A.O. Smith BTN 120 THRU 400/A Series Manifold Kits, Two Unit Manifold Kit, Four Unit Manifold Kit

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MANIFOLD KITS

TWO UNIT MANIFOLD KIT

(PART NO. 78692)

MODEL	DIMENSION “A”
BTN-120	63”
BTN-154	68”
BTN-180	72”
BTN-199	72”
BTN-200/A	72”
BTN-250/A	72”
BTN-275/A	72”
BTN-310/A	73”
BTN-366/A	73”
BTN-400/A	73”

THREE UNIT MANIFOLD KIT

(PART NO. 78593)

FOUR UNIT MANIFOLD KIT

(PART NO. 78694)

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Contents MODELS BTN 120 THRU 400/A Series INSTALLATION OPERATION MAINTENANCE LIMITED WARRANTYCOMMERCIAL GAS, GLASS-LINED, TANK-TYPE WATER HEATER FRONT VIEW ROUGH-IN-DIMENSIONSTABLE 1. ROUGH-IN-DIMENSIONS TABLE 3. GASAND ELECTRICAL CHARACTERISTICSFOREWORD TABLE OF CONTENTSCHEMICAL VAPOR CORROSION GENERAL SAFETY INFORMATIONPRECAUTIONS GROUNDING INSTRUCTIONSELECTRONIC IGNITION CONTROL FEATURESHIGH ALTITUDE INSTALLATIONS HIGH LIMIT SWITCHLOCATING THE HEATER CIRCULATING PUMPDISHWASHING MACHINE REQUIREMENT UNCRATINGAIR REQUIREMENTS LEVELINGCLEARANCES HARD WATERCONFINED SPACE VENTINGMULTIPLE HEATER MANIFOLD UNCONFINED SPACETYPE B GAS VENT Multiple Gas Fired Tank-Type Heaters TABLE 6. TECHNICAL DATA VENTINGTABLE 6. TECHNICAL DATA VENTING Continued RELIEF VALVE WATER LINE CONNECTIONSWATER POTABLE HEATING AND SPACE HEATING See pages THERMOMETERS Not SuppliedDANGER INSTALLATION DIAGRAMS-TOP INLET/OUTLET USAGEGENERAL CODE RESTRICTIONSTEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROL VERTICAL STORAGE TANK AND FORCED CIRCULATIONHORIZONTAL STORAGE TANK AND FORCED CIRCULATION TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USEWITH 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 HEATER WITH MIXING VALVE AND RECIRCULATED SANITIZING LOOP ONE OR TWO TEMPERATURE - ONE HEATERS,HIGH TEMPERATURESTORAGE WITH OR WITHOUT RECIRCULATION HEATER WITH OR WITHOUT MIXING VALVETWO PRE-HEATERS WITH BOOSTER HEATER TWO TEMPERATURE - TWO PRE-HEATERS WITH MIXING VALVE OR BOOSTERHEATER WITH OR WITHOUT BUILING RECIRCULATION TWO PRE-HEATERS WITH MIXING VALVEHORIZONTAL STORAGE TANK MEDIUM TEMPERATURE - ONE HEATER WITH AUXILIARY STORAGE TANK FORCEDCIRCULATION WITH OR WITHOUT BUILDING RECIRCULATION VERTICAL STORAGE TANKFOUR UNIT MANIFOLD KIT MANIFOLD KITSTWO UNIT MANIFOLD KIT THREE UNIT MANIFOLD KITFIGURE 9 - SINGLE UNIT WIRING DIAGRAM BTN-120 THROUGH 400A HEATER WIRINGCUBIC FEET PER HOUR GAS PIPINGGAS PRESSURE REGULATOR TABLE 7 - GAS SUPPLY LINE SIZES IN INCHES MAXIMUM CAPACITY OF PIPE IN1 CU. FT. OF GAS AT FULL CAPACITY OPERATIONMANIFOLD GAS PRESSURE IN INCHES OF WATER COLUMN ALL MODELS APPROXIMATE TIME REQUIRED TO CONSUMESEQUENCE OF OPERATION LIGHTING AND OPERATION INSTRUCTIONS FOR YOUR SAFETY READ BEFORE OPERATINGOPERATING INSTRUCTIONS WATER TEMPERATURE CONTROL PREVENTIVE MAINTENANCECHECK THE IGNITOR ASSEMBLY IGNITOR ASSEMBLYFIGURE 11, IGNITOR MAIN BURNERGAS VALVES CHECKING THE INPUTANODE ROD INSPECTION VENTING SYSTEMREMOTE STORAGE TANK TEMPERATURE CONTROL HOT WATER ODORDELIMING USING FLO-JUG METHOD RECOMMENDED PROCEDURE FORTANK CLEANOUT PROCEDURE DELIMING SOLVENTSELECTRICAL SERVICING SERVICESYSTEM DIAGNOSTICS IGNITION MODULE SYSTEMSEQUENCE OF OPERATION FLOW CHART REPLACEMENT PARTS, SERVICE HANDBOOKS AND TRAINING AIDSREPLACEMENT PARTS COMPLAINT OPERATIONAL CHECKLISTSERVICEMAN REMEDYKEEPTHISWARRANTYPOSTEDADJACENTTOTHEHEATERFORFUTUREREFERENCE Model BTN Limited Warranty4. SERVICEANDREPAIREXPENSES 6. CLAIMPROCEDURE