RESIDENTIAL GAS AND ELECTRIC WATER HEATER

SERVICE HANDBOOK

Residential Electric – continued

SERVICE

Testing C-2 type – single element, single controls type circuit

Element Test

OHMS Resistance Check**

Test Conditions:

This test uses the multimeter's battery as the electrical supply.

Procedures:

Power to the water heater is "OFF".

Multimeter set to OHMS scale testing.

Black lead "Common" port.

Red lead in "Ω" or " OHMS" port.

Dial indicator set to scale above expected indication.

Note: Volts divided by amps = OHMS

Disconnect wires from the element terminals.

Element

Test probe on each terminal of an element

See OHMS Resistance Table – Page 45

If …

… then

 

 

proper resistance (+7.5%) is present

continue testing.

 

 

 

meter reads "0"

•

check OHM scale setting.

 

•

replace element

meter reads "1" or off scale

replace element.

 

 

 

** The above test can also be conducted with the element removed from the tank.

A.O. Smith Water Products Company

31

Training Department

©2002

Ashland City, Tennessee

 

Page 31 Page 33
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A.O. Smith TC-049-R2 manual Element Test Ohms Resistance Check Test Conditions, Test probe on each terminal of an element
Page 31 Page 33

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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