A.O. Smith BTN 120 THRU 400/A Series General Safety Information, Precautions, Improper Combustion

Contents MODELS BTN 120 THRU 400/A Series INSTALLATION OPERATION MAINTENANCE LIMITED WARRANTYCOMMERCIAL GAS, GLASS-LINED, TANK-TYPE WATER HEATER ROUGH-IN-DIMENSIONS TABLE 1. ROUGH-IN-DIMENSIONSTABLE 3. GASAND ELECTRICAL CHARACTERISTICS FRONT VIEWTABLE OF CONTENTS FOREWORDGENERAL SAFETY INFORMATION PRECAUTIONSGROUNDING INSTRUCTIONS CHEMICAL VAPOR CORROSIONFEATURES HIGH ALTITUDE INSTALLATIONSHIGH LIMIT SWITCH ELECTRONIC IGNITION CONTROLCIRCULATING PUMP DISHWASHING MACHINE REQUIREMENTUNCRATING LOCATING THE HEATERLEVELING CLEARANCESHARD WATER AIR REQUIREMENTSVENTING MULTIPLE HEATER MANIFOLDUNCONFINED SPACE CONFINED SPACETABLE 6. TECHNICAL DATA VENTING TYPE B GAS VENT Multiple Gas Fired Tank-Type HeatersTABLE 6. TECHNICAL DATA VENTING Continued WATER LINE CONNECTIONS WATER POTABLE HEATING AND SPACE HEATING See pagesTHERMOMETERS Not Supplied RELIEF VALVEINSTALLATION DIAGRAMS-TOP INLET/OUTLET USAGE GENERALCODE RESTRICTIONS DANGERVERTICAL STORAGE TANK AND FORCED CIRCULATION HORIZONTAL STORAGE TANK AND FORCED CIRCULATIONTEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROLTWO TEMPERATURE - ONE HEATER HIGH TEMPERATURE STORAGE WITH RECIRCULATION OF SANITIZING LOOPTWO TEMPERATURE - TWO HEATERS, ONE PRE-HEATER/ONE - BOOSTER HEATER INSTALLATION DIAGRAMS-SIDE INLET/OUTLET USAGEWITH OR WITHOUT BUILDING RECIRCULATION ONE OR TWO TEMPERATURE - ONE HEATERS,HIGH TEMPERATURE STORAGE WITH OR WITHOUT RECIRCULATIONHEATER WITH OR WITHOUT MIXING VALVE HEATER WITH MIXING VALVE AND RECIRCULATED SANITIZING LOOPTWO TEMPERATURE - TWO PRE-HEATERS WITH MIXING VALVE OR BOOSTER HEATER WITH OR WITHOUT BUILING RECIRCULATIONTWO PRE-HEATERS WITH MIXING VALVE TWO PRE-HEATERS WITH BOOSTER HEATERMEDIUM TEMPERATURE - ONE HEATER WITH AUXILIARY STORAGE TANK FORCED CIRCULATION WITH OR WITHOUT BUILDING RECIRCULATIONVERTICAL STORAGE TANK HORIZONTAL STORAGE TANKMANIFOLD KITS TWO UNIT MANIFOLD KITTHREE UNIT MANIFOLD KIT FOUR UNIT MANIFOLD KITHEATER WIRING FIGURE 9 - SINGLE UNIT WIRING DIAGRAM BTN-120 THROUGH 400AGAS PIPING GAS PRESSURE REGULATORTABLE 7 - GAS SUPPLY LINE SIZES IN INCHES MAXIMUM CAPACITY OF PIPE IN CUBIC FEET PER HOUROPERATION MANIFOLD GAS PRESSURE IN INCHES OF WATER COLUMN ALL MODELSAPPROXIMATE 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 PREVENTIVE MAINTENANCE CHECK THE IGNITOR ASSEMBLYIGNITOR ASSEMBLY WATER TEMPERATURE CONTROLMAIN BURNER GAS VALVESCHECKING THE INPUT FIGURE 11, IGNITORVENTING SYSTEM REMOTE STORAGE TANK TEMPERATURE CONTROLHOT WATER ODOR ANODE ROD INSPECTIONRECOMMENDED PROCEDURE FOR TANK CLEANOUT PROCEDUREDELIMING SOLVENTS DELIMING USING FLO-JUG METHODSERVICE SYSTEM DIAGNOSTICSIGNITION MODULE SYSTEM ELECTRICAL SERVICINGSEQUENCE OF OPERATION FLOW CHART REPLACEMENT PARTS, SERVICE HANDBOOKS AND TRAINING AIDSREPLACEMENT PARTS OPERATIONAL CHECKLIST SERVICEMANREMEDY COMPLAINTModel BTN Limited Warranty 4. SERVICEANDREPAIREXPENSES6. CLAIMPROCEDURE KEEPTHISWARRANTYPOSTEDADJACENTTOTHEHEATERFORFUTUREREFERENCE