A2B Accorroni HPE Series Use and care manual

User’s and Installer’s Manual
HPE 06÷15 INVERTER
Chillers and inverter air/water heat pumps
with axial fans
HPE 06÷15 INVERTER

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0309‐2013A.M.G.M.
0207‐2013D.P.G.M.
0105‐2013D.P.G.M.
0005‐2013D.P.G.M.
RevDateAuthorSupervisor
Catalogo/Catalogue/Katalog/Catalogue
MUI14124D5820‐03
Serie/Series/Serie/Serie/Série
USER’SANDINSTALLER’SMANUALFORCHILLERSANDINVERTER
AIR/WATERHEATPUMPSWITHAXIALFANS
Possiblewastedelectricalorelectronicdevices/productsshouldnotbelocatedtogetherwithnormaldomesticwaste,butdisposedaccordingtothe
currentWEEElawincompliancewiththeEuropeanDirective2002/96/ECandfollowingmodifications2003/108/EC.Pleaseinformyourselfatyour
localAdministrationoratyourresellerincasetheproductwillbereplacedwithasimilarone.

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INDEX
1AIMANDCONTENTSOFTHISMANUAL .............................................................................................................................. 5
1.1HOWTOKEEPTHISMANUAL ................................................................................................................................................. 5
1.2GRAPHICSYMBOLS................................................................................................................................................................. 5
2SAFETYLAWS..................................................................................................................................................................... 5
3PERMITTEDUSES................................................................................................................................................................ 5
4GENERALSAFETYGUIDELINES ............................................................................................................................................ 6
4.1WORKERS’HEALTHANDSAFETY ............................................................................................................................................ 6
4.2PERSONALSAFETYEQUIPMENTS ........................................................................................................................................... 6
4.3SAFETYSYMBOLS.................................................................................................................................................................... 6
4.4REFRIGERANTSAFETYDATASHEET ........................................................................................................................................ 7
5TECHNICALCHARACTERISTICS ............................................................................................................................................ 8
5.1FRAME.................................................................................................................................................................................... 8
5.2REFRIGERANTCIRCUIT ........................................................................................................................................................... 8
5.3COMPRESSORS....................................................................................................................................................................... 8
5.4AIRSIDEEXCHANGERS............................................................................................................................................................ 8
5.5FANS ....................................................................................................................................................................................... 8
5.6USERSIDEHEATEXCHANGERS ............................................................................................................................................... 8
5.7ELECTRICBOX ......................................................................................................................................................................... 8
5.8CONTROLSYSTEM .................................................................................................................................................................. 8
5.9MONITORINGANDPROTECTIONDEVICES ............................................................................................................................. 9
5.10HYDRAULICCIRCUIT ............................................................................................................................................................... 9
5.11FANSPEEDCONTROL ............................................................................................................................................................. 9
6AVAILABLEVERSIONS......................................................................................................................................................... 9
6.1OPTIONALACCESSORIES ........................................................................................................................................................ 9
7INSTALLATION.................................................................................................................................................................... 9
7.1GENERALITY............................................................................................................................................................................ 9
7.2LIFTINGANDHANDLING....................................................................................................................................................... 10
7.3LOCATIONANDMINIMUMTECHNICALCLEARANCES .......................................................................................................... 10
7.4HYDRAULICCONNECTIONS .................................................................................................................................................. 10
7.4.1Drainageconnection .................................................................................................................................................... 10
7.4.2Servicevalve ................................................................................................................................................................. 11
7.4.3Plantdrainagesystem.................................................................................................................................................. 11
7.4.4Hydrauliccircuit............................................................................................................................................................ 11
7.5REFRIGERANTDIAGRAM ............................................................................................................................................................. 12
7.6ELECTRICALCONNECTIONS .................................................................................................................................................. 12
7.6.1WIRINGTERMINALBLOCK............................................................................................................................................ 12
8STARTUP ..........................................................................................................................................................................14
9USER‐CONTROLINTERFACE..............................................................................................................................................15
9.1SETPOINTADJUSTABLEBYTHEUSER ................................................................................................................................... 15
9.2DISPLAY ................................................................................................................................................................................ 15
9.3LED ....................................................................................................................................................................................... 15
9.4DYNAMICSET‐POINTADJUSTING......................................................................................................................................... 16
9.50‐10VANALOGINPUTFORSET‐POINTREGULATION ........................................................................................................... 16
9.6HYDRAULICPUMPOPERATION ............................................................................................................................................ 17
9.6.1OPERATIONBYTHERMOREGULATOR(Default) ........................................................................................................... 17
9.6.2OPERATIONBYTHERMOREGULATORWITHPERIODICACTIVATION............................................................................ 18
9.6.3CONTINUOUSOPERATION ........................................................................................................................................... 18
9.7ANTIFREEZEPROTECTIONRESISTANCES(IFTHEKAACCESSORYISPRESENT) ...................................................................... 19
9.8ON/OFFREMOTECONTROLANDSUMMER/WINTERMODES.............................................................................................. 19
9.9SANITARYVALVEADJUSTMENT............................................................................................................................................ 19
9.10ACTIVATIONOFSANITARYHOTWATERPRODUCTIONBYDIGITALINPUT ........................................................................... 19
9.11HEATINGMODEONSANITARYACCUMULATION ................................................................................................................. 21

9.12 AUXILIARY ELECTRIC HEATERS OF THE SYSTEM ....................................................................................................................21
9.13 AUXILIARY ELECTRIC HEATER OF SANITARY WATER..............................................................................................................21
9.14 SELECTION MODE OF AUXILIRY ELECTRIC HEATERS..............................................................................................................21
9.15 ACTIVATION OF THE AUXILIARY ELECTRIC HEATERS DURING THE JOINT/IN SUBSTITUTION OPERATION TO THE
COMPRESSOR ...................................................................................................................................................................................21
9.16 INDICATION ON SUMMER/WINTER OPERATION. .................................................................................................................22
9.17 TABLES OF CONFIGURATIONS ALLOWED TO USER AND INSTALLER......................................................................................23
9.17.1 Table of configurations................................................................................................................................................. 23
9.18 ALARMS................................................................................................................................................................................ 24
9.18.1 Water flow switch......................................................................................................................................................... 24
9.18.2 High temperature ......................................................................................................................................................... 24
9.18.3 Anti‐freezing ................................................................................................................................................................. 25
9.18.4 Sensors alarm ............................................................................................................................................................... 25
9.18.5 Timeout inverter ........................................................................................................................................................... 25
9.18.6 ON/OFF remote ............................................................................................................................................................ 25
9.18.7 High pressure................................................................................................................................................................ 25
9.18.8 High pressure flow switch (in series with the compressor outlet probe)....................................................................... 25
9.18.9 Low pressure................................................................................................................................................................. 25
9.19 POWER FAILURE ................................................................................................................................................................... 25
9.20 USER BLOCK ALLARMS TABLE........................................................................................................................................................ 25
10 SHUTDOWNS FOR LONG PERIODS .......................................................................................................................................... 25
11 MAINTENANCE AND PERIODICAL CONTROLS ......................................................................................................................... 26
11.1 ENVIRONMENTAL PROTECTION ........................................................................................................................................... 26
12 WHEN THE UNIT GOES OUT OF SERVICE ................................................................................................................................. 26
13 TECHNICAL DATA ..................................................................................................................................................................... 27
14 ELECTRIC DATA OF THE UNIT AND AUXILIARIES ..................................................................................................................... 28
15 HEAT PUMPS AVAILABLE HEAD PRESSURE ............................................................................................................................. 28
15.1 MODELS HPE 06.................................................................................................................................................................... 28
15.2 MODELS HPE 09.................................................................................................................................................................... 28
15.3 MODELS HPE 12.................................................................................................................................................................... 29
15.4 MODELS HPE 15.................................................................................................................................................................... 29
16 WATER PUMP CURVES ............................................................................................................................................................ 30
16.1 MODELS HPE 06‐09............................................................................................................................................................... 30
16.2 MODELS HPE 12‐15............................................................................................................................................................... 30
17 OPERATING LIMITS .................................................................................................................................................................. 31
17.1 EVAPORATOR WATER FLOW RATE........................................................................................................................................ 31
17.2 COLD WATER TEMPERATURE (SUMMER OPERATION) .........................................................................................................31
17.3 HOT WATER TEMPERATURE (WINTER OPERATION) .............................................................................................................31
17.4 AMBIENT AIR TEMPERATURE ...............................................................................................................................................31
18 CORRECTION FACTORS FOR USE OF GLYCOL .......................................................................................................................... 32
19 DIMENSIONS............................................................................................................................................................................ 32
19.1 MODELS HPE 06.................................................................................................................................................................... 32
19.2 MODELS HPE 09.................................................................................................................................................................... 32
19.3 MODELS HPE 12‐15............................................................................................................................................................... 33
20 WIRING DIAGRAMS ................................................................................................................................................................. 34
20.1 MODELS HPE 06 ‐09.............................................................................................................................................................. 34
20.2 MODELS HPE 12.................................................................................................................................................................... 35
20.3 MODEL HPE 15...................................................................................................................................................................... 36
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21 CR REMOTE KEYBOARD (OPTIONAL ACCESSORY)................................................................................................................... 37
21.1 CONNECTION OF THE CRH KEYBOARD TO THE MINICHILLER................................................................................................37
22 DOUBLE SET‐POINT KIT (OPTIONAL ACCESSORY) ................................................................................................................... 37
22.1 PURPOSE AND SCOPE ........................................................................................................................................................... 37
22.2 PARTS AND TECHNICAL CHARACTERISTICS OF THE KIT .........................................................................................................37
22.3 FUNCTIONS OF HUMIDISTAT ................................................................................................................................................38
22.4 SETTING OF MINICHILLER ..................................................................................................................................................... 38
22.5 NOTES FOR INSTALLATION.................................................................................................................................................... 38
22.6 ADJUASTABLE SET‐POINT ..................................................................................................................................................... 39
22.7 COMMUTATION ................................................................................................................................................................... 39
22.8 WIRING DIAGRAMS .............................................................................................................................................................. 40
22.8.1 Wiring diagram without external relay connection ......................................................................................................40
22.8.2 Wiring diagram with external relay connection............................................................................................................40
22.9 HUMIDISTAT CONNECTION ..................................................................................................................................................41
22.10 HYDRAULIC DIAGRAM TYPE................................................................................................................................................ 41
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The HPE manual contains all the necessary information for the better use of the equipment under safety conditions for
the operator thus meeting the requirements listed in the 2006/42/CE Equipment Directive and following
amendments.
1AIMANDCONTENTSOFTHISMANUAL
Thismanualprovidesbasicinformationasfortheinstallation,theoperationandthemaintenanceoftheN‐i‐HWAK/WPV2/V2+
units.Itisaddressedtomachineoperatorsanditenablesthemtousetheequipmentefficiently,eveniftheydonothaveany
previousspecificknowledgeofit.
Thismanualdescribesthecharacteristicsoftheequipmentatthetimeitisbeingputonthemarket;therefore,itmaynotcapture
latertechnologicalimprovementsintroducedbyA2B Accorroni E.G.aspartofitsconstantendeavourtoenhancethe
performance,ergonomics,safetyandfunctionalityofitsproducts.
A2B Accorroni E.G.,therefore,isnotconstrainedtoupdatethemanualsforpreviousversionsofmachines.
It’srecommendedthat,theusermustfollowtheinstructionscontainedinthisbooklet,especiallythoseconcerningthesafetyand
routinemaintenance.
1.1 HOWTOKEEPTHISMANUAL
Themanualhastobealwayskeptwiththeunititrefersto.Ithastobestoredinasafeplace,awayfromthedustandmoisture.It
hastobeaccessibletoalluserswhoshallconsultitanytimetheyareindoubtonhowtooperatetheequipment.
A2B Accorroni E.G.reservestherighttomodifyitsproductsandrelatedmanualswithoutnecessarilyupdatingpreviousversionsof
thereference material. It declines also any responsibility for possible inaccuracies in the manual if due to printing or
transcription errors.
Thecustomershallstoreanyupdatedcopyofthemanualorpartsofitdeliveredbythemanufacturerasanattachmenttothis
manual.
A2B Accorroni E.G.isavailabletogiveanydetailedinformationaboutthismanualandtogiveinformationregardingtheuseand
themaintenanceofitsownunits.
1.2 GRAPHICSYMBOLS
Indicatesoperationsthatcanbedangerousforpeopleand/ordisruptsthecorrectoperationoftheequipment.
Indicatesprohibitedoperations.
Indicatesimportantinformationthattheoperatorhastofollowinordertoguaranteethecorrectoperationofthe
equipmentincompletesafety.
2SAFETYLAWS
A2B Accorroni E.G.’sequipmentsandtheircomponentpartshavebeendesignedincompliancewiththeharmonisedECnormsin
forceandwithotherEuropeanandnationalnormsasrequiredbytheCouncilDirective(2006/42/CEandlateramendments).
Theequipmentsmeetalsothefollowingrequirements:
•UNIENISO121100
•UNIENISO13857
•UNIEN378‐1,378‐2,378‐3and378‐4Rules
•UNIEN12735‐1Rule
•CEIEN60204‐1Rule
•CEIEN61000‐6‐1Rule
•CEIEN61000‐6‐3Rule
•97/23/CE,2006/95/CE,2006/95/CE,2006/95/CE,2006/96/CECommunityDirectives
3PERMITTEDUSES
•Thecompanyexcludesanycontractualandextracontractualliabilitiesfordamagescausedtopersons,animalsorobjects,by
incorrectinstallation,settingandmaintenance,improperuseoftheequipment,andthepartialorsuperficialreadingofthe
informationcontainedinthismanual.
•Theseunitshavebeendesignedonlyforheatingand/orcoolingwater.Anyotherusenotexpresslyauthorizedbythe
manufacturerisconsideredimproperandthereforenotallowed.
•Thelocationoftheplant,thehydraulicandelectricalcircuitsmustbeestablishedbytheplantingdesignerandmusttakeinto
accountbothtechnicalrequirementsaswellasanyapplicablelocallawsandauthorizedspecifications.
•Theexecutionofallworksmustbeperformedbyskilledandqualifiedpersonnel,competentintheexistingrulesindifferent
countries.

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4GENERALSAFETYGUIDELINES
BeforebeginningtooperateonHPEunitseveryuserhastobeperfectlyknowledgeableaboutthefunctionsoftheequipmentand
itscontrolsandhastohavereadandunderstoodtheinformationlistedinthismanual.
It’sstrictlyforbiddentoremoveand/ortamperwithanysafetydevice.
Childrenorunassisteddisabledpersonsarenotallowedtousetheappliance.
Donottouchtheappliancewhenbarefootorpartsofthebodyarewetordamp.
Donotpull,removeortwisttheelectricalcablescomingoutfromtheunit,evenifitisdisconnectedfromthemain
powersupply.
Donotstepwithyourfeetontheappliance,sitdownand/orplaceanytypeofobject.
Donotsprayorpourwaterdirectlyontheunit.
Donotdisposeof,abandonorleavewithinreachofchildrenpackagingmaterials(cardboard,staples,plasticbags,
etc)astheymayrepresentahazard.
Anyroutineornot‐routinemaintenanceoperationshallbecarriedoutwhentheequipmenthasbeenshutdown,
disconnectedfromelectricpowersources.
Donotputneitheryourhandsnorinsertscrewdrivers,spannersorothertoolsintomovingpartsoftheequipment.
Theequipmentsupervisorandthemaintenancemanhastoreceivesuitabletrainingfortheperformanceoftheir
tasksinsafety.
Operatorshavetoknowhowtousepersonalprotectivedevicesandhavetoknowtheaccident‐preventionguidelines
containedinnationalandinternationallawsandnorms.
4.1 WORKERS’HEALTHANDSAFETY
TheEuropeanCommunityhasadoptedanumberofdirectivesonworkplace’shealthandsafety,whichinclude89/391/CEE,
89/686/CEE,89/655/CEE,86/188/CEEand77/576/CEEdirectives.Everyemployershallimplementsuchprovisionsandensure
thatworkersrespectthem:
Donottamperwithorreplacepartsoftheequipmentwithoutthespecificconsentofthemanufacturer.The
manufacturershallhavenoresponsibilitywhatsoeverincaseofunauthorisedoperations.
Usingcomponents,expendablematerialsorsparepartsthatdonotcorrespondtothoserecommendedbythe
manufacturerand/orlistedinthismanualmaybedangerousfortheoperatorsand/ordamagetheequipment
Theoperator’sworkplacehastobekeptclean,tidyandfreefromobjectsthatmaypreventfreemovements.
Appropriatelightingoftheworkplaceshallbeprovidedsoastoallowtheoperatortocarryouttherequired
operationssafely.Poorortoostronglightingcancauserisks.
Ensurethatworkplacesarealwaysadequatelyventilatedandthataspiratorsareworking,ingoodconditionandin
compliancewiththerequirementsofthelawsinforce.
4.2 PERSONALSAFETYEQUIPMENTS
WhenoperatingandmaintainingtheHPEunits,usethefollowingpersonalprotectiveequipments.
Protectiveclothing:Maintenancemenandoperatorshastowearprotectiveclothingthatcomplieswiththebasic
safetyrequirementscurrentlyinforce.Incaseofslipperyfloors,usershavetowearsafetyshoeswithnon‐slipsoles.
Gloves:Duringmaintenanceorcleaningoperationprotectiongloveshavetobeused
Maskandgoggles:Respiratoryprotection(mask)andeyeprotection(goggles)shouldbeusedduring
cleaningandmaintenanceoperations.
4.3 SAFETYSYMBOLS
Theunitfeaturesthefollowingsafetysigns,whichhastobecompliedwith:
Generalhazards
Electricshockhazard
Presenceofmovingorgans
Presenceofsurfacesthatmaycauseinjures

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4.4 REFRIGERANTSAFETYDATASHEET
Name:R410A(50%Difluoromethane(R32);50%Pentafluoroethane(R125).
RISKSINDICATIONS
Majorrisks:Asphyxia
Specificrisks:Therapidevaporationmaycausefreezing.
FIRSTAID
Generalinformations:Nevergiveanythingbymouthtoanunconsciousperson.
Inhalation:Movetofreshair.
Oxygenorartificialrespirationifnecessary.
Donotadministeradrenalineorsimilardrugs.
Eyescontact:Rinsecarefullywithwaterforatleast15minutesandconsultadoctor.
Contactwithskin:Washimmediatelywithplentyofwater.
Takeoffimmediatelythecontaminatedclothing.
FIREPREVENTION
ExtinguishingMedia:Whatever.
Specificrisks:Increaseinpressure.
Specificmethods: Usewaterspraytocoolcontainers
ACCIDENTALRELEASEACTIONS
Personalprecautions:Evacuatepersonneltosafeareas.
Provideadequateventilation.
Usepersonalprotectiveequipment.
Environmentalprecautions:Evaporate.
Cleaningmethod: Evaporate.
HANDLINGANDSTORAGE
Manipulation
Action/technicalprecautions: Providesufficientairexchangeand/orsuctioninworkplaces.
Recommendationsforsafeuse:Donotbreathevaporsoraerosol.
Storage:Closetightlyandstoreinacool,dryandwellventilatedplace.
Storeinoriginalcontainer.Incompatibleproducts:explosive,flammablematerials,Organicperoxide
EXPOSURECONTROL/PERSONALPROTECTION
Controlparameters: AEL(8‐he12‐hTWA)=1000ml/m³foreachofthetwocomponents.
Respiratoryprotection:Forrescueandmaintenanceoperationinstoragetanksuseself‐containedrespiratorapparatus.
Thevaporsareheavierthanairandcancausesuffocationbyreducingoxygenavailableforbreathing.
Eyesprotection: Safetyglasses.
Protectionofhands: Rubbergloves.
Hygienemeasures:Donotsmoke.
PHYSICALANDCHEMICALPROPERTIES
Colour: Colourless.
Odor: Light.
Boilingpoint: ‐52.8°Catatmosphericpressure.
Lightingpoint:Itdoesnotignite.
Density:1.08kg/lat25°C.
Solubilityinwater:Negligible.
STABILITYANDREACTIVITY
Stability: Noreactivitywhenusedwiththeappropriateinstructions.
Materialstoavoid: Highlyoxidizingmaterials.Incompatiblewithmagnesium,zinc,sodium,potassiumandaluminum.
Theincompatibilityismoreseriousifthemetalispresentinpowderedformorifthesurfaceswere,recently,
unprotected.
DecompositionproductsTheseproductsarehalogenatedcompounds,hydrogenfluoride,carbonoxides(CO,CO2),carbonylhalides.
Risks:
TOXICOLOGICALINFORMATION
Acutetoxicity:(R32)LC50/inhalation/4hours/onrat>760ml/l
(R125)LC50/inhalation/4hours/onrat>3480mg/l
Localeffects:ConcentrationssubstantiallyabovetheTLVmaycausenarcoticeffects.
Inhalationofdecomposedproductsofhighconcentrationsmaycauserespiratoryfailure(pulmonaryedema).
Longtermtoxicity:Didnotshowcarcinogenic,teratogenicormutageniceffectsinanimalexperiments.
ECOLOGICALINFORMATION
Globalwarmingpotential1730
GWP(R11=1):
Potentialdepletion0
OzoneODP(R11=1):
Disposalconsiderations:usablewithreconditioning.

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5TECHNICALCHARACTERISTICS
TheHPEwaterchillersandheatpumpsseriesaredesignedforapplicationsinresidentialandcommercialareas,Theseunitsare
extremelyversatileandcanoperateinheatpumpmodewiththeabilityofproducinghotwateratatemperatureof 55°C for
environmental heating and sanitary applications. The INVERTER compressor with brushless DC motor technology, matched
with electronic expansion valve, pump and variable speed blower are generally used for optimizing the power
consumptionandefficientoperationoftherefrigeratingcomponents.
5.1 FRAME
AllHPEunitsaremadeupofhot‐galvanisedthicksheetmetal,paintedwithpolyurethanepowderenamelsat180°Ctoensurethe
bestresistanceagainstatmosphericagents.Theframeisself‐supportingwithremovablepanels.Allscrewsandrivetsforoutdoor
installationsareingalvanizedsteel.
5.2 REFRIGERANTCIRCUIT
TherefrigerantgasusedintheseunitsisR410A.Therefrigerantcircuithasbeenmanufacturedbymeansofinternationalprimary
brandscomponentsandaccordingtotheUNIEN13134Ruleconcerningweldingprocedures.Therefrigerantcircuitincludes:4
wayreversecyclevalve,electronicexpansionvalve,liquidseparator(models09,12and15),liquidreceiver,valvesfor
maintenanceandcontrol,pressuresafetydeviceaccordingtoPEDregulation,pressuretransducerstoaccuratelyadjustthe
evaporatingandcondensingpressures,filtersforthrottlingvalvetoavoiditsclogging.
5.3 COMPRESSORS
TheusedDCinvertercompressorsarearotaryhermetictype(for06and09models)andtwinrotary(forthe12model),scroll(for
the15model)designedtobeusedwithR410refrigerant.Thecompressorsareallsuppliedwithcrankcaseheaterandthermal
overloadprotection.Theyaremountedonarubbermaterialactingasashockabsorbers.
Thecompressorsaremountedinaseparatechamberinordertobeseparatedfromtheairstreamtoreducethenoise.The
crankcaseheaterisalwayspoweredwhenthecompressorisinstand‐by.Theinspectionispossiblethroughthefrontalpanelof
theunitthatallowthemaintenanceofthecompressorseveniftheunitisworking.
5.4 AIRSIDEEXCHANGERS
Theairsideexchangersaremadeupofcopperpipesandaluminiumfins.Thediameterofthecopperpipesis7mmforthemodel
09and5/16”fortheothermodels12and15,thethicknessofthealuminiumfinsis0,1mm.Thetubesaremechanicallyexpanded
intothealuminiumfinstoimprovetheheatexchangefactor.Thegeometryofthesecondensersguaranteealowairsidepressure
dropand,then,theuseoflowrotation(andlownoiseemission)fans.
5.5 FANS
Thefansareaxialtypewithaluminiumaerofoilblades.Theyarestaticallyanddynamicallybalancedandsuppliedcompleteofthe
safetyfanguardaccordingtotheEN60335Rule(safetyforelectricalapparatusofdomesticandsimilaruse).Theyaremountedon
theunitframebyinterpositionofrubbervibrationdampers.TheelectricmotorsareallbrushlessDCtypewith8poles(about
200/1000rpm).Themotorsaredirectlydrivenwithanintegratedthermaloverloadprotection.Theprotectionclassofthemotors
isIPX4.
5.6 USERSIDEHEATEXCHANGERS
TheusersideheatexchangersaremadeupofAISI316stainlesssteelbraze‐weldedplatestype.Theuserheatexchangersare
factoryinsulatedwithflexibleclosecellmaterialandcanbeequippedwithantifreezeheater(KAoptional).Eachheatexchangeris
providedwithatemperaturesensorworkingasantifreezeprotectionthatactivatesthecirculator,eveninthecasewhentheunit
isturnedoffwhentheconditionssetinthecontrollerhavebeenoccurred.
5.7 ELECTRICBOX
TheelectricboxismanufacturedaccordingtoaccordingcurrentEuropeanUnionlaws.Theaccessibilitytotheboardispossible
afterremovingthefront,sideandtoppanelsoftheunit.TheprotectiondegreeisIP24.Theterminalboardissuppliedwith
voltagefreecontactsforremoteON‐OFF,winter/summerchangeover,auxiliaryresistance,sanitarywatertemperaturesensor
controlofexternal3‐wayvalveandfreecontactsforremotecontrolpanelandforthemanagementofthedualsetpointof
operation.
5.8 CONTROLSYSTEM
All HPE units are standard supplied with a microprocessor adopting an overheating control logic program throughthe
electronicexpansionvalvewhichisdrivenbythepressuretransducerssignals.Themicroprocessorisalsocapableofcontrollingthe
followingfunctions:watertemperatureregulation,antifreezeprotection,compressors’timesetting,compressorautomatic
starting sequence, alarm reset, alarm management and operating LED. Upon request, the microprocessor can be connected
toaBMSremotecontrolsystemandtothesimplerHNSsystemwithourterminalunits.Thecontrolsystemtogether

9
with the INVERTER technology and the on board sensors continuously monitor and adapt the performance of the inverter
compressor,ofthepumpandofthefan(2fansasfortheHPE12and15models)accordingtothevalueofcoolingpoweratany
workingconditionsrequestedbytheuser.
TheINVERTERsystemallowtoreducetheplant’swatercontenttotheminimum,thatisfromtheusualvalue12‐15l/kWto18
litersforthe06modelorto25liters(forthe09model)orto35litersforthe12modelandto45litersforthemodel15,in
ABSOLUTE,oftheHPEunits.Becauseofthereducedwatercontent,theHPEunitscanbeinstalledinplantswithoutwatertank
withadvantagesintermsoftheappliance’sreducedsize,theinstallationspace,heatlossandinstallationandmaintenance
costs.
5.9 MONITORINGANDPROTECTIONDEVICES
Allunitsarestandardsuppliedwiththefollowingmonitoringandprotectiondevices:returnwatertemperaturesensorinstalledat
thereturnwaterpipelinefromtheplant,operatingandantifreezesensorinstalledattheoutletpipeofthewatertotheplant,
highpressuretransducer,lowpressuretransducer,compressor’sinletandoutlettemperaturesensors,compressorsthermal
protectiondevice,fansthermalprotectiondevice,watersideinstalledwaterflowswitchtoprotecttheevaporator,highpressure
HPflowswitch.
CAUTION:TheINVERTERcontrolsystemisabletomanageintheplanttheminimumwatercontentsuptoavalue
of18litersforthe06model,of25litersforthe09model,of35litersforthe12model,andof45litersforthe15
model.ThisvaluemakesreferencetothelitersabsolutevalueandnottoanykWofinstalledpower.
5.10 HYDRAULICCIRCUIT
TheHPEchillersunitsaresuppliedwithanintegratedhydrauliccircuitincludingthecirculatingpump,suitablefor chilled water
utilization and directly run by a controller on board. The circulator is always modulating type, it adopts asynchronous
motor. The hydraulic circuit also includes: expansion vessel, safetyvalve(6bar)andtheautomaticairreleasevalve.
5.11 FANSPEEDCONTROL
Thistypeofcontrolismanagedbythemicroprocessorandisnecessaryforoptimizing thepressure of evaporation/condensation
during summer/winter operationinordertoallowproperrunningoftheunit.
6AVAILABLEVERSIONS
HPE - reversible heat pump with integrated hydronic system (expansion vessel, safety valve, pressure gauge, modulating
pump,flowswitch,automaticairreleasevalveload/unloadvalve).
Availableversions:06,09,12e15.
6.1 OPTIONALACCESSORIES
CRH‐ Remotecontrolpaneltobeinstalledintheroomfortheunitremotecontrolling,withadditionalfunctionsincomparisonto
theoneinstalledonboard;itcanalsorunourhydronicterminalunits.
AG‐ Anti‐vibrationrubberpadtobeinstalledinthechassisoftheunitforpossibleshockabsorption.
KA‐ antifreezingkit(thisaccessoryhavetoberequiredwhentheorderisplacedandhavetobefactoryinstalled).Itismadeup
ofanauto‐heatingcablethermostatedat5°Candwrappedaroundthebaseoftheunitnearthecondensingcoilandtwo
PETheatersinstalledonthesidesoftheplateheatexchanger.
7INSTALLATION
WARNING:AlltheoperationdescribedinnextchaptersMUSTBEDONEBYTRAINEDPEOPLEONLY.Beforeany
operationontheunit,besurethattheelectricsupplyisdisconnected.
7.1 GENERALITY
Wheninstallingorservicingtheunit,itisnecessarytostrictlyfollowtheruleslistedinthismanual,toconformtoallthe
specificationsofthelabelsontheunit,andtotakeanypossibleprecautions.Notobservingtherulesreportedonthismanualcan
createdangeroussituations.
Afterreceivingtheunit,immediatelycheckitsintegrity.Theunitleftthefactoryinperfectcondition;anyeventual
damagehastobequestionedtothecarrierandrecordedontheDeliveryNotebeforesigningit.
A2B Accorroni E.G.hastobeinformed,within8days,oftheextentofthedamage.TheCustomershouldprepareawritten
statementofanyseveredamage.