A.O. Smith BTN 120 THRU 400/A Series warranty TECHNICAL DATA VENTING Continued

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TABLE 6. TECHNICAL DATA VENTING (Continued)

TABLE 6. TECHNICAL DATA VENTING (Continued)

MODEL BTN-250

Input: 250,000 Btu/hr							Total Vent Height (Feet)
Vent Connector Size: 6 inches						6	8	10	15	20		30	50	100
			Input Btuh/hr		Rise	Vent Connector Diameter (Inches)
		250,000			1 Ft	8	8	7	7	7		6	6	6
			250,000		2 Ft	7	7	7	7	6		6	6	6
		250,000			3 Ft	7	7	7	7	6		6	6	6
Number			Combined Input
BTN 250 of Heaters			in Thousands of Btu/hr			Manifold and Common Vent Diameter (Inches)
2		500,000				9	9	9	8	8		7	7	7
3		750,000				12	12	10	10	10		9	8	8
4		1,000,000				14	14	12	12	10		10	9	9
MODEL BTN-275
Input: 275,000 Btu/hr							Total Vent Height (Feet)
Vent Connector Size: 6 inches						6	8	10	15	20		30	50	100
			Input Btu/hr		Rise	Vent Connector Diameter (Inches)
	275,000				1 Ft	8	8	7	7	6		6	6	6
	275,000				2 Ft.	8	8	7	7	6		6	6	6
	275,000				3 Ft	7	7	7	7	6		6	6	6
Number of			Combined Input
BTN 275 Heaters			in Thousands of Btu/hr			Manifold and Common Vent Diameter (Inches)
2	550,000					10	9	9	8	8		8	7	7
3	825,000					12	12	12	10	9		9	8	8
4	1,100,000					14	14	14	12	12		10	9	9
MODEL BTN-310
Input: 310,000 Btu/hr							Total Vent Height (Feet)
Vent Connector Size: 6 inches						6	8	10	15	20		30	50	100
			Input Btu/hr		Rise	Vent Connector Diameter (Inches)
	310,000				1 Ft.	9	8	8	8	7		7	6	6
	310,000				2 Ft.	8	8	8	7	7		7	6	6
	310,000				3 Ft.	8	8	8	7	7		7	6	6
Number of			Combined Input
BTN 310 Heaters			in Thousands of Btu/hr			Manifold & Common Vent Diameter
2	620,000					10	10	9	9	8		8	7	7
3	930,000					14	12	12	12	10		9	9	8
4	1,240,000					14	14	14	12	12		12	10	9
MODEL BTN-366, 400
Input: 366,000, 399,000 Btu/hr							Total Vent Height (Feet)
Vent Connector Size: 6 inches						6	8	10	15	20		30	50	100
			Input Btu/hr		Rise	Vent Connector Diameter (Inches)
	366,000				1 Ft	9	9	9	8	8		8	8	8
	399,000				1 Ft	10	9	9	9	8		8	8	8
	366,000				2 Ft	9	9	8	8	8		8	8	8
	399,000				2 Ft	9	9	9	8	8		8	8	8
	366,000				3 Ft	9	8	8	8	8		8	8	8
	399,000				3 Ft	9	9	8	8	8		8	8	8
Number of			Combined Input
BTN Heaters			in Thousands of Btu/hr			Manifold & Common Vent Diameter (Inches)
2	732,000					12	10	10	9	9		9	8	8
	798,000					12	12	10	10	9		9	8	8
3	1,098,000					14	14	14	12	12		10	9	9
	1,197,000					14	14	14	12	12		10	10	9
4	1,464,000					16	16	14	14	14		12	12	10
	1,596,000					16	16	16	14	14		12	12	10

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Contents MODELS BTN 120 THRU 400/A Series INSTALLATION OPERATION MAINTENANCE LIMITED WARRANTYCOMMERCIAL 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 LOOPTWO TEMPERATURE - TWO HEATERS, ONE PRE-HEATER/ONE - BOOSTER HEATER INSTALLATION DIAGRAMS-SIDE INLET/OUTLET USAGEWITH 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 LIGHTING AND OPERATION INSTRUCTIONS FOR YOUR SAFETY READ BEFORE OPERATINGOPERATING 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 SERVICINGSEQUENCE OF OPERATION FLOW CHART REPLACEMENT PARTS, SERVICE HANDBOOKS AND TRAINING AIDSREPLACEMENT PARTS REMEDY OPERATIONAL CHECKLISTSERVICEMAN COMPLAINT6. CLAIMPROCEDURE Model BTN Limited Warranty4. SERVICEANDREPAIREXPENSES KEEPTHISWARRANTYPOSTEDADJACENTTOTHEHEATERFORFUTUREREFERENCE