Kenmore 153.331492, 153.331592 Start Up Conditions, Expansion Tank Specifications, Strange Sounds

Start Up Conditions

Thermal Expansion

Property Damage Hazard

•Avoid water heater damage.

•install thermal expansion tank or device if necessary.

•Contact qualified installer or service agency.

As water is heated, it expands (thermal expansion). In a closed system, the volume of water wilt grow. As the volume of water grows, there wilt 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 for assistance in controlling these situations. See Figure 41.

TABLE 4
Thermal	Expansion	Tank Specifications
Model	Tank	Dimensions		Pipe
	Capacity	in Inches		Fitting
Number	In Gallons	Diameter	Len£1th	On Tank
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

TABLE 5

Expansion Tank Sizing Chart

Inlet* Water Heater Capacity (Gallons)

	Water
	Pressure	30	40	50	66	82
Expansion	40psi	2	2	2	5	5
Tank	50psi	2	2	2	5	5
		2	2	5	5	5
Capacity	60psi
Needed	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.

WATER HEATER	(3)
HOT	REDUCING
INLET FITTING
../ COLD WATER	PRESSURE
	VALVE WITH
	BY-PASS

(2)

PRESSURE GAUGEINLET COLD

WATER SHUT-OFF

I	RECOMMENDED	INSTALLATION
	I	MOUNTING)
	(VERTICAL
WATER HEATER
COLD WATER
INLET	FITTING	FLOOR, CEILING JOIST, ETC.
HOT	COLD
		(3)
		PRESSURE

REDUCING

VALVE WITH

(1)BY-PASS

EXPANSION /

.,I t

PRESSURE GAUGE--INLET COLD

WATER SHUT-OFF

ALTERNATE RECOMMENDED INSTALLATION

(HORIZONTAL MOUNTING)

FIGURE 41.

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.

Condensation causes sizzling and popping within the burner area during heating and cooling periods and should be considered normal. See "Condensation" section.

Draft Hood Operation

Check draft hood operation by performing a worst case depressurJzation of the building. With all doors and windows closed, and with all air handling equipment and exhaust fans operating such as furnaces, clothes dryers, range hoods and bathroom fans, a match flame should still be drawn into the draft hood of the water heater with its burner firing. If the flame is not

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