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Toinsureproperventingofthisgas-firedwaterheater,the
correctventpipediametermustbeutilized,Anyadditionsor
deletionsofothergasappliancesonacommonventwiththis
waterheatermayadverselyaffecttheoperationofthewater
heater.Consultyourgassupplierif anysuchchangesare
planned.
Forproperventingin certaininstallations,a largerdiameter
ventpipemaybenecessary,ConsultyourlocalSearsService
Centerorgassupplierto aidyouindeterminingtheproper
ventingforyourwaterheaterfromtheventtablesinthecurrent
editionoftheNationalFuelGasCodeANStZ223,1/NFPA54,
Periodicallychecktheventingsystemforsignsofobstruction
ordeteriorationandreplaceifneeded,
Thecombustionandventilationairflowmustnotbeobstructed,
Thewaterheaterwithdrafthoodinstalledmustbeconnected
toa chimneyorlistedventpipesystem,whichterminatesto
theoutdoors,Neveroperatethewaterheaterunlessitisvented
totheoutdoorsandhasadequateairsupplytoavoidrisksof
improperoperation,explosionorasphyxiation,
Forproperdrafthoodattachment,thedrafthoodlegsmay
beangledslightlyinward,
Placethedrafthoodlegsinthereceivingholesonthetopof
thewaterheater.Thelegswillsnapintheholestogivea
tightfit.Securetwolegstotopwithsheetmetalscrews,
Placetheventpipeoverthedrafthood,Withtheventpipein
position,drillasmallholethroughboththeventpipeand
drafthood,Securethemtogetherwithasheetmetalscrew,
SeeFigure17.
DRAFT HOOD _ VENT_L $
so.% I" I e.ArTHO00
VENT TO OUTDOORS
DRAFT HOOD
FIGURE17.
Obstructed or deteriorated vent systems may present serious
health risk or asphyxiation.
The vent pipe from the water heater must be no less than the
diameter of the draft hood outlet on the water heater and must
slope upward at least 1/4 inch per linear foot (21 mm per meter).
See Figure 18,
CHIMNEY
All vent gases must be completely vented tothe outdoors of the
structure (dwelling). Install only the draft hood provided with
the new water heater and no other draft hoed.
Vent pipes must be secured at each joint with sheet metal
screws,
There must be a minimum of 6 inches (153 mm) clearance
between single wall vent pipe and any combustible material.
Fill and seal any clearance between single wall vent pipe and
combustible material with mortar mix, cement, or other
noncombustible substance. For other than single wall, follow
vent pipe manufacturer's clearance specifications. To insure
a tight fit of the vent pipe in a brick chimney, seal around the
vent pipe with mortar mix cement.
Failure to have required clearances between vent piping and
combustible material will result in a fire hazard.
Be sure vent pipe is propedy connected to prevent escape of
dangerous flue gases which could cause deadly asphyxiation.
• Flue gases may escape if vent
p_peis not connected
• Do not store corrosive chemicals
in vicini_' of water heater.
• Chemical corrosion of flue and
vent system can cause serious
injury or death.
• Contact a qualified installer or
service agency
Breathing carbon monoxide can cause brain damage
or death Always read and Lmderstand instruction manual
Chemical vapor corrosion of the flue and vent system may
occur if air for combustion contains certain chemical vapors.
Spray can propellants, cleaning solvents, refrigerator and air
conditioner refrigerants, swimming pool chemicals, calcium
and sodium chloride, waxes, bleach and process chemicals
are typical compounds which are potentially corrosive.
Gas Piping
Fire and Explosion Hazard
• Do not use water heater with
any gas other than the gas
shown on the rating plate
, Excessve pressure to gas
control valve can cause serious
injury or death
, Turn off gas lines during
installation
, Contact qualified installer or
service agency
FIGURE18.
15