Cleveland Controls RFS-4001 Pressure Switch

The Cleveland Controls RFS-4001 Pressure Switch is a high-performance airflow proving switch engineered for precision in HVAC and Energy Management systems. Built with a rugged plated housing, this differential air pressure switch utilizes a silicone diaphragm and a snap-acting SPDT switch to monitor air velocity and pressure drops across filters or coils. It features a broad adjustable set point range from 0.17" w.c. to 2.0" w.c., allowing technicians to fine-tune pressure switch calibration for specific field requirements. The unit supports up to 1/2 PSI maximum pressure and operates reliably on 277Vac electrical circuits. Designed for versatile mounting, the RFS-4001 must be installed with the diaphragm in a vertical plane to maintain accuracy. The integrated 1/4" OD compression fittings ensure secure tubing connections, while the protective enclosure cover with 1/2" conduit knockouts simplifies wire management and enhances safety on the job site.

• Precise Field Calibration: Easily adjustable set point range from 0.17" to 2.0" w.c. for exact system air proving.
• Universal Sensing: Capable of sensing positive, negative, or differential pressure for various duct configurations.
• Industrial Durability: Plated steel housing and a high-cycle snap-acting switch offer longevity in demanding commercial environments.
• Installation Flexibility: Compact footprint with multiple mounting slots and 1/2" conduit knockouts for rapid field deployment.
• High Electrical Capacity: Rated for up to 15A non-inductive at 277Vac, making it compatible with most standard control circuits.

How do I calibrate the set point?
To adjust the trip point, turn the internal calibration screw. Use a digital manometer to verify the exact pressure at which the contacts change state on increasing pressure.

Can this be used for both positive and negative pressure?
Yes. Connect to the 'H' port for positive pressure sensing, the 'L' port for negative pressure, or both for differential air pressure measurements.

What is the proper mounting orientation?
For peak accuracy, mount the switch with the diaphragm in a vertical plane. Avoid mounting with the sample line connections pointing upward to prevent moisture accumulation.

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.