3 Installation

3.3.1Air humidity and ambient temperature

The installation area should be frost-free or be protected against frost. The table gives the ambient conditions that shall be observed in order to be able to ensure the functioning of the applied electronics.

Specifications for air humidity and ambient temperature

Air humidity and ambient temperature

Air humidity

max. 93% RH at +25°C

Ambient temperature

Functional: 0 ≤ t ≤ 60°C

3.3.2Maximum floor loading

In view of the weight of the device, take the maximum floor loading into account. See the table below.

Specification for weight in connection with the maximum floor loading

Weight of the device filled with water

TWI 35-130

199 kg

TWI 45-190

271 kg

3.3.3Water composition

The device is designed for heating drinking water. The drinking water shall comply with the regulations for drinking water for human consumption. The table gives an overview of the specifications.

Specifications for water

Water composition

Hardness

(alkaline earth ions)

>1.00 mmol/l:

-German hardness > 5.6° dH

-French hardness > 10.0° fH

-British hardness > 7.0° eH

Conductivity

> 125 muS/cm

Acidity (pH-value)

7.0 < pH-value < 9.5

Remark

When the specifications mentioned in the table are deviated from, the protection of the tank can not be guaranteed (11 “Warranty (certificate)”).

3.3.4Working area

In view of the accessibility of the device, it is recommended to apply the following distances (see figure):

AA: on the front side of the device: 100 cm.

BB: around the device: 50 cm.

Top side of the device: 50 cm.

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

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A.O. Smith TWI 45-190, TWI 35-130 service manual Installation

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.