Dimension

Description

TWI 35-130

TWI 45-190

R

Height drain valve connection

155

155

S

Height T&P valve connection

1040

1395

W

Height condensation drainage

100

100

1

Cold water supply connection

1” NPT

1” NPT

2

Hot water outlet connection

1” NPT

1” NPT

3

Gas control/burner connection

1/2” NPT

3/4” NPT

4

Drain valve connection

3/4” NPT

3/4” NPT

5

T&P valve connection

1” NPT

1” NPT

7

Condensation drainage connection

Rp 1

Rp 1

3.4.2

General and electrical data

 

 

 

General and electrical data

 

 

 

 

 

 

 

Description

 

Unit

TWI 35-130

TWI 45-190

Volume

 

l

129

189

Empty weight

 

kg

70

82

Maximum operating pressure

 

bar

8

8

Fan speed at ignition

 

rpm

0

0

Operating speed of fan

 

rpm

7100

8750

Heating time ΔT = 45°C

 

min.

11

13

Electrical power consumption

 

Watt (W)

200

300

Supply voltage (-15% +10% VAC)

 

Volt (V)

230

230

Mains frequency

 

Hz

50

50

IP-class

 

-

30

30

3.4.3

Gas data

 

 

 

Gas data

 

 

 

 

 

 

 

Description I2H

 

Unit

TWI 35-130

TWI 45-190

Gas category 2H: G20 – 20 mbar

 

 

 

 

Nominal load (Upper value)

 

kW

37,8

50,0

Nominal output

 

kW

35,8

47,3

Supply pressure

 

mbars

20

20

Gas consumption (*)

 

m³/h

3,6

4,8

CO2

 

Vol%

9,0 ± 0,5

9,3 ± 0,5

(*) Based on 1013,15 mbar and 15°C.

Instruction manual TWI 35-130 G/TWI 45-190 G

19

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A.O. Smith TWI 35-130, TWI 45-190 service manual Dimension Description TWI, Description Unit TWI

TWI 35-130, TWI 45-190 specifications

A.O. Smith TWI 35-130 and TWI 45-190 are high-efficiency water heaters designed to meet the diverse needs of residential and commercial applications. These units are part of A.O. Smith’s extensive product line, known for reliability, durability, and energy efficiency.

The TWI 35-130 model is a 35-gallon tank water heater, offering a first-hour delivery of 130 gallons. This capacity makes it suitable for households with moderate hot water demands. It features a compact design, allowing for easy installation in tighter spaces, which is ideal for urban settings. The unit operates on natural gas, promoting energy efficiency while reducing operational costs.

One of its main attributes is the advanced insulation technology that minimizes heat loss, thus enhancing overall energy efficiency. The TWI 35-130 is equipped with a state-of-the-art burner system that optimizes combustion for higher efficiency, translating to lower energy bills. Furthermore, it utilizes a dip tube that helps in delivering hot water promptly, ensuring that the demand for hot water is met swiftly.

On the other hand, the TWI 45-190 model caters to larger households or commercial settings with a 45-gallon capacity and a first-hour delivery of 190 gallons. This model also uses natural gas, but with a higher BTU rating, allowing for faster recovery rates, which is crucial during peak usage times.

Both models are designed with user-friendliness in mind, featuring intuitive controls that facilitate easy temperature adjustments and monitoring. Additionally, they incorporate safety features such as a temperature and pressure relief valve to prevent overheating and excessive pressure build-up, ensuring peace of mind for users.

Their innovative design also emphasizes longevity, with high-grade materials and protective coatings that resist corrosion and extend the lifespan of the tank. The TWI series stands out in the market not only for its performance and efficiency but also for its commitment to sustainability.

In summary, A.O. Smith's TWI 35-130 and TWI 45-190 water heaters bring together cutting-edge technology, efficiency, and reliability, making them excellent choices for both residential and commercial applications. With features designed to promote energy savings and user convenience, these models are poised to meet the hot water demands of modern life while adhering to high standards of safety and durability.