Kenmore 153.331020 Owner's Manual page 3

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.