Liebert CR020 User Manual Download Page 39

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Chapter 5 Water Connections 29

Liebert.CRV Series Air Conditioner User Manual

It is advised to install the dry cooler following Figure 5-7.

Air

conditioner

HTC

Stand-by pump

Disconnect after charge

Filling

water

(Option)

HTC

Shut-off valve

Pump

Check valve

Thermostat

Variex (option)

Safety valve

Expansion tank

Air separator

Filling meter

Drain (at lowest point)

-o

-p

Manometer

Charge group (filter, reducer, check valve)

Figure 5-7 Schematic diagram of installing d

ry cooler

For detailed parameters, refer to

Appendix 4 Refrigerant, Hydraulic And Electrical Connections

Summary of Contents for CR020

Page 1: ...the nearest Emerson local sales office or service center Copyright 2010 by Emerson Network Power Co Ltd All rights reserved The contents in this document are subject to change without notice Emerson...

Page 2: ......

Page 3: ...on the front and back panels reminds that The machine restarts automatically The main switch must be opened before opening the internal compartments for any operation If the doors are opened immediate...

Page 4: ...2 0 Digit 1 and 2 Family CR Liebert CRV Digit 3 4 and 5 Cooling Capacity kW approx Nominal cooling capacity Digit 6 Air Discharge R Horizontal airflow Digit 7 System Type A System Type Air cooled W Sy...

Page 5: ...out C Option Package 2 humidifier and reheat lockout one additional alarm D Option Package 3 compressor jacket Digit 19 Monitoring N Without IS housing 0 With IS housing no card 1 One IS web card 2 Tw...

Page 6: ......

Page 7: ...1 2 Pipe Diameter And Thickness 20 4 1 3 Installing Pipelines 21 4 2 Vacuum Creation And Refrigerant Charge 22 4 2 1 R410A Precharge For Air Cooled A Units 23 4 2 2 Refrigerant Charge For Air Cooled...

Page 8: ...5 Condensate Drain And Condensate Pump Systems 43 10 5 1 Condensate Drain 43 10 5 2 Condensate Pump 43 10 6 Air Cooled Condenser And Drycoolers 43 10 7 Electrical Heaters 43 10 8 Refrigeration Circuit...

Page 9: ...dix 2 Technical Data Tables 52 Appendix 3 Installation Drawing 55 Appendix 4 Refrigerant Hydraulic And Electrical Connections 59 Appendix 5 Refrigeration Hydraulic Circuits 64 Appendix 6 Wiring Diagra...

Page 10: ......

Page 11: ...ances before moving the unit Caution Risk of frozen fluids Risk of frozen fluids Can cause equipment damage Keep the unit upright indoors and protected from dampness freezing temperatures and contact...

Page 12: ...Glycol cooled Chilled water CR020 380V 415V 3 phase 50Hz 335 350 CR035 380V 415V 3 phase 50Hz 365 385 CR040 380V 415V 3 phase 50Hz 330 Note Weights of full version units without packaging 1 3 Operatin...

Page 13: ...odel Exceeding of this limit or a lack of maintenance will caused a compressor stop by HP safety thermostat Reset to normal operation can only be carried out manually Once the condensing pressure rise...

Page 14: ...e 1 2 Appearance of the air conditioner Example of installation The Liebert CRV is a range of full featured compressorized air water glycol cooled and chilled water cooling units to be installed withi...

Page 15: ...ion air conditioner including cooling heating humidification dehumidification air filtration condensate management temperature control alarm functions and data communications The Liebert CRV is optimi...

Page 16: ...s 8 Drain tray 9 EC fans Figure 1 6 Component locations The component locations of Liebert CR020 CR035 air cooled A units are shown in Figure 1 7 8 1 10 3 4 7 9 2 5 6 1 Termostatic expansion valve 2 S...

Page 17: ...2 Compressor 3 Water condenser 4 Bottom water connections 5 Three way water valve Figure 1 8 Component locations of Liebert CR020 CR035 water glycol cooled W units The component locations of Liebert...

Page 18: ...on Sales Representative 1 Placement in the row of racks For single row application with one Liebert CRV unit it is not preferred to put the unit in the middle of the row because of possible hot spots...

Page 19: ...t is being led far from server suction and hot air may by passed from hot aisle Exceptions where wider cold aisle may be used are applications with CoolFlex Cold Aisle Containment or with two rows fac...

Page 20: ...aisle containment or in application with more Liebert CRV units The best approach is to keep a gap between at least 0 65m or to use more Liebert CRV units Good approach is also having wall at the furt...

Page 21: ...rt CRV units have to be designed in order to achieve required cooling capacity if any of the units fails The other option to easily achieve redundancy is CoolFlex Cold aisle containment see point 5 be...

Page 22: ...W per rack with less floor space available especially when scalable solution is required starting from less heat load and ready for future grown the best answer is Liebert CRV together with Liebert XD...

Page 23: ...ve packaging from the unit or prepare the unit for installation Notice Risk of overhead interference Risk of overhead interference Can cause unit and or structure damage The unit may be too tall to fi...

Page 24: ...require the unit to be lifted higher than 102mm great care shall be exercised and all by standing personnel are to be no closer than 5m to the lift point of the unit 3 4 Unpacking The Unit Move the pr...

Page 25: ...d onto the pallet with M8 45 bolts as shown in Figure 3 5 You can use an M10 open end spanner a ratchet spanner or a sleeve to remove the screws Pallet fixing bolts 4 pcs Figure 3 5 Remove the pallet...

Page 26: ...unit for service is revealed See a in Figure 3 7 a Figure 3 7 Serial number of the unit 2 Using a screwdriver open the electrical panel and the front down panel to prepare installation as shown in Fig...

Page 27: ...c problems Finally lock the top bolts c in Figure 3 10 c Figure 3 10 Lock the top bolts 3 Connect the unit as described in below paragraphs refer to Chapter 4 Refrigeration Connections for units type...

Page 28: ...own in Figure 3 12 Figure 3 12 Direct air flow up 2 Turn the baffles if necessary to direct right or left the air flow in Figure 3 13 1 Remove the screws one on left and one on right 2 Disassemble onl...

Page 29: ...t pressurized with nitrogen at 2bar and the de brazing of the bottoms from the connections must be carried out as last operations immediately followed by the connection and emptying of the whole syste...

Page 30: ...thetic reasons Only for aesthetic reasons Liquid inlet Absolutely not Not necessary No expose to cold underfloor air Liquid outlet Only for aesthetic reasons Only if exposed to sun Only if exposed to...

Page 31: ...qual to pipe diameter Bend the pipes as follows Soft copper by hand or bending device Hard copper use preformed curves Do not overheat the pipes when brazing so as to minimize oxidation 2 Connect the...

Page 32: ...m 2 70m 2 40m 22mm 0 70m 0 35m 1 10m 3 20m 2 80m 4 2 Vacuum Creation And Refrigerant Charge Warning 1 Check the refrigerant type to be used on the data plate of the air conditioner and on the refriger...

Page 33: ...ic valve 4 2 1 R410A Precharge For Air Cooled A Units 1 Open all cocks of the system including those used for pressurizing ambient unit and condensing unit By this operation all the components of the...

Page 34: ...Rotalock cocks and of the connected Schrader valves 6 Inspect all connections joints using a leak detector If a leak is found empty the pipes and the condenser seal the leak and repeat the instructio...

Page 35: ...or the chilled water C unit or cooling water W unit f e Figure 5 1 Supply and drain water connection 5 1 General Warning If the tubing is to run outdoors add glycol to the circuit as described in Tabl...

Page 36: ...Use galvanized steel PVC or flexible polythene tubing Allow a 2 gradient towards the drain There must be a drain trap placed at least 20 cm 8 below the drain tray The drain trap must be placed under...

Page 37: ...isable to install a water drain system at the lowest point in the circuit Fully drain the piping before connecting it to the air conditioner 5 3 1 Notes For Open Circuit Applications Use the unit with...

Page 38: ...ns The chilled water circuit is shown in Figure 5 6 as described below Use copper or steel Mannesmann tubing Place the tubing on supporting saddles Insulate both tubes using Armaflex insulation Place...

Page 39: ...charge Filling water Option HTC TS Shut off valve Pump Check valve Thermostat Variex option Safety valve Expansion tank Air separator Filling meter Drain at lowest point Pressure operated by pass Mano...

Page 40: ...n which g is the cable entry port for low voltage signal cable h is the cable entry port for power supply cable h g h g Bottom cable entry ports Top cable entry ports Figure 6 1 Cable entry ports of L...

Page 41: ...e two cables supply and Ethernet available for connecting so to manage all the parameters like front iCom display For part numbers and specification refer to Appendix 6 Wiring Diagram For electrical d...

Page 42: ...To reset the thermal protection push the bottom in front of the unit as indicated in Figure 6 5 Figure 6 5 Resetting button 6 4 Temperature Probes Placed On Racks Each unit is provided with at minimu...

Page 43: ...on like a chain Secure the temperature sensor in front of the warmest heat source in the enclosure Do not secure in front of a blanking panel For this operation use the support provided for each probe...

Page 44: ...s to be set to pin 2 and pin 3 If a CAN device is in the middle between other CAN devices no termination has to be set the jumper remains on pin 1 and pin 2 To connect the temperature probes to use on...

Page 45: ...e will light after turning on the unit because of the presence of electric power If the LED does not light up Check the electric panel power supply Check the protection devices e g thermal switches Ch...

Page 46: ...tion it is necessary to use two calibrated manometers and connect them as follows M1 is connected to the compressor delivery valve M2 is connected to the Schrader valve 2 in Figure 7 1 1 2 3 4 5 6 1 L...

Page 47: ...e by pass open Position indicator on 1 open valve three way valve by pass closed Figure 7 2 Position of the chilled water valve actuator for two way or three way valve Note 1 In the unlikely event of...

Page 48: ...efrigerant flows through the evaporator thus cooling the air passing over it Chilled water mode CW The three ways valve is opened and the chilled water flows through the coil thus cooling the air pass...

Page 49: ...tes 3 Measure the superheat as follows 1 Place a contact thermometer on the tube exiting the evaporator 2 Connect a manometer to the compressor suction valve 3 The overheating is the difference betwee...

Page 50: ...y when it is at standstill Do this by switching off the air conditioner at the controller and the main switch Post a warning sign saying Do not switch on Electrical components of device have to be swi...

Page 51: ...glycol inlet temperature Check water regulating valve operation Check in out water glycol t Check mixture glycol level if applicable Refrigerating circuit Check compressor noise vibrations Check oil...

Page 52: ...g the filter before reassembly check that the position of air differential pressure switch pipes clogged filter alarm would be in right position and in right order Check also that the drain trays woul...

Page 53: ...for leaks 10 6 Air Cooled Condenser And Drycoolers The cleaning procedures are as follows 1 Clear coil surface of all debris that will inhibit airflow 2 Check for bent or damaged coil fins and correct...

Page 54: ...y at 100 C 5 6cSt Viscosity index ISO Grade 32 Table 10 3 Mobil EAL Arctic 22CC oil Item Description Density at 15 C 0 967kg l Flash point C O C 245 C Pour point 54 C Viscosity at 40 C 23 6cSt Viscosi...

Page 55: ...ystem or more of f gases certified personnel and companies according to Reg 303 2008 provides regular leak testing according to Reg 1516 2007 and Reg 1497 2007 and maintain records of maintenance acti...

Page 56: ...t circuiting issues Verify unit positioning room configuration Verify unit air baffles set up Verify cold aisle containment seals if applicable Insufficient room cooling capacity Reduce racks heat loa...

Page 57: ...CR040RC Note Unit is factory set to produce about 70 of the maximum value 2 Installation The humidifier is supplied already mounted within the air conditioner The only necessary operations are the co...

Page 58: ...K Note 1 Do not cut the bracket of this drain trap or the draining of the condenser will be affected 2 Fill the drain trap with water before startup to avoid spraying condensate 3 To avoid water leak...

Page 59: ...4 1 Start Up Before using the humidifier check the following Supply and drain connections That the cut off tap is open All wiring Earthing Steam hose connection between steam cylinder and distributor...

Page 60: ...do the clip R 6 Pull the cylinder C out of its gland at the bottom G 5 2 Replacing The Steam Cylinder When the steam cylinder is approaching the stage where it needs to be replaced warning A25 is gene...

Page 61: ...become hard and brittle 14 Thoroughly flush the drain line E 15 Reassemble the humidifier by carrying out the above instructions in reverse order Attention always empty the cylinder completely before...

Page 62: ...fication Fan humidifier CR040 380V 415V 3N 50Hz 9 5 9 5 20A Curve C Note 1 Without condensate pump option 2 The cables have to be sized in compliance with local standards and according to the type and...

Page 63: ...charge oil within compressor kg Max system refrigerant charge before oil addition kg Weight of oil to add for every 4 5kg of refrigerant over Max system charge g Initial oil charge Max topping up CR0...

Page 64: ...0 1000 2000 4000 8000 CR020 air cooled models 100 2454 4170 PWL 73 8 69 4 71 77 3 75 9 74 2 73 5 68 2 59 2 79 6 69 2 75 2166 3680 PWL 71 2 66 8 68 4 74 7 73 3 71 6 70 9 65 6 56 6 77 66 9 55 1780 3025...

Page 65: ...Drawing 55 Liebert CRV Series Air Conditioner User Manual Appendix 3 Installation Drawing 2000 Front view 600 75 1175 Figure 5 Dimensions of the air conditioner unit mm 1245 1245 Figure 6 Front and ba...

Page 66: ...6 Appendix 3 Installation Drawing Liebert CRV Series Air Conditioner User Manual 350 650 700 650 1175 550 2725 100 100 600 700 B S S A Service area is S B or S A Figure 7 Service area top view unit mm...

Page 67: ...eries Air Conditioner User Manual Unit area 1175 600 1175 44 90 52 234 195 5 80 324 5 600 55 5 544 5 55 31 5 154 5 414 130 Dimensions of the unit area Front view Figure 8 Dimensions of the raised floo...

Page 68: ...nditioner User Manual Air bleeding valve A A amplified Figure 9 Position of the air bleeding valve for chilled water models rear view Bottom inlet possible with raised floor Front view Top inlet Ampli...

Page 69: ...R035RA connections unit mm Table 9 Refrigerant and hydraulic connections for air cooled units Unit connection CR020RA CR035RA IL Refrigerant liquid line inlet OD 12 7mm CU sweat OD 16 mm CU sweat OG R...

Page 70: ...ections unit mm Table 10 Refrigerant and hydraulic connections for water cooled units Unit connection CR020RW CR035RW IWC Water to condenser inlet 32mm GAS F 32mm GAS F OWC Water from condenser outlet...

Page 71: ...3 CR040RC connections unit mm Table 11 Refrigerant and hydraulic connections for chilled water units Unit connection CR040RC ICW Chilled water inlet 32mm GAS F OCW Chilled water outlet 32mm GAS F CD C...

Page 72: ...ections 1 Primary high voltage entrance 64mm 44mm 35mm diameter concentric knockouts located in bottom of the box 2 Secondary high voltage entrance 64mm 44mm 35mm diameter concentric knockouts located...

Page 73: ...oss terminals 61 62 and send a visual and an audible alarm This smoke sensor is not intended to function as or replace any room smoke detection system that may be required by local or national codes 1...

Page 74: ...limit for CRV unit 1 Compressor 2 Crankcase heater 3 High pressure switch HP 4 Air cooled condenser 5 Liquid receiver 6 Access valve 7 Safety relief valve 8 Filter dryer 9 Sight glass 10 Thermostatic...

Page 75: ...et bottom connections 1 Compressor 2 Crankcase heater 3 High pressure switch 4 Water cooled condenser 5 Liquid receiver 6 Access valve 7 Safety relief valve 8 Filter dryer 9 Sight glass 10 Thermostati...

Page 76: ...op connections Only with optional 2 way valve Chilled water outlet bottom connections Chilled water inlet top connections Chilled water inlet bottom connections 1 Chilled water cooling coil 2 Three po...

Page 77: ...2 1 P3 P4 Isolation board A6 P1 TAM BK BK A6 P3 A6 P4 P64 A1 P64 A3 Humidification control board A5 1 2 3 4 5 6 P1 1 2 3 4 5 6 P2 7 8 9 10 24 0 XPE Drain solenoid valve P66 P67 A6 P1 6 A6 P1 5 A6 P1 4...

Page 78: ...4 24 24 24 105106 121121121125127 126 128 400401402 300301302 50 51 51 52 53 53 54 054 55 61 61 62 63 81 82 83 84 710710 Y2 G0 70 71 72 73 22 395 126 19 Y1 Y1 00 00 U02 U01 R8 S8 PE9 TB R8 TB S8 TB PE...

Page 79: ...106 400401402 300301302 51 51 52 53 53 54 054 61 61 62 63 81 82 83 84 710710 Y2 G0 70 71 395 19 Y1 Y1 00 00 U02 U01 R8 S8 PE9 TB R8 TB S8 TB PE9 Ethernet or CAN wiring Inline quick disconnect BK Y GN...

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