Troubleshooting Guide; Start Up Conditions; Thermal Expansion; Strange Sounds - Kenmore THE ECONOMIZER 153.333931 Owner's Manual

Troubleshooting Guide
Start Up Conditions
THERMAL EXPANSION
Water sup,ply systems may, because of such events as high line
pressure, rrequent cut-offs, the effects of water hammer among
others, have installed devices such as pressure reducing valves,
check valves, back flowpreventers, etc...to control these types of
_roblems. When these devices are not equipped with an internal
oy-pass, and no other measures are taken, the devices cause the
water system to be closed. As water is heated, it expands (ther-
mal ex_,ansion) and dosed systems do not allow for the expan-
sion 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 reac_ed, 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 cor-
rected.
It is recommended that any devices installed which could create a
dosed system have a by-pass and/or the system have an expan-
sion tank to relieve the pressure built by thermal expansion.
Thermal expansion tanks are available from Sears stores and
through the Sears Service Centers. Contact the local plumbing
inspector, water supplier and/or the Sears Service Center for
assistance in controlling these situations.
Thermal Expansion Tank Specifications
Model
Number
153.331020
153.331050
Tank Capacity Dimensions in Inches
In Gallons Diameter Length
2 8 inches 12_ inches
5 11 inches 14_ inches
Pipe Fitting
On Tank
_" Male
_" Male
HOT
COLD WATER HEATER
COLD WATER
bINLET FITTING
WATER HEATER
COLD WATER
INLET FITTING
HOT
O)
PRESSURE
REDUCING
VALVE WITH
BY.PASS
(i)
EXPANSION
TANK
(2)
PRESSURE G AUGE
WATER
SHUTOFF
RECOPIMENDED INSTALLATION
(VERTICAL MOUNTING)
FLOOR, C EIUNG
joist, ETC.
STRAPPING
O)
PRESSURE
REDUCING INLETCOLD
WATER
VALVE WITH
(I) B't_PASS SHUTOFF
EXPANSION _
Expansion Tank Sizing Chart
Water Heater Capacity (Gallons)
Inlet*
Water
Pressure
!40psi
50psi
!60psi
70psi
80psi
Expansion 30 40 50 66 82
Tank 2 2 2 5 5
Capacity 2 2 2 5 5
Needed 2 2 5 5 5
2 2 5 5 5
2 5 5 5 5
*Highest recorded inlet water pressure in a 24 hour period or
regulated water pressure.
NOTE: Expansion tanks are pre-charged with a 40 psi air
charge. If the inlet water pressure is higher than 40 psi, the
expansion tanks air pressure must be adjusted to match that
pressure, but must not be higher than 80 psi.
(2)
PRESSURE G AUGE
ALTERNATE RECOHHENDED
INSTALLATION
(HORIZONTAL MOUNTING)
STRANGE SOUNDS
Possible noises due to expansion and contraction of some metal
_arts during periods of heat-up and cool-down do not represent
narmfial or dangerous conditions.
Condensation causes sizzling and popping with the burner area
during heatin_ and cooling, periods and should be considered
normal. See _ondensation section.
24