A.O. Smith warranty TM Models DB/DW-720-1810

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TM MODELS DB/DW-720-1810

Built tough with maximum efficiency

NATURAL GAS-FIRED COMMERCIAL CROSS FLOW COPPER BOILERS

FOR HYDRONIC HEATING AND HOT WATER SUPPLY

WITH ELECTRONIC INTERMITTENT PILOT IGNITION AND

INSTALLATIONS

• INSTALLATION • OPERATION • MAINTENANCE • LIMITED WARRANTY

WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

WHAT TO DO IF YOU SMELL GAS

·Do not try to light any appliance.

·Do not touch any electrical 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.

Installation and service must be performed by a qualified installer, service agency or the gas supplier.

CAUTION

TEXT PRINTED OR OUTLINED IN RED CONTAINS

INFORMATION RELATIVE TO YOUR SAFETY. PLEASE READ THOROUGHLY BEFORE INSTALLING AND USING THIS APPLIANCE.

A DIVISION OF A.O.SMITH CORPORATION

EL PASO, TX McBEE, SC RENTON, WA

STRATFORD, ONTARIO

VELDHOVEN, THE NETHERLANDS

www.hotwater.com

PLACE THESE INSTRUCTIONS ADJACENT TO BOILER AND

NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.

PRINTED IN U.S.A. 2221 0302

PART NO. 211680-000 REV. 00

 

SUPERSEDES PART NO. 200311-000 REV. 4 & 210265-000 REV. 0

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Contents TM Models DB/DW-720-1810 Installation Operation Maintenance Limited WarrantyReplacement Parts ContentsForeword Installation Clearances ROUGH-IN Dimensions CapacitiesLevelling 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 RequirementsDraft Hood Venting the BoilerVent 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