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National Products Series B, BW3 instruction manual Ð24Ð

Models: BW3 Series B

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Catalog No. 63BW-3A1

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National Products Series B, BW3 instruction manual Ð24Ð

Contents

Gas-Fired Induced-DraftHot Water BoilersSeries B Sizes 42,500 through 225,000SAFETY CONSIDERATIONS Page Page PROCEDURE 1ÐBOILER LOCATED IN UNCONFINED SPACE → Table 1ÐRoom Large In Comparison With Boiler→FRESH AIR FOR COMBUSTION PROCEDURE 2ÐBOILER LOCATED IN CONFINED SPACE INSTALLATIONÐSYSTEM PIPING PROCEDURE 1ÐFOR USE WITH COOLING UNITSPROCEDURE 1ÐCHECKING CHIMNEY Fig. 2ÐForced Hot Water Typical PipingPROCEDURE 2ÐMINIMUM VENT PIPE CLEARANCE Table 4ÐBoiler and Power Venter OPTIONAL HORIZONTAL VENTING WITH POWER VENTERFig. 5ÐType-BGas Vent GAS SUPPLY PIPING PROCEDURE 1ÐCHECKING GAS SUPPLY PROCEDURE 2ÐCONNECTING GAS PIPINGTable 5ÐGas Pipe Sizes Fig. 6ÐGas Piping at BoilerPROCEDURE 3ÐCHECKING GAS PIPING ELECTRICAL WIRINGPROCEDURE 1ÐELECTRIC POWER SUPPLY PROCEDURE 2ÐINSTALLING THERMOSTATFig. 7ÐUnit Wiring Diagram Ð12ÐEQUIPMENT AND OPTIONAL ACCESSORIES PROCEDURE 1ÐRELIEF VALVEPROCEDURE 2ÐEXPANSION TANK Optional PROCEDURE 3ÐDIAPHRAGM-TYPEEXPANSION TANK OptionalPROCEDURE 9ÐCIRCULATING PUMP PROCEDURE 10ÐBLOWER DRAFT INDUCERPROCEDURE 11ÐPRESSURE SWITCH PROCEDURE 1ÐHOW A HOT WATER SYSTEM OPERATESWARNING IF YOU SMELL GAS GAS VALVE OPERATING INSTRUCTIONSA.To Turn On Gas To Appliance B.To Turn Off Gas To ApplianceTable 6ÐRecommended Boiler Water Temperatures CHECKING AND ADJUSTINGPROCEDURE 1ÐGAS VALVE SAFETY SHUTDOWN TEST PROCEDURE 2ÐPILOT BURNER ADJUSTMENTMAINTAINING BOILER PROCEDURE 1ÐBURNERS PROCEDURE 2ÐRELIEF VALVEPROCEDURE 3ÐEXPANSION TANK PROCEDURE 4ÐBOILER FLUE PASSAGESWHAT TO DO IF YOU SMELL GAS FOR YOUR SAFETYREPAIR PARTS →FOR USE WITH NATURAL GAS ONLYNatural Gas Burners and Manifold Parts REPAIR PARTS This is a Repair Parts ListÐNot a Packing List→FOR USE WITH PROPANE GAS ONLY Propane Gas Burners and Manifold Parts→REPAIR PARTS Ð21ÐREPAIR PARTS BOILER CONTROLS AND PIPINGDESCRIPTION SERVICE TRAINING CALL FOR FREE CATALOGÐ24Ð