A.O. Smith HW 610 Introduction, LIQUefied petroleum gas models, High Altitude Installations

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INTRODUCTION

This design complies with the current edition of the ANSI Z21.13 low-pressure boiler standard.

Compliance under this standard implies that when the boiler underwent test, the gas manifold and control assembly provided­ on the boiler met safe lighting and other performance criteria.

Detailed installation diagrams are found in this manual. These diagrams will serve to provide the installer a reference for the materials and methods of piping necessary. It is essential that all water, gas piping and wiring be installed as shown on the diagrams. You should thoroughly read and understand this manual before installation and/or operation of this boiler.

The factory warranty will be void if the boiler(s) have been improperly installed or operated.

In addition to these instructions, the boiler(s) shall be installed in accordance with those installation regulations in force in the local area where the installation is to be made. These shall be carefully followed in all cases. Authorities having jurisdiction should be consulted before installations are made.

In the absence of local codes, the installation must comply with the current editions, as follows:

In the United States:

The National Fuel Gas Code, ANSI Z223.1/NFPA 54 and the National Electric Code, NFPA 70.

In Canada:

Installation Code CAN/CSA B149.1 and Canadian Electrical Code, CSA C22.1.

GROUNDING INSTRUCTIONS

IF THE BOILER HAS BEEN EXPOSED TO FLOODING, IT MUST BE REPLACED.

LIQUefied petroleum gas models

Boilers for propane or liquefied petroleum gas (LPG) are different from natural gas models. A natural gas boiler will not function safely on LP gas and no attempt should be made to convert a boiler from natural gas to LP gas.

LP gas must be used with great caution. It is highly explosive and heavier than air. It collects first in the low areas making its odor difficult to detect at nose level. If LP gas is present or even suspected, do not attempt to find the cause yourself. Leave the building, leaving doors open to ventilate, then call your gas supplier or service agent. Keep area clear until a service call has been made.

At times you may not be able to smell an LP gas leak. One cause is odor fade, which is a loss of the chemical odorant that gives LP gas its distinctive smell. Another cause can be your physical condition, such as having a cold or diminishing sense of smell with age. For these reasons, the use of a propane gas detector is recommended.

IF YOU EXPERIENCE AN OUT OF GAS SITUATION, DO NOT TRY TO RELIGHT APPLIANCES YOURSELF. Call your local service agent. Only trained LP professionals should conduct the required safety checks in accordance with industry standards.

HIGH ALTITUDE INSTALLATIONS

This boiler must be grounded in accordance with the National Electrical Code, Canadian Electrical Code and/or local codes. Correct wiring is imperative for proper operation.

This boiler must be connected to a grounded metal, permanent wiring system, or an equipment grounding conductor must be run with the circuit conductors and connected to the equipment grounding terminal or lead on the boiler.

CORRECT GAS

MAKE SURE THE GAS ON WHICH THE BOILER WILL OPERATE IS THE SAME AS THAT SPECIFIED­ ON THE BOILER RATING PLATE. DO NOT INSTALL THE BOILER IF EQUIPPED FOR A DIFFERENT TYPE OF GAS — CONSULT YOUR SUPPLIER.

PRECAUTIONS

IF THE UNIT IS EXPOSED TO THE FOLLOWING, DO NOT OPERATE UNTIL ALL CORRECTIVE STEPS HAVE BEEN MADE BY A QUALIFIED SERVICEMAN:

1.EXPOSURE TO FIRE.

2.IF DAMAGED.

3.FIRING WITHOUT WATER.

4.SOOTING.

Rated inputs are suitable up to 2000 feet (610 m) elevation. Consult the factory for installation at altitudes over 2000 feet (610 m).

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Contents Tennessee Waltz Parkway Ashland City, TN Models HW 300, 399, 420, 520, 610Important Definitions Safe INSTALLATION, USE and ServiceGeneral Safety Table of Contents Propane Natural Dimensions and Capacity Data27.7 33.3 Recovery CapacitiesIntroduction High Altitude InstallationsLIQUefied petroleum gas models Controls and Function GPM LPM Manual Reset High LimitHigh Limit Switch Safety Flow Switch Thermal BalancerSafety Relief Valves Tank Temperature Control Required Ability GeneralThermometers Drain Valve Not SuppliedUnconfined Space Confined Space S. InstallationsCanadian Installations AIR RequirementsLeveling Installation ClearancesTypical Boiler Installation VentingVent Connection Vent Pipe InstallationConnecting Boiler to a Common Vent Draft HoodMultiple Vent Table Venting Sidewall Optional Power Vent SystemVenting System Model HW-300 Boiler Combined Vent Sizing TablesONE Boiler Installed Independent of the Primary System System InstallationsConventional Installations LINEAR-TEMP InstallationsMinimum Branch Sizes to Boilers NO. Suggested Items for InstallationSchematic of the LINEAR-TEMPSYSTEM Boiler Inlet Outlet SizesGAS Connections Correct GAS Purging and SizingModel Rated Manifold Pressure Number Input Natural Propane ExampleSpecific Multiplier Gravity GAS Pressure RegulatorsWiring Connections WiringHW 300 thru 670. Natural and Propane GAS U.S. & Canada HW 300 toD. System Single Stage I.I.D. Honeywell GAS ValveLINEAR-TEMP Installations Boilers and Secondary Circulator are Controlled by Page MODELS, Jucntion BOX W/4 Terminals Canadian MODELS, Junction BOX W/6 TerminalsCanadian MODELS, Junction BOX W/6 Terminals Schematic MODELS, Junction BOX W/4 Terminals MODELS, Junction BOX W/4 Terminals USE this Table for Correct Pump and Water Pipe Size Wiring Figures 16 and 17 on Pages 24Piping Commercial Boiler with Vertical TankCommercial Boiler with Horizontal Tank Commercial Boiler with Vertical TANK, CER-TEMP Wiring Figures 21 to 27 on Pages 28 toHW-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 Main Burner Operation and START-UP InstructionsFilling the System Pilot and Main BurnerPilot 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 URN Pilo T Firing VA LVE Counterclockwise SET T HE Thermostat to Lowwest SettingManual Reset High Limit Switch Continuity Test General MaintenanceRelief Valve Internal Contaminants Cleaning and Flushing InstructionsPRE-TROUBLESHOOTING HOT Water Supply Boilers Preventive MaintenanceCER-TEMP 80 Recovery System Checkout Procedure TroubleshootingYES Is there excessive draft conditions that may cause pilot Burner ignition problems?Is ceramic insulator surrounding the electrode in good Condition not cracked or broken?MV & MV/PV? Replace pilot burner assembly OFF LED Status and TroubleshootingLocation of LEDs Flame LED Yellow Status LED GreenNo Call for Heat Not applicable None OFF Conditions and Exceptions Limited Warranty
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