Cleveland Controls DFSL-CO Switch

The Cleveland Controls DFSL-CO is a heavy-duty, factory-set air pressure sensing switch designed for reliable performance in duct heaters, ovens, and sophisticated energy management systems. As a veteran-preferred air flow proving switch, this non-adjustable unit is engineered to actuate at a precise fixed set point of 0.2" WC on a pressure rise. Its SPDT (Single Pole Double Throw) contact arrangement provides maximum flexibility, allowing for both normally open and normally closed circuit logic in critical safety interlocks or pilot duty applications. The robust plated housing protects a high-sensitivity silicone diaphragm, making it ideal for sensing positive, negative, or differential air pressure in harsh mechanical environments. With a 300 VA pilot duty electrical rating and 1/4-18 NPT high-pressure and 1/8-27 NPT low-pressure female connections, the Cleveland Controls DFSL-CO ensures a secure, leak-free installation for contractors maintaining mission-critical HVACR infrastructure.

• Factory-Calibrated Accuracy: Fixed at 0.2" WC (± 0.04" WC) for consistent activation without the need for field adjustment or recalibration.
• Versatile Media Compatibility: Proven to operate effectively with air and combustion by-products that are non-corrosive to silicone.
• Rugged Electrical Specs: Rated for 15 Amps non-inductive at up to 277 V ac, supporting various high-demand commercial control circuits.
• Secure Mounting: Features a 1" - 14 externally threaded connector and PAL nut for rigid surface mounting to flanges or pipe nipples.

Can the DFSL-CO be mounted in any orientation?
To maintain the specified 0.2" WC set point accuracy, the switch must be mounted with the diaphragm in a vertical plane. Avoid mounting with sample line connections facing upward to prevent moisture accumulation.

How do I plumb this for differential pressure sensing?
For differential sensing, connect the higher pressure source to the (H) 1/4" NPT inlet and the lower pressure source to the (L) 1/8" NPT inlet. The switch will actuate when the difference between these two points exceeds the set point.

Is this switch suitable for high-temperature applications?
The DFSL-CO is rated for an operating temperature range of -40°F to 180°F, making it suitable for standard HVAC environments and duct heater monitoring but not for direct exposure to high-heat oven interiors.

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.