Kenmore 153.33115 Start Up Conditions, Thermal Ex ansion 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 43.

Table 5: Thermal Ex )ansion Tank Specifications

	Tank	Dimensions			Pipe
Model	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 6: 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
Capacity	60psi	2	2	5	5	5
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

INLET FITTINGREDUCING

_LD_COLD WATERVALVEPRESSUREWITH

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 43.

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 depressurization 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 drawn toward the draft hood, shut off water heater and make necessary air supply changes to correct.

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