Biasi M90E.32S User manual

Brand: Biasi

Model: M90E.32S

Category: Fireplaces

Type: User manual

Wall hung, fan flue,roomsealed gasboiler

SERVICEMANUAL

RIVA COMPACT

Models: G.C.Appl.No.

M90E.24S47--970--17

M90E.28S47--970--18

M90E.32S47--970--21

Leave thismanualadjacent tothegas meter

Biasi U.K.Ltd

Unit31/33,PlanetaryRoad

IndustrialEstate,NeachellsLane

Willenhall,Wolverhampton WV13 3XB

Technicalhelpline:01902 304 400

Web site:www.biasi.co.uk

Tableofcontents

1Overall information2..................

1.1Overall View2.........................

1.2Hydraulicdiagram2....................

2Generalaccess andemptying

hydraulic circuits3....................

2.1Nomenclature3........................

2.2Bodypanels3.........................

2.3Controlpanel3........................

2.4Access tothesealedchamber4.........

2.5Emptyingtheprimarycircuit4...........

2.6Emptyingthed.h.w.circuit4............

3Diagrams5...........................

3.1Wiringdiagram5.......................

3.2Functionalflowdiagrams7..............

3.3Circuitvoltages8......................

4Faultfinding11........................

5Primaryheatexchanger13..............

5.1Characteristics13.......................

5.2Removal13............................

5.3Cleaning13............................

6D.h.w.heatexchanger14...............

6.1Function14.............................

6.2Removal14............................

7Pump15...............................

7.1Function15.............................

7.2Checks15.............................

7.3Removal15............................

8Three waydivertervalve16.............

8.1Function16.............................

8.2Checks16.............................

8.3Removalofthe electricactuator16........

8.4Removalofthedivertergroup

anditsinternalparts17..................

9Electronic controlp.c.b.18..............

9.1Function18.............................

9.2Selectionandadjustmentdevices18......

9.3Checkingthetemperature18.............

9.4Operation/Servicelamps19..............

9.5Dip---switchselectors20.................

9.6Settingjumpers21......................

9.7Ignitiongaspressureadjustment21.......

9.8Maxc.h.poweradjustment21............

9.9Checks21.............................

9.10 Removalofthe electronic controlp.c.b21. .

9.11 Thermalcontrolinthe” ” mode23......

9.12 Thermalcontrolinthe” ” mode23......

10 Full sequenceignitiondevice24.........

10.1Function24.............................

10.2Checks24.............................

10.3Removal24............................

10.4Ignitionandcontrolsequence25..........

11 Modulating gasvalve26................

11.1Function26.............................

11.2Nomenclatureoftheparts26.............

11.3Adjustment26..........................

11.4Checks27.............................

11.5Removaloftheon---off operatorcoils27...

11.6Removalofthegasvalve27..............

12 Primarycircuitflowswitch28...........

12.1Function28.............................

12.2Checks28.............................

12.3Removal28............................

13 Expansionvesseland

temperature-- pressuregauge29........

13.1Function29.............................

13.2Checks29.............................

13.3Removalofthe expansionvessel29.......

13.4Removalofthetemperature---pressure

gauge29...............................

14 D.h.w.flowswitch,filterandflowlimiter30

14.1Function30.............................

14.2Nomenclatureandlocationofparts30.....

14.3Checks30.............................

14.4Removaloftheflowswitchsensor30......

14.5Removaloftheflowswitchgroup

and d.h.w.circuitfilter30.................

14.6Flowlimiter31..........................

15 Temperatureprobe32..................

15.1Function32.............................

15.2Checks32.............................

15.3Removal32............................

16 By--pass valve33......................

16.1Function33.............................

16.2Removal33............................

17 Fan,venturideviceand

Airpressureswitch34..................

17.1Function34.............................

17.2Checks34.............................

17.3RemovaloftheFan35...................

17.4Inspectionandremovaloftheventuri

device35..............................

17.5RemovaloftheAirpressureswitch35.....

18 Ignitionand detectionelectrodes36.....

18.1Function36.............................

18.2Checks36.............................

18.3Removal36............................

19 Safetythermostat38...................

19.1Function38.............................

19.2Checks38.............................

19.3Removal38............................

20 Shortsparepartslist40................

1Overall information

1.1Overall View

Fan

Safety

thermostat

Main heat

exchanger

Burner

Ignition

electrodes

Gasvalve

Control

panel

Combustion

chamber

Automatic

air release

Pump

D.h.w.temp.

probe

D.h.w.

heatexchanger

Expansion

vessel

Detection

electrode

valve

D.h.w

flowswitch

Divertervalve

Airpressure

switch

Maincircuit

flowswitch

1.2Hydraulicdiagram

(

)

Domestichot water(d.h.w.)operation

C.h.

waterflow

C.h.

water return

D.h.w.

inlet

D.h.w

outle

2Generalaccess andemptying

hydraulic circuits

2.1Nomenclature

Fig.1

1Rightsidepanel

2Frontpanel

3Controlpanel lid

4Controlpanelcover

5Servicepanel

6Leftsidepanel

2.2Bodypanels

Warning:isolatetheboilerfromthemains

electricitysupplybeforeremovingany

coveringorcomponent.

Forthemostpartofthecheckandmaintenanceoper-

ationsitisnecessarytoremoveoneormorepanelsof

thecase.

Thesidepanelscanberemovedonlyaftertheremoval

ofthefrontpanel.

ToremovethefrontpanelremovescrewsA(Fig.2),lift

thepanelandremoveit.

Fig.2

ToremovethesidepanelsloosenthescrewsBandC

(Fig.3),bringthebaseofthepanelsawayfromthe

boilerandlift them,freeingthemfromthetophooks.

Fig.3--- bottomviewoftheboiler

2.3Controlpanel

Warning:isolatetheboilerfromthemains

electricitysupplybeforeremovingany

coveringorcomponent.

Togainaccess tothepartslocatedinsidethecontrol

panelproceedasfollows:

1Removethefrontpanelofthecase

2LoosenthescrewsBandC(Fig.3).

3RemovethescrewsD

4Movethelowerpartofthesidepanelsasindi-

catedinFig.4and pull thecontrolpanel.

Whencompletelypulledout,thepanelcanrotate

45°downwardstofacilitatetheserviceoper-

ationsontheinternalparts.

Generalaccess andemptyinghydraulic circuits

Fig.4

5RemovethescrewsEandremovetheservice

panel(Fig.5);

6Togainaccess tothe electronicregulationPCB

andthefull sequenceignitiondeviceremovethe

screwsFandremovethecontrolpanel lid

(Fig.5);

Fig.5

2.4Access tothesealedchamber

Fig.6

Togainaccess tothepartscontainedinthesealed

chamberitisnecessarytoremovethelidofthesealed

chamber.

Forthispurpose,removethefrontandsidepanelsof

thecase,removethescrewsGasindicatedinFig.6

andremovethelid.

2.5Emptyingtheprimarycircuit

1Closethec.h.circuitflowandreturncocksH.

(Fig.7).

Fig.7--- bottomviewoftheboiler

2Removethefrontandrightpanelsoftheboiler.

3OpenthedraintapI(Fig.8)untiltheboileriscom-

pletelyemptied.

4Closedraintapagainoncethe emptyinghas

beencompleted.

Fig.8

2.6Emptyingthed.h.w.circuit

5Closethed.c.w.inletcockJ(Fig.7);

6Openoneormorehotwatertapsuntiltheboiler

hasbeencompletelyemptied.

3Diagrams

3.1Wiringdiagram

Ignition

electrodes

Flamedetection

electrode

bn=brown

bu=blue

bk=black

wh=white

rd=red

gy=grey

Safety

thermostat

ExternalcontrolsElectricsupplyFanAirpressure

switch

Timeswitch

123

bkbk

terminalblockterminalblock

Pump

PrimarycircuitD.h.w.temperature

probeNTC

Three way

divertervalve

D.h.w.flow

switchflowswitch

C.h.temperature

probeNTC

Electronic

controlp.c.b.

Full sequence

ignitiondevice

gn=green

ye=yellow

whrd

gnye

gnye gnye

gnye

COM

vt=violet

og=orange

gnye=green/yellow

Wiringdiagramforboilerequipedwithfull sequenceignitiondevicetype:Bertelli&PartnersFM30

Modulating

gasvalve

gnye

Diagrams

bn=brown

bu=blue

bk=black

wh=white

rd=red

gy=grey

gn=green

ye=yellow

vt=violet

og=orange

gnye=green/yellow

Ignition

electrodes

Flamedetection

electrode

Safety

thermostat

ExternalcontrolsElectricsupplyFanAirpressure

switch

Timeswitch

123

bkbk

terminalblockterminalblock

Pump

Modulating

PrimarycircuitDHWtemperature

probeNTC

Three way

divertervalve

gasvalve

DHWflow

switchflowswitch

CHtemperature

probeNTC

Electronic

controlp.c.b.

Full sequence

ignitiondevice

gnye

gyrd

whrd

gnye

COM

gnye

Wiringdiagramforboilerequipedwithfull sequenceignitiondevicetype:Honeywell FPLD

Diagrams

3.2Functionalflowdiagrams

PTCJ1--- 1

General layout

Transformer

Electronic

controlp.c.b.

(lowvoltagesection)

J1--- 2

J3--- 3

J3--- 5

J3--- 4

J3--- 2J3--- 1

J2--- 4J2--- 5

Three way

divertervalve

Pump

Full sequence

ignitiondevice

Fuse1,6AT

PTCJ1--- 1

Transformer

ACTIVECIRCUIT

INACTIVECIRCUIT

L--- LINEN--- NEUTRAL

Electronic

controlp.c.b.

(lowvoltagesection)

J1--- 2

J3--- 3

J3--- 5

J3--- 4

J3--- 2J3--- 1

J2--- 4J2--- 5

Three way

divertervalve

Pump

Full sequence

ignitiondevice

Fuse1,6AT

Heatrequestond.h.w.

PTCJ1--- 1

Transformer

Electronic

controlp.c.b.

(lowvoltagesection)

J1--- 2

J3--- 3

J3--- 5

J3--- 4

J3--- 2J3--- 1

J2--- 4J2--- 5

Three way

divertervalve

Pump

Full sequence

ignitiondevice

Fuse1,6AT

Heatrequestonc.h.

Diagrams

3.3Circuitvoltages

230~

Supplynetwork

230~

Electricalvoltageswithburneron

duringc.h.ord.h.w.operation

onlyduringc.h.operation

onlyduringd.h.w.operation

230~

Pump

Full sequence

Ignitiondevice

3waydivertervalve

0 0

Electronic

controlp.c.b.

230~230~

Modulating

Gasvalve

Safety

thermostat

Fan

230~

Electronic

controlp.c.b.

Air

pressure

switch

Diagramsforboilerequipedwithfull sequenceignitiondevicetype:Bertelli&PartnersFM30

Diagrams

230~

Supplynetwork

230~

Electricalvoltageswithburneron

duringc.h.ord.h.w.operation

onlyduringc.h.operation

onlyduringd.h.w.operation

230~

Pump

Full sequence

Ignitiondevice

3waydivertervalve

0 0

Electronic

controlp.c.b.

230~230~

Modulating

Gasvalve

Safety

thermostat

Fan

230~

Electronic

controlp.c.b.

Air

pressure

switch

Diagramsforboilerequipedwithfull sequenceignitiondevicetype:Honeywell FPLD

Diagrams

4Faultfinding

Componentstocheck

Sectionofthemanual!

(noteref.inbrackets)

---

(2)

---

(3)

---

(4)

---

(5)

6 7.2 8.2 9.9 10.2 11.4 12.2 14.5 15.2 16 17.2 18.2 19.2---

(8)

---

(9)

--- ---

Applianceoperation

lampgreen(1)

Lock---outsignal lampred

Defect

Powersupplyline

Gas supplyline

Fluepipes

C.h.circuit

D.h.w.circuit

D.h.w.heatexchanger

Pump

Divertervalve

D.h.w.flowswitch

Fuse(regulationp.c.b.)

Regulationp.c.b.

Functionselectors(reg.p.c.b)

Full sequencedevice

Gasvalve(on---off operators)

Gasvalve(modulatingoperator)

Maincircuitflowswitch

D.h.w.filter

Maincircuit temp.probe

D.h.w.temp.probe

By--- pass valve

Fanandventuridevice

Airpressureswitch

Ignitionelectrode

Detectionelectrode

Safetythermostat

Injectors

Expansionvessel

Safetyvalve

Pressuregauge

OFF

Theboilerdoesnotstarteitherinc/h

ord.h.w.mode.

Fanstill.

J J J

Bypressingtheresetpush--- buttonthe

boilerturnsonandoperatescorrectly.

J J

(7)

J J J

lses

Bypressingtheresetpush--- buttonthe

boilerstartstheignitioncycle.

Theburnerdoesn’tlighton,theigni-

tionsparkscontinueandtheboiler

locksagain.

J J J J

ON--- fastpu

Bypressingtheresetpush--- buttonthe

boilerstartstheignitioncycle.

Theburnerlightson,theignition

sparkscontinueandtheboilerlocks

again.

J J J J J

Theburnerdoesn’tlighteitherinc.h.

ord.h.w.mode.

Fanturn.

J J J J

Theburnerdoesn’tlighteitherinc.h.

ord.h.w.mode.

Fandoesn’tturn.

J J J J J J J J

tpulses

Theboilerdoesn’tcontrolthed.h.w.

temperature.

Turningthed.h.w.temp.adjustment

knobhasn’teffectonthemodulationof

theflame.

Theboileroperatescorrectlyonc.h.

J J

ON--- fa

OFF

Theboilerlightsforashortwhileon

c.h.

Normaloperationond.h.w.function.

J J

Componentstocheck

Sectionofthemanual!

(noteref.inbrackets)

---------

(9)

---

(8)

19.218.217.21615.214.512.211.410.29.98.27.26---

(5)

---

(4)

---

(3)

---

(2)

Applianceoperation

lampgreen(1)

Pressuregauge

Safetyvalve

Expansionvessel

Injectors

Safetythermostat

Detectionelectrode

Ignitionelectrode

Airpressureswitch

Fanandventuridevice

By--- pass valve

D.h.w.temp.probe

Maincircuit temp.probe

D.h.w.filter

Maincircuitflowswitch

Gasvalve(modulatingoperator)

Gasvalve(on---off operators)

Full sequencedevice

Functionselectors(reg.p.c.b)

Regulationp.c.b.

Fuse(regulationp.c.b.)

D.h.w.flowswitch

Divertervalve

Pump

D.h.w.heatexchanger

D.h.w.circuit

C.h.circuit

Fluepipes

Gas supplyline

Powersupplyline

Defect

Lock---outsignal lampred

Theboilerdoesnotsupplyd.h.w.(cold

waterfromthetap).

Regularoperationinc/hmode even

duringadrawingoff d.h.w.

J J J

Onc/hmodethetemperatureofthe

maincircuitreaches75°Candthec/h

systemdoesnotheat.

Theboileroperatescorrectlyond.h.w.

mode.

J J

IncorrectmodulationJ J J

NoisybolierJ J

alpulse

Theboileroperatescorrectlybut the

gaspressuretotheburner remainsat

minimum.

J J

--- nor

Poord.h.w.temperatureJ J J J J

(10)

Lowd.h.w.flowrateJ J J

--- ---

Waterleaksfromthesafetyvalvedur-

ingoperationonc/h

J J J J

--- ---

Waterleaksfromthesafetyvalvewhen

theboilerisoff.

J J J

Note

1Fordetails see section9.4ofthismanual.

Furtherusefulinformationcanbeobtainedbyswitching

the electronic controlp.c.b.intheserviceoperationmode

(see section9.4ofthismanual).

2Checkfor230V~betweenline(L)andneutral(N)

Verifytheintegrityofsupplycable,plugandexternalfuses.

Checkthepolarityoflineandneutralconnection

3Verifythesoundness ofthegas supplypipe,thepositionof

stopvalves.

Checkthegaspressureat theinlet testpointofthegasvalve

(see sect.11.3)withtheboileratrestand duringoperationand

compareitwiththevaluesgivenontheinstallationbooklet.

4Checkforsoundness andabsenceofobstructions.Verifythat

theflueterminaliscorrectlyinstalled(see clearances)anden-

surethatexhaustgasisnotsucked backbytheboiler.

5Checkforsoundness ofthecircuitandverifyitscorrectfilling

(see alsoinstallationmanual).

6Ajammed by---pass couldcausetheover---heatingofthemain

circuitandtheinterventionofthesafetythermostat.

7Checktheminimumgaspressureat theoutlet testpointofthe

gasvalve(see sect.11.3)andcompareitwiththevaluegiven

ontheinstallationbooklet.

8Verifythecleanness ofinjectors.

9Checkthepressurizationofthe expansionvessel.Refertothe

installationmanualforpropervalues.

10 d.h.w.pressuretoo highorflowratetoo high.Ifnecessaryin-

sertaflowratelimiter(14.6).

5Primaryheatexchanger

5.1Characteristics

TheprimaryheatexchangerAinFig.9hasthefunction

oftransferringheatproducedfromcombustionofthe

gastothewatercirculatinginit.

Fig.9

Thehydraulic circuitiscomposedof8ellipticalpipes

connectedinparallel(Fig.10).

Fig.10

5.2Removal

Warning:isolatetheboilerfromthemains

electricitysupplybeforeremovingany

coveringorcomponent.

1Emptytheprimarycircuitoftheboiler.

2Removethecasepanelsandthesealedchamber

lid(see section2).

3RemovethecombustionchamberlidBbyun-

screwingthescrewsC(Fig.11).

3bFormodelM90E.28SandM90E.32Sonly,re-

movethescrewDandtheplateE.

4RemovetheclipsFandthesafetythermostatG.

Itisnotnecessarytodisconnectitfromthewiring.

Fig.11

5UnscrewtheconnectionH(Fig.12),lift thepipe

Iandrotateitright thenmoveitdownwardsfree-

ingitfromtheheatexchangerconnection.

6Removethemotorofthethree waydivertervalve

(see section8.3).

7CompletelyunscrewtheconnectionJandrotate

thepipeK.downwardsfreeingitfromtheheatex-

changerconnection.

8Removetheheatexchangerbyslidingitfor-

wards.

9Reassembletheboilercarryingout theremoval

operationsinreverseorder.Fit theclipsFwith

thearrowpointingupwardsasillustratedin

Fig.11.

Fig.12

5.3Cleaning

Iftherearedepositsofsootordirtbetweentheblades

oftheheatexchanger,cleanwithabrushornon---me-

tallicbristlebrush.

Inanycase,avoidanyactionsthatcandamagethepro-

tectivevarnishwithwhichthe exchangerhasbeencov-

ered.

Warning:Aftercleaningor replacementas

detailedaboverefertosectionCombustion

analysis checkinthechapterMaintenanceof

theinstallationinstructionsmanual.

6D.h.w.heatexchanger

6.1Function

Thed.h.wheatexchangerAinFig.13 allowstheinstan-

taneoustransferofheatfromtheprimaryhydraulic cir-

cuit tothewaterdestinedford.h.wuse.

Fig.13

Theschematicstructureis showninFig.14.

Primaryhydraulic circuit

Fig.14

6.2Removal

Warning:isolatetheboilerfromthemains

electricitysupplybeforeremovingany

coveringorcomponent.

1Removethefrontandrighthandsidepanelsof

thecase.

2Emptytheprimarycircuitandthed.h.wcircuitof

theboiler.

3Removethemotorofthethree waydivertervalve

(see section8.3).

4CompletelyunscrewthetwoAllenkeyscrewsB

(Fig.15)which holdthe exchangertothebrass

groups.

Fig.15

5Movethe exchangertowardstherearoftheboiler

andextractit.

Reassemblethed.h.w.heatexchangercarryingout the

removaloperationsinthereverseorder.

Attention.Whenreassemblingthe exchangerbe

suretoput theoff centerlocation/securingpinindi-

catedinFig.16 towardstheleftsideoftheboiler.

Fig.16

7Pump

7.1Function

ThepumpAinFig.17 hasthefunctionofmakingthe

waterinthemaincircuitcirculatethroughthemain heat

exchangerandthereforethroughthec.h.system(dur-

ingthec.h.function)orthroughthesecondaryheatex-

changer(duringthed.h.w.function).

Fig.17

7.2Checks

Warning:isolatetheboilerfromthemains

electricitysupplybeforeremovingany

coveringorcomponent.

nCheckthat thepumpisnotseizedandthat the

movementoftherotorisnotsubject tomechanicalim-

pediments.

Withtheboileroff,removethefrontpanel.Removethe

air releaseplugofthepumpandturntherotorwitha

screwdriver.

nCheckthe electricalcontinuity.

Withtheboileroff,removethefrontpaneland discon-

nect theconnectorB(Fig.18).

Measurethe electricalresistancebetweenthepump

supplyconnections.

Electricalresistanceofthewindings(atambient tem-

perature)mustbeabout230 W

nChecktheabsenceofstartingdefects.

Withtheboileroff removethefrontcasepanel.

Removetheair releaseplugfromthepump.Start the

boilerandwithascrewdriver,turntherotorinthedirec-

tionofthearrow.Ifthereisadefectinstarting,therotor

will begintoturn normallyonlystartingitmanually.

nCheckthat theimpellerisintegralwiththerotor.

Withtheboileroff removethefrontandrighthandside

casepanels,lowerthecontrolpanelandemptythepri-

marycircuit.

Removethepumphead byundoingthescrewswhich

holdit tothepump bodyandcheckthat theimpelleris

firmlyjoinedtotherotor.

7.3Removal

Warning:isolatetheboilerfromthemains

electricitysupplybeforeremovingany

coveringorcomponent.

1Removethefrontandrighthandsidecasepanels

2Emptytheprimarycircuitoftheboiler.

3Extractandlowerthecontrolpanel.

4Disconnect theconnectorB(Fig.18).

5UnscrewtheconnectionCandmovethepipeup-

wardsfreeingitfromtheoutletportofthepump.

6RemovetheforkDandthecapillarypipe

7RemovethelockingplateEright(Fig.18).

Fig.18

8LoosentheconnectionF,removetheforkGand

thepipeH.

9UnscrewthetwoscrewsIthatholdthepumpon

theframe(Fig.19)andremovethepumptowards

thefrontoftheboiler.

Fig.19

Reassemblethepumpcarryingout theremovaloper-

ationsinthereverseorder.Whenreassemblingthe

pump,checkthecorrectlocationoftheO---ring gasket

intheinletportofthepumpthatsealstheconnection

betweenthepumpandthebrass group.

8Three waydivertervalve

8.1Function

ThedivertervalveA(Fig.20)hasthefunctionofmodify-

ingthehydraulic circuitoftheboilerbymeansofan

electric commandgivenbythe electronic controlp.c.b.

inordertosendthewaterthatexitstheprimaryheatex-

changertowardsthec.h.systemortowardsthed.h.w.

heatexchanger.

Fig.20

8.2Checks

nCheckthe electricalcontinuity

Fig.21 indicatestherelationship betweenthe electric

commandcomingfromthe electronic controlp.c.b.

andthepositionoftheactuatorB(brass spindle)when

theboileroperatesind.h.w.mode.

Fig.22 indicatestherelationship betweenthe electric

commandcomingfromthe electronic controlp.c.b.

andthepositionoftheactuatorB(brass spindle)when

theboileroperatesinc.h.mode.

Inbothfigurestherelationship betweenthepositionof

theactuatorandtheresistanceofthemotorwindings

(themotormustbedisconnectedfromthewiring)is

alsogiven.

bn=brown

bu=blue

bk=black

230 V

SpindleB

notvisible

Opencircuit

9,4Kohm

Fig.21 --- D.h.w.mode

bn=brown

bu=blue

bk=black

230 V

SpindleB

visible

Opencircuit

9,4Kohm

Fig.22 --- C.h.mode

8.3Removalofthe electricactuator

Warning:isolatetheboilerfromthemains

electricitysupplybeforeremovingany

coveringorcomponent.

1Removethefrontcasepanel.

2Disconnect theconnectorsC(Fig.23).

3RemovethefixingspringDandremovethe

actuatorE.

Reassembletheactuatorcarryingout there-

movaloperationsinthereverseorder.

Whenreassemblingtheactuator,refertoFig.21

ortothewiringdiagraminsection3.1forthecor-

rectwiringconnection.

Three waydivertervalve

Fig.23

8.4Removalofthedivertergroupandits

internalparts

1Removethefrontand bothsidecasepanels.

2Emptytheprimarycircuitandthed.h.wcircuitof

theboiler.

3Removethe electricactuator(see section8.3).

4RemovethefixingspringF(Fig.24)andremove

theprimarycircuitflowswitchG.

5Disconnect thec.h.temperatureprobeH.

6UnscrewtheconnectorI,thec.h.flowconnector

andthed.h.w.outletconnector.

Fig.24

7Removethed.h.w.heatexchanger(see section

6.2).

8RemovetheforkJandmoveawaythepipeK

(Fig.25).

9UnscrewthescrewLandremovethediverter

group.

Fig.25 Rearviewoftheboiler

10 Refertothe explodedviewinFig.26 toremove

theinternalpartsofthethree waydivertervalve.

Fig.26

11 Reassemblethedivertergroupcarryingout the

removaloperationsinthereverseorder.

9Electronic controlp.c.b.

9.1Function

Fromotherboilerdevices....

C.h.temperatureprobeNTC

D.h.w.temperatureprobeNTC

D.h.w.flowswitch

Primarycircuitflowswitch

Roomthermostat(if fitted)

Timeswitch

Flamepresencesignal*

*fromthefull sequenceignitiondevice

OntheElectronic controlp.c.b.......

Functioncontrol*

C.h.temperatureadjustment*

D.h.w.temperatureadjustment*

Functiondip---switches

Max.c.h.gaspressureadjustment

Ignitiongaspressureadjustment

Boiler resetbutton*

*controlpanelfascia

InletInformation

Pump

Three waydivertervalve

Full sequenceignitiondevice

Modulationoperator

Applianceoperationlight*

Operation/servicelamps

Lock---outsignal lamp*

*controlpanelfascia

Outletcommand

Fig.27

ThefundamentalfunctionoftheElectronic control

p.c.b.isthatofcontrollingtheboilerinrelationtothe ex-

ternalneeds(i.e.heatingthedwellingorheatingthe

waterford.h.w.use)andoperatinginordertokeepthe

temperatureofthehydraulic circuitsconstant.

Thisisobviouslypossiblewithintheusefulpowerand

maximumworkingtemperaturelimitsforeseen.

Generally,theElectronic controlp.c.b.receivesinletin-

formationcomingfromtheboiler(thesensors)orfrom

theoutside(knobs,roomthermostat,etc.),processes

itandconsequentlyactswithoutletcommandson

othercomponentsoftheboiler(Fig.27).

9.2Selectionandadjustmentdevices

OntheElectronic controlp.c.b.severalselection,ad-

justmentand protectiondevicesarelocated.(Fig.28).

Someofthesedevicesaredirectlyaccessiblebythe

user(functioncontrol,temperatureadjustmentpoten-

tiometersetc.)othersareaccessiblebyremovingthe

servicepanelorthecontrolpanel lid.

34567

Fig.28

1J3connector

2J2connector

3Lock---outsignal lamp

4Boiler resetbutton

5Functioncontrol/C.h.temperatureadjustment

6D.h.w.temperatureadjustment

7Servicelamps(servicemode)

8Applianceoperationlamp(normalusemode)

9Dip---switchselectors

10 Settingjumpers

11 Ignitiongaspressureadjustment(ACC.)

12 Maximumc.h.gaspressureadjustment(RISC.)

13 J1connector

14 Fuse1,6AT

9.3Checkingthetemperature

TheElectronic controlp.c.b.makesitpossibletosepar-

atelyadjust thec.h.waterflowtemperatureand d.h.w.

outlet temperature.

Thetemperatureofthewaterisconvertedintoanelec-

tricsignalbymeansoftemperatureprobes.

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Biasi M90E.32S User manual

Brand: Biasi

Model: M90E.32S

Category: Fireplaces

Type: User manual

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Biasi M90E.32S User manual

Biasi M90E.32S User manual

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