A.O. Smith HW 610 specs

THREE HW-520's, HW-610's OR HW-670's UP-FLOW MODEL COMMERCIAL BOILER WITH HORIZONTAL TANK, CER-TEMP 80

DANGER

TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES. SEE TANK TEMPERATURE CONTROL WARNING. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES.

IMPORTANT

THE INSTALLATION OF SAFETY FLOW SWITCH AS SHOWN IS REQUIRED TO PROTECT THE BOILER IN CASE OF WATER SERVICE INTERRUPTION OR CIRCULATOR FAILURE.

+PIPING AND FITTINGS BETWEEN GATE VALVES AND BOILERS SHOULD BE BRASS OR BRONZE. OTHER PIPING SHOULD CONFORM TO LOCAL CODES.

GATE VALVES ARE SHOWN FOR SERVICING BOILER. HOWEVER, LOCAL CODES SHALL GOVERN THEIR USAGE.

*PRESSURE RELIEF VALVE RATING SHOULD NOT EXCEED PRESSURE CAPACITY OF ANY COMPONENT IN THE SYSTEM.

**INSTALL THERMOMETER AND PRESSURE RELIEF IN OPENINGS PROVIDED ON HW-520, HW-610 & HW-670.

USE THIS TABLE FOR CORRECT

PUMP AND WATER PIPE SIZE

	Minimum		B & G
Model	Pipe Size		B & G	*Armstrong
Number	(Inches)		Pump	Pump Size
			Size
	A	B	Size
	A	B
HW-520	2-1/2"	1-1/2"	2"	S-45 2-1/2"
HW-610/670	3"	1-1/2"	3" HD-3	S-46

* Assumes 50 equivalent feet of piping or less.

FIGURE 33.

WIRING - FIGURES 21 to 27 on

pages 28 to 32.

HEATERS SPACED 24" APART

INSTALL IN ACCORDANCE WITH ALL LOCAL CODES

38

Image 38

A.O. Smith HW 610 warranty USE this Table for Correct Pump and Water Pipe Size

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 LIQUefied petroleum gas models High Altitude InstallationsIntroduction 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 System Venting Sidewall Optional Power Vent SystemMultiple Vent Table 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 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 Counterclockwise Relief Valve General MaintenanceManual Reset High Limit Switch Continuity Test 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