A: Modelnumber
B: Serialnumber
C: Refrigerant
D: Supplyvoltage&Lockedrotorcurrent
E: Housingservicepressure
F: Factorychargedlubricant
G: Compressorfrequency&MaxMusttripcur-
rent
Thecompressormustonlybeusedforitsdesigned purpose(s) and within its scope ofapplication(referto«operatinglimits»).ConsultApplicationguidelinesanddatasheetavailablefromhttp://cc.danfoss.com
Under all circumstances,theEN378(orotherapplicablelocal safety regulation)requirements must befulfilled.
The compressor is delivered undernitrogen gas pressure (between 0.3and 0.7 bar) and hence cannot beconnectedasis;refertothe«assem-bly» sectionforfurtherdetails.
The compressor must behandled with caution in thevertical position (maximumoffsetfromthevertical:15°)
E
F
C
D
A
B
G
15
20
25
30
35
40
45
50
55
60
65
70
-30 -25 -20 -15 -10 -5 0 5 10 15 20
30 - 90 HzT C(°
C)
T0 (°C)
50 -
90 H
z
50 - 90 Hz
SH=6KOilinjectioncontrolvalve
Oilinjectioncontrolassembly
Oilinjectioncontroldismantling
Removetheclip-oncoilbyusingascrew
driver.
FRCC.EI.005.A3.02©DanfossCommercialCompressors09/101
220V
2 A max
Puttheclip-oncoil(1)withthegasket(2)over
thevalvebody(3)onthecompressor
4 5 63 2 1
Attachtheconnector(4)tothecoilusingthe
deliveredaccessories(5)and(6).
Wiretheconnectorasindicated.
InstruCtIonsVsH ComprEssors
r410A
2 FRCC.EI.005.A3.02©DanfossCommercialCompressors09/10
Basic connections
- Depending on the frequency converter
version, the physical position of individual
connectorsmaydifferfrombelowdiagram.
- Alwaysmakesurethatthecompressortermi-
nalsT1,T2,T3areconnectedtothefrequency
converterterminals96,97,98respectively.
- Thecompressormotorcablemustbeshielded
andthearmouredpartmustbeconnectedto
groundonbothcableends;atthesideofthe
compressor and at the side of the frequency
converter.
- UseanEMCcableglandforcableinstallationand
perfectgrounding;Themetallicterminalboxof
thecompressorhasapaint-freesurfacearound
theconnectionholeforbetterconductivity.
- A low pressure safety switch is mandatory to avoid compressor vacuum operation.
- Atstart-up,verfiythatthecompressorrotates
intherightdirectionandpumps.
230 V~
2 A maxRE
LAY
1
L1 91 L1 W 98 T3L2 92 L2 V 97 T2L3 93 L3 U 96 T1
95 PE PE 99
39 39 Ana out COM42 42 Ana out +50 50 Ana in +10 V NC 0353 53 Ana in 0 ± 10 V NO 0254 54 Ana in 0 ± 10 V COM 0155 55 Ana in COM
NC 06NO 05
12 12 +24V COM 0413 13 +24V18 18 Dig in19 19 Dig in27 27 Dig in/out29 29 Dig in/out32 32 Dig in N- RS485 69 6933 33 Dig in P+ RS485 68 6820 20 Dig in COM COM RS485 61 6137 37 Dig in
RE
LAY
2CDS3
02Legends:Ana: Analogue
Dig: Digital
in: Input
out: Output
COM: Common
NC: Normally-closed
NO: Normally-open
Openloop Processloop91,92,93: 3Phasemainsinput X X95: Earth X X39,42 Analogueoutput - -50: Analogueinput - -53: PLC+(0to10V) X -54: Sensor- - X55: PLC- X -12: HP/LPswitch X X12: ExternalOn/Off(NO) X X13: Factorybridgedto37 X X13: Sensor+ - X18: ExternalOn/Off(NO) X X19: Digitalinput - -27: HP/LPswitch(NC)/safetydevices X X29: Digitalinput/output - -32,33 Digitalinput - -20: DigitalinputCommon - -37: Factorybridgedto13 X X98: TocompressorterminalT3 X X97: TocompressorterminalT2 X X96: TocompressorterminalT1 X X99: Tocompressorearthconnection X X02,01: Relay1tooilsolenoidvalve X X06,05,04: Relay2 - -69,68: RS485Bus - -61: RS485BusCommon - -
- Optionalconnection X :Mandatoryconnection
TheCDS302frequencyconverterisfactorypre-
set with parameters for the open loop control
principle. The process loop control principle
canbeselectedbychangingparametersinthe
«Quickmenu».
Open loop:0-10Vcontrol
Frequencyconverterinslavemode
Process loop:
4-20mAcontrol
FrequencyconverterunderownPIDcontroller
Instructions
1-IntroductionThese instructions pertain to the VSH VariableSpeedscrollcompressorsusedforA/Csystems.They provide necessary information regardingsafetyandproperusageofthisproduct.
2–Handlingandstorage • Handle the compressor with care. Use the
dedicatedhandlesinthepackaging.Usethecompressor lifting lug and use appropriateandsafeliftingequipment.
• Store and transport the compressor in anuprightposition.
• Storethecompressorbetween-35°Cand55°C. • Don’texposethecompressorandthepacka-
gingtorainorcorrosiveatmosphere.
3–SafetymeasuresbeforeassemblyNeverusethecompressorinaflammable
atmosphere.
• The compressor ambient temperature maynotexceed50°Cduringoff-cycle.
• Mount the compressor on a horizontal flatsurfacewithlessthan3°slope.
• The compressor can only be supplied by afrequencyconverter.Makesurethatthefrequencyconverteristhededicatedoneforthecompressor(power size and voltage: input & output).Parameter1.13ofthefrequencyconverterliststhepossiblecombinationsofcompressors,frequencyconvertersandrefrigerants.
• WheninstallingaVSH,useequipmentspecifi-callyreservedforHFCrefrigerantswhichwasneverusedforCFCrefrigerants.
• Usecleananddehydratedrefrigeration-gradecoppertubesandsilveralloybrazingmaterial.
• Usecleananddehydratedsystemcomponents. • Thepipingconnectedtothecompressormustbe
flexiblein3dimensionstodampenvibrations. • Makesuretheinstallationisequippedwithhigh-
pressuresafetycomponents(e.g.pressureswitch,pressurereliefvalve)topreventagainsttheburs-tingofpressure-containingcomponents.
4-Assembly • Slowly release the nitrogen holding charge
throughtheschraderport. • Connect the compressor to the system as
soon as possible to avoid oil contaminationfromambientmoisture.
• Avoidmaterialenteringintothesystemwhilecutting tubes. Never drill holes where burrscannotberemoved.
• Brazewithgreatcareusingstate-of-the-arttech-niqueandventpipingwithnitrogengasflow.
• Connect the required safety and control de-vices.Whentheschraderportisusedforthis,removetheinternalvalve.
5–Leakdetection Never pressurize the circuit with oxygen or
dryair.Thiscouldcausefireorexplosion.
• Donotusedyeforleakdetection. • Performaleakdetectiontestonthecomplete
system. • Thelowsidetestpressuremustnotexceed30bar. • Whenaleakisdiscovered,repairtheleakand
repeattheleakdetection.
6–Vacuumdehydration • Neverusethecompressortoevacuatethesystem. • ConnectavacuumpumptoboththeLP&HPsides. • Evacuatethesystemtoapressureof500µm
Hg(0.67mbar)absolute. • Donotuseamegohmmeternorapplypower
tothecompressorwhileitisundervacuumasthismaycauseinternaldamage.
7–Electricalconnections • Switchoffandisolatethemainpowersupply.
Seepreviouspageforwiringdetails. • The compressor is protected against excess
currentbythefrequencyconverter.Followlocalregulations regarding power line protection.Thecompressormustbeconnectedtoground.
• Allelectricalcomponentsmustbeselectedasperlocalstandardsandcompressorrequirements.
• Pleaserefertodrawingsfortypicalwiringconnec-tions and examine the specific wiring diagramlocatedinthefrequencyconverterpackage.Forfurtherdetails,refertotheapplicationguidelines.
• Followverycloselytheinstallationinstructionforthefrequencyconverter:
-Mounting:Thebaseframeofthefrequencyconverter must be very well fixed to thesupport to ensure a very good continuitybetweenthegroundpotentialofallelectricalpanelsandelectricalboxesofthesystem.
-Wiring:Allcontrolwireshavetobeofascreee-neddesign.Thecableforelectricalmotorsup-plyhastobeofashieldeddesignaswell.Cor-rectearthingoftheshieldcoverhastobedoneusingthemethodshownondrawings,everytimethisonehastobeearthedoneachendofthecables.Distinctcabletraysmustbeusedforcontrolandmotorsupply.
• The frequency converter ensures direct motorprotection and the factory set parameters aresuchtoprotect themotoroverallcurrentmal-functions.Anexternaloverloadisnotnecessary.
• Set the frequency converter parameters inaccordance with Danfoss recommendationsfortheCDS302frequencyconverterandVSHvariablespeedcompressor.
8–Fillingthesystem • Keepthecompressorswitchedoff. • Fill the refrigerant in liquid phase into the
outletsideofthecondenserorliquidreceiver.Thechargemustbeascloseaspossibletothenominalsystemchargetoavoidlowpressureoperationandexcessivesuperheat.
Compressor Refrigerantchargelimit(kg)VSH088 5.9VSH117 7.9VSH170 13.5
Abovethislimit;protectthecompressoragainstliquidflood-backwithapump-downcyclenotlowerthan2.3bar(g)orasuctionlineaccumu-lator.
• Never leavethefillingcylinderconnectedtothecircuittoavoidoverfilling.
9–Verificationbeforecommissioning Use safety devices such as safety pressure
switchandmechanicalreliefvalveincomplian-cewithbothgenerallyandlocallyapplicablere-gulationsandsafetystandards.Ensurethattheyareoperationalandproperlyset.
Checkthatthesettingsofhigh-pressureswit-chesandreliefvalvesdon’texceedthemaximumservicepressureofanysystemcomponent.
• Alow-pressureswitchismandatorytoavoidva-cuumoperation.Minimumsetting1.5bar(g).
• Verifythatallelectricalconnectionsareproperlyfastened and in compliance with local regula-tions.
• A crankcase heater is not required. Thisfunction is integrated in the CDS302 whichprovides a calibrated DC current during offcyclestoheattheelectricalmotor.TheCDS302mustbeenergizedatleast12hoursbeforeini-tialstart-upandafterprolongedshutdown.
• Aftercomissioningitisstronglyrecommendedtokeepthefrequencyconverteralwaysenergized.
10–Start-up • Allservicevalvesmustbeintheopenposition. • BalancetheHP/LPpressure. • Energizethecompressor.Itmuststartpromptly. • If thecompressordoesn’tstart,verify that the
compressor is hooked up to the frequencyconverter;checkthepowerleadconnections.If these verifications reveal no abnormality,checkthemotorwindingswithanohmmeter.
• Check the frequency converter control pa-nel:Ifanyalarmisdisplayedcheckthewiringand in particular the polarity of the controlcables. Ifanalarm is shown, refer to the fre-quency converter application manual.Verifyinparticularthecombinationofcompressor,frequencyconverterandrefrigerant.
• Checkcurrentdrawandvoltagelevelsonthemains. The values for the compressor elec-tricalmotorcanbedirectlydisplayedonthefrequencyconvertercontrolpanel.
• Theoptimumcompressorsuctionsuperheatis around 6K. The maximum allowed super-heatis30K.
11–Checkwithrunningcompressor • Checkcurrentdrawandvoltage. • Check suction superheat to reduce risk of
slugging. • Observetheoillevelatstartandduringopera-
tiontoconfirmthattheoillevelremainsvisible.Excessfoaminginoilsightglassindicatesrefri-gerantonthesump.
• Monitortheoilsightglassfor1houraftersys-temequilibriumtoensureproperoilreturntothecompressor.Thisoilcheckhastobedoneoverthespeedrangetoguarantee:
-agoodoilreturnatlowspeedwithmini-mumgasvelocity.
- a good oil management at high speedwithmaximumoilcarryover.
• Respecttheoperatinglimits. • Checkalltubesforabnormalvibration.Move-
mentsinexcessof1.5mmrequirecorrectivemeasuressuchastubebrackets.
• Whenneeded,additionalrefrigerantintheliquidphasemaybeaddedinthelow-pressuresideasfaraspossiblefromthecompressor.Thecompressormustbeoperatingduringthisprocess.
• Donotoverchargethesystem. • Neverreleaserefrigeranttotheatmosphere. • Before leaving the installation site, carry out
a general installation inspection regardingcleanliness,noiseandleakdetection.
• Record type and amount of refrigerant chargeaswellasoperatingconditionsasareferenceforfutureinspections.
• Compressorfailuretobuilduppressure:Checkall bypass valves in the system to ensure thatnoneofthesehasbeenopened.Alsocheckthatallsolenoidvalvesareintheirproperposition.
• Abnormalrunningnoise:Ensuretheabsenceofanyliquidflood-backtothecompressorbymeansofmeasuringthereturngassuperheatandcom-pressorsumptemperature.Thesumpshouldbeatleast6Kabovethesaturatedsuctiontempera-tureundersteady-stateoperatingconditions.
• The high-pressure switch trips out: Checkcondenseroperations(condensercleanliness,fanoperation,waterflowandwaterpressurevalve,waterfilter,etc.).IfalltheseareOK,theproblem may be due to either refrigerantovercharging or the presence of a non-con-densable(e.g.air,moisture)inthecircuit.
• Thelow-pressureswitchtripsout:Checkevapo-ratoroperations(coilcleanliness,fanoperations,water flow, water filter, etc.), liquid refrigerantflow and pressure drops (solenoid valve, filterdryer,expansionvalve,etc.),refrigerantcharge.
• Low refrigerant charge: The correct refrigerantchargeisgivenbytheliquidsightglassindication,the condenser deltaT in relation to the refrige-rant pressure tables (pressure-temperature), thesuperheatandthesub-cooling,etc.(ifadditional
FRCC.EI.005.A3.02©DanfossCommercialCompressors09/10 3
Instructions
chargeisdeemednecessary,refertosection8).
• Compressorshortcycling:Thenumberofcy-
clesshallneverexceed12startsperhour.
12-Maintenance
Internal pressure and surface temperature
aredangerousandmaycausepermanentinjury.
Maintenance operators and installers require
appropriate skills and tools. Tubing and com-
presssor upper shell temperature may exceed
100°Candcancausesevereburns.
Ensure that periodic service inspections to
ensuresystemreliabilityandasrequiredbylocal
regulationsareperformed.
Topreventsystemrelatedcompressorproblems,
followingperiodicmaintenanceisrecommended:
• Verifythatsafetydevicesareoperationaland
properlyset.
• Ensurethatthesystemisleaktight.
• Checkthecompressorcurrentdraw.
• Confirmthatthesystemisoperatinginaway
consistent with previous maintenance re-
cordsandambientconditions.
• Check that all electrical connections are still
adequatelyfastened.
• Keepthecompressorcleanandverifytheab-
senceofrustandoxidationonthecompres-
sorshell,tubesandelectricalconnections.
• Check the internal temperature of the fre-
quencyconverteronitsdisplayandthecoo-
lingairflow.
• Faultsareloggedinthefrequencyconverter
memoryandcanbedisplayed.Thiscanhelp
to evaluate and improve parameters of the
frequencyconverterorofthesystemitself.
13-Warranty
Alwaystransmitthemodelnumberandserialnum-
berwithanyclaimfiledregardingthisproduct.
Usethefaultmemoryofthefrequencyconver-
ter to recover the fault descriptions before ini-
tializingthesystemandevenbeforeshuttingoff
thepower.
Theproductwarrantymaybevoidinfollowing
cases:
• Absenceofnameplate.
• External modifications; in particular, drilling,
welding,brokenfeetandshockmarks.
• Compressoropenedorreturnedunsealed.
• Rust, water or leak detection dye inside the
compressor.
• Useofarefrigerantorlubricantnotapproved
byDanfoss.
• Any deviation from recommended instruc-
tionspertainingtoinstallation,applicationor
maintenance.
• Useinmobileapplications.
• Useinexplosiveatmosphericenvironment.
• Nomodelnumberorserialnumbertransmit-
tedwiththewarrantyclaim.
14–Disposal
Danfossrecommendsthatcompressors,frequen-
cy converters and compressor oil should
berecycledbyasuitablecompany.
DanfossCommercialCompressorshttp://cc.danfoss.comDanfosscanacceptnoresponsibilityforpossibleerrorsincatalogues,brochuresandotherprintedmaterial.Danfossreservestherighttoalteritsproductswithoutnotice.Thisalsoappliestoproductsalreadyonorderprovidedthatsuchalterationscanbemadewithoutsubsequentialchangesbeingnecessaryinspecificationsalreadyagreed.Alltrademarksinthismaterialarepropertyoftherespectivecompanies.DanfossandtheDanfosslogotypearetrademarksofDanfossA/S.Allrightsreserved.
FRCC.EI.005.A3.02-Sept.2010 CopyrightDanfossCommercialCompressors-09/10
Instructions