Cleveland Controls AFS-460-137 Switch

The Cleveland Controls AFS-460-137 is a reliable, field-adjustable differential air pressure switch designed for HVAC airflow proving and energy management applications. This manual reset pressure switch is essential for systems requiring a lockout feature that necessitates technician intervention after a set point violation. It features a broad adjustable set point range from 0.40" ± 0.06" w.c. to 12.0" w.c., allowing for precise calibration across diverse static or differential pressure requirements. The unit is equipped with a DPDT contact arrangement (two form-C 8-amp contacts), providing the flexibility to control multiple circuits, such as simultaneous fan interlocking and remote alarm signaling. Built with a durable silicone diaphragm, the AFS-460-137 is compatible with air and combustion by-products that do not degrade silicone. Its plated housing includes integrated 1/4" OD compression fittings and a 1/2" conduit connection, ensuring a secure, professional installation in any vertical plane to maintain accuracy.

• Manual Reset Security: Ensures equipment safety by requiring manual intervention before restarting after a pressure trip.
• DPDT Contact Versatility: Dual-pole, double-throw relay supports complex control logic and auxiliary status monitoring.
• Wide Adjustment Range: Handles everything from 0.40" to 12.0" w.c., making it a universal choice for high-pressure industrial and commercial ductwork.
• Rugged Construction: Plated metal housing and silicone sensing element withstand demanding HVAC environments up to 180°F.
• Easy Integration: Integral compression ferrule and nut connections accept standard 1/4" OD rigid or semi-rigid tubing.

How do I calibrate the set point?
Calibration should be performed using a digital manometer. Turn the adjustment screw clockwise to increase the pressure set point or counter-clockwise to decrease it, noting that each full turn represents approximately 1.16" w.c.

Can I mount this switch in any orientation?
To maintain the lowest specified operating set point and accuracy, the switch must be mounted with the diaphragm in a vertical plane. Avoid mounting with the sample line connections facing upward to prevent moisture accumulation.

What is the maximum pressure rating?
The Cleveland Controls AFS-460-137 is rated for a maximum pressure of 0.5 psi (13.85" w.c.). Exceeding this limit may damage the silicone diaphragm or internal calibration spring.

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.