Kenmore POWERMISE 12 User manual

1
www.sears.com
Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.A
Owner’s Manual
FOR POTABLE WATER HEATING ONLY
NOT SUITABLE FOR SPACE HEATING
NOT FOR USE IN MOBILE HOMES
MODEL NO. CAPACITY
153.331761 74 Gallon (280 Liter)
For Your Safety
AN ODORANT IS ADDED TO THE GAS USED
BY THIS WATER HEATER.
• SafetyInstruction
• Installation
• Operation
• CareandMaintenance
• Troubleshooting
• PartsList
POWERMISER™ 12
GAS WATER HEATER
Si no puede leer o entender el inglés y necesita el manual
instructivo y/o etiquetas en español puede obtenerlos llamando al
1-800-821-2017. NO TRATE DE INSTALAR O OPERAR ESTE
CALENTADOR DE AGUA si no entiende la información en las etiquetas
o en el manual instructivo. No hacer caso de esta advertencia podría
resultar en la MUERTE O GRAVES LESIONES CORPORALES.
ADVERTENCIA
PRINTED 1208 186079-001

2
SAFE INSTALLATION, USE AND SERVICE
Yoursafetyandthesafetyofothersisextremelyimportantintheinstallation,useandservicingofthiswaterheater.
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.
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.
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.
TheCaliforniaSafeDrinkingWaterandToxicEnforcementActrequirestheGovernorofCaliforniatopublishalistofsubstances
knowntotheStateofCaliforniatocausecancer,birthdefects,orotherreproductiveharm,andrequiresbusinessestowarnof
potentialexposuretosuchsubstances.
ThisproductcontainsachemicalknowntotheStateofCaliforniatocausecancer,birthdefects,orotherreproductiveharm.This
appliancecancauselowlevelexposuretosomeofthesubstanceslisted.
IMPORTANT DEFINITIONS
• Gas Supplier: The natural gas or propane utility or service who supplies gas for utilization by the gas burning
appliances within this application. The gas supplier typically has responsibility for the inspection and code approval of
gas piping up to and including the natural gas meter or propane storage tank of a building. Many gas suppliers also
offer service and inspection of appliances within the building.
DANGER
WARNING
CAUTION
DANGERindicatesanimminentlyhazardous
situationwhich,ifnotavoided,willresultin
deathorinjury.
WARNINGindicatesapotentiallyhazardous
situationwhich,ifnotavoided,couldresult
indeathorinjury.
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.
CAUTION
© Sears, Roebuck and Co.

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SAFETY PRECAUTIONS

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TABLE OF CONTENTS
SAFE INSTALLATION, USE AND SERVICE..................................................................................................................2
SAFETY PRECAUTIONS...............................................................................................................................................3
TABLE OF CONTENTS..................................................................................................................................................4
CUSTOMER RESPONSIBILITIES .................................................................................................................................5
PRODUCT SPECIFICATIONS .......................................................................................................................................5
MATERIALS AND BASIC TOOLS NEEDED ..................................................................................................................6
Material Needed .......................................................................................................................................................6
Basic Tools................................................................................................................................................................6
TYPICAL INSTALLATION...............................................................................................................................................7
INSTALLATION INSTRUCTIONS .............................................................................................................................8-17
Removing the Old Water Heater...............................................................................................................................8
Facts to Consider About the Location..................................................................................................................9,10
Insulation Blankets ............................................................................................................................................ 10,11
Combustion Air and Ventilation for Appliances
 LocatedinUnconnedSpaces............................................................................................................................... 11
Combustion Air and Ventilation for Appliances
 LocatedinConnedSpaces.............................................................................................................................. 11,12
Water Piping ......................................................................................................................................................12,13
Temperature Pressure Relief Valve ...................................................................................................................14,15
Filling the Water Heater ..........................................................................................................................................15
Venting...............................................................................................................................................................15,16
Gas Piping .........................................................................................................................................................16,17
Sediment Trap ........................................................................................................................................................17
OPERATING INSTRUCTIONS................................................................................................................................18,19
Lighting & Operating Label .....................................................................................................................................18
Temperature Regulation .........................................................................................................................................19
SERVICE AND ADJUSTMENT ...............................................................................................................................20-22
Tank (Sediment) Cleaning ......................................................................................................................................20
Venting System Inspection .....................................................................................................................................20
Burner Inspection ...................................................................................................................................................20
Burner Cleaning......................................................................................................................................................20
Housekeeping.........................................................................................................................................................21
Anode Rod Inspection ............................................................................................................................................21
Temperature-Pressure Relief Valve Operation .......................................................................................................21
Draining ..................................................................................................................................................................22
Service....................................................................................................................................................................22
TROUBLESHOOTING GUIDE................................................................................................................................23-26
Start Up Conditions ...........................................................................................................................................23,24
Thermal Expansion............................................................................................................................................23
Strange Sounds.................................................................................................................................................23
Draft Hood Operation ........................................................................................................................................23
Condensation ...............................................................................................................................................23,24
Smoke/Odor ......................................................................................................................................................24
Operational Conditions ......................................................................................................................................24,25
Smelly Odor.......................................................................................................................................................24
Air in Hot Water Faucets....................................................................................................................................24
High Temperature Shut-Off System...................................................................................................................24
Leakage Checkpoints ........................................................................................................................................25
Troubleshooting Items ............................................................................................................................................26
PARTS ORDER LIST ...................................................................................................................................................27
WARRANTY .................................................................................................................................................................28

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Thank You for purchasing a Kenmore water heater. Properly
installed and maintained, it should give you years of trouble free
service. If you should decide that you want the new water heater
professionally installed by Sears call 1-800-4-MY-HOME®. They
will arrange for prompt, quality installation by Sears authorized
contractors.
AbbreviationsFoundInThisInstructionManual:
• UL-Underwriter’sLaboratories
• CSA-CanadianStandardsAssociation
• ANSI-AmericanNationalStandardsInstitute
• NFPA-NationalFireProtectionAssociation
• ASME-AmericanSocietyofMechanicalEngineers
• GAMA-GasApplianceManufacturersAssociation
• EPACT-EnergyPolicyAct
• This gas-fired water heater is design certified by UL
Underwriter’sLaboratoriesunderAmericanNationalStandard/
CSAStandardforGasWaterHeatersANSIZ21.10.3•CSA
4.3 (current edition).
• Readthe“SafetyPrecautions”section,page3ofthismanual
rstandthentheentiremanualcarefully.Ifyoudon’tfollow
the safety rules, the water heater will not operate properly. It
could cause DEATH, SERIOUS BODILY INJURY AND/OR
PROPERTY DAMAGE.
This manual contains instructions for the installation, operation,
andmaintenanceofthegas-redwaterheater.Italsocontains
warnings through out 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rstfewpages, READ THE
ENTIRE MANUAL BEFORE ATTEMPTING TO INSTALL OR
OPERATE THE WATER HEATER.
• The installation must conform with these instructions and
the local code authority having jurisdiction. In the absence
of local codes, installations should comply with the current
edition of The National Fuel Gas Code ANSI Z223.1/NFPA
54. This publication is available from the Canadian Standards
Association, 8501 East Pleasant Valley Rd, Cleveland
Ohio 44131, or The National Fire Protection Association, 1
Batterymarch Park, Quincy, MA 02269.
• If after reading this manual you have any questions or do
not understand any portion of the instructions, call the Sears
Service Center.
• 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 res.  See
gures1and8through14.
Examine the location to ensure the water heater complies
with the Facts to Consider About the Location section in this
manual.
• 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 your local
dealer,wholesaler,publicutilitiesorCaliforniaOfceofthe
State Architect, 400 P Street, Sacramento, CA 95814.
• 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.
• Complies with SCAQMD rule #1146.2 and districts having
equivalent NOx requirements.
CUSTOMER RESPONSIBILITIES
PRODUCT SPECIFICATIONS
RECOVERY MINIMUM DIMENSIONS
TANK TYPE RATE GALS. VENT PIPE DIAMETER IN INCHES (mm)
MODEL CAPACITY OF BTU PER HOUR INCHES INCHES HEIGHT TO
NUMBER IN GALS (LTRS) GAS RATE @ 100°F RISE (mm) (mm) JACKET TOP
 153.331761 74(280) NATURAL 75,100 72.8 4”(102) 26.38”(670) 57”(1,448)

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MATERIALS AND BASIC TOOLS NEEDED
Materials Needed
To simplify the installation Sears has available the installation parts shown below. You may or may not need all of these materials,
depending on your type of installation.
EXPANSION TANKS FOR THERMAL EXPANSION
CONDITIONS AVAILABLE IN 2 GALLONS
(7.6 LITERS) AND 5 GALLONS (18.9 LITERS)
CAPACITY THROUGH LOCAL SEARS STORE OR
SERVICE CENTER
FLEXIBLE WATER HEATER GAS
CONNECTOR WITH FITTINGS
METAL DRAIN PANS AVAILABLE IN
20” (508 mm) DIAMETER FOR WATER
HEATERS HAVING A DIAMETER 18” (457
mm) OR LESS, 24” (610mm) DIAMETER
FOR WATER HEATERS HAVING A
DIAMETER 22” (559 mm) OR LESS AND
AVAILABLE IN 28” (711 mm) DIAMETER
FOR WATER HEATERS HAVING A
DIAMETER 26” (660 mm) OR LESS
Basic Tools
You may or may not need all these tools, depending on your
type of installation. These tools can be purchased at your local
Sears Store.
• PipeWrenches(2)14”(356mm)
• Screwdriver
• TinSnips
• 6’(1.82m)TapeorFoldingRuler
• GardenHose
• Drill
• PipeDopeorTeonTape
Additional Tools Needed
WhenSweatSoldering
• TubingCuttersorHacksaw
• PropaneTank
• SoftSolder
• SolderFlux
• EmeryCloth
• WireBrushes
SLOT-HEAD SCREWDRIVER
PHILLIPS SCREWDRIVER
TIN SNIPS
PIPE WRENCH
PIPE DOPE
(SQUEEZE TUBE)
USE FOR WATER AND GAS
CONNECTIONS
DRILL
GARDEN HOSE 6 FOOT TAPE
ROLL OF TEFLON
TAPE (USE ONLY ON
WATER HEATER
CONNECTIONS)
HACKSAW
3/4” (19 mm) WIRE BRUSH
1/2” (13 mm) WIRE BRUSH
SOLDER
FLUX
ROLL OF LEAD-FREE
SOFT SOLDER
TUBING CUTTER
PROPANE
TORCH
ROLL OF
EMERY CLOTH

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TYPICAL INSTALLATION
GET TO KNOW YOUR WATER HEATER - GAS MODELS
A VentPipe
B Draft Hood
C Anode
D Hot Water Outlet
E Outlet
F Water Connections
 G GasSupply
 H ManualGasShut-offValve
* INSTALLINACCORDANCE
WITH LOCAL CODES.
* DRIP LEG AS REQUIRED
BY LOCAL CODES.
FIGURE 1.
I Ground Joint Union
 J DripLeg(SedimentTrap)
K Inner Door
L Outer door
M Union
 N InletWaterShut-offValve
O Cold Water Inlet
 P InletDipTube
 Q Temperature-PressureReliefValve
 R RatingPlate
 S FlueBafe(s)
 T GasControlValveThermostat
 U DrainValve
V Pilot and Main Burner
W Flue
X Metal Drain Pan
(V) PILOT & MAIN BURNER
* ALL PIPING MATERIALS TO BE
SUPPLIED BY CUSTOMERS.
TO VENT TERMINATION
ON ROOF
(T) THERMOSTAT
**CLOSED WATER SYSTEMS
ARE THOSE WITH BACK FLOW
PREVENTION DEVICES INSTALLED
IN THE INLET WATER SERVICE LINE.

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INSTALLATION INSTRUCTIONS
FIGURE 2.
RemovingtheOldWaterHeater
FIGURE 3.
FIGURE 4.
3.Checkagaintomakesurethegassupplyis“OFF”tothewater
heater. Then disconnect the gas supply connection from the
gas control valve.
4. Attach a hose to the water heater
drain valve and put the other end in
aoordrainoroutdoors.Openthe
water heater drain valve. Open a
nearby hot water faucet which will
relieve pressure in the water heater
and speed draining. The water
passing out of the drain valve may
be extremely hot. To avoid being
scalded, make sure all connections
aretightandthatthewaterowis
directed away from any person, see
Figures 2 and 5. FIGURE 5.
5. Disconnect the vent pipe from the draft hood where it connects
to the water heater. In most installations the vent pipe can
be lifted off after any screw or other attached devices are
removed. Dispose of the draft hood. The new water heater
has a draft hood which must be used for proper operation.
6. If you have copper piping to the water heater, the two copper
water pipes can be cut with a hacksaw approximately four
inches away from where they connect to the water heater,
see Figure 6. This will avoid cutting off pipes too short.
Additional cuts can be made later if necessary. Disconnect the
temperature-pressure relief valve drain line. When the water
heater is drained, disconnect the hose from the drain valve.
Close the drain valve. The water heater is now completely
disconnected and ready to be removed.
FIGURE 6.
If you have galvanized pipes to the water heater, loosen
the two galvanized pipes with a pipe wrench at the union
in each line. Also disconnect the piping remaining to the
water heater, see Figure 7. These pieces should be saved
since they may be needed when reconnecting the new water
heater. Disconnect the temperature-pressure relief valve
drain line. When the water heater is drained, disconnect
the hose from the drain valve. Close the drain valve. The
water heater is now completely disconnected and ready
to be removed. Mineral buildup or sediment may have
accumulated in the old water heater. This causes the water
heater to be much heavier than normal and this residue, if
spilled out, could cause staining.
FIGURE 7.
1. Turn“OFF”thegassupplytothe
water heater.
If the main gas line Shut-off valve
serving all gas appliances is used,
also shut “OFF” the gas at each
appliance. Leave all gas appliances
shut “OFF” until the water heater
installation is completed, see
Figures 2 and 3.
2.Turn“OFF” thewatersupply to
the water heater at the water shut
off valve or water meter. Some
installations require that the water
be turned off to the entire house,
see Figures 2 and 4.

9
FactstoConsiderAbouttheLocation
Carefully choose an indoor location for the new water heater,
because the placement is a very important consideration for the
safety of the occupants in the building and for the most economical
use of the appliance. This water heater is not for use in
manufactured(mobile)homesoroutdoorinstallation.
Whether replacing an old water heater or putting the water heater
in a new location, the following critical points must be observed:
• Select a location indoors as close as practical to the gas
vent or chimney to which the water heater vent is going to be
connected, and as centralized with the water piping system
as possible.
• Selected location must provide adequate clearances for
servicing and proper operation of the water heater.
Installation of the water heater must be accomplished in such a
mannerthatifthetankoranyconnectionsshouldleak,theow
will not cause damage to the structure. For this reason, it is not
advisabletoinstallthewaterheaterinanatticorupperoor.When
such locations cannot be avoided, a suitable metal drain pan should
be installed under the water heater. Metal drain pans are available
at your local Sears or hardware store. Such a metal drain pan must
have a minimum length and width of at least 2 inches (51 mm)
greater that the water heater dimensions and must be piped to an
adequatedrain.Thepanmustnotrestrictcombustionairow.
Water heater life depends upon water quality, water pressure
and the environment in which the water heater is installed. Water
heaters are sometimes installed in locations where leakage may
result in property damage, even with the use of a metal drain pan
piped to a drain. However, unanticipated damage can be reduced
or prevented by a leak detector or water shut-off device used
in conjunction with a piped metal drain pan. These devices are
available from some plumbing supply wholesalers and retailers,
and detect and react to leakage in various ways:
• Sensorsmountedinthemetaldrainpanthattriggeranalarm
or turn off the incoming water to the water heater when leakage
is detected.
• Sensorsmountedinthemetaldrainpanthatturnoffthewater
supply to the entire home when water is detected in the metal
drain pan.
• Watersupplyshut-offdevicesthatactivatebasedonthewater
pressure differential between the cold water and hot water pipes
connected to the water heater.
• Devicesthatwillturnoffthegassupplytoagaswaterheater
while at the same time shutting off its water supply.
INSTALLATIONS IN AREAS WHERE FLAMMABLE LIQUIDS
(VAPORS) ARE LIKELY TO BE PRESENT OR STORED
(GARAGES, STORAGE AND UTILITYAREAS, ETC.): Flammable
liquids (such as gasoline, solvents, propane [LP or butane, etc.]
and other substances such as adhesives, etc.) emit ammable
vaporswhichcanbeignitedbyagaswaterheater’spilotlightor
mainburner.Theresultingashbackandrecancausedeathor
serious burns to anyone in the area, as well as property damage.
If installation in such areas is your only option, then the installation
mustbeaccomplishedinawaythatthepilotameandmainburner
ameareelevatedfromtheooratleast18inches.Whilethismay
reducethechancesofammablevapors,fromaoorspillbeing
ignited,gasolineandotherammablesubstancesshouldneverbe
stored or used in the same room or area containing a gas water
heaterorotheropenameorsparkproducingappliance.NOTE:
Flammable vapors may be drawn by air currents from other areas
of the structure to the appliance.
Also, the water heater must be located and/or protected so it is
not subject to physical damage by a moving vehicle.

10
This water heater must not be installed directly on carpeting.
Carpeting must be protected by metal or wood panel beneath
the appliance extending beyond the full width and depth of the
appliance by at least 3 inches (76.2 mm) in any direction, or if
theapplianceisinstalledinanalcoveorcloset,theentireoor
must be covered by the panel. Failure to heed this warning may
resultinarehazard.
Minimum clearances between the water heater and
combustible construction are 0 inch at the sides and rear,
4 inches (102 mm) at the front, and 6 inches (153 mm) from the
vent pipe, see Figure 8. Clearance from the top of the jacket is 12
inches (305 mm) on most models. Note that a lesser dimension
may be allowed on some models, refer to the label attached
adjacent to the gas control valve on the water heater.
FIGURE 8.
A gas water heater cannot operate properly without the correct
amount of air for combustion, see Figure 9. Do not install in a
connedareasuchasacloset,unlessyouprovideairasshown
in the Combustion Air and Ventilation for Appliances Located in
Conned Spacessection.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 amount of combustion air
canresultinareorexplosionandcausedeath,seriousbodily
injury, or property damage.
FIGURE 9.
If this water heater will be used in beauty shops, barber shops,
cleaning establishments, or self-service laundries with dry
cleaning equipment, it is imperative that the water heater or
water heaters be installed so that combustion and ventilation
air be taken from outside these areas.
Propellants of aerosol sprays and volatile compounds, (cleaners,
chlorine based chemicals, refrigerants, etc.) in addition to being
highlyammableinmanycases,willalsochangetocorrosive
hydrochloric acid when exposed to the combustion products of
the water heater. The results can be hazardous, and also cause
product failure.
Insulation Blankets
Insulation blankets available to the general public for external
use on gas water heaters are not necessary with Kenmore
products. The purpose of an insulation blanket is to reduce the
standby heat loss encountered with storage tank heaters. Your
Kenmore water heater meets or exceeds the EPACT standards
with respect to insulation and standby loss requirements, making
an insulation blanket unnecessary.
WARNING
Should you choose to apply an insulation blanket to this
heater, you should follow these instructions (See Figure 1 for
identicationofcomponentsmentionedbelow).Failuretofollow
these instructions can restrict the air ow required for proper
combustion, potentially resulting in re, asphyxiation, serious
personal injury or death.
• Do not apply insulation to the top of the water heater, as this
will interfere with safe operation of the draft hood.
• Do not cover the outer door, thermostat or temperature &
pressure relief valve.
• Do not allowinsulationtocomewithin2”(50.8mm)oftheoor
topreventblockageofcombustionairowtotheburner.

11
• Do not cover the instruction manual. Keep it on the side of
the water heater or nearby for future reference.
• Do obtain new warning and instruction labels from Sears for
placement on the blanket directly over the existing labels.
• Do inspect the insulation blanket frequently to make certain
itdoesnotsag,therebyobstructingcombustionairow.
Combustion Air and Ventilation for
AppliancesLocatedinUnconnedSpaces
UNCONFINED SPACE is space whose volume is not less than
50 cubic feet per 1,000 Btu per hour (4.8 m3per kW) of the
aggregate input rating of all appliances installed in that space.
Rooms communicating directly with the space in which the
appliances are installed, through openings not furnished with
doors,areconsideredapartoftheunconnedspace.
Inunconnedspacesinbuildings,inltrationmaybeadequate
to provide air for combustion, ventilation and dilution of ue
gases. However, in buildings of tight construction (for example,
weather stripping, heavily insulated, caulked, vapor barrier,
etc.), additional air may need to be provided using the methods
described in Combustion Air and Ventilation for Appliances
Located in Conned Spaces.
Combustion Air and Ventilation for
AppliancesLocatedinConnedSpaces
CONFINED SPACE is a space whose volume is less than
50 cubic feet per 1,000 Btu per hour (4.8 m3per kW) of the
aggregate input rating of all appliances installed in that space.
A.ALLAIRFROMINSIDEBUILDINGS:
(See Figure 9 and Figure 10)
The confined space should be provided with two permanent
openings communicating directly with an additional room(s)
of sufficient volume so that the combined volume of all
spaces meets the criteria for an unconfined space. The
total input of all gas utilization equipment installed in the
combined space should be considered in making this
determination. Each opening should have a minimum free
area of one square inch per 1,000 Btu per hour (22 cm2/
kW) of the total input rating of all gas utilization equipment
in the confined space, but not less than 100 square inches
(645 cm2). One opening should commence within 12 inches
(30 cm) of the top and one commencing within 12 inches (30
cm) of the bottom of the enclosures.
FIGURE 10.
B.ALLAIRFROMOUTDOORS: (See Figures 9, 11,12 and 13)
The conned space should be provided with two permanent
openings, one commencing within 12 inches (30 cm) of the top
and one commencing within 12 inches (30 cm) from the bottom
of the enclosure. The openings should communicate directly, or
by ducts, with the outdoors or spaces (crawl or attic) that freely
communicate with the outdoors.
FIGURE 11.
• Whendirectlycommunicatingwiththeoutdoors,eachopening
should have a minimum free area of 1 square inch per 4,000
Btu per hour (5.5 cm2/kW) of total input rating of all equipment
in the enclosure, see Figure 12.
FIGURE 12.
• When communicating with the outdoors through vertical
ducts, each opening should have a minimum free area of
1 square inch per 4,000 BTU per hour (5.5 cm2/kW) of
total input rating of all equipment in the enclosure, see
Figure 12 on page 11.
• Whencommunicating withthe outdoorsthrough horizontal
ducts, each opening should have a minimum free area
of 1 square inch per 2,000 BTU per hour (11 cm2/kW) of
total input rating of all equipment in the enclosure, see
Figure 14.
• Alternativelyasinglepermanentopeningmaybeusedwhen
communicating directly with the outdoors, or with spaces that
freely communicate with the outdoors. The opening should
have a minimum free area of 1 square inch per 3,000 BTU
per hour (8.3 cm2/kW) of total input rating of all equipment in
enclosure. See Figure 13.

12
FIGURE 13
• Whenductsareused,theyshouldbeofthesamecross-
sectional area as the free area of the openings to which they
connect. The minimum short side dimension of rectangular
air ducts should not be less than 3 inches (76.2 mm), see
Figure 14.
FIGURE 14.
• LouversandGrilles:Incalculatingfreearea,consideration
should be given to the blocking effect of louvers, grilles or
screens protecting openings. Screens used should not
be smaller than 1/4 inch (6.4 mm) mesh. If the free area
through a design of louver or grille is known, it should be
used in calculating the size opening required to provide
thefreeareaspecied.Ifthedesignandfreeareaisnot
known, it may be assumed that wood louvers will be 20-25
percent free area and metal louvers and grilles will have
60-75 percent free area. Louvers and grilles should be
xedintheopenpositionorinterlockedwiththeequipment
so that they are opened automatically during equipment
operation.
• SpecialConditionsCreatedbyMechanicalExhaustingor
Fireplaces: operation of exhaust fans, ventilation systems,
clothesdryersorreplacesmaycreateconditionsrequiring
special attention to avoid unsatisfactory operation of
installed gas utilization equipment.
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. Mixing valves are available at plumbing supply or
hardware stores, see Figure 15 below. Valves for reducing
point of use temperature by mixing cold and hot water
are also available. 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.
FIGURE 15.

13
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.
Water supply systems may, because of such events as high
line pressure, frequent cut-offs or 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. Refer
to the Thermal Expansion section under Troubleshooting Guide
or contact local plumbing authority or local Sears Service Center
on how to control this situation.
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.
Figure 16 shows the typical attachment of the water piping to
the water heater. The 74-gallon model water heater is equipped
with1”NPTwaterconnections.
TYPICAL INSTALLATION
FIGURE 16.
NOTE:Ifusingcoppertubing,soldertubingtoanadapter
beforeattachingtheadaptertothewaterconnections.Do
notsolderthewaterlinesdirectlytothewaterconnections
onthetank.Itwillharmthediptubeanddamagethetank.
• Lookatthetopcoverofthewaterheater.Thewateroutletis
marked“HOT”.Puttwoorthreeturnsofteontapearound
the exposed end of the NPT threaded nipple. Connect the hot
water pipe to the hot water outlet on the water heater. Please
note that adapters may be needed to match existing piping.
• Lookatthetopofthewaterheater.Thecoldwaterinlet
ismarked“COLD”.Puttwoorthreeturnsofteontape
around the exposed end of the NPT threaded nipple.
Connect the cold water pipe to the cold water inlet of the
water heater. Please note that adapters may be needed
to match existing piping.
NOTE: Thiswaterheaterissuperinsulatedtominimize
heatlossfromthetank.Furtherreductioninheatloss
canbeaccomplishedbyinsulatingthehotwaterlines
fromthewaterheater.

14
Temperature-PressureReliefValve
Thisheaterisprovidedwithaproperlycertiedcombination
temperature - pressure relief valve by the manufacturer.
The valve is certified by a nationally recognized
testing laboratory that maintains periodic inspection of
production of listed equipment of materials as meeting
the requirements for Relief Valves for Hot Water Supply
Systems, ANSI Z21.22, CSA 4.4 and the code requirements
of ASME.
If replaced, the valve must meet the requirements of local codes,
but not less than a combination temperature and pressure relief
valvecertiedasindicatedintheaboveparagraph.
The valve must be marked with a maximum set pressure not
to exceed the marked hydrostatic working pressure of the
water heater (150 psi = 1,035kPa) and a discharge capacity
not less than the water heater input rate as shown on the
model rating plate.
For safe operation of the water heater, the 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. Position the valve downward and provide
tubing so that any discharge will exit only within 6 inches
(153 mm) above a floor drain or external to the building,
see Figure 16. 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.
FIGURE 17.
No valve or other obstruction is to be placed between the
relief valve and the tank. Do not connect tubing directly
to discharge drain unless a 6 inch air gap is provided. To
prevent bodily injury, hazard to life, or property damage, the
relief valve must be allowed to discharge water in 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.
The Discharge Pipe:
• Shouldnotbesmallerinsizethantheoutletpipesizeofthe
valve, or have any reducing couplings or other
restrictions.
• Shouldnotbepluggedorblocked.
• Shouldbeofmateriallistedforhotwaterdistribution.
• Should be installed so as to allow complete drainage of
both the temperature-pressure relief valve, and the
discharge pipe.
• Shouldterminateamaximumofsixinchesaboveaoordrain
or external to the building.
• Shouldnothaveanyvalvebetweenthereliefvalveandtank.

15
The temperature-pressure relief valve must be manually
operated at least once 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, and replace the temperature-pressure relief valve
with a new one.
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:
• 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.
• 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.
• 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.
• Checkallwaterpipingandconnectionsforleaks.Repairas
needed.
Venting
VENT DAMPERS - Any vent damper, whether it is operated
thermally or otherwise must be removed if its use inhibits proper
drafting of the water heater.
Thermally Operated Vent Dampers: This gas-fired water
heaterhasa thermal efciency at or above80%whichmay
producearelativelylowuegastemperature.Suchtemperatures
may not be high enough to properly open thermally operated
ventdampers.Thiswouldcausespillageoftheuegasesand
may cause carbon monoxide poisoning.
Ventdampersmustbearevidenceofcerticationascomplying
with the current edition of the American National Standard
ANSI Z21.66/CGA 6.14, cover electrically and mechanically
actuated vent dampers). Before installation of any vent damper,
consult your local Sears Service Center or the local gas supplier
for further information.
Toinsureproperventingofthisgas-redwaterheater,thecorrect
vent pipe diameter must be utilized. Any additions or deletions
of other gas appliances on a common vent with this water heater
may adversely affect the operation of the water heater. Consult
your gas supplier if any such changes are planned.
For proper venting in certain installations, a larger diameter vent
pipe may be necessary. Consult your local Sears Service Center
or gas supplier to aid you in determining the proper venting for
your water heater from the vent tables in the current edition of
the National Fuel Gas Code ANSI Z223.1/NFPA 54.
Periodically check the venting system for signs of obstruction or
deterioration and replace if needed.
Thecombustionandventilationairowmustnotbeobstructed.
The water heater with draft hood installed must be connected
to a chimney or listed vent pipe system, which terminates to the
outdoors. Never operate the water heater unless it is vented
to the outdoors and has adequate air supply to avoid risks of
improper operation, explosion or asphyxiation.

16
• Forproperdrafthoodattachment,thedrafthoodlegsmay
be angled slightly inward.
• Placethedrafthoodlegsinthereceivingholesonthetop
of the water heater. The legs will snap in the holes to give a
tightt.Securethelegsofthedrafthoodwiththesupplied
draft hood brackets.
• Placetheventpipeoverthedrafthood.Withtheventpipe
in position, drill a small hole through both the vent pipe and
draft hood. Secure them together with a sheet metal screw,
see Figure 18.
FIGURE 18.
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 19.
FIGURE 19.
All vent gases must be completely vented to the outdoors of the
structure (dwelling). Install only the draft hood provided with the
new water heater and no other draft hood.
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specications.Toinsurea
tightt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rehazard.
Be sure vent pipe is properly connected to prevent escape of
dangerousuegaseswhichcouldcausedeadlyasphyxiation.
Chemicalvapor corrosionoftheue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
Make sure the gas supplied is the same type listed on the
model rating plate. The inlet gas pressure must not exceed
14 inch water column (3.5kPa) for natural gas. The minimum inlet
gas pressure listed on the rating plate is for the purpose of input
adjustment. If the gas control valve is subjected to pressures
exceeding 1/2 pound per square inch (3.5kPa), the damage
tothegascontrolvalvecouldresultinareorexplosionfrom
leaking gas.
If the main gas line shut-off serving all gas appliances is used, also
turn“OFF”thegasateachappliance.Leaveallgasappliancesshut
“OFF”untilthewaterheaterinstallationiscomplete.
A gas line of sufcient size must be run to the water heater.
Consult the current edition of National Fuel Gas Code ANSI
Z223.1/NFPA 54 and your gas supplier concerning pipe size.
There must be:

17
• Areadilyaccessiblemanualshutoffvalveinthegassupply
line serving the water heater, and
• Adripleg(sedimenttrap)aheadofthegascontrolvalvetohelp
prevent dirt and foreign materials from entering gas control valve.
• Aexiblegas connectororagroundjointunionbetweenthe
shut off valve and control valve to permit servicing of the unit.
Be sure to check all the gas piping for leaks before lighting the
water heater. Use a soapy water solution, not a match or open
ame.Rinseoffsoapysolutionandwipedry.
The minimum inlet gas pressure shown on the rating plate is that
whichwillpermitringattheratedinput.
Water heaters covered in this manual have been tested and approved
for installation at elevations up to 7,700 feet (2,347 m) above sea
level.Forinstallationabove7,700feet(2,347m),thewaterheater’s
Btu input should be reduced at the rate of 4 percent for each 1,000
feet (305 m) above sea level which requires replacement of the
burner orice in accordance with the National Fuel Gas Code
ANSI Z223.1/NFPA 54. Contact your local gas supplier for further
information.
Failuretoreplacethestandardoricewiththeproperhighaltitude
orice when installed at elevations above 7,700 feet (2,347 m)
couldresultinimproperandinefcientoperationoftheappliance,
producing carbon monoxide gas in excess of the safe limits. This
could result in serious injury or death. Contact your local gas supplier
foranyspecicchangesthatmayberequiredinyourarea.
The appliance and its gas connection must be leak tested before
placing the appliance in operation.
The appliance and its individual shut-off valve should be
disconnected from the gas supply piping system during any
pressure testing of that system at test pressures in excess of 1/2
pound per square inch (3.5 kPa). It should be isolated from the
gas supply piping system by closing its individual manual shut-off
valve during any pressure testing of the gas supply piping system
at test pressures equal to or less than 1/2 pound per square inch
(3.5 kPa).
Connecting the gas piping to the gas control valve of the water
heater can be accomplished by either of the two methods shown
in Figures 20 and 21.
SedimentTraps
Contaminants in the gas lines may cause improper operation of
thegascontrolvalvethatmayresultinreorexplosion.Before
attaching the gas line be sure that all gas pipe is clean on the
inside. To trap any dirt or foreign material in the gas supply line, a
drip leg (sometimes called a sediment trap) must be incorporated
in the piping. The drip leg must be readily accessible. Install in
accordance with the Gas Piping section. Refer to the current
edition of the National Fuel Gas Code, ANSI Z223.1/NFPA 54.
A sediment trap should be installed as close to the inlet of the
water heater as practical at the time of water heater installation. The
sedimenttrapshouldbeeitherateettingwithacappednipplein
the bottom outlet or other device recognized as an effective sediment
trap.Ifateettingisused,itshouldbeinstalledinconformancewith
one of the methods of installation, shown in Figures 20 and 21.
FIGURE 20. GAS PIPING WITH FLEXIBLE CONNECTOR.
FIGURE 21. GAS PIPING WITH ALL
BLACK IRON PIPE TO GAS CONTROL.

18

19
Never allow small children to use a hot water tap, or to draw their
own bath water. Never leave a child or handicapped person
unattended in a bathtub or shower.
NOTE: A water temperature range of 120°F-140°F (49°C-
60°C) is recommended by most residential dishwasher
manufacturers.
The thermostat of this water heater has been factory set at its
lowest position (PILOT LIGHTING). It is adjustable and must be
reset to the desired temperature setting to reduce the risk of scald
injury. The mark ( ) indicative of approximately 120°F (49°C)
is preferred starting point. Some states have a requirement for
a lower setting.
Turn the water temperature dial clockwise ( ) to decrease
the temperature, or counterclockwise ( ) to increase the
temperature.
Should overheating occur or the gas supply fail to shut off, turn
off the manual gas control valve to the appliance.
FIGURE 22.
Time to Produce 2nd & 3rd
TemperatureSetting DegreeBurnsonAdultSkin
VERY HOT = approx. 160°F (71°C) About 1/2 second
C = approx. 150°F (66°C) About 1-1/2 seconds
B = approx. 140°F (60°C) Less than 5 seconds
A = approx. 130°F (54°C) About 30 seconds
= approx. 120°F (49°C) More than 5 minutes
LOW = approx. 80°F (27°C) ----------------
FIGURE 23.
TemperatureRegulation
Due to the nature of the typical gas water heater, the water
temperature in certain situations may vary up to 30°F (16.7° C)
higher or lower at the point of use such as, bathtubs, showers,
sink, etc.
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, 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. Mixing valves
are available at plumbing supply or hardware stores. Follow
manufacturer’sinstructionsforinstallationofthevalves.Before
changing the factory setting on the thermostat, see Figures 22
and 23.

20
Tank(Sediment)Cleaning
Sediment build-up on the tank bottom may create varying amount
of noise, and if left in the tank will cause permanent tank failure.
In some water areas, you may not be able to drain all sediment
deposits by simply draining the tank. In these cases Mag-Erad
(part no. 23600) can be used to help remove the sediment
deposits. This may be ordered from the Sears Service Center.
For ordering, refer to the Parts Order List section.
VentSystemInspection
At least once a year a visual inspection should be made of the
venting system. You should look for:
• Obstructions which could cause improper venting.  The
combustionandventilationairowmustnotbeobstructed.
• Damageordeteriorationwhichcouldcauseimproperventing
or leakage of combustion products.
• Rustedakesaroundtopofwaterheater.
Be sure the vent piping is properly connected to prevent
escape of dangerous ue gasses which could cause deadly
asphyxiation.
Obstructions and deteriorated vent systems may present serious
health risk or asphyxiation.
Chemicalvaporcorrosionoftheue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.
If when inspecting the vent system you find sooting or
deterioration, something is wrong. Call the local gas supplier to
correcttheproblemandcleanorreplacetheueandventing
before resuming operation of the water heater.
BurnerInspection
Flood damage to a water heater may not be readily visible
or immediately detectable. However, over a period of time
a flooded water heater will create dangerous conditions
which can cause DEATH, SERIOUS BODILY INJURY, OR
PROPERTY DAMAGE. Contact a Sears Service Center to
replace a flooded water heater. Do not attempt to repair the
unit! It must be replaced!
At least once a year a visual inspection should be made of
the main burner and pilot burner, see Figure 24.
You should check for sooting. Soot is not normal and will
impair proper combustion.
Soot build-up indicates a problem that requires correction
before further use. Turn “OFF” gas to water heater and
leave off until repairs are made, because failure to correct
the cause of the sooting can result in a fire causing death,
serious injury, or property damage.
FIGURE 24.
BurnerCleaning
In the event your burner needs cleaning, following these
instructions:
If inspection of the burner shows that cleaning is required, turn
the gas control knob clockwise (  ) to the “OFF” position,
depressing slightly.
NOTE:Theknobcannotbeturnedfrom“PILOT”to“OFF”
unlessknobisdepressedslightly.DONOTFORCE.
Loose deposits on or around the burner can be removed by
carefully using the hose of a vacuum cleaner inserted through
the access door of the water heater. If the burner needs to be
removed for additional cleaning, call the Sears Service Center
to remove and clean the burner and correct the problem that
required the burner to be cleaned.
SERVICE AND ADJUSTMENT