Biasi 200DI Installation And Maintenance Instructions Manual

Brand: Biasi

Model: 200DI

Type: Installation And Maintenance Instructions Manual

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UnventedHotWaterCylinders

InstallationandMaintenanceInstructions

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IMPORTANTNOTETOTHEINSTALLER

Read these installation and maintenance instructions before commencing. Unvented cylinders are a controlled service as

definedinthelatesteditionofthebuildingregulationsandshouldonlybefittedbyacompetentperson.

Therelevantregulationsare:EnglandandWales–BuildingRegulationG3;Scotland–TechnicalStandardP3;NorthIreland–BuildingRegulationP5.

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Afterinstallationtheinstallermustlefttheinstructionsmanualwiththehouseholder.

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PRE‐INSTALLATIONSTORAGE

Storetheunitstandinguprightinitsoriginalpackaginginanareafreefromexcessivedamp.

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FEATURESOFTHEUNVENTEDCYLINDER:

‐MadefromDuplexStainlessSteelforexcellentcorrosionresistance

‐Strongrust‐proofedsteelcase

‐Highlyinsulatedwithenvironmentallyfriendlyfoam

‐Availableinrangeofsizestosuit‐125L,150L,170L,200L,250Land300litres

‐AllmodelsincludingSolarmodelsareavailableinDirectorIndirectversions

‐Supplied

completewithallthenecessarysafetyandcontroldevicesneededtoconnectcoldwatermains

‐Allsafetyandcontroldevicesarepre‐adjusted

‐ High qualitycontrolsselectedthatcombinehighflowrate performancewithminimumpressuredropwhichgives

fantasticperformanceinallareas,withgreatimprovementsinareas

withpoorwaterpressure

‐KIWAapprovedforcompliancewiththeWaterSupply(WaterFittings)Regulations1999andBuildingRegulationsG3

&L.

COMESCOMPLETEWITHALLTHEFITTINGSYOUNEEDTOCOMPLETE THEINSTALLATION:

ACCESSORIES DIRECT INDIRECT SOLARDIRECT SOLARINDIRECT

ExpansionVessel

3 3 3 3

Wallmountingkitforexpansionvessel

3 3 3 3

Expansionvesselhose

3 3 3 3

Tundish

3 3 3 3

10wayelectricalbox

2 3 3 3

Highﬂowrateinletcontrolset

3 3 3 3

Twoportvalve

2 3 3 3

Immersionheater

3 3 3 3

Temp&Pressurereliefvalve

3 3 3 3

Dualthermostat

2 3 2 3

Highlimitstat

2 2 3 3

Installation&MaintenanceInstructions

3 3 3 3

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Storagecapacity

125L 150L 170L 200L 250L 300L

Operatingpressure 5,5bar

MaxWatersupplypressure 10bar

MaxPrimaryworkingpressure 3bar

Pressurereducingvalve 3bar

Immersionheater 3kW/240V,1¾’’,16’’LONG

Expansionvesselchargepressure 3bar

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SITINGTHEUNIT

Thisunitcansupplyoutletsaboveitoratsomedistancefromitbutanyoutletsabovetheunitwillreducetheavailableoutlet

pressureby0.1barforevery1mof heightdifference.Themaximumlengthofthe“deadleg”shouldbeasstatedintheWater

Supply(WaterFittings)

Regulations1999G18.7,inparticulartotheareaofmostfrequentuse.

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Particular attention is needed if sitting in a garage or outbuilding as the unit should be protected from frost. All exposed

pipework must be insulated. The unit must be installed UPRIGHT on a flat base capable of supporting

 its weight when full

(pleaseseethetechnicalspeciﬁcationsectionforweights).Theminimumrecommendedcupboardsizeis650mmsquare.

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Sufficient access to allow maintenance of the valves should  be considered. In addition the immersion heaters are 400mm in

length and this distance should be considered to allow withdrawal

 for servicing if required. The discharge pipework from the

safetyvalvesshouldfallcontinuouslyandterminatesafely.

SCHEMATICDIAGRAM

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WATERSUPPLY

The performance of any unvented system is only as good as the mains water supply available. To this effect the maximum

possible water demand should be assessed, with the knowledge that the mains supplies both hot and cold services

simultaneously.

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Thewaterheateritselfoperatesatapressureof3

bar,controlledbytheinletcontrolset,andiscapableofdeliveringover50

litresperminute.Thehighqualityinletcontrolsethasbeendesignedtomakethemostoftheflowratesavailable.

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Thewatersupply shouldbecheckedtoensure itcanmeet theserequirements.Ifnecessary,

consultthelocalwaterauthority

regardingthelikelypressureandflowrateavailability.

Consideration should be given to upgrading existing ½” (15mm) cold mains pipework to a larger size if the recommended

minimumpressure/flowrateisnotbeingachieved.

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Note:Ahighstatic(noflow)mainspressureisnoguarantee

ofgoodflowavailability.Inadomesticinstallation1.5barand25

l/min.shouldberegardedastheminimum.Themaximummainspressurethattheinletcontrolsetcancopewithis10bar.

Legend:

1.BronzePump

2.NonReturnValve

3.TwoPortValve

4.Temperature&PressureReliefValve

5.ExpansionReliefValve

6.ExpansionVesselwithwallbracket

7.PressureReducingValve

8.IsolatingValve

9.DrainValve(notsupplied)

Note:

Thepressurereducingvalve,non‐return

valveandexpansionrelief

valveare

combinedtogetherintheinletcontrolet.

On125‐170Lsizesthereisnodedicated

secondaryreturnbossandthesecondary

returncircuitshouldbetee’dintothe

coolfeedpipejustabovethedrainelbow.

SECONDARY

FLOW

SECONDARY RETURN CIRCUIT

(200, 250 & 300 LITER SIZES)

PRIMARY

FLOW

DUAL

STAT

PRIMARY

RETURN

1 2

FLEXIBLE HOSE

2 7

COLD

MAIN

COLD FEED

BALANCED COLD

CONNECTION

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GENERALINSTALLATION

CONNECTINGTOTHECYLINDER

Allofthepipeworkconnectionsonthecylinderare22mmcompressionandsuppliedcompletewithglandnutsandolives,inthe

AccessoryKitbox.Onlyconnect22mmTableXcoppertubetotheseconnections.Cutthetubewithapipecutterandensureno

sharp edges or burrs protrude. Slide both

 gland nut and olive onto the tube and push tube fully home into the connection,

ensuring the tube end fully bottoms on the connection recess. Smear the outer wall of the olive with plumbing paste and

tightenglandnutcorrectly.

Uponﬁlling/commissioning,ensureallconnectionsarecompletelywatertight.

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Note:Nocontrolorisolationvalveshouldbeﬁttedbetweentheexpansionreliefvalveandthestoragecylinder.Thereliefvalve

connectionsshouldnotbeusedforanyotherpurpose.

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COLDMAINSPIPEWORK

Runthecoldmainthroughthebuildingtotheplacewhereistobeinstalled.Takecarenottorunthecoldpipenearhotwater

or heating pipeworksothattheheatpick‐upisminimized.Identifythecoldwatersupplypipeandfitanisolatingvalve(not

supplied).

A22mmBS1010stopcockcan typicallybeused buta22mmquarterturn full borevalvewouldbe betterasitdoes

not restrict the flow as much. Do not use “screwdriver slot” or similar valves. Make the connection to the cold feed of the

cylinder and incorporate a drain

valve. Position the inlet control just ABOVE the Temperature & Pressure Relief Valve (TPRV)

mountedonthesideofthecylinder.This ensures that the cylinder doesnothave to bedraineddown in ordertoservicethe

inlet control set. Ensure that the arrow points in the direction of the

 water flow. Select a suitable position for the expansion

vessel.Mountittothewallusingthebracketprovided.Usetheflexiblehoseprovidedtoconnecttotheinletcontrolgroup.

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BALANCEDCOLDCONNECTION

Iftherearetobeshowers,bidetsormonobloctapsintheinstallationthenabalancedcoldsupplyisnecessary.Thereisa22mm

balancedconnectionontheinletcontrolset.

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HOTWATERPIPEWORK

Runtheﬁrstpartofthehotwaterdistributionpipeworkin22mm.Thiscanbereducedto15mmand10mmasappropriatefor

thetypeoftapetc.Youraimshouldbetoreducethevolumeofthehotdraw‐offpipeworktoapracticalminimumsothatthe

time

takenforthehotwaterisasquickaspossible.Donotusemonoblocmixertaporshowersifthebalancedcoldconnection

is not provided. Outlets of this type can back pressurize the unit and result in discharge. Select a suitable position for the

expansion vessel. Mount it to the

 wall using the bracket provided and connect to the inlet control set with the flexible hose

provided.Ensurethatthetopofthevesselisaccessibleforservicing.

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PRIMARYCOILCONNECTIONS

Connect the primary connections (Indirect only) using the compression connections provided.  The primary circuit must be

positivelypumped.Gravitycirculationisnotsuitable.Eitherprimaryconnectionmaybeusedastheprimaryflow.Reheattimes

areidenticaleitherway.Theprimarycircuitcanbeopenventedorsealed,withupto

amaximumpressureof3.5bar.Ifyouseal

theprimarycircuitanadditionalexpansionvesselandsafetyvalveisrequired.TheboilermaybeGas,ElectricorOilbutmustbe

undereffectivethermostaticcontrol.UncontrolledheatsourcessuchassomeAGA’s,backboilers,solidfuelstoves,etc.are

NOT

SUITABLE. Please contact our Technical department for guidance. Connect the two port zone valve (indirect only) into the

primaryflowpipework.Thedirectionofflowarrowshouldbetowardstheprimaryflowconnection.Ontwincoilsolarcylinders

wehaveprovidedanextrathermostatbossshouldyouwishtouse

it.Againatwoportzonevalveshouldbeﬁtted(supplied).



SECONDARYCIRCULATION

Canbeusedwithsecondarycirculation.AnappropriateWRASapprovedbronzecirculatorshouldbeusedinconjunctionwitha

non‐return valve to prevent backflow. On large secondary circulation systems it may be necessary to incorporate an extra

expansionvesselinto thecircuittoaccommodatetheincreasedsystemwatervolume.Secondary

circulationshouldbeavoided

onDirectelectricallyheatedunitsbeingusedonoff‐peakelectricitytariffs.

Asecondaryreturnbossisﬁttedasstandardon200L,250Land300Lunits.Onsmallersizes,teeintothecoldfeedpipeabove

thedrain.



IMMERSIONHEATERS

Only immersion heaters with a thermal cutout may be used. To help ensure this, the immersion heaters have a special 1¾”

thread.Theyare ratedat3 kWat240Vandare ofalow noiseIncoloyconstruction.Theyhave bothathermostatandahigh

limit cutout. Please order

 the correct replacement from BIASI; fitting non‐approved immersions may affect your guarantee.

Whenfitting,ensure the‘O’ringispositionedcorrectlyontheheadoftheimmersionheaterandlubricatebeforefitting.Fitit

byhanduntilalmost homethentightengently asthe‘O’ringswillseal easily.

Theelectricalsupplytoeachimmersion heater

must be fused at 13A via a double pole isolating switch to BS 3456. The cable must be 2.5mm

 heat resistant (85°C HOFR)

sheathedflexcomplyingtoBS6141:1981Table8.Donotoperatetheimmersionheater/suntiltheunitisfullofwater.Donot

operatetheimmersionheater/sifanysterilisationliquidisinthecylinderasthiswillcauseprematurefailure.Fittheimmersion

thermostat(indirect

unitsonly)intothethermostatpocket.Completethewiring–usetheappropriatewiringdiagrams.

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

DISCHARGEARRANGEMENT

Note:Itisnotacceptabletodischargestraightintoasoilpipe



Note:Thedischargewillconsistofscaldingwaterandsteam.Asphalt,roofingfeltandnon‐metallicrainwatergoodsmaybedamagedbysuch

discharges.

Theinletcontrolgroup should bepositionedsothatthedischarge from bothsafetyvalvescan be combined viaa15mmend

feedTee,asinthediagramabove.

Connect the tundish and route the discharge pipe which must be routed in accordance with Building regulation‐Part G3 of

schedule1.



Whenoperatingnormallywaterwillnotbedischarged.Waterdischargefromthetwosafetyvalveswillonlyoccurunderfault

conditions.

Thetundishshouldbe vertical, locatedinthesamespace astheunvented hotwaterstoragesystemand beﬁttedas closeas

possible,within500mmofthesafety

devicee.g.thetemperaturereliefvalve.

Thepositionofthetundishmustbethatwheninstalleditisvisibletotheoccupantsofthepremises.

When positioning the tundish, the drain valves and motorised valve ensure that these items are positioned away from any

electricaldevices.



The discharge pipe (D2)

 coming from the tundish should terminate in a safe place where there is no risk to persons in the

vicinityofthedischarge,beofmetaland:

A) Be at least one pipe size larger than the nominal outlet size of the safety device unless its total equivalent hydraulic

resistance

exceeds that of a straight pipe 9m long, i.e. discharge pipes between 9m and 18m equivalent resistance

length should be at least two sizes larger than the nominal outlet size of the safety device, between 18 and 27m at

least3sizeslarger,andsoon.Bendsmustbetakeninto

accountincalculatingtheflowresistance.Refertodiagram1,

Table 1 and the worked example. An alternative approach for sizing discharge pipes would be to follow BS6700

Speciﬁcation for design, installation, testing and maintenance of services supplying water for domestic use within

buildingsandtheircurtilages.

B) Have

averticalsectionofpipeatleast300mmlong,belowthetundishbeforeanyelbowsorbendsinthepipework.

C) Beinstalledwithacontinuousfall.

D) Itis preferable for the discharge to be visible at both the tundish and the final point of discharge. Where this is not



possibleorpracticallydifficult,thereshouldbeclearvisibilityatoneorotheroftheselocations.



Examplesofacceptabledischargearrangementsare:

1.Ideallybelowtheﬁxedgratingandabovethewatersealinatrappedgulley.

2. Downward discharges at a low level; i.e. up to 100mm above external surfaces such as car parks, hard standings, grassed areas etc. are

acceptableprovidingthatwherechildren playorotherwise comeintocontact withdischarges,awirecageorsimilarguardispositionedto

preventcontactwhilstmaintainingvisibility.

3.Dischargesatahighlevel;e.g.intometalhopperandmetaldownpipewiththeendofthedischargepipeclearlyvisible(tundishvisibleor

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not) or onto a roof capable of withstanding high temperature discharges of water and 3m from any plastic guttering systems that would

collectsuchdischarges(tundishavailable).

4. Where a single pipe serves a number of discharges, such as in blocks of flats, the number served should be limited to not more than 6

systemssothatanyinstallationcanbetracedreasonablyeasily.Thesinglecommondischargepipeshouldbeatleastonepipesizelargerthan

the largest individual discharge pipe to be connected. If unvented hot water storage systems are installed where discharges from safety

devicesmaynot

beapparent,i.e.indwellingsoccupiedbyblind,infirmordisabledpeople,considerationshouldbegiventotheinstallationof

anelectronicallyoperateddevicetowarnwhendischargetakesplace.



WORKEDEXAMPLE

The example below is for G1/2 temperature relief valve with a discharge pipe (D2) having 4 No. elbows and length of 7m from the tundish to the point of

discharge.

FromTable1:

Maximumresistanceallowedforastraightlengthof22mmcopperdischargepipe(D2)fromaG1/2

temperaturereliefvalveis:9.0m.Subtracttheresistancefor

4 No. 22mm elbows at 0.8m each = 3.2m. Therefore the maximum permitted length equates to: 5.8m. 5.8m is less than the actual length of7m,therefore

calculatethenextlargestsize.

Maximumresistanceallowedforastraightlengthof28mm

pipe(D2)froma G1/2temperaturereliefvalveequatesto:14m.Astheactuallengthis7m,a28mm

(D2)copperpipewillbesatisfactory.



Table1‐Sizingofcopperdischargepipe(D2)foratemperaturereliefvalvewithaG1/2outletsize(assupplied).

Sizeofdischarge

pipework

Maximumlengthof



straightpipe(nobendsorelbows)

Deductthefigurebelowfromthemaximumlength

foreachbendorelbowinthedischargepipe

22mm Upto9m 0.8m

28mm Upto18m 1m

35mm Upto27m 1.4m

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TYPICALWIRINGDIAGRAMS

These diagrams relate only to the components listed. Others may vary in their wiring requirements, particularly thermostats.

Alwaysrefertomanufacturers’instructionswhichmayoverridethedetailinordertofunctioncorrectly.

WIRINGDIAGRAM2xTWOPORTZONEVALVES(S‐

PLAN)VARIANTDUALTHERMOSTATWIRING

WIRINGDIAGRAMTHREEPORTMIDPOSITION

VALVE(Y‐PLAN)+TWOPORTVALVEVARIANT

DUALTHERMOSTATWIRING



COMMISSIONING

FILLING

Firstyoumustensurethatthepressureintheexpansionvesselisthesameasthesettingofthepressurereducingvalvei.e.3

bar(45PSI).ThevalveisoftheSchradercartyretype.Checkalltheconnectionsforwatertightnessincludinganyfactorymade

connections such as the immersion

 heater and  the temperature and pressure relief valve. Prior to ﬁlling, open the hot tap

furthestawayfromtheBIASISILVERtoexpelair.Openthecoldmainisolationvalveandallowtheunittofill.

Oncethecylinderas beenfullycommissionedshould beheatedto itsnormaloperating

temperature.Draw offsecondaryhot

watertoeachoutletandallowhotwatertoflowfromeachoutletforatleast30secondstoremoveanyfluxresiduefromthe

pipeworkwithinthesecondaryhotwater system. Then fully drainthecylinderandre‐filledtoensurethatall

fluxresiduesis

removedfromthesystem.



DIRECTUNITS

Afterbothﬁllingwithwaterandpurgingofsterilisationliquid,switchonthepowertotheimmersionheatersandallowtheunit

tostarttoheat.Theimmersionheaterissuppliedpresetat55°C.Turningfullyto+setstoapprox65°C.



INDIRECTUNITS

Filltheprimarycircuitaccordingtotheboilermanufacturers’commissioninginstructions.Ensuretheleveronthetwoportvalve

issetto theﬁllingposition. Whenfull,move theleverback.Switch theprogrammertoDomesticHotWater(DHW)andallow

theunittostarttoheat.Adjustthedial

ofthedualthermostattobetween30°Cand70°Casrequired.



STORAGETEMPERATURE

60‐65°C is the recommended storage temperature for both direct and indirect cylinders. In hard water areas consideration

shouldbegiventoreducingthisto50‐55°C.InmanyhealthcareapplicationstheguidanceonLegionellacontrolandsafewater

deliverytemperatureswillrequirestoringthewaterat60‐65°C,distributingat

50‐55°Candusingthermostaticmixingvalvesto

controlthefinaltemperature.FordetailsconsulttheNHSEstatesGuidanceonsafehotwatertemperatures.



 

GBrBlO 1 2 4 GBrBl O

HP22

Zone Valve (Htg)

Room Stat

RMT 230

HP22

Zone Valve (Dhw)

1 2

5 6

8 9 10

LNE

Htg

Dhw

LNE

IDT

Dual Stat

Control

Unit

High Limit

Stat

Power

Supply

12 212

Junction Box

1 2 3 2 3

FP75 or CP15 Programmer

Basic Boiler

Pump

C21 WGOBI

Cylinder Stat

ITD Dual Stat HP22

Mid Position Valve

1 2 3 4 5 6 7 8 9 10

LNE

Htg

Dhw

LNE

IDT Dual Stat

Power

Supply

Junction Box

1 2 3 2 3

FP75 or CP15 Programmer

Basic Boiler

Pump

124

Room Stat

RMT 230

G/Y

NOT

USED

Dhw

off

BR BL G O

HP22

High Limit Stat

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SAFETYVALVECHECKS

Any sign of water coming from either the expansion relief valve or the temperature/pressure relief valve during heat‐up

indicatesaproblem. Nextholdbothofthesesafetyvalves fullyopen,allowing asmuchwateraspossibletoflow through the

tundish.Checkthatyourdischargepipeworkisfreefromdebris

and iscarryingthewaterawaytowasteefficiently.Releasethe

valvesandcheckthattheyreseatproperly.

SERVICING

GENERAL

ServicingshouldonlybecarriedoutbycompetentinstallersandanysparepartsusedmustbepurchasedfromBIASICylinders.

NEVERbypassanysafetydevicesoroperatetheunitwithoutthembeingfullyoperational.



DRAINING

Switchtheelectricalpoweroff(importanttoavoiddamagetoelement).Isolateboilerfromtheunit.Turnoffthecoldwater

supplyvalve.Openhotwatertap.Openthedrainvalve.Theunitwilldrain.

WARNING:WATERDRAINEDOFFMAYBEVERYHOT!



ANNUALMAINTENANCE

Thewaterheaters requireannualservicinginorder toensuresafeworkingand optimum performance.It is essential that the

following checks are performed by a competent installer on an annual basis. This is commonly done at the same time as the

annualboilerservice.

1)Twistthecapofthe

expansionreliefvalveontheinletcontrolsetandallowwatertoflowfor5seconds.Releaseand

make sure it resets correctly. Repeat with the pressure / temperature relief valve. In both cases check that the

dischargepipeworkiscarryingthewaterawayadequately.Ifnot,checkforblockages

etc.andclear.

WARNING:THEWATERDISCHARGEDMAYBEVERYHOT!



2) Check that any immersion heaters ﬁtted are working correctly and that they are controlling the water at a

temperaturebetween55°Cand65°C.

3)Checkthepressureintheexpansionvesselischargedto3bar.Turnoffthewatersupplytotheunitandopenahot

tap

ﬁrst.TheairvalveonexpansionvesselisaSchrader(cartyre)type.AirorCO2maybeusedtochargetheexpansion

vessel.

4)Unscrewtheheadontheinletcontrolsetandcleanthemeshfilterwithin.

5)TheBenchmarkLogBooksuppliedwiththisunitshouldbe

updatedateachservice.



YOURGUARANTEEMAYBEVOIDWITHOUTPROOFOFANNUALSERVICING



SPAREPARTS

Afullrangeofsparepartsisavailable.

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FAULT POSSIBLECAUSE SOLUTION

Waterescapingfromthecaseunit

Compressionfittingonhot–drawoffnotsealing Check/remakejointsealingpaste

Coldwaterathottaps

Direct–immersionheaternotswitchedonorcutout

hastriggered

Check/reset

Indirect–boilernotworking

Checkboiler–consultboilermanufactures’

instructions

Indirect–motorizedvalvefault Checkplumbing/wiringmotorizedvalve

Indirect–cutoutindualstathasoperated Resetandinvestigatecause

Waterdischargesfromexpansion

reliefvalve

Ifcontinual–pressurereducingvalve(partofinlet

controlset)maynotbeoperatingcorrectly

Checkoutletpressurefrominletcontrolsetis3bar

Ifcontinual–expansionreliefvalveseatmaybe

damaged

Removecartridge–checkseatandrenewifnecessary

Ifintermittent–expansionvesselchargemayhave

reduced/bladderperished

Checkpressureinexpansionvessel.Rechargeto3bar

ifnecessary.Ifbladderperishedreplacevessel

Unititbeingbackpressurized

Withcylindercoldcheckpressureincylinder.Ifthisis

thesameastheincomingmainspressurethenyouare

gettingbackfeed.Installabalancedcoldsupply

Waterdischargesfromtemperature

&pressurereliefvalve

Unithasoverheated–thermalcontrolshavefailed

Switchedoffpowertoboilerandimmersionheaters.

Leavewatersupplyon.Waituntildischargesstops.

Isolatewatersupplyandreplaceiffaulty.

Milky/cloudywater

Oxygenatedwater

Waterfromanypressurizedsystemwillreleaseoxygen

bubbleswhenflowing.Thebubbleswillsettleout.

Nohotwaterflow

Coldmainoff Checkandopenstopcock

Stainerblockedinpressurereducingvalve Isolatewatersupplyandclean

Inletcontrolsetmaybefittedincorrectly Checkandrefitrequired

Noiseduringhotwaterdrawoff

–



typicallyworseinthemorning

Looseairingcupboardpipework Installextraclips

Hotorwarmwaterfromcoldtap

Iftaprunscoldafteraminuteorsothepipeispicking

upheatfromheatingpipework

Insulate/re‐route

GUARANTEE

The stainless steel vessel carries a fully EXCLUSIONS – THE GUARANTEE DOES NOT COVER: transferable 25‐year guarantee

againstfaultymaterialsormanufactureprovidedthat:

‐ IthasbeencorrectlyinstalledaspertheInstallation.Instructionsandalltherelevantstandards,regulationsandcodes

ofpracticeinforceatthetime.



‐ Ithasnotbeenmodiﬁedinanyway,otherthanbyBIASI.

‐ Ithasnotbeenmisused,tamperedwithorsubjectedtoneglect.

‐ Thesystemisfedfromthepublicmainswatersupply.

‐ Ithasonlybeenusedforthestorageofpotablewater.

‐

Ithasnotbeensubjectedtofrostdamage.

‐ Theunithasbeenservicedannually.

‐ TheBenchmarkLogBookhasbeenﬁlledinaftereachannualservice.

‐ Theguaranteeperiodstartsfromthedateofpurchaseandnoregistrationisrequired.

Pleasenotethatinvoicesforservicingmayberequestedtoprovethattheunithasbeenservicedannually



Theexpansionvesselandcoldwatercontrolssupplied withBIASImodelscarrya2‐yearguarantee.Allothercomponentsﬁtted

to/orsuppliedwiththeunitcarrya2‐yearguarantee.



 

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EXCLUSIONS–THEGUARANTEEDOESNOTCOVER:

‐ Theeffectsofscalebuildup.

‐ Anylabourchargesassociatedwithreplacingtheunitoritsparts.

‐ Anyconsequentiallossescausedbythefailureormalfunctionoftheunit.



GUIDANCEINTHEEVENTOFAPROBLEM

Ifyouhaveaproblemintheﬁrstyear,contacttheplumberwhoﬁttedtheunit.Thereaftercontacttheplumberwhocarriesout

theannualservicingforyou.IfyourBIASISilverdevelopsaleakwewillsupplyyouwithanewone.Weaskforanominalupfront

payment

 to prevent fraud. We will require the original unit to be returned to us for inspection along with a copy of your

Benchmark Log Book. If it is conﬁrmed that it has failed within the terms of the guarantee your upfront payment will be

refunded.

If a component part

fails within the guarantee period, we will send you a new one without any upfront charge. Credit card

detailsmaybetakentopreventfraud.Weaskyoutopostthefaultypartbacktouswithinonemonthbyrecordeddelivery.

If you do not return the part we will

 charge you for it and for the postage and packing.If your part fails after the guarantee

period,wewillaskforupfrontpayment.

USERINSTRUCTIONS

Yourstainlesssystemisautomaticinnormaluseandrequiresonlyannualservicing.Youshouldemployacompetentinstallerto

performtheannualservicing.Normallythisistimedtocoincidewiththeannualboilerservice.



IFWATERISFLOWINGFROMTHESAFETYVALVESTHROUGHTHETUNDISHTHISINDICATESAFAULTCONDITION

ANDACTIONISNEEDED.



Ifthiswaterishot,turntheboilerand/ortheimmersionheateroff.Donotturnoffthewateruntilthedischargerunscool.The

dischargemayalsostop.

CALLOUTACOMPETENTPLUMBERTOSERVICETHEUNIT.

Tellthemyouhaveafaultonanunventedcylinder.Westockallthesparepartstheymayneed.



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TECHNICALSPECIFICATIONS

DIRECT

Topview

CAPACITY

[L]

A

[mm]

B

[mm]

C

[mm]

D

[mm]

E

[mm]

F

[mm]

WEIGHT

Empty[kg]

WEIGHT

Full[kg]

125 1045 812 647 287 272‐ 30 155

150 1205 972 757 287 272‐ 34 184

170 1325 1092 837 287 272‐ 37 207

200 1505 1272 957 287 272 1042 41 241

250 1825 1592 1167 287 272 1427 49 299

300 2105 1872 1242 287 272 1667 56 356

INDIRECT

Topview

CAPACITY

[L]

A

[mm]

B

[mm]

C

[mm]

D

[mm]

E

[mm]

F

[mm]

G

[mm]

H

[mm]

I

[mm]

WEIGHT

Empty[kg]

WEIGHT

Full[kg]

125 1045 812‐340 272 290 420 615‐ 35 158

150 1205 972‐340 272 290 420 615‐ 39 187

170 1325 1092‐ 327 272 290 490 690‐ 43 210

200 1505 1272 957 327 272 290 490 690 1042 47 244

250 1825 1592 1167 350 272 290 525 760 1427 57 303

300 2105 1872 1242 350 272 290 525 760 1667 64 360



Ø540

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SOLARUNVENTEDDIRECTSINGLECOILCYLINDER

DetailfortheinstallationofaSolarUnventedDirectcylinderinanelectrichome.

GENERAL

Wheninstalling this productit isessential theoverall installationmeets allcurrent legislationincluding, inparticular, thehigh

limitisolationrequirementsofBuildingRegulationG3.Thisdocumentisdesignedtoassistinachievingthataim.

WATER

ThepotablewaterconnectionandtundishdischargeconnectionaretobeconnectedinexactlythemannerdescribedinPages3

to7ofthismanual.

IMMERSIONHEATERS

Thestandardissueimmersionheatersaredesignedfordomesticusagewherethelowerheaterisconnectedtoalowrateoff‐

peak tariff and the upper heater used for occasional top‐up purposes. Heaters of this nature are not designed to be

permanentlylive.ForusageoutsideofdomesticparametersTitanium

immersionelementsarerecommended.

SOLARCONNECTIONS

Theflowandreturnfromthesolarheatsourcearetobeconnectedtotheindirectcoil.Eitherprimarycoilconnection(A)may

beutilisedasthefloworreturn.Thesolarsensor,suppliedaspartofthesolarcontrols,insertsintoPocketBandisheldin‐situ

withthe

blacksensorpocketretainingbungprovided.Itisnecessarytomountthesolarpumpinthereturnpipeworkwiththe

RWC / ORKLI two port valve (supplied  with the cylinder) installed between the cylinder and the pump.This valve is of the

poweredopen,sprungcloseddesignandiswired

throughtheImitITL100highlimitstatwhichinsertsintoPocketF.Twowiring

options for high limit isolation are provided in Fig. 1 and Fig. 2.The superior option is Fig. 2 which disconnects the pump

movementaswellasprovidesvalveclosure(seepages13and14).

SOLARUNVENTEDINDIRECTTWINCOILCYLINDER

With either format it is essential the overall installation meets all current legislation including, in particular, the high limit

isolationrequirementsofBuildingRegulationG3.Thisdocumentisdesignedtoassistinachievingthisaim.

UPPERCOIL

Theuppercoilisconnectedtothefossilfuel(notsolidfossilfuele.g.woodburnerorcoal)boileraspertheinstructionsforthe

UnventedIndirectsinglecoilmodelwiththelimitTLSCcontrolandhighlimitthermost atinsertedintopocketI(lowerdiagram

page14).Thewiringrequirementsare

asdepictedonpage13.

LOWERCOIL:SOLARINSTALLATION

Inasolarpoweredsystemthelowercoilisconnectedtothesolarheatsource.Eitherprimarycoilconnectionmaybeutilisedas

the flow or return. The solar cylinder sensor, supplied as part of the solar controls, inserts into pocket F (see page 14). It is

necessary tomount the

 solar pump  inthe return pipework with the RWC /ORKLItwo port valve (supplied with the cylinder)

installedbetweenthecylinderandthepump.Thisvalveisofthepoweredopen,sprungcloseddesignandiswiredthroughthe

ImitITL100 high limit stat which inserts into pocketL

(lowerdiagram page14).Two wiring options forhigh limit isolation are

providedinFig.1andFig.2page13.ThelmitITC100controlthermostatisnotrequiredinasolarinstallation.

LOWERCOIL:TWOBOILERINSTALLATION

Where the lower coil is to be used with a fossil fuel (not solid fossil fuel e.g. wood burner or coal) boiler, the pipework

requirementsareas perthatof aIndirectsingle coil cylinder describedearlierinthisbook. Electrically theImit ITC100 inserts

intoPocketF(seepage14)

tocontroltheboilerinputandtheImitITL100limitstatintoPocketL(lowerdiagrampage14).The

RWC/ORKLItwoportvalvemaybeinstalledintoeitherthefloworreturnpipework.WiringoftheITC100andITL100areasper

thewiringdetailusingtheImit

TLSConpage7.

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TYPICALSCHEMATICWIRINGDIAGRAM:SOLARHIGHLIMIT

CONTROL

Theseschematicwiringdiagrams depict anIMIThighlimit controlstatand the connectionsarenumbered accordingly.Where

analternativeissuppliedconnectaspermanufacturers’instructions.

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TECHNICALSPECIFICATIONS

SOLARDIRECT

Topview

CAPACITY

[L]

A

[mm]

B

[mm]

C

[mm]

D

[mm]

E

[mm]

F

[mm]

G

[mm]

H

[mm]

I

[mm]

J

[mm]

WEIGHT

Empty[kg]

WEIGHT

Full[kg]

200 1505 1272 957 327 272 290 490 690 1042 1254 47 244

250 1825 1592 1167 350 272 290 525 760 1427 1574 57 303

300 2105 1872 1242 350 272 290 525 760 1667 1854 64 360

SOLARINDIRECT

Topview

CAPACITY

[L]

A

[mm]

B

[mm]

C

[mm]

D

[mm]

E

[mm]

F

[mm]

G

[mm]

H

[mm]

I

[mm]

J

[mm]

K

[mm]

L

[mm]

WEIGHT

Empty

[kg]

WEIGHT

Full

[kg]

200 1505 1272 740 272 290 490 690 790 955 1042 1115 1254 51 246

250 1825 1592 882 272 290 525 760 932 1097 1427 1332 1574 63 306

300 2105 1872 740 272 290 525 760 1072 1237 1667 1472 1854 70 363

Ø 540

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SOLARUNVENTEDCYLINDERS

Solarcylinders have beendesigned specifically with Solar applications in mind.Featuring a purpose designedsolar coil, which

allowsmaximumheattransferofsolarenergyintothestoredwater,thecylindersaresuitableforusewithawiderangeofsolar

systemsnow available inthe UK andIreland andare

anefficientand environmentally friendly wayof providing Domestic Hot

Water.Solarcylindersalsoofferthebenefitofmainspressurehotwater–powerfulshowersandfastfillingbaths.



Solarcylindersareavailableinarangeofsizesfrom200L,250Land300litresandinDirectorIndirectversions.

Solarcylinders

aremanufacturedfromhighgradeDuplexstainlesssteel.

Solarcylindersaredesignedtoacceptheatinputfromarenewable/sustainable(i.e.Solar)heatsource.Wherethisinputdoes

not fully meet the desired temperature a guaranteed quantity of water can be heated to an acceptable temperature by the

householderstraditionalheatsourceofgas,oilorelectricity.

The Domestic Heating

 Compliance Guide document L1A and L1B provides excellent advice in sizing both cylinder designated

solarareas and heat exchangers to the surfacearea of the solar collectors. Using this guide are ableto offer sizing advicefor

specification.

WATERCAPACITIES(LITRES)

Model Capacity Reference

Lowercoil

surfacearea

LowerCoil

rating

Uppercoil

surfacearea

UpperCoil

rating

Heatuptime

Re‐heattime

Indirect

Direct

125 125DI

‐ ‐ ‐ ‐ 62min 48min

150 150DI ‐ ‐ ‐ ‐ 76min 63min

170 170DI ‐ ‐ ‐ ‐ 96min 75min

200 200DI ‐ ‐ ‐ ‐ 119min 91min

250 250DI ‐ ‐ ‐ ‐ 140min 118min

300 300DI ‐ ‐ ‐ ‐ 166min 141min

Indirect

125 125IN 0,59m² 16kW

‐ ‐ 23min 19min

150 150IN 0,59m² 16kW ‐ ‐ 28min 25min

170 170IN 0,71m² 19kW ‐ ‐ 34min 25min

200 200IN 0,71m² 19kW ‐ ‐ 41min 32min

250 250IN 0,84m² 23kW ‐ ‐ 47min 32min

300 300IN 0,84m² 23kW ‐ ‐ 52min 37min

Solar

Direct

200 200SD 0,71m² 19kW

‐ ‐ 35min 32min

250 250SD 0,84m² 23kW ‐ ‐ 39min 32min

300 300SD 0,84m² 23kW ‐ ‐ 43min 37min

Solar

Indirect

200 200SI 0,71m² 19kW 0,59m² 16kW 33min 32min

250 250SI 0,84m² 23kW 0,71m² 19kW 35min 32min

300 300SI 0,84m² 23kW 0,71m² 19kW 39min 37min

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SPECIFICATIONSUMMARY



MATERIALS

‐Innershell‐DuplexStainlessSteel

‐Coil‐StainlessSteelAISI316L

‐Bosses‐StainlessSteel

‐Everycylinderiswatertestedtoapressureof10bar.



INSULATION

‐Fireretardantpolyurethanefoam,nominalthickness45‐50mm.

‐ThefoamisCFC‐FreeandHCFC‐Free.

‐ThefoamhasanOzone

DepletionPotentialofZeroandaGlobalWarming



CASEWORK

‐Electrostaticallypaintedsteel



ANODE

‐Noneﬁtted/nonerequired



EXPANSIONVESSEL

‐

CONTROLSETTINGS

‐PressureReducingValve‐3Bar

‐ExpansionReliefValve‐6Bar

‐PressureandTemperatureReliefValve‐7Bar/90°C

‐HighLimitThermostatinDualThermostat

‐HighLimitThermostatinImmersionHeater

IMMERSIONHEATER

‐1¾”BSPParallelThreadedHead

‐LongLifeIncoloySheathedLowNoiseElement16”

‐LongLongLifeIncoloySheathedThermostatPocket

‐BrazedConstruction

‐CombinedThermostatandSafetyCutout

‐ElementRating3kWat240VA/C







NUFACTUR

instal

D b

unve

lationand

w.videira.pt

tedhotw

aintenanc

tercylinder

instruction

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7/20

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instal

unve

lationand

tedhotw

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tercylinder

instruction

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NOTES



BiasiUKLtd

CommercialRoad

LeamoreEnterprisePark

Walsall

WS27NQ



Telephonenumber:01922714600

Faxnumber:01922714626

Companywebsite:www.biasi.co.uk

Biasi 200DI Installation And Maintenance Instructions Manual

Brand: Biasi

Model: 200DI

Type: Installation And Maintenance Instructions Manual

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Biasi 200DI Installation And Maintenance Instructions Manual

Biasi 200DI Installation And Maintenance Instructions Manual

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