Kenmore 153 Bedienungsanleitung PDF herunterladen (Seite 23)

start Up Conditions

THERMAL EXPANSION

CAUTION

Property Damage Hazard

■ Avoid water heater damage.

' Install thermal expansion tank or device if necessary.

' Contact qualified installer or service agency.

Water supply systems may, because of such events as high

line pressure, frequent cut-offs, the effects of water hammer

among others, have installed devices such as pressure

reducing valves, check valves, back flow preventers, etc...to

control these types of problems. When these devices are not

equipped with an internal by-pass, and no other measures are

taken, the devices cause the water system to be closed. As

water is heated, it expands (thermal expansion) and closed

systems do not allow for the expansion 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

reached, 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 corrected.

It is recommended that any devices installed which could create

a closed system have a by-pass and/or the system have an

expansion tank to relieve the pressure built by thermal

expansion in the water system. 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

Tank

Capacity

In Gallons

Dimensions

in Inches

Pipe

Fitting

On TankDiameter Length

153.331020 2 8 (203 mm) 12-3/4 (323 mm) 3/4” Male

153.331050 5 11 (279 mm) 14-3/4 (375 mm) 3/4” Male

Expansion Tank Sizing Chart

Expansion

Tank

Capacity

Needed

Inlet*

Water

Pressure

Water Heater Capacity (Gallons)

30 40 50 66 82

40psi 2 2 2 5 5

50psi 2 2 2 5 5

60psi 2 2 5 5 5

70psi 2 2 5 5 5

80psi 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 tank’s air pressure must be adjusted to match

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

HOT COLD_

WATER HEATER

' COLD WATER

INLET FITTING

INLET COLD

WATER SHUT-OFF

RECOMMENDED INSTALLATION

(VERTICAL MOUNTING)

WATER HEATER

COLD WATER

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___________________

SMELLYWATER

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 sulfide 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.)

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