Cleveland Controls RFS-4001-110 Pressure Switch

The Cleveland Controls RFS-4001-110 Pressure Switch is a professional-grade air pressure sensing switch designed for proving airflow in commercial HVAC and energy management systems. This adjustable SPDT pressure switch features a versatile set point range from 0.15" w.c. ± .05" to 20.0" w.c., allowing for precise field calibration across high and low static pressure applications. Built with a durable plated housing and a silicone diaphragm, the RFS-4001-110 provides a reliable change-of-state on increasing pressure, supporting a maximum pressure rating of 1/2 psi. The unit includes a conduit enclosure with 1/2" knockouts to protect the internal snap-acting switch and screw terminals. Engineers and contractors utilize this differential pressure switch to sense positive, negative, or differential pressure in air handlers, furnaces, and ventilation equipment.

Key Benefits:

• Wide Adjustment Range: Field-adjustable from 0.15" to 20.0" w.c. for maximum application flexibility.
• Universal Sensing: Capable of monitoring positive, negative, or differential air pressure.
• Robust Electrical Rating: Features a 15-amp non-inductive SPDT contact arrangement for reliable control circuit integration.
• Secure Connections: Equipped with compression ferrule and nut sample line connections for 1/4" OD rigid tubing.
• Industrial Build: Zinc-plated strap bracket and protective cover designed for vibration-free vertical mounting.

Common Questions:

How do I adjust the set point on the RFS-4001-110?
To calibrate, turn the adjusting screw counterclockwise until it stops, then rotate clockwise 3.5 turns to engage the spring. Use a digital manometer to verify the exact switching point during the subsequent 4.5 turns of adjustment.

What is the proper mounting orientation for this switch?
The diaphragm must be mounted in any vertical plane to ensure the set point remains accurate. Avoid mounting with the sample line connections facing upward to prevent moisture or debris accumulation.

Can this switch handle non-corrosive combustion gases?
Yes, the Cleveland Controls RFS-4001-110 is suitable for sensing air and non-corrosive combustion byproducts, making it ideal for ventilation and combustion air proving.

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.