AFS-222 Cleveland Air Flow Switch

Overview

The Cleveland Controls Model AFS-222 is a general-purpose air pressure sensing switch designed for HVAC and energy management applications. It can be used to sense positive, negative, or differential air pressure, making it a reliable choice for proving airflow in building automation systems. The unit features a plated housing containing a silicone diaphragm, a calibration spring, and a snap-acting switch.

Features

• Field-adjustable set point range from 0.05 to 12.0 inches water column
• Snap-acting SPDT contact arrangement for versatile control and alarm wiring
• Enclosure cover that protects against accidental contact with live terminals and the adjusting screw
• Sample line connectors with integral compression ferrule and nut that accept 1/4-inch OD tubing
• Flexible mounting options allowing installation with the diaphragm in any vertical plane

Specifications

• Set Point Range: 0.05 to 12.0 inches W.C.
• Maximum Pressure: 0.5 PSI (0.03 bar)
• Operating Temperature Range: -40 to 180 degrees Fahrenheit (-40 to 82 degrees Celsius)
• Electrical Rating: 15 Amps non-inductive up to 277 VAC, 300 VA pilot duty
• Conduit Connection: 7/8-inch opening accepts 1/2-inch conduit
• Approvals: UL, FM, CSA

Applications

• Proving airflow across filters, fans, and coils in commercial HVAC systems
• Energy management and building automation monitoring
• Differential static air pressure sensing in ventilation ducts