A.O. Smith BTN 120 THRU 400/A Series Two Temperature - One Heater High Temperature Storage

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TWO TEMPERATURE - ONE HEATER HIGH TEMPERATURE STORAGE

TWO TEMPERATURE - ONE HEATER HIGH TEMPERATURE STORAGE

WITH RECIRCULATION OF SANITIZING LOOP

NOTE 1: TOGGLE SWITCH CONTROLS 180°F (82°C) WATER CIRCULATION. INSTALL ON OR CLOSE TO DISHWASHING MACHINE. TOGGLE SWITCH MUST BE CLOSED (ON) DURING THE RINSE OPERATIONAND OPEN (OFF) WHEN DISHWASHER IS NOT OPERATING OR WHEN ON LONG STANDBY.

NOTE 2: INSTALLLINE TEMPERATURE CONTROL INAN UNINSULATED TEE BEYOND THE DISHWASHING MACHINE TAKEOFF IN THE SANITIZING LOOP. CONTROL SHOULD BE SET AT 185°F (85°C).

NOTE 3: ADJUST PLUG COCK SO THE SANITIZING LOOP FLOW RATE DOESNOTCAUSEUNNECESSARYTURBULENCEINTHETANK.

*TEMPERED WATER LOOP, IF USED, CONNECTTO POINT “A”.

**PIPE RELIEF VALVE TO OPEN DRAIN.

INSTALLIN ACCORDANCE WITH LOCAL CODES.

CAUTION: IF BUILDING COLD WATER SUPPLY HAS A BACKFLOW PREVENTER, CHECK VALVE OR WATER METER WITH CHECK VALVE. PROVISIONS FOR THERMAL EXPANSION OF WATER

IN THE HOTWATER SYSTEM MUST BE PROVIDED.

WITH RECIRCULATION OF SANITIZING LOOP DANGER

TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ON PAGE 25. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARYTO OBTAIN ADEQUATE BOOSTER OUTPUT, ADDANANTI- SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES.

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Contents COMMERCIAL GAS, GLASS-LINED, TANK-TYPE WATER HEATER INSTALLATION OPERATION MAINTENANCE LIMITED WARRANTYMODELS BTN 120 THRU 400/A Series TABLE 3. GASAND ELECTRICAL CHARACTERISTICS ROUGH-IN-DIMENSIONSTABLE 1. ROUGH-IN-DIMENSIONS FRONT VIEWTABLE OF CONTENTS FOREWORDGROUNDING INSTRUCTIONS GENERAL SAFETY INFORMATIONPRECAUTIONS CHEMICAL VAPOR CORROSIONHIGH LIMIT SWITCH FEATURESHIGH ALTITUDE INSTALLATIONS ELECTRONIC IGNITION CONTROLUNCRATING CIRCULATING PUMPDISHWASHING MACHINE REQUIREMENT LOCATING THE HEATERHARD WATER LEVELINGCLEARANCES AIR REQUIREMENTSUNCONFINED SPACE VENTINGMULTIPLE HEATER MANIFOLD CONFINED SPACETABLE 6. TECHNICAL DATA VENTING TYPE B GAS VENT Multiple Gas Fired Tank-Type HeatersTABLE 6. TECHNICAL DATA VENTING Continued THERMOMETERS Not Supplied WATER LINE CONNECTIONSWATER POTABLE HEATING AND SPACE HEATING See pages RELIEF VALVECODE RESTRICTIONS INSTALLATION DIAGRAMS-TOP INLET/OUTLET USAGEGENERAL DANGERTEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE VERTICAL STORAGE TANK AND FORCED CIRCULATIONHORIZONTAL STORAGE TANK AND FORCED CIRCULATION TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROLTWO TEMPERATURE - ONE HEATER HIGH TEMPERATURE STORAGE WITH RECIRCULATION OF SANITIZING LOOPWITH OR WITHOUT BUILDING RECIRCULATION INSTALLATION DIAGRAMS-SIDE INLET/OUTLET USAGETWO TEMPERATURE - TWO HEATERS, ONE PRE-HEATER/ONE - BOOSTER HEATER HEATER WITH OR WITHOUT MIXING VALVE ONE OR TWO TEMPERATURE - ONE HEATERS,HIGH TEMPERATURESTORAGE WITH OR WITHOUT RECIRCULATION HEATER WITH MIXING VALVE AND RECIRCULATED SANITIZING LOOPTWO PRE-HEATERS WITH MIXING VALVE TWO TEMPERATURE - TWO PRE-HEATERS WITH MIXING VALVE OR BOOSTERHEATER WITH OR WITHOUT BUILING RECIRCULATION TWO PRE-HEATERS WITH BOOSTER HEATERVERTICAL STORAGE TANK MEDIUM TEMPERATURE - ONE HEATER WITH AUXILIARY STORAGE TANK FORCEDCIRCULATION WITH OR WITHOUT BUILDING RECIRCULATION HORIZONTAL STORAGE TANKTHREE UNIT MANIFOLD KIT MANIFOLD KITSTWO UNIT MANIFOLD KIT FOUR UNIT MANIFOLD KITHEATER WIRING FIGURE 9 - SINGLE UNIT WIRING DIAGRAM BTN-120 THROUGH 400ATABLE 7 - GAS SUPPLY LINE SIZES IN INCHES MAXIMUM CAPACITY OF PIPE IN GAS PIPINGGAS PRESSURE REGULATOR CUBIC FEET PER HOURAPPROXIMATE TIME REQUIRED TO CONSUME OPERATIONMANIFOLD GAS PRESSURE IN INCHES OF WATER COLUMN ALL MODELS 1 CU. FT. OF GAS AT FULL CAPACITYSEQUENCE OF OPERATION OPERATING INSTRUCTIONS FOR YOUR SAFETY READ BEFORE OPERATINGLIGHTING AND OPERATION INSTRUCTIONS IGNITOR ASSEMBLY PREVENTIVE MAINTENANCECHECK THE IGNITOR ASSEMBLY WATER TEMPERATURE CONTROLCHECKING THE INPUT MAIN BURNERGAS VALVES FIGURE 11, IGNITORHOT WATER ODOR VENTING SYSTEMREMOTE STORAGE TANK TEMPERATURE CONTROL ANODE ROD INSPECTIONDELIMING SOLVENTS RECOMMENDED PROCEDURE FORTANK CLEANOUT PROCEDURE DELIMING USING FLO-JUG METHODIGNITION MODULE SYSTEM SERVICESYSTEM DIAGNOSTICS ELECTRICAL SERVICINGREPLACEMENT PARTS REPLACEMENT PARTS, SERVICE HANDBOOKS AND TRAINING AIDSSEQUENCE OF OPERATION FLOW CHART REMEDY OPERATIONAL CHECKLISTSERVICEMAN COMPLAINT6. CLAIMPROCEDURE Model BTN Limited Warranty4. SERVICEANDREPAIREXPENSES KEEPTHISWARRANTYPOSTEDADJACENTTOTHEHEATERFORFUTUREREFERENCE
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