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User Manual - Page 14

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14
Mr. Heater Series Heater Operating Instructions and Owner’s Manual
COMMON VENTING - (2) Heaters (Horizontal and Vertical)
Model# H=6ft. H=8ft. H=15ft.
40,000BTU D=7" D=6" D=6"
60,000BTU D=7" D=6" D=6"
80,000BTU D=8" D=7" D=6"
100,000BTU D=8" D=8" D=7"
125,000BTU D=10" D=10" D=8"
150,00BTU D=10" D=10" D=8"
175,000BTU D=10" D=10" D=8"
SECTION 5
Venting / Ducting
General Requirements
Thisheatermustbeventedinaccordancewiththespecifications
containedinthismanualandwiththefollowingnationalcodes
andanystate,provincialorlocalcodeswhichmayapply:
•RefertoNationalFuelGasCodeNFPA54/ANSIZ223.1-latest
revision.
•CANADA:RefertoNaturalGasandPropaneInstallationCode
CSAB149.1-latestrevision.
Theheatermaybeventedtotheoutdoorseitherverticallyor
horizontally.
Optionaloutsideairsupplymaybedirectedtotheheater
horizontallyorvertically.
Besurethatthemethodselectedforventingheatercomplies
withallcodesasrequiredforeachparticularlocation
Theuseofsingle-wallventpipe(26gauge)isrecommended.A
sectionofdouble-wallventpipeisrecommendedwhenpassing
throughtherooforwall.
Exhaustendofheaterwillaccepta4'(10cm)ventpipeusing
theventadapter.Installtheventadapterwiththeseamontop,
secureallventjointswithaminimumof3#8x3/8"sheetmetal
screwsandsealalljointsusingahightemperaturesilicone
sealant.
Ifcondensationintheflueisaproblem,thefluelengthshould
beshortenedorinsulated.
Ventpipemustbeslopeddownwardawayfromtheburner
1/4"(.6cm)forever10'(3m).
VENTLENGTHS:
• Maximumtotalventlengthallowedinthirty(30’)feet.
• Maximumoutsideairsupplyductallowedthirty(30’)feet.
• Maximumtotalventlengthplusoutsideairsupplylength
shallnotexceedfifty(50’)feet.
NOTE:
Atotaloftwo(2)elbowsareallowedforventand
outsideairsupplycombination.Subtract5'feetperadditional
elbowfrommaximumlengthallowedif3ormoreelbowsare
used.
Installaminimum18"(30cm)straightlengthofductforair
intakeorventbeforeanyTeeorelbow.
Alternative Arrangements / Optional Equipment for Venting
Unvented Operation
a) Sufficientventilationmustbeprovidedintheamountof4
CFMper1,000BTU/hr.firingrate.
b) RefertoANSIZ223.1-latestrevision,NFPA-54andlocal
codesforadditionalinformation.
c) Useofoptionaloutsidecombustionairisnotrecommended
withunventedheatersduetopressureconsiderations.Refer
topage16
Horizontal Venting
a) Four(4”)inchO.D.fluepipeisrequired.Thirty(30’)feet
maximumlengthisrecommended.
b) Allfluejointsshouldbesealedusingsuitableproductsuch
asGeneralElectricRTV106orPermatexForm-A-GasketRed
HighTemperatureSiliconeAdhesiveSealant.
c) Donotinstallanyelbowor45fittingtobringventlower
thanthehorizontaltubesystem.
d) Ventterminalshouldbeinstalledataheightsufficientto
preventblockagebysnow.
1) Ventmustexitbuildingnotlessthanseven(7’)feet
abovegradewhenlocatedadjacenttopublicwalkways.
2) Ventmustterminateatleastthree(3’)feetaboveany
forcedairinletlocatedwithintenfeet(10’).
3) Ventmustterminateatleastfour(4’)feetbelow,four
(4’)feethorizontallyfrom,orone(1’)footaboveany
door,window,orgravityinletintoanybuilding.
4)Ventterminalshallbelocatedatleasttwelve(12”)inches
fromanyopeningthroughwhichventgasescouldenter
thebuilding.
5) Ventterminalmustbebeyondanycombustibleover
hang
Vertical Venting
a) Four(4”)inchO.D.fluepipe,maximumthirty(30’)feet
inlengthmaybeusedasshownwithapprovedventcap.
(SeeGeneralRequirementsonthispageforadditional
information.)
b) Aninsulatedthimblemayberequiredtopassthrough
combustiblestructures(checklocalcodes).
c) Allfluejointsshouldbesealedusingsuitableproducts(see
recommendationforhorizontalventing.)
Common Venting
a) Horizontalruntoventmustneverexceed75%ofthevertical
heightofthevent.RefertoANSIZ223.1-latestrevision,
NFA-54forproperventsizesandinstallation.
b) Openareaofcommonventmustequalthesumoftheopen
areaofindividualventsconnectedtoit.(Seechartbelow
anddiagrams-page14.)
c) Usedoublewallventasrequired(checkcodes.)
d) Alljointsmustbesealedusingsuitableproducts.
e) Connectionstocommonstackmustbepositionedtoavoid
directoppositionbetweenstreamsofcombustiongases.
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