ACI A/FS Sensor Accessory

The FS Series controllers are Low Limit controllers also known as "Freeze Stats". These devices were designed for use on HVAC equipment requiring low-temperature cutout protection and in all ducts to prevent the cooling coils from freezing. The Freeze Stats should be mounted between the heating and cooling coils on the supply side of the fan unit. The FS-1, FS-3 and FS-5 are available in both manual and automatic reset versions. These units are responsive to the lowest temperature sensed along any 1 foot section of the sensing element. They also have (one) set of SPDT contacts with an adjustable setpoint range of 14 to 54ºF. The sensing element is made up of a vapor-filled, copper capillary tube measuring 5/64 inches in diameter (2mm) with an overall length of 6, 10, and 20 feet depending on the model number being ordered. The FS-2, FS-4, and FS-6 are available in both manual and automatic reset versions. These units are responsive to the lowest temperature sensed along any 1 foot section of the sensing element. The FS-2, FS-4, and FS-6 model number each have (2) sets of SPDT contacts with an adjustable setpoint range of 14 to 54ºF. The sensing element is made up of a vapor-filled, copper capillary tube measuring 5/64 inches (2mm) in diameter with an overall length of 6, 10, or 20 feet depending on the model number being ordered.

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