10 Maintenance

10.3Water-side maintenance

10.3.1Descale

Scaling depends on the water condition and the water demand. Besides, more scale deposit will be formed in the device at high temperatures. A temperature setting of 60 ºC is recommended to ensure low scale deposit. Descale using the appropriate agents. A descaling instruction is available for detailed information.

10.3.2Clean the condensation drainage

Regularly clean the condensation drainage and the siphon to avoid stoppage.

10.4 Gas-side

 

 

maintenance

10.4.1 Introduction

 

Proceed as follows for gas-side maintenance:

 

1.

Clean the burner.

 

2.

Clean the heat exchanger.

10.4.2 Clean the burner

1.

Dismount the burner.

2.

Remove the contamination present on the burner.

3.

Remount the burner.

10.4.3 Clean the heat exchanger

1.

Dismount the burner.

2.

Clean the combustion chamber of the heat exchanger using a vacuum

 

cleaner and a soft brush.

3.

Dismount the flue gas discharge.

4.

Clean the end of the heat exchanger using tap water.

5.

Remount the burner.

6.

Remount the flue gas discharge.

Remark

Check the pressure difference again after cleaning. Contact the supplier of the device if the pressure difference remains too low.

10.5 Complete

 

 

maintenance

Proceed as follows for completing the maintenance:

 

1.

Fill the device (5 “Fill”).

 

2.

Start up the device (7 “Start up”).

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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 Maintenance

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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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.

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