Cleveland Control AFS-460-DSS Switch

The Cleveland Controls AFS-460-DSS is a precision-engineered differential air pressure switch designed for critical monitoring of positive, vacuum, or differential air pressure in HVAC systems and industrial process control. This high-capacity static pressure sensor features an adjustable set point range from 1.25" ± 0.06" to 12.0" w.c., making it a versatile component for confirming airflow or detecting filter blockage. Built for rigorous field use, the unit includes two SPST normally closed contacts and a manual reset mechanism, ensuring system safety by requiring technician intervention after a high-limit trip. Utilizing a 1/4" OD sample line connection, the AFS-460-DSS integrates seamlessly into existing pneumatic tubing runs. With a maximum pressure rating of 1/2 PSI, this switch is optimized for air-medium applications where accurate set point adjustment and mechanical reliability are non-negotiable for system performance and code compliance.

Key Benefits for Technicians

• Dual SPST Normally Closed Logic: Provides redundant safety switching, ideal for locking out burners or blowers during pressure loss.
• Wide Operating Range: The 1.25" to 12" w.c. range allows for precise field calibration across various ductwork configurations.
• Manual Reset Feature: Prevents automatic equipment restarts after a fault condition, ensuring the cause of the pressure drop is addressed.
• Rugged Housing: Engineered to withstand the vibrations and temperature fluctuations common in commercial mechanical rooms.
• Field-Proven Reliability: Industry-standard footprint allows for direct replacement of legacy Cleveland Controls air switches.

Common Questions for AFS-460-DSS

What is the primary application for the AFS-460-DSS in a commercial HVAC system?
This switch is typically used as a high-limit safety device to monitor air pressure in supply ducts or burner compartments. Its manual reset ensures that if pressure exceeds the set point, the system stays off until a technician inspects the airflow conditions.

Can this switch be used to monitor liquid or combustible gas pressure?
No. The AFS-460-DSS is specifically designed and rated for use with air and non-combustible gases only, with a maximum operating pressure of 0.5 PSI.

How do I connect the sample lines to this device?
The unit features standard 1/4" OD compression-style connections. For differential pressure monitoring, the higher pressure is piped to the 'High' port and the lower pressure to the 'Low' port.

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.