Kenmore 153.327563 Troubleshooting Guide, Start Up Conditions, Thermal Expansion, Expansion Tank

Troubleshooting Guide

Start Up Conditions

THERMAL EXPANSION

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 _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 closed. 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-pressure relief 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	COLD WATERHEATER	(3)
	• COLDWATER	PRESSURE
	,INLETFITTING	REDUCING
		VALVEWITH
		BY-PASS
	EXPANSION
	TANK	1
	O)
	(2)

PRESSUREGAUGE

WATER

SHUTOFF

RECOMMENDED INSTALLATION

(VERTICAL MOUNTING)

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

Thermal Expansion Tank Specifications

Model	Tank	Capacity	Dimensions	in	Inches	Pipe	Fitting
Number	In	Gallons	Diameter	Length		On	Tank
153.331020		2	8 inches	12_	inches	_"	Male
153.331050		5	11 inches	14_	inches	3/,,, Male

Expansion Tank		Sizing	Chart
	Inlet*	Water		Heater	Capacity	(Gallons)
	Water
Expansion	Pressure	30		40	50	66	82
	40psi	2	i	2	2	5	5
Tank
Capacity	50psi	2		_	2	5	5
Needed	60psi	2_--_			5	5	5
	70psi			2 _			5
		2			5	5
	80psi	21		7T5		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 i,nlet water pressure is higher than 40 psi, the

expansion tanks air pressure must be adjusted to match that pressure, but must not be higher than 80 psi.

o)

PRESSURE

REDUCING INLET COLD

VALVEWITH WATER

O)B'_PASS SHUTOFF

EXPANSION

(2)

PRESSUREGAUGE

ALTERNATE RECOMMENDED

INSTALLATION

(HORIZONTAL MOUNTING)

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.

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