Manuals / A.O. Smith / Household Appliance / Water Heater

A.O. Smith 317443-000, 100 Power Vent DV Series 120 Troubleshooting, Installation Checklist

Models: 100 Power Vent DV Series 120 317443-000

1 60
Download 60 pages 2.15 Kb
Page 50
Image 50

troubleshooting

Installation Checklist

The list below represents some of the most critical installation requirements that, when overlooked, often result in operational problems, down time and needless parts replacement. This is not a complete list. Before performing any troubleshooting procedures use the list below to check for installation errors. Costs to correct installation errors are not covered under the limited warranty. Ensure all installation requirements and instructions in this manual have been maintained and followed.

Water Heater Location

1.Ensure proper clearances to combustibles are maintained and there is sufficient room to service the water heater.

2.Ensure the area is free of corrosive elements and flammable materials.

Venting

3.Ensure the intake air and/or vent (exhaust) piping is the correct size for the installed length.

4.Ensure the maximum equivalent feet of pipe has not been exceeded for the intake air and/or vent pipe.

5.Ensure the maximum number of elbows has not been exceeded in the intake air and/or vent pipe.

6.Ensure all exterior clearances for the intake air, vent and concentric terminations are maintained. These clearances and those cited by local and national codes must be maintained.

7.If venting “direct vent”, ensure the screen located in air intake at the water heater was removed.

Gas Supply And Piping

8.Ensure the supply gas line to each water heater meets the minimum supply gas line size requirements.

Condensate Drain

9.Ensure the condensate drain is properly connected to the exhaust elbow on the water heater with a water trap to prevent vent gases from escaping into the installed space and draining freely to a suitable floor drain.

Electrical Connections

10.Ensure the power supply connections to the water heater are polarity correct.

11.Ensure the water heater is properly grounded. Flame sensing requires an adequate earth ground. If the water heater is not properly grounded it will cause Ignition Failure.Sequence Of

Operation.

Installation Checklist

Read the Sequence of Operation below before attempting to correct any operational problems. See the Sequence Of Operation

Flow Chart.

1.When the control system is first powered, during boot up, it will display water heater model information during initialization. After a few moments the control system LCD which is part of the UIM (user interface module) will display the default screen known as the "Desktop" screen.

2.If the control system determines that the actual water temperature inside the tank is below the programmed Operating Set Point minus the Differential setting, a heating cycle is activated.

3.The control system then performs selected diagnostic system checks. This includes confirming the blocked exhaust, blocked intake and ECO (energy cut out) switch contacts are closed. The Blower Prover Switch contacts are confirmed open.

4.If all diagnostic checks are successfully passed, the control system energizes the Combustion Blower for pre-purge.

5.The control system must confirm the Blower Prover Switch contacts close after the Combustion Blower is energized.

6.If the Blower Prover Switch contacts are confirmed closed the control system energizes the Hot Surface Igniter for the igniter warm-up period.

7.The control system monitors the igniter current and must sense a minimum of 0.6 AC amps during the igniter warm up period (10 seconds).

8.If igniter amperage is confirmed at or above the required minimum the control system energizes the 24 V Gas Valve allowing gas to flow to the Main Burner.

9.The control system de-energizes the Hot Surface Igniter.

10.The control system monitors the flame sensor to confirm a flame is present at the Main Burner. If a flame is not verified during the ignition trial period the control system will try for ignition up to two more times. If flame can not be verified after three trials for ignition, the control system will lock out and display the “Ignition

Failure” Fault message.

11.If a flame is verified, the control system will enter the heating mode where it will continue heating the water until the Operating Set Point is reached. At this point, the control system will de- energize the 24 V Gas Valve and enter the post-purge cycle (approximately 30 seconds).

12.The Combustion Blower will run for the duration of the post- purge cycle to purge the water heater of all combustion gases. When the post-purge cycle is complete, the blower is de- energized and will coast to a stop.

13.The control system now enters the standby mode while continuing to monitor the internal storage tank water temperature and the state of other system devices. If the tank temperature drops below the Operating Set Point minus the Differential setting, the control will automatically return to Step 2 and repeat the operating cycle.

50

Page 49 Page 51
Page 50
Image 50
A.O. Smith 317443-000, 100 Power Vent DV Series 120 instruction manual Troubleshooting, Installation Checklist
Page 49 Page 51

100 Power Vent DV Series 120, 317443-000 specifications

The A.O. Smith 317443-000,100 Power Vent DV Series 120 is an advanced water heating solution designed to enhance efficiency and performance for residential applications. As part of A.O. Smith's renowned lineup, this model embodies the company's commitment to innovation and energy conservation.

One of the main features of the DV Series 120 is its power venting capability. This technology allows for flexible installation options, as it can vent vertically or horizontally, accommodating various home configurations. It utilizes a fan-assisted venting system, which efficiently expels exhaust gases, ensuring safe operation even in tight spaces.

The unit's energy efficiency is another standout characteristic. Equipped with a high-efficiency gas burner, the DV Series 120 optimizes fuel consumption, resulting in lower utility bills while providing reliable hot water when needed. Its impressive Energy Factor (EF) ratings make it an environmentally friendly choice, aligning with modern standards for green building practices.

Durability is also a significant focus of the A.O. Smith 317443-000,100 Power Vent model. Constructed with a glass-lined tank and a robust anode rod, this water heater is designed to resist corrosion and extend its lifespan. This construction enhances performance reliability while minimizing maintenance needs, making it a smart investment for homeowners.

Smart technologies are integrated into the DV Series 120, featuring an intelligent control system that provides various operational insights. The built-in diagnostic features allow homeowners to monitor performance and identify potential issues early, reducing the likelihood of unexpected failures. This control system can also enable more precise temperature management, enhancing both comfort and efficiency.

Safety is paramount in the design of the A.O. Smith 317443-000,100. The unit comes equipped with safety features such as a built-in flame rollout sensor and an automatic shut-off system to protect against potential hazards. These features ensure peace of mind for users, allowing them to confidently rely on their hot water supply.

In summary, the A.O. Smith 317443-000,100 Power Vent DV Series 120 stands out as a high-efficiency water heating solution, combining innovative venting technologies, durability, smart features, and safety mechanisms. This model is an ideal choice for homeowners seeking a reliable and efficient hot water system that meets modern energy standards.