A.O. Smith TC-049-R2 manual Sooting causes If … … then, Electrical Testing

Page 13

RESIDENTIAL GAS AND ELECTRIC WATER HEATER

SERVICE HANDBOOK

Residential Gas - continued

Sooting causes:

If …

… then

the burner is clean but the chamber and/or flue

check for lack of supply air.

are sooted

 

 

the main burner, chamber and flue are sooted

check the following:

 

•

incorrect orifice

 

•

excessive gas pressure

 

•

loose main burner

 

•

cross threaded orifice

 

• gas control valve gas seepage

 

• loose gas connection in burner assembly.

Electrical Testing

 

 

This type of water heater has its own electrical generating system.

When two dissimilar metals are joined together and this joint is heated, a small, electrical current will be produced. A thermocouple uses this science.

Thermocouple output test

Procedures/Conditions:

TO GROUND

Meter set for DC millivolt testing

Test from lower ECO (emergency cut off or energy cut off) solder joint to ground.

Note: If pilot will not stay lit, manually hold the top knob down in the pilot position. This allows gas to flow to the pilot. Light the pilot and continue to hold this knob down while conducting the test.

If …

 

… then

reading test of at least 13

MV is not present

•

check that flame contacts end of

 

 

 

thermocouple

 

 

•

replace thermocouple.

reading test of at least 13

MV is present

continue to next test.

A.O. Smith Water Products Company

12

Training Department

©2002

Ashland City, Tennessee

 

Page 12 Page 14
Image 13
Page 12 Page 14
Contents Smith Service Handbook Residential GAS and Electric Water Heater Table of ContentsQualifications Tools Required Formulas General Section Service GuidelinesMiscellaneous Information General Section ConstructionLighting Pilot Installation of Residential GAS Water HeaterConstruction See also General section of this manual Residental GAS Water Heater ServiceResidential Gas Normal OperationService Handbook Setting Approximate Temperature F Time To Cause Injury Fuel 000Enters Here BTUManifold If … … thenPilot Gas Gas PressureThermocouple output test Procedures/Conditions Electrical TestingSooting causes If … … then Residential Gas Electrical Testing ProceduresIf… … then CondensationCondensation is a mild acid it will corrode steel Exhaust Venting Notes 125 Standard Residential Electric Water Heaters Heating elements ConstructionResidential Electric Voltage NotesSurface Mounted Thermostat s and High Limit s Newer TemperatureLocation Range F Service Handbook Normal Sequence of Operation Wiring DiagramSingle Element Single Thermostat Single High Limit Operation From cold tank of water CircuitElements Thermostats High Limit Operation From cold tank of water Wiring DiagramElements Thermostats High Limits Wire Service Handbook Post Cold tank of water Single Electrical Service Single Phase Certification and Approvals Wattage Three Phase Unbalanced CircuitTest probe on each terminal of an element Element Test Ohms Resistance Check Test ConditionsResidential Electric Service ProcedureComplaint No Hot Water Conditions Test voltage between 4 and 2 or T2 and L4 If … … thenTest between the two element terminals If … … then Residential Electric Service No Hot WaterComplaint Water Too Hot Conditions Voltage Check Test between 4 and 2 or L4 and T2 If … … thenResidential Electric Service Water Too Hot Test around red wire then black wire to element If … … thenGrounded Element Check Amperage Method Circuit Servicing Complaint No hot water Test Conditions Testing with the MultimeterVoltage Check Test between 1 and 3 or L1 and L3 If … … thenComplaint Lack of Hot Water Conditions Residential Electric Service Voltage Check No Hot WaterTest between high limit 4 and lower thermostat 1 or L4 Test between high limit 4 and lower thermostat 2 or L4Service Handbook Supply wiring may be a See Pages 25 Testing The A-7 Wiring CircuitPrior To Post Test probe on each terminal of an element If … … then Voltage Checks Power onTest between upper high limit terminals 1 If … … then Test between upper high limit terminals 2Test between lower high limit terminal 1 and 3 or L1 and L3 Complaint Lack of Hot Water Test ConditionsTest between the terminals of the lower element If … … then Test ConditionPower on Thermostats are satisfied Watts divided by Volts = Amps Replacement elementsVolts times Amps = Watts Service Handbook Smith Technical Bulletins WHY Water Heater Tanks Leak What Prevention What WHY Prevention WHY Water Heater Tanks LeakWater Conditions General Water HammerEffects FIXMineral BUILD-UP SymptomsCause If tank is new with no lime build-up to any degree Aluminum HydroxideTreatment Discolored WaterSmelly Water Procedure Chlorination ProcedureTest Not Enough HOT Water GASNot Enough HOT Water Electric Follow these easy steps to diagnose thermal expansion Thermal ExpansionService Handbook Leaking Temperature and Pressure Relief Valve For every technical problem There is a solution

TC-049-R2 specifications

The A.O. Smith TC-049-R2 is a highly efficient and reliable water heater designed to meet the needs of both residential and light commercial applications. This gas-fired water heater offers a perfect blend of performance, efficiency, and durability, making it a popular choice among homeowners and business owners alike.

One of the standout features of the A.O. Smith TC-049-R2 is its tankless design. Unlike traditional water heaters with storage tanks, the TC-049-R2 heats water on demand, which means you only use energy when you need hot water. This not only results in lower energy bills but also provides an endless supply of hot water, ideal for households with multiple bathrooms or high hot water demands.

The TC-049-R2 is powered by natural gas, which enhances its efficiency and operating costs. With an impressive energy factor, this water heater is designed to conserve energy without compromising on performance. The unit also boasts a high recovery rate, which means it can quickly replenish hot water, ensuring you’re never left waiting.

Another notable technology in the A.O. Smith TC-049-R2 is its advanced electronic ignition system, which provides reliable start-up and reduces the chance of pilot light issues. Additionally, the unit features a scaled-down footprint, making it suitable for installation in tighter spaces, such as closets or utility rooms, without sacrificing performance.

Durability is a key characteristic of the TC-049-R2, as it is constructed with high-quality materials designed to resist corrosion and withstand typical wear and tear. The unit is equipped with a durable heat exchanger that enhances both efficiency and longevity, ensuring many years of reliable service.

Safety features are also prioritized in the A.O. Smith TC-049-R2. It comes equipped with advanced safety controls that prevent overheating and ensure safe operation. This offers peace of mind for users, knowing that the unit has multiple safeguards in place.

Overall, the A.O. Smith TC-049-R2 is an excellent choice for those seeking an efficient, reliable, and safe water heating solution. Its combination of advanced features, innovative technology, and robust construction makes it a leader in the water heater market, providing convenience and comfort to its users for years to come.
Top Page Image Contents