ASKOMA AHIR-BI-plus-3.5 User manual



Insulatedmounng
Screw‐inheaterR1½“
ASKOHEAT+
MV‐012‐6391.2   01.04.2022   www.askoma.com Page1
Fitting instructions, user manual and service
Screw‐in heater R 1½“ for drinking and heang water
1.75 to 5.2 kW
 AHIR‐BI‐plus‐1.75
 AHIR‐BI‐plus‐3.5
 AHIR‐BI‐plus‐4.4
 AHIR‐BI‐plus‐5.2
Index
GeneralsafetyandassemblyinformaonPage2
OperanginstruconsPage3
AssemblyinstruconsPage4
UsermanualPage5/6
OperangcondionsPage7
ElectricaldiagramPage8/9
ServicePage10
MalfunconPage10
Please keep in a safe place



Insulatedmounng
Screw‐inheaterR1½“
ASKOHEAT+
MV‐012‐6391.2   01.04.2022   www.askoma.com Page2
Assembly information

The device must be installed horizontally, an installaon from above or below is not permiet for
safety reasons.
Makesurethattheheangtubesareenrelycoveredbytheliquidbeforeplacingintooperaon.
Thecirculaonoftheliquidshallnotbeinhibited.

Operangdata,applicaon,dimensionsandmodelofthescrew‐inheaterareontheidenficaonpla‐
teandcircuitdiagramonthedevice,respecvelyinsidethehousingcover,orcanbefoundinthe
finginstrucons/usermanuals.

 Donotplacethedeviceintooperaonunlaerhavingreadtheusermanual.


 Thesedevicesmaybeusedbychildrenaged8ormoreandbypersonswithreducedphysical,senso‐
ryormentalcapacityorthoselackinginexperienceand/orknowledgeiftheyaresupervisedorif
theyhavebeeninstructedinsafeoperaonofthedeviceandunderstoodtheresultantdangers.
Childrenmaynotplaywiththedevice.Thedevicemaynotbecleanedorservicedbychildrenunless
theyaresupervised.
General safety information
Installation, setting and removal must be
carried out only by qualified electricians.
Applicable
standards
Safety:EN60335‐1/‐2‐21/‐2‐73
EMC:EN55014‐1/‐2
CEM:EN62233
IPCode:EN60529



Insulatedmounng
Screw‐inheaterR1½“
ASKOHEAT+
MV‐012‐6391.2   01.04.2022   www.askoma.com Page3
Operating instructions

Important information
Ifaheatexchangerisfiedinthesametank,thecontrollermustlimitthetemperaturecausedbythe
heatexchangerto85°C.Thispreventsthesafetytemperaturelimiterofthescrew‐inheatertripping.

Safety temperature limiter
Thesafetytemperaturelimitermaytripattemperatureslowerthanapprox.–15°C(e.g.transportaon
orstorage).Ifthishappens,presstheresetbuon.

The device may only be used to heat water.
Corrosion protection
Pleasenote:Thisheangelementisapplicableinstainlesssteelboileraswellasinblacksteel/black
steelenamelledboilers.SelectthesengsviaDIPswitchaccordingtotheboilertype.
Foraninstallaonoftheheangelementintoblacksteelorblacksteelenamelledboilers,theredslide
switch(DIPswitch)hastobeleinposion“Schwarzstahlspeicher”(factoryseng).
Wheninstallingtheheangelementintoastainlesssteelorchromesteelboiler,theslideswitch
(DIPswitch)hastobeswitchedtoposion“Edelstahlspeicher”.

Electrical connection
Thedeviceisintendedforfixedconnecononlyandmaybeconnectedonlytofixedcables.Selecta
cablecross‐seconsuitableforthepowerrangofthedevice.Allpolesofthedevicemustbeableto
bedisconnectedfromthemainsbymeansofanatleast3mmisolangdistance.ThePEwiremustbe
100mmlongerthantheotherconductors.

Maintenance
Formaintenanceoftheunitorreplacementofparts,thedevicemustbedisconnectedfromthepower
supply.Beforeopeningthecover,removeallplugsfromthedevice.
In the event of the following the guarantee is void:
‐ Notcomplyingwiththispaperwork„Finginstrucons,usermanual,andservice“
‐ Notcomplyingwiththestorageheatermanufacturer'sfinginstrucons
‐ Technicalmodificaons,repairsortamperingwiththedevice(includingexchangingthethermostat)
‐ Applicaonsforwhichthedevicewasnotdesigned
‐ Incorrectoperaonandmaintenance
‐ NotcomplyingwithdirecveVDI2035
‐ Manipulaonsontheoperangsoware
‐ Undocumentedparameterizaonsviathedocumentedinterfaces



Insulatedmounng
Screw‐inheaterR1½“
ASKOHEAT+
MV‐012‐6391.2   01.04.2022   www.askoma.com Page4
Assembly instructions
Assembly instructions
1. Screw in the screw‐in heater
‐Seal1½“threadwithsuitablesealingmaterialandscrewin
‐Alignheangelement,checkinstallaonposion—allelectricalconneconsontheboom
‐Forstainlesssteelstoragetanks,openthehousingcoverandchangethedipswitchinside
thedevice
‐Fillthetankandcheckforleaks
2. Connect the screw‐in heater electrically
‐Plug Z1—Connectthepowersupplytotheheangelementasfollows:
Connecon1:L1
Connecon2:L2
Connecon3:L3
ConneconN:N
ConneconPE:PE

‐Plug Z2—Temperaturesensor(oponal)
 Connecon1:Temperaturesensor1
Connecon2:Temperaturesensor2
Connecon3:Temperaturesensor3
Connecon4:Temperaturesensor4
Connecon5:GND
Connecon6:RelayK4


‐Plug Z3—Heatpumprequest/0‐10Vanaloguesignal(oponal)
 Connecon1:GND
Connecon2:Heatpumprequest
Connecon3:Analogueinput0‐10V
Connecon4:RS485:A
Connecon5:RS485:B
Connecon6:RS485:GND




Insulatedmounng
Screw‐inheaterR1½“
ASKOHEAT+
MV‐012‐6391.2   01.04.2022   www.askoma.com Page5
User manual for the user and qualified installer
Device description
TheASKOHEAT+canbeswitchedin7stagesusingdifferentcontrolsignals.

Thedevicecanbeswitchedonoroffmanuallyatanymeusingthe"Emergencybuon"(holddown
foratleast2seconds)(pos.2).This"emergency"modedeacvatesautomacallyaer24hours.

Analogueswitchingispossibleviaa0‐10Vinputorviathepotenal‐freecontact"HeatpumpRequest".


TheModbusprotocol(TCPviaLANorRTUviaRS485(Z3)andanAPIwithJSONdataareavailabledigi‐
tally.Adetaileddescriponisavailableandcanbedownloadedviaourhomepage.

Temperature control
Themaximumtemperaturecanbeconnuouslyadjustedwiththerotaryknob(pos.1).Therangeex‐
tendsfrom„Out“toapprox.85°C.Foreconomicreasons,itshouldbesettoapprox.65°C.
Whenthetemperatureisreached,thedeviceswitchesoffandonagainautomacallyifnecessary.

Safety temperatur limiter
Ifthesafetytemperaturelimiterhastripped,youcanresetitwitha"00screwdriver"throughthe
openingmarked"Reset".Thiscannotbedoneunlthetemperaturehascooleddownbyapprox.10K.

Emergency operation „Emergency On“
Themaximumheangoutputcanbeswitchedonimmediatelywiththe„EmergencyOn“buon.Todo
this,pressthebuonforatleast2seconds.Thismaybenecessaryintheeventofafaultorifaddio‐
nalheatisrequired.Toswitchoff,pressthebuonagainforatleast2seconds.Forsafetyreasons,the
ASKOHEAT+automacallyswitchesbacktonormaloperaonaer24hours.

Heat pump request
Aswitch‐onsignaloftheheatpumpcanbeconnectedtothispotenal‐freecontact1and2ofplugZ3.
Withthe"Heatpumprequest",themaximumheangpowercanbeswitchedonimmediately.From
devicefirmware4.3.3ordevicesbuiltaer2022,thiscontactcanalsobeusedforconnuousopera‐
on.Ifcontact1and2ofplugZ3arebridged,thedeviceheatsthewatertothepresettemperatureof
max.55°C.

Pos.1Temperaturecontrol
Pos.2EmergencyOn
Pos.3Resetbuon
Pos.4Operanglights



Insulatedmounng
Screw‐inheaterR1½“
ASKOHEAT+
MV‐012‐6391.2   01.04.2022   www.askoma.com Page6
Device integration into the local network

TheconneconismadeviaaCAT5orhighercablewithalocalnetwork.

WLANisnotsupported.

Normally,thereshouldbeadirectconnecontotherouterwithDHCPserver.

PowerlineconneconsorWLANbridgescancauseunexpectedproblemsandarenotrecommended.
(Supportinthesecasescannotbeprovided).

TosynchronisethelocalclockintheASKOHEAT+ andtobeabletocarryoutupdates,anInternetconnec‐
onisnecessary.Generally,thesystemalsoworkswithoutaLANand/orinternetconneconwithsignificant
limitaons.

Aersuccessfulconnecon,themiddleLED(Connecon)flashesyellow/green(ifthereisnoLAN
connecon,itflashesblue).
IfonlyoneASKOHEAT+ isinstalled,itcanbeaddressedwithmostroutersasfollowsinabrowser
windowofaterminalconnectedtotheLAN:
hp://askoheat‐eth
hp://askoheat.local
InnetworkswithseveralASKOHEAT+ orifthelocalhostnameresoluondoesnot(correctly)work,
theassignedIPaddresscanbefoundintheroutermenuformostcommerciallyavailablesystems(the
devicesarethenidenfiedbythename"askoheat"or,inexceponalcases,"espressif",idenfysome‐
mesonlypaenttrialanderrorhelps).

Example:192.168.0.23‐>thenenterthisinthebrowserasfollows:hp://192.168.0.23

AnIPscannercanalsoprovidegoodservice.
IfthedevicewebsitecanbeseenaerenteringtheIPaddressorthestandardhostna‐
mes,ASKOHEAT+ canbesetup.
User manual for the user and qualified installer



Insulatedmounng
Screw‐inheaterR1½“
ASKOHEAT+
MV‐012‐6391.2   01.04.2022   www.askoma.com Page7
Operating conditions
LED 1: STATUS
Blue   Communicaonoverethernet(MODBUSTCP,RTU,webbrowserorHTTP‐JSON
(e.g.EnergyManager)withinlast5seconds
Red—Flashing  Error,forfurtherinformaonopenthelocalwebpagesofASKOHEAT+
White—Flashing Idenfyfor20secondsorEmergencyModetogglesonoroff/veryfastflashing
atstartandstopupdate

LED 2: CONNECTION

Red Connecontolocalnetwork(LAN)
Green LAN(Ethernet)connectedtoaswitch,huborrouter
Yellow‐flashing DatacommunicaonoverLAN(Ethernet)
Blue‐flashing ASKOHEAT+isrunningwithoutLANconnecon,e.g.usingonlyanaloginput

LED 3: MODE
Yellow Heaterrelaisareacve,butwithoutcurrentflow(switch‐offbythermostat)
Green  Heaterisacvewithcurrentflow
Blue‐flashing EmergencyModeisacve
White Idenfyfor20secondsorEmergencyModetogglesonoroff/veryfastflashing
atstartandstopupdate



Insulatedmounng
Screw‐inheaterR1½“
ASKOHEAT+
MV‐012‐6391.2   01.04.2022   www.askoma.com Page8
Electrical diagram
WARNING! Allpowersupplycircuitsmusthavebeenswitchedoffbeforeaccessing
theconneconterminals.
Electrical and connecon diagram 1.75 kW
 AHIR‐BI‐plus‐1.75



Insulatedmounng
Screw‐inheaterR1½“
ASKOHEAT+
MV‐012‐6391.2   01.04.2022   www.askoma.com Page9
Electrical diagram
WARNING! Allpowersupplycircuitsmusthavebeenswitchedoffbeforeaccessing
theconneconterminals.
Electrical and connecon diagram 3.5 kW ‐5.2 kW
 AHIR‐BI‐plus‐3.5
 AHIR‐BI‐plus‐4.4
 AHIR‐BI‐plus‐5.2



Insulatedmounng
Screw‐inheaterR1½“
ASKOHEAT+
MV‐012‐6391.2   01.04.2022   www.askoma.com Page10
Service
1.
2.
Malfunction
Reset
For technical data see the data sheet Subject to technical alteraons
Seeusermanualforthe
qualifiedinstaller.
Thedevicemustbe
cleaned(descaled)with
asuitableprofessional
descalingagent,e.g.
citricacid.
Ifthesafetytemperature
limitertrips,thereisafault
orerror.Aqualifiedexpert
mustinspectthesystemin
thiscase.
2x / year
Whentheheaterisusedinhardwaterareasitmustbe
regularlydescaled.
It is imperave that the local circumstances are paid aen‐
on to.
Thebuildupofscaleintheheangelementcanleadtothe
acvaonofthesafetytemperaturelimiterorthermal
overloadingtherebydestroyingtheheangelements.
In such cases the guarantee is not valid!
New
Needs cleaning
The version currently valid can be downloaded under "Downloads" from our homepage