3 Installation

3.10 Electrical connection

Warning

 

The installation shall be carried out by a recognised installation engineer

 

in accordance with the generally and locally applicable regulations

 

(1.3 “Regulations”).

 

 

3.10.1Introduction

This section will cover in the given order:

Preparation;

Connect the mains voltage;

Isolating transformer.

Remark

The optional components have not been included in the electrical power consumption indicated in the table (3.4.2 “General and electrical data”).

3.10.2 Preparation

Caution

The device is phase-sensitive. It is absolutely necessary to connect the phase (L) of the mains to the phase of the device and to connect the zero (Z) of the mains to the zero of the device.

Caution

No voltage difference is allowed between the zero (Z) and the earth ().

If this is the case, apply an isolating transformer (3.10.4 “Isolating transformer”).

Please contact A.O. Smith for additional information or for ordering this isolating transformer. The figure shows a view of the electrical connector block.

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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 Electrical connection, Preparation

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.

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