Reznor 126170 Freezstat

The Reznor 126170 Freezstat is a heavy-duty, field-mounted freeze protection thermostat designed to prevent coil freeze-up in commercial and industrial HVAC systems. This genuine Reznor OEM replacement part (model A19AAF-12C) features a wide temperature range of 25°F to 225°F, making it versatile enough for use as an outside air controller or a high ambient limit switch. The 10-foot capillary tube allows for precise sensing in blower discharge ducts, providing critical safety data to your control circuit.

Equipped with SPDT (Single Pole Double Throw) switching, the 126170 freezstat offers professional-grade reliability for managing makeup air heating systems. The 3.5°F fixed differential ensures stable operation without rapid cycling, protecting expensive coils from rupture. Built for rugged environments, this low limit switch monitors ambient conditions to trigger safety signals or shut down fans when temperatures drop below the setpoint. It is compatible with various Reznor unit heaters and direct-fired systems, ensuring seamless integration into your current HVAC control wiring.

• Versatile Range: Operates between 25°F and 225°F for multifaceted limit safety control.
• Precision Sensing: 10-foot capillary sensor provides flexible mounting options for accurate air temperature monitoring.
• SPDT Logic: Reliable switching for both normally open and normally closed safety circuits.
• Industrial Durability: Genuine Reznor component engineered for commercial HVAC maintenance.

Is the differential adjustable on this model?
No, the Reznor 126170 features a factory-set 3.5°F fixed differential to maintain consistent safety parameters without manual interference.

Where should the sensing bulb be mounted?
For low limit freeze protection, the capillary bulb is typically field-mounted in the blower discharge duct or across the face of the coil to detect cold air pockets.

Can this part replace a high-limit controller?
Yes, due to its high-end range of 225°F, this SPDT thermostat can function as a high-limit safety cut-out in compatible heating applications.

This item is not eligible for free shipping.

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.