Sequence Of Operation Flow Chart

If tank temperature drops below Operating Set Point minus

Differential setting a heating cycle is activated

 

Control System performs diagnostic checks

 

 

 

 

 

 

Control System Locks Out

Normal State of all pressure switches and ECO are checked

 

 

 

 

 

 

NO

 

 

 

Blower Prover pressure switch verified open

 

 

 

 

 

Displays Fault Msg

 

 

 

 

 

 

 

All other pressure switches and ECO are verified closed

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Combustion Blower is energized

 

 

 

 

 

 

 

 

 

 

 

Pre-Purge cycle

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Control System Locks Out

 

 

Blower Prover switch contacts confirmed

 

 

 

 

 

 

 

 

 

 

NO

 

 

 

 

“Blower Prover Open”

 

 

closed by control system

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fault Msg is displayed

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Igniter is energized for warm up period

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Does Control System sense minimum

 

 

 

NO

Igniter amps?

 

 

 

 

 

 

 

 

 

 

 

24 V Gas Valve is energized gas flows to Main Burner

Is flame sensed at the Main Burner?

(control system monitors the flame sensor)

YESNO

Control System Locks Out “Low Igniter Current” Fault Msg is displayed

0.6 minimum AC amps

Water is heated to

set point

24 V Gas Valve

de-energized

Approximately

30second

Post-Purge cycle

Water heater goes into standby mode

24 V Gas Valve de-energized

Approximately

30second

Inter-Purge cycle

Retries up to two more times

Control System

Locks Out

“Ignition Failure”

Fault Msg is

displayed

Figure 39.

51

Page 51
Image 51
A.O. Smith 100 Power Vent DV Series 120, 317443-000 instruction manual Sequence Of Operation Flow Chart, YES no

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.