A.O. Smith BTH 120 - 250 warranty

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TWO TEMPERATURE - TWO HEATERS HIGH TEMPERATURE

WITH OR WITHOUT BUILDING RECIRCULATION

TWO TEMPERATURE - THREE HEATERS (TWO PRE-HEATERS/ONE BOOSTER HEATER)

WITH OR WITHOUT BUILDING RECIRCULATION

MUST BE IDENTICAL HEATERS

FOR MULTIPLE HEATER INSTALLATION SEE MANIFOLD KIT SPECIFICATIONS, PAGE 28.

CAUTION: IF BUILDING COLD WATER SUPPLY HAS A BACK-FLOW PREVENTER, CHECK VALVE OR WATER METER WITH CHECK VALVE PROVISIONS FOR THERMAL EXPANSION OF WATER IN THE HOT WATER SYSTEM MUST BE PROVIDED.

DANGER

TEMPERATURE SETTING SHOULD NOT EXCEED SAFE TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ON PAGE 4. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES.

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Contents
Notify Owner to Keep for Future Reference Place These Instructions Adjacent to HeaterBTU ROUGH-IN -DIMENSIONS Cyclone XHE BTH 120Foreword Table of ContentsWater Temperature Control FeaturesHigh Limit Switch E.C.O Insulation Blankets Installation InstructionsDishwashing Machine Requirement Circulating PumpHard Water ClearancesAIR Requirements Mechanical Exhausting of Room AIRPage Direct Venting Direct Vent Terminal InstallationPVC Elbow with Mesh Screen Vent Pipe Manufacturers Installation Instructions Installation SequenceMasonry Side Walls Wooden Side WallsInstallation of Vent System Vertical Vent Terminal InstallationBlower Prover Switch Controls and SwitchesVent Pipe Preparation GAS Piping System Connections Closed System Water Line Connections Heater WiringBSR Board BTH 250 only Figure Operation Self Diagnostic ControllerSequence of Operation GAS Valve LED FlashingFault Conditions Error CodesDisplay Flashes 05 when button is pressed Operating Instructions Prior to Start UP Adjustment ProcedureRequired Ability Initial START-UP For Your Safety Read Before Operating General Information MaintenanceFlushing Anode Inspection and ReplacementDraining Sediment RemovalVent System Drain Valve and Access PanelsInstallation Diagrams Install in Accordance with Local Codes Page Page Page Manifold Kits TROUBLE-SHOOTING Checklist and Service InformationMotor will not RUN Replacement PartsMotor RUNS, Burner Lights Momentarily Then Locks OUT Noisy Burner OperationClaim Procedure Service and Repair ExpensesTank ALL Other PartsSmith Water Products CO., INC