Recommended unit handling equipment • Transpo...
Page 18 - Moving the Unit Using Rigging; are required to move the Liebert CRV to its installation location.; Figure 9; Unpacking the Liebert CRV
Inspection and Unpacking Liebert ® CRV ™ 10 3.3 Moving the Unit Using Rigging 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...
Page 19 - Figure 10 Unpacking the Liebert CRV; Removing the Unit from the Skid; Open the top panel door with the mounted control (refer to
Inspection and Unpacking 11 Liebert ® CRV ™ Figure 10 Unpacking the Liebert CRV 3.5 Removing the Unit from the Skid 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 baff...
Page 20 - Figure 11 Removing the unit from the skid; Reattach the Baffle Panel
Inspection and Unpacking Liebert ® CRV ™ 12 Figure 11 Removing the unit from the skid 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 ...
Page 21 - REPARE; CRV; FOR; Torx Bit to prepare for installation.; Figure 12 Adjust leveling feet
Prepare the Liebert CRV for Installation 13 Liebert ® CRV ™ 4.0 P REPARE THE L IEBERT CRV FOR I NSTALLATION 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 docume...
Page 22 - IPING; parallel to the airflow.; Fluid Connections
Piping Liebert ® CRV ™ 14 5.0 P IPING 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...
Page 23 - Gravity Drain—Units Without Factory-Installed Condensate Pump; without; Figure 13 Gravity drain; Condensate Pump; with; Humidifier Supply Water—Optional Steam Generating Canister; CORRECT; INCORRECT
Piping 15 Liebert ® CRV ™ 5.1.1 Condensate Piping—Field-Installed • 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 installi...
Page 24 - Requirements of Systems Using Water or Glycol; ing, fluid chemistry and fluid maintenance.
Piping Liebert ® CRV ™ 16 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 ...
Page 25 - Leak Checking of Unit and Field Piping
Piping 17 Liebert ® CRV ™ 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-...
Page 26 - EFRIGERANT; matter back to the compressor.
Refrigerant Connections Liebert ® CRV ™ 18 6.0 R EFRIGERANT C ONNECTIONS 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...
Page 27 - Piping Guidelines—Air-Cooled Units; piping is in place, ready for connection to the unit and condenser; Tables 7; through; Table 6; Refrigerant Piping—Air-Cooled Models; Figure 14 Top refrigerant piping connections; If using bottom
Refrigerant Connections 19 Liebert ® CRV ™ 6.1 Piping Guidelines—Air-Cooled Units • 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 j...
Page 29 - Figure 16 Pipeline air conditioner - condenser; and; Table 7
Refrigerant Connections 21 Liebert ® CRV ™ Figure 16 Pipeline air conditioner - 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 Li...
Page 30 - Table 9; Entering Hot Gas
Refrigerant Connections Liebert ® CRV ™ 22 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) TCS...
Page 31 - Steps a
Refrigerant Connections 23 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 becau...
Page 32 - Figure 17 Connections—air-cooled models; RG; Top Connections; HS
Refrigerant Connections Liebert ® CRV ™ 24 Figure 17 Connections—air-cooled models LVT LVT RG RL RL GD or CP RG 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 Connec...
Page 33 - Unit Connections
Refrigerant Connections 25 Liebert ® CRV ™ Table 11 Unit connections, air-cooled models Unit Connections CR20A (50Hz) CR35A (50Hz) CR20A (60Hz) CR35A (60Hz) RL Refrigerant Liquid Line Inlet 12mm O.D. Cu Sweat 16mm O.D. Cu Sweat 1/2" O.D. Cu Sweat 5/8" O.D. Cu Sweat RG Refrigerant Gas Line Ou...
Page 34 - Vacuum and Refrigerant Charge; refrigerating compressor.; R-410A refrigerant and oil charge for air-cooled models; Air-cooled condenser refrigerant charge
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...
Page 35 - Variable Fan Speed Control Leak Check and Evacuation Procedure; Variable Fan Speed Charging on page 28; Suction and Supply Line Connections
Refrigerant Connections 27 Liebert ® CRV ™ 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 Proper leak check and evacuation can be accomplished only with all system solenoid valves open...
Page 36 - Variable Fan Speed Charging; charge data in; the diagnostic section of the Liebert iCOM
Refrigerant Connections Liebert ® CRV ™ 28 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 ...
Page 37 - ATER; Water Connections—Supply Humidifier and Drain Water, All Models; Figure 19 Water connection points, bottom entry; • Condensate drain without pump:; Appendix A - Humidifier
Water Connections 29 Liebert ® CRV ™ 7.0 W ATER C ONNECTIONS 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 poi...
Page 38 - Glycol Mixture; Appendix D - Refrigeration and Hydraulic Circuits; by Volume
Water Connections Liebert ® CRV ™ 30 7.2 Glycol Mixture Add ethylene glycol or propylene glycol to the circuit in the percentages shown in Table 18 . 7.3 Water Connections: Water/Glycol-Cooled Models The unit must receive cooling water as follows: • From an external cooling water source, in open cir...
Page 39 - Chilled Water Connections: Chilled Water Units; Figure 20 Chilled water connections; Refer to; Figure 21 Chilled water circuit; Tubing Support; Liebert CRV
Water Connections 31 Liebert ® CRV ™ 7.4 Chilled Water Connections: Chilled Water Units 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 b...
Page 40 - Figure 22 Air bleeding valve position CW; REAR VIEW
Water Connections Liebert ® CRV ™ 32 Figure 22 Air bleeding valve position CW REAR VIEW
Page 41 - Figure 23 Connections—water/glycol models; Bottom Connections
Water Connections 33 Liebert ® CRV ™ Figure 23 Connections—water/glycol models HVT LVT LVT HS CP CR CS GDH or HS CR Piping and electricalconnections available atthe top and bottom of unit. * Install a 35 mesh strainer, in an easily accessible location, on the Water/Glycol Supply to prevent particles...
Page 43 - Figure 24 Connections—chilled water models
Water Connections 35 Liebert ® CRV ™ Figure 24 Connections—chilled water models Piping and electrical connections availableat the top and bottomof the unit. TOP CONNECTIONS BOTTOM CONNECTIONS(possible with raised floor) REAR LVT LVT HVT LVB LVB2 GDH or HS CWR CWR CWS CWS HS CP GD or CP 46-1/4" (...
Page 44 - Figure 25 Recommended drycooler Installation
Water Connections Liebert ® CRV ™ 36 Figure 25 Recommended drycooler Installation 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 D...
Page 45 - LECTRICAL; Electrical connections; Figure 26 Remove electrical panel and lower front panel
Electrical Connections 37 Liebert ® CRV ™ 8.0 E LECTRICAL C ONNECTIONS 8.1 Electrical connections Figure 26 Remove electrical panel and lower front panel ! WARNING Arc flash and electric shock hazard. Can cause injury and death.Disconnect local and remote power supplies and wear appropriate personal...
Page 46 - Figure 27 Power and control cable entry points and routing; Before proceeding with the electrical connections, ensure that:; Wiring Connections; Appendix B - Electrical Data
Electrical Connections Liebert ® CRV ™ 38 Figure 27 Power and control cable entry points and routing 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...
Page 47 - Protective Features of the Electrically Commutated Fans; The EC fans are protected against:; Protective Features of Electrical Heaters; Temperature
Electrical Connections 39 Liebert ® CRV ™ 8.2 Protective Features of the Electrically Commutated Fans 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...
Page 48 - TARTUP; Initial Startup; Ensure that the refrigerant charge is correct (see; fan blades have stopped before working on the unit.
Startup Liebert ® CRV ™ 40 9.0 S TARTUP 9.1 Initial Startup 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 va...
Page 49 - Checks to Perform after Startup; calibrated correctly, and that it controls the fan operation.; Automatic Restart; before restarting the unit.; Figure 29 Refrigerant line components
Startup 41 Liebert ® CRV ™ Checks to Perform after Startup 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) an...
Page 50 - Chilled Water Valve: Chilled Water Models; Figure 4; bulletins are enclosed with documentation onboard the unit.; Adjust Baffles to Direct Air Properly; any work on the unit.
Startup Liebert ® CRV ™ 42 9.3 Chilled Water Valve: Chilled Water Models 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., ...
Page 51 - . Remove the screws and; Figure 31 Adjust the baffles to ensure correct airflow direction; display door, or it can be removed to discharge air left and right.
Startup 43 Liebert ® CRV ™ To adjust the baffles: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 r...
Page 52 - Figure 32 Adjust air-blocking plate; Remote Rack Sensor Wiring; Ethernet network to leverage all of the Liebert iCOM; Wiring a Liebert; or as a reference sensor.; FRONT VIEW
Startup Liebert ® CRV ™ 44 Figure 32 Adjust air-blocking plate 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. 9.5 Remote Rack Sensor Wiring The...
Page 53 - Figure 33 Figure 2T rack sensor; T Rack Sensor; T Sensor
Startup 45 Liebert ® CRV ™ Figure 33 Figure 2T rack sensor 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 ...
Page 54 - Set 2T Rack Sensor Identities—DIP Switch settings; Figure 35 Setting 2T Sensor DIP Switches; Terminating the Last 2T Sensor on a Network; Note
Startup Liebert ® CRV ™ 46 9.5.2 Set 2T Rack Sensor Identities—DIP Switch settings 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 sens...
Page 55 - Figure 36 Termination jumper setting; Route the CAN bus wire into the cooling unit; it is recommended that you hire a certified electrician.; Unterminated; Termination Jumper; Inside of Display Door
Startup 47 Liebert ® CRV ™ Figure 36 Termination jumper setting 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 ...
Page 56 - Figure 37 2T rack sensors installed on neighboring racks; T SENSOR CHAIN
Startup Liebert ® CRV ™ 48 9.5.5 Installing 2T sensors on racks 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 ...
Page 57 - Located in the Service / Rack Setup Menu of the Liebert iCOM; Remote Rack Sensor Operation and Rack View Setup; Figure 38 Rack setup screen, page 1 of 3
Startup 49 Liebert ® CRV ™ Located in the Service / Rack Setup Menu of the Liebert iCOM ® display, the sensors can be set up to 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 Se...
Page 58 - Figure 40 Rack setup screen, page 3 of 3; value up to four positions.; Figure 41 Rack overview screen; sensor is currently measuring.; All temperatures shown in °F
Startup Liebert ® CRV ™ 50 Figure 40 Rack setup screen, page 3 of 3 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....
Page 59 - ONTROL; Keyboard icons and functions; Icon; ESC
Liebert iCOM ® Control 51 Liebert ® CRV ™ 10.0 L IEBERT I COM ® C ONTROL 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 te...
Page 60 - Figure 42 Liebert iCOM; Navigating Through the Liebert iCOM Menus; or Advanced menus, press the right arrow key.; Accessing Submenus on Large Displays; Entering a Password on page 53
Liebert iCOM ® Control Liebert ® CRV ™ 52 Figure 42 Liebert iCOM ® default screen symbols 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 sho...
Page 61 - Password; Figure 43 Entering a password; changes can then be made to parameters in either level.; SETPOINTS; to change parameter; Relative
Liebert iCOM ® Control 53 Liebert ® CRV ™ change the unit being viewed. Pressing the ESC key will go back a level. Figures 44 and 45 show the Liebert iCOM ® control menus for a stand-alone large display and for a networked large display, respectively. 10.1.3 Entering a Password To change the value o...
Page 62 - Figure 44 Menu tree—Large display, stand-alone
Liebert iCOM ® Control Liebert ® CRV ™ 54 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 AlarmsDisplay Setup Total Run Hours Sleep Mode ...
Page 63 - Viewing Multiple Units with a Networked Large Display; word; Figure 45 Menu tree—Large display, networked; System
Liebert iCOM ® Control 55 Liebert ® CRV ™ 10.1.4 Viewing Multiple Units with a Networked Large Display 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...
Page 64 - Figure 46 User menu icons; User Menu; SET; EVENT; SET
Liebert iCOM ® Control Liebert ® CRV ™ 56 Figure 46 User menu icons Table 23 User menu icons Icon Name Description Setpoints View and change temperature and humidity setpoints Spare Part List Displays the various part numbers of the components/parts in the cooling unit Event Log Contains last 400 ev...
Page 65 - Figure 47 Service menu icons; RACK; DO; SERVICE
Liebert iCOM ® Control 57 Liebert ® CRV ™ Figure 47 Service menu icons Rack View Allows viewing data, collected by sensors, about rack status Service Contact Info Contains key contact information for local service, including names and phone numbers iCOM-DO Change settings for Liebert iCOM ® Discrete...
Page 67 - Display Readout; remote rack sensors are connected.; Figure 48 Liebert CRV system screen; average, maximum and minimum of all connected sensors.; SYSTEM; Liebert; SYSTEM ON
Liebert iCOM ® Control 59 Liebert ® CRV ™ 10.2 Liebert iCOM ® Display Readout 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 ope...
Page 68 - Figure 49 Liebert iCOM; UNIT ON; UNIT ON
Liebert iCOM ® Control Liebert ® CRV ™ 60 Figure 49 Liebert iCOM ® menu components for Liebert CRV UNIT 1 Liebert CRV Rack Inlet TempAverage : 71°F Maximum: 73°FMinimum: 69°F 28.02.2011 15:03 UNIT ON 28.02.2011 14:07 (01) UNIT ON28.02.2011 14:07 (01) POWER ON p r e s s : f o r n e x t/ p r e v u n i...
Page 69 - Control Setup; for other applications shown in; Figure 50 Setpoint screen; In; Supply
Liebert iCOM ® Control 61 Liebert ® CRV ™ 10.3 Liebert iCOM ® Control Setup 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 coolin...
Page 70 - panels, server population and if containment is being used; Wellness—Next Maintenance Calculation; Calculation of Next Maintenance and Diagnostics; Controlling sensor settings; Cooling Control
Liebert iCOM ® Control Liebert ® CRV ™ 62 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 ...
Page 71 - Calculating Unit Wellness
Liebert iCOM ® Control 63 Liebert ® CRV ™ 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 call...
Page 72 - Liebert CRV Operation—Liebert iCOM; will deactivate when the temperature setpoint has been reached.
Liebert iCOM ® Control Liebert ® CRV ™ 64 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 ...
Page 73 - User Menu Screens; Check; Figure 51 User menu icons; unit will maintain by applying cooling and or reheats.; Humidity Setpoint; maintain by removing or adding moisture to the air.; Spare Part List; Spare Parts; Event Log; for next/previous unit
Liebert iCOM ® Control 65 Liebert ® CRV ™ 10.8 Liebert iCOM ® User Menu Screens 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 wi...
Page 74 - View Network; Figure 53 Sensor data parameters screen; Active Alarms
Liebert iCOM ® Control Liebert ® CRV ™ 66 View Network 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...
Page 75 - Figure 54 Display setup parameters screen; menu parameters will be converted to the selected language.
Liebert iCOM ® Control 67 Liebert ® CRV ™ Figure 54 Display setup parameters screen Language —This parameter sets the language on the display. When this parameter is changed all menu parameters will be converted to the selected language. Date —This parameter sets the internal date of the unit. If th...
Page 76 - Figure 55 Total run hours parameters screen; component can operate before the next maintenance.; Service Menu Screens; parameters is; Figure 56 Service Menu Main Screen; SERVICE MENUS; to select parameter; to unselect
Liebert iCOM ® Control Liebert ® CRV ™ 68 Figure 55 Total run hours parameters screen Each parameter shows the actual hours the component has operated and the maximum time the component can operate before the next maintenance. 10.9 Liebert iCOM ® Service Menu Screens Service menus allow customized s...
Page 77 - Figure 57 Setpoints parameters screen - Page 1; —This parameter selects the type of control the system will use to
Liebert iCOM ® Control 69 Liebert ® CRV ™ Figure 57 Setpoints parameters screen - Page 1 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...
Page 78 - Figure 58 Setpoints parameters screen - Page 2
Liebert iCOM ® Control Liebert ® CRV ™ 70 Figure 58 Setpoints parameters screen - Page 2 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...
Page 79 - Figure 59 Setpoints parameters screen - Page 3
Liebert iCOM ® Control 71 Liebert ® CRV ™ Figure 59 Setpoints parameters screen - Page 3 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 ...
Page 80 - Figure 60 Setpoints parameters screen - Page 4; reached faster when compared to the calculated call for fan.; Unit Diary—Large Display Only; situations, such as high temperature and a single fan failure.; Unit diary parameters; Function; Text entered with iST
Liebert iCOM ® Control Liebert ® CRV ™ 72 Figure 60 Setpoints parameters screen - Page 4 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 spee...
Page 81 - Figure 61 Standby settings / lead-lag parameters screen; PASSW ORD
Liebert iCOM ® Control 73 Liebert ® CRV ™ Figure 61 Standby settings / lead-lag parameters screen 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. Rotation Frequency —...
Page 82 - Figure 62 Wellness basic settings screen- Page 1
Liebert iCOM ® Control Liebert ® CRV ™ 74 Figure 62 Wellness basic settings screen- Page 1 Maintenance Frequency Per Year —This parameter sets the number of expected maintenance visits in a one year time span. Max Bonus —This parameter will increase the time to the next maintenance cycle. A bonus sh...
Page 83 - Figure 63 Wellness motor settings parameters screen - Page 2; —This parameter shows the number of starts for the unit’s fans.
Liebert iCOM ® Control 75 Liebert ® CRV ™ Figure 63 Wellness motor settings parameters screen - Page 2 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 display...
Page 84 - occurred with the unit’s compressor.
Liebert iCOM ® Control Liebert ® CRV ™ 76 Figure 64 Wellness compressor 1 settings parameters screen - Page 3 Number of Starts —This parameter shows the number of starts for the unit’s compressor. Run Hours —This parameter shows the number of run hours for the unit’s compressor. Average Run Time —Th...
Page 85 - —This parameter shows the number of starts for the unit’s reheats.; Screen displayed
Liebert iCOM ® Control 77 Liebert ® CRV ™ Figure 65 Wellness electric heater 1 settings parameters screen - Page 4 Number of Starts —This parameter shows the number of starts for the unit’s reheats. Run Hours —This parameter shows the number of run hours for the unit’s reheats. Average Run Time —Thi...
Page 86 - Figure 66 Wellness humidifier settings parameters screen - Page 5; occurred with the unit’s humidifier.
Liebert iCOM ® Control Liebert ® CRV ™ 78 Figure 66 Wellness humidifier settings parameters screen - Page 5 Number of Starts —This parameter shows the number of starts for the unit’s humidifier. Run Hours —This parameter shows the number of run hours for the unit’s humidifier. Average Run Time —This...
Page 87 - Figure 67 Diagnostics / service mode parameters screen - Page 1; —Compressor 1 high pressure alarm code.; LP 1 Alarm Code; this refer to the Liebert iCOM; HT 1 Alarm Counter; —Current refrigerant low pressure side reading in atmosphere for; Actual HP1 Pressure
Liebert iCOM ® Control 79 Liebert ® CRV ™ Figure 67 Diagnostics / service mode parameters screen - Page 1 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 ® Training and...
Page 88 - Figure 68 Diagnostics / service mode parameters screen - Page 2
Liebert iCOM ® Control Liebert ® CRV ™ 80 Figure 68 Diagnostics / service mode parameters screen - Page 2 Manual Mode —Use this setting to place the Liebert iCOM ® control in manual mode. This is the initial setting necessary to activate any of the following items. Motor(s) —Setting this option to O...
Page 89 - Figure 70 Diagnostics / service mode parameters screen - Page 4
Liebert iCOM ® Control 81 Liebert ® CRV ™ Humidifier Fill —This activates just the humidifier water source solenoid valve which fills the humidifier pan or canister with water. Humidifier —This activates the humidifier system in its entirety. Humidifier Drain —This activates just the humidifier drai...
Page 90 - Figure 71 Diagnostics / service mode parameters screen - Page 5
Liebert iCOM ® Control Liebert ® CRV ™ 82 Figure 71 Diagnostics / service mode parameters screen - Page 5 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. Status Filter —This shows the ...
Page 91 - Figure 73 Set alarms parameters screen - Page 1; an alarm on the Liebert iCOM
Liebert iCOM ® Control 83 Liebert ® CRV ™ Figure 73 Set alarms parameters screen - Page 1 Temp/Hum Events —This parameter enables or disables all of the temperature and humidity events. High Supply Temperature —This parameter sets the high temperature threshold that will trigger an alarm on the Lieb...
Page 92 - Figure 74 Set alarms parameters screen - Page 2
Liebert iCOM ® Control Liebert ® CRV ™ 84 Figure 74 Set alarms parameters screen - Page 2 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...
Page 93 - Figure 76 Set alarms parameters screen - Page 4; the red LED on the display
Liebert iCOM ® Control 85 Liebert ® CRV ™ Figure 76 Set alarms parameters screen - Page 4 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 th...
Page 94 - Figure 77 Sensor calibration / setup parameters - Page 1; —This parameter shows the adjusted temperature value of the; Figure 78 Sensor calibration / setup parameters - Page 2
Liebert iCOM ® Control Liebert ® CRV ™ 86 Figure 77 Sensor calibration / setup parameters - Page 1 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. Calibrated Return Tempe...
Page 95 - Figure 79 Sensor calibration / setup parameters - Page 3
Liebert iCOM ® Control 87 Liebert ® CRV ™ Return T Sensor PTC or NTC —This parameter selects the type of sensor being used for the return 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...
Page 96 - Figure 80 Sensor calibration / setup parameters - Page 4
Liebert iCOM ® Control Liebert ® CRV ™ 88 Figure 80 Sensor calibration / setup parameters - Page 4 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 calibr...
Page 97 - Liebert iCOM
Liebert iCOM ® Control 89 Liebert ® CRV ™ Network Safe —This parameter saves or loads network 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 settin...
Page 98 - Figure 83 System/Network setup parameters Unit- Page 1; —This parameter sets the address used by the Liebert IntelliSlot
Liebert iCOM ® Control Liebert ® CRV ™ 90 Figure 83 System/Network setup parameters Unit- Page 1 Monitoring Address —This parameter sets the address used by the Liebert IntelliSlot ® cards. This is set to 3 from the factory and should not be changed. Monitoring Timeout/Handshake —This parameter can ...
Page 99 - Figure 84 System/Network setup parameters Unit - Page 2; housing. iGMNet will activate
Liebert iCOM ® Control 91 Liebert ® CRV ™ Figure 84 System/Network setup parameters Unit - Page 2 Monitoring Protocol —This parameter selects the monitoring protocol. Velocity V3 is the factory default which will provide communications to the Liebert IntelliSlot ® housing. iGMNet will activate the 7...
Page 100 - Figure 85 Rack Overview, Page 1; —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.
Liebert iCOM ® Control Liebert ® CRV ™ 92 Figure 85 Rack Overview, Page 1 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. Figure 86 Rack Setup, Page 1 Rac...
Page 101 - Figure 87 Rack Setup, Page 2; first group of six “boxes.”
Liebert iCOM ® Control 93 Liebert ® CRV ™ Figure 87 Rack Setup, Page 2 The Rack Setup display allows creating a graphical map of the remote rack sensors.When the Assigned Sensors 1-6 are selected, it will drop the user down to assign the sensor node address to the first group of six “boxes.” Setting...
Page 102 - Figure 89 Options setup parameters - Page 1; —This parameter sets the amount of time that the unit will ignore a; Electric Stages; the factory based on the valves manufacturer specifications.; P Actuator Direction; parameters must be adjusted:
Liebert iCOM ® Control Liebert ® CRV ™ 94 Figure 89 Options setup parameters - Page 1 Low Pressure Alarm Delay —This parameter sets the amount of time that the unit will ignore a low pressure condition. In the past this parameter has also been referred to as a Winter Start Time. This parameter can b...
Page 103 - Figure 90 Options setup parameters - Page 2; to dehumidify when the humidity is above setpoint.; Auto Restart Enabled; configuration is “On”.
Liebert iCOM ® Control 95 Liebert ® CRV ™ Figure 90 Options setup parameters - Page 2 WA and AL Relay — Dehumidification Enabled —This parameters selects if the compressor and / or valve will be used to dehumidify when the humidity is above setpoint. Auto Restart Enabled —This parameter when set to ...
Page 104 - Service contact info parameters
Liebert iCOM ® Control Liebert ® CRV ™ 96 Table 27 Service contact info parameters Function Range Imperial (metric) Large Display Small Display Page 1 of 1 Password PASSWORD - Country Country None Austria Switzerland D Switzerland F Benelux D Benelux FL Germany France UK Hungary Italy Poland Spain U...
Page 105 - PERATION; Cascade; the temperature setpoint.; Teamwork Modes 1 and 2; help manage the large amount of sensor information Liebert iCOM; Liebert iCOM U2U Ethernet Network; technical issues contact:; [email protected]
Operation in Teamwork Mode 97 Liebert ® CRV ™ 11.0 O PERATION IN T EAMWORK M ODE 11.1 Unit-to-Unit Network Wiring Liebert CRV’s can be connected in a unit-to-unit, or U2U, configuration, which allows multiple units to communicate with each other, sharing of local unit status and sensor readings. The...
Page 106 - Wiring a Liebert iCOM; cable connects to the P64 port on the back of the large display (see; Figure 91 U2U network setup diagram; Network
Operation in Teamwork Mode Liebert ® CRV ™ 98 11.3 Wiring a Liebert iCOM ® U2U Network A network switch is required to enable Ethernet unit-to-unit communication on one or more Liebert CRV’s. Each Liebert CRV requires two straight-through Ethernet cables from a network switch. One cable connects to ...
Page 107 - Wall-Mount Large Display; Figure 92 Wiring a large display for U2U network operation; See Note 4; Large Graphics Display
Operation in Teamwork Mode 99 Liebert ® CRV ™ Wall-Mount Large Display The Liebert CRV has a large display as standard equipment. Only large displays can be used for remotely monitoring and controlling cooling units connected on the same network. Each wall-mount large display requires 120V input pow...
Page 108 - Figure 93 Teamwork modes and sensor management; : Multiple zones in one room; Teamwork Mode 1; : Balanced load (small groups of units inside the same environment); Teamwork Mode 2; well for most applications); Standby and Cascade on; ). AutoSet will not adjust the proportional band in this mode.
Operation in Teamwork Mode Liebert ® CRV ™ 100 Figure 93 Teamwork modes and sensor management 11.4.1 Application of Teamwork Modes • No Teamwork : Multiple zones in one room • Teamwork Mode 1 : Balanced load (small groups of units inside the same environment) • Teamwork Mode 2 : Unbalanced load (lar...
Page 109 - Figure 94 Teamwork Mode 1 with two cooling units; not adjust the proportional band in this mode.; deadband and related settings may differ.
Operation in Teamwork Mode 101 Liebert ® CRV ™ Figure 94 shows how two cooling units work together in Teamwork Mode 1. Since Unit 1 and Unit 2 are available to operate, the master unit, Unit 1, averages the temperature and humidity sensor readings from each unit.The master unit determines that a 60%...
Page 110 - configuration, when the rotation parameter is set to 2.; Standby and Cascade; respond to the request after its control delay.
Operation in Teamwork Mode Liebert ® CRV ™ 102 11.4.5 Standby—Rotation Typical Standby (Lead/Lag) Function This function can be performed in any teamwork mode, including NO Teamwork.One or more units can be defined to be Standby; the normal status of standby units is Standby Off (fan off).In case on...
Page 111 - Cooling; dehumidification to allow the room temperature to stabilize.
Operation 103 Liebert ® CRV ™ 12.0 O PERATION Figure 95 Return air temperature and humidity sensor viewed from the rear of the unit The control system compares the relayed information with the programmed setpoint and proportional band values and performs one of the following operations: • Cooling —D...
Page 112 - Humidification; stream via the steam distribution pipe. (See also; Example; The Liebert iCOM
Operation Liebert ® CRV ™ 104 • Humidification (optional)—The humidifier creates steam, which is distributed into the air stream via the steam distribution pipe. (See also Appendix A - Humidifier ). The Liebert CRV’s humidification is activated when the measured temperature and humidity sensor has b...
Page 113 - The following alarms and events are supported by the Liebert iCOM
Operation 105 Liebert ® CRV ™ 12.1 Alarms/Events The following alarms and events are supported by the Liebert iCOM ® control on the Liebert CRV. When an alarm is triggered the alarm sounds, the LED will flash red, an event will be written to the Event Log and the BMS will be notified. If the alarm i...
Page 114 - ALIBRATION; ual for the equipment.; Thermostatic Expansion Valve; Adjust Superheat Setting with the TEV; Environmental Protection; economic and environmental damage.; for the new balance to take place.
Calibration and Regulation after Startup Liebert ® CRV ™ 106 13.0 C ALIBRATION AND R EGULATION AFTER S TARTUP The Liebert CRV has been factory-tested and calibrated, but it is very important to check, at startup, the superheating of the thermostatic valve (A/W versions). • For calibrations of instru...
Page 115 - AINTENANCE; Safety Instructions; ensure they are not receiving electrical input power.
Maintenance 107 Liebert ® CRV ™ 14.0 M AINTENANCE 14.1 Safety Instructions All maintenance operations must strictly observe national, state and local accident prevention regulations, especially the regulations concerning electrical systems, refrigerators and manufacturing resources.Air conditioning ...
Page 116 - Maintenance Schedule; an inspection report.
Maintenance Liebert ® CRV ™ 108 14.2 Spare Parts Only original spare parts made by Emerson Network Power may be used. Using third-party material can invalidate the warranty. When making seeking technical assistance, always refer to the component list supplied with the equipment, and specify the mode...
Page 117 - Inspect and Replace the Air Filter; cuts the input power see; Figure 96 Air filter location and input power safety switch
Maintenance 109 Liebert ® CRV ™ 14.4 Inspect and Replace the Air Filter Check the air filter monthly to maintain efficient air distribution through the evaporator coil.1. Switch Off the CRV.2. Open the rear panel by rotating the three locks with a screwdriver.3. Wait until the fans stop rotating. Wh...
Page 118 - To extract the filters (refer to; Figure 97 Remove the air filters; drain trays are clean and the pipe secure.; Figure 98 Differential pressure switch tubes; remains in safety status.
Maintenance Liebert ® CRV ™ 110 To extract the filters (refer to Figure 97 : 1. Push up the upper filter.2. Pull the bottom of the filter away from the Liebert CRV.3. Pull it out of the unit.4. Lift the lower filter up5. Pull the bottom of the filter away from the Liebert CRV.6. Pull it out of the u...
Page 119 - Condensate Drain and Condensate Pump Systems; Figure 99 Condensate pump; Electrical Heaters
Maintenance 111 Liebert ® CRV ™ 14.5 Condensate Drain and Condensate Pump Systems 14.5.1 Condensate drain Check for and clear obstructions in tubing during routine maintenance. 14.5.2 Condensate Pump, Dual-Float Figure 99 Condensate pump 1. Disconnect power to the unit using the disconnect switch.2....
Page 120 - Dismantling the Unit; containing hazardous substances.; Refrigerant Connections; maintenance activities in a dedicated log book.
Maintenance Liebert ® CRV ™ 112 14.8 Dismantling the Unit The Liebert CRV has been designed and built to ensure continuous operation.The working life of some of the main components, such as the fan and the compressor, depends on proper maintenance. NOTICE Risk of release of hazardous substances into...
Page 121 - ing operation at the installation site.
Maintenance 113 Liebert ® CRV ™ • Additional information located in a dedicated label of the unit (Reg. 1494/2007): a. Where fluorinated greenhouse gas is foreseen to be added to the equipment outside of the manufacturing site at the point of installation, a dedicated label accommodates notation of ...
Page 122 - ROUBLESHOOTING; Unit diagnostics; Problem
Troubleshooting Liebert ® CRV ™ 114 15.0 T ROUBLESHOOTING Table 29 Unit diagnostics Problem Possible Cause Corrective Action Rack temperature is too high Dirty filters Replace filters Filter clog sensor failure Call Emerson Network Power Incorrect positioning of remote temperature sensor(s) Verify t...
Page 123 - DIPswitch
Troubleshooting 115 Liebert ® CRV ™ Table 30 Liebert iCOM ® medium control board DIPswitch settings DIPswitch Number Compressorized CRV models CR020 and CR035 Chilled Water Model-CR040 1 On Off 2 Off Off 3 On Off 4 Off Off 5 Off Off 6 Off Off 7 Off On 8 On On
Page 124 - PPENDIX; RINCIPAL; When the Liebert iCOM; Figure 100 General diagram—humidifier operation
Humidifier Liebert ® CRV ™ 116 A PPENDIX A - H UMIDIFIER A.1 P RINCIPAL OF O PERATION When the Liebert iCOM ® calls, the cylinder fills to 100% of the Full Load Amperage (FLA) or to the top of the cylinder, whichever comes first. See Figure 100 . If it reaches 100% FLA, the water heats and boils awa...
Page 125 - A.1.1 Humidifier Water Supply and Plumbing; Figure 101 Water connection to humidifier
Humidifier 117 Liebert ® CRV ™ A.1.1 Humidifier Water Supply and Plumbing The fill valve is sized for an extended water pressure range of 30 to 80 psi.For installations where water pressure is less than 15 psi, add a pressure boost pump and notify the factory; a fill valve with an oversized opening ...
Page 127 - Remove the Old Cylinder; The cylinder is now ready to be lifted out of the unit.; Installing the New Cylinder; and new cylinder plugs must be ordered.; Figure 102 Sensor pins, cylinder plugs; Humidifier Maintenance; Cylinder Pin
Humidifier 119 Liebert ® CRV ™ Remove the Old Cylinder 1. Turn Off the water supply to the unit.2. The old cylinder must be drained completely before removing. This is done by pushing the auto On/Off/Drain switch to the “drain” position. 3. When the cylinder is empty, push the auto On/Off/Drain swit...
Page 128 - Terms Used; are amps listed on the humidifier specification label.; Short cycling; required to maintain output.; Foaming; level of the foam approaches the top of the cylinder.; Back pressure; the LED (DS1) located on the sensor circuit board will be solid green.; Figure 103 CAN bus and Ethernet cable wiring
Humidifier Liebert ® CRV ™ 120 A.1.6 Humidifier Troubleshooting Terms Used • FLA (Full Load Amps) are amps listed on the humidifier specification label. • Short cycling occurs when the humidifier’s “On time” is less than 10 minutes upon a call for humidity. To correct short cycling, all humidifiers ...
Page 129 - TARTING; then inspect the following while referring to the wiring diagram:
Humidifier 121 Liebert ® CRV ™ A.3 S TARTING P OINT Auto On/Off/Drain switch in On position—unit will not fill:When the On/Off control circuit is made and the Auto On/Off/Drain switch is pushed to On, the 24V holding coil of the primary contactor should energize. The resulting magnetic pull closes t...
Page 130 - Humidifier troubleshooting; Unit Status Lamp
Humidifier Liebert ® CRV ™ 122 Table 31 Humidifier troubleshooting Unit Status Lamp Symptom Corrective actions Yellow Green On On Maximum water level inside cylinder. This usually happens on initial start-up after replacing the cylinder (normal). Water is concentrated with minerals inside the cylind...
Page 131 - grounded center tap will exceed the 300V line-to-ground limit.; Calibration of electrical components
Electrical Data 123 Liebert ® CRV ™ A PPENDIX B - E LECTRICAL D ATA NOTICE Risk of exceeding line-to-ground limit. Can cause equipment damage.The electrically commutated (EC) motors included in 480V CR035 and CR040 units are suitable for connection to power supplies with 300V or less line to ground ...
Page 132 - overcurrent protective device size.
Electrical Field Connections Descriptions Liebert ® CRV ™ 124 A PPENDIX C - E LECTRICAL F IELD C ONNECTIONS D ESCRIPTIONS C.1 S TANDARD E LECTRICAL C ONNECTIONS (Source: DPN001884, Rev. 4, Page 1)1. High Voltage Connection Through the Bottom of the Electric Panel —1-3/8" (34.9mm), 1-3/4" (44...
Page 133 - Figure 104 Electrical field connections; Refer to C.1 Standard Electrical Connections and
Electrical Field Connections Descriptions 125 Liebert ® CRV ™ NOTICE Risk of improper input power. Can cause equipment damage.The electronically commutated motors included in the Liebert CRV unit are suitable for connection to an electrical service providing input power to the unit with 300V or less...
Page 134 - Figure 105 General arrangement—air-cooled units; Distributor; Outdoor VFD Condenser; Outdoor Lee-Temp Condenser
Refrigeration and Hydraulic Circuits Liebert ® CRV ™ 126 A PPENDIX D - R EFRIGERATION AND H YDRAULIC C IRCUITS Figure 105 General arrangement—air-cooled units Distributor + + Suction Line DPN001984Rev. 4 Factory Refrigerant PipingField Piping Outdoor VFD Condenser VibrationAbsorber Vibration Absorbe...
Page 135 - Figure 106 General arrangement—water-glycol units
Refrigeration and Hydraulic Circuits 127 Liebert ® CRV ™ Figure 106 General arrangement—water-glycol units Check Valve AB B A A AB B NOTES1. Schematic representation shown. Do not use for specific connection locations.2. Install a 35 mesh straine r, in an easily accessible location, on the water/gly...
Page 136 - Figure 107 General arrangement—chilled water
Refrigeration and Hydraulic Circuits Liebert ® CRV ™ 128 Figure 107 General arrangement—chilled water B AB A A AB B DPN001986Rev. 1 NOTE: Schematic representation shown. Do not use for specific connection locations. Factory Refrigerant Piping 3-Way Chilled WaterValve Configuration Air Bleed Valve 2-...
Page 137 - NOTES
Refrigeration and Hydraulic Circuits 129 Liebert ® CRV ™ NOTES
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