A.O. Smith BL-80 User Manual

12
NOTE: In additionto the factoryinstalledTemperature-Pressure
ReliefValve on thewaterheater,eachremote storage tank that
maybeinstalledandpipedtoawaterheatingappliancemustalso
have its own properly sized, rated and approved Temperature-
PressureReliefValveinstalled.Callthetollfreetechnicalsupport
phonenumberlistedonthebackcoverofthismanualfortechnical
assistanceinsizingaTemperature-PressureReliefValveforremote
storagetanks.
Forsafeoperationofthewaterheater,theTemperature-Pressure
ReliefValvemustnotberemovedfromitsdesignatedopeningnor
plugged.TheTemperature-PressureReliefValvemustbeinstalled
directlyintothettingofthewaterheaterdesignedforthereliefvalve.
Installdischargepipingsothatanydischargewillexitthepipewithin
6inches(15.2cm)aboveanadequateoordrain,orexternaltothe
building.Incoldclimatesitisrecommendedthatitbeterminatedat
anadequatedraininsidethebuilding.Becertainthatnocontactis
madewithanyliveelectricalpart.Thedischargeopeningmustnot
beblockedorreducedinsizeunderanycircumstances.Excessive
length,over30feet(9.14m),oruseofmorethanfourelbowscan
causerestrictionandreducethedischargecapacityofthevalve.
No valve or other obstruction is to be placed between the
Temperature-PressureReliefValveandthetank.Donotconnect
dischargepipingdirectlytothedrainunlessa6”(15.2cm)airgapis
provided.Topreventbodilyinjury,hazardtolife,orpropertydamage,
therelief valve mustbe allowed todischarge water in adequate
quantitiesshouldcircumstancesdemand.Ifthedischargepipeis
notconnectedtoadrainorothersuitablemeans,thewaterow
maycausepropertydamage.
Water Damage Hazard
•
Temperature-Pressure Relief Valve discharge
pipe must terminate at adequate drain.
CAUTION
T&P Valve Discharge Pipe Requirements:
• Shallnotbesmallerinsizethantheoutletpipesizeofthevalve,
orhaveanyreducingcouplingsorotherrestrictions.
• Shallnotbepluggedorblocked.
• Shallnotbeexposedtofreezingtemperatures.
• Shallbeofmateriallistedforhotwaterdistribution.
• Shallbeinstalledsoastoallowcompletedrainageofboththe
Temperature-PressureReliefValveandthedischargepipe.
• Mustterminateamaximumofsixinchesaboveaoordrain
orexternaltobuilding.Incoldclimates,itisrecommended
thatdischargepipebeterminatedatanadequatedraininside
building.
• Shallnothaveanyvalveorotherobstructionbetweenthe
reliefvalveandthedrain.
Burn hazard.
Hot water discharge.
Keep clear of Temperature-
Pressure Relief Valve
discharge outlet.
TheTemperature-PressureReliefValvemustbemanuallyoperated
atleasttwiceayear.Cautionshouldbetakentoensurethat(1)no
oneisinfrontoforaroundtheoutletoftheTemperature-Pressure
ReliefValvedischargeline,and(2)thewatermanuallydischarged
will not cause any bodily injury or property damage because
thewatermaybeextremely hot. If after manually operatingthe
valve,itfailstocompletelyresetandcontinuestoreleasewater,
immediatelyclosethecoldwaterinlettothewaterheater,followthe
draininginstructionsinthismanual,andreplacetheTemperature-
PressureReliefValvewithaproperlyrated/sizednewone.
NOTE:ThepurposeofaTemperature-PressureReliefValveisto
preventexcessivetemperaturesandpressuresinthestoragetank.
The T&P valve is not intended for the constant relief of thermal
expansion.Aproperlysizedthermalexpansiontankmustbeinstalled
on all closed systems to control thermal expansion, see Closed
WaterSystemsandThermalExpansiononpage11.
If you do not understand these instructions or have any questions
regardingtheTemperature-PressureReliefValvecallthetollfreenumber
listedonthebackcoverofthismanualfortechnicalassistance.
FILLING THE WATER HEATER
Neverusethiswaterheater unlessitiscompletelyfullofwater.To
preventdamagetothetank,thetankmustbelledwithwater.Water
mustowfromthehotwaterfaucetbefore turning “ON” gastothe
water heater.
Tollthewaterheaterwithwater:
1.Close the water heater drain valve by turning the handle to the
right(clockwise).Thedrainvalveisonthelowerfrontofthewater
heater.
2. Open the cold water supply valve to the water heater.
NOTE:Thecoldwatersupplyvalvemustbeleftopenwhenthe
water heater is in use.
3.Toinsurecompletellingofthetank,allowairtoexitbyopeningthe
nearesthotwaterfaucet.Allowwatertorununtilaconstantowis
obtained.Thiswillletairoutofthewaterheaterandthepiping.
4. Checkall waterpiping andconnectionsforleaks.Repairas
needed.
AIR REQUIREMENTS
Breathing Hazard - Carbon Monoxide Gas
Install water heater in accordance with
the Instruction Manual and NFPA 54 or
CAN/CSA-B149.1.
To avoid injury, combustion and ventilation
air must be taken from outdoors.
Do not place chemical vapor emitting
products near water heater.
Breathing carbon monoxide can cause brain damage or
death. Always read and understand instruction manual.
For safe operation an adequate supply of fresh uncontaminated air for
combustionandventilationmustbeprovided.
An insufcient supply of air can cause recirculation of combustion
products resulting in contamination that may be hazardous to life.
Suchaconditionoftenwillresultinayellow,luminousburnerame,
causingsootingofthecombustionchamber,burnersanduetubes
andcreatesariskofasphyxiation.
Donotinstallthewaterheaterinaconnedspaceunlessanadequate
supplyofairforcombustionandventilationisbroughtintothatspace
usingthemethodsdescribedintheConnedSpacesectionthatfollows.
Neverobstructthe owofventilationair.Ifyouhaveanydoubtsor
questionsatall,callyourgassupplier.Failuretoprovidetheproper

A.O. Smith BL-80 Specifications

General

Brand	A.O. Smith
Model	BL-80
Category	Water Heater
Language	English