Heat Interface Units - Mibec · feature even when electric supply to the HIU is cut. Proven...

Product Features

• Highenergyefficiency

• Instantaneoushotwateravailability

• Electronictemperaturecontrol

• Optimisedheatingtemperaturecontrolasstandard

• Standbymodetemperaturecontrol

• Lowreturntemperaturesbacktothenetwork

Heat Interface Units

• Lowcarbonheatnetworks–Compatiblewithrenewableenergysources

• Weathercompensationoptionavailable

• Includeslowenergypump

• Suitableforradiatorsorunderfloorheatingsystems

• Requiresminimalmaintenancereducingrunningcosts

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Tel: +44 (0)1948 661639 Web: www.mibec.co.uk2


Advantages for Designers, Developers and Architects

• IndividualgassupplytoeachpropertyisnotrequiredwhenusingHIUs

• Nofluesarerequiredtoevacuateexhaustcombustion,savingcosts

• Storagecylinderarenotrequired,reducingcostsandincreasingavailablespace

• Meetslowemissionandefficiencytargets

Advantages for Installers

• Easytoinstall,addonlyaprogrammableroomthermostattocompletethesystem

• Compactandlightweight

• Minimalinstallationrequirementsforpipework

• Simplemaintenanceandeasyaccesstoallcomponentsinsidethebox

Communal Heat NetworksAcentralboilerhouseorrenewablesourcewillgenerateheatwhichisdistributedthroughanetworkofpipetoeachseparatepropertyinthebuilding.EachhomeorapartmenthasitsownHeatInterfaceUnit(HIU)installed,whichusesheatdistributedfromthecentralnetworktoprovideheatingandhotwaterforuseinthehome,replacingtherequirementforindividualboilersineachproperty.

Advantages for Landlords

• Reducedserviceandmaintenancecostscomparedtoindividualboilers

• Meteredenergyusageforfairertenantbilling

• Practicalforcombiningwithlowercostrenewabletechnologiesforthecentralheatsource

• Noindividualfluestomaintainforhealthandsafetylaws

Advantages for the Homeowner or Tenant

• Sharedmaintenancecostsacrossthepropertiesonthenetwork

• Noboilerworries

• Efficientlycontrolledheatingandhotwatersupply

• Accuratebillingforonlytheactualenergyused

• Awarenessofenergyconsumptionpromotesenergysavinginthehome

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The Hiper HIU Features

PID Control Unit(Proportional-Integral-Derivative)maintainstheefficiencyoftheHIU.Providestabletemperaturesundervaryingloadconditions.Uniquealgorithmsconstantlyrecalculatetheamountandthespeedofmodulationrequiredformaximumefficiency.

Pressure Independent ControlIntegralPICvalvewithelectricactuatorgivingproportionalmodulatingcontrolasinstructedbythePIDController,100%authority,(regardlessofpressurefluctuationsinthedistrictheatingsupply).UnlikemanyotherHIU,furthercontrolvalves(forexampleDifferentialPressureControlValves)arenotrequired.

Anti-Scale ControlIntheDomesticHotWater(DHW)PlateHeatExchanger(PHE)-theflowisalwaysdivertedawayfromtheDHWPHEintotheHTGPHEreducingthescaleformationpotential.

Automatic Fault DiagnosticsThecontrolunitcanidentifyfaultstocomponentswithintheHIUandissuesanidentifyingfaultcodeonthedisplay.Oncethefaultorerrorhasbeenrectifiedthecontrolunitwillautomaticallyresetandresumenormaloperation.

Heating Flow Automatic LimitationDecreasingthepossibilityofstarvingtheDomesticHeating(DH)circuitwhenextremedemandsaremadeontheentirenetwork.Forexampleincoldweatherwhenalargeheatingdemandismadeonthenetworkthecontrolunitdoesnotallow100%openingonstartupandpreventsthe‘overdemand’causingdisruptions.

Instant Hot Water ResponseInstantwaterresponseisguaranteedbykeepingheat(suppliedbythedistrictsupply)closeathandtotheHIUatalltimes.Atregularintervals(factorysetto20minutes),thecontrolleropens(factorysetto2min)thePICvalvetodeliveralowflowofabout100l/hr,thenclosesthevalveagain.ThisrepeatswhenevertheHIUisonstandbywhenthereisnodemand.

Optimised Heating ControlThereturntemperaturesareautomaticallymonitoredandcontrolled.ThecontrolleroftheHIUusesthisinformationtomaintaintheoptimumflowtempera-tureandkeeptheDISTRICTreturntemperatureaslowaspossible.ThiscanbeseenonthedisplayscreenasAUTOandisthefactorysetting.

DHWS PriorityDomesticHotWaterSupply(DHWS)isthepriorityoperationoftheHIU.AflowswitchdetectsthedemandattheHIU(ifinheatingmode)andswitchestoDHWproduction.Eveniftheheatingsystemisinfaultmode,theHIUwillstillproduceDHWS.

High DHW temperature safetyIfforwhateverreasonun-managedhotwateratextremetemperatureweretopassthroughthePlateHeatExchanger(PHE),thereisathermostaticlimitingvalveontheDHWexit.Thisislockedandfactorysetto60C.Beingnon-electricalthisstillmaintainsthesafetyfeatureevenwhenelectricsupplytotheHIUiscut.

Proven reliable componentsLowenergyErp(EnergyRelatedProducts)compliantpump.UniqueinletBlockwithByPass,testpoints,metersensorportandauniquelydesignstrainerwithincreasedsurfaceareaforlongeroperationwithoutblockingorreducedperformanceoverastandardpatternYStrainer.

Low & High Pressure protection for the HIULowpressureswitchwillstopthecirculatingpumpshouldthesecondarysystemdropbelow0.7Bar.TheHIUisfittedwithaSafetyReliefvalvesetat3barforhighpressureprotection.

Underfloor HeatingTheunitisfullycompatiblewithlowtemperaturesystemssuchasthoseinUFH.Theinstallersimplysetstherequiredvaluefortemperatureoninstallation.Fulldetailsareavailableintheinstallationmanual.

InsulationTheHIUpanelsareallfullyinsulatedincludingthebackplatetopreventoverheatingofthesurroundingarea.

Prepayment BillingCanbeaccommodatedwithanaccessorykittoshutdowntheunitwhenthetenantisnolongerincredit.

SecurityThemetalcasingcanbeclosedtopreventunauthorisedtamperingwithoptionalfixingboltsavailableonrequest.

HIU Hibernation modePressthestartbuttonandholdfor3secondsandtheHIUwillshut-down.ThePICVvalvewillshut,andheating,hotwaterandstandbyfunctionswillbedisabled.Pressthestartbuttontoresumenormaloperation.Thisisafunctionforwhentheapartmentisunoccupiedorforthetenantduringholidayperiods.

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The Hiper HIU Features

Proven PerformanceTheHIPERHIUhasbeenindependentlytestedandprovedconformstotheBritishStandardBSEN132-01-‘Gasfireddomesticappliancesproducinghotwater–Appliancesnotexceeding70kWheatinputand300ltwaterstoragecapacity–Part1,assessmentofperformanceofhotwaterdeliveries’.

TheHIUwastested,awarded2Stars,andmeasuredondeliveryofDHWat55C,withaDHflowtempof70C.Furtherdetailsandcopytestreportavailabletoallqualifiedenquiries.

Product OverviewTheHiperHIUiscompactandrequiresverylittlespaceinthepropertyandiseasytoinstall.Thedesignmeetsallvaryingdemandsofthehome.

InmanyrespectsaHIUislikeacombiboiler,providingcentralheatingandinstantaneoushotwater,butwithoutcombustionorneedingaflue.

Special Features

•Highenergyefficiency

•Instantaneoushotwateravailability

•Electronictemperaturecontrol

•Optimisedheatingtemperaturecontrolasstandard

•Standbymodetemperaturecontrol

•Lowreturntemperaturesbacktothenetwork

•Lowcarbonheatnetworks–Compatiblewithrenewableenergysources

•Weathercompensationoptionavailable

HiperXi45INDIRECTHIU45DHW/10HTG

PartCode:HIPER4510


PartCode:HIPER6010

HiperXi60LINDIRECTHIU60DHW/15HTG

PartCode:HIPER6015


PartCode:HIPER7015

Product Range

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The Hiper HIU Dimensions

heat interface units Dimensions

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The Hiper HIU Internal Schematic

heat interface units internal schematic.

1 Electronic PID Controller

2. Room Thermostat (not supplied)

3. Isolation valves (Secondary side)

3A Isolation valves (District side)

4. PICV (Pressure Independent Control valve)

4A PICV Actuator with step motor

5 Circulating Pump for the central heating

6 3 port Diverting Valve

7 DHW Plate Heat Exchanger

8 DHW temperature sensor

9 Flow switch

10 Central Heating Flow temperature sensor

11 Central Heating Return temperature sensor

12 Central Heating Plate Heat Exchanger

13 Pressure Switch

14 Safety Valve

15 Filling Loop Connection

16 Pressure Gauge

1

District (Primary) FLOW

DHW Supply

3

3

Cold water mains

Central Heating

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13

4

4A

3A

3A

District (Primary) RETURN

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3

5

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11 12

14

15

16

SV Discharge Pipe

Central Heating RETURN

Central Heating FLOW

1 ElectronicPIDController

2 RoomThermostat(notsupplied)

3 Isolationvalves(Secondaryside)

3A Isolationvalves(Districtside)

4 PICV(PressureIndependentControlvalve)

4A PICVActuatorwithstepmotor

5 CirculatingPumpforthecentralheating

6 3portDivertingValve

7 DHWPlateHeatExchanger

8 DHWtemperaturesensor

9 Flowswitch

10 CentralHeatingFlowtemperaturesensor

11 CentralHeatingReturntemperaturesensor

12 CentralHeatingPlateHeatExchanger

13 PressureSwitch

14 SafetyValve

15 FillingLoopConnection

16 PressureGauge

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The Hiper HIU Product Details

Proportional ControlAproportionalcontrolsystemisnotsimplyturningtheCHandDHWSonandoff,itfeedsinthesupplyfromtheDistrictsideinproportiontothedemand.Thisgivesstablehotwatersupplytemperatures,evenatverylowdemands.

Theheatingissimilarlycontrolledformaximumefficiency,astheroomwarmsupthecontrollerstartstolowertheamountofheatbeingallowedintothePHEsupplyingthecentralheatingalwaysmaintainingminimumenergyusage.

TemperatureandflowsensorsintheunitsendconstantinformationbacktothePID(Proportional-Integral-Derivative)controlunitwhichinturnsignalsthePICVtomodulateasrequiredtomeetthedemandandmaintaintemperaturestability.

Design and ConstructionTheunitisdesignedfortheplateheatexchangerstobeatthefronttoalloweasyaccess.Thesearemountedontopurposemadebrassblockswhichcontaintheintegralwaterwaysandcomponentconnectionpoints.Inter-connectingpipeworkiskepttoaminimum.

A

B

C

A-BrassManifoldBlocksB-DivertingValveC-PICVwithElectronicModulatingActuator

Description - Hiper Indirect HIU

• FittedwithtwoPlateHeatExchangers(PHE)oneforheating(CH)andoneforhotwater(DHWS)

• Theelectronicsprovide‘PROPORTIONAL’reactivecontroltodemand.PIDelectroniccontroller

• IntegralPICV(PressureIndependentControlValve).OnePICVreplacesthreeseparatevalvesthatwouldotherwiseberequiredtomaintainthemaximumlevelofsystemcontrolsotheHIUcanoperateeffectively

• Maximumefficiencywithlowestreturntemperaturesbackintothenetworkreducingrunningcosts

• Safetywithhightemperaturelimitsenforcedevenwithoutanelectricitysupplyon

• Systemscanbedesignedwithlittlerequirementforexpensivecommissioning

• Simpletomaintain,theplateheatexchangerscanbeaccessedandremovedinjustminutes

• PlateHeatExchangersaccessfromthefront• Insulatedwithatamperproofsteelcasing• HighqualityWilolowenergypump,fixedor

variablespeed• Automaticairventand3drainpoints• 3barsafetyreliefvalveonthesecondaryheating

side• Largesurfaceareastrainermeshforextended

maintenanceschedules• Sealedsystemheating• Thermostatichightemperatureprotection.• Flatfaceunion,3/4”connections

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The Hiper HIU Components

heat interface units

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3

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8 9 10

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16 2

components

1 District connection block inc. strainer

2 Electronic PID Controller

3. PICV (behind the controller)

4 Central Heating Plate Heat Exchanger

5 DHW Plate Heat Exchanger

6 Automatic Air vent

7 Circulating Pump for the central heating

8 Safety Valve

9 Pressure gauge

10 Flow switch

11 Filling Loop connection

12 Thermostatic High Temp. Limit Valve

13 Expansion Vessel

14 Diverting valve

15 Spacer for installation of Heat meter

16 Bypass valve

1 Districtconnectionblockinc.strainer

2 ElectronicPIDController

3 PICV(behindthecontroller)

4 CentralHeatingPlateHeatExchanger

5 DHWPlateHeatExchanger

6 AutomaticAirvent

7 CirculatingPumpforthecentralheating

8 SafetyValve

9 Pressuregauge

10 Flowswitch

11 FillingLoopconnection

12 ThermostaticHighTemp.LimitValve

13 ExpansionVessel

14 Divertingvalve

15 SpacerforinstallationofHeatmeter

16 Bypassvalve

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The Hiper HIU Operation

1 2 3

Switch on the Power SupplyWhenpowered-upforthefirsttime,thecontrollerwillgothroughadiagnosticscheckoftheHIU.Thismaylastafewsecondsandthedisplayshowsa‘timedout’rotatingsymbol(seeabove).Ifaproblemisdetectedthecontrollerwilldisplayan‘ERROR’symbol.(seeinstalleroruserguideforfulldetails

HIU is now on stand-byHavingcompleteditschecks,thecontrollerisnowreadytobeused.Untilademandiscreateditwillremaininstandbymode.

Turn on a hot water tapThehotwatertemperatureisfactorysetto55oC(theindustryrecommendedtemperature).OncetheHIUcontrollersenseswaterflowitwillcommencetheproductionofhotwaterimmediately,andstabiliseatthesettemperature.

Turn the tap off(nodemandforhotwater)

Thescreenwillshowthe‘standby’symbol(seeabove).

Room thermostat(callsforheating………..)

TheHIUnowoperatesinheatingmode,andthedisplayshowsthesetflowtemperature.Anydemandforhotwaterwilltakepriority.

1 2 3

Factory Settings•DHWSat55oC•CentralHeatingat60oC

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The Hiper HIU Technical Specification for Hiper Xi45 and Xi60

Technical Parameters Xi45 Xi60

PRIMARY(heatsupplyfromcommunalheatsource)MAXIMUMTEMPERATURE 16bar 16Bar

PRIMARY(heatsupplyfromcommunalheatsource)MAXIMUMpressuredifferential 90oC 90oC

SECONDARY(centralheatingcircuitintheflat,apartmentorhouse)MAXIMUMPRESSURE 4bar 4bar

SECONDARY(centralheatingcircuitintheflat,apartmentorhouse)MAXIMUMTEMPERATURE 3bar 3bar

SECONDARY(centralheatingcircuitintheflat,apartmentorhouse)TEMPERATUREADJUSTMENT 85oC 85oC

SECONDARY(centralheatingcircuitintheflat,apartmentorhouse)HEATINGOUTPUT 20oCto85oC 20oCto85oC

DOMESTICHOTWATER(includingcoldwatersupplymain)MAXIMUMPRESSURE 10Kw 10Kw

DOMESTICHOTWATER 60oC 60oC

MAXIMUMTEMPERATURELIMITEDbyTMVDOMESTICHOTWATER 30oCto65oC 30oCto65oC

TEMPERATUREADJUSTMENT 45kW 60kW

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The Hiper HIU Specification Planning List

Domestic Hot water specification Required Value submitted by the System Design House Actual confirmed

DHWLOAD(Kw)

DHWtemperaturerequirements

DHWflowraterequirements

Central Heating Specification Required Value submitted by the System Design House Actual confirmed

HeatingLOAD(Kw)

Heatingflowdesigntemperature

Primary (District) specification Required Value submitted by the System Design House

PRIMARY(District)Flowtempera-ture

PRIMARY(District)Returntemper-ature

PressureDropacrossthePrimaryFlowandreturn

Cold water Required Value submitted by the System Design House

ColdWater(inlet)designtempera-ture

ColdWater(inlet)designpressure

Additional Specification Required Value submitted by the System Design House

Pleaseforwarddetailsonthesystemwithyourenquiry(pleasevisitwww.mibec.co.uktocontactusorcallon1948661639.

Pleasecompletethetableasbelow,andwithanyadditionalinformationthatisrelevanttotheproject.Wecanneverhavetoomuch!

Mibec LimitedParkViewBusinessCentre

CombermereWhitchurchShropshire

UnitedKingdomSY134AL

Tel:+44(0)1948661639Fax:+44(0)1948871794

Web:www.mibec.co.uk

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