A.O. Smith BTR 151 THRU 201/A warranty Heater with Mixing Valve and Recirculated Sanitizing Loop

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ONE OR TWO TEMPERATURE - ONE HEATERS,HIGH TEMPERATURE

STORAGE WITH OR WITHOUT RECIRCULATION

HEATER WITH OR WITHOUT MIXING VALVE

DANGER

TEMPERATURE SETTING SHOULD NOT

EXCEED SAFE USE TEMPERATURE AT

FIXTURES. SEE WATER TEMPERATURE

CONTROL WARNING ON PAGE 20. IF

HIGHER PREHEAT TEMPERATURES ARE

NECESSARY TO OBTAIN ADEQUATE

BOOSTER OUTPUT, ADD AN ANTI-SCALD

VALVE FOR HOT WATER SUPPLIED TO

FIXTURES.

HEATER WITH MIXING VALVE AND RECIRCULATED SANITIZING LOOP

* PIPE RELIEF VALVE TO OPEN DRAIN.

NOTE 1:

TOGGLE SWITCH CONTROLS 180°F (82°C) NOTE 2: INSTALL LINE TEMPERATURE CONTROL

WATER CIRCULATION. INSTALL ON OR CLOSE	IN AN UNINSULATED TEE BEYOND THE
TO DISHWASHING MACHINE. TOGGLE SWITCH	DISHWASHING MACHINE TAKEOFF IN

INSTALL IN ACCORDANCE WITH LOCAL CODES.

CIRCULATING RETURN LINE CONNECTIONS.

-TEMPERED WATER LOOP, IF USED, CONNECT TO POINT “R”.

-STORED TEMPERATURE WATER LOOP, IF USED, CONNECT TO COLD WATER INLET.

MUST BE CLOSED (ON) DURING THE RINSE	THE SANITIZING LOOP. CONTROL
OPERATION AND OPEN (OFF) WHEN	SHOULD BE SET AT 185°F (85°C).
DISHWASHER IS NOT OPERATING OR WHEN
ON LONG STANDBY.	NOTE 3: ADJUST PLUG COCK SO THE SANITIZING
	LOOP FLOW RATE DOES NOT CAUSE
	UNNECESSARY TURBULENCE IN THE
	TANK.

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 HOT WATER SYSTEM MUST BE PROVIDED.

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Contents Placetheseinstructionsadjacenttoheater AndnotifyownertokeepforfuturereferenceDivision of A. O. Smith Corporation Heater Performance Data ROUGH-IN-DIMENSIONSRecovery Rating Capacities GPH AT Temperature Rise Shown ForewordTable of Contents Insulation Blankets FeaturesHigh Altitude Installations Extended NON-USE PeriodsCirculating Pump High Limit SwitchExhaust Inducer Blower Assembly Electronic Ignition ControlLeveling Required AbilityUncrating Locating the HeaterVenting To the Heater and Risk of Fire or Explosion UnconfinedspaceConfinedspace Relief Valve Multiple Heater ManifoldWater Line Connections Water Potable Heating Space HeatingLength Nominal Iron Pipe Sizes Inches Feet GAS PipingPurging GAS Pressure RegulatorSingle Unit Wiring Diagram Heater WiringGeneral Installation DiagramsHorizontal Storage Tank and Forced Circulation Vertical Storage Tank and Forced CirculationPage Circulating Return Line Connection Installation DIAGRAMS-SIDE INLET/OUTLET UsageHeater with Mixing Valve and Recirculated Sanitizing Loop TWO PRE-HEATERS with Booster Heater Horizontal Storage Tank Sequence of Operation OperationWhat to do if YOU Smell GAS For Your Safety Read Before OperatingIgnitor Assembly Preventive MaintenanceWater Temperature Control Check the Ignitor AssemblyVenting System Remote Storage Tank Temperature ControlGAS Valves Checking the InputDraining HOT Water OdorAnode ROD Inspection FlushingTank Cleanout Procedure Deliming Using FLO-JUG MethodDeliming Solvents Ignition Module System ServiceReplacement Parts System DiagnosticsYES Sequence of Operation Flow ChartOperational Checklist Complaint Cause User ServicemanRemedy Tank ServiceandrepairexpensesClaimprocedure KeepthiswarrantypostedadjacenttotheheaterforfuturereferenceSmith Water Products Company