Cleveland Controls AFS-298-112 Air Pressure Sensing Switch

The Cleveland Controls AFS-298-112 Air Pressure Sensing Switch is a versatile, high-performance adjustable differential pressure switch engineered for HVAC and energy management systems. This proving switch is designed to detect positive, negative, or differential air pressure across filters, coils, and fans. Working within a sensing range of 0.05" w.c. to 12.0" w.c., the AFS-298-112 features a durable plated housing and a silicone diaphragm compatible with air and combustion byproducts. For technicians, the SPDT snap-acting switch provides a reliable electrical interface across 120V-277VAC circuits, while the 1/2 PSI maximum pressure rating ensures stability in high-demand environments. The unit includes barbed sample line connections for quick integration with flexible tubing, making it a staple for field replacements and new installations where high set-point flexibility is required.

Key Benefits for Contactors

• Precise Field Calibration: The wide sensing range of 0.05" to 12" w.c. allows for fine-tuning via the internal calibration spring to meet specific airflow proving requirements.
• High Voltage Versatility: The SPDT snap-acting switch is rated for 120V to 277VAC, reducing the need to carry multiple SKUs for different control voltages.
• Robust Diaphragm Construction: Specifically designed for air or combustion gases, the silicone diaphragm maintains sensitivity without degrading in harsh HVAC mechanical environments.
• Simplified Installation: Standard barbed pressure connections and a compact plated housing allow for fast mounting in tight plenums or control cabinets.

Common Questions

Can the AFS-298-112 be used for both positive and negative pressure applications?
Yes, this differential air pressure switch is designed to monitor positive, negative, or differential pressure by utilizing the appropriate high and low-pressure ports.

What is the maximum pressure this switch can handle?
The unit is rated for a maximum pressure of 1/2 PSI (approximately 13.8" w.c.), making it ideal for standard commercial ductwork and air handling units.

Is this switch suitable for direct mounting on a burner?
As long as the combustion byproducts do not contain chemicals that degrade silicone, the AFS-298-112 is effective for monitoring burner fan performance and draft pressure.

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.