valutazioni - 3, GPA: 4 ( )

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Because of the suddenness and amount of water, condensate water may be diagnosed as a “tank leak”. After the water in the tank warms up (about 1-2 hours), the condition should disappear. Do not assume the water heater is leaking until there has been enough time for the water in the tank to warm up. An undersized water heater will cause more condensation. The water heater must be sized properly to meet the family’s demands for hot water including dishwashers, washing machines and shower heads. Excessive condensate may be noticed during the winter and early spring months when incoming water temperatures are at their lowest. Good venting is essential for a gas fired water heater to operate properly as well as to carry away products of combustion and water vapor. SMOKE/ODOR It is not uncommon to experience a small amount of smoke and odor during the initial start-up. This is due to burning off of oil from metal parts, and will disappear in a short while. 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 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 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 release 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 corrected. It is recommended that any devices installed which could create a closed system have a by-pass and/or the system have an expansion tank or device to relieve the pressure built by thermal expansion in the water system. Expansion tanks are available through Sears stores and Sears Service Centers. Contact Sears Service Center for assistance in controlling these situations, see Figure 27. Model Tank Capacity Dimensions in Inches Pipe Fitting On Tank Number In Gallons Diameter Length 153.331020 2 8 (203 mm) 12-3/4 (323 mm) 3/4” Male 153.331050 5 11 (279 mm) 14-3/4 (375 mm) 3/4” Male Expansion Tank Sizing Chart Expansion Inlet* Water Pressure Water Heater Capacity (Gallons) 30 40 50 66 80 40psi 2 2 2 5 5 Tank 50psi 2 2 2 5 5 Capacity 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 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. FIGURE 27. 25 STRANGE SOUNDS Possible noises due to expansion and contraction of some metal parts during periods of heat-up and cool-down do not necessarily represent harmful or dangerous conditions. Condensation causes sizzling and popping within the burner area during heating and cooling periods and should be considered normal. See “Condensate” in this section. OPERATIONAL CONDITIONS SMELLY WATER In each water heater there is installed at least one anode rod (see parts section) for corrosion protection of the tank. Certain water conditions will cause a reaction between this rod and the water. The most common complaint associated with the anode rod is one of a “rotten egg smell” in the hot water. The smell is a result of four factors which must all be present for the odor to develop: a. A concentration of sulfate in the supply water. b. Little or no dissolved oxygen in the water. c. A sulfate reducing bacteria which has accumulated within the water heater (this harmless bacteria is nontoxic to humans). d. An excess of active hydrogen in the tank. This is caused by the corrosion protective action of the anode. Smelly water may be eliminated or reduced in some water heater models by replacing the anode(s) with one of less active material, and then chlorinating the water heater tank and all water lines. Contact Sears Service Center for further information concerning Anode Replacement Kit #9001453 and this chlorination treatment. Anode replacement and chlorination of the tank are not covered by the water heater’s limited warranty. If the smelly water persists after the anode replacement and chlorination treatment, we can only suggest that chlorination or aeration of the water supply be considered to eliminate the water problem. Do not remove the anode leaving the tank unprotected. By doing so, all warranty on the water heater tank is voided. “AIR” IN HOT WATER FAUCETS HYDROGEN GAS: Hydrogen gas can be produced in a hot water system that has not been used...

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