A.O. Smith TWI 45-190, TWI 35-130 Troubleshooting table for errors visible on the control

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

9.3Troubleshooting table for errors visible on the control

Errors visible on the control

Light pulses

Cause

Solution

Remark

 

 

 

 

1 (SC)

Defective air pressure

Replace the air pressure switch.

The error will automatically disappear when the air pressure

Air pressure switch

switch

 

 

switch opens again.

closed

 

 

 

 

 

 

 

 

 

2 (SC)

Break in the cable /

1.

Check the cabling between the air pressure switch and the

Contact the installation engineer if the error cannot be remedied

Air pressure switch is

Open circuit

 

control.

or if it reoccurs. Also contact the installation engineer for replacing

not functioning well

 

2.

Replace the cabling if necessary.

the required parts.

 

 

 

 

 

 

Air pressure switch

1.

Check if the fan is running

 

 

does not close

2.

Check if the hoses are correctly mounted on the air pressure

 

 

 

 

switch.

 

 

 

3.

Check the hoses on the air pressure switch for cracks.

 

 

 

 

Replace the hoses if necessary.

 

 

 

4.

Check if the flue gas discharge is sufficient (3.8 “Air supply

 

 

 

 

and flue gas discharge”).

 

 

 

5.

Check for blockage of the air supply and the flue gas

 

 

 

 

discharge. Remove any blockage.

 

 

 

6.

Check for blockage of the condensation drainage. Remove

 

 

 

 

any blockage.

 

 

 

7.

Measure the pressure difference over the pressure switch.

 

 

 

 

See the table in (10.2 “Prepare maintenance”). Clean the

 

 

 

 

heat exchanger and burner in case of insufficient pressure

 

 

 

 

difference. If the pressure difference is sufficient, check if the

 

 

 

 

air pressure switch closes using a multimeter.

 

 

 

8.

Check the supply voltage. This should be 230VAC

 

 

 

 

(-15% +10%).

 

 

 

 

 

 

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 Installation ErrorsMaintenance 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 Security of the water temperature Air pressure switchGas control 4 FanUnvented installation Vented installation3 T&P valve Installation PackagingInstallation Working area Dimensions of the device Dimension Description TWIDimension Description TWI Description Unit TWIVented Cold water side Hot water sideCirculation piping Condensation drainageAir supply and flue gas discharge Introduction Requirements for flue gas discharge materialDevice types Device types Description Concentric connectionsDevice Diameter Maximum length Maximum num Ber of 90 bends Practical example of concentric flue gas discharge ExampleSpecifications Subject DescriptionParallel connections Device Diameter Maximum running lengthBend 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 Shut down Introduction You canFor a short time 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 Warranty certificate 11.1 Warranty general11.2 Warranty tank 11.3 ConditionsWarranty certificate 11.6 Claims11.7 Obligations 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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