Kenmore 153.335862, L53.335816 Troubleshooting Guide, Start Up Conditions, WMale, PRESSUR gGAUG

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 excesspressure. The temperature-pressure

relief valve is not intendedfor 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)
	:=I1£ COLDWATER	PRESSURE
	bINLET FITTING	REDUCING
		VALVEWITH
		BY-PASS

"PRESSU(R gGAUG

WATER

SHUTOFF

	RECOMMENDED INSTALLATION
_,m====,m==_	(VERTICAL MOUNTING)

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

Thermal Expansion Tank Specifications

Model	Tank	C_lpacity	Dimensions	in Inches	i Pipe	Fitting
Number	In	Gallons	D ameter	. Length	On	Tank
153.331020		2	8 inches	127, inches	Vi'	Male

i531331050	5		llinches		14_inches		W'Male
							4
Expansion	Tank	Sizing	Chart
	Inlet*	Water		Heater Capacity		(Gallons)
	Water
Expansion	Pressure	30	!	40	50	66	82
		2		2	2	5	5
Tank	40psi
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 waterpressure.

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.

O)

	PRESSURE
	REDUCING INLETCOLD
	VALVEWITH	WATER
(i)	BY-PASS	SHUTOFF

EXPANSION

(21

PRESSURE GAUGE

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 po 3ping with the burner area

during heating and cooling periods and should be considered normal. See "(]ondensation" section.

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