A.O. Smith WATER HEATERS - Manual

6 WIRING DIAGRAMS TURN OFF THE HEATER ELECTRICAL SUPPLY BEFORE SERVICING ANY ELECTRICAL COMPONENTS. FIGURE 2. A-9 240 VOLT “OFF PEAK” NON-SIMULTANEOUS OPERATION BOTTOM ELEMENT ON SEPARATE TIME CLOCK OR “OFF PEAK” METER C-2 TWO WIRE CIRCUIT FOR SINGLE ELEMENT HEATERS EQUIPPED WITH HIGH LIMIT CONTROL ...

7 MIXING VALVE USAGE FIGURE 3. Water (Potable) Heating: All models are considered suitable for water (potable) heating only. HOTTER WATER CAN SCALD: Water heaters are intended to produce hot water. Water heated to atemperature which will satisfy space heating, clothes washing, dishwashing, and other...

8 FACTS TO CONSIDER ABOUT THE LOCATION Carefully choose an indoor location for the new water heater, becausethe placement is a very important consideration for the safety of theoccupants in the building and for the most economical use of theappliance. Whether replacing an old water heater or putting...

9 The water within the water heater tank expands as it is heated andincreases the pressure of the water system. If the relieving point ofthe water heater’s temperature-pressure relief valve is reached, thevalve will relieve the excess pressure. The temperature-pressure relief valve is not intended f...

11 KEEPING THE THERMOSTAT SETTING AT 120°F WILL REDUCE THERISK OF SCALDS. Figure 7 shows the approximate time-to-burn relationship for normaladult skin. The thermostats on your water heater have a linearrelationship between degrees of angular rotation and the correspondingchange in temperature. Thus...

12 THERMAL EXPANSION Water supply systems may, because of such events as high linepressure, frequent cut-offs, the effects of water hammer amongothers, have installed devices such as pressure reducing valves, checkvalves, back flow preventers, etc. to control these types of problems.When these devic...

14 LEAKAGE CHECKPOINTS Read this manual first. Then before checking the water heater makesure the electrical power supply has been turned “OFF” before checkingthe tank for leakage. *A. Condensation and dripping may be seen on pipes if the water temperature is low in humid weather or pipe connections...

15 REPAIR PARTS LIST DRAIN PAN 17 1 2 16 8 11 1 4 1 4 7 1 3 6 4 2 3 9 1 0 1 5 Key No. Part Description 1 Upper Heating Element (If Dual Element Unit) 2 Lower Heating Element 3 Element Gasket 4 Lower Thermostat (If Dual Element Unit) 5 Upper Thermostat w/ECO (If Dual Element Unit) 6 Lower Thermostat ...

16 These guidelines should be utilized by a qualified service agent. TROUBLESHOOTING GUIDELINES Improperly sealed, hot or cold supply connection,relief valve or drain valve. Leakage from other appliances or water lines. Thermal expansion in closed water system. Improperly seated valve. High sulfate ...

17 RESIDENTIAL ELECTRIC WARRANTY THIS WARRANTY IS APPLICABLE TO THE ORIGINALOWNER ONLY. In accordance with the warranty termsand conditions specified below. A. O. Smith Water Heaters (the warrantor) will furnish theORIGINAL OWNER, 1) a replacement A. O. Smith waterheater of equivalent size and curre...