A.O. Smith BL-80 User manual

1
Instruction Manual
PRINTED 1215 324258-002
KEEP THIS MANUAL IN THE POCKET ON HEATER FOR FUTURE REFERENCE
WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED.
ULTRA LOW NOX COMMERCIAL GAS WATER HEATERS
• For Your Safety •
AN ODORANT IS ADDED TO THE GAS USED
BY THIS WATER HEATER.
MODELS BL-80/BL-100
Series 100
INSTALLATION - OPERATION - SERVICE
- MAINTENANCE - LIMITED WARRANTY
PLACE THESE INSTRUCTIONS ADJACENT TO HEATER AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.
Read and understand this instruction
manual and the safety messages
herein before installing, operating or
servicing this water heater.
Failure to follow these instructions and
safety messages could result in death
or serious injury.
This manual must remain with the
water heater.
500 Tennessee Waltz Parkway
Ashland City, TN 37015
Low Lead Content
WARNING: If the information in these
instructions is not followed exactly, a fire
or explosion may result causing property
damage, personal injury or death.
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS:
Do not try to light any appliance.
Do not touch any electrical switch; do
not use any phone in your building.
Immediately call your gas supplier
from a neighbor’s phone. Follow the
gas supplier’s instructions.
If you cannot reach your gas supplier,
call the fire department.
Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
•
•
•
•

2
SAFE INSTALLATION, USE AND SERVICE...................... 3
APPROVALS ...................................................................... 3
GENERAL SAFETY INFORMATION.................................. 4
INTRODUCTION................................................................ 5
Abbreviations Used ..................................................... 5
 QualiedInstallerorServiceAgency........................... 5
 PreparingfortheNewInstallation ............................... 5
INSTALLATION CONSIDERATIONS ................................. 6
 RoughInDimensions.................................................. 6
 Thermometers............................................................. 7
 FactstoConsiderAboutTheLocation ........................ 7
 HighAltitude ................................................................ 8
 Clearances .................................................................. 8
Insulation Blankets ...................................................... 9
Hard Water .................................................................. 9
 CirculationPumps ....................................................... 9
INSTALLATION REQUIREMENTS .................................. 10
 GasSupplySystems................................................. 10
 GasPressureRequirements..................................... 10
 SupplyGasRegulator ............................................... 10
 MixingValves ............................................................ 10
 WaterPiping.............................................................. 11
 ClosedWaterSystems.............................................. 11
 ThermalExpansion ................................................... 11
 Temperature-PressureReliefValve......................... 11
 FillingtheWaterHeater............................................. 12
 AirRequirements....................................................... 12
 UnconnedSpace..................................................... 13
 ConnedSpace......................................................... 13
 FreshAirOpeningsforConnedSpaces .................. 13
 OutdoorAirThroughTwoOpenings.......................... 13
 OutdoorAirThroughOneOpening ........................... 13
 OutdoorAirThroughTwoHorizontalDucts............... 14
 OutdoorAirThroughTwoVerticalDucts ................... 14
 AirFromOtherIndoorSpaces .................................. 14
 Venting ...................................................................... 14
 GasPiping................................................................. 16
 SedimentTraps ......................................................... 17
LIGHTING & OPERATING INSTRUCTIONS ................... 18
TEMPERATURE REGULATION ...................................... 19
FOR YOUR INFORMATION............................................. 19
Start Up Conditions ................................................... 19
Operational Conditions.............................................. 20
PERIODIC MAINTENANCE............................................. 21
 VentingSystemInspection ........................................ 21
 BurnerInspection ...................................................... 21
 BurnerCleaning ........................................................ 21
 Housekeeping ........................................................... 21
 AnodeRodInspection............................................... 22
 Temperature-PressureReliefValveTest ................... 22
RECOMMENDED PROCEDURE FOR PERIODIC
REMOVAL OF LIME DEPOSITS FROM TANK
TYPE COMMERCIAL WATER HEATERS........................ 22
 DelimingSolvents...................................................... 23
 TankCleanoutProcedure.......................................... 23
 DelimingUsingFlo-JugMethod ................................ 23
 DrainingandFlushing ............................................... 24
 Service ...................................................................... 24
LEAKAGE CHECKPOINTS.............................................. 25
TROUBLESHOOTING GUIDELINES............................... 26
WATER PIPING DIAGRAMS............................................ 27
NOTES ............................................................................. 33
WARRANTY ..................................................................... 35
TABLE OF CONTENTS

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SAFE INSTALLATION, USE AND SERVICE
Theproperinstallation,useandservicingofthiswaterheaterisextremelyimportanttoyoursafetyandthesafetyofothers.
Manysafety-relatedmessagesandinstructionshavebeenprovidedinthismanualandonyourownwaterheatertowarnyouand
othersofapotentialinjuryhazard.Readandobeyallsafetymessagesandinstructionsthroughoutthismanual.Itisveryimportant
thatthemeaningofeachsafetymessageisunderstoodbyyouandotherswhoinstall,use,orservicethiswaterheater.
Allsafetymessageswillgenerallytellyouaboutthetypeofhazard,whatcanhappenifyoudonotfollowthesafetymessage,and
howtoavoidtheriskofinjury.
DANGER
WARNING
CAUTION
CAUTION
DANGER indicates an imminently
hazardous situation which, if not avoided,
will result in injury or death.
This is the safety alert symbol. It is used to alert you to
potential personal injury hazards. Obey all safety
messages that follow this symbol to avoid possible
injury or death.
WARNING indicates a potentially hazardous
situation which, if not avoided, could result
in injury or death.
CAUTION indicates a potentially hazardous
situation which, if not avoided, could result in
minor or moderate injury.
CAUTION used without the safety alert
symbol indicates a potentially hazardous
situation which, if not avoided, could result in
property damage.
APPROVALS
Low Lead Content

4
GENERAL SAFETY INFORMATION

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ThankYouforpurchasingthiswaterheater.Properlyinstalledand
maintained,itshouldgiveyouyearsoftroublefreeservice.
ABBREVIATIONS USED
AbbreviationsFoundInThisInstructionManual:
• UL-UnderwritersLaboratoriesInc.
• ANSI-AmericanNationalStandardsInstitute
• NFPA-NationalFireProtectionAssociation
• ASME-AmericanSocietyofMechanicalEngineers
• AHRI-Air-Conditioning,HeatingandRefrigerationInstitute
• CAN - Canada
• EPACT-EnergyPolicyAct
• CSA-CanadianStandardsAssociation
This gas-fired water heater is design certified by Underwriters
LaboratoriesInc.underAmericanNationalStandard/CSAStandard
forGasWaterHeatersANSIZ21.10.3•CSA4.3(currentedition).
QUALIFIED INSTALLER OR SERVICE AGENCY
Installationandserviceofthiswaterheaterrequiresabilityequivalent
tothatofaQualiedAgency(asdenedbyANSIbelow)intheeld
involved. Installation skills such as plumbing, air supply, venting,
gassupplyandelectricalsupplyarerequiredinadditiontoelectrical
testingskillswhenperformingservice.
ANSIZ223.12006Sec.3.3.83:“QualiedAgency”-“Anyindividual,
rm, corporation or company that either in person or through a
representativeisengagedinandisresponsiblefor(a)theinstallation,
testingorreplacementofgaspipingor(b)theconnection,installation,
testing, repair or servicing of appliances and equipment; that is
experiencedinsuchwork;thatisfamiliarwithallprecautionsrequired;
and that has complied with all the requirements of the authority
havingjurisdiction.”
Ifyouarenotqualied(asdenedbyANSIabove)andlicensedor
certiedasrequiredbytheauthorityhavingjurisdictiontoperforma
giventaskdonotattempttoperformanyoftheproceduresdescribed
in this manual. If you do not understand the instructions given in
thismanualdo not attempttoperformany procedures outlinedin
thismanual.
PREPARING FOR THE INSTALLATION
1. ReadtheGeneralSafetyInformationsection,page4ofthis
manual first and then the entire manual carefully.  If you
don’tfollowthesafetyrules,thewaterheaterwillnotoperate
properly.ItcouldcauseDE ATH,SERIOUSBODILYINJURY
AND/ORPROPERTYDAMAGE.
 This manual contains instructions for the installation,
operation,andmaintenanceofthegas-f iredwaterheater.It
alsocontainswarningsthroughoutthemanualthatyoumust
readandbeawareof.Allwarningsandallinstructionsare
essentialtotheproperoperationofthewaterheaterandyour
safety.Sincewecannotputeverythingonthefirstfewpages,
READ THE ENTIRE MANUAL BEFORE ATTEMPTING TO
INSTALL OR OPERATE THE WATER HEATER.
2.The installation must conform with these instructions and
thelocalcodeauthorityhavingjurisdiction.Intheabsence
oflocalcodes,theinstallationmustcomplywiththecurrent
editions of the National Fuel Gas Code, ANSI Z223.1/
NFPA54orCAN/CSA-B149.1theNaturalGasandPropane
Installation Code. All documents are available from the
CanadianStandardsAssociation,8501EastPleasantValley
Road, Cleveland, OH 44131. NFPA documents are also
available from the National Fire Protection Association, 1
BatterymarchPark,Quincy,MA02269.
3.Ifafterreading thismanualyouhaveanyquestionsordo
notunderstandanyportionoftheinstructions,callthelocal
gasutilityorthemanufacturerwhosenameappearsonthe
ratingplate.
4.Carefully plan the place where you are going to put the
water heater.  Correct  combustion, vent action, and vent
pipeinstallationareveryimportantinpreventingdeathfrom
possiblecarbonmonoxidepoisoningandfires,seeFigures
3 and 7.
 Examinethelocationtoensurethewaterheatercomplieswith
theFacttoConsiderAboutTheLocationsectioninthismanual.
5.ForCaliforniainstallationthiswaterheatermustbebraced,
anchored, or strapped to avoid falling or moving during
an earthquake.  See instructions for correct installation
procedures.InstructionsmaybeobtainedfromCalifornia
Office of the State Architect, 400 P Street, Sacramento,
CA 95814.
6.MassachusettsCoderequiresthiswaterheatertobeinstalled
in accordance with Massachusetts 248-CMR 2.00: State
PlumbingCodeand248-CMR5.00.
7. Complies with SCAQMD rule #1146.2 and districts having
equivalentNOxrequirements.
INTRODUCTION