EHFA400T48 Operation & Installation Manual

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Rinnai 7 HotoElectricStorageWaterHeaterOIM

ANODE

Thewaterheater isttedwitha sacricialanodetoextend it’slife. Itwillslowlydissipate whilstprotectingthe

cylinder.Thelifeofthewaterheatermaybeextendedbyarrangingforanauthorisedpersontoinspecttheanode

andreplaceitifrequired.Itisrecommendedthattheanodebeinspectedatleastevery5years.Thefactorytted

RinnaianodeisMagnesiumbased.Thisanodeissuitablewhenthetotaldissolvedsolids(TDS)contentinthe

watersupplydoesnotexceed600mg/L,whichisthecaseinmostareas.Inareaswherethetotaldissolvedsolids

(TDS)contentinthewatersupplyexceeds600mg/LtheRinnaialuminiumbasedanodeisrequired.

WATER QUALITY

Thewaterqualityofmostpublicsuppliesissuitableforthewaterheatingsystem.Thewaterqualityfrombore

wellsis generallyunsuitable forthe water heatingsystem. Referto the‘Warranty Conditions’ forwater quality

parametersandhowtheya󰀨ectthewarrantyconditions.Ifindoubtaboutthewaterquality,haveitcheckedagainst

theparameterslistedinthewarrantyconditions.Ifsludgeorforeignmatterispresentinthewatersupply,asuitable

strainerltershouldbeincorporatedinthewatersupplytothesystem.

OPERATIONAL OVERVIEW

(Howthehotwatersystemworks)

Single Element Model: A vitreous enamel lined steel cylinder stores water which is heated by a single

thermostaticallycontrolledheatingelement,locatedatthebaseofthecylinder.Thewaterheaterconnectsdirectly

tothemainswatersupply.TheheatingelementcanbeconnectedtoaContinuousorO󰀨-Peakelectricitysupply.

Thecontinuoussupplyisappropriatewhenthewaterheatercapacityislessthanthedailyusageofhotwater.The

O󰀨-Peaksupplyisappropriatewhenthewaterheatercapacityexceedsthedailyusageofhotwater.TheO󰀨-Peak

supplyallowsheatingonlyforsetperiodsandavolumeofwatersu󰀩cientfordailyusageisheatedduringtheset

periodandstored.TheO󰀨-Peaksupplyisusuallycheaper.Electricitysupplytypesandtari󰀨svaryaccordingtothe

localelectricityauthority.

Twin Element Model:Avitreousenamellinedsteelcylinderstoreswaterwhichisheatedbyatwinthermostatically

controlledheatingelements,oneelementislocatedatthebaseofthecylinder,whiletheotherislocatednearthe

top.Thewaterheaterconnectsdirectlytothemainswatersupply.Thebottomheatingelementheatsthewhole

contentsofcylinderandTopheatingelement(booster)onlyoperatesduringthehighdemandperiodstoheatthe

upperportionofthecontentsofthecylinder.Thetwoheatingelementsarewiredfornon-simultaneousoperation,

sothat onlyoneheating elementcanoperate atatime.The bottomheatingelement canbeconnected toan

O󰀨-Peakelectricitysupply,andthetopheatingelementtoacontinuouselectricitysupply.

Turning Water Heating System ‘OFF’

Ifthewaterheaterisnotgoingtobeusedforonlyafewdays,wesuggestyouleaveitswitchedon.Ifitisnecessary

toswitcho󰀨thewaterheater,theswitchisusuallymarkedandlocatedintheelectricitymeterboxofthebuilding.

Turning Water Heating System ‘ON’

Switchontheelectricsupplytotheheatingelements.Theswitchisusuallymarkedandlocatedintheelectricity

meterboxofthebuilding.Waterheatingwillnowoccurasrequired.Itmaytakeanumberofhoursbeforehotwater

isavailable.

DRAINING

WARNING

DrainingMUST BE carriedoutbyaqualiedperson.

WatermaybeHOT during draining.

Drainthewaterheaterasfollows:

1. Isolateorturn‘OFF’thewaterheaterattheelectricitysupply.

2. Closethecoldwaterisolationvalveattheinlettothewaterheater.

3. Closeallhotwatertaps.

4. OperatethePTRvalveeasinggear-gently.OperatingthePTRvalveeasinggearwillrelievethepressure

inthewaterheater.

5. Undothecoldwaterinletunion.Attachahosetothewaterheatersideoftheunion.Lettheotherendofthe

hosegotoadrain.

6. OperatethePTRvalveeasinggearagain.Thisallowsairintothewaterheaterandwillresultinwaterdraining

throughthehose.

IMPORTANT INFORMATION

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Operation & Installation Manual - Page 7