A.O. Smith BTN 120 THRU 400/A Series warranty Installation Operation Maintenance Limited Warranty

Contents MODELS BTN 120 THRU 400/A Series INSTALLATION OPERATION MAINTENANCE LIMITED WARRANTYCOMMERCIAL GAS, GLASS-LINED, TANK-TYPE WATER HEATER TABLE 1. ROUGH-IN-DIMENSIONS ROUGH-IN-DIMENSIONSTABLE 3. GASAND ELECTRICAL CHARACTERISTICS FRONT VIEWFOREWORD TABLE OF CONTENTSPRECAUTIONS GENERAL SAFETY INFORMATIONGROUNDING INSTRUCTIONS CHEMICAL VAPOR CORROSIONHIGH ALTITUDE INSTALLATIONS FEATURESHIGH LIMIT SWITCH ELECTRONIC IGNITION CONTROLDISHWASHING MACHINE REQUIREMENT CIRCULATING PUMPUNCRATING LOCATING THE HEATERCLEARANCES LEVELINGHARD WATER AIR REQUIREMENTSMULTIPLE HEATER MANIFOLD VENTINGUNCONFINED SPACE CONFINED SPACETYPE B GAS VENT Multiple Gas Fired Tank-Type Heaters TABLE 6. TECHNICAL DATA VENTINGTABLE 6. TECHNICAL DATA VENTING Continued WATER POTABLE HEATING AND SPACE HEATING See pages WATER LINE CONNECTIONSTHERMOMETERS Not Supplied RELIEF VALVEGENERAL INSTALLATION DIAGRAMS-TOP INLET/OUTLET USAGECODE RESTRICTIONS DANGERHORIZONTAL STORAGE TANK AND FORCED CIRCULATION VERTICAL STORAGE TANK AND FORCED CIRCULATIONTEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROLWITH RECIRCULATION OF SANITIZING LOOP TWO TEMPERATURE - ONE HEATER HIGH TEMPERATURE STORAGETWO TEMPERATURE - TWO HEATERS, ONE PRE-HEATER/ONE - BOOSTER HEATER INSTALLATION DIAGRAMS-SIDE INLET/OUTLET USAGEWITH OR WITHOUT BUILDING RECIRCULATION STORAGE WITH OR WITHOUT RECIRCULATION ONE OR TWO TEMPERATURE - ONE HEATERS,HIGH TEMPERATUREHEATER WITH OR WITHOUT MIXING VALVE HEATER WITH MIXING VALVE AND RECIRCULATED SANITIZING LOOPHEATER WITH OR WITHOUT BUILING RECIRCULATION TWO TEMPERATURE - TWO PRE-HEATERS WITH MIXING VALVE OR BOOSTERTWO PRE-HEATERS WITH MIXING VALVE TWO PRE-HEATERS WITH BOOSTER HEATERCIRCULATION WITH OR WITHOUT BUILDING RECIRCULATION MEDIUM TEMPERATURE - ONE HEATER WITH AUXILIARY STORAGE TANK FORCEDVERTICAL STORAGE TANK HORIZONTAL STORAGE TANKTWO UNIT MANIFOLD KIT MANIFOLD KITSTHREE UNIT MANIFOLD KIT FOUR UNIT MANIFOLD KITFIGURE 9 - SINGLE UNIT WIRING DIAGRAM BTN-120 THROUGH 400A HEATER WIRINGGAS PRESSURE REGULATOR GAS PIPINGTABLE 7 - GAS SUPPLY LINE SIZES IN INCHES MAXIMUM CAPACITY OF PIPE IN CUBIC FEET PER HOURMANIFOLD GAS PRESSURE IN INCHES OF WATER COLUMN ALL MODELS OPERATIONAPPROXIMATE TIME REQUIRED TO CONSUME 1 CU. FT. OF GAS AT FULL CAPACITYSEQUENCE OF OPERATION LIGHTING AND OPERATION INSTRUCTIONS FOR YOUR SAFETY READ BEFORE OPERATINGOPERATING INSTRUCTIONS CHECK THE IGNITOR ASSEMBLY PREVENTIVE MAINTENANCEIGNITOR ASSEMBLY WATER TEMPERATURE CONTROLGAS VALVES MAIN BURNERCHECKING THE INPUT FIGURE 11, IGNITORREMOTE STORAGE TANK TEMPERATURE CONTROL VENTING SYSTEMHOT WATER ODOR ANODE ROD INSPECTIONTANK CLEANOUT PROCEDURE RECOMMENDED PROCEDURE FORDELIMING SOLVENTS DELIMING USING FLO-JUG METHODSYSTEM DIAGNOSTICS SERVICEIGNITION MODULE SYSTEM ELECTRICAL SERVICINGSEQUENCE OF OPERATION FLOW CHART REPLACEMENT PARTS, SERVICE HANDBOOKS AND TRAINING AIDSREPLACEMENT PARTS SERVICEMAN OPERATIONAL CHECKLISTREMEDY COMPLAINT4. SERVICEANDREPAIREXPENSES Model BTN Limited Warranty6. CLAIMPROCEDURE KEEPTHISWARRANTYPOSTEDADJACENTTOTHEHEATERFORFUTUREREFERENCE