A.O. Smith BTN 120 THRU 400/A Series Circulating Pump, Dishwashing Machine Requirement, Uncrating

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CIRCULATING PUMP

The exhaust inducer is equipped with a gravity controlled damper to reduce the amount of heat loss through the flue, improving efficiency.

EXHAUST INDUCER

FIGURE4

CIRCULATING PUMP

A circulating pump is used when a system requires a circulating loop or there is a storage tank used in conjunction with the heater. Refer to the piping diagrams in this manual for electrical hookup information and install in accordance with the latest version of the National Electric Code ANSI/NFPA No. 70.

Only all bronze circulators are used with commercial water heaters.

Although circulators are oiled and operated by the manufacturer some circulators must be oiled again before operating. Please refer to manufacturer’s instructions.

DISHWASHING MACHINE REQUIREMENT

These appliances meet the National Sanitation Foundation Standard for sanitary installations when used with the following leg kit, Part No. 6570-7.

All dishwashing machines meeting the National Sanitation Foundation requirements are designed to operate with water flow pressures between 15 and 25 psi. Flow pressures above 25 psi, or below 15 psi, will result in improperly sanitized dishes. Where pressures are high, a water pressure reducing or flow regulating control valve should be used in 1800F line to the dishwashing machine, and should be adjusted to deliver water between these limits.

The National Sanitation Foundation also recommends circulation of 1800F water. Where this is done, the circulation should be very gentle so that it does not cause any unnecessary turbulence inside the water heater. The circulation should be just enough to provide 1800F water at the point of take-off to the dishwashing machine. Adjust flow by means of the plug cock in the circulating line.

INSTALLATION INSTRUCTIONS

REQUIRED ABILITY

INSTALLATION OR SERVICE OF THIS WATER HEATER REQUIRES ABILITY EQUIVALENT TO THAT OF A LICENSED TRADESMAN IN THE FIELD INVOLVED. PLUMBING, AIR

SUPPLY, VENTING, GAS SUPPLYAND ELECTRICAL WORKARE REQUIRED.

DISHWASHING MACHINE REQUIREMENT WARNING

FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN SERIOUS PERSONAL INJURY OR DEATH.

UNCRATING

The heater is shipped with the inducer already installed. The wiring conduit runs from the thermostat to the inducer. Before turning unit on, check to make sure the wiring conduit is securely plugged into the inducer.

LOCATING THE HEATER

When installing the heater, consideration must be given to proper location. Location selected should be as close to the stack or chimney as practicable, with adequate air supply and as centralized with the piping system as possible.

INSTALLATION INSTRUCTIONS WARNING

THERE IS A RISK IN USING FUEL BURNING APPLIANCES SUCH AS GAS WATER HEATERS IN ROOMS, GARAGES OR OTHER AREAS WHERE GASOLINE, OTHER FLAMMABLE LIQUIDS OR ENGINE DRIVEN EQUIPMENT OR VEHICLES ARE STORED, OPERATED OR REPAIRED. FLAMMABLE VAPORS ARE HEAVY AND TRAVEL ALONG THE FLOOR AND MAY BE IGNITED BY THE HEATER’S PILOT OR MAIN BURNER FLAMES CAUSING FIRE OR EXPLOSION. SOME LOCAL CODES PERMIT OPERATION OF GAS APPLIANCES IN SUCH AREAS IF THEY ARE INSTALLED 18” OR MORE ABOVE THE FLOOR. THIS MAY REDUCE THE RISK IF LOCATION IN SUCH AN AREA CANNOT BE AVOIDED.

DO NOT INSTALL THIS WATER HEATER DIRECTLY ON A CARPETED FLOOR. A FIRE HAZARD MAY RESULT. Instead the water heater must be placed on a metal or wood panel extending beyond the full width and depth by at least 3 inches in any direction. If the heater is installed in a carpeted alcove, the entire floor shall be covered by the panel. Also, see the DRAINING requirements in MAINTENANCE Section.

THE HEATER SHALL BE LOCATED OR PROTECTED SO IT IS NOT SUBJECT TO PHYSICAL DAMAGE BY A MOVING VEHICLE.

REQUIRED ABILITY WARNING

FLAMMABLE ITEMS, PRESSURIZED CONTAINERS OR ANY OTHER POTENTIAL FIRE HAZARDOUS ARTICLES MUST NEVER BE PLACED ON ORADJACENT TO THE HEATER. OPEN CONTAINERS OR FLAMMABLE MATERIAL SHOULD NOT BE STORED OR USED IN THE SAME ROOM WITH THE HEATER.

THE HEATER MUST NOT BE LOCATED IN AN AREA WHERE IT WILL BE SUBJECT TO FREEZING.

LOCATE IT NEAR A FLOOR DRAIN. THE HEATER SHOULD BE LOCATED IN AN AREA WHERE LEAKAGE FROM THE HEATER OR CONNECTIONS WILL NOT RESULT IN DAMAGE TO THE ADJACENT AREA OR TO LOWER FLOORS OF THE STRUCTURE.

WHEN SUCH LOCATIONS CANNOT BE AVOIDED, A SUITABLE DRAIN PAN SHOULD BE INSTALLED UNDER THE HEATER. Such pans should be fabricated with sides at least 2" deep, with

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Contents INSTALLATION OPERATION MAINTENANCE LIMITED WARRANTY MODELS BTN 120 THRU 400/A SeriesCOMMERCIAL GAS, GLASS-LINED, TANK-TYPE WATER HEATER 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 LOOPINSTALLATION DIAGRAMS-SIDE INLET/OUTLET USAGE TWO TEMPERATURE - TWO HEATERS, ONE PRE-HEATER/ONE - BOOSTER HEATERWITH OR WITHOUT BUILDING RECIRCULATION 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 FOR YOUR SAFETY READ BEFORE OPERATING LIGHTING AND OPERATION INSTRUCTIONSOPERATING 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, SERVICE HANDBOOKS AND TRAINING AIDS SEQUENCE OF OPERATION FLOW CHARTREPLACEMENT PARTS REMEDY OPERATIONAL CHECKLISTSERVICEMAN COMPLAINT6. CLAIMPROCEDURE Model BTN Limited Warranty4. SERVICEANDREPAIREXPENSES KEEPTHISWARRANTYPOSTEDADJACENTTOTHEHEATERFORFUTUREREFERENCE