19
plannInG the vent sYsteM
Plantheroute ofthevent systemfromthe exhaustelbowto the
plannedlocationoftheventterminal.
1. Layouttotalventsystemtouseaminimumofventpipeandelbows.
2.Thiswaterheateriscapableofventinguegasesequivalentto
25’(7.6m)of2”pipe,65’(19.8m)of3”pipe,or128’(39.0m)of
4”pipeaslistedinTable1.
TABLE 1
Number of 2” Maximum 3” Maximum 4” Maximum
90° Elbows Pipe - ft. (m) Pipe - ft. (m) Pipe - ft. (m)
 1 20(6.1) 60(18.3) 120(36.6)
 2 15(4.6) 55(16.8) 112(34.1)
 3 10(3.0) 50(15.2) 104(31.7)
 4 -- 45(13.7) 96(29.3)
 5 -- 40(12.2) 88(26.8)
 6 -- 35(10.7) 80(24.3)
Theminimumventlengthsforeachofthepipesizesisone90°plus
2’(61cm)ofstraightpipeandtheappropriatetermination.
note:Theequivalentfeet(m)ofpipelistedaboveareexclusive
ofthe termination.That is,thetermination, withaninstalled
screen,isassumedtobeinthesystemandtheremainderofthe
systemmustnotexceedthelengthsdiscussedabove.
3. Theexhaustelbowassemblyisdesignedtoacceptonlystraight
sectionsof2”pipe.Tostart,aminimumof2”(5.1cm)of2”pipe
mustbeinserted andgluedto theexhaustelbow assemblyif
utilizing3”or4”ventpipe.Usethesamemethodwiththeblower
inletifadirectventcongurationisutilized.
If using 2” inch vent pipe:
 Aminimumof2”(5.1cm)diametervent pipemustbeattached
totheexhaustelbowassembly.Thetotalsystemcannotexceed
thelengthsdiscussed above,whereeachelbow isequalto 5
equivalentfeet(1.5m)ofstraightpipe.
If using 3” or 4” inch vent pipe:
 Twoinches(5.1cm)of2”pipemustbe attachedtotheexhaust
elbowassemblybeforeaddingareducertoacquire thedesired
pipediameter.Anappropriatelysized45degreeelbow(supplied
locally-aschedule40DWV)ventterminalmustbeobtainedwith
anequivalentscreen(suppliedinventkit).Thetotalsystemcannot
exceedtheequivalentpipelengthsdiscussedabovewhereeach
elbowisequalto5feet(1.5m)ofstraightpipe(3”ventpipe)or8
feet(2.4m)ofstraightpipe(4”ventpipe).
u.s. InstallatIons:
note: ThisunitcanbeventedwithPVCpipematerials(CellularCore
ASTM-F891;DWVASTM-D2665orCSAB181.2;Schedule40,80,
120ASTM-D1785orCSAB137.3;orSDRSeriesASTM-D2241or
CSAB137.3),CPVCpipematerials(CPVC41ASTM-D2846orCSA
B137.6;Schedule40,80ASTM-F441orCSAB137.6;orSDRSeries
ASTM-F442),ABSpipematerials(Schedule40DWVASTM-D2661
orCSAB181.1orSchedule40DWVCellularCoreASTM-F628).The
ttings,otherthanthe TERMINATION should be equivalent to PVC-
DWVttingsmeetingASTMD-2665(UseCPVCttings,ASTMF-438
forCPVCpipeandABSttings,ASTMD-2661/3311forABSpipe).
IfCPVCorABSpipeandttingsareused,thenpropercementmust
beusedforalljoints,includingjoiningthepipe toTermination(PVC
Material).IflocalcodesdonotallowtheuseofthePVCtermination
whenamaterialotherthanPVCisusedforventing,thenanequivalent
ttingofthatmaterial maybesubstituted ifthescreenin thePVC
terminalisremovedandinsertedintothenewtting.
canadian Installation of this water heater must comply with can/
CSA B149.1 - Natural Gas and Propane Installation Code which
requires the vent system components be certied to ULC S636.
Thiswaterheaterhasbeendesigncertied tobeventedwithPVC
pipecertiedandmarkedascomplyingwithULCS636. Thiswater
heaterissuppliedwitha2inch22.5degreeterminationelbowthatisa
specialttingthatmustbeusedwiththeappliance.Anyoutletpiping,
ttingsandglueusedtoventthisappliancethatisnotsuppliedbythe
manufacturermustcomplywiththeULCS636requirements.
 PVCMaterialsshoulduseASTMD-2564GradeCement;CPVC
Materialsshoulduse ASTM F-493 Grade Cement and ABS
MaterialsshoulduseASTMD-2235GradeCement.
 Ifthewaterheaterisbeinginstalledasareplacementforanexisting
powerventedheaterinpre-existingventing,athoroughinspection
ofexistingventingsystemmustbeperformedpriortoanyinstallation
work.Verifythatcorrectmaterialasdetailedabovehasbeenused,
andthattheminimumormaximumventlengthsandterminallocation
asdetailedinthismanualhavebeenmet.Carefullyinspecttheentire
ventingsystemforanysignsofcracksorfractures,particularlyat
jointsbetweenelbowsandotherttingsandstraightrunsofvent
pipe.Checksystemforsignsofsaggingorotherstressesinjointsas
aresultofmisalignmentofanycomponentsinthesystem.Ifanyof
theseconditionsarefound,theymustbecorrectedinaccordancewith
theventinginstructionsinthismanualbeforecompletinginstallation
andputtingthewaterheaterintoservice.
note: a.Forwater heaters in locations with high ambient
temperatures(above100°F)it isrecommendedthat CPVCor
ABSpipeandttingsbeused.B.A22.5degreeelbow(2”vent
pipe)ora45degreeelbow(3”and4”ventpipe)withaninstalled
screen VENT TERMINAL must be used in all cases.
4. Therewillbesomeinstallationswherecondensatewillbeformed
inthehorizontalrunsof theventsystem. This condensate will
runintothecondensateelbow.Thewaterheaterisshippedwith
a condensate hose that attaches to the condensate elbow. No
otherteeorttingisrequired.
condensate
Thiswaterheaterisacondensingunitandrequiresadraintobelocatedin
closeproximitytoallowthecondensatetodrainsafely.Thecondensate
drainsfromtheunitattheexhaustteelocatedatthebottomoftheunit
(seegure16).Condensatefromthiswaterheaterismildlyacidic.
Pleasenotethatsomelocalcodesrequirethatcondensateistreated
byusingapHneutralizinglterpriortodisposal.
Cautionmustbeusedtoensurethatthedrainisfreeandclearofdebris
andwillnotallowbackowthroughthecondensatehose.Consideration
mustbegiven to avoid freezing of the condensate lines which could 
resultinexcessive build up of condensate inside the water heater.
Waterproofheattape may be required to prevent freezing of the condensate
lines. Please ensure that the outlet of the condensate drain does
notcreateaslipperyconditionwhichcouldleadtopersonalinjury.
condensatIon warnInG: thIs water heater Is a condensInG
unIt and requIres a draIn to Be located In close proXIMItY
to allow condensate to draIn safelY. the condensate
draIns froM unIt at the eXhaust elBow located at
BottoM of unIt. note: It Is IMportant that the condensate
hose not Be elevated aBove the eXhaust elBow, see
FIGURE 16. CONDENSATE BUILD-UP WILL BLOCK THE EXHAUST
outlet, whIch wIll cause IMproper operatIon.
FIGURE 16.