A.O. Smith HW 610 specification

START

STAGE 1

TRIAL FOR

IGNITION

THERMOSTAT (CONTROLLER) CALLS FOR HEAT

SPARK GENERATOR POWERED

First valve (pilot) operator opens

PILOT BURNER OPERATION

Pilot burner lights.	Pilot burner does not light
Module senses	Module		Response
Module senses	Module		Response
flame current.	S-8600M		After 15 sec. ignition
			shut-down. 5 minute
			time delay before re-try.

	S-8600H		After 15 sec. ignition
			system locks out
			must be manually reset.

STAGE 2

MAIN BURNER

OPERATION

FLAME CURRENT SENSED

•Spark generator off.

•Second valve operator (main) opens.

MAIN BURNER OPERATION

Module monitors pilot flame current.

POWER INTERRUPTION System shuts off, restarts when power is restored.

PILOT FLAME FAILURE Main valve closes. Module starts trial for ignition.

END

THERMOSTAT (CONTROLLER) SATISFIED Valves close, pilot and main burners are off.

42

Image 42

A.O. Smith HW 610 warranty Stage Main Burner Operation Flame Current Sensed

Contents

Models HW 300, 399, 420, 520, 610 Tennessee Waltz Parkway Ashland City, TN Safe INSTALLATION, USE and Service Important Definitions General Safety Table of Contents Dimensions and Capacity Data Propane Natural Recovery Capacities 27.7 33.3 High Altitude Installations IntroductionLIQUefied petroleum gas models Controls and Function Thermal Balancer Manual Reset High LimitHigh Limit Switch Safety Flow Switch GPM LPM Safety Relief Valves Tank Temperature Control Drain Valve Not Supplied GeneralThermometers Required Ability AIR Requirements Confined Space S. InstallationsCanadian Installations Unconfined Space Venting Installation ClearancesTypical Boiler Installation Leveling Draft Hood Vent Pipe InstallationConnecting Boiler to a Common Vent Vent Connection Venting Sidewall Optional Power Vent System Multiple Vent TableVenting System Combined Vent Sizing Tables Model HW-300 Boiler LINEAR-TEMP Installations System InstallationsConventional Installations ONE Boiler Installed Independent of the Primary System Boiler Inlet Outlet Sizes NO. Suggested Items for InstallationSchematic of the LINEAR-TEMPSYSTEM Minimum Branch Sizes to Boilers GAS Connections Purging and Sizing Correct GAS GAS Pressure Regulators ExampleSpecific Multiplier Gravity Model Rated Manifold Pressure Number Input Natural Propane Wiring Wiring Connections Single Stage I.I.D. Honeywell GAS Valve HW 300 toD. System HW 300 thru 670. Natural and Propane GAS U.S. & Canada LINEAR-TEMP Installations Boilers and Secondary Circulator are Controlled by Page Canadian MODELS, Junction BOX W/6 Terminals MODELS, Jucntion BOX W/4 Terminals Canadian MODELS, Junction BOX W/6 Terminals Schematic MODELS, Junction BOX W/4 Terminals MODELS, Junction BOX W/4 Terminals Commercial Boiler with Vertical Tank Wiring Figures 16 and 17 on Pages 24Piping USE this Table for Correct Pump and Water Pipe Size Commercial Boiler with Horizontal Tank Wiring Figures 21 to 27 on Pages 28 to Commercial Boiler with Vertical TANK, CER-TEMP HW-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 Pilot and Main Burner Operation and START-UP InstructionsFilling the System Main Burner Pilot Burner Electronic Ignition Checking and Adjusting the Input Consumption RateRefer to Operating at Full Input or Full Capacity 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 Counterclockwise General Maintenance Manual Reset High Limit Switch Continuity TestRelief Valve HOT Water Supply Boilers Preventive Maintenance Cleaning and Flushing InstructionsPRE-TROUBLESHOOTING Internal Contaminants Troubleshooting CER-TEMP 80 Recovery System Checkout Procedure YES Condition not cracked or broken? Burner ignition problems?Is ceramic insulator surrounding the electrode in good Is there excessive draft conditions that may cause pilot MV & MV/PV? Replace pilot burner assembly Status LED Green LED Status and TroubleshootingLocation of LEDs Flame LED Yellow OFF No Call for Heat Not applicable None OFF Limited Warranty Conditions and Exceptions