A.O. Smith 160M, 225M, 200M warranty Pilot Burner Lights but Main Burner does not Light, Mv & Mv/Pv?

Page 27

CHART 2

S8600 (NATURAL GAS AND LP GAS)

INTERMITTENT PILOT SYSTEM TROUBLESHOOTING

PILOT BURNER LIGHTS BUT MAIN BURNER DOES NOT LIGHT

Correct the situation by consulting the

 

NO

 

 

 

Does the pilot flame cover 3/8” to 1/2”

installation or user’s manual on how to

 

 

 

 

of igniter/sensor rod?

adjust pilot flame.

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

Replace ignition module.

Attach

wires firmly.

NO

NO

Is voltage (24 Vac) across terminals

MV & MV/PV?

Are the wires securely attached to the main valve operator on the gas control and to terminals MV & MV/PV on ignition module?

NO

Does spark stay on for more than 30 seconds

after the pilot is “proven” (lit)?

YES

Replace main gas valve.

Replace pilot burner.

Replace pilot burner.

Clean rod or replace

pilot burner if necessary.

NO

NO

NO

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

YES

Are the ceramic insulators surrounding the

igniter/sensor rod in good condition

(not broken or cracked)?

YES

Are the igniter/sensor rod in good condition (not worn, corroded, sooted or damaged)?

YES

Replace ignition module.

27

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Contents Commercial GAS Copper Heat Exchanger Water Heater Models HW-120M, 160M, 200M, 225MHeater Performance Data ROUGH-IN-DIMENSIONSTable of Contents General Safety InformationForeword Liquid Petroleum Models High Altitude InstallationsGrounding Instructions Chemical Vapor CorrosionIntermittent Ignition Control Module FeaturesAutomatic GAS Shutoff Control Thermal BalancerIntermittent Ignition Control Module I.I.D Tank Temperature ControlSafety Flow Switch Circulating PumpDrain Valve Not Supplied Safety Flow Switch SettingsInstallation Instructions Confined Space Proper Vent Pipe InstallationVenting Relief ValveWater Potable Heating Hard WaterClosed Water System Water Line ConnectionsPiping Diagrams Page Page GAS Supply Pipe Sizes in Inches GAS ConnectionsCorrect GAS Sizing GAS Supply LineElectrical Information Page Purging of GAS Line OperationGeneral FillingOperating Instructions for I.I.D. Models For Your Safety Read Before OperatingOver 170F 77C Checking and Adjusting the InputMain Burner for HW Heaters Service InformationPilot and Main Burner Maintenance D. Pilot BurnerInspecting the Heat Exchanger Venting System Protector SwitchProtector Switch Continuity Test Thermal Balancer Schematic DiagramGAS Pressure Regulator Preventive MaintenanceElectrical Service Replacement PartsDeliming the HW Water Heater Deliming SolventsRemoving Light Deposits Heavy Lime DepositsCheckout Removing SilicateSystem Operation YES No Spark AT Pilot BurnerReplace pilot burner Replace ignition Module Spark AT Pilot Burner but Pilot will not LightMV & MV/PV? Pilot Burner Lights but Main Burner does not LightLimitations on Implied Warranties Service and Repair ExpensesClaim Procedure Conditions and Exceptions

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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