Commercial Boiler with Horizontal Tank | A.O. Smith HW 610 guide

ONE HW-300, HW-399, HW-420, HW-520, HW-610 OR ONE HW-670 UP-FLOW MODEL

COMMERCIAL BOILER WITH HORIZONTAL TANK

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.

DANGER

TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES. SEE TANK TEMPERATURE CONTROL WARNING ON PAGE 11. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES.

WIRING - FIGURES 16 and 17 on

pages 24 and 25.

INSTALL IN ACCORDANCE

WITH ALL LOCAL CODES

USE THIS TABLE FOR CORRECT

PUMP AND WATER PIPE SIZE

	Model	Minimum	B & G	*Armstrong
	Model	Pipe Size	Pump	*Armstrong
	Number	Pipe Size	Pump	Pump Size
	Number	(Inches)	Size	Pump Size
		(Inches)	Size
	HW-300	1-1/4"	125	S-25 1-1/4"
	HW-399	1-1/2"	1-1/2" HV	H-32 1-1/2"
	HW-420	1-1/2"	1-1/2" HV	H-32 1-1/2"
	HW-520	1-1/2"	1-1/2" HV	H-32 1-1/2"
	HW-610/670	2"	2"	S-35

*Assumes 50 equivalent feet of piping or less.

FIGURE 29.

34

Image 34

A.O. Smith HW 610 warranty Commercial Boiler with Horizontal Tank

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 Introduction High Altitude InstallationsLIQUefied 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 Multiple Vent Table Venting Sidewall Optional Power Vent SystemVenting 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 Consumption Rate Checking and Adjusting the InputRefer 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 Manual Reset High Limit Switch Continuity Test General MaintenanceRelief 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