Kenmore 153.331020 User manual

Owner's Manual
THERMAL EXPANSION
TANK
FOR POTABLE WATER USE ONLY
MODEL NO.
153.331020 2Gal.
153.331050 5Gal.
•Safety instructions
•Installation
•Maintenance
Thank You for purchasing a Kenmore Thermal Expansion Tank.
Properly installed and maintained, it should give you years of
trouble free service. If you want this expansion tank
professionally installed by Sears contact your Salesperson.
They wilt arrange for prompt, quality installation by Sears
authorized contractors.
Read and understand manual and
safety messages before installing,
operating or servicing this thermal
expansion tank.
Failure to follow instructions and
safety messages could result in
death or serious injury,
SAVE THiS MANUAL FOR FUTURE REFERENCE.
Sears, Roebuck and Co,, Hoffman Estates, IL 60179 U,S,A
PRINTED INTHE U.S.A. 0506 www.sears.com PART NO. 205703-000

Yoursafetyandthesafetyofothersis extremely important in the installation, use and servicing of this expansion tank.
Many safety-related messages and instructions have been provided in this manual and on your own expansion tank to warn you and
others of apotential 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
expansion tank.
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.
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
injuryor death.
WARNING indicates apotentially hazardous
situation which, if not avoided, could result
in injuryor death.
CAUTION indicates apotentially hazardous
situation which, if not avoided, may resultin
minor or moderate injury.
IMPORTANT DEFINITION:
•Qualified Installer: A qualified installer must have ability equivalent to a licensed tradesman in the field of plumbing and have a thorough
understanding of the applicable local plumbing codes.
Read and understand manual and
safety messages before installing,
operating or servicing this thermal
expansiontank.
Failure to follow instructions and
safety messages could result in
death or serious injury.
improper installation and use may be hazardous and
can result in property damage.
,Install inaccordance with local codes.
Refer to manual for instruction and service.
_losion Hazard
• Temperature-pressure relief
valve must comply with ANSI
Z21.22 and ASME code.
• Overheated water can cause
water tankexplosion.
• Properly sized temperature
and pressure relief valve
must be installed in opening
provided.
• Failure to follow these
instructions could result in
death or serious injury.
,Burn hazard.
•Hot water discharge.
• Keep clear of relief valve
discharge outlet.

SAFEINSTALLATIONUSEANDSERVICE...........................................2
GENERALSAFETY..............................................................................2
TABLEOFCONTENTS.........................................................................3
SPECIFICATIONS..................................................................................3
IMPORTANTINSTRUCTIONSBEFOREINSTALLATION........................4
LOCATINGTHENEWEXPANSIONTANK.............................................5
INSTALLINGTHEEXPANSIONTANK...................................................5
MAINTENANCE....................................................................................6
EXPANSION TANKS FOR WATER HEATERS TANK SPECIFICATIONS
Many local codes require back flow preventers, check valves or non-
reversing meters. Since these devices seal offthe system, an expansion
tank is required to prevent the water heater's relief valve from discharging
on every heating cycle. The Kenmore Thermal Expansion Tanks eliminate
this wasteful, costly and dangerous practice. Kenmore Thermal
Expansion Tanks are designed to be used for potable water storage at
a maximum pressure of 150 psi. DO NOT USEASTANDARD TANK. Use
the sizing chart to determine the correct size expansion tank for your
application.
PURPOSE OF EXPANSION TANKS
When water is heated it expands. Provision must be made for this
expansion in a closed hot water system. This precharged diaphragm
tank stores the expanded hot water then returns water to the system
when the pressure drops.
TO SYSTEM
CO LD WATER
WATE_
HEATER
T
EXPANSION
TANK
'_--- T & P
RELIEF
VALVE
BACKFLOW
PREVENTER
CAPACITY IN GALLONS 2 5
PRECHARGE PRESSURE IN PSi 38 38
DIMENSIONS "A" 12 3/4" 14 314';
DIMENSIONS "C" 8 3/8 _ 11 318"
DISCHARGE CONNECTION "E" 314" NPTM 3t4" NPTM
WEIGHT 6 LBS. 10.5 LBS.
A
-I
I-- c 4
EXPANSION TANK SIZING CHART
Assumed 140°F Temp and 150 Max. PSI Pressure.
EXPANSION TANK NEEDED
iNCOMING WATER HEATER CAPACITY (GALLONS)
WATER
PRESSURE 30 40 50 66 80 100 120
40 psi 2GAL 2GAL 2GAL 5GAL 5GAL 5GAL 5GAL
50 psi 2GAL 2GAL 2GAL 5GAL 5GAL 5GAL 5GAL
60 psi 2GAL 2GAL 5GAL 5GAL 5GAL 5GAL 5GAL
70 psi 2GAL 2GAL 5GAL 5GAL 5GAL 5GAL 5GAL
80 psi 2GAL 5GAL 5GAL 5GAL 5GAL 5GAL 5GAL
NOTE: Kenmore Expansion Tanks are pre-charged with a 38 psi air charge. If the inlet water pressure is higher than 38 psi, the expansion tank's
air pressure must be adjusted to match that pressure but must not be higher than 80 psi.

1.Besureinstallationmeetsalllocalplumbingcodes.
2.Ifyouarenotthoroughlyfamiliarwithplumbingandsafetypractices,
consultyourlocalSearsstoreorServiceCenterforfurther
information.
3.Checkthewaterheatertemperature-pressurereliefvalvefor
properoperation;replaceiffoundtobefaulty.
_losion Hazard
= Temperature-pressure relief
valve must comply with ANSI
Z21.22 and ASME code.
Overheated water can cause
water tankexplosion.
Properly sized temperature
and pressure relief valve
must be installed in opening
provided.
Failure to follow these
instructions could result in
death or serious injury.
When checking the temperature-pressure relief valve
operation, make sure 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 property
damage or bodily injury. The water may be extremely hot.
if the valve fails to completely reset and continues to release
water after manual operation, immediately close the cold
water inlet to the water heater, follow draining instructions,
and replace the temperature=pressure relief valve with a
new one.
Also read and follow additional information found in the water heater
manual concerning the temperature-pressure relief valve.
4. Read this owner's manual and the installation rules carefully. Ifyou
do not follow the safety rules, the expansion tank will not operate
properly. Itcould cause DEATH, SERIOUS BODILY INJURYAND/OR
PROPERTY DAMAGE.
5. If incoming water pressure to the home exceeds 80 psi, a pressure
reducing valve will be required. Recommended inlet water pressure
is 60 psi or less.
6. In order to determine incoming water pressure and for proper
adjustment of the pressure reducing valve, a pressure gauge must
be installed between the pressure reducing valve and expansion
tank.
7. The complete piping system, including expansion tank and
pressure reducing valve, MUST be protected against temperatures
below freezing. Failure to do so could cause severe water
damage.
8. To safeguard against a possible dangerous malfunction of the
expansion tank, review the installation instructions before putting
the water supply system back into operation.
This hydro-pneumatic tank is designed and intended for hot or cold
water storage at a maximum pressure of 150 pounds per square inch
gauge (150 PSIG). Any use other than with potable water or at a
sustained or instantaneous pressure in excess of 150 psi is UNSAFE.
A pressure relief valve of adequate size must be incorporated in the
water heater system. This expansion tank, as all tanks, will eventually
leak. Do not install without adequate drainage provisions where water
leakage will cause damage. Failure to follow these instructions can cause
an explosion and result in SERIOUS OR FATAL INJURY.
improper installation and use may be hazardous and
can result in property damage.
•Install inaccordance with local codes.
Refer to manual for instruction and service.

FACTS TO CONSIDER ABOUT THE LOCATION
1. The location selected should be indoors in an area not subject to
freezing.
2. The items which should be installed in the cold water line, in
sequence from the water heater, are (1) the EXPANSION TANK
(2) a PRESSURE GAUGE and (3)a PRESSURE REDUCING VALVE,
if required. See Figure 1.
WATER HEATER
COLD WATER iNLET
FITTING
HOT COLD
12)
PRESSURE
GUAGE
3.
(1)
EXPANSION
TANK
4.
The expansion tank is designed to be supported by the system piping
in the vertical position. If, however, the expansion tank must be installed
horizontally, as shown in Figure 2, it must be supported by adequate
strapping (not supplied).
The expansion tank, pipes, and your connections may, in time, leak. Put
the expansion tank in a place where a water leak will not damage
anything. The expansion tank should be located in an area where
water leakage from the tank or connections will not result in damage
to the area around the expansion tank or to the lower floors of the
structure.
WATER HEATER (I)
COLD WATER INLET EXPANSION
FITTING TANK FLOOR, CEILING,
JOINT, ETC.
13) I
PRESSURE HOT COLD STRAPPING 13)
REDUCING PRESSURE
VALVE WiTH REDUCING
BY-PASS VALVE WITH
BY-PASS
1 1
iNLET
COLD WATER 12} iNLET
SHUT=OFF PRESSURE COLD WATER
GUAGE SHUT-OFF
RECOMMENDED INSTALLATION -VERTICAL MOUNTING RECOMMENDED INSTALLATION - HORIZONTAL MOUNTING
FIGURE 1. FIGURE 2.
WATER PiPiNG
This expansion tank is designed for operation on the inlet cold
water line and is limited to a maximum working pressure of
150 pounds per square inch (psi).
Figures 1 and 2 above show the correct valves and fittings that you will
need to install your expansion tank. A threaded (3/4")water connection
is supplied on the tank bottom.
FOLLOW THE INSTALLATION INSTRUCTIONS FOUND iN THE
PACKAGING OF THE PRESSURE REDUCING VALVE AND PRESSURE
GAUGE.
1. The water supply and power (electricity or gas) must be shut off
during the installation of the valves and expansion tank. Follow the
instructions found on the water heater and in the owner's manual.
2. Install expansion tank, pressure gauge, and pressure reducing valve,
if required, as shown above in Figures 1and 2.
3. After installing the expansion tank, pressure gauge, and pressure
reducing valve, it will be necessary to expel all air from the piping.
Turn the cold water inlet shut-off valve "ON." To purge the air, open a
faucet and wait until a steady stream of water is coming from the
faucet. At this time, close the faucet.
ADJUSTING WATER PRESSURE
1. Recommended inlet water pressure is 60 psi or less.
2. Refer to the pressure gauge. Using the adjusting screw on the
pressure reducing valve, increase or decrease the pressure as
indicated on the valve.
3. Open a nearby faucet allowing water to run briefly and then close
the faucet. Check pressure gauge again and make additional screw
adjustments as necessary. It may be necessary to repeat this
procedure several times before the pressure can be adjusted to
60 psi or less.
CHECKING EXPANSION TANK AiR CHARGE
1. Shut off main cold water supply valve.
2. Open a nearby faucet allowing water to run until it stops. This
indicates the pressure has been relieved.
3. Using a tire gauge, check the expansion tank's pre-charge pressure
(38 psi). The expansion tank air charge must be adjusted to
match the incoming water pressure. If the air charge pressure
needs to be adjusted upward, use only a manual type tire pump to
increase the pressure. If the air charge needs to be reduced, depress
the valve core to release pressure.
4. Open the cold water supply valve.
5. Now the water heater can be put back into operation. Follow
instructions found on the water heater and in the manual.
5

WATER HEATER TEMPERATURE-PRESSURE
RELIEF VALVE
The temperature-pressure relief valve on the water heater must be
manually operated at least once a year.
" Burn hazard.
• Hot water discharge.
" Keep clear of relief valve
discharge outlet.
TEMPERATURE=PRESSURE
DISCHARGE PiPE
When checking the temperature=pressure relief valve operation,
make sure 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 property
damage or bodily injury. The water may be extremely hot.
if the valve fails to completely reset and continures to release
water after manual operation, immediately close the cold water
inlet to the water heater, follow draining instructions, and
replace the temperature relief valve with anew one.
WEEPING TEMPERATURE-PRESSURE RELIEF VALVE
If the temperature-pressure relief valve on the water heater weeps or
discharges periodically, this may be due to one or more of the following:
1. The temperature-pressure relief valve may have become faulty.
Refer to your water heater manual for more information.
2. The inlet water pressure may be above the recommended 60 psi.
Follow the instructions in the "Adjusting Water Pressure" section.
3. The expansion tank's air charge pressure may not be adjusted to
match the incoming water pressure. Follow the instructions in the
"checking Expansion Tank Air Charge" section.
4. If all the above have been checked, adjusted and/or replaced, turn
the water heater off and contact Sears Service at 1-800-4-MY-
HOM E (1-800-469-4663).

Forin-home major brand repair service
Call 24 hours a day, 7 days a week (U.S.A. and Canada)
1-800-4-MY-HOME ®
(1-800-469-4663)
www.sears.com
The model number of your thermal expansion tank isfound on the model rating plate on the front of the thermal expansion tank.
Sears, Roebuck and Co,, Hoffman Estates, IL 60179 U,S,A