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User Manual - Page 6

For EHFA400S36.

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Rinnai 6 HotoElectricStorageWaterHeaterOIM
SAFETY DEVICES
ForsafeoperationthiswaterheateristtedwithacombinationPressure&TemperatureReliefValve,athermostat
andanover-temperaturecutoutforeachheatingelement.
WARNING
DO NOT tamper with or remove safety devices.
DO NOToperatethiswaterheaterunlessallsafetydevicesarettedandinworkingorder.
Theoperationofthethermalcutoutindicatesapossiblydangeroussituation.DO NOT reset the
thermalcutoutuntilthewaterheaterhasbeenservicedbyaqualiedperson.
Pressure & Temperature Relief (PTR) Valve
Thisvalveislocatednearthetopofthewaterheaterandisessentialforsafeoperation.
WARNING
DO NOT sealorblocktheoutletofthePTRvalveoritsdrainpipe.
DO NOT replacethePTRvalvewithonethathasahigherpressureratingthanisspeciedfor
the water heater.
ThePTRvalveshouldbecheckedforperformanceorreplacedatintervalsnotexceeding5years,ormorefrequently
inareaswithahighincidenceofwaterdepositsbyaqualiedperson.Theeasinggearmustbeoperatedatleast
onceeverysixmonthsormorefrequentlyinareaswithahighincidenceofwaterdeposits.
WARNING
Failure to do this may result in the water heater cylinder failing or under certain circumstances,
exploding.Waterdischargedwillbeveryhot.Exercisecaretoavoidscaldinjury.Ifthevalvedoes
notsealagainwhentheeasinggearisclosed,contactRinnaitoarrangeinspectionbyaqualied
person.
Itisimportantyouraiseandlowertheeasinggeargently.Ifthevalvedoesnot
dischargewaterwhentheeasinggearleverislifted,theremaybeaserious
problemandthepowersupplyinthemeterbox(theswitchmarked‘Water
heater’or‘hotwater’)ortheisolatingswitchinstallednearthewaterheater
mustbeswitchedo󰀨immediately.ContactRinnaitoarrangeinspectionby
aqualiedperson.
ItisnormalforthePTRvalvetoreleaseasmallquantityofwaterthroughthedrainpipeduringheating.Ifthevalve
dribblesorleakscontinuously,tryeasingthevalvegearforafewseconds.Thismaydislodgeanyforeignmatter
andstopleakage.Ifleakagedoesnotstoptheremaybeaproblemasdetailedbelow:
•
Ifthereareheavyowsofwateruntilthewaterheateriscoldwhichthenstopsuntilthewaterreheatstheremay
beaseriousproblemandthepowersupplyinthemeterbox(theswitchmarked‘Waterheater’or‘hotwater’)or
theisolatingswitchinstallednearthewaterheatermustbeswitchedo󰀨immediately.ContactRinnaitoarrange
inspectionbyaqualiedperson.
•
Ifthereisasteadyowforlongperiods,oftenatnight,itmaybeasaresultofthewaterpressureexceedingthe
designpressureofthewaterheater.ContactyourinstallingplumberasaPressureLimitingValve(PLV)may
berequired.
Expansion Control Valve (ECV)
An ECVis recommended in all geographical areas wherethe water supplyhas a tendency tocause scaling,
includingSouthAustraliaandWesternAustralia.LocalregulatoryauthoritiesmayrequirethatanECVbetted.
TheECVistobesuppliedandttedbytheinstaller.RefertothesectionWaterQualityformoreinformationon
scalingwater.
IfanECVistted,operatetheeasinggearatleastonceeverysixmonthstoremoveanydepositsandtoverify
thatitisnotblocked.
TheECVshouldbecheckedforperformanceorreplacedatintervalsnotexceeding5years,ormorefrequentlyin
areaswithahighincidenceofwaterdepositsbyaqualiedperson.
ItisnormalanddesirablethattheECVallowsasmallquantityofwatertobedischargedthroughthedrainpipe
duringtheheatingcycle.Ifthevalvedribblesorleakscontinuously,operatetheeasinggearforafewseconds.This
maydislodgeanyforeignmatterandstopleakage.IfleakagedoesnotstopContactRinnaitoarrangeinspection
byaqualiedperson.
Gently lift lever
until water flows
from drain line,
lower lever gently
to close
WARNINGS & SAFETY
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