A.O. Smith FDVT, SDV owner manual Troubleshooting

Page 22

TROUBLESHOOTING

Please check guidelines below. For your safety, water heater service should be performed only by a qualified service technician. Read the GENERAL SAFETY INFORMATION section first.

PROBLEM

POSSIBLE MALFUNCTION

SERVICE TO BE PERFORMED

 

POSSIBLE SOLUTION

NO HOT WATER

1)

No pilot

 

 

 

 

 

A.

No gas to pilot

Check gas supply

 

Turn on, check pressure

 

 

 

 

Check gas valve

 

Turn on or replace if needed

 

 

 

 

Check pilot orifice for obstruction

 

Clean with air or replace

 

 

 

 

Check pilot tube for kink or leaks

 

Replace pilot tube

 

 

B.

Pilot will not stay lit

Check gas pressure

 

 

 

 

 

 

Check thermostat MV drop-out voltage

 

 

 

 

 

 

Check thermocouple connection and

 

Tighten if loose, replace

 

 

 

 

MV output

 

as necessary

 

 

 

 

Check thermocouple placement in pilot flame

 

3/8- should be in flame

 

 

 

 

Check pilot for proper flame

 

Change pilot orifice

 

 

 

 

Check ECO operation

 

Replace gas valve

 

 

 

 

Check for air in pilot tube

 

Bleed as necessary

 

 

 

 

 

 

 

 

 

C.

Pilot blows out

Leaking joints

 

Check all vent joints for proper seal.

 

 

 

 

 

 

Make sure to check inner and outer

 

 

 

 

 

 

pipe and check rear air tube seals.

 

 

 

 

 

 

Refer to installation manual.

 

 

 

 

Check for proper vent cap

 

Install A. O. Smith provided vent cap

 

 

 

 

Check for bent, missing, or mislocated

 

 

 

 

 

 

pilot shield (natural gas units only)

 

Replace or reposition

 

 

 

 

Check outer door seal

 

Replace gasket if missing

 

 

 

 

 

 

Tighten screws if loose

 

 

 

 

 

 

Install gasket properly if misinstalled

NOT ENOUGH

1)

Incorrect burner orifice

Check orifice size

 

Replace with correct size

HOT WATER

2)

No gas to main burner

Check gas supply

 

Correct as needed

 

 

 

 

Check thermostat operation

 

Replace as needed

 

3)

Heater too small

Confirm sizing requirements

 

Replace with larger heater, add

 

 

 

 

 

 

another heater, or decrease

 

 

 

 

 

 

water usage.

YELLOW FLAMES

1)

Excessive or low gas

Check gas pressure

 

 

OR SOOT

 

pressure

 

 

 

 

2)

Combustion air restricted

Check vent for restrictions

 

Correct as necessary

 

 

 

 

Check venting for extra piping

 

Re-install as recommended in

 

 

 

 

 

 

the installation manual

CONDENSATION

1)

Water on floor under heater

See page 21 “CONDENSATION”

 

 

 

 

 

 

 

 

BURNER WILL

1)

Low gas pressure

Check gas supply pressure

 

 

NOT STAY LIT

 

 

 

 

 

 

 

 

 

Check thermostat operation

 

 

 

2)

Downdraft or

Check for proper vent cap

 

Install proper vent cap

 

 

 

backdraft condition

Check location of heater

 

Re-install in correct location

 

 

 

 

Check for proper vent sealing

 

Reseal venting

 

 

 

 

Check top and/or bottom air supply

 

Seal as necessary

 

 

 

 

box for air leaks

 

 

 

 

 

 

Check outer door seal

 

Replace gasket, tighten screws

 

 

 

 

 

 

or re-install gasket as necessary

 

 

 

 

 

 

 

22

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Contents FDV/FDVT/SDV Typical Installation Replacement PartsGeneral Safety Information InstallationClosed Water System Water Potable Heating and Space HeatingGAS Connections Vent Pipe Termination Relief ValveVenting Combustion AIR and VentilationVenting Clearances Optional Wire GrillFlue Extensions Horizontal Extension KIT Possible Extension CombinationsVertical Extension KIT Height Equation D + G = ECutting the Opening Through Outside Wall ALL InstallationsWater Heater Attitude Page ANY Optional Vent KIT Equation C a -10 = GallonPage Optional Horizontal Vent KIT #900124-7 Installation #3 Page Page Equation C a 10 = Page Operation High Altitude InstallationsFilling For Your Safety Read Before Lighting Lighting InstructionsTemperature Regulation MaintenancePilot and Main Burner Draining Temperature & Pressure Relief ValveAnode ROD Maintenance CondensationTroubleshooting Conditions and Exceptions Service and Labor ResponsibilityClaim Procedure Limitation on Implied WarrantiesTH STREET, ALSIP, IL Phone 1-800-433-2545 FAX

SDV, FDVT, FDV specifications

A.O. Smith is a leading name in the water heating industry, known for its innovative products and commitment to quality. Among its extensive lineup, the FDV, FDVT, and SDV series stand out due to their advanced features and technologies designed to enhance performance and efficiency.

The FDV series represents a revolution in traditional water heating solutions. These direct vent water heaters are designed to provide hot water on demand while minimizing energy consumption. The FDV models utilize a dual venting system, allowing for the efficient expulsion of combustion gases outside the home while drawing in fresh air for the combustion process. This design increases efficiency by ensuring optimal combustion and improves safety by reducing the risk of indoor air contamination.

The FDVT series builds upon the innovative features of the FDV, integrating a tankless design that provides unlimited hot water. This makes it an ideal choice for households with higher hot water demands. The FDVT models use high-efficiency burners and advanced heat exchangers to deliver hot water quickly and consistently, adapting to varying flow rates. They are also equipped with intelligent control systems that monitor water usage patterns and adjust operation accordingly, optimizing energy efficiency without sacrificing performance.

The SDV series caters to those looking for a reliable and efficient storage tank water heater. With a robust construction and reliable design, these water heaters are built to last. The SDV models are designed with high-quality insulation to minimize heat loss, making them energy-efficient options for storing hot water. Additional features include built-in safety mechanisms, such as temperature and pressure relief valves, ensuring safe operation at all times.

A.O. Smith's commitment to innovation is evident in their use of cutting-edge technologies across these series. Both the FDV and FDVT models incorporate sophisticated electronic controls, enabling features like scheduling and remote access for greater convenience. They are compatible with smart home systems, allowing users to monitor and manage water heating remotely.

In terms of energy efficiency, models within these series are designed to exceed industry standards, often qualifying for energy rebates and incentives in various regions. With features such as modulating burners, they adjust the energy input based on demand, significantly reducing operational costs.

Overall, A.O. Smith's FDV, FDVT, and SDV series represent leading-edge solutions in water heating, combining efficiency, safety, and advanced technology to meet the diverse needs of modern households. Whether seeking endless hot water or reliable storage solutions, these series offer unparalleled options that prioritize performance and sustainability.
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