Kenmore 58650 User Manual download pdf (Page 22)

Start Up Conditions

THERMAL EXPANSION

As water is heated, it expands (thermal expansion). In a closed

system, the volume of water will increase. As the volume of

water increases, there will be a corresponding increase in water

pressure due to thermal expansion. Thermal expansion can

cause premature tank failure (leakage). This type of failure is not

covered under the limited warranty. Thermal expansion can also

cause intermittent temperature-pressure relief valve operation:

water discharged from the valve due to excessive pressure build

up. The temperature-pressure relief valve is not intended for the

constant relief of thermal expansion. This condition is not covered

under the limited warranty.

A properly-sized thermal expansion tank should be installed

on all closed systems to control the harmful effects of 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 regarding the installation of a thermal expansion tank.

Table 2: Thermal Expansion Tank Speciﬁ cations

Model

Number

Tank

Capacity

In Gallons

Dimensions

in Inches

Pipe

Fitting

On TankDiameter Length

153.331021 2 8 (203 mm) 12-3/4 (323 mm) 3/4” Male

153.331051 5 11 (279 mm) 14-3/4 (375 mm) 3/4” Male

Table 3: Expansion Tank Sizing Chart

Expansion

Tank

Capacity

Needed

Inlet*

Water

Pressure

Water Heater Capacity (Gallons)

30 40 50 66 82

40 psi 22255

50 psi 22255

60 psi 22555

70 psi 22555

80 psi 25555

*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 tank’s air pressure must be adjusted to match

that pressure, but must not be higher than 80 psi.

FIGURE 32.

STRANGE SOUNDS

Possible noises due to expansion and contraction of some metal

parts during periods of heat-up and cool-down do not represent

harmful or dangerous conditions.

Operational Conditions

SMELLY WATER

In each glass-lined water heater there is installed one anode

rod (see parts section) for corrosion protection of the tank.

Certain water conditions will cause a reaction between this rod

and the water. The most common complaint associated with the

anode rod is one of a “rotten egg smell.” This odor is derived

from hydrogen sulﬁ de gas dissolved in the water. The smell is

the result of four factors which must all be present for the odor

to develop:

A. A concentration of sulfate in the supply water.

B. Little or no dissolved oxygen in the water.

C. A sulfate reducing bacteria within the water heater. (This

harmless bacteria is non-toxic to humans.)

D. An excess of active hydrogen in the tank. This is caused by

corrosion protective action of the anode.

Smelly water may be eliminated or reduced in some water heater

models by replacing the anode rod (s) with one of less active

material, and then chlorinating the water heater tank and all hot

water lines. Contact the local Sears Service Center for further

information concerning an Anode Replacement Kit #9001453

and this Chlorination Treatment. Anode replacement and

chlorination of the tank are not covered by the water heater’s

limited warranty.

If the smelly water persists after the anode replacement and

chlorination treatment; then you should consider chlorinating or

aerating your water supply.

TROUBLESHOOTING

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Kenmore 58650 User Manual Page 22

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