Biasi M90E.24S User manual

Usermanualand
Installationinstructions
RIVACOMPACT
Models:
M90E.24S
M90E.28S
M90E.32S

Congratulationsonyourchoice.
Yourboileriselectronicallycontrolledandhaselectronicignition.
Thematerialsitismadeofandthecontrolsystemsitisequippedwithgiveyousafety,ahigh
levelofcomfortandenergysavingstoallowyoutoget thegreatestbenefitoutofindependent
heating.
Rememberthat...
nThemanualmustbereadthoroughly,so
thatyouwill beabletousetheboilerinasafe
andsensibleway;
mustbecarefullykept.Itmaybenecessary
for referenceinthefuture.
nFirstlightingupmustbecarriedoutby
competentandresponsible engineer.
nThemanufacturerdisclaimall liabilityfor
anytranslationsofthepresentmanualfrom
whichincorrectinterpretationmayoccur;
cannotbeheldresponsiblefornon---observ-
anceofinstructionscontainedinthismanual
orfortheconsequencesofanyprocedure
notspecificallydescribed.
Usingtheboiler...
nBeforelightingtheboiler,youaread-
visedtohaveaprofessionallyqualified per-
soncheckthat theinstallationofthegas
supply:
---isgas---tight;
---isofthecorrectgaugefortheflowtothe
boiler;
---isfittedwithall thesafetyandcontrolde-
vicesrequired bythecurrentRegulations;
Ensurethat theinstallerhasconnectedthe
pressurereliefvalveoutlet toadrainpipe.
Themanufacturersarenotresponsiblefor
damagecaused byopeningofthepressure
reliefvalveandconsequentescapeofwater,
ifnotconnectedcorrectlytothedrain.
nOndetectingthesmell ofgas
--- don’toperateanyelectricalswitches,the
telephoneoranydevicethatmayproduce
sparks;
--- openthewindowsand doorsatonceto
createadraughtofairwhichwill purgethe
area;
--- shutoff thegascocks;
--- get theassistanceofaqualified person.
nDonot touchtheappliancewithpartsof
thebodythatarewetordampand/orbare
feet.
nIncaseofstructuralworkormainten-
ancenearthe exhaustductand/orfume ex-
haustdevicesortheirattachments,turnoff
theappliance.Oncompletionofthework,
haveaprofessionallyqualified personcheck
theirefficiency.
nRepairs(underguarantee)mustbecar-
riedoutonlybyanapprovedengineer,using
genuinespareparts.Thusdonomorethan
switchingoff theboileryourself(see thein-
structions).
nYourboilerallowsheatingupofwaterto
atemperatureless thanboilingpoint;
--- mustbeconnectedtoacentralheating
systemand/orahotwatersupplysystem,
compatiblewithitsperformanceandoutput;
--- canbeusedonlyforthosepurposesfor
whichithasbeenspeciallydesigned;
--- mustnotbetouched bychildrenorby
thoseunfamiliarwithitsoperation;
--- mustnotbe exposedtoweathercondi-
tions.

Safehandlingof
substances
Biasiproductsaremanufacturedinaccordance
withISO9000 and donot,andwill not,containany
hazardousmaterialsorsubstances suchasas-
bestos,mercuryorC.F.C.’s.
Theappliancepackagingdoesnotcontainany
substances,whichmaybeconsideredahazardto
health.
Combustionchamberpanels
Material:mineralfibers
Known hazards--- Somepeoplecansuffer red-
deninganditchingoftheskin.Fibre entryintothe
eyewill causeforeignbodyirritation,whichcan
causesevereirritationtopeoplewearingcontact
lenses.Irritationtorespiratorytract.
Precautions--- Dustgoggleswill protecteyes.
Peoplewithahistoryofskincomplaintsmaybe
particularlysusceptibletoirritation.Highdustle-
velsareonlylikelytoarisefollowingharshab-
rasion.Ingeneral,normalhandlingandusewill
notpresenthighrisk,followgoodhygieneprac-
tices,wash handsbefore,touchingeyes,consum-
ingfood,drinkingorusingthetoilet.
Firstaid--- Medicalattentionmustbesoughtfol-
lowingeyecontactorprolongedreddeningofthe
skin.
Thermostat/Temperaturegauge
Description--- Sealed phialandcapillarycontain-
ingliquid.
Known hazards--- irritatingtoskin,eyesand
throat.Vapourisharmful.Inflammable--- donot
extinguishwithwater.
Precautions--- Donotincinerate.Avoidcontact
withbroken/leakingphials.Donotpurposely
puncture.
Firstaidmedicalattentionmustbesoughtfollow-
ingeyes/skincontact,washwithcleanwater.
AppliancecategoryII2H3+GasG20 20 mbar,G30 29 mbar,G31 37 mbar
Countryofdestination:UnitedKingdom
ThisapplianceconformswiththeEECdirective90/396 and,consequently,ithastheright tomakeuse
ofthebrandname
Moreover,theapplianceconformswiththeEECdirective87/308 relativetothepreventionandelimina-
tionofradiodisturbances.
Theapplianceisbuilt tocomplywiththeregulation nowinforceregarding gasappliance’s safetyand
theEuropeanregulation nowinforcerelativetosafetyofhouseholdandsimilarelectricalappliances.
Themanufacturer,inthecontinuouspocess toimprovehisproducts,reservestheright tomodifythe
dataexpressedinthepresentdocumentationatanytimeandwithoutpriornotice.
Thepresentdocumentationisaninformativesupportanditcannotbeconsideredasacontract to-
wardsthird parties.

Boilerinstallationandcommissioningtips
nTheinstallationmustbecarriedoutby
aqualified personwhowill beresponsiblefor
observingthecurrentRegulations.
Installingtheboiler...
nDonotforget toremovethetransitcaps
and plugsfromtheboilerconnectionsthese
arefittedtoeveryboiler.
nKeeptheboilerclearofdustduringin-
stallationandinparticulardonotallowany
dustordebristoenterthetopoftheboiler
wheretheflueconnectionismade.Itisrec-
ommendedthatyouputadustsheetoverthe
topoftheboileruntilyouarereadytomake
theflueconnection.
nBecause everyboilerisfiredandtested
liveat thefactory,asmall amountofwater re-
mainswithintheboiler.Itispossibleforthis
watertoinitiallycausethepumptoseize.Itis
thereforerecommendedthat thepumprotor
bemanuallyturnedtofree itsrotationbefore
turningtheboileron.
nRemembertoreleasetheautoairpurge
beforefillingtheboiler.See theinstructionsto
identifythelocationofthisdevice.
nDonotremovethecapofthepressure
testpointsoftheairswitch(topleftsideofthe
boiler).
nYouarestronglyadvisedtoflushout the
systembothcoldandhotinordertoremove
systemandinstallationdebris.
nItisalsosensibletoinitiallyfireandcom-
missiontheboilerbeforeconnectinganyex-
ternalcontrols suchasaroomthermostat.By
thismethodifyou haveasubsequentprob-
lemfollowingtheadditionofanexternalcon-
trolyoucaneliminatetheboilerfromyour
faultanalysis.
nDonotforget torangeratetheboilerto
suit thesystemrequirements.Thispro-
cedureiscoveredinthecommissioningsec-
tionoftheinstallationmanual.
nIftheboilerisfittedwithadigitalpro-
grammer,whensettingthetimesforauto-
maticoperation,rememberthatforevery
“ON”timetheremustbean“OFF”timetofol-
lowandthatoneveryoccasionyouentera
timeyoumustalsoindicatewhichdaysthat
youwant theboilertofollowthetimedset-
tings.
nSomeproductsincorporateananticycl-
ingtimedelay.Itisnormalwhenfirstswitch-
ingtheboileronfortheboilerto operateon
heatingforafewsecondsthenswitchoff.
After3---4minuteshaselapsedtheboilerwill
thenreigniteandoperateperfectlynormally.
Theignitiondelaycycledoesnotprevent
normaloperationoftheboilertoprovide
d.h.w.
nIfyouareinanydoubtsastotheinstalla-
tionoroperationoftheboilerpleasereadthe
instructionmanualsthoroughlyandthenif
necessarycontactBiasiUKforadviceand
assistance.
Pleaserememberthatifyouareinanydoubtabout theinstallationofthisproductyoucancontactour
TechnicalHelplineontel.01902 304400

TABLEOFCONTENTS
1Appliancedescription1..........
1.1Overview1......................
1.2Controlpanel1..................
1.3Isolationvalves1.................
1.4Technicaldata1.................
2Instructionsforuse2............
2.1Warnings2......................
2.2Refillingprocedure2..............
2.3Ignition3........................
2.4C.h.circuit temperature3..........
2.5D.h.w.temperature4..............
2.6Extinguishing4..................
2.7Builtintimeswitch5..............
3Usefuladvice7.................
3.1Centralheating7.................
3.2Frostprotection7................
3.3Periodicmaintenance7...........
3.4Externalcleaning7...............
3.5Operationalfaults7...............
4Technicalinformation9..........
4.1Overview9......................
4.2Maindiagram10..................
4.3Hydraulicspecifications11.........
4.4Expansionvessel11...............
4.5Technicaldatamod.M90E.24S12...
4.6Technicaldatamod.M90E.28S14...
4.7TechnicaldataM90E.32S16........
5Generalrequirements18..........
5.1Related documents18.............
5.2Locationofappliance18...........
5.3Fluesystem18....................
5.4Gas supply19....................
5.5Airsupply19.....................
5.6Ventilation19.....................
5.7Watercirculation(c.h.)19...........
5.8Domesticwater20.................
5.9Watertreatment20................
5.10 Electricalsupply20................
6Installation21....................
6.1Warnings21......................
6.2Precautionsforinstallation21.......
6.3Installingthebracket21............
6.4Overall dimensions22.............
6.5Joints22.........................
6.6Mountingtheboiler22.............
6.7Fittingthefluesystem23...........
6.8Fluerestrictors23.................
6.9Choiceof flue23..................
6.10 Electricalconnections25...........
6.11 Externalfrostprotection27.........
7Commissioning28...............
7.1Electricalinstallation28............
7.2Gas supplyinstallation28..........
7.3Fillingthed.h.w.system28.........
7.4Initialfillingofthesystem28........
7.5Lightingtheboiler29..............
7.6Checkingthegaspressure
at theburner29...................
7.7Adjustingtheburnerignition30.....
7.8Adjustmentofusefulc.h.output30. .
7.9Checkingtheignitiondevice31.....
7.10 Checkingthefluesystem32........
7.11 Instructingtheuser32.............
8Gasconversion33...............
8.1Warnings33......................
8.2Procedures33....................
9Maintenance34..................
9.1Warnings34......................
9.2Dismantlingthe externalpanels34...
9.3Emptyingthed.h.w.system34......
9.4Emptyingthec.h.system34........
9.5Combustionanalysischeck35......
9.6Cleaningtheprimaryheatexchanger35
9.7Checkingthepressurisation
inthe expansionvessel36..........
9.8Cleaningtheburner36.............
9.9Checkingtheflue36...............
9.10 Visualinspectionofappliance36. . . .
9.11 Gaspressuresandsoundness 36...
Abbreviationsusedinthemanual
C.h.=Centralheating
D.h.w.=Domestichotwater
D.c.w.=Domestic coldwater
USE
INSTALLATIONMAINTENANCE

1APPLIANCEDESCRIPTION
1
1.1Overview
2
1
3
Fig.1.1
1Casefrontpanel
2Controlpanel
3Controlpanelcover
1.2Controlpanel
4C.h.circuit temperatureand pressuregauge
5Timeswitch(c.h.control)
6Lock---outsignal lamp
7Lockoutresetbutton
8Functionselectorandc.h.temperaturecontrol
knob
9D.h.w.temperaturecontrolknob
10 Applianceoperationlight
1.3Isolationvalves
13 1115 1214
Fig.1.2(bottomviewoftheboiler)
11 C.h.returnvalve
12 D.c.w.inletvalve
13 Gasinletvalve
14 D.h.w.outletpipe
15 C.h.flowvalve
1.4Technicaldata
Fordetailedtechnicaldatasee section4.5or4.6
ofthismanual.
10 89 7 6 45
Fig.1.3
USE

2INSTRUCTIONSFORUSE
2
2.1Warnings
BiasiUKLtdsupport theBenchmarkinitiat-
ive.TheBenchmarkLogBookislocatedat
thebackofthismanualandshouldbecom-
pletedbytheInstalling/Commisssioning
EngineerandhandedovertotheUserfor
futurereferencebyothervisitingEn-
gineers.AlsoincludedistheServiceInter-
valRecordcardthatshouldbecompleted
bytheServiceEngineerfollowingthean-
nualservicemaintenanceoftheboilerand
system.
All CORGIRegisteredInstallerscarrya
CORGI IDcard,andhavearegistration
number.Bothshouldberecordedinyour
BenchmarkLogBook.Youcancheckyour
installerisregisteredbycallingCORGIdi-
recton01256 372300.
Inordertoguarantee safetyandcorrectoper-
ation,itisessentialthatall thetestsarecarried
outbyacompetentandresponsibleservice
engineerbeforelightinguptheboiler.
Thetestsaredescribedintheinstallationin-
structionsinsection7commissioning.
Ensurethat thec.h.circuitisregularlyfilled
withwater(eveniftheboilerisonlyusedfor
d.h.w.supply)checkingthat thepressureindi-
catedonthetemperatureand pressuregauge
4isnotlowerthanthatshowninFig.2.2.
Ifthepressurereadingonthepressuregauge
isbelowthatshowninFig.2.2,thenthesystem
will requiretoppingup.Afillingloopisnormally
provided bytheinstallerforthispurpose.
Ifyouareinanydoubtregardingthispro-
cedureyouareadvisedtocontactyourIn-
stalleroranApprovedEngineer.
Thisapplianceisprovidedwithabuiltinanti---
freezesystemthatoperatestheboilerwhen
thetemperatureisbelow4°C
Therefore,whentheboilerisnotlitorusedin
coldweather,withconsequentriskof freezing
donotswitchoff theboilerat thefusedspur
isolationswitchorclosethegasinletcock.
Whenyoudonotexpect tousetheboilerfora
longperiodandtheboilerisnot tobeusedfor
frostprotectionthenfollowtheinstructions
giveninsection2.6onpage4.
2.2Refillingprocedure
1Isolatetheboilerfromthe electricalsupplyat
thefusedspur.Reconnect thefillingloopas
demonstratedinFig.2.1.
Temporary
connection
Controlvalve
Controlvalve
Doublecheckvalve
Supplypipe
(coldwaterinlet)
C.h.returnpipe
Fig.2.1
2Openthevalvesofthefillingloopandwatch
thegaugeuntilitreachesnormalfillingpres-
sureas showninFig.2.2.
4
Normalfilling
pressure
Fig.2.2
3Closethevalvesandremovethefillingloop.
Ifyouexperienceanydifficultywiththeoper-
ationoftheboiler,switchoff theboilerimmedi-
atelyat thefusedspurisolationswitchand
contactyourInstalleroranapprovedService
Engineer
Airintroducedintotheboilerduringthisfillingpro-
cess will vent throughtheautomaticairpurger
fittedtotheboiler.Youmayalsofinditnecessary
toventairfromyour radiatorcircuitusingyour
radiatorkey,howeverbeawarethatexcessive
ventingwill causethepressureinthesystemto
drop.
Alwaysensurethat thepressuregaugeis setat the
required pressure.
USE

Instructionsforuse
3
2.3Ignition
1Checkthat thevalveslocatedinthelowerpart
oftheboilerareopen(Fig.2.3).
Openposition
Fig.2.3
2Turnonthe electricitysupplytotheboiler,
switchingonthefusedspurisolationswitch.
Theapplianceoperationlight10 (Fig.2.4)will
flashevery4seconds(stand---bycondition).
3Iftheboileristobeusedforc.h.and d.h.wposi-
tionthefunctionselector8asinFig.2.4.
Theapplianceoperationlight10 will flash
every2seconds(operatingboiler).
810
Fig.2.4
4Ifd.h.w.supplyonlyisrequired,positionthe
functionselector8asinFig.2.5.
Theapplianceoperationlight10 will flash
every2seconds(operatingboiler).
810
Fig.2.5
2.4C.h.circuit temperature
Theoutput temperatureofc.h.waterisadjustable
fromaminimumofabout38°Ctoamaximumof
about85°C(Fig.2.6),byturningthefunctionse-
lector(8).
Adjustmentofc.h.outputontheboilerisauto-
matic.Thegreatestoutputpre---setinthefactory
can,however,bereducedinlevelaccordingto
actualsystemrequirements;thisdoesnotaffect
themaximumoutputind.h.w.operation.
Suchadjustmentsmustbecarriedoutbyaquali-
fied person;thereforeweadviseyoutocontact
yourinstallerorServiceAgent.
Adjustmentoftheboilertemperaturealtersthe
gasflowat theburneraccordingtothethermalde-
mandinthesystem.Soitisusualtosee theburner
litat theminimumlevelformoreorless long
periods.
Minimum
Maximum
Fig.2.6
Adjustment
Inordertoachieveoptimalsettingsforeconomy
andcomfort,werecommendadjustingtheoper-
atingtemperatureofthec.h.wateraccordingto
theoutsidetemperature,positioningtheknobas
follows:
Lowerthan
--- 5°C
From5to15 °CBetween
--- 5and+5°C
Fig.2.7
USE

Instructionsforuse
4
Yourqualifiedinstallerwill beabletorecommend
themostsuitableadjustmentforyoursystem.
Thetemperatureand pressuregauge(4,Fig.1.3
onpage1)will allowyoutocheckthat theset tem-
peratureisobtained.
2.5D.h.w.temperature
Thetemperatureofthed.h.w.leavingtheboiler
canbevariedfromaminimumofabout35°Ctoa
maximumofabout55°C(Fig.2.8),byturningthe
temperaturecontrolknob9.
Minimum
Maximum
9
Fig.2.8
Adjustmentofthed.h.w.temperatureiscomplete-
lyseparatefromthatofthec.h.circuit.
Theadjustmentsystemintegratedwithinthe
boilerautomaticallycontrolstheflowofgastothe
burnerinordertokeepthetemperatureofd.h.w.
deliveredconstant,betweenthelimitsofmaxi-
mumandminimumoutput.
Wherethedemandisatalowlevelorwiththetem-
peratureset totheminimum,itisnormaltosee a
cycleoflightingandextinguishingoftheburner
whenrunning.
Adjustment
Itisadvisabletoadjust thed.h.w.temperatureto
alevelcommensuratewiththedemand,minimis-
ingtheneedtomixwithcoldwater.Inthisway,the
automatic controlfacilitieswill befullyexploited.
Moreover,wheretheamountoflimescalepresent
inthewatermaybeparticularlygreat,notexceed-
ingthepositioninFig.2.9ofthed.h.w.tempera-
turecontrolknob9correspondingtoabout50°C
(Fig.2.9),minimisesannoyingincidencesofscale
depositsandclogging.
9
Fig.2.9
Inthesecases,however,itisadvisabletoinstall a
small watertreatmentdeviceorsoftener.With
suchadeviceyoushouldavoid periodicdescal-
ing.
Consequently,thed.h.w.heatexchangerwill keep
itsperformanceconsistentforalongerperiodof
timewithresulting gas savings.
Ifthedemandford.h.w.is sogreatastoprevent
reachingahighenoughtemperature,havetheap-
propriateoutputlimitingvalveinstalled by yourin-
stalleroranAuthorisedServiceEngineer.
2.6Extinguishing
Toturntheboileroff set thefunctionselector8to
thepositionshowninFig.2.10.
Theapplianceoperationlight10 will flashevery4
seconds.
810
Fig.2.10
Whenyoudonotexpect tousetheboilerforalong
period:
1Switchoff the electricitysupplytotheboiler,by
meansofthefusedspurisolationswitch;
2Shutoff thegas supplycock13 andthevalves
forthewatercircuitsfittedundertheboiler
(Fig.2.11).
USE

Instructionsforuse
5
3Emptythewatercircuits,ifnecessary,as
shownintheinstallationinstructionsinthesec-
tionmaintenance.
Closed position
13
Fig.2.11
2.7Builtintimeswitch
Thecombiboilersare equippedwithabuiltinelec-
tronictimeswitch(5,Fig.1.3onpage1)which
controlsthec.h.operation.
H
A
BCDEF
G
Fig.2.12
Displayandcontrolpanel
AModeselectorswitch
BResetbutton
CEnterbutton
DIncrease“+”settingbutton
EDecrease“--- ”settingbutton
FOn---off button
GTimedisplay
HON--- OFF display
Settingthecurrent time
Note:withanewunitorwhentheresetbuttonB
hasbeenpressedandtheselectorswitchAisto
theposition,thetimedisplayGisflashing.
Set themodeselectorswitchAtotheposition
and press thebuttonsDorEuntilthecurrent time
appearsinthedisplayG.
TheclockstartsbymovingtheswitchAtothe
AUTOposition.
SettingexampleshowninFig.2.13:
Current time16.30.
A
Fig.2.13
Settingtheswitchingtime
20 memorylocationsareavailable,corresponding
to10 on--- off sequences.
Set themodeselectorswitchAtotheC1position.
Thesymbols showninFig.2.14 appearsinthe
display.
A
Fig.2.14
Press thebuttonsDorEtoset thedesiredON
time.
Press the“enter”buttonCtoconfirmthesetting
andtocontinueprogrammingtheOFF time.
Set theOFF timeasexplainedabovefortheON
settingandconfirmbypressingthe“enter”button
C.Proceedinthesamewayforothersettings.
SettingexampleshowninFig.2.15:
A--- ONtime7.45.
B--- OFF time10.30.
USE

Instructionsforuse
6
AB
Fig.2.15
Activatingthetimedsettings
Set themodeselectorswitchAtotheAUTOposi-
tionshowninFig.2.16.
Thecurrent timeappearsinthedisplay.TheON---
OFF displayHindicatesthecurrentstateofoper-
ation(accordingtothesettings).
A
Fig.2.16
Note:whenthemodeselectorswitchAisinthe
AUTOpositionandtheboileris switchedoff at the
fusedspurisolationswitch,thedisplayHindicates
onlytheOFF state.Theotherindicationsare
blanked.
Readingthetimedsettings
Set themodeselectorswitchAtotheC1position.
Thesymbols showninFig.2.14 appearsinthe
display.
Press the“enter”buttonC.Eachtimethebutton
ispressedthedisplayshowsthedetailsofthenext
setting.
Changingordeletingthetimedsettings
Set themodeselectorswitchAtotheC1position.
Thesymbols showninFig.2.14 appearsinthe
display.
Press the“enter”buttonCuntilthedisplayshows
thesettingtobemodifiedordeleted.
Thetimesettingcanbemodifiednowbypressing
buttonDorEandtheoperationcanbeswitched
onoroff bypressingthebuttonF.
Todeleteatimesetpress thebuttonDorEuntilthe
symbols showninFig.2.14 appearsinthetime
displayG.
Thenewsettigsarememorized bymovingthe
switchAtoadifferentposition.
Manualoperation
Theoperationofthetimeswitchcanbeforcedon
oroff constantlyorforatimed period.
Toforceconstantlyonoroff thetimeroperation
set themodeselectorswitchAtotheTIMERposi-
tion.Thesymbols showninFig.2.17 appearson
thedisplay.
Fig.2.17
Theoperationcanbeswitched permanentlyonor
off bypressingthebuttonFandleavingtheswitch
AintheTIMERposition.
Toforceatimed delayonoroff operation,set the
modeselectorswitchAintheTIMERposition.
Set thetimedelaybypressingthebuttonDorE
andtheoperationcanbeforcedonoroff bypres-
singthebuttonF.
Thetimedelaycanbesetwithinthefollowing
ranges:
1to23 hourswithstepsof1hour
1to27 dayswithstepsof1day
Thetimedelaysettingisactivated bymovingthe
switchAtotheAUTOposition.
TheON---OFF displayHflashesindicatingthat the
currentstateofoperation hasbeenforced.
Todeletethetimed delaysetting,set themodese-
lectorswitchAintheTIMERposition,press the
buttonDorEuntilthesymbols showninFig.2.17
appearsinthedisplayandthenset themodese-
lectorswitchAtotheAUTOposition
SettingexampleshowninFig.2.18:
forcedONstatefor4hours.
Fig.2.18
Resetting
Tocompletelyreset thetimer,press theresetbut-
tonwithapointedobject(pencil).
CAUTION:pushingtheresetbuttonwill complete-
lyerasethesettingsaswell asall thedata,includ-
ingthecurrent time.
USE

3USEFULADVICE
7
3.1Centralheating
For reasonablyeconomicalserviceinstall aroom
thermostat.
Nevershutoff theradiatorintheareawherethe
roomthermostatisinstalled.
Ifaradiator(oraconvector)doesnotheatup,
checkthatnoairispresentinitandthatitsvalve
isopen.
Iftheambient temperatureistoo high,donotalter
theradiatorvalves.Reducethecentralheating
temperatureinstead bymeansoftheroomther-
mostatandthefunctionselector(8inFig.3.1).
8
Fig.3.1
3.2Frostprotection
Thisapplianceisprovidedwithabuiltinanti---
freezesystemthatoperatestheboilerwhenthe
temperatureisbelow4°C
Therefore,whentheboilerisnotlitandusedin
coldweather,withconsequentriskof freezingdo
notswitchoff theboilerat thefusedspurisola-
tionswitchorclosethegasinletcock.
3.3Periodicmaintenance
Forefficientandcontinuousoperationofthe
boiler,itisadvisabletoarrangemaintenanceand
cleaningbyanAuthorisedServiceCentreEn-
gineer,atleastonceayear.
Duringtheservice,themostimportantcompo-
nentsoftheboilerwill beinspectedandcleaned.
This servicecanbepartofamaintenancecon-
tract.
Inparticular,youareadvisedtohavethefollowing
checkscarriedout:
--- primaryheatexchanger;
--- domestichotwaterheatexchanger;
--- burner;
--- exhaustfumeductandflue;
--- pressurisationofthe expansiontank;
--- fillingupofthecentralheatingcircuit;
--- bleedingofairfromthecentralheatingsystem;
--- generalcheckoftheappliance’soperation.
3.4Externalcleaning
Beforecarryingoutanycleaning,disconnect the
appliancefromthe electricalmains,usingthe
fusedspurisolationswitchfittedadjacent tothe
appliance.
Tocleanthe externalpanels,useaclothsoakedin
soapywater.Donotusesolvents,abrasivepowd-
ersorsponges.
Donotcarryoutcleaningoftheapplianceand/or
itspartswithreadilyflammablesubstances(for
examplepetrol,alcohols,naphtha,etc.).
3.5Operationalfaults
Ifthelock---outsignal lampcomeson
thisindicatesthat thesafetylock---out6(Fig.3.2)
has stoppedtheboiler
Tore---start theboiler,itisnecessarytopress the
boiler resetbutton7(Fig.3.2).
7
6
Fig.3.2
Forthefirstlightingupandfollowingmaintenance
proceduresforthegas supply,itmaybenecess-
arytorepeat theresettingoperationseveraltimes
soastoremovetheairpresentinthepipework.
Ifnoisesduetoairbubblesareheard during
operation...
youshouldcheckthat thepressureonthetem-
peratureand pressuregauge(Fig.2.2onpage2)
isnotbelowthecorrectsetting.
Ifrequired,topupthesystemcorrectly,asde-
scribedinthesection2.2ofthismanual.
Bleedanyairpresentintheradiators,ifnecessary.
Ifthepressureonthetemperatureandpres-
suregauge(4onpage1)hasgonedown...
itisnecessarytotopuptheappliancewithwater
again,soastoraisethepressuretoanadequate
levelasdescribedinthesection2.2ofthismanual.
Iftoppingupwithwaterhastobedoneveryfre-
quently,havethesystemcheckedforleaks.
USE

Usefuladvice
8
Ifwatercomesoutofthepressurereliefvalve
Checkonthetemperatureand pressuregauge(4
onpage1)that thepressureinthecentralheating
circuitisnotcloseto3bars.Inthiscase,tempera-
tureriseinthecircuitcancausethepressurerelief
valveto open.
Sothat thisdoesnothappenandtodecreasethe
pressuretoanormalvalue,itisadvisabletovent
someofthewaterintheappliancethroughthe
bleedvalvespresentintheradiators.
Ifintime,areductionindomestichotwater
supplyisobserved...
Thelikelycausesmaybeimpuritiescaughtinthe
domestichotwaterflowswitchfilterorlimescale
depositedinthedomestichotwaterheatex-
changer.Itisadvisabletohavetheappliance
cleanedoutbyanAuthorisedServiceCentreEn-
gineer.
Ifwatershouldoccasionallyleakfromthe
boiler...
shutoff thevalvespositionedundertheboiler
(Fig.2.11 onpage5)andcall anAuthorisedSer-
viceCentreEngineer.
Iftheapplianceoperationlight10 (Fig.3.3)
flashesveryquicklytheboilerisfaulty.
10
Fig.3.3
Inthiscaseorincaseofproblemsotherthan
thosementionedhere,switchoff theboiler,as
describedinsection2.6onpage4andcall a
competentandresponsibleservice engineer.
USE

4TECHNICALINFORMATION
9
4.1Overview
17
31
30
28
29
24
27
21
3
5
26
25 1822
3
4
19 16
3
2
3
3
2023
Fig.4.1
11 C.h.returnvalve
12 Domestic coldwaterinletvalve
13 Gasinletvalve
14 D.h.w.outletpipe
15 C.h.flowvalve
16 D.h.w.temperatureprobeNTC
17 Maincircuitdrainvalve
18 C.h.pressurereliefvalve
19 Pump
20 Pumpventplug
21 Automaticairpurgervalve
22 D.h.w.flowswitch
23 Modulationgasvalve
24 Primarycircuitflowswitch
25 C.h.temperatureprobeNTC
26 Three---waydivertervalve
27 Flame--- detectingelectrode
28 Ignitionelectrodes
29 Burner
30 Combustionchamber
31 Primaryheatexchanger
32 Airpressureswitch
33 Airswitchpressuretestpoints
34 Fan
35 Safetythermostat
36 Modulationoperator
37 Gasvalveoutletpressuretestpoint
38 Gasvalveinletpressuretestpoint
39 D.h.w.heatexchanger
40 C.h.expansiontank
41 By--- pass valve
42 Venturidevice
43 Domesticwatercircuitfilter
44 D.h.w.flowlimiter
45 Flueoutletpipe
46 Airintakepipe
INSTALLATION

Technicalinformation
10
4.2Maindiagram
42
32
46
45
24
31
28
37
19
18
22
23
38
21
26
39
41
43
11 12 15
13
40
34
27
25
16
14
36
35
29
17
44
Fig.4.2
INSTALLATION

Technicalinformation
11
4.3Hydraulicspecifications
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0 200 400 600 800 1000 1200 1400
0
10
20
30
40
kPabar
l/h
60
50
Fig.4.3
ThehydraulicspecificationsinFig.4.3represent
thepressure(availableheadforthecentralheat-
ingsystem)asafunctionoftheflowrate.
Theloadloss duetotheboilerhasalreadybeen
subtracted.
Outputwiththermostatcocks shutoff
Theboilerisfittedwithanautomaticby---pass
valve(41 onpage9),whichprotectstheprimary
heatexchanger.
Incaseofexcessivereductionortotalblockageof
watercirculationinthecentralheatingsystem
owingtoclosureofthethermostaticvalvesorsys-
temcomponentcocks,theby---pass valve ensur-
esaminimumflowofwaterthroughtheprimary
heatexchanger.
4.4Expansionvessel
Note:thisboilerisdesignedforoperationonly
inasealedcentralheatingsystem
Theheightdifferencebetweenthepressurerelief
valveandthehighestpointinthesystem maybe
7matmost.
Forgreaterdifferences,increasethepre--- load
pressureinthe expansionvessel(40 onpage9)
andthesystem,whencold,by0.1barforeach
additional1m.
Capacityl6,0
Pre--- load pressurekPa
bar
100
1,0
Maximumvolumeofwater
inthesystem*l132
Tab.4.1
*Whereconditionsare:
--- Averagemaximumtemperatureofthesystem
is80°C
--- Initialtemperaturewhenfillingupthesystemis
10°C
Forsystemswithvolumesgreaterthan132l,an
additionalexpansionvesselmustbeprovided.
INSTALLATION

Technicalinformation
12
4.5Technicaldata
mod.M90E.24S
NominalheatinputkW
BTU/h
26,6
90 754
MinimumheatinputkW
BTU/h
11,0
37 530
MaximumusefuloutputkW
BTU/h
24,3
82 906
MinimumusefuloutputkW
BTU/h
9,1
31 047
Centralheating
Maximumtemperature°C85
Minimumtemperature°C38
MaximumpressurekPa
bar
300
3
MinimumpressurekPa
bar
30
0,3
Availablehead
(in1000 l/h)
kPa
bar
27
0,27
Domestichotwater
Maximumtemperature°C55
Minimumtemperature°C35
MaximumpressurekPa
bar
1 000
10
MinimumpressurekPa
bar
30
0,3
Flowrate
minimuml/min2,5
30°risel/min11,6*
35°risel/min10,0*
40°risel/min8,7*
Injectors
NaturalG20 130
ButaneG30 77
PropaneG31 77
Gas supplypressures
Gasnorm.minmax
Natural
G20
Pa
mbar
2 000
20
1 700
17
2 500
25
Butane
G30
Pa
mbar
2 900
29
2 000
20
3 500
35
Propane
G31
Pa
mbar
3 700
37
2 500
25
4 500
45
Gaspressuresat theburner
GasminmaxIgnition
Natural
G20
Pa
mbar
180
1,8
1 170
11,7
600
6,0
Butane
G30
Pa
mbar
500
5,0
2 760
27,6
1 200
12
Propane
G31
Pa
mbar
610
6,1
3 570
35,7
1 300
13
Gasrate
Gasminmax
Natural
G20
m3/h1,16 2,82
Butane
G30
kg/h0,87 2,09
Propane
G31
kg/h0,85 2,06
*calculatedvalues subject totolerance
Netcalorificvalueat15 °Cand1013,25 mbar
G20 34,02 MJ/m3
G30 45,6MJ/kg
G31 46,4MJ/kg
1mbarapproximatelyequals10 mm H2O
INSTALLATION

Technicalinformation
13
ElectricalData
VoltageV~230
FrequencyHz50
PowerconsumptionW150
Protectiondegree IPX4D
ExternalfuseratingA3
InternalfuseratingA1,6T
Fluedesign
Fluepipediameter
Coaxialmm 60/100
Twinsplitpipesmm 80
Roofmm 80/125
Nominalheatflowrate** kW26,6
Exhaust temperature** °C145
Smokeproduction** kg/h55,1
Fluegasfigures
Nominalheatinput** kW26.6
CO2content%7,0
O2content%8,4
COcontentppm150
Exhaust temperature** °C145
Otherspecifications
Heightmm 703
Widthmm 400
Depthmm 325
Weight(dry)kg37
Watervolumeintheboler
(upto1bar)
l(kg)1,0
** Valuesrefertotestswitha1mchimneyworkingat thenominalheatinput
INSTALLATION

Technicalinformation
14
4.6Technicaldata
mod.M90E.28S
NominalheatinputkW
BTU/h
31,1
106 107
MinimumheatinputkW
BTU/h
13,0
44 353
MaximumusefuloutputkW
BTU/h
28,4
96 895
MinimumusefuloutputkW
BTU/h
10,8
36 847
Centralheating
Maximumtemperature°C85
Minimumtemperature°C38
MaximumpressurekPa
bar
300
3
MinimumpressurekPa
bar
30
0,3
Availablehead
(in1000 l/h)
kPa
bar
27
0,27
Domestichotwater
Maximumtemperature°C55
Minimumtemperature°C35
MaximumpressurekPa
bar
1 000
10
MinimumpressurekPa
bar
30
0,3
Flowrate
minimuml/min2,5
30°risel/min13,6*
35°risel/min11,6*
40°risel/min10,2*
Injectors
NaturalG20 130
ButaneG30 77
PropaneG31 77
Gas supplypressures
Gasnorm.minmax
Natural
G20
Pa
mbar
2 000
20
1 700
17
2 500
25
Butane
G30
Pa
mbar
2 900
29
2 000
20
3 500
35
Propane
G31
Pa
mbar
3 700
37
2 500
25
4 500
45
Gaspressuresat theburner
GasminmaxIgnition
Natural
G20
Pa
mbar
180
1,8
1 170
11,7
600
6,0
Butane
G30
Pa
mbar
450
4,5
2 760
27,6
1 200
12
Propane
G31
Pa
mbar
570
5,7
3 570
35,7
1 300
13
Gasrate
Gasminmax
Natural
G20
m3/h1,37 3,29
Butane
G30
kg/h1,02 2,45
Propane
G31
kg/h1,00 2,41
*calculatedvalues subject totolerance
ForthenetcalorificvaluesofG20,G30,G31 see thetechnicaldata atpage12
1mbarapproximatelyequals10 mm H2O
INSTALLATION