Regulus RTC 6i Manual

www.regulus.eu
RTC 6i
RTC 6i
EN
Installation and Maintenance Manual
RTC 6i
Inverter Air-to-Water Heat Pump

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RTC 6i - www.regulus.eu
CONTENTS
GENERAL OPERATING INSTRUCTIONS ......................................................................... 3
SAFETY INSTRUCTIONS .................................................................................................. 3
1. TECHNICAL DATA .......................................................................................................... 4
1.1. Sound data (by EN 12 102) ............................................................................... 4
 1.2.Energye󰀩ciency............................................................................................... 4
 1.3.Performancedata.............................................................................................. 5
1.4. Heat pump pressure drop .................................................................................. 6
 1.5.Dimensions........................................................................................................ 6
2. CONNECTION VARIANTS ............................................................................................. 7
 2.1.Directconnectiontoaheatingsystem,DHWheatinginahotwaterstoragetank.... 7
 2.2.Connectionwithathermalstore(combinationwithotherrenewableheatsources) 7
 2.3.Heatingsystemusedforcooling........................................................................ 7
3. CONSTRUCTION READINESS & INSTALLATION ....................................................... 8
 3.1.Scopeofsupply................................................................................................ 8
 3.2.Installationpreparationandtransport............................................................... 8
 3.3.Minimumdistances........................................................................................... 9
 3.4.Placementoftheheatpump............................................................................. 10
 3.5.Condensatedrain............................................................................................. 11
 3.6.Pipeinstallation................................................................................................ 12
 3.7.Electricalwiring................................................................................................ 13
 3.8.AddressingHPinacascade.............................................................................. 13
4. COMMISSIONING ......................................................................................................... 14
 4.1.Initialstartup.................................................................................................... 14
5.MAINTENANCEANDSERVICING................................................................................. 15
 5.1.Usermaintenance............................................................................................. 15
 5.2.Professionalmaintenance................................................................................. 15
 5.3.Faultdiagnosis.................................................................................................. 15
 5.4.Refrigerantcircuitdiagram................................................................................ 16
 5.5.Componentplacement...................................................................................... 17
 5.6.Internalwiringdiagram...................................................................................... 18
 5.7.Faultconditionsandtheirpossiblecauses........................................................ 19
6. RELATED DOCUMENTATION ........................................................................................ 22
7. DECOMMISSIONING ..................................................................................................... 22
8. RECYCLING / DISPOSAL .............................................................................................. 22
9.RECORDOFREPAIRSANDINSPECTIONS................................................................ 23

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GENERAL OPERATING INSTRUCTIONS
Readthismanualcarefullybeforeoperatingandkeepitataneasilyaccessibleplaceforfuture
reference.Ifneeded,themanualcanbedownloadedinpdfformatfromhttp://www.regulus.eu/,or
obtainedfromthecompanyandprinted.Ifyouhaveanydoubtsoruncertainties,pleasecontactyour
equipmentsupplierortechnicalsupportofRegulus.
SAFETY INSTRUCTIONS
- Thedesign,location,hydraulicandelectricalconnectionsmustbedesignedbyaspecialistin
 accordancewiththeapplicableregulations.
- Theequipmenthasbeendesignedforheatingorcoolingofheatingwater.Otheruses,unless
 specicallyauthorisedbythemanufacturer,isnotpermitted.Heatingwateroramixtureof
 waterwithglycolorglycerinebasedantifreezemaybeusedasaheattransfermedium.
- Theheatpumpshallbesecurelyearthed.
- Respecttheoperatinglimitsoftheequipment.
- The device is designed for outdoor installation. However, avoid installation in areas with
 excessivedustorhumidity-suchasnearthehoodoutlet,etc.
- Theappliancemustbelocatedinanopenareawherethereisnoobstructiontotheowof
 intakeorexhaustair.
- Theappliancemustnotbelocatednearopenamesorsourcesofignition.
- The equipment shall not be operated in an environment with explosive or chemically
 aggressivegasesandsubstances.
- Allworkmustbecarriedoutbyprofessionalandqualiedsta󰀨.
- Whenhandlingtheheatpumpwithacraneorotherliftingequipment,makesurethatthe
 liftingdevices,lugs,etc.arenotdamaged.Neverstepundertheliftedload.
- Wearpersonalprotectiveequipment(goggles,gloves,etc.)
- Theequipmentcannotbeusedbychildrenandpersonswithreducedphysical,sensoryor
 mentalabilities,orbyuntrainedpersonswholackthenecessaryknowledge.
- Ensurethattheheatpumpisswitchedo󰀨beforeanyintervention.
- Itisforbiddentocarryoutmaintenanceorcleaningwhentheequipmentislive.
- Itisforbiddentotouchtheequipmentbarefootorwithwetbodyparts.
- Donotspraywaterorotherliquidsontheequipment.
- Theequipmentcontainsrapidlyrotatingparts.Therefore,donotpushanyobjectsintothe
 device.
- Theheatexchangerlamellasaresharpandcancauseinjury.
- Somepartsoftheequipment(e.g.thecompressoranditsoutletpipes)maybeveryhoteven
 afterstoppingoperation.
- Itisforbiddentostandonthedevice,sitonitorplaceobjectsonit.
- Itisforbiddentopull,twistordisconnecttheelectricalcablesconnectedtotheequipment.
- Neverdisassemblecasing,covers,etc.thatareboltedtogether.
- Neverdisablesafetyfeaturesoftheequipment.
- Donotinterferewiththerefrigerantcircuitorelectricalwiring.Serviceworkmustonlybe
 carriedoutbyanauthorisedserviceorganisation.
- Adamagedpowercablemayonlybereplacedbyanauthorizedserviceorganization.
- Itisforbiddentoleavethepackagingmaterialwithinreachofchildren,asthismayposea
 dangertothem.
- It is forbidden to tamper with or replace any parts of the equipment without the express
 permissionofthemanufacturer.
- Iftheseinstructionsarenotfollowedduringinstallation,operationandmaintenanceofthe
 system,themanufacturerdoesnotfeelboundbythetermsofthewarranty.

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1. TECHNICAL DATA
Heatingoutput¹ 6.21kW
Powerinput¹ 1.53kW
COP¹ 4.06
Steadycurrent 7.0 A
Startingcurrent 2.4 A
Nominalcurrent 12 A
Powersupply 1/N/PE~230V50Hz
Recommendedcircuitbreaker B16A 1f
IPrating IPX4
Max.owtemperaturefromHP 55°C
Max.heatingwatertemperatureatHPinlet 100°C
Max.workingpressureofheatingwater 3 bar
HeatingwatervolumeinHP 4.5l
Min.volumeofheatingsystemthatcannotbeshuto󰀨 60l
Min.owratethroughHP 680l/h
Min.surfaceareaofheatexchangerinHWstorage
tank
1 m²
Airworkingtemperatureforheatingmode –25to45°C
Airworkingtemperatureforcoolingmode 0to55°C
Max.airowrate 2700m³/h
Number of fans 1
Fan speed variable
Max.fanpowerinput 65W
Compressortype/oil twinrotary/FV50S
Refrigerant R410A(GWP2088)
Refrigerantquantity 1.30kg
CO2equivalent² 2.71 t
Max.refrigerantworkingpressure 42 bar
Connections G 1"
Weight 66kg
1for temperatures A+7/W35 at max. speed
2not subject to mandatory leak checks under EU Regulation No. 517/2014
1.1. Sound data (by EN 12 102)
Soundpowerlevel 57dB(A)
Soundpressurelevelat5mdistance 38 dB(A)
Soundpressurelevelat10mdistance 32 dB(A)
1.2. Energy E󰀩ciency
Seasonalspaceheatingenergye󰀩ciency 176%
EnergyE󰀩ciencyClass A+++
SCOP 4,47
For low-temperature applications under average climatic conditions

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1.3. Performance data
HEATING
Speed Air temperature Flow temperature Output [kW] Power input [kW] COP [-]
85 Hz
7 °C
35 °C 5.42 1.44 3.77
45 °C 5.17 1.71 3.02
55 °C 4.89 2.04 2.40
2 °C
35 °C 5.30 1.42 3.75
45 °C 5.03 1.66 3,03
55 °C 4.84 1.94 2.49
-7 °C
35 °C 4.03 1.31 3.09
45 °C 3.46 1.45 2.39
55 °C 3.48 1.78 1.95
-15 °C
35 °C 3.16 1.21 2.62
45 °C 2.90 1.38 2.10
55 °C 2.62 1.63 1.61
50 Hz
12 °C
35 °C 3.71 0.75 4.98
45 °C 3.48 0.94 3.69
55 °C 3.75 1.15 3.25
7 °C
35 °C 3.24 0.75 4.33
45 °C 3.10 0.93 3.35
55 °C 2.81 1.11 2.53
2 °C
35 °C 3.15 0.75 4.23
45 °C 2.82 0.91 3.12
55 °C - - -
-7 °C
35 °C 2.27 0.72 3.14
45 °C 2.01 0.85 2.38
55 °C 1.79 1.00 1.79
-15 °C
35 °C 1.72 0.69 2.50
45 °C - - -
55 °C - - -
36 Hz
12 °C
35 °C 2.73 0.53 5.20
45 °C 2.47 0.67 3.71
55 °C 2.62 0.83 2.63
7 °C
35 °C 1.60 0.50 3.25
45 °C - - -
55 °C 1.85 0.80 2.30
2 °C
35 °C 2.18 0.53 4.10
45 °C 2.00 0.65 3.06
55 °C - - -
COOLING
Air temperature Flow temperature Output [kW] Power input [kW] COP [-]
35 °C 23 °C 5.81 2.10 2.77
12 °C 4.50 1.74 2.59

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1.4. Heat pump pressure drop
1.5. Dimensions

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2. CONNECTION VARIANTS
The heat pump is part of the energy system of the house. The correct design of a heat pump
depends on the energy needs of the building and should be carried out by a specialist. These
methodsofconnectionarethemostcommonlyusedandserveasabasisfortheproject.Ifproject
documentationexists,followit.
Forsystemcontrol,itisnecessarytouseanIR 14 RTCsmartcontrollerwhichcontrolsthe
entireheatingandhotwatersystem.Itisequippedwithanintegratedwebserverpermitting
controlthroughawebbrowser,orviaasmartphoneortabletwiththeIRClientapplication
(forAndroidandiOS).
2.1. Direct connection to a heating system, DHW heating in a hot water storage tank
The accessory is represented by RegulusBOX  or an
additionalheatsourceintheformofaninlineheater
(code16166)equippedwithanelectricheatingelement
ofupto7.5kWoutputandanoptionalindirectheated
hotwaterstoragetankwithaheatexchangersurfaceof
min. 1.0 m2(e.g.RegulusRDC200–code12758).The
largertheheatexchangeareaoftheHWstoragetank,
thefastertheDHWheatingwillbeandtheheatpump
willbeabletopreparehotwatermoreeconomically,orit
willbeabletoheatDHWtoahighertemperature.Inthis
directconnectiontotheheatingsystem,itisnecessary
tokeeptheminimumowthroughtheheatpumpatthelevelofmin. 680 l/hwithsu󰀩cientheat
supplyfordefrosting,i.e.itisnecessarytohaveapartoftheheatingsystemwithoutshut-o󰀨valves
installed,e.g.thermostaticvalves.Approximatelyitisatleast5radiatorsofnormalsize(e.g.0.6x
0.9m),oratleast30m2 ofunderoorheatingwithoutthepossibilitytobeshuto󰀨.
2.2. Connection with a thermal store (combination with other renewable heat sources)
The accessories consist of a thermal store for heating only
(Regulus PS series), or a combination thermal store with
immersedDHWtank(RegulusDUOseries),orathermalstore
withcontinuoushotwaterheatinginastainlesssteelDHWheat
exchanger(RegulusHSKserie
Thisconnectionissuitableforcombiningaheatpumpwithother
heat sources, such as biomass boilers, replace inserts and
stoveswithahydronicheatexchanger,solarthermalsystems,
solarphotovoltaicsystems,etc.Thethermalstoreshallbesized
dependingontheselectedtypeandoutputofthecombinedheat
source,e.g.forcombinationwithPVpanels,thetotalvolumeof
thethermalstorecanbecalculatedusingtherelationship180l/1kWpPVoutput.Forexample,for
anarrayofPVpanelswithapeakoutputof5kWp,thetankvolumeshallbe900litres.Alwayshave
thesizeandtypeofthethermalstoredeterminedbyaspecialist!
2.3. Heating system used for cooling
RTC6iheatpumpsalsoallowcoolingofbuildings.Ifcoolingoperationisused,alltanksandchilled
waterdistributionsystemsmustbevapor-insulated.Iftherearealsospaceheatingelementsinthe
buildingthatarenotsuitableforcooling(radiators,heatedtowelrails,etc.),itisnecessarytoensure
thatthesecircuitsareshuto󰀨topreventundesiredcondensation.

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3. CONSTRUCTION READINESS & INSTALLATION
Theinstallationmayonlybecarriedoutbyapersonwithavalidmanufacturer‘sauthorization.If
anyofthesubsidytitlesareusedtoacquireasubsidyfortheheatpump(e.g.boilersubsidies,or
theNewGreenSavingsprogram),theinstallationcompanymustmeettherequirementsofcurrent
legislation.
3.1. Scope of Supply
- RTC6iHeatPump
- InstallationandOperationManual
- 2compensatorstoprotecttheplateheatexchangerintheheatpumpagainstfrostrupture
3.2. Installation preparation and transport
Theinstallationmustbecarriedoutbyaqualiedpersoninaccordancewiththeapplicablestan-
dardsandallregulationsconcerningoccupationalsafetymustbeobserved.
- Theheatpumpshallbetransportedandstoredinanuprightpositiononly.
- Checkthattheproducthasnotbeendamagedintransit.Reportimmediatelyanytransport
 damagetothecarrierandsupplier.
- Transporttheunittotheinstallationsitebeforeremovingthepackaging.
- Movetheproductwithapallettruckorforkliftifpossible.
- Itispossibletouseliftingstrapstied
 aroundthepallet,howeveronlyifthe
 packaging (the wooden frame) had
 notbeenremoved.
- MIND THE DIFFERENT WEIGHT
OF THE RIGHT AND LEFT SIDE OF
THE HEAT PUMP!

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3.3. Minimum distances
The heat pump itself is intended for outdoor
installation, it is usually placed to the outer wall
of the building, with the fan facing away from
the building.At least 2 m of free space must be
maintainedinfrontoftheheatpump.Thelocation
mustbechosensothattheaircanflowcompletely
freelythroughtheheatpump.Usedcoldairshould
notbesuckedagainintotheinletonthebackas
thiswillcausetheperformanceparametersofthe
heatpumpdeteriorate.
Iftheproductisplacedinanareawhereitwillbe
exposedtoparticularlyharshweatherconditionsor
ifthereisariskofdamagefromsnowfallingfrom
aroof,theproductcanbe installedunderneath a
smallawning.
Followtherecommendationsbelowwhenchoosing
aheatpumplocation:
Location: makesurethattheheatpumpdoesnot
disturbyouoryoursurroundingswithnoise,avoid
installationatabedroomwindow,patioorfence,or
closetotheboundariesofneighbouringproperties;
ifpossible,we recommend not installing the heat
pump in a corner; when placed in a corner, the
resultingsoundpressurelevelmayincreasedueto
reflectionsfromthesurroundingwalls.
Material of surrounding surfaces: avoid using
materials with increased sound reflectivity; it is
unsuitable, for example, to line the surrounding
surfaceswithceramictiles.
≥ 300 ≥ 300
≥ 300

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3.4. Placement of the heat pump
Donotplacethedeviceonthewindwardsidewherestrongwindscouldblowagainstthefans.
Respect the usual snow depth in the area and adjust the installation height above the ground
accordingly.
a) Installation on concrete
blocks
Theheatpumpisplacedonthe
legs at the factory and exibly
mountedonanti-vibrationrubber
silent blocks. The heat pump
supplied in this way shall be
installedonconcreteblocks.The
foundations of concrete blocks
shouldreachafrost-freedepth.
Theheatpumpisplacedonthe
prepared foundation structure
and levelled with a spirit level
so that it is placed perfectly
horizontally. It is not necessary
toanchor theheat pumptothe
baseor to the outerwallofthe
building.
b) Installation on wall brackets
Theotheroptionistoplacethe
heatpumponthehousestructure
usingwallbrackets(code17458).
Before mounting the bracket
on the wall, it is important to
verify its load-bearing capacity.
Depending on the composition
and thickness of the wall, it is
recommendedtouseachemical
anchororathrough-wallanchor
forinstallation.
Thebracketsaregalvanizedand
thecompletesupportissupplied
includingsteelropesensuringits
spatialrigidity.
Follow the instructions for the
wallmountingbrackets.
Prior to placing the heat pump
on the brackets, unscrew the
silent blocks (30 mm high) that
come with the heat pump from
production and replace them
with silent blocks designed for
brackets (40 mm high). These
silentblocksareincludedinthe
supplyofwallmountingbrackets.
Leveltheheatpumpwithaspirit
levelsothatitisplacedperfectlyhorizontally.
Wallbrackets(code17458)
condensate
drain
Ø 40 mm
concrete
blocks
coarse crushed
stone, 32-63 mm
frost-free
depth
moisture barrier
condensate
drain
Ø 40 mm
condensate
drain
Ø 40 mm
condensate
tray
P-trap

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3.5. Condensate drain
Watercondensationnormallyoccursduringheatpumpoperation;upto50littersofcondensatecan
begeneratedperday,dependingontheoperatingconditions.Theheatpumpisequippedwitha
condensatetray.Aheatingcableisinstalledinthecondensatetrayasaprotectionagainstfreezing.
Thecondensatetrayshallbeconnectedtoadrainpipeforcondensatedrainage.Ifnecessary,itis
possibletoplaceaheatingcableinthedrainpipe.Theheatingcabletothedrainpipeisnotincluded
insupplyandcanbeorderedasanoptionalaccessory(code18491).
Thedrainpipecanberun:
a) to the ground to a frost-free depth –theoutletandthespacearoundthepipemustbelled
withcrushedstonetoensuresu󰀩cientcondensatedrain,theundergroundsectionofthepipecan
beperforated,
b) into the building, in its sewage system –thethrough-wallpassageshallbeabovetheground
andawatertrapshallbeinstalledinside(seeFig.below),
c) to the building’s drainage system, e.g. downpipe drains or eaves
Itisrecommendedtoinsulatethedrainpipewiththermalinsulation.
vana pro sběr kondenzátu
odvod kondenzátu Ø 40 mm
condensate tray
condensate drain Ø 40 mm
P-trap

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3.6. Pipe installation
Thehydraulicconnectionoftheheatpumpmayonlybecarriedoutbyaqualiedspecialist.
Thehorizontalsectionsoftheconnectingpipeshall
alwaysberoutedsothattheycanbeairbled.The
connecting pipe shall be insulated. Pipes laid in
theexteriorofthebuildingshallbeprovidedwith
thermal insulation resistant to moisture with a
minimumthicknessof19 mm.Indoorsthepiping
shall be provided with insulation at least 13 mm
thick.
Theconnectiondimensionsoftheheatpumppipes
areG1“F.Compensatorsshallbettedtothese
pipes to increase the frost protection of the heat
pumpheatexchanger.Compensatorsareincluded
in supply.A G 1“ M nipple, which is included in
supply(incl.gaskets),isusedtoconnecttheheat
pumpoutletpipetothecompensator.
Tolimitthetransmissionofvibrationstothehousestructure,itisrecommendedtoconnecttheheat
pumpusingbraideddi󰀨usion-tighthosesofsuitablelength.Hosesareincludedinthedeliveryonly
forheatpumpssuppliedasaSpecialO󰀨er,otherwisetheymustbeorderedseparately.Braideddif-
fusion-tighthoseswithF/ForM/FthreadsforRTC6iheatpumpscanbeorderedinlengthsof500,
700and1000mm.Toeliminatethetransmissionofvibrationstotheadjoiningpipelineandpossibly
alsotothehousestructure,itisrecommendedtorunthebraidedhoselooseinaslightbend.
Wheninstallingcompensatorsandbraidedhoses,followtheinstructionsintheseparateInstallation
Manualsthatwillcomewiththeseproducts.
Continueafterthebraidedhosewithcopper,stainlesssteelorotherpipesofsuitablesize.The
appropriatedimensionofthepipeisprescribedbytheheatingdesigner,thedimensionspeciedby
himisbindingandmustbeobservedduringinstallation.Belowareonlyindicativerecommended
pipedimensions:
Distance
(total length of piping) < 30 m 30 - 40 m > 40 m
Indicative recommended
pipe diameter Cu22x1(DN20) Cu28x1,5(DN25) Calculationneeded
Forthecorrectoperationofthedevice,itisnecessarytokeeptheminimumowthroughtheheat
pumpatthelevelofmin. 680 l/h.
In heating systems, use treated water that is properly ltered and free of all impurities. In
particular, it is important that the heating water does not contain more than 300 ppm of
chlorides and that the pH value is between 6 and 8.
Make sure that the lter with magnet is installed.
Avoid using zinc-plated parts that can cause excessive corrosion of the system.
return, cold in
G 1“ M
ow, hot out
G 1“ M
condensate
drain,
Ø 40 mm

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3.7. Electrical wiring
Electrical connection and any interventions in it may only be carried out by a qualied person
with the appropriate authorization!
- Checkthatthepowersupplytotheutilityroomissu󰀩cientandinaccordancewiththeproject
 documentation,resp.accordingtovalidstandardsandregulations.Thecross-sectionofthe
 supplycablefortheentireheatingtechnologydependsontheapplicationandtheoutputof
 theauxiliaryheatsource.
- Connectionofotherdevices(IR14 RTC controller, auxiliary heat source, circulation pumps,
valve actuators, etc.):connectaccordingtotherelevantinstructionsorprojectdocumentation.
AsuitableheatpumpcircuitbreakerformostinstallationsundernormalconditionsisB16A1f.If
aresidualcurrentdeviceisinstalledintheheatpumpcircuit,itshouldbeaG-typeRCD(delayed).
Communication: 15mcommunicationcableLiYCY(TP)3x2x0.75mm2ispartofthecontroller
supply.
Power supply: thepowercableisnotincludedinthedelivery,werecommendusingapowercable
withacross-sectionof3x2.5mm2,unlessotherwisestatedinthedesign.
3.8. Addressing HP in a cascade
TheaddressingoftheindividualheatpumpsinstalledinthecascadeisperformedviaDIPswitches
6,7and8ontheJNP401switch,whichislocatedontheprintedcircuitboard.Thedefaultaddress
is2.
Thesettingoptionsareasfollows:
cables connection point
Address Address

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4. COMMISSIONING
4.1. Initial start up
Commissioning must be carried out by a service provider with a valid authorization issued
by REGULUS.
Basicchecklist:
- Check that the heat pump and system are lled with water, air bled and pressurized
 (1.5-2.5bar).
- Checkthattheheatingsystemhasbeenproperlyushedandlledwithcleanandtreated
 heatingwaterthatmeetstherequirementsofthismanual.
- Checkconnectionsforleaks.
- Zkontrolujteizolacepotrubí.
- Zkontrolujte, zda jsou uzavírací kohouty hydraulických okruhů otevřeny a není blokován
 průtokvodyjednotkou
- Checkpipinginsulation.
- Check that the shut-o󰀨 valves of the hydraulic circuits are open and that the water ow
 throughtheunitisnotblocked.
- Checkthattheinletandoutletpipesoftheunithavenotbeeninterchanged.
- CheckthataMagnetFilterballisinstalledonthereturnpipetotheheatpump
- Checkthattheelectricalinstallationiscarriedoutinaccordancewiththeapplicableregulations
 andwiththelabelontheunit(checkinparticularthedimensionsofthesupplycable,circuit
 breaker,residualcurrentdeviceandcorrectearthing).
- Checkthemainsvoltageattheinstallationsite.
- Checkthatthepowercableisnotdamagedandthattheterminalsonthewiringareproperly
 tightened.
- -Checkthecorrectwiringofelectricalcomponents(circulationpumps,valves,temperature
 sensors,etc.).
- Checkthatthefansrotatefreely.
- Makesurethattheunithasunrestrictedairaccess.
- Checkthatallprotectivecoversarettedandsecured.
- Switchontheheatpumpthroughthecontroller.
- Whenthesystemheatsup,carryoutapressureandheatingtest.Theseactivitiesshouldbe
 recordedinaheatingtestandleaktestreport.
- Setallnecessaryparametersofthecontrolsystem.
- Informtheuseraboutthelocationofswitches,circuitbreakersandtheirfunctions.
- Informtheuseraboutothersafetyfeaturesandindicators(safetyvalves,pressuregauges,
 analoguethermometers,etc.)andtheirfunctions.
- Informtheuseraboutthecontrollercontrolandusermenu.
- Checktheavailabilityofalldocumentationoftheinstalleddevices.
Theservice providershall llinthe Heat Pump Commissioning Protocol andtheheat pump
ownershallsignit.

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5. MAINTENANCE AND SERVICING
- Useadampclothtomaintaintheoutersheetmetalandplasticparts.Donotuseabrasive
 cleanersorsolvents.
- Protecttheheatexchangernsfromsnow,fallenleavesandotherdirt.Checkregularlyor
 cleanverycarefullywithasoftbrush.
- As of the date of placing on the market, the heat pump is NOT subject to regular
refrigerant leakage checks.
5.1. User maintenance
Itisrecommendedtoperformusermaintenanceeverymonth:
• Pressurecheck(locallyorviaremoteaccessincaseofinstallationwithRegulusBOXindoor
 unit).Ifnecessary,ventandtopupwatertothesystem.
• Condensatedraincheck.
• Visualinspectionforleaksofworkinguids.
• Ifnecessary,cleanthe outer covers of the device with non-aggressive and non-abrasive
 cleaningagents(e.g.aslightlydamppieceofcottoncloth).
• Checkthennedheatexchangerforclogging.Carefullyremovefallenleavesandotherdirt.
 Youcanuseavacuumcleanerorasoftbrush.Thensoftheheatexchangeraresharpand
 cancauseinjuries-thereforebecarefulwhencleaningit.Incaseofconsiderablecontamination
 ofthennedheatexchanger,itisadvisabletohaveitcleanedbyaqualiedtechnician.
5.2. Professional maintenance
Itisrecommendedtohaveprofessionalmaintenanceperformedbyanauthorizedservicetechnician
onceayear:
• Checkwiringandtightenconnections
• Checkthecorrectfunctioningofthesafetyelements
• Adjusttheexpansionvesselpressure
• Cleanthelterintheheatingsystem.(Theunitmustbeturnedo󰀨whencleaningthelter.)
• Checkfanmountingandbalance.
• Checkpowerinput.
• Checktherefrigerantandpossibleleaks.
• Checkworkingpressuresandtemperaturesintherefrigerantcircuit.
• Checkthecirculationpump.
• Checkcoverfastening.
• Checktheheatingwaterquality.
• Checkthennedheatexchangerfordirt.
Warning: Risk of electric shock if live parts are touched!
Disconnect the device from the power supply before working on live parts!
5.3. Fault diagnosis
Ifafaultoccurs,youshouldalwayscontacttheinstallationcompanythatinstalledyoursysztemwith
theheatpump.Ifthesupplierconsidersthatthefaultiscausedbyamaterialordesigndefect,the
installationcompanywillcontactthesupplierandrepairthedefect.Inthecommunicationwithyour
installerorheatpumpsupplier,alwaysreporttheserialnumberoftheheatpump(indicatedonthe
labelonthebackoftheheatpumpandintheHeatPumpCommissioningProtocol).
Error messages
Ifthesystemregisterssomenon-standardconditionorfault,thecontrollerisinformed.Theinformation
aboutanon-standardconditionorfaultisshownonthecontrollerdisplayandatthesametime,itis
availableviathecontrollerwebsite.Ifset,thecontrollersendsanemailmessageabouttheproblem.
Formoreinformation,pleaserefertothemanualoftherespectivecontroller.

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Air in system
Ifthereisabubbling,hissingorevensqueakingsoundfromthepiping,circulationpumpornearthe
outdoorunit,theremightbeairinthesystem.Contacttheinstallationcompanytoeliminatethese
phenomena.Theairinthepipingcausesadropintheheatingwaterowandthesystemcaneva-
luatethisasafaultcondition.
Insucient heating water ow
Possiblecausesare:
- smallpipedimension
- airinpipes
- dirtylter
- closedvalve
- impuritiesdepositedintheplateheatexchanger
- otherobstaclestowaterow
- defectivecirculationpump
Defrosting
The fan stops during the defrosting cycle, but the compressor is still running. Melted ice ows
intothecondensatetrayundertheheatpump.Assoonasdefrostingiscompleted,thefanstarts
upagainandacloudoffumesformedbymoistairmayformforashorttime.Thisisaperfectly
normalphenomenonthatdisappearsafterafewseconds.Onfrostydays,checkforiceinunusual
places(heatpumplegs,condensatetray,fan,etc.).Possiblecausescanbe:blockedcondensate
drainpiping(e.g.whencondensatefreezesinsidethepiping),defectivedefrostingcontrol,lackof
refrigerant(leakage),extremeweatherconditions.
5.4. Refrigerant circuit diagram
Heatingmode
Coolingmode
powersupply
four-wayvalve
heating
waterout
heating
waterin
compressor
fan
service
valve
plateheat
exchanger
refrigerant
collector drying
lter expansion
valve
nnedheatexchanger

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5.5. Component placement
Pos. Name Pos. Name
1Evaporatorsensor 15 Lowpressuresensor
2Compressorheatingelement 16 4-wayvalvecoil
3Condensatedrainheatingelement 17 Four-wayvalve
4Suctiongassensor 18 Outer PCB
5Compressor 19 Hot gas sensor
6Plateheatexchanger-condenser 20 Installationbox
7Liquidrefrigerantsensor 21 PFCcondenser
8Watertemperaturesensor-inlet 22 Highpressuresensor
9Flowswitch 23 Highpressureswitch
10 Watertemperaturesensor-outlet 23 Finnedheatexchanger-evaporator
11 Outdoor temperature sensor 25 Fan motor
12 Electronicexpansionvalve 26 Fanpropeller
13 Electronicexpansionvalvecoil 27 Condensate tray
14 Electriclter 28 FeetforRTC6i

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5.6.Internal wiring diagram
POWERSUPPLY COMMUNICATION
GREEN/YELLOW
FLOWSWITCH
REFRIGERANT TEMPERATURE
SENSOR
WATERTEMPERATURE
SENSOR - INLET
WATERTEMPERATURE
SENSOR - OUTLET
HIGH PRESSURE
SWITCH
FOUR-WAY
VALVE
COMPRESSOR
HEATING
ELEMENT
CONDENSER
HEATING
ELEMENT
INTERNAL WIRING DIAGRAM
SUCTION GAS SENSOR
OUTDOOR TEMPERATURE
SENSOR
REFRIGERANT TEMPERATURE
SENSOR
HOT GAS SENSOR
RTC PCB
COMPRESSOR PCB
PCBWITHPFC
PFCPOWERFACTORCORRECTION
GREEN/YELLOW
COMPRESSOR
LOWPRESSURESENSOR
HIGH PRESSURE SENSOR
RED
BLACK
BLUE

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5.7. Fault conditions and their possible causes
Compressor overcurrent
Iftheinputcurrentistoohighorthesystemisoverloaded,thecompressorwillshutdown.The
devicewillrestart5minutesaftertherstalarm.Ifthealarmrepeats3timesinarow,theunitwill
shutdown.
Check:
• devicepowerconsumption
• technicalconditionofthefan
• cloggingofthennedandplateheatexchangers
• heatingwatertemperatureandowandreturntemperaturedi󰀨erence
Protection of IPM module
Compressorspeedcontrolerror.
Check:
• compressorinverterboard
• whethercablesareinterruptedorloose
• technicalconditionofthecompressor
Compressor lubrication
Iftheunitisoperatedatlowcompressorspeedforalongtime,theunitwillincreasethespeedto
getmoreoilintothecompressor.Thisisanormalconditionthatdoesnotrequireanyintervention.
High/low refrigerant pressure
If the refrigerant pressure is too high or low, the compressor will stop.  The device will restart
5minutesaftertherstalarm.Ifthealarmrepeats3timesinarow,theunitwillshutdown.
Check:
• technicalconditionofthefanandcirculationpump
• cleanlinessofthennedandplateheatexchangers
• heatingwatertemperatureandowandreturntemperaturedi󰀨erence
Reduction of compressor speed at high refrigerant condensation pressure
Iftherefrigerantpressureistoohigh,thecompressorwillreducethespeed.Thedevicewillreturn
tonormaloperation5minutesaftertherstalarm.Ifthealarmrepeats3timesinarow,theunitwill
shutdown.
Check:
• technicalconditionofthefanandcirculationpump
• cleanlinessofthennedandplateheatexchangers
• heatingwatertemperatureandowandreturntemperaturedi󰀨erence
Compressor warm-up
Ifthecompressorhasnotbeenrunningforalongtimeoriftheoutdoortemperatureistoolow,the
compressorheaterwillswitchon.Thisisanormalconditionthatdoesnotrequireanyintervention.

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Compressor high outlet temperature protection
Check:
• whetherthewateroutlettemperatureisn’tsettoohigh(especiallyatlowoutdoortemperatures)
• whethertheheatingwaterowisn’ttoolow
• whetherthereisn’ttoolittleoilinthecompressor
Finned heat exchanger temperature sensor protection
Check:
• thatsu󰀩cientairowthroughthennedheatexchangerisensured
Undervoltage / overvoltage of the power supply
Check:
• thevalueofthepowersupplyvoltage
Speed limitation or compressor shutdown due to high / low outdoor temperature
Thisisanormalconditionthatdoesnotrequireanyintervention.
Reduction of compressor speed at low refrigerant condensation pressure
Iftherefrigerantpressureistoolow,thecompressorwillreducethespeed.Thedevicewillreturn
tonormaloperation5minutesaftertherstalarm.Ifthealarmrepeats3timesinarow,theunitwill
shutdown.
Check:
• whetherthereissu󰀩cientrefrigerantintheunit
• thatnorefrigerantcircuitleaksarepresent
• technicalconditionofthefanandcirculationpump
• whethertheexpansionvalveisworkingproperly
• whethertheheatingwatertemperatureisn’ttoolow
• whethertheowandreturntemperaturedi󰀨erenceisn’ttoobig
Temperature sensor error
Check:
• sensorresistance
• sensorconnectionandcable
High pressure / low pressure switch error
Theerrormessageoccurseitherifthepressureswitchisnotclosedinstandbymode,or2minutes
afterthecompressorisswitchedo󰀨.
Check:
• theconnectionandthecorrectfunctionofthepressureswitch
Fan error
Thefanhasnotreachedtherequiredspeedorisnotsendingafeedbacksignal.
Check:
• fan PCB
• fan motor
• cables