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Application Guide

Scroll compressors

CH290 and CH485

R410A, 50 Hz

Содержание CH290

Страница 1: ...www danfoss com Application Guide Scroll compressors CH290 and CH485 R410A 50 Hz...

Страница 2: ...a 12 Starting sound level 12 Running sound level 12 Stopping sound level 12 Sound generation in a refrigeration or air conditioning system 12 Operating enevlope data 14 High and low pressure protectio...

Страница 3: ...fic application recommendations 36 Reduce moisture in the system 39 Assembly line procedure 40 Commissioning 44 Dismantle and disposal 45 Packaging 46 Single pack 46 Industrial pack 46 Ordering 47 Sin...

Страница 4: ...coustic hoods 50 Terminal boxes covers and T block connectors 50 Miscellaneous 51 Updates 52 Online support 53 Scroll compressors CH290 and CH485 Contents Danfoss Climate Solutions 2022 09 AB236986442...

Страница 5: ...ess The centre of the orbiting scroll in grey traces a circular path around the centre of the fixed scroll in black This movement creates symmetrical compression pockets between the two scroll element...

Страница 6: ...coustic level R410A optimized and dedicated scroll profile Liquid slug protection per suction fitting in upper position Cut away CH290 and CH485 CH range is composed of CH290 CH485 large commercial pl...

Страница 7: ...e available as single compressor The example below presents the compressor nomenclature which equals the technical reference as shown on the compressor nameplate Code numbers for ordering are listed s...

Страница 8: ...11 1991 2011 B February B 1992 2012 C March C 1993 2013 D April D Wuqing China 25 1994 2014 E May E 1995 2015 F June F 1996 2016 G July G 1997 2017 H August H 1998 2018 J September J 1999 2019 K Octob...

Страница 9: ...uffer a temperature glide during phase change that lessens thermal efficiency and makes them difficult to transfer from a container to another Reduced refrigerant mass flow permitted by a higher heat...

Страница 10: ...lester oil POE is miscible with HFC s while mineral oil is not but has to be evaluated regarding lubrication ability in compressors POE oil has better thermal stability than refrigerant mineral oil PO...

Страница 11: ...5 0 1 Displacement at nominal speed 2900rpm at 50 Hz 2 Net weight with oil charge 1 Displacement at nominal speed 2900rpm at 50 Hz 2 Net weight with oil charge NOTE TR Ton of Refrigeration COP Coeffic...

Страница 12: ...own and thus prevents the compressor from running backwards This reduces the stopping sound to a metallic click caused by the closing valve When the pressure difference or gas flow at shut down should...

Страница 13: ...grommets have been properly mounted vibrations transmitted from the compressor base plate to the unit are held to a strict minimum In addition it is extremely important that the frame supporting the m...

Страница 14: ...3 Application envelope for CH290 Condensing temperature C Evaporating temperature C Evaporating temperature F Condensing temperature F 40 35 30 25 20 15 10 5 0 5 10 15 20 25 30 40 31 22 13 4 5 14 23...

Страница 15: ...low for vacuum operations of the compressor LP switch settings for pump down cycles with automatic reset are also listed in the table below Table 7 Pressure settings Pressure settings R410A Working pr...

Страница 16: ...187 214 531 5 1 2 345 4 279 4 195 304 8 370 8 212 109 428 19 D 1 1 8 S 1 5 8 170 60 CC 000050 Discharge Suction for details about Flexible rubber grommet refer to Figure 13 Rubber grommets Scroll comp...

Страница 17: ...214 76 6 92 5 531 5 345 4 195 170 304 8 370 8 353 212 109 183 60 60 428 279 4 19 CC 000051 NOTE All dimensions are in mm Discharge Suction for details about Rigid spacer refer to Figure 11 Rigid spac...

Страница 18: ...6 195 D 1 3 8 S 1 5 8 333 2 318 1 725 8 667 215 302 187 19 CC 000053 NOTE All dimensions in mm Discharge Suction for details about Flexible rubber grommet refer to Figure 13 Rubber grommets Scroll co...

Страница 19: ...3 8 524 8 19 76 6 345 4 279 4 218 6 212 356 195 109 183 60 60 428 304 8 370 8 92 5 CC 000054 NOTE All dimensions in mm Discharge Suction for details about Rigid spacer refer to Figure 11 Rigid spacers...

Страница 20: ...ting come delivered with rigid mounting spacers for parallel mounting CH290 and CH485 used in single applications are delivered with flexible grommets The grommets must be compressed until contact bet...

Страница 21: ...ed so as not to trap oil and to prevent oil and refrigerant migration back to the compressor during off cycles In systems with R410A the refrigerant mass flow will be lower compared to R22 R407C syste...

Страница 22: ...or the suction riser must be trapped so as to prevent liquid refrigerant from collecting at the outlet of the evaporator while the system is idle which would mislead the expansion valve s sensor therm...

Страница 23: ...cooled coils For all evaporator types a special care is required for superheat control leaving the evaporator and oil return A sub cooler circuit in the condenser that creates high sub cooling will i...

Страница 24: ...essary If not the electronic protection module may not operate properly Any compressor damage related to this will not be covered by Danfoss warranty In the same manner cables must be selected in a wa...

Страница 25: ...7 Winding resistance is generally low and it requires adapted tools for precise measurement Use a digital ohm meter a 4 wires method and measure under stabilised ambient temperature Winding resistance...

Страница 26: ...operate properly in a single direction and the motor is wound so that if the connections are correct the rotation will also be correct Compressor model CH290 CH485 are delivered with an electronic mo...

Страница 27: ...everal phases which in turn leads to overheating and possible motor damage Voltage imbalance is given by the formula voltage imbalance Vavg V1 2 Vavg V1 3 Vavg V2 3 2 Vavg 100 Mean voltage of phases 1...

Страница 28: ...sors are designed as 100 suction gas cooled without need for additional fan cooling Ambient temperature has very little effect on the compressor performance High ambient temperature In case of enclose...

Страница 29: ...to water heat pumps the discharge temperature must be monitored during development test by the equipment manufacturer The DGT should be set to open at a discharge gas temperature of 135 C The compres...

Страница 30: ...setting bar g 46 1 Minimum low pressure safety switch setting 1 bar g 1 5 Minimum low pressure pump down switch setting 2 bar g 2 15 1 LP safety switch shall never be bypassed and shall have no time d...

Страница 31: ...migration Depending on the amount of migration graduate measures shall be taken Sump heater Liquid line solenoid valve Pump down cycle Sump heater The surface sump heaters are designed to protect the...

Страница 32: ...set lower than 2 15 bar g For suggested wiring diagrams please see section Suggested wiring diagrams logic Tests for pump down cycle approval As the pump down switch setting is inside the application...

Страница 33: ...ed Required No test or additional safeties required NOTE For special conditions such as low ambient temperature low refrigerant load or brazed plate heat exchangers please refer to corresponding secti...

Страница 34: ...n line Power supply and electrical protection Wiring information Requirements The wiring diagrams below are examples for a safe and reliable compressor wiring In case an alternative wiring logic is ch...

Страница 35: ...B F1 F1 HP L1 L3 L2 KM T2 M T1 T3 DGT UC SSH Danfoss WD 00001 Figure 25 Compressor model CH485 CC SS LPS KM F1 F1 HP L1 L3 L2 KM DGT MPM CB UC M S SSH T2 T1 T3 Danfoss WD 00002 Danfoss Climate Solutio...

Страница 36: ...ion and discharge pressures to force the orbiting scroll down against the oil film on the thrust bearing Anything less than this differential and the orbiting scroll can lift up causing a metal to met...

Страница 37: ...onsequently the heat exchanger offers very little internal volume for the compressor to draw vapour from on the suction side The compressor can then quickly enter into a vacuum condition It is therefo...

Страница 38: ...ssive temperatures Operating the compressor at too high discharge temperatures can result in mechanical damage to the compressor as well as thermal degradation of the compressor lubricating oil and a...

Страница 39: ...In such cases a suction accumulator becomes mandatory Water utilizing systems Apart from residual moisture in the system after commissioning water could also enter the refrigeration circuit during ope...

Страница 40: ...Maximum inclination from the vertical plane while operating must not exceed 3 degrees Handling Each Danfoss CH scroll compressor is equipped with two lift rings on the top shell Always use both these...

Страница 41: ...ny other substances within the system will not improve performance and in most cases will be highly detrimental to system operations The presence of non condensable substances and system contaminants...

Страница 42: ...brass or steel the use of silver solder 5 or more and anti oxidant flux is necessary Please contact Danrfoss Technical support for any deviation from this guidelines Compressor connection When brazing...

Страница 43: ...tmospheric level For more detailed information on the appropriate materials required for brazing or soldering please contact the product manufacturer or distributor For specific applications not cover...

Страница 44: ...non starting compressor When servicing always ensure that LP HP pressures are balanced before starting the compressor Be sure to follow all government regulations regarding refrigerant reclamation an...

Страница 45: ...ght glass The presence of foam filling in the sight glass indicates large concentration of refrigerant in the oil and or presence of liquid returning to the compressor The oil level can also be checke...

Страница 46: ...485 760 600 900 189 Industrial pack Figure 31 Industrial pack Compressor model Compressors per pack Length Width Height Gross weight Static stacking pal lets mm mm mm kg CH290 6 1150 965 768 702 2 CH4...

Страница 47: ...120H1484 1 Electronic motor protection module located in terminal box 1 Electronic motor protection module located in terminal box Parallel usage Model Packaging Connections Mounting feet Motor protec...

Страница 48: ...1 3 4 Models with 1 3 4 rotolock connection Multipack 10 7956003 Gasket 1 3 4 Models with 1 3 4 rotolock connection Industry pack 50 8156133 Gasket 2 1 4 Models with 2 1 4 rotolock connection Multipac...

Страница 49: ...kaging Pack size 7703383 Valve set V03 2 1 4 1 5 8 V02 1 3 4 1 1 8 CH290 CH485 Multipack 4 Motor protection modules Table 22 Motor protection modules Code no Description Application Packaging Pack siz...

Страница 50: ...ngle pack 12 120Z0571 POE lubricant 2 5 litre can Single pack 4 Acoustic hoods Table 27 Acoustic hoods Code no Description Application Packaging Pack Size 120Z0022 Acoustic hood for scroll compressor...

Страница 51: ...4 8156129 Gasket for oil sight glass 1 1 8 white teflon Multipack 10 7956005 Gasket for oil sight glass 1 1 8 white teflon Multipack 50 8154001 Danfoss Commercial Compressors blue spray paint Single...

Страница 52: ...List of changes Reason for change 2022 09 AB236986442743en 000501 Layout of document changed 2018 07 AB236986442743en 000401 2017 06 AB236986442743en 000301 Scroll compressors CH290 and CH485 Updates...

Страница 53: ...er understand the products applications industry topics and trends that will help you do your job better Create your Danfoss Learning account for free at www danfoss com en service and support learnin...

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