A.O. Smith TWI 45-190, TWI 35-130 service manual Electrical connection, Preparation

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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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Contents 35-130 45-190 Your installer Page Page Copyright 2007 A.O. Smith Water Products Company Page Maintenance InstallationErrors Operation of the deviceTable of content Warranty certificateWhat to do when you smell gas Regulations IntroductionAbout the device Introduction Target groupsInstallation Chapter Target groups DescriptionWarranty certificate This chapter contains the terms of warrantyOperation of the device Introduction This chapter will cover in the given orderOperation of the device Heating cycleSecurity of the device Introduction Gas control Security of the water temperatureAir pressure switch 4 FanUnvented installation Vented installation3 T&P valve Installation PackagingInstallation Working area Dimensions of the device Dimension Description TWIDimension Description TWI Description Unit TWIVented Circulation piping Cold water sideHot water side Condensation drainageAir supply and flue gas discharge Introduction Requirements for flue gas discharge materialDevice types Device Diameter Maximum length Maximum num Ber of 90 bends Device types DescriptionConcentric connections Practical example of concentric flue gas discharge ExampleSpecifications Subject DescriptionBend Parallel connectionsDevice Diameter Maximum running length Practical example of parallel flue gas discharge ExampleDevice with parallel flue gas discharge material Electrical connection PreparationConnector block Check and adjust the CO2-value Connect the mains voltage Isolating transformerChecking procedure Gas controlAdjust the CO2-value Conversion to another gas category Conversion to another gas category Fill UnventedFill the device Fill unvented installations Fill vented installationsDrain Installations Drain unventedDrain vented Opening the gas valve 3.5 Connections diagram Start upStart up For a short time Shut downIntroduction You can Electrically isolateShut down Errors Introduction Distinction is made between General errorsErrors visible on the control Symptom Cause Solution Remark Gas smell Water leakageExplosive ignition Symptom Cause Solution Remark Insufficient or no Hot waterTroubleshooting table for errors visible on the control Light pulses Cause Solution RemarkLight pulses Cause Solution Remark SL3 See 12.2 Electrical circuit diagramTWI Maintenance Introduction Prepare maintenanceMaintenance 11.2 Warranty tank Warranty certificate11.1 Warranty general 11.3 Conditions11.7 Obligations Warranty certificate11.6 Claims SmithAnnex Electrical circuit diagram AnnexWiring Annex Index ConnectUser Warranty IndexPage 0308 489 R1.0

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.
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