Model AFS-222, AFS-262, and AFS-460 Differential Pressure Switches are general-purpose, airflow-proving switches designed for HVAC and building automation applications. They may be used to sense positive, negative, or differential air pressure. The plated housing contains a diaphragm, calibration spring, and snap-acting switch (or switches). The pressure connections located on each side of the diaphragm accept 1/4" OD tubing via the integral compression ferrule and nut. An enclosure cover guards against accidental contact with the live-switch terminal screws and the set point-adjusting screw. The enclosure will accept a 1/2" conduit connection. FEATURES Two-year warranty Adjustable set point Knockout for 1/2" conduit Enclosed terminals SPECIFICATIONS Set point range AFS-222 0.05" W.C. to 12.0" W.C. (12.5 to 2989 Pa) AFS-262 0.05" W.C. to 2.0" W.C. (12.5 to 498 Pa) AFS-460 0.4" W.C. to 12.0" W.C. (99 to 2989 Pa) AFS-460-DSS 2.0" W.C. to 12.0" W.C. (498 to 2989 Pa) Switch differential (AFS-222, -262 only) Progressive, increasing from approximately 0.02" W.C. (5.0 Pa) @ min setpoint to approximately 0.8" W.C. (199.3 Pa) @ max setpoint Contacts AFS-222, -262 SPDT AFS-460 SPST N.C. AFS-460-DSS 2 SPST N.C. Electrical rating AFS-222, -262 300 VA pilot duty @ 115-277 VAC, 15A noninductive 277 VAC, 60 Hz 24 VAC @ 2.4A AFS-460, -460-DSS 15A @ 125-277 VAC 1/4 HP @ 125 VAC 1/2 HP @ 250 VAC 1/2A @ 125 VDC Max overpressure 0.5 psig (3.45 kPa) Operating temp -40 to 18 F (-40 to 82 C) Pressure line connection Ferrule and nut compression for 1/4" OD tubing Electrical connections Terminals Approval/Recognition UL, FM, CSA, CE Weight 2.0 (0.91 kg) Life AFS-222, -262 100,000 cycles minimum @ max overpressure and max electrical load AFS-460, -460-DSS 6,000 cycles minimum @ max overpressure and max electrical load