
Automation Components Inc (ACI) FS-2 Freeze Stat
The Automation Components Inc (ACI) FS-2 Freeze Stat is a high-performance low temperature limit control designed to prevent costly damage to HVAC heating and cooling coils. This mechanical freeze protection device features a 20-foot vapor-filled capillary sensing element that triggers a protective response if any one-foot section of the tube detects temperatures below the user-defined setpoint. Engineered for reliability, the FS-2 model includes two SPDT relay outputs, allowing for simultaneous system shutdown and local alarm notification. This duct-mounted thermostat is essential for applications prone to air stratification or outdoor air infiltration. As a manual reset freeze stat, it ensures that technicians can a fully investigate the cause of a low-temperature trip before the system is re-engaged, providing an extra layer of safety for critical equipment. The rugged NEMA 1 HVAC safety switch enclosure is built for long-term service in commercial and industrial air handling units.
Key Benefits:
- Comprehensive Sensing: The 20-foot copper capillary responds to the lowest temperature sensed along any 12-inch segment for precise protection.
- Dual Control Logic: Equipped with two SPDT contacts (Form 1C) to manage both equipment power and building management system (BMS) alerts.
- Field Adjustable: Features a simplified adjustable setpoint range from 14°F to 54°F to suit specific environmental requirements.
- Manual Safety Lock: The manual reset button prevents automatic equipment restarts, ensuring a safe inspection after a freezing event.
- Durable Construction: Heavy-duty NEMA 1 metal housing with standard 1/2-inch conduit knockouts for easy electrical installation.
Common Questions:
What happens if only a small part of the capillary gets cold?
The ACI FS-2 is designed to actuate if any single foot of the 20-foot element reaches the setpoint temperature, ensuring protection even if most of the coil remains warm.
Where should the FS-2 be mounted for best results?
For optimal freeze protection, the sensing element should be installed in a serpentine pattern across the downstream side of the heating coil or the upstream side of the cooling coil.
Can I adjust the sensitivity or differential?
The trip point is adjustable via a slotted screw on top of the unit, while the switching differential is fixed at approximately 1.8°F to ensure consistent performance.
Disclaimer: 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.
This item is not eligible for free shipping.
Automation Components Inc (ACI) FS-2 Freeze Stat
The Automation Components Inc (ACI) FS-2 Freeze Stat is a high-performance low temperature limit control designed to prevent costly damage to HVAC heating and cooling coils. This mechanical freeze protection device features a 20-foot vapor-filled capillary sensing element that triggers a protective response if any one-foot section of the tube detects temperatures below the user-defined setpoint. Engineered for reliability, the FS-2 model includes two SPDT relay outputs, allowing for simultaneous system shutdown and local alarm notification. This duct-mounted thermostat is essential for applications prone to air stratification or outdoor air infiltration. As a manual reset freeze stat, it ensures that technicians can a fully investigate the cause of a low-temperature trip before the system is re-engaged, providing an extra layer of safety for critical equipment. The rugged NEMA 1 HVAC safety switch enclosure is built for long-term service in commercial and industrial air handling units.
Key Benefits:
- Comprehensive Sensing: The 20-foot copper capillary responds to the lowest temperature sensed along any 12-inch segment for precise protection.
- Dual Control Logic: Equipped with two SPDT contacts (Form 1C) to manage both equipment power and building management system (BMS) alerts.
- Field Adjustable: Features a simplified adjustable setpoint range from 14°F to 54°F to suit specific environmental requirements.
- Manual Safety Lock: The manual reset button prevents automatic equipment restarts, ensuring a safe inspection after a freezing event.
- Durable Construction: Heavy-duty NEMA 1 metal housing with standard 1/2-inch conduit knockouts for easy electrical installation.
Common Questions:
What happens if only a small part of the capillary gets cold?
The ACI FS-2 is designed to actuate if any single foot of the 20-foot element reaches the setpoint temperature, ensuring protection even if most of the coil remains warm.
Where should the FS-2 be mounted for best results?
For optimal freeze protection, the sensing element should be installed in a serpentine pattern across the downstream side of the heating coil or the upstream side of the cooling coil.
Can I adjust the sensitivity or differential?
The trip point is adjustable via a slotted screw on top of the unit, while the switching differential is fixed at approximately 1.8°F to ensure consistent performance.
Disclaimer: 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.
This item is not eligible for free shipping.
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Description
The Automation Components Inc (ACI) FS-2 Freeze Stat is a high-performance low temperature limit control designed to prevent costly damage to HVAC heating and cooling coils. This mechanical freeze protection device features a 20-foot vapor-filled capillary sensing element that triggers a protective response if any one-foot section of the tube detects temperatures below the user-defined setpoint. Engineered for reliability, the FS-2 model includes two SPDT relay outputs, allowing for simultaneous system shutdown and local alarm notification. This duct-mounted thermostat is essential for applications prone to air stratification or outdoor air infiltration. As a manual reset freeze stat, it ensures that technicians can a fully investigate the cause of a low-temperature trip before the system is re-engaged, providing an extra layer of safety for critical equipment. The rugged NEMA 1 HVAC safety switch enclosure is built for long-term service in commercial and industrial air handling units.
Key Benefits:
- Comprehensive Sensing: The 20-foot copper capillary responds to the lowest temperature sensed along any 12-inch segment for precise protection.
- Dual Control Logic: Equipped with two SPDT contacts (Form 1C) to manage both equipment power and building management system (BMS) alerts.
- Field Adjustable: Features a simplified adjustable setpoint range from 14°F to 54°F to suit specific environmental requirements.
- Manual Safety Lock: The manual reset button prevents automatic equipment restarts, ensuring a safe inspection after a freezing event.
- Durable Construction: Heavy-duty NEMA 1 metal housing with standard 1/2-inch conduit knockouts for easy electrical installation.
Common Questions:
What happens if only a small part of the capillary gets cold?
The ACI FS-2 is designed to actuate if any single foot of the 20-foot element reaches the setpoint temperature, ensuring protection even if most of the coil remains warm.
Where should the FS-2 be mounted for best results?
For optimal freeze protection, the sensing element should be installed in a serpentine pattern across the downstream side of the heating coil or the upstream side of the cooling coil.
Can I adjust the sensitivity or differential?
The trip point is adjustable via a slotted screw on top of the unit, while the switching differential is fixed at approximately 1.8°F to ensure consistent performance.
Disclaimer: 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.
This item is not eligible for free shipping.












