A.O. Smith BTH 120 - 250 warranty

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

WITH OR WITHOUT BUILDING RECIRCULATION

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 WATERSUPPLIEDTOFIXTURES

* PIPE RELIEF VALVE TO OPEN DRAIN

**140°F TO 150°F SHOULD BE MAXIMUM WATER TEMPERATURE MAINTAINEDINTHEPRE-HEATERS.

120°F SHOULD BE THE MINIMUM TEMPERATURE OF WATER IN THE PRE-HEATERS.

CONNECT CIRCULATING LINE FROM FIXTURES, IF USED, TOCOLD WATER SUPPLY LINE OF PRE-HEATER.

CONNECT CIRCULATING LINE OF 180°F OR BOOSTED WATER, IF USED, TO INLET WATER LINE TO BOOSTER.

INSTALL IN ACCORDANCE WITH LOCAL CODES.

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Contents
Place These Instructions Adjacent to Heater Notify Owner to Keep for Future ReferenceROUGH-IN -DIMENSIONS Cyclone XHE BTH 120 BTUTable of Contents ForewordHigh Limit Switch E.C.O FeaturesWater Temperature Control Dishwashing Machine Requirement Installation InstructionsInsulation Blankets Circulating PumpAIR Requirements ClearancesHard Water Mechanical Exhausting of Room AIRPage PVC Elbow with Mesh Screen Direct Vent Terminal InstallationDirect Venting Masonry Side Walls Installation SequenceVent Pipe Manufacturers Installation Instructions Wooden Side WallsVertical Vent Terminal Installation Installation of Vent SystemVent Pipe Preparation Controls and SwitchesBlower Prover Switch GAS Piping System Connections BSR Board BTH 250 only Figure Water Line Connections Heater WiringClosed System Sequence of Operation Self Diagnostic ControllerOperation GAS Valve LED FlashingError Codes Fault ConditionsDisplay Flashes 05 when button is pressed Required Ability Initial START-UP Prior to Start UP Adjustment ProcedureOperating Instructions For Your Safety Read Before Operating Maintenance General InformationDraining Anode Inspection and ReplacementFlushing Sediment RemovalDrain Valve and Access Panels Vent SystemInstallation Diagrams Install in Accordance with Local Codes Page Page Page Manifold Kits Checklist and Service Information TROUBLE-SHOOTINGMotor RUNS, Burner Lights Momentarily Then Locks OUT Replacement PartsMotor will not RUN Noisy Burner OperationTank Service and Repair ExpensesClaim Procedure ALL Other PartsSmith Water Products CO., INC