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