Kenmore 153.32646, 153.326761, 153.326561 Start Up Conditions, Thermal Expansion, Strange Sounds

Troubleshooting Guide

Start Up Conditions

THERMAL EXPANSION

Water supply systems may, because of such events as high line pressure, frequent cut-off_, 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 _roblems. When these devices are not equipped with an internal

y-pass, and no other measures are taken, the devices cause the water system to be dosed. As water is heated, it expands (ther-

mal expansion) and closed 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 reached, the

valve will relieve the excess pressure. The temperature-pressurerelief 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 closed 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.

HOT	COU_ WATER	HEATER	(3)
	- COLD	WATER	PRESSURE
	INLET	FITTING	REDUCING
			VALVEWITH
			BY-PASS
	EXPANSION
	TANK(0		1

(z)

PRESSUREGAUGE

WATER

SHUTOFF

RECOMMENDED INSTALLATION

(VERTICAL MOUNTING)

	WATER HEATER	FLOOR, CEILING
	COLD WATER	JOIST, ETC.
	INLET FITTING
HOT	COLD	STRAPPING

Thermal Expansion Tank Specifications

Model	_lhnk Capacity		Dimensions	in Inches	Pipe Fitting
Number	In Gallons		Diameter	Length	On	"Ihnk
153.331020	2		8 inches	12_ inches	74"Male
153.331050	5		11 inches	14_ inches	74"Male
Expansion	Tank	Sizing Chart
	Inlet*		Water Heater Capacity		(Gallons)
	Water
Expansion	Pressure	30	40	50	66	80
	40psi	2	2	2	5	5
_nk
Capacity	50psi	2	2	2	5	5
Needed	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 higJ.her than 40 psi, the expansmn tanks a_r pressure must be adjusted to match that

pressure, but must not he higher than 80 psi.

(3)

PRESSURE

REDUCING INLETCOLD

VALVEWITH WATER

O)BY-PASS SHUTOFF

EXPANSION

TANK

(z)_

PRESSUREGAUGE

ALTERNATE RECOMMENDED

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

armful or dangerous conditions.

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