RESIDENTIAL GAS AND ELECTRIC WATER HEATER

SERVICE HANDBOOK

Residential Electric – continued

Surface Mounted Thermostat (s) and High Limit (s)

The thermostats and high limits are held against the side of the tank. As the tank surface heats or cools, a metal disc inside of the control expands or contracts to open or close electrical contacts in the controls.

They will satisfy within 10°F of setting. The tank surface has to cool 8 - 15°F to reactivate these controls.

 

 

 

Newer

 

Temperature

Model

Circuit

Older Models

Models1

Location

Range °F

259T-Style 4100

A-6, A-7

X A-6

 

Upper Tank

110-170

259T-Style 4000

A-6, A-7,

X

X

Lower Tank

110-170

 

C-2

 

 

 

 

389T33

A-6

 

X

Upper Tank

90-150

389T13

C-2, A-7

 

X

Lower Tank

90-150

259T-Style 4000

A-6

 

X

Lower Tank

90-150

2AW-Style 7135

A-7

X

X

Upper Tank

110-170

 

 

 

 

 

 

466T-Style 4400

A-6, A-7,

X

X

Lower Tank

190°

 

C-2

 

 

 

 

389T

A-6, A-7,

 

X

 

170°

 

C-2

 

 

 

 

1Older” = series 916 or older.

“Newer” = series 917 or more current – (Began approximately January, 1996)

2Older 59T controls had a maximum setting of 170°F. Replacement 59T controls will stop at 150°F.

389T controls are combination High Limit/Thermostat, one piece controls.

466T limits may be mounted onto 59T thermostats.

66T4400

59T4100

Thermostat

59T4100

Combination High Limit &

Thermostat

89T 33

A.O. Smith Water Products Company

20

Training Department

©2002

Ashland City, Tennessee

 

Page 21
Image 21
A.O. Smith TC-049-R2 manual Surface Mounted Thermostat s and High Limit s, Newer Temperature, Location Range F

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.