A.O. Smith HW 610 warranty

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500 Tennessee Waltz Parkway, Ashland City, TN 37015

Technical Support: 800-527-1953 • Parts: 800-433-2545 • Fax: 800-644-9306

www.hotwater.com

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Contents Models HW 300, 399, 420, 520, 610 Tennessee Waltz Parkway Ashland City, TNSafe INSTALLATION, USE and Service Important DefinitionsGeneral Safety Table of Contents Dimensions and Capacity Data Propane NaturalRecovery Capacities 27.7 33.3LIQUefied petroleum gas models High Altitude InstallationsIntroduction Controls and Function Manual Reset High Limit High Limit Switch Safety Flow SwitchThermal Balancer GPM LPMSafety Relief Valves Tank Temperature Control General ThermometersDrain Valve Not Supplied Required AbilityConfined Space S. Installations Canadian InstallationsAIR Requirements Unconfined SpaceInstallation Clearances Typical Boiler InstallationVenting LevelingVent Pipe Installation Connecting Boiler to a Common VentDraft Hood Vent ConnectionVenting System Venting Sidewall Optional Power Vent SystemMultiple Vent Table Combined Vent Sizing Tables Model HW-300 BoilerSystem Installations Conventional InstallationsLINEAR-TEMP Installations ONE Boiler Installed Independent of the Primary SystemNO. Suggested Items for Installation Schematic of the LINEAR-TEMPSYSTEMBoiler Inlet Outlet Sizes Minimum Branch Sizes to BoilersGAS Connections Purging and Sizing Correct GASExample Specific Multiplier GravityGAS Pressure Regulators Model Rated Manifold Pressure Number Input Natural PropaneWiring Wiring ConnectionsHW 300 to D. SystemSingle Stage I.I.D. Honeywell GAS Valve HW 300 thru 670. Natural and Propane GAS U.S. & CanadaLINEAR-TEMP Installations Boilers and Secondary Circulator are Controlled by Page Canadian MODELS, Junction BOX W/6 Terminals MODELS, Jucntion BOX W/4 TerminalsCanadian MODELS, Junction BOX W/6 Terminals Schematic MODELS, Junction BOX W/4 Terminals MODELS, Junction BOX W/4 Terminals Wiring Figures 16 and 17 on Pages 24 PipingCommercial Boiler with Vertical Tank USE this Table for Correct Pump and Water Pipe SizeCommercial Boiler with Horizontal Tank Wiring Figures 21 to 27 on Pages 28 to Commercial Boiler with Vertical TANK, CER-TEMPHW-300 HW-399 HW-420 HW-520 Three HW-520s, HW-610s or HW-670s UP-FLOW Model USE this Table for Correct Pump and Water Pipe Size Operation and START-UP Instructions Filling the SystemPilot and Main Burner Main BurnerPilot Burner Electronic Ignition Refer to Operating at Full Input or Full Capacity Checking and Adjusting the InputConsumption Rate Stage Main Burner Operation Flame Current Sensed For Your Safety Read Before Lighting SET T HE Thermostat to Lowwest Setting URN Pilo T Firing VA LVE CounterclockwiseRelief Valve General MaintenanceManual Reset High Limit Switch Continuity Test Cleaning and Flushing Instructions PRE-TROUBLESHOOTINGHOT Water Supply Boilers Preventive Maintenance Internal ContaminantsTroubleshooting CER-TEMP 80 Recovery System Checkout ProcedureYES Burner ignition problems? Is ceramic insulator surrounding the electrode in goodCondition not cracked or broken? Is there excessive draft conditions that may cause pilotMV & MV/PV? Replace pilot burner assembly LED Status and Troubleshooting Location of LEDs Flame LED YellowStatus LED Green OFFNo Call for Heat Not applicable None OFF Limited Warranty Conditions and Exceptions