{"product_id":"aci-a-fs-2-low-limit-freeze-stat-2-spdt-manual-reset","title":"Aci A\/FS-2 Low Limit Freeze Stat 2 Spdt Manual Reset","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ACI A\/FS-2 is a low-limit freeze protection thermostat designed to safeguard air handling units and HVAC systems against coil freeze-up and cold-air damage. It uses a 20-foot capillary sensing element that averages temperature across its full length, triggering shutdown before a freeze condition can damage equipment. On a trip event, the unit requires manual reset, giving the technician a clear indication that an abnormal condition occurred before the system is returned to service. Two sets of SPDT contacts provide output flexibility for controlling fans, dampers, or alarm circuits at 120 VAC or 240 VAC supply voltage.\u003c\/p\u003e\n\u003cp\u003eThe A\/FS-2 is suited for residential and light commercial air handling units, makeup air units, and rooftop equipment where freeze protection is required. The 20-foot capillary is routed across the face of a coil or across an air stream to detect any cold spot along its length. Licensed HVAC technicians install this device as part of a low-limit safety circuit, typically wired in series with the supply fan contactor or unit control board to shut down airflow on a freeze event.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e20-foot capillary sensor averages temperature across the full sensing length for broad coil coverage\u003c\/li\u003e\n  \u003cli\u003eManual reset operation flags freeze events and requires technician acknowledgment before restart\u003c\/li\u003e\n  \u003cli\u003eTwo sets of SPDT contacts allow simultaneous control of multiple outputs such as fan and damper or fan and alarm\u003c\/li\u003e\n  \u003cli\u003eCompatible with 120 VAC and 240 VAC supply circuits\u003c\/li\u003e\n  \u003cli\u003eMechanical display with no electronic components to fail in cold or wet environments\u003c\/li\u003e\n  \u003cli\u003eLow-limit type thermostat purpose-built for freeze protection applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or new-installation freeze stat for residential and commercial air handling units requiring a low-limit, manual-reset capillary thermostat with dual SPDT output contacts.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed HVAC technician. Disconnect and lock out all power to the air handling unit before wiring the thermostat contacts. Route the capillary element across the full face of the coil or air stream in a serpentine pattern without kinking or sharp bends. Verify supply voltage matches the unit rating and confirm contact wiring against the unit wiring diagram before restoring power.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType\u003c\/strong\u003e: Low Limit Freeze Thermostat\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Contacts\u003c\/strong\u003e: 2 Sets SPDT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSupply Voltage\u003c\/strong\u003e: 120 VAC, 240 VAC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCapillary Length\u003c\/strong\u003e: 20 feet\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReset Type\u003c\/strong\u003e: Manual\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDisplay Type\u003c\/strong\u003e: Mechanical\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: ACI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: A\/FS-2\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACI","offers":[{"title":"Default Title","offer_id":51284153794866,"sku":"A\/FS-2","price":291.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/309279020.jpg?v=1781069929","url":"https:\/\/voomisupply.com\/products\/aci-a-fs-2-low-limit-freeze-stat-2-spdt-manual-reset","provider":"Voomi Supply","version":"1.0","type":"link"}