Catalog No.: 2000.303A Effective: 11-15-07 Replaces: 8-15-07Job:Engineer:Contractor:Preparer: Date:Model: Indoor/Outdoor: MBTUH Input:Fast, Economical Natural-to-Propane Gas Switchover100% Factory Fire Tested84% EfficiencyMaximum Outlet Temperature: 230°FMinimum Non-Condensing Inlet Temperature: 105°FThermal Shock Proof Heat ExchangerLimited Twenty-Year Thermal Shock WarrantyDiagnostic Center with Fault HistoryPolyTuf Powder Coated CabinetNo Combustible Floor Shield RequiredFan-Assisted Low NOx BurnersPatented Burner Security BlanketHeat Exchanger H Stamp HeadersGlass-Lined Cast Iron – StandardBronze – Option A-1 ASME Inspected and Stamped160 PSIG Working Pressure National Board Approved Fin TubingCopper – StandardCupro Nickel – Option A-3 ASME Steel Tube Sheet Silicone High Temp. O-Rings ASME Pressure Relief Valve45 PSIG – Standard on Models302BD and 402BD60 PSIG – Standard on Models502BD-902BDPSIG – Optional Temperature and Pressure Gauge Water ConnectionsLeft – StandardRight – Option A-6Controls 120V, 60Hz, 1∅ Power Supply 120/24V 60Hz Transformer 100% Shut-Off/Lockout Hot Surface Ignition Remote Flame Sensor High Limit Control, Manual Reset On/Off Power Switch Manual Shut-Off, Front-Mounted Flow Switch Blocked Vent Pressure Switch Combustion Air Proving Switch Economaster Pump Time Delay Enable/DisableGas Train Manual Gas Shut-Off Valve(s) Gas Pressure Regulator Safety Shut-Off Valve Firing Control Valve Firing ModeOn/Off (H8): Models 302BD,402BD2-Stage (H9): Models302BD-902BD Natural/Propane Gas Design Certified ANSI Z21.13/CSA 4.9 Gas ConnectionLeft – StandardRight – Option Z-1 Construction Indoor/Outdoor Construction Enclosed Front ControlsVenting Vent LocationTop – StandardRear – Option D-14 Vent Termination CapOutdoor D-11Indoor, Horizontal D-15Indoor, Vertical (by others) Combustion AirIn-Line Filter Kit (TruSealonly) D-17Air Intake Elbow D-16 Extractor – OptionalBy othersNot requiredBurner Ultra-Low NOx: Less than 30 PPMTemperature ControlsB-2 Tankstat, Single-Stage(100-200°F)B-3 Tankstat, 2-Stage (100-200°F)B-6 Aquastat, 2-Stage (100-200°F)B- TempTracker Digital Controller,2-StageB- TempTracker Digital Controller,4-StageY-241 Electronic Sequencer, 4-StageY-281 Electronic Sequencer, 8-StageOptionsC-6 Ignition Module, Manual ResetD-21 TruSeal® Direct VentF-10 Low Water Cut-Off, Remote ProbeI-1 High Limit Control, Auto ResetP- Pump: HP, 120V, 1∅, 60HzWater Hardness: GPGCast Iron BronzeMounted LooseFront RearP-26 Cold Water Start (See 2000.48)S-1 Low Gas Pressure Switch, ManualS-2 High Gas Pressure Switch, ManualX-1 SureRack™ KitX-2 SureRack Add-onRegulatory Agency RequirementsHi Delta® FlexGas® - Type HDual-Fuel Hot Water BoilersModels 302BD-902BDPatent Nos. 6,904,873 & 7,044,124;other patents pending