Schneider Electric (Barber Colman) TC-5231 Thermostat

The Schneider Electric TC-5231 is a commercial-grade low temperature thermostat designed for high-performance freeze protection in AHU coils and heat exchangers. This single pole double throw (SPDT) controller features an adjustable 35°F to 60°F setpoint range and a 20-foot vapor-charged sensing capillary, making it ideal for monitoring temperatures across large coil faces. As the direct replacement for the legacy Barber Colman 2284-421, it integrates seamlessly into existing pneumatic or electronic control loops. The unit operates with auto reset logic, triggering when any one-foot section of the capillary detects a temperature drop below the setpoint. Built for versatility, it supports 24V to 277V electrical applications and includes essential mounting clips for precise bulb placement. Whether configured for freeze stat protection or low-limit alarm signaling, the TC-5231 provides the rugged reliability required for mission-critical HVACR infrastructure.

Key Benefits

• Direct Retrofit Compatibility: Engineered as the specific TC-5231 replacement for 2284-421, ensuring zero-overhead mechanical installation.
• Precise Freeze Protection: Features a 20' sensing element to detect localized "cold spots" that shorter capillaries might miss.
• Flexible Voltage Ratings: The SPDT switch handles universal voltages from 24 VAC through 277 VAC for industrial versatility.
• Automatic Reset Logic: Eliminates manual intervention by restoring standard operations once temperatures rise above the differential.

Common Questions

Is the TC-5231 suitable for outdoor air damper control?
Yes, it is frequently used to close outdoor air dampers or shut down fans when temperatures drop below the low limit thermostat setpoint to prevent coil rupture.

What is the difference between the Schneider TC-52xx series and manual reset models?
The TC-5231 is an auto reset freeze stat. If your local code or sequence of operations requires a manual lockout after a trip, you should specify the manual reset equivalent.

How do I install the 20' capillary for maximum accuracy?
The capillary should be serpentined across the downstream side of the coil using the included mounting clips to ensure any cold pocket triggers the freeze protection sequence.

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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.