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Hersteller: Bradford-White Corp Dateigröße: 248.29 kb Dateiname: 96f331ff-9840-46cd-b523-8f4fa00f54c2.pdf Unterrichtssprache:

Occasionally water softener companies recommend removal of heater anodes for odor reasons. CAUTION Unauthorized removal of heater anode will void the warranty. Replace the anode as necessary to maintain corrosion protection. For further information contact your dealer. WINTER PROTECTION In regions where freezing weather is encountered, all water must be drained from unit and piping when out of service (water shut off). Drain valve must be left open until unit is returned to service. REPLACEMENT PARTS Replacement parts may be ordered through A. O. Smith dealers, authorized servicers or distributors. Refer to the Yellow Pages for where to call or contact the A. O. Smith Water Products Company, 5621 West 115th Street, Alsip, Illinois 60803, 1-800-433-2545. In Canada contact A.O. Smith Enterprises Ltd., P.O. Box, 310-768 Erie Street, Stratford, Ontario N5A 6T3, 1-800-265-8520. When ordering parts, be sure to state the quantity, part number and description of the item including the complete model and serial number as it appears on the product. Refer to the parts list for more information. PREVENTIVE MAINTENANCE RECOMMENDED PROCEDURE FOR PERIODIC REMOVAL OF LIME DEPOSITS FROM TANK TYPE COMMERCIAL WATER HEATERS FIGURE 8 The amount of calcium carbonate (lime) released from water is in direct proportion to water temperature and usage, see chart. The higher the water temperature or water usage, the more lime deposits are dropped out of the water. This is the lime scale which forms in pipes, heaters and on cooking utensils. Lime accumulation not only reduces the life of the equipment but also reduces efficiency of the heater and increases fuel consumption. The usage of water softening equipment greatly reduces the hardness of the water. However, this equipment does not always remove all of the hardness (lime). For this reason it is recommended that a regular schedule for deliming be maintained. The time between cleaning will vary from weeks to months depending upon water conditions and usage. Refer to A. O. Smith booklet, Form No. 4800, entitled “Why? When and How” for detailed description on tank inspection and cleanout. UN•LIME® and the booklet may be obtained through your A. O. Smith dealer or distributor. DELIMING SOLVENTS A. O. Smith recommends the use of UN•LIME for deliming. UN•LIME is a patented food grade acid which is safe to handle and does not create the harmful fumes which are associated with other products. UN•LIME may be obtained from your dealer, distributor or the A. O. Smith Product Service Division. Order part no. 4763 (1 gal), packed 4 gallons per case or part no. 4813 (5 gallon container). Hydrochloric base acids are not recommended for use on glass-lined tanks. CAUTION Observe handling instructions on label of product being used. 13 TANK CLEANOUT PROCEDURE Figure 9 illustrates most of the following steps. The following practices will ensure longer life and enable the unit to operate at its designed efficiency: 1. Once a month the heater should be flushed. Open the drain valve and allow two gallons of water to drain from the heater. Inlet water valve should remain open to maintain pressure in tank. 2. A cleanout opening is provided for periodic cleaning of the tank. Gas must be shut off and heater drained before opening cleanout. To clean heater through cleanout opening, proceed as follows: 1. Drain heater. 2. Remove outer cover plate from lower side of heater jacket. 3. Remove six (6) hex head screws securing tank cleanout plate and remove plate. 4. Remove lime, scale, or sediment using care not to damage the glass lining. 5. Inspect cleanout plate gasket, if new gasket is required, replace with A. O. Smith part no. 99038. 6. Install cleanout plate. Be sure to draw plate up tight by tightening screws securely. 7. Replace outer jacket cover plate. In some water areas the sediment might not be removed by this method and may result in the water heater making rumbling or boiling noises. To dissolve and remove these more stubborn mineral deposits, A. O. Smith UN•LIME Professional Delimer should be used. FIGURE 9 FLO-JUG METHOD OF DELIMING The Flo-Jug is the standard 5 gallon container for UN•LIME -or- it is available as a deliming kit with hose and fittings. Contact your dealer, distributor or the A. O. Smith Water Products Company. 1. The heater should be prepared for deliming as described in the “Why? When and How” booklet. The relief valve may also be delimed at this time. 2. With the Flo-Jug upright: • Take off cap, remove cover under opening and install 3/4" x 4" pipe nipple. • Drill or punch a 3/16" vent hole in handle. A stainless steel screw is included with the Flo-Jug kit. This screw is to be installed in the vent hole when Flo-Jug is not in use. • Remove drain valve from heater and insert a 3/4" x 4" nipple. • Connect and clamp 1" I.D. x 3" hose to Flo-Jug and heater nipple. 3. Lift the Flo-Jug to the POUR POSITION and permit the UN•LIME to flow into the heater as rapidly as possible. • Be ...

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