A.O. Smith HW-120M, 225M, 200M, 160M warranty Spark AT Pilot Burner but Pilot will not Light

Page 26

CHART 2

S8600 (NATURAL GAS AND LP GAS)

INTERMITTENT PILOT SYSTEM TROUBLESHOOTING

SPARK AT PILOT BURNER BUT PILOT WILL NOT LIGHT

Attach wires firmly.

Replace gas valve.

Turn on power supply

Securely connect

cable and/or ground

wire.

Replace pilot burner and/or ground wire.

Carefully bend down- wards top of ground strap to achieve 1/8” spark gap.

Replace pilot burner.

Replace ignition

module.

NO

Ensure all manual shutoff valves are fully open; All filters are clean; All gas connections are gas tight; Pilot tubing is not damaged, obstructed or kinked; and pilot orifice is unclogged. Check for air in gas line, purge (bleed) line if necessary.

NO

 

 

 

 

Are the wires securely attached to the pilot operator on the gas

 

 

control and to the PV & MV/PV terminals on the ignition module?

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

Install a pressure gauge in the pilot tubing line between the gas

NO

control and the pilot burner assembly. Ensure that the pilot

 

adjustment screw (under cap) is adjusted to a position that will

 

 

permit gas to flow.

 

Is pilot gas flowing during ignition attempt?

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

Turn off power supply.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NO

Is ignition cable firmly plugged into module?

 

 

 

 

 

Is green ground wire firmly attached to mounting screw

 

and GND terminal on module?

 

 

 

YES

 

 

 

 

 

Is pilot burner ignition cable in good condition (not brittle, burnt, or cracked)?

YES

 

Ensure ground strap is the closest metal to the igniter/sensor

 

rod (electrode) to prevent the spark from shorting out to

NO

other metal parts (pilot screen, pilot shield, etc.).

Ignition cable must not touch metal surfaces or

 

 

current carrying wires.

 

Is there a 1/8” gap between ground strap and electrode?

 

 

 

 

 

YES

NO

 

 

 

 

Are the ceramic insulators surrounding the electrode in good

 

 

condition (not cracked or broken)?

 

 

 

 

 

YES

NO

 

 

Is there excessive draft conditions that may cause pilot

 

burner ignition problems?

 

 

YES

 

 

 

 

Correct draft problems in a manner that would ensure

 

adequate combustion and ventilation air and proper

 

pilot burner performance.

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Contents Models HW-120M, 160M, 200M, 225M Commercial GAS Copper Heat Exchanger Water HeaterROUGH-IN-DIMENSIONS Heater Performance DataForeword Table of ContentsGeneral Safety Information Chemical Vapor Corrosion High Altitude InstallationsGrounding Instructions Liquid Petroleum ModelsThermal Balancer FeaturesAutomatic GAS Shutoff Control Intermittent Ignition Control ModuleCirculating Pump Tank Temperature ControlSafety Flow Switch Intermittent Ignition Control Module I.I.DSafety Flow Switch Settings Drain Valve Not SuppliedInstallation Instructions Relief Valve Proper Vent Pipe InstallationVenting Confined SpaceWater Line Connections Hard WaterClosed Water System Water Potable HeatingPiping Diagrams Page Page Sizing GAS Supply Line GAS ConnectionsCorrect GAS GAS Supply Pipe Sizes in InchesElectrical Information Page Filling OperationGeneral Purging of GAS LineFor Your Safety Read Before Operating Operating Instructions for I.I.D. ModelsChecking and Adjusting the Input Over 170F 77CD. Pilot Burner Service InformationPilot and Main Burner Maintenance Main Burner for HW HeatersThermal Balancer Schematic Diagram Protector SwitchProtector Switch Continuity Test Inspecting the Heat Exchanger Venting SystemReplacement Parts Preventive MaintenanceElectrical Service GAS Pressure RegulatorHeavy Lime Deposits Deliming SolventsRemoving Light Deposits Deliming the HW Water HeaterSystem Operation CheckoutRemoving Silicate No Spark AT Pilot Burner YESSpark AT Pilot Burner but Pilot will not Light Replace pilot burner Replace ignition ModulePilot Burner Lights but Main Burner does not Light MV & MV/PV?Conditions and Exceptions Service and Repair ExpensesClaim Procedure Limitations on Implied Warranties

HW-120M, 225M, 200M, 160M specifications

A.O. Smith is renowned for its range of advanced water heaters, and the 160M, 200M, 225M, and HW-120M models stand out as some of the most reliable and innovative options available. These water heaters are designed to deliver exceptional performance, energy efficiency, and user-friendly features, making them ideal for various residential and commercial applications.

The A.O. Smith 160M model boasts a robust design that ensures longevity and efficiency. It has a 160-gallon capacity, providing ample hot water for households with high demand. This model incorporates insulation technology that minimizes heat loss, contributing to energy savings and reduced utility bills. Additionally, it features a durable exterior that is resistant to rust and corrosion.

The 200M model takes performance a step further with a higher capacity of 200 gallons, making it suitable for larger homes or businesses. This model is equipped with advanced components, including a high-efficiency burner and a powerful thermocouple that ensures reliable heating. The 200M also includes user-friendly controls that allow for precise temperature settings and easy operation.

Next in line is the A.O. Smith 225M, which offers an impressive 225-gallon capacity. This model is designed for heavy-duty usage and features a reinforced tank to withstand high pressure. The 225M is also equipped with state-of-the-art flame retention technology that optimizes fuel use, enhancing the overall efficiency of the unit. This ensures that customers not only get hot water when needed but also experience considerable savings on energy costs.

Finally, the HW-120M model is a compact solution that does not compromise on performance. With a capacity of 120 gallons, it is ideal for smaller households or spaces where water heating needs are moderate. The HW-120M includes features such as an LED display for easy temperature monitoring and an integrated safety system that prevents overheating.

All these models utilize advanced technologies such as electronic ignition and enhanced insulation materials, contributing to a reduction in energy consumption and maintenance needs. The combination of these features makes A.O. Smith appliances a smart choice for consumers looking for efficiency, reliability, and performance. With a strong commitment to craftsmanship and innovation, A.O. Smith continues to set the standard in water heater technology, ensuring customers enjoy reliable hot water access while promoting energy efficiency.
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