For contractors servicing VAV systems, the KMC Controls CSC-2004 is the industry-standard pneumatic reset volume controller engineered for reverse acting (RA) and normally closed (NC) terminal units. This sub-master controller is the direct replacement for legacy 2326-022 and 2326-028 models, allowing you to restore precise air velocity regulation without complex retrofitting. Formulated for high-performance HVAC pneumatic control, it utilizes a differential-pressure sensing element to manage airflow between calibrated minimum and maximum airflow settings. The 14.4 SCIM air consumption rate at 20 PSIG ensures efficient operation within a 15 to 30 PSIG main air pressure range. Housed in a durable grey ABS casing, this unit maintains setpoint accuracy even in demanding environments, making it a critical component for VAV terminal unit optimization and industrial airflow pressure control. Key Benefits Direct Retrofit Compatibility: Seamlessly replaces 2326-022 and 2326-028 units, reducing downtime during field service. Precise Velocity Control: Features independent adjustment knobs for LO and HI limit settings to match specific zone requirements. N.C. System Integration: Specifically designed for normally closed VAV terminal units requiring a reverse acting signal. Pneumatic Efficiency: Low air consumption (14.4 SCIM) minimizes the load on the main air supply. Standardized Installation: Includes a factory-installed mounting bracket and universal 1/4 inch OD tubing connections. Common Questions Is the KMC CSC-2004 compatible with direct acting thermostats? The CSC-2004 is designed for reverse acting cooling applications. For heating sequences, it often interfaces with a direct acting thermostat depending on the damper configuration. Does this unit require specific calibration equipment? Yes, for maximum accuracy, all CSC-2000 series controllers should be calibrated using airflow measuring equipment to ensure the setpoints align with the actual field CFM. What is the difference between the CSC-2004 and CSC-2002? While both are reverse acting, the CSC-2004 features a paper label dial for blind adjustments, whereas the CSC-2002 includes a molded 0-10 reference dial. Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
