Sears 449.310531 Thermal Expansion, Temperature Controls, Temperature and Pressure, Relief Valve

STEPS TO INSTALL YOUR WATER HEATER (Continued)_

If the factory setting is satisfactory for your needs, replace the front panel and turn on the electric supply to the water heater.

CAUTION: BE SURE THE WATER HEATER IS COMPLETELY FULL OF WATER BEFORE TURNING ON THE ELECTRICITY

(SEE STEP 7 ON PAGE&) Be sure the cold water supply to the water heater is fully on.

If you want to set the water heater to a higher temperature,

DO NOT TURN ON THE ELECTRIC POWER. FIRST READ THE TEMPERATURE CONTROLS SECTION AND ALL WARNINGS.

WARNING

WATER TEMPERATURE OVER 125 DEGREES FAHRENHEIT CAN CAUSE BURNS OR DEATH FROM SCALDS. CHILDREN, DISABLED AND ELDERLY ARE AT HIGHER RISK OF BEING SCALDED. ALWAYS FEEL WATER BEFORE BATHING OR SHOWERING.

TEMPERATURE LIMITING VALVESWITH INSTRUCTIONS ARE AVAILABLE FROM PLUMBING SUPPLY AND HARDWARE STORES.

THERMAL EXPANSION

Water supply systems may, because of high line pressure, frequent cut-offs, the effects of water hammer and others, have installed devices such as pressure-reducing valves, check valves, back flow preventors, 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 system to be closed. As water is heated, it expands (thermal expansion) and closed systems do not allow for the expansion 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'stemperature and pressure relief valve is reached, the temperature and pressure relief valve will relieve the excess pressure. The temperature and pressure relief valve is not intended for the constant relief of thermal expansion. This is an unacceptable condition and must be corrected. Do not plug the temperature and pressure relief valve.

If the system has any devices installed which could create a closed system, install a by-pass and/or an expansion tank to relieve the pressure built by thermal expansion in the water system. Expansion tanks are available for ordering through the Sears Service Center. Contact the local water supplier

and/or Sears Service Center for assistance in controlling these situations.

TEMPERATURE CONTROLS

The upper, and lower heating elements have the same kind of temperature control thermostats. MODEL NUMBER 449.314410 HAS ONLY A LOWER HEATING ELEMENT AND CONTROL THERMOSTAT.The thermostat(s) are factory set to keep the water at approximately 120 degrees Fahrenheit. At

120 degrees Fahrenheit, water is hot enough for most household needs.

Safety and energy conservation are factors to be considered when selecting the water temperature setting of water heater's thermostat. Water temperatures above 120° E can cause severe burns or death from scalding. Be sure to read and follow the warnings outlined below.

Maximum water temperatures occur just after the elements have shut off. To find hot water temperature being delivered, turn on a hot water faucet and place a thermometer in the hot water stream and read the thermometer.

The following chart may be used as a guide in determining the proper water temperature for your home.

TIME/TEMPERATURE RELATIONSHIPSIN SCALDS

Temperature		Time to Produce Serious Burn
120° E		More than 5 minutes
125° F.		11/2to	2 minutes
130	° E	About	30 seconds
135	° F.	About	10 seconds
140° E		Less than 5 seconds
145° E		Less than 3 seconds
150° F.		About	11/2 seconds
155= F.		About	1 second

Tat_e c'c_Jrtesyof Shdner_ Burn Inst#ute

If a different setting is desired, do the following.

l_l[_

Temperature

Control

Thermostat	Temperature
	Control
	Adjustment
	Screw

TEMPERATURE AND PRESSURE	I READTHE WARNING NOTES IN STEP 9, PAGE8	I
RELIEF VALVE		I

The relief valve, located on top of the water heater, protects against dangerously excessive temperature and/or pressure buildup inside the water heater. The relief valve automatically opens, if temperature or pressure gets too high, to relieve hot water and/or pressure to the drain. SEE VALVE REQUIREMENTS ON PAGE 4, AND YEARLY CARE FOR THE VALVEON PAGE 10 AND 11.

NOTE: SOME DISHWASHERS AND/OR AUTOMATIC CLOTHES WASHERS MAY REQUIRE A TEMPERATURE SETTING HIGHER THAN 120 DEGREES FAHRENHEIT FOR SATISFACTORYOPERATION.REFERTO YOUR DISHWASHER AND/OR AUTOMATIC CLOTHES WASHER OWNERS MANUAL FOR THE REQUIREDTEMPERATURESETTING.