Kenmore 153.337002 Troubleshooting Guide, Start Up Conditions, Thermal Expansion, Sizing Chart

Troubleshooting Guide

Start Up Conditions

THERMAL EXPANSION

Water supply systems may, because of high line pressure, fre- quent cut-offs, the effects of water hammer and 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 sys- tem to be closed. As water is heated, it expands (thermal expan- sion) and closed systems do not allow for the expansion of heat- ed 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 tempera-

ture-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 expan- sion tank to relieve the pr_sure built by thermal expansion in

the water system. Expansion tanks are available for ordering through the Sears Service Center. Contact the local plumbing inspector, water supplier, and/or the Sears Service Center for assistance in controlling these situations.

HOTCOLD WATERHEATER(3)

COLDWATERPRESSURE

INLETFITTINGREDUCING VALVEWITH

By.PASS

EXPANSION

TANK(01

(z)

PRESSURE GAUGE

WATER

SHUTOFF

RECOMMENDED INSTALLATION

(VERTICAL MOUNTING)

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

Thermal Expansion Tank Specifications

Model	Tank	Capacity	Dimensions	in	Inches	.! Pipe	Fitting
Number	In	Gallons	Dia_meter	1 Length		] On	Tank
153.331050		5	11 inches	_14_	inches/	_"	Male

Expansion		Tank	Sizing Chart
Ex pans -onI Inlet*			]	Water	Heater		Capacity		[
Tank	Water		[		(Gallons)				I
Capacity	I Pressure		_73			__	82	[_ 100	I
Needed	/4_psi		5	I	5	_	5	I 5	I
*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.

(3)

	PRESSURE
	REDUCING INLET COLE
VALVEWITH		WATER
(0	BY-PASS	SHUTOFF
EXPANSION		1
	(_)
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.

Condensation causes sizzling and popping with the burner area

during heating and coolin,_ periods and should be considered

normal. See Condensation section.

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