NBK 20835 (520814) Suburban Water Heater Igniter Control Board - 12V DC

This direct spark ignition (DSI) water heater control board is designed to manage and regulate the heating process within a Suburban RV water heater. It serves as the central processing unit, orchestrating the sequence of operations necessary for the efficient production of hot water. This includes monitoring water temperature, controlling the gas flow, and managing the ignition process. The control board is equipped with sensors and circuitry that enable it to make real-time decisions for initiating the heating cycle, ensuring safety, and optimizing fuel consumption. Its primary goal is to provide a seamless operation that maintains the desired water temperature, while incorporating safety features to prevent overheating and potential damage to the system.

Upon a demand for hot water, the control board activates the ignition sequence. This involves sending a signal to the electrode, which then produces a high-voltage spark. This spark is essential for igniting the gas in the burner assembly, creating the flame that heats the water. The electrode not only initiates the ignition but also plays a role in detecting the presence of the flame. If the flame is not detected, the control board will attempt to reignite the flame by repeating the ignition sequence. This safety feature ensures that gas is not wasted and minimizes the risk of gas accumulation, enhancing the system's efficiency and safety.

In addition to managing the ignition process, the control board's connection to the gas valve regulates the opening and closing of the gas valve based on the system's operational status and the need for heat. When the water temperature drops below the set point, the control board signals the gas valve to open, allowing gas to flow to the burner where it can be ignited. Conversely, once the desired temperature is reached, the control board instructs the gas valve to close, halting the flow of gas and thereby extinguishing the flame. This regulation of the gas valve not only ensures efficient fuel use but also plays a crucial role in the safety of the system, preventing gas leaks and reducing the risk of fire.