A.O. Smith TC-049-R2 manual Cold tank of water Single Electrical Service Single Phase

Page 29

RESIDENTIAL GAS AND ELECTRIC WATER HEATER

SERVICE HANDBOOK

Residential Electric – continued

Cold tank of water

•Single Electrical Service

•Single Phase

A-7 Circuit

Post 1995

Fused Disconnect

Power to Upper High Limit 1, and Upper Thermostat 3

Upper High Limit 1, 2 is Closed.

Upper Thermostat 3, 4 is Open

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Upper Thermostat 1, 2 is Closed

No Power

 

 

Upper Element is On

to Lower

 

 

 

 

 

 

 

High Limit

 

 

 

 

 

 

 

Terminal 1

 

Top 1/3 of Tank is Heated

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Upper Thermostat 1, 2 Opens

 

 

 

Upper Thermostat 3, 4 Closes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power Flows Between

 

 

 

 

 

 

 

Upper Thermostat 4 and

 

 

 

 

 

Lower High Limit L1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Lower High Limit L1 and

 

 

 

 

Lower Thermostat T2 is Closed

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power to Upper High Limit 3 and Lower High Limit L3

Upper High Limit 3, 4 is Closed Lower High Limit L3, L4 is Closed

Lower Element Heats Bottom 2/3 of Tank

A.O. Smith Water Products Company

28

Training Department

©2002

Ashland City, Tennessee

 

Page 28 Page 30
Image 29
Page 28 Page 30
Contents Smith Service Handbook Residential GAS and Electric Water Heater Table of ContentsQualifications Tools Required Miscellaneous Information General Section Service GuidelinesFormulas 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 PressureSooting causes If … … then Electrical TestingThermocouple output test Procedures/Conditions 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 NotesLocation Range F Newer TemperatureSurface Mounted Thermostat s and High Limit s Service Handbook Single Element Single Thermostat Single High Limit Wiring DiagramNormal Sequence of Operation Elements Thermostats High Limit CircuitOperation From cold tank of water 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 … … thenGrounded Element Check Amperage Method Test around red wire then black wire to element If … … thenResidential Electric Service Water Too Hot 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 Prior To Post Testing The A-7 Wiring CircuitSupply wiring may be a See Pages 25 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 Volts times Amps = Watts Replacement elementsWatts divided by Volts = Amps Service Handbook Smith Technical Bulletins WHY Water Heater Tanks Leak What Prevention Water Conditions WHY Water Heater Tanks LeakWhat WHY Prevention General Water HammerEffects FIXCause SymptomsMineral BUILD-UP 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