VCSeriesManual 19
ConnectWaterHeatertoWaterSupply
WaterconnecƟonstothetanklesswaterheater
shouldfollowallstateandlocalplumbingcodes.
IfthisisastandardinstallaƟon,refertothePiping
DiagramforBasicInstallaƟon.
1. Plumbwatersupplytothetanklesswaterheater
onthe3/4”MNPTconnecƟonattheboƩom
of
theunitmarked“WaterInlet”,whichisthecold
watersupply.
2. Plumbthebuildinghotwatersupplytothe3/4”
MSPTconnecƟonmarked“WaterOutlet”,which
isthehotwatersupply.
Ifapipecoverwillbeinstalled,makesurewaterlines
tothewaterheaterfit.
ChecklistforPlumbing
පPurgethewaterlineofalldebrisandairby
closingthehotisolaƟonvalveandopeningthe
coldisolaƟonvalveanditsdrain.Debriswill
damagethewaterheater.Useabucketorhose
ifnecessary.
පEnsurethathotandcoldwaterlinesarenot
crossedtotheunitandareleakfree.
පEnsurethatapressurereliefvalveisinstalledwith
araƟngthatexceedstheBTUinputofthewater
heatermodel.RefertotheraƟngplateonthe
sideofthewaterheaterforBTUinput.
පCleantheinletwaterfilterbyclosingthecoldand
hotwaterinletisolaƟon(shutͲoī)valves.Puta
bucketunderthefilterattheboƩomofthewater
heatertocatchanywaterthatiscontainedinside
theunit.Unscrewthewaterfilter.Rinsethe
filtertoremoveanydebris.Installthefilterand
opentheisolaƟonvalves.
පCheckforproperwaterpressuretothewater
heater.Minimumwaterpressureis50psi.Rinnai
recommends60Ͳ80psiformaximum
performance.
InstallaƟonofGasSupply
MUSTDO
x Amanualgascontrolvalvemustbeplacedinthe
gassupplylinetothewaterheater.Aunioncanbe
usedontheconnecƟonabovetheshutoīvalve
forthefutureservicingordisconnecƟonofthe
unit.
x Checkthetypeofgasandthegasinletpressure
beforeconnecƟngthewaterheater.Ifthewater
heaterisnotofthegastypethatthebuildingis
suppliedwith,DONOTconnectthewaterheater.
Contactthedealerfortheproperunittomatchthe
gastype.
x Checkthegassupplypressureimmediately
upstreamatalocaƟonprovidedbythegas
company.Suppliedgaspressuremustbewithin
thelimitsshownintheSpecificaƟonssecƟonwith
allgasappliancesoperaƟng.
x BeforeplacingtheapplianceinoperaƟonalljoints
includingtheheatermustbecheckedforgas
ƟghtnessbymeansofleakdetectorsoluƟon,soap
andwater,oranequivalentnonflammable
soluƟon,asapplicable.(Sincesomeleaktest
soluƟons,includingsoapandwater,maycause
corrosion
orstresscracking,thepipingshallbe
rinsedwithwateraŌertesƟng,unlessithasbeen
determinedthattheleaktestsoluƟonisnonͲ
corrosive.)
x Useapprovedconnectorstoconnecttheunitto
thegasline.Purgethegaslineofanydebris
beforeconnecƟontothewaterheater.
GeneralInstrucƟons
WARNING
1. Ifyouarenotknowledgeableorqualifiedto
installgaslinesorconnecƟons,thencontacta
licensedprofessionaltoinstallthegassupply.
2. Turnoī120vpowersupply.
3. Turnoīthegas.
4. Gasisflammable.Donotsmokeorprovideother
igniƟonsources
whileworkingwithgas.
5. DonotturnonthewaterheaterorgasunƟlall
fumesaregone.