VCSeriesManual 17
IsolaƟonValvesandPressureReliefValve
TheisolaƟonvalvesprovidetheabilitytoisolatethe
waterheaterfromthestructure’splumbingandallow
quickaccesstoflushtheheatexchanger.Checkwith
localcodestodetermineifapressureand
temperaturereliefvalveisrequired.Theincluded
valvesmeetAmerican NaƟonal Standard (ANSI
Z21.10.3) / Canadian Standard (CSA 4.3)andare
ANSI/NSF61
approvedforpotablewater.
IsolaƟonValvesInstallaƟonInstrucƟons:
1. Wraptheendsofthethreadedwaterinlet&
outletonthetanklesswaterheater,aswellas
thethreadedendoftheapprovedpressurerelief
valvewithaminimumof5wrapsofTeflon®
tape.
2.
Screwthepressurereliefvalveintothe3/4”
threadsoppositethewinghandleontheHOT
waterservicevalve.(REDdrainhandle)(see
PressureReliefValveSecƟonforproper
installaƟonrequirements)
3. Loosenthe3/4”unionnutontheHOTwater
valveandconnecttotheHOTwater
outleton
thetanklesswaterheater.Ifnutisremoved,
ensurethatyourealignthetailpieceaccurately
tothevalveandthattheblackwasheris
posiƟonedsuchthattheraisedmetaledgeof
thevalveisinsidethewasher.
4. AlignthedirecƟonoftheHOTwaterdrain
tothe
desiredposiƟon.
5. TightentheunionassemblytotheHOTwater
valveusingapproximately15footlbsoftorque.
6. Repeatsteps3Ͳ5fortheCOLDwatervalve.
(BLUEdrainhandle)forconnecƟontotheCOLD
waterinletonthetanklesswaterheater.
7. Connect
theINLETontheCOLDwatervalveto
theMAINSOURCEofthewatersupply.
8. ConnecttheOUTLETontheHOTwatervalveto
theHOTWATERplumbingsystem.
9. Ensurethatbothdrainvalveleverhandlesarein
theclosedposiƟon(perpendiculartothedrain
porƟonof
thebody).
PressureReliefValveInstallaƟonInstrucƟons:
ThePRVmustbeconnectedbythethreaded
connecƟonoppositethewinghandleonthehot
watervalve(designatedbytheREDdrainhandle)or
thethreadedconnecƟononthesideoftherelocaƟon
fiƫngabovethe
hotwatervalve.InstallaƟonmust
maintaina¾”portsizewithnoshutoīvalveorline
restricƟoninͲbetweentheapplianceandthePRV.The
dischargelinefromthePRVshouldpitchdownward
andterminate6”abovedrainswheredischargewill
beclearlyvisible.Thedischargeendof
thelineshall
beplain(unthreaded)andaminimumof¾”in
diameter.Thedischargelinematerialmustbe
suitableforwateratleast180°Fahrenheitandcanbe
nomorethan30feetinlengthandcontainnomore
than4elbowsorbends.Novalveofanytype
maybe
installedinthedischargelineofthepressurerelief
valve.
PressureReliefValveMaintenance:
Forpropercareofthisapprovedpressurereliefvalve,
itisrecommendedthatthevalveismanually
operatedonceayear.Indoingso,itwillbenecessary
totakeprecauƟonswithregardto
thedischargeof
potenƟallyscaldinghotwaterunderpressure.Ensure
dischargehasaplacetoflow.Contactwithyourbody
orotherpropertymaycausedamageorharm.
PleasenotethatonlythePRVinthispackageis
cerƟfiedbyCSAInternaƟonalasanapproveditem.
A PressureReliefValve(PRV)
B PRVDischargeOutlet
C HotBallValveDrainHandle
D ColdBallValveDrainHandle
A
B
C
D