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Net water boiler ratings are based on an allowance of 1.15. ‡ In accordance with U.S. Government test procedures. —12— MODELS BW4 and BW5 The modern design and attractive appearance of the models BW4 and BW5 Oil-Fired Water Boilers make them ideal for installation in any area. The boilers are shipped fully assembled and wired, including all controls (except barometric draft regulator). The compact 22-gage steel cabinet has a baked-on enamel paint finish for durability. A 1-in. layer of thermal insulation is applied inside the jacket for protection and thermal efficiency. The flame retention head burner provides efficient fuel usage. A wet base cast iron block with thermal pins surrounds the combustion area for better heat transfer from flue gases to water. FEATURES BAROMETRIC DRAFT CONTROL—The factory supplied barometric draft control can easily be installed in the vent pipe for optimum draft and combustion efficiency. CONTROLS—Factory-wired controls on units with tankless hot water coil include a triple aquastat relay with high/low limit protection and circulator control. COMBINATION TRANSFORMER AQUASTAT—A 24-v transformer is combined with the aquastat assembly. The transformer will supply power efficient to power a 3-zone system on BW5 models. Factory installed combination pressure/ temperature gage and a pressure relief valve. COIL OPTIONS—Units are available with or without tankless heater coil. The coil provides a supply of hot water for normal domestic purposes or an accessory tankless heater coil can be added later. FACTORY INSTALLED FEATURES—A factory-installed drain is provided should the boiler ever need to be drained. Oil primary control prevents boiler in operation in the event of flame loss. SECTIONS TESTED—Each section is hydrostatically tested to 50 psig. Individual sections are tested to 125 psig at factory. Assembled sections are tested to 75 psig at the factory. The maximum allowable pressure is 50 psig for hot water boilers. EASE OF INSTALLATION—Circulator is shipped pre-wired with 6 ft bx conduit for easy installation for supply side pumping. WARRANTY—The cast-iron sections are covered by a non- prorated 20-year warranty on the entire assembly. Oil burner and circulator pump covered by 3-year warranty. All other parts are covered by a 1-year limited warranty. SOLENOID OIL VALVE—This provides cleaner burning and quieter operation. Valve is included on all burner types. SWING BURNER DOOR—This unique design offers uninhibited access for set-ups, service, and maintaining the burner. Routine cleaning is also much easier. SPECIFICATIONS UNIT SIZE 120 181 239 GENERAL DATA Sections — Fine Grain Cast Iron No. 3 4 5 Water Capacity Gal 9.6 11.6 13.7 Combustion Chamber Target Wall Ceramic Fiber Draft Regulator Furnished Type Manufacturer/Model Beckett/Model AFG Flame Retention Head Burner Oil Pump Single Stage Fuel Type No. 1 or 2 Fuel Oil Rated Load Amps 3 Amps Combination Control Without Heater High Limit, Circulator Relay, & Cad. Cell Relay With Heater High & Low Limit, Circulator Relay, & Cad. Cell Relay Pressure/Temperature Gage Psig 0–60 °F 60–260 ASME Pressure Relief Valve Psig 30 Taco Model 007 Full Load Amps 0.70 Flange Size FPT In. 1-1/4 OIL BURNER CONTROLS CIRCULATOR —13— DIMENSIONS MODELS BW4 and BW5 A19 5.8. GAGE 36. 1 1.4 . RETURN 1 1.4. SUPPLY CONTROL TANKLESS HEATER 1.2. N.P.T. 9. C B 3.4. ASME RELIEF VALVE FRONT SIDE REAR UNIT SIZE A B C 140 17-3/4 6 9-3/4 210 21 6 11-3/8 280 24-1/4 6 13 DIMENSIONS (In.) CLEARANCES (In.) * Clearance 18 in. for BW5. † Service clearance re...

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