Kenmore 153.31702 Troubleshooting Guide, Start Conditions, Thermal Expansion, Strange Sounds

Troubleshooting							Guide
Start		Up	Conditions
THERMAL		EXPANSION					HOT	COLD WATER HEATER	(3)
Water supply systems may, because of such events as high line								COLD WATER	PRESSURE
								, INLET FITTING	REDUCING
pressure,	frequent		cut-off_, the	effects of water		hammer	among
									VALVEWITH
others, have		installed devices		such	as pressure	reducing	valves,		BY-PASS
check valves,		back	flow preventers,		etc._to control these		types of	O)
_roblems.	When		these devices are not equipped			with an	internal
y-pass, and no other measures are taken, the devices cause the								EXPANSION
								TANK

water system to be dosed. As water is heated, it expands (ther-

mal expansion) and dosed 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.

(z)

PRESSUREGAUGE

WATER

SHUTOFF

RECOMMENDED INSTALLATION

(VERTICAL MOUNTING)

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.

Thermal Expansion Tank Specifications

Model	"I_tnkCapacity		Dimensions		in Inches	] Pipe Fitting
Number	In Gallons		Diameter	[	Length	[	On	"lhnk
153.331020	2		8 inches	]12_ inches]			_"	Male
Expansion	Tank	Sizing	Chart
Expansion	Inlet*	Water Heater			Capacity	(Gallons)
_Ihnk	Water
Capacity	Pressure	2	4		6	10		19.9
Needed	40-80psi	2	2		2	2		2

*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	FLOOR,CEILING
	COLD WATER	JOIST,ETC.
	INLET FITTING
MOT	COLD	STRAPPING

		0)
		PRESSURE
		REDUCING	INLET COLD
	VALVEWITH		WATER
	(0	BY-PASS	SHUTOFF
	EXPANSION
	TANK
		(2)
	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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