KMC CONTROLS

The KMC Controls 2000 Series and 3000 Series reset volume controllers differ primarily in their reset start point ranges and setpoint adjustability. The 2000 Series models have reset start point ranges of either 3 to 8 psi or 8 to 13 psi, depending on the model, and are available in direct-acting or reverse-acting configurations with normally open or normally closed operation. The 3000 Series models offer a wider reset start point range of 0 to 10 psi and may have a maximum setpoint range of up to 2 in wc. Both series are used in HVAC systems to reset airflow setpoints based on duct static pressure. The 3000 Series often provides more flexibility in tuning the reset function. When selecting, consider the required reset start point and setpoint range for your specific application.

A reset volume controller, such as those in the KMC Controls 2000 and 3000 Series, is used in variable air volume (VAV) systems to adjust the airflow setpoint based on a reset signal, typically from a duct static pressure sensor. It receives a pneumatic signal and modulates the airflow damper or valve to maintain the desired volume. The reset function allows the controller to change the setpoint in response to system demand, improving energy efficiency and maintaining comfort. These controllers are commonly used in commercial buildings to control VAV terminal units. They require a clean, dry compressed air supply and are compatible with pneumatic actuators. The KMC Controls reset volume controllers are available in direct-acting or reverse-acting modes to suit different damper configurations.

KMC Controls reset volume controllers, such as the 2000 and 3000 Series, typically have a minimum setpoint range of 0 to 1 in wc or 0 to 2 in wc, and a maximum setpoint range of Min + 1 in wc or Min to 2 in wc. Reset start point ranges vary: 3 to 8 psi or 8 to 13 psi for the 2000 Series, and 0 to 10 psi for the 3000 Series. They are available in direct-acting or reverse-acting configurations, with normally open or normally closed operation. The controllers are designed for pneumatic control systems and require a supply pressure, often 20 psi. They include mounting brackets and have a weight of approximately 0.69 lb. For detailed specifications, refer to the individual product data sheets.

To select the correct KMC Controls reset volume controller, first determine the required action: direct-acting or reverse-acting, and whether normally open or normally closed operation is needed. Next, identify the required setpoint range (e.g., 0 to 1 in wc or 0 to 2 in wc) and the reset start point range (e.g., 3 to 8 psi, 8 to 13 psi, or 0 to 10 psi). Consider the available pneumatic supply pressure and the compatibility with your existing actuators and sensors. The KMC Controls 2000 Series offers models with fixed reset start points, while the 3000 Series provides a wider adjustable range. If you need assistance, 3G Electric can help match the model to your specifications based on the product data.

In KMC Controls reset volume controllers, direct-acting and reverse-acting refer to how the controller responds to changes in the input signal. A direct-acting controller increases its output pressure as the input signal increases, while a reverse-acting controller decreases its output pressure as the input signal increases. This action determines how the controller modulates the damper or valve in response to duct static pressure changes. The choice between direct and reverse acting depends on the specific HVAC system design and the desired control sequence. KMC Controls offers both types in the 2000 and 3000 Series, often with configurable normally open or normally closed operation. Always verify the required action for your application.

3G Electric supplies KMC Controls products, including reset volume controllers and other HVAC control components, to customers worldwide. The company maintains a catalog of KMC Controls SKUs with detailed specifications, such as type, series, setpoint ranges, and manufacturer part numbers, to facilitate selection. 3G Electric provides logistics and order fulfillment, ensuring that products are shipped efficiently. For technical questions or application support, customers can contact 3G Electric's team, which can assist with product identification, availability, and order processing. 3G Electric does not manufacture KMC Controls products but distributes them as part of its industrial equipment portfolio. All products are genuine KMC Controls items, sourced through authorized channels.