A.O. Smith DB/DW-720-1810 warranty For Your Safety Read Before Operating

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LIGHTING AND OPERATING INSTRUCTIONS

FOR YOUR SAFETY READ BEFORE OPERATING

"WARNING: IF YOU DO NOT FOLLOW THESE INSTRUCTIONS EXACTLY, A FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY DAMAGE, PERSONAL INJURY OR LOSS OF LIFE."

WARNING:

HOT WATER CAN PRODUCE 3rd DEGREE BURNS IN 6 SECONDS AT 140° F. (60° C).

IN CASE OF POWER FAILURE DO NOT ATTEMPT TO OPERATE BOILER. IMPROPER INSTALLATION, ADJUSTMENT, ALTERATION, SERVICE OR MAINTENANCE CAN CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR LOSS OF LIFE. REFER TO THE USER'S INFORMATION MANUAL PROVIDED WITH THIS BOILER. INSTALLATION AND SERVICE MUST BE PERFORMED BY A QUALIFIED INSTALLER, SERVICE AGENCY OR THE GAS SUPPLIER.

A.THIS APPLIANCE IS EQUIPPED WITH AN IGNITION DEVICE WHICH AUTOMATICALLY LIGHTS THE PILOT. DO NOT TRY TO LIGHT THE PILOT BY HAND.

B.BEFORE OPERATING: SMELL ALL AROUND THE APPLIANCE AREA FOR GAS. BE SURE TO SMELL NEXT TO THE FLOOR BECAUSE SOME GAS IS HEAVIER THAN AIR AND WILL SETTLE ON THE FLOOR.

WHAT TO DO IF YOU SMELL GAS

DO NOT TRY TO LIGHT ANY APPLIANCE.

DO NOT TOUCH ANY ELECTRIC SWITCH;

DO NOT USE ANY PHONE IN YOUR BUILDING.

IMMEDIATELY CALL YOUR GAS SUPPLIER FROM A NEIGHBOR’S PHONE. FOLLOW THE GAS SUPPLIER’S INSTRUCTIONS.

IF YOU CANNOT REACH YOUR GAS SUPPLIER, CALL THE FIRE DEPARTMENT.

C.USE ONLY YOUR HAND TO PUSH IN OR TURN THE GAS CONTROL KNOB. NEVER USE TOOLS. IF THE KNOB WILL NOT PUSH IN OR TURN BY HAND, DON’T TRY TO REPAIR IT. CALL A QUALIFIED SERVICE TECHNICIAN. FORCE OR ATTEMPTED REPAIR MAY RESULT IN A FIRE OR EXPLOSION.

D.DO NOT USE THIS APPLIANCE IF ANY PART HAS BEEN UNDER WATER. IMMEDIATELY CALL QUALIFIED SERVICE TECHNICIAN TO INSPECT THE APPLIANCE AND TO REPLACE ANY PART OF THE CONTROL SYSTEM AND ANY GAS CONTROL WHICH HAS BEEN UNDER WATER.

LIGHTING INSTRUCTIONS

1.MAKE SURE BOILER AND SYSTEM ARE FILLED WITH WATER AND ALL AIR HAS BEEN EXPELLED FROM APPLIANCE.

2.TURN OFF ELECTRIC POWER TO THE BOILER. SET SYSTEM TEMPERATURE CONTROLLER TO LOWEST SETTING. PURGE ALL GAS LINES OF AIR.

3.CLOSE MAIN VALVE, FIRING VALVE, PILOT MANUAL VALVE. "WAIT FIVE (5) MINUTES TO CLEAR OUT ANY GAS. THEN SMELL FOR GAS, STOP! FOLLOW "B" IN THE SAFETY INFORMATION ABOVE ON THIS LABEL. IF YOU DO NOT SMELL GAS, GO THE NEXT STEP."

4.OPEN MAIN VALVE, FIRING VALVE AND PILOT MANUAL VALVE.

5.TURN ON ELECTRIC POWER AND SET SYSTEM TEMPERATURE CONTROLLER TO DESIRED OPERATING TEMPERATURE. WHEN CONTROLLER CALLS FOR HEAT, THE CIRCULATING PUMP WILL OPERATE AND THE PILOT BURNER WILL BE SPARK IGNITED. MAIN GAS VALVES WILL OPEN AND MAIN BURNER WILL THEN IGNITE.

NOTE: TRAIL FOR IGNITION IS (15) SECONDS.

NOTE: IF PILOT FAILS TO IGNITE, TURN OFF BOILER AND CONSULT YOUR "INSTALLATION AND USERS MANUAL" FOR ADJUSTMENTS AND TROUBLE- SHOOTING.

6.IF THE APPLIANCE WILL NOT OPERATE, FOLLOW THE INSTRUCTIONS "TO TURN OFF GAS TO APPLIANCE" CALL YOUR SERVICE TECHNICIAN OR GAS SUPPLIER.

TO TURN OFF GAS TO APPLIANCE

A.TURN OFF ELECTRICAL POWER TO BOILER.

B.CLOSE MAIN VALVE, FIRING VALVE AND PILOT MANUAL VALVE.

C.SET SYSTEM TEMPERATURE CONTROLLER TO LOWEST SETTING.

211186-000 REV.01

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Contents TM Models DB/DW-720-1810 Installation Operation Maintenance Limited WarrantyContents Replacement PartsForeword ROUGH-IN Dimensions Capacities Installation ClearancesLevelling Pressure Drop Safety Relief Valves FeaturesManual Reset High Temperature Safety Limit Control Electronic Intermittent Pilot Ignition ControlSafety Flow Switch Automatic Reset High Temperature Limit ControlThermal Balancer Dual Stage Models only HIGH/LOW OperatorRequired Ability Installation InstructionsLocation AIR RequirementsVenting the Boiler Draft HoodVent Connection GAS Connections Connecting Boiler to a Common VentCorrect GAS PurgingWiring Connections High Altitude InstallationsConventional Installations ExampleSystems Equipment Installation Circulating Pump Must be Properly Sized for Your Application Circulating PumpTank Temperature Control System InstallationConventional Space Heating Installation LOW Water CutoffInstallation AS Boiler Replacement DB InstallationPage LINEAR-TEMP Space Heating Applications LINEAR-TEMP Space Heating InstallationsDuraMax Pump Performance Requirements Thermometer Pressure Gauge Safety Flow SwitchONE Boiler LINEAR-TEMP System Page Page Page Page Page Page ONE DURA-MAX Model DW Commercial Boiler with Vertical Tank Hard Water ConditionsONE DURA-MAX Model DW Commercial Boiler with Horizontal Tank NPT NPT Manifolding of Model TJV-120M & TJV-200M Tanks START-UP and Operating Instructions For Your Safety Read Before Operating Checking and Adjusting the Input PrecautionsInternal Contaminants Pilot BurnerTROUBLE-SHOOTING PRE-TROUBLE-SHOOTINGYES No Spark AT Pilot BurnerSpark AT Pilot Burner but Pilot will not Light Pilot Burner Lights but Main Burner does not Light Venting Maintenance General MaintenanceHeat Exchanger Preventive Maintenance Relief ValveRemoving Light Deposits of Scale Deliming SolventsMechanical Removal of Deposits Removal of AN Existing Boiler from a Common Venting SystemDURA-MAX Limited Warranty Page Page Replacement Parts