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

Precision Cooling For Bu siness-Criti cal C ontinuity™ Li eb er t ® CRV ™ Us er Manu al–60Hz, 24-Inc h Wide , Air -C ooled, W at er/G lycol-C ooled and C hilled W ate r[...]

M ODEL N UMBER N OMENCLATURE - 25 D IGIT C ONFIGURATION N UMBE R Model # Part 1 * Model Details Model # Part 2 * 1234567891 01 11 21 31 41 51 61 71 81 92 02 12 22 32 42 5 CR0 2 0 RA 1 C 7 S D 1 8 1 1 E L 1 0 P A * * * Digits 1-2 - Unit Family Digit 17 - High-Voltage Options Liebert ® CRV ™ = CR L or A = NO dual-float condens ate pump (for units [...]

i T ABLE OF CONTENTS 1.0 L IEBERT CR V C OMPONENT L OCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.0 I NTRODUCTI ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.1 Product Description . . . . . . . . . . . . . . . . . . . . . . . .[...]

ii 9.5 Remote Rack Sensor Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 4 9.5.1 DIP Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 9.5.2 Se t 2T Rack Sensor Identities—DI P Switch settings . . . . [...]

iii 14.3 Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 14.4 Inspect and Replace the Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109 14.5 Condensate Drain and Condensate Pump Systems . . . . . . . . . . . . . [...]

iv Figure 20 Chilled water connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Figure 21 Chilled water circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Figure 22 Air bleeding valve position[...]

v Figure 70 Diagnostics / service mode parame ters screen - Page 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 Figure 71 Diagnostics / service mode parame ters screen - Page 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 Figure 72 Diagnostics / service mode parame ters screen - Page 6 . . . . . . . .[...]

vi TA B L E S Table 1 Dry weight, all model types, ± 5% . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 2 Center of gravity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Table 3 Weights without packagi[...]

Important Safety Instructions 1L i e b e r t ® CRV ™ I MPORT ANT S AFETY I NSTRUCTIONS SAVE THESE INSTRUCTIONS This manual co ntains important sa fety instructio ns that should be followed durin g the installa tion and maintenance of the Liebert CRV. Read this ma nual thoroughly before attempt ing to carry out any operations on the Liebert CRV, [...]

Important Safety Instructions Liebert ® CRV ™ 2 NOTICE Risk of overhead interference. Can ca use unit and/or build ing damage. The unit may be too tall to fi t through a doorway while on the skid. M easure the unit and doorway heights and refer to the in stallation plans prior to moving the unit to ver ify clearances. NOTICE Risk of improper sto[...]

Important Safety Instructions 3L i e b e r t ® CRV ™ NOTICE Risk of water leakage. Can cause severe prop erty damage and loss of critical data center equipment. This unit requires a water drain connection. It may require an extern al water supply to operate the humidifier. Improper insta llation, applicat ion and service practices can result in [...]

Liebert CRV Compo nent Location Liebert ® CRV ™ 4 1.0 L IEBERT CR V C OMPONENT L OCATION Figure 1 Component location, common component s—All models Figure 2 Component location - Liebert CR035 RA, CR020RA air-cooled units 1 Liebert iCOM ® control display 2 Electric box 3 Evaporator / CW coil 4 Condensate pump 5 Electric heaters 6 Humidifier di[...]

Liebert CRV Compo nent Location 5L i e b e r t ® CRV ™ Figure 3 Component location - Liebe rt CR 035RW , CR020RW water/glycol-cooled unit s Figure 4 Component location - Liebe rt CR040RC chilled water unit s 2 3 1 4 5 6 7 1 Top water/glycol connections 2 Compressor 3 Brazed plate condenser 4 Bottom water/glycol connections 5 Water/glycol valve 6[...]

Liebert CRV Compo nent Location Liebert ® CRV ™ 6 Figure 5 Overall dimensions / servic e area T able 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) Source: DPN001791, Rev. 2 Only front or [...]

Introd uction 7L i e b e r t ® CRV ™ 2.0 I NTRODUCTION 2.1 Product Description The Liebert CRV is a precision coolin g unit availabl e in compressorized (air-, water- or gl ycol-cooled) and chilled water configuration s to be insta lled within a ro w of high-de nsity computing ra cks in a “hot aisle-cold aisle” configurat ion. Air enters the[...]

Inspection and U npacking Liebert ® CRV ™ 8 3.0 I NSPECTION AND U NP ACKING NOTICE Risk of overhead interference. Can ca use unit and/or build ing damage. The unit may be too tall to fi t through a doorway while on the skid. M easure the unit and doorway heights and refer to the in stallation plans prior to moving the unit to ver ify clearances.[...]

Inspection and U npacking 9L i e b e r t ® CRV ™ • Always keep the packaged Liebert C RV upright and never leave it outdoors. • Be aware of the center of gravit y indicated o n the packag e and in Table 2 below: 3.2.1 Handling the Unit While it is Packag ed Figure 8 Recommended unit handling equipment • Transport the packaged unit using a [...]

Inspection and U npacking Liebert ® CRV ™ 10 3.3 Moving the Unit Using Rigging 1. Use a pallet jack or forkli ft to raise the packaged unit. 2. Place slings under the skid runners, equally spacing the slin gs to make sure the unit is balanced (see Figure 9 ). 3. Lower the unit and remove th e pallet jack or forklift. 4. Con nect the slings to th[...]

Inspection and U npacking 11 Liebert ® CRV ™ Figure 10 Unp acking the Liebert CRV 3.5 Removing the Unit from the Skid 1. Op en the top panel door with the mounted control (refer to Figure 11 ). 2. Remove the bottom baffle panel assembly by removing the s crews with a T30 Torx screwdriver. 3. Set th e baffle panel assembly aside u ntil the Lieb e[...]

Inspection and U npacking Liebert ® CRV ™ 12 Figure 1 1 Removing th e unit from the skid 3.6 Reatt ach the Baffle Panel Once the Liebert CRV has been move d to where it will be installed, the baffle panel can be reattached. 1. Open to p panel door (the one with the L iebert iCOM ® ). 2. Reattach the bottom baffle panel assemb ly with screws, us[...]

Prepare the Liebert CRV for Installation 13 Liebert ® CRV ™ 4.0 P REP ARE THE L IEBERT CRV FOR I NST ALLATION 1. Op en the display d oor and remove the lower front baffle panel u sing a 10mm nu tdriver 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. [...]

Piping Liebert ® CRV ™ 14 5.0 P IPING All fluid and refrigeration connecti ons to the unit, with the exception of th e condensate drain, are sweat copper. Facto ry-installed piping brackets must not be removed. Field-installed pip ing must be installed in accordance with loca l codes and must be properly assembled, supported, isolated and insula[...]

Piping 15 Liebert ® CRV ™ 5.1.1 Condensate Piping—Field-Inst alled • Do not reduce drain lines • Do not expose drain line to freezing temperatures • Drain line may contain bo iling water. Use copper or other suitable material • Drain line mu st comply with local b uilding codes • Emerson recommends installing un der-floor leak de tec[...]

Piping Liebert ® CRV ™ 16 5.1.3 Requirement s of Systems Using W ater or Glycol These guidelines apply to the field leak checking and fluid requirements fo r field piping systems, including Liebert chilled water, condenser (w ater or glycol) and drycooler circuits. General Guidelines • Equipment damage and personal injury can resul t from impr[...]

Piping 17 Liebert ® CRV ™ Leak Checking of Unit and Field Piping Liebert unit fluid syst ems are factory-checked for leaks and may be shipped with a nitrogen holding charge. Liebert un it fluid circuits shoul d be checked for lea ks at installation as described be low. NOTE During leak checking of field- installed piping, Emerson recommend s tha[...]

Refrigerant Connections Liebert ® CRV ™ 18 6.0 R EFRIGERANT C ONNECTIONS NOTICE Risk of oil contamination wit h 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 previou[...]

Refrigerant Connections 19 Liebert ® CRV ™ 6.1 Piping Guidelines—Air-Cooled Unit s • Indoor unit ships with a n itrogen hold ing charge; do not vent the evaporator until a ll refrigerant piping is in place, ready for connection to the unit and condenser • Use copper piping with high temperature brazed joints • Isolate piping from buildin[...]

Refrigerant Connections Liebert ® CRV ™ 20 6.2.1 General Layout 1. Piping must be Type ACR copper tubing and sized per Tables 7 , 8 , 9 and 10 . 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 be nds the largest radius pra[...]

Refrigerant Connections 21 Liebert ® CRV ™ Figure 16 Pipeline air conditioner - condenser 6.2.2 Pipe Diameter and Thickne ss ! WARNING Risk of explosive discharge. Can caus e equipment damage, injury or death. Use only Type ACR copper tub ing sized per Tables 7 , 8 , 9 and 10 for pipes connecting the Liebert CRV and the con densing unit. T able [...]

Refrigerant Connections Liebert ® CRV ™ 22 T able 9 Piping and refrigerant sizes for L iebert air-cooled, VFD c ontrol condensers with R-41 0A 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 [...]

Refrigerant Connections 23 Liebert ® CRV ™ 6.2.3 Inst alling Piping The following operations must be carried out by an experienced refr igeration techni cian. NOTICE Risk of oil contamination wit h water. Can cause equipment damage. The piping must not be open to the atmosphere for extended periods because the Liebert CRV requires POE (polyol es[...]

Refrigerant Connections Liebert ® CRV ™ 24 Figure 17 Connections—air-cooled models LV T LV T 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. T op Connections Unsolder when connecting through bo[...]

Refrigerant Connections 25 Liebert ® CRV ™ T able 1 1 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 Outlet 16mm O.D. Cu Sweat 22mm O.D. Cu Swea[...]

Refrigerant Connections Liebert ® CRV ™ 26 6.3 V acuum and Refrigerant Charge NOTICE Risk of improper refrigerant charge. Can ca use equipm ent damage an d reduced efficiency. Check the refrigerant type to be used on the data plate of the air conditi oner and on the refrigerating compressor. Topping up is requested for short pipeline, t oo, due [...]

Refrigerant Connections 27 Liebert ® CRV ™ Figure 18 Connections for vacuum creat ion and refrigerant charge 6.3.1 Evacuation Air-Cooled Models V ariable Fan Spe ed Control Leak Check and Evacuation Procedure Proper leak check and evacuation ca n b e accomplished only w ith all system solenoid valves open and check valves accounted for. 1. If u [...]

Refrigerant Connections Liebert ® CRV ™ 28 V ariable Fan Spe ed Charging 1. Check unit nameplate for refriger ant type to be used. Unit contro l configurations differ depending on refrigerant type. 2. Charg ing the system with refrigerant requires the unit to be in an operational state.. 3. Calculate the amount of charge for the system. Refer to[...]

Water Connections 29 Liebert ® CRV ™ 7.0 W ATER C ONNECTIONS 7.1 W ater Connectio ns—Supp ly Humidifier and Dr ain W ater , All Models Units with a condensate pump and humidifier are preset to be co nnected from the top. If floor connections are used, the water lines can be intercepted at the following points: Figure 19 W ater connection point[...]

Water Connections Liebert ® CRV ™ 30 7.2 Glycol Mixture Add ethylene glycol or prop ylene glycol to the circuit in the perce ntages shown in Table 18 . 7.3 W ater Connectio ns: W a ter/Glycol-Cooled Models The unit must receive cooling water as follow s: • From an external cooling water source, in open circuit. • Using a drycooler, in closed[...]

Water Connections 31 Liebert ® CRV ™ 7.4 Chilled W ater Connecti ons: Chilled Water Unit s Figure 20 Chilled water connections Refer to Figure 21 when pe rforming these installation steps: • Use copper tubing or steel pipe. • Place the tubing on supporting saddles. • Insulate bo th tubes • Install shutoff ball valves on the in let and ou[...]

Water Connections Liebert ® CRV ™ 32 Figure 22 Air bleeding valve position CW REAR VIEW[...]

Water Connections 33 Liebert ® CRV ™ Figure 23 Connections—water/gly col models HVT LV T LV T HS CP CR CS GDH or HS CR 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 . Str[...]

Water Connections Liebert ® CRV ™ 34 T able 19 Unit connections, water/glycol-cooled models Unit Connections CR20W (50Hz) CR35W (50Hz) CR20W (60Hz) CR35W (60Hz) CS Wa ter/Glycol Coolant Supply 32mm GAS F 1-1/4" FPT CR Water/Glycol Coolant Return 32mm GAS F 1-1/4" FPT GD Gra vity Coil Pan Drain 20mm I.D. 1" MPT GDH Gravity Humidifi[...]

Water Connections 35 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 LV T LV T HVT LV B L VB2 GDH or HS CWR CWR CWS CWS HS CP GD or CP 46-1/4" (1 175) 5" (127) 3-1/4" (83)[...]

Water Connections Liebert ® CRV ™ 36 Figure 25 Recommended drycooler Inst allation T able 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 Dra in 20mm I.D. 1" MPT GDH Gravity Hu[...]

Electrical Connections 37 Liebert ® CRV ™ 8.0 E LECTRICAL C ONNECTIONS 8.1 Electrical connections Figure 26 Remove electrical p anel and lower front p anel ! WARNING Arc flash and electric shock hazard. Can cause injury and death. Disconnect local and remote powe r supplies and wear appr opriate personal protective equipment per NFPA 70E before [...]

Electrical Connections Liebert ® CRV ™ 38 Figure 27 Power and control cable entry point s and routing Before proceeding with the electr ical connections, ensure that: • all electr ical components a re undamaged • all terminal screws are tight • the supply voltage an d frequency are as indicated on the unit 8.1.1 Power Supply Cable Connecti[...]

Electrical Connections 39 Liebert ® CRV ™ 8.2 Protective Features of the Electrically Commut ated Fans The EC fans are protec ted agains t: • Overtemperature of electronics • Overtemperature of motor • Locked rotor pr otection • Short circuit at the motor output When any of these failures occurs, the motor stops, electronically, with no [...]

Sta rt u p Liebert ® CRV ™ 40 9.0 S TA R T UP 9.1 Initial S t artup To start the Liebert CRV: 1. Open all v alves in the refrigerat ion circuit according to the instruct ion lab el attached to the valv e. 2. W Models Only : Open all valves in the water circuit ac cording to the instruction label attached to the valve. 3. Ensure that the refriger[...]

Sta rt u p 41 Liebert ® CRV ™ Checks to Perform af ter St artup Once the system is operating under load, check the various components, as follows: 1. Veri fy that the fans are operating properly. 2. Ensure that the temperature and relative humidi ty a re being con trolled, and that the humidifier (optional) an d heating steps (opt ional) operate[...]

Sta rt u p Liebert ® CRV ™ 42 9.3 Chilled W ater V alve: Chilled W ater 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., maxi mum chille d water flow), the actuator slot is set to “1.” • When the valve is closed (i.e., no chilled wa ter flow), the a[...]

Sta rt u p 43 Liebert ® CRV ™ To adjust the baffles: 1. Open the door containing the Liebert iC OM ® display. 2. Remo ve the two screws holding a ba ffle panel seg ment in place . 3. Slide out the baffle segment. 4. There is one screw on each si de of the baffle, as shown in Figure 31 . Remove the screws and rotate the baffle segm ent around it[...]

Sta rt u p Liebert ® CRV ™ 44 Figure 32 Adjust air-blocking plate Instructions to adju st the air bl ocker: 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 Liebert CRV is capable of suppo rting u[...]

Sta rt u p 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 se nsors have been prese t at the factory. It is recommended that you confirm that the DIP switches have been set correctly using the below tab le. Any additional 2T senso [...]

Sta rt u p Liebert ® CRV ™ 46 9.5.2 Set 2T Rack Sensor Identities—DIP Switch s ettings 1. Confirm the DIP switches are set correctly for 2T sensors numbered 1, 2 and 3. 2. If additional s ensors are to be connected to a cooling unit: a. Ap ply numbered stic kers to the sensor ho usings, corresponding to s ensor chain position. b. Based on the [...]

Sta rt u p 47 Liebert ® CRV ™ Figure 36 T ermination 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 di splay panel. The Display comes “Terminated” from the factor y and will h ave to be “Un-terminat ed’ to allow for addi tional sensors to be added[...]

Sta rt u p Liebert ® CRV ™ 48 9.5.5 Inst alling 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 th e top of the rack’s front door by u sing a cable tie [...]

Sta rt u p 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 an d draw a rack layout that can be viewed in the User menu. 9.5.6 Remote Rack Sensor Operation and Rac k View Setup Figure 38 Rack setup screen, p age 1 [...]

Sta rt u p Liebert ® CRV ™ 50 Figure 40 Rack setup screen, p age 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. Navigate using the arrow and enter ke ys t[...]

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 sy stem. The large Liebert iCOM displa y is standa rd on the Liebert CRV. Each Liebert CRV contains a return air temperat ure and humidity sensor, supply air temperature sensor and three remote rack s[...]

Liebert iCOM ® Control Liebert ® CRV ™ 52 Figure 42 Liebert iCOM ® defa ult screen symbols 10.1 Navigating Through the Liebert iCOM Menus Liebert iCOM sho ws icons and text for monito ring and controllin g your Liebert cooling un its or network of cooling units. The numb er of icons and amount of text shown depends on the display size. 10.1.1 [...]

Liebert iCOM ® Control 53 Liebert ® CRV ™ change the unit being vi ewed. Pressing the ESC key will go b ack a level. Figures 44 and 45 show the Liebert i COM ® control menus for a stand-alone large di splay and f or a networked large displa y, respectively. 10.1.3 Entering a Password To change the value of a parameter in a men u, you must firs[...]

Liebert iCOM ® Control Liebert ® CRV ™ 54 Figure 44 Menu tree—Lar ge display , st and-alone Stat u s M enu – System View St at us Me nu U ni t 1 V i ew User M enu U n it 1 Pa ssw ord Setpoint s Spare Par t Li st Event Log G r aphi cs Vi ew N et w ork Set Alar m s Sensor D at a A cti ve A l a rms D i spl ay S etup Tot al Run H ours Sl eep M [...]

Liebert iCOM ® Control 55 Liebert ® CRV ™ 10.1.4 Viewing Multiple Unit s 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 unit on the network, press either the enter [...]

Liebert iCOM ® Control Liebert ® CRV ™ 56 Figure 46 User menu icons T able 23 User menu icons Icon Name Description Setpoints View and change temperature a nd humidity setpoints Spare Part List Displays the various part numbers of the components/p arts in the cooling unit Event Log Contain s last 400 events Graphics Displays temper ature and hu[...]

Liebert iCOM ® Control 57 Liebert ® CRV ™ Figure 47 Service menu icons Rack View Allows viewing data, colle ct ed by sensors, about rack status Service Contact Info Contains key contact information fo r local service, including names and phone numbers iCOM-DO Change settings for Liebert iCOM ® Discrete Output card T able 24 Service menu icons [...]

Liebert iCOM ® Control Liebert ® CRV ™ 58 Sensor Calibration/Setup All ows calibration of sensors System/Network Setup Allows setup and U2U communication for multip le units Options Setup Allows setup of component operation Rack Setup Label racks, establish settings for sensors Service Contact Info Contains key contact information for local ser[...]

Liebert iCOM ® Control 59 Liebert ® CRV ™ 10.2 Liebert iCOM ® Display Read out The Liebert iCOM controller for the Liebert CRV suppo rts multiple main screen layouts. The screens are a graphica l representation of the Li ebert CRV, selectable to show unit operation with or withou t rack sensors, unit operation with a rack sensor summary, histo[...]

Liebert iCOM ® Control Liebert ® CRV ™ 60 Figure 49 Liebert iCOM ® menu component s for Liebert CR V UNI T 1 Liebert CRV R ack Inle t Te mp Average : 71°F Ma x imu m: 7 3 ° F Min imu m: 6 9 °F 28 . 02.2011 15: 03 UNI T O N 28 . 0 2. 2011 14: 07 (01) UNI T O N 28 . 02. 2011 14: 07 (01) PO WE R O N pres s : for nex t /prev unit; for uni t/s y[...]

Liebert iCOM ® Control 61 Liebert ® CRV ™ 10.3 Liebert iCOM ® Control Setup The Liebert iCOM on the Liebert CRV leave s the factory with the fan spee d 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 th e cold aisle. To unlo ck the full [...]

Liebert iCOM ® Control Liebert ® CRV ™ 62 The supply temperature Setpoint ma y require adjusting since it will be dependent on the dist ance of the CRV to the server racks being cooled. This temperature will also be dependant on rack blanking panels, server population and if con tainment is being used . Table 25 shows the flexibi lity of the Li[...]

Liebert iCOM ® Control 63 Liebert ® CRV ™ Calculating Unit W ellness Liebert i COM ® keeps tabs on the condition of a cooling unit, determining it s wellness and projecting when service will be needed, for the entire unit as well as for individual components. This assists in scheduling maintenance ca lls and helps pinpoi nt components likely t[...]

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 mana ged from any of the temperature sensors. Emerson recommends using the supply temperature sensor to control the co oling capacity of the Liebert CRV. The supply temperature is an accurat[...]

Liebert iCOM ® Control 65 Liebert ® CRV ™ 10.8 Liebert iCOM ® User Menu Screens User menus report general cool ing unit operations and stat us. The user menu password is 1490 . The User menu parameter tables in this manual may di ffer from the d isplay on your cooling uni t. The Liebert iCOM funct ions with several Liebert Precisi o n Cooling [...]

Liebert iCOM ® Control Liebert ® CRV ™ 66 Vie w N e tw o rk View Network —The view netw ork screen provides an overv iew 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 dat a parameters [...]

Liebert iCOM ® Control 67 Liebert ® CRV ™ Figure 54 Display set up p arameters screen Language —This parameter sets the lang uage on the display. When this parameter is changed all menu parameters will be conver ted to the selected language. Date —This parameter sets the internal date of the unit. If this unit is connected to other unit s w[...]

Liebert iCOM ® Control Liebert ® CRV ™ 68 Figure 55 T ot al run hours p arameters screen Each parameter shows the actual hours the comp onent has operated and the maximum time the component can operate befo re the next maintenance. 10.9 Liebert iCOM ® Service Menu Screens Service menus allow custom ized settings for site operations. The passwo[...]

Liebert iCOM ® Control 69 Liebert ® CRV ™ Figure 57 Setpoint s parameters sc reen - Page 1 Temperature Setpoint —This parameter selects a temperature that the cooling uni t will maintain by applying cooling an d or reheats. This paramete r is adjustable from 41-104°F (5-40° C), the factory default setting is 73 °F (22.7°C). Temperature Co[...]

Liebert iCOM ® Control Liebert ® CRV ™ 70 Figure 58 Setpoint s parameters sc reen - 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 setting from the factory is 50%. Humidity[...]

Liebert iCOM ® Control 71 Liebert ® CRV ™ Figure 59 Setpoint s parameters sc reen - Page 3 Fan Control Type —This parameter sets how the fan speed will be controlled. This parameter can be set to Auto mode, which wi ll allow the Liebert CRV to drive the fan based on the temperature sensor selected for sensor control type. This parameter can a[...]

Liebert iCOM ® Control Liebert ® CRV ™ 72 Figure 60 Setpoint s parameters sc reen - Page 4 MIN at CFC for EC Fan —This parameter can provid e 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 th e call for fan reach[...]

Liebert iCOM ® Control 73 Liebert ® CRV ™ Figure 61 S tan dby settings / lead-lag p arameters 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 —This parameter controls when a rotatio [...]

Liebert iCOM ® Control Liebert ® CRV ™ 74 Figure 62 W ellness basic settings screen- Page 1 Maintenance Frequenc y Per Year —This parameter sets the numbe r of expected maintenance visits in a one year time span. Max Bonus —This parameter will increase the time to the next maintenan ce cycle. A bonus should be assigned when a service vi sit[...]

Liebert iCOM ® Control 75 Liebert ® CRV ™ Figure 63 W ellness motor settings p arameters 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 displays the average run time of the unit[...]

Liebert iCOM ® Control Liebert ® CRV ™ 76 Figure 64 W ellness compressor 1 settings p arameters 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 —This parameter displays the average [...]

Liebert iCOM ® Control 77 Liebert ® CRV ™ Figure 65 W ellness electric heater 1 settings p arameters 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 —This parameter displays the average r[...]

Liebert iCOM ® Control Liebert ® CRV ™ 78 Figure 66 Wellness humidifier setti ngs p arameters 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 parameter displays the average ru[...]

Liebert iCOM ® Control 79 Liebert ® CRV ™ Figure 67 Diagnostic s / service mo de p arameters screen - Page 1 HP 1 Alarm Code —Compressor 1 high pressure alarm code. LP 1 Alarm Code —Indicates which phase compressor 1 is opera ting in. For more i nformation on this refer to the Liebert iCOM ® Training and Service manua l’s low pressure tr[...]

Liebert iCOM ® Control Liebert ® CRV ™ 80 Figure 68 Diagnostic s / service mo de p arameters screen - Page 2 Manual Mode —Use this setting to place the Li ebert iCOM ® control in manual mode. This is the initial settin g necessary to activate any of the following items. Motor(s) —Setting this option to ON will start the main fan of the uni[...]

Liebert iCOM ® Control 81 Liebert ® CRV ™ Humidifier Fill —This activates just the hum idifier water source solenoid valve which fills the humidifier pan or canister with water. Humidifier —This activates the humidifie r system in its entirety. Humidifier Drain —This activates just the humidifier drai n solenoid in th e case of the steam [...]

Liebert iCOM ® Control Liebert ® CRV ™ 82 Figure 71 Diagnostic s / service mo de p arameters 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 th e unit’s air proof sw itches. Status Filter —This shows the status of the uni t’s filter[...]

Liebert iCOM ® Control 83 Liebert ® CRV ™ Figure 73 Set alarms p arameters screen - Page 1 Temp/Hum Events —This parameter enab les or disables all of the tempera ture and humidity events. High Supply Temperature —This parameter sets the high temperature t hresh old that will tr igger an alarm on the Liebert iCOM ® local display and any mo[...]

Liebert iCOM ® Control Liebert ® CRV ™ 84 Figure 74 Set alarms p arameters screen - Page 2 Customer Input 1, 2, 3 & 4 —These parameters select the devi ce and operation of the customer inputs. Each event reflects a different alarm and po ssible action to the unit . Refer to table 7 for a description of selectab le options. Customer Input [...]

Liebert iCOM ® Control 85 Liebert ® CRV ™ Figure 76 Set alarms p arameters screen - Page 4 This screen selects the operation of an activ e alarm. Each event can be enabled or disabled an d can be set to operate as an alarm, wa rning or message. The delay is th e time the control waits before reporting the event. • Alarm: Annunciates the bu zz[...]

Liebert iCOM ® Control Liebert ® CRV ™ 86 Figure 77 Sensor calibrat ion / setup pa rameters - Page 1 Return Temperature —This paramet er adjusts the return te mperature reading from the actual sensor to compensate for any error of the sensor or to match other s ensors in the room. Calibrated Return Temperature —This parameter shows the adju[...]

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 p rovide an offset to th e actual sensor reading to calibrate the units sensor to other sensors. Calibrated Return T Sensor —This parameter is the reading[...]

Liebert iCOM ® Control Liebert ® CRV ™ 88 Figure 80 Sensor calibrat ion / setup pa rameters - Page 4 This unit can be equipped with a total of 20 ra ck sensor reading s or 10 2T temperature sensor modules. This menu provides the abili ty to calibrated by entering a negative or positive offset. The calibrated read ing is displayed in the far rig[...]

Liebert iCOM ® Control 89 Liebert ® CRV ™ Network Sa fe —This parameter saves or loads network se ttings for the displa y that hav e been modified from the factory defaults to an internal f ile that can be download ed / uploaded u sing the Liebert i COM ® Service Tool. Sele cting “Save” will write th e settings to the internal storage fi[...]

Liebert iCOM ® Control Liebert ® CRV ™ 90 Figure 83 System/Network setu p p arameters Unit- Page 1 Monitoring Address —This parameter sets the address used by the Lieber t IntelliS lot ® cards. This is set to 3 from the factory and should not be change d. Monitoring Timeout/Handshake —This parameter can be used with a buildin g management [...]

Liebert iCOM ® Control 91 Liebert ® CRV ™ Figure 84 System/Netwo rk setu p pa rameters Unit - Page 2 Monitoring Protocol —This parameter selects the monitoring protocol. Velocity V3 is the factory default which w ill provide communi ca tions to the Lieb ert IntelliSlot ® housing. iGMNet will activate the 77/78 terminals f or communica tions [...]

Liebert iCOM ® Control Liebert ® CRV ™ 92 Figure 85 Rack Overview , Page 1 This screen shows the rack label a ssigned to each rack and the temp erature associat ed with the rack sensor. This screen shows the relative distance between the Liebert CRV and each rack sensor. Figure 86 Rack Setup, Page 1 Rack Sensors are automatically de tected when[...]

Liebert iCOM ® Control 93 Liebert ® CRV ™ Figure 87 Rack Setup, Page 2 The Rack Setup display allows creating a gr aphical map of the remote rack sensors. When the Assigned Sensors 1-6 are selected, it w ill drop the user down to assign the senso r node address to the first group of six “boxes.” Setting “CRV” instead of a number (CRV is[...]

Liebert iCOM ® Control Liebert ® CRV ™ 94 Figure 89 Options setup p arameters - Page 1 Low Pressure Alarm Delay —This parameter sets the amoun t of time that the unit will ignore a low pressure con dition. In the past this parameter has also been referred to as a Winter Start Time. This parameter ca n be set betw een 0 to 5 min utes. Electric[...]

Liebert iCOM ® Control 95 Liebert ® CRV ™ Figure 90 Options setup p arameters - Page 2 WA and AL Relay — Dehumidifica tion Enab led —This parameters selects if the compressor and / or valve wi ll be used to dehumidify when the humi dity is abo ve setpoint. Auto Restart Enabled —This parameter when set to “Yes” rest arts the unit after[...]

Liebert iCOM ® Control Liebert ® CRV ™ 96 T able 27 Service cont act info p arameters 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 United States Australia New Zealand Indonesi[...]

Operation in T eamwork Mode 97 Liebert ® CRV ™ 11 . 0 O PERATION IN T EAMWORK M ODE 1 1.1 Unit-to-Unit Network Wiring Liebert CRV’s can be connected in a unit-to-unit, or U2U, configuration, whic h allows multiple units to communicate with each other, sharing of local unit status and sensor read ings. The U2U network will allow up to 32 units [...]

Operation in T eamwork Mode Liebert ® CRV ™ 98 1 1.3 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 ca bles from a netw ork switch. One cable connects to port P64 on th e Liebert iCOM input/outp[...]

Operation in T eamwork Mode 99 Liebert ® CRV ™ W all-Mount Large Display The Liebert CRV has a large displa y as standard equipme nt. Only large displays can be used for remotely monitoring and controllin g cooling units connected on the same network. Each wall-mount large display requires 120V i nput power; Liebert provides an AC adapter wall p[...]

Operation in T eamwork Mode Liebert ® CRV ™ 100 Figure 93 T eamwork modes and sen sor management 1 1.4.1 Application of T eamwork Modes • No Teamwork : Multiple zones in one room • Teamwork Mode 1 : Balanced load (small groups of units inside the same environment) • Teamwork Mode 2 : Unba lanced load ( large rooms, not a ll units will h av[...]

Operation in T eamwork Mode 101 Liebert ® CRV ™ Figure 94 shows how two cooling units work together in Teamwork Mode 1. Since Unit 1 an d Unit 2 are availabl e to operate, the master uni t, Unit 1, averages the temperat ure and humidity se nsor readings from each u nit. The master unit determines that a 60% call for cooling is requir ed for the [...]

Operation in T eamwork Mode Liebert ® CRV ™ 102 1 1.4.5 St andby—Rotation T ypical St andby (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 one regular unit has an alarm that is de[...]

Operation 103 Liebert ® CRV ™ 12.0 O PERATION Figure 95 Return air temperature and humidity s ensor viewed from the rear of the unit The control system compares the relaye d informatio n with the programmed setp oint and proportional band values and pe rforms one of the following operations: • Cooling —Direct expansion mode (DX): The compres[...]

Operation Liebert ® CRV ™ 104 • Humidification (optional)—The humidif ier 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 activ ated when the measured temperature and humidity sensor has been calcu- lated to exceed the correspo[...]

Operation 105 Liebert ® CRV ™ 12.1 Alarms/Event s 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 is ackn owledged, the alarm will silence and t[...]

Calibration an d Regulation after S tartup Liebert ® CRV ™ 106 13.0 C ALIBRATION AND R EGULATION AF TER S T ARTUP The Liebert CRV has been fact ory-tested and calibrated , but it is very importa nt to check, at startup, the superheating of the thermostatic valve (A/W versions). • For calibrations of instruments installe d on the external conde[...]

Maintenance 107 Liebert ® CRV ™ 14.0 M AINTENANCE 14.1 Safety Instructions All maintenance operations must strictly observe national, state and local accident prevent ion regulations, especially th e regulations concerning electrical sy stems, refrigerators and manufacturing resources. Air conditioning equipment maintenance may be perf ormed onl[...]

Maintenance Liebert ® CRV ™ 108 14.2 Sp are Parts Only original spare pa rts made by Emerson Network Power may be used. Using third-party mat erial can invalidate the warranty. Wh en making seeking technical a ssis tance, always refer to the component list supplied with the equipment, and specify the model number, serial number and, if available[...]

Maintenance 109 Liebert ® CRV ™ 14.4 Inspect and Repl ace the Air Filter Check the air filter monthly to maintain efficient air distributi on through the evaporator coil. 1. Switch Off the CRV . 2. Op en the rear panel by rotating the three locks wi th a screwdriver. 3. Wait until the fans stop rotating. When you open the first lo ck, you a lso [...]

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 CR V. 3. Pu ll it out of the unit. 4. Lift the lower filter up 5. Pull the bottom of the filter away from the Liebert CR V. 6. Pu ll it out of the unit. Figure 97 Remove the air filters [...]

Maintenance 111 Liebert ® CRV ™ 14.5 Condensate Drain and Co ndensate 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. Check for and clear obstructions in grav ity[...]

Maintenance Liebert ® CRV ™ 112 14.8 Dismantling the Unit The Liebert CRV has been de signed and built to ensure continuous operation. The working li fe of some of the main components, such as th e fan and the compressor, depends on proper maintena nce. NOTICE Risk of release of hazardous substances into the environm ent. Can cause environmental[...]

Maintenance 113 Liebert ® CRV ™ • Additional information l ocated in a dedicated label of the unit (Reg. 1494/2007) : a. Where fluorinated greenhouse gas is foreseen to be added to the eq uipment outside of the manufacturing site at the point of installation, a dedi cated label accommodates notation of both the quantity (kg ) pre-charged in th[...]

Trou bleshooting Liebert ® CRV ™ 114 15.0 T ROUBLESHOOTING T able 29 Unit diagnostics Problem Possible Cause Corrective Action Rack temperature is too high Dirty filters Replace filters Filter clog sensor fai lure Call Emerson Netwo rk Power Incorrect positioning of remote temperature sensor(s) Verify that remote temper ature sensors are correct[...]

Trou bleshooting 115 Liebert ® CRV ™ T able 30 Liebert iCOM ® medium control board DIPs witch settings DIPswitch Number Compressorized CRV models CR020 and CR035 Chilled Water Model-CR040 1O n O f f 2O f f O f f 3O n O f f 4O f f O f f 5O f f O f f 6O f f O f f 7O f f O n 8O n O n[...]

Humidifier Liebert ® CRV ™ 116 A PPENDIX A-H UMIDIFIER A.1 P RINCIP AL OF O PERATION When the Liebert iCOM ® calls, the cy linder fills to 1 00% of th e Full Load Amperage (FLA) or to the top of the cylinder, whic hever comes first. See Figure 100 . If it reaches 100% FLA, the water heats and boils away to a level giving 80% FLA. An electr onic[...]

Humidifier 117 Liebert ® CRV ™ A.1.1 Humidifier Water Supply and Plumbing The fill valve is sized for an exte nded 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 v alve with an o v ersized opening will be supplied. For installations where [...]

Humidifier Liebert ® CRV ™ 118 A.1.3 Humidifier St artup and Operation • Ambient tempe rature location f or humidifier: 4 1 - 104 ° F (5 - 40 ° C). • Relative humidity location for humidifi ers: 5 - 80% RH. Check to see that the unit is securely mounted on a level surface with the proper dra in and water supply. Check for correct voltage w[...]

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 befo re removing. This is do ne by pushing the auto On/Off/Drain switch to the “drain” position. 3. When the cylinder is empty, push the auto On/Off/Drain switch to the Off position. 4. Open the main[...]

Humidifier Liebert ® CRV ™ 120 A.1.6 Humidifier T roubleshooting T erms Used • FLA (Full Load Amps) are amps listed on the hu midifier specification label. • Short cycling occurs when the hu midifier’s “On time” is less than 10 minutes upon a call for humidity. To correct short cycling, all humidifiers have a capacity adjustment that a[...]

Humidifier 121 Liebert ® CRV ™ A.3 S TAR T I N G P OI NT Auto On/Off/Dra in switch in O n position—unit w ill not fill: When the On/Off control circuit is made and the Au to On/Off/Drain sw itch is pushed to On, the 24V holding coil of the primary contactor should energi ze. The resulting magnetic pull closes the high voltage contacts with a d[...]

Humidifier Liebert ® CRV ™ 122 T able 31 Humidifier troubleshooting Unit Status Lamp Symptom Corrective actions Yellow Green On On Maximum water level insid e cylinder. This usually happens on initial start-up after replacing the cylinder (normal). W ater is concentrated with mi nerals inside the cylinder. Let unit run; yellow light will disappe[...]

Electrical Data 123 Liebert ® CRV ™ A PPENDIX B-E LECTRICAL D AT A NOTICE Risk of exceeding line -to-ground limit. Can cause equipment damage. The electrically commutated (EC) motors in cluded in 480V CR035 and CR040 units are suitable for connection to power supplies with 300V or less line to ground potential. Excess line-to-ground voltage can [...]

Electrical Field Conn ections Descriptions Liebert ® CRV ™ 124 A PPENDIX C-E LECTRICAL F IELD C ONNECTION S D ESCRIPTIONS C.1 S T ANDARD E LECTRICAL C ONNECTIONS (Source: DPN001 884, Rev. 4, Page 1) 1. High Voltage Connection Through th e Bottom of the Electric Panel —1-3/8" (34.9mm), 1-3/4" (44.5mm) 2-1/2" (64mm) diameter conce[...]

Electrical Field Conn ections Descriptions 125 Liebert ® CRV ™ NOTICE Risk of improper input power. Can cause equi pm ent damage. The electronically commutated mo tors included in the Lieber t CRV unit are suitable for connection to an electrical service providi ng input power to the unit with 300V or less line-to- ground potent ial only. Accept[...]

Refrigerati on and Hydraulic Circu its Liebert ® CRV ™ 126 A PPENDIX D-R EFRIGERATION AND H YDRAULIC C IRCUIT S Figure 105 General arrangement—air-cooled unit s Distributor + + Suction Line DPN001984 Rev . 4 Factory Refrigerant Piping Field Piping Outdoor VFD Condenser Vibration Absorber Vibration Absorber Check V alve Low-Pressure T ransducer[...]

Refrigerati on and Hydraulic Circu its 127 Liebert ® CRV ™ Figure 106 General arrangement—water-gly col units Ch ec k V a lv e AB B A A AB B NO TES 1. S chematic representation show n. D o not use for specific c onnection locations. 2. Install a 35 mesh straine r, in an easily ac cessible loc ation, on t he wat er/glycol supply to prevent part[...]

Refrigerati on and Hydraulic Circu its Liebert ® CRV ™ 128 Figure 107 General arrangement—chilled water B AB A A AB B DPN001986 Rev . 1 NOTE: Schematic representation shown. Do not use for specific connection locations. Factory Refrigerant Piping 3-W ay Chilled W ater V alve Configuration Air Bleed V alve 2-W ay Chilled W ater V alve Configura[...]

Refrigerati on and Hydraulic Circu its 129 Liebert ® CRV ™ NOTES[...]

Refrigerati on and Hydraulic Circu its Liebert ® CRV ™ 130[...]

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Ensuring The Hi gh Av aila bilit y Of Mission-Critic al Data And Ap plic ations. Emerson Net work Po wer , a business of Emerson (NYSE:EMR), is the global leader in enabling Business-Critic al Continuity ™ from grid to chip f or telecommunication networks, data centers, health care and industrial facilities. Emerson Network Po wer provides inno v[...]