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
Page 46
Image 46
A.O. Smith TC-049-R2 manual Watts divided by Volts = Amps, Volts times Amps = Watts, Replacement elements
Page 45 Page 47

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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