A.O. Smith TC-049-R2 manual Watts divided by Volts = Amps, Volts times Amps = Watts

Page 46

RESIDENTIAL GAS AND ELECTRIC WATER HEATER

SERVICE HANDBOOK

Miscellaneous Residential Electric Water Heater Service Items:

•Watts divided by Volts = Amps

Supply wire gauge and fuse (breaker) protection must be at least 125% of the expected Amperage draw of the water heater.

•Volts times Amps = Watts

Replace elements with elements rated at the same wattage and voltage indicated on the heater model and rating plate. Installing an element with a higher voltage rating or wattage output may create a safety hazard by overloading the heater wiring or supply wiring or fusing. Installing an element with a lower wattage or voltage rating will reduce performance.

•Normally, a residential electric water heater with two elements will have only one element operate at a time. If the upper element or thermostat fails, the customer will be out of hot water. If the lower element or thermostat fails, the customer should still have 1/3 of the tank with hot water.

•With two element heaters, the lower element and thermostat will cycle more frequently than the upper element and thermostat. For this reason, the lower element will normally accumulate lime faster and fail more often than the upper element. Lower thermostats will fail more often than upper thermostats.

•Replacement elements:

Replace elements with an element having the most surface area (low watt density) available for your water heater. By spreading the heat of the element over a greater area, lime (calcium) buildup rate should be reduced.

Elements constructed of Incoloy are much more durable than elements made of copper with zinc coating.

•Many electric utilities offer discounts if you do not use electricity during certain times of the day. Contact them – by purchasing a larger storage water heater, with special wiring (see A-7 wiring circuit) for time clocks or “off peak meters”, you may save on monthly operating costs.

Element with Links

Resistance of Element in Ohms (± 7.5%)

Rated

 

 

 

Rated Wattage

 

 

 

Voltage

600

750

1000

 

1250

 

1500

2000

2500

120

23.2

18.6

13.9

 

11.1

 

9.28

6.96

5.57

208

72.1

57.7

43.3

 

34.6

 

28.8

21.6

17.3

240

92.8

74.3

55.7

 

44.6

 

37.1

27.8

22.3

277

128

102

76.7

 

61.4

 

51.2

38.4

30.7

 

Rated

 

 

 

Rated Wattage

 

 

 

 

 

Voltage

3000

3500

4000

 

4500

 

5000

5500

6000

 

 

120

4.64

 

 

 

 

 

 

 

 

 

 

208

14.4

12.4

10.8

 

9.61

 

8.65

7.85*

7.2

 

 

240

18.6

15.9

13.9

 

12.4

 

11.1

10.1*

9.28

 

 

277

25.6

21.9

19.2

 

17.1

 

15.3

14.0

12.8

 

 

480

76.8

65.7

57.5

 

51.1

 

45.7

41.8

38.4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A.O. Smith Water Products Company

 

45

 

 

Training Department

 

 

©2002

 

 

 

 

 

Ashland City, Tennessee

 

 

 

 

 

 

 

 

 

 

Page 45 Page 47
Image 46
Page 45 Page 47
Contents Smith Service Handbook Table of Contents Residential GAS and Electric Water HeaterQualifications Tools Required Formulas General Section Service GuidelinesMiscellaneous Information Construction General SectionInstallation of Residential GAS Water Heater Lighting PilotResidental GAS Water Heater Service Construction See also General section of this manualNormal Operation Residential GasService Handbook Setting Approximate Temperature F Time To Cause Injury Enters Here 000Fuel BTUPilot Gas If … … thenManifold Gas PressureThermocouple output test Procedures/Conditions Electrical TestingSooting causes If … … then If… … then ProceduresResidential Gas Electrical Testing CondensationCondensation is a mild acid it will corrode steel Exhaust Venting Notes 125 Standard Residential Electric Water Heaters Construction Heating elementsVoltage Notes Residential ElectricSurface 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 Wiring Diagram Operation From cold tank of waterElements Thermostats High Limits Wire Service Handbook Post Cold tank of water Single Electrical Service Single Phase Certification and Approvals Three Phase Unbalanced Circuit WattageElement Test Ohms Resistance Check Test Conditions Test probe on each terminal of an elementComplaint No Hot Water Conditions ProcedureResidential Electric Service Test voltage between 4 and 2 or T2 and L4 If … … thenComplaint Water Too Hot Conditions Residential Electric Service No Hot WaterTest between the two element terminals If … … then 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 Voltage Check Testing with the MultimeterComplaint No hot water Test Conditions Test between 1 and 3 or L1 and L3 If … … thenTest between high limit 4 and lower thermostat 1 or L4 Residential Electric Service Voltage Check No Hot WaterComplaint Lack of Hot Water Conditions 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 Test between upper high limit terminals 1 If … … then Power onVoltage Checks Test between upper high limit terminals 2Complaint Lack of Hot Water Test Conditions Test between lower high limit terminal 1 and 3 or L1 and L3Test Condition Test between the terminals of the lower element If … … thenPower 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 Effects Water HammerGeneral FIXMineral BUILD-UP SymptomsCause Aluminum Hydroxide If tank is new with no lime build-up to any degreeDiscolored Water TreatmentSmelly Water Chlorination Procedure ProcedureNot Enough HOT Water GAS TestNot Enough HOT Water Electric Thermal Expansion Follow these easy steps to diagnose 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.
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