Owner manual

12
Watersupply systems may, because ofsuch events ashigh line
pressure,frequentcut-offs,theeffectsofwaterhammeramongothers,
haveinstalleddevicessuchaspressurereducingvalves,checkvalves,
backowpreventers,etc.tocontrolthesetypesofproblems.When
thesedevicesarenotequippedwithaninternalby-pass,andnoother
measuresaretaken,thedevicescausethewatersystemtobeclosed.
Aswaterisheated,itexpands(thermalexpansion)andclosedsystems
donotallowfortheexpansionofheatedwater.
Thewater withinthe waterheater tankexpands asit isheated and
increasesthepressureofthewatersystem.Iftherelievingpointofthe
waterheater’stemperature-pressurereliefvalveisreached,thevalvewill
relievetheexcesspressure.The temperature-pressure relief valve
is not intended for the constant relief of thermal expansion.Thisis
anunacceptableconditionandmustbecorrected.
Itisrecommended thatanydevicesinstalled whichcouldcreate a
closedsystemhaveaby-passand/orthesystemhaveanexpansion
tanktorelievethepressurebuiltbythermalexpansioninthewater
system.Expansiontanksareavailablefororderingthroughalocal
plumbingcontractor.Contactthelocalwatersupplierand/oraservice
agencyforassistanceincontrollingthesesituations.
NOTE: To protect against untimely corrosion of hot and cold
water ttings, it is strongly recommended that di-electric unions
or couplings be installed on this water heater when connected
to copper pipe.
All gas piping must complywith local codesand ordinances orwith the
NaturalGasandPropaneInstallationCode(CAN/CSAB149.1)whichever
applies.Copperandbrasstubingandttings(excepttinlinedcoppertubing)
shouldnotbeused.
FIGURE 10.
CHEMICAL VAPOR CORROSION
CORROSION OF THE FLUEWAYS AND VENT SYSTEM MAY OCCUR IF
AIR FOR COMBUSTION CONTAINS CERTAIN CHEMICAL VAPORS. SUCH
CORROSION MAY RESULT IN FAILURE AND RISK OF ASPHYXIATION.
Spraycan propellants, cleaningsolvents, refrigeratorand air
conditioningrefrigerants, swimmingpool chemicals, calcium and
sodiumchloride(watersoftenersalt),waxes,andprocesschemicals
aretypicalcompoundswhicharepotentiallycorrosive.
Donotstoreproductsofthissortneartheheater.Also,airwhichis
brought in contact withthe heater shouldnot contain anyof these
chemicals.Ifnecessary,uncontaminatedairshouldbeobtainedfrom
remoteoroutsidesources.Thelimitedwarrantyisvoidedwhenfailure
ofwaterheaterisduetoacorrosiveatmosphere.(Seelimitedwarranty
forcompletetermsandconditions).
WATER PIPING
HOTTERWATERCANSCALD:
Waterheaters are intendedto produce hotwater.Waterheated to
atemperature which will satisfy spaceheating, clotheswashing,
dishwashing, cleaning andother sanitizingneeds can scaldand
permanentlyinjureyou uponcontact. Somepeoplearemore likely
tobe permanently injuredby hot waterthan others.These include
theelderly,children,the inrm, orphysically/mentallyhandicapped.
Ifanyoneusinghotwaterinyourhometsintooneofthesegroups
orifthereisalocalcodeorstatelawrequiringacertaintemperature
wateratthehotwatertap,thenyoumusttakespecialprecautions.In
additiontousingthelowestpossibletemperaturesettingthatsatises
yourhotwaterneeds,ameanssuchasa*mixingvalveshouldbeused
atthehotwatertapsusedbythesepeopleoratthewaterheater,see
Figure2.Valvesforreducingpointofusetemperaturebymixingcold
andhotwaterarealsoavailable:
Consult a Qualied Installeror ServiceAgency. Follow manufacturer’s
instructionsforinstallationofthevalves.Beforechangingthefactorysettingon
thethermostat,readthe“TemperatureRegulation”sectioninthismanual.
Thiswaterheatershouldnotbeconnectedtoanyheatingsystemsor
component(s)usedwithanon-potablewaterheatingappliance.
All piping components connected tothis unit forspace heating
applicationsshouldbesuitableforusewithpotablewater.
Toxicchemicals,suchasthoseusedforboilertreatmentshouldnotbe
introducedintothissystem.
When the system requireswater for spaceheating at temperatures
higherthanrequiredfordomesticwaterpurposes,amixingvalvemustbe
installed.PleaserefertoFigure2forsuggestedpipingarrangement.
INSTALLING THE NEW WATER HEATER