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Kenmore 153.331020 Owner's Manual page 3

Thermal expansion tank for potable water use only
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SAFE INSTALLATION
USE A ND SERVICE
...........................................
2
GENERAL
SAFETY
..............................................................................
2
TABLE
OF CONTENTS
.........................................................................
3
SPECIFICATIONS
..................................................................................
3
IMPORTANT
INSTRUCTIONS
BEFORE
INSTALLATION
........................
4
LOCATING
THE N EW EXPANSION
TANK ............................................
5
INSTALLING
THE E XPANSION
TANK . ...............................................
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.

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