{"product_id":"johnson-controls-afs-262-air-flow-switch","title":"Johnson Controls AFS-262 Air Flow Switch","description":"\u003cp\u003eThe \u003cstrong\u003eJohnson Controls AFS-262 Air Flow Switch\u003c\/strong\u003e is a heavy-duty, general-purpose \u003cstrong\u003edifferential pressure sensing switch\u003c\/strong\u003e designed for critical HVAC and Energy Management applications. This field-adjustable unit allows contractors to establish precise \u003cstrong\u003eair pressure proving\u003c\/strong\u003e within a range of \u003cstrong\u003e0.05 to 2.0 inches WC\u003c\/strong\u003e, making it a versatile solution for monitoring positive, negative, or differential pressure across coils, filters, and fans. Housed in a durable plated casing, the internal silicone diaphragm and snap-acting \u003cstrong\u003eSPDT (Single Pole Double Throw)\u003c\/strong\u003e switch ensure reliable performance even when exposed to air or combustion by-products. The AFS-262 features \u003cstrong\u003e1\/4 inch OD metallic tubing\u003c\/strong\u003e connections equipped with integral compression ferrules and nuts for a secure, leak-proof fit. For optimal sensitivity and to achieve the lowest specified set point, the device must be installed with the \u003cstrong\u003ediaphragm in a vertical plane\u003c\/strong\u003e. The enclosure includes 1\/2 inch conduit access to protect the screw-type terminals, supporting seamless integration into industrial control loops or alarm circuits.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdjustable Set Point Range:\u003c\/strong\u003e Offers a field-calibrated range from 0.05 to 2.0 inches WC for precise \u003cstrong\u003eHVAC airflow monitoring\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Sensing Capabilities:\u003c\/strong\u003e Engineered to accurately detect \u003cstrong\u003edifferential pressure\u003c\/strong\u003e, positive pressure, or static negative pressure.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRugged Component Design:\u003c\/strong\u003e Features a silicone diaphragm and a plated housing rated for 100,000 cycles at maximum electrical load.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandardized Connections:\u003c\/strong\u003e Utilizes 1\/4 inch OD compression fittings and 1\/2 inch conduit openings for straightforward technician field installation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Electrical Capacity:\u003c\/strong\u003e SPDT contacts rated for 15 amps non-inductive at 277 VAC, suitable for various pilot duty and control applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I change the set point on the AFS-262?\u003c\/strong\u003e\u003cbr\u003e\nThe set point is adjusted by turning the internal calibration screw. To ensure accuracy for \u003cstrong\u003epressure switch calibration\u003c\/strong\u003e, use a digital manometer while adjusting the screw (clockwise to increase, counter-clockwise to decrease) to match the required system inches of water column.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the proper mounting orientation for this switch?\u003c\/strong\u003e\u003cbr\u003e\nFor \u003cstrong\u003eAFS-262 installation\u003c\/strong\u003e, the unit must be mounted vertically. This prevents the weight of the diaphragm from affecting the set point, ensuring the switch trips at the calibrated pressure differential.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan this be used for combustion air proving?\u003c\/strong\u003e\u003cbr\u003e\nYes, the AFS-262 is rated for air and combustion by-products that do not degrade silicone, making it suitable for \u003cstrong\u003edraft proving\u003c\/strong\u003e in furnace and boiler applications.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: 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.\u003c\/p\u003e","brand":"Johnson Controls","offers":[{"title":"Default Title","offer_id":35645173516,"sku":"AFS-262","price":93.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Image_58f189f2-efe0-4c16-803f-58477afbe4f1.png?v=1791397088","url":"https:\/\/www.gsistore.com\/en-ca\/products\/johnson-controls-afs-262-air-flow-switch","provider":"GSIstore","version":"1.0","type":"link"}