KMC Controls CTE-3007 Control

The KMC Controls CTE-3007 is a mission-critical manual reset low limit control engineered for freeze protection in commercial HVACR systems. As a SPDT snap-acting freeze stat, it provides reliable low temperature cutout and signaling for heating coils and cooling coils. The unit features a 20-foot vapor-filled capillary element designed to respond to the lowest temperature sensed along any one-foot section, making it indispensable for stratified airstream applications. With a fixed differential of 4.5??F and an adjustable setpoint range of 35?? to 68??F, this HVAC freeze protection switch ensures plant safety by requiring a physical intervention via the manual reset button once temperatures rise at least 5??F above the setpoint. A built-in manual test lever allows for rapid field verification during startup or routine maintenance. The rugged plated steel case and SPDT switching capability facilitate seamless integration into safety interlock circuits and BAS monitoring systems.

• Fail-Safe Protection: The manual reset functionality ensures an operator inspects the system before resuming airflow, preventing damage from repeated freeze-thaw cycles.
• Responsive Sensing: The 20-foot sensing element captures the coldest point in the coil, providing superior freeze stat coverage compared to shorter probes.
• Installation Flexibility: A setpoint visible through the cover and top-access adjustment screws simplify field calibration for various duct configurations.
• Heavy-Duty Contact Rating: Supports inductive loads up to 24 FLA at 120/240 VAC, suitable for direct fan motor or damper actuator control.

How do I test the CTE-3007 during a PM inspection?
Use the manual test lever located beneath the cover. This allows you to simulate a trip without needing to chill the capillary element, verifying that the SPDT contacts and safety circuit are functioning correctly.

Why won't my freeze stat reset even after the space has warmed up?
The CTE-3007 requires the sensed temperature at the low limit control to be at least 5??F (2.8??C) above your setpoint before the reset button becomes active. Ensure there are no regional cold spots remaining on the 20-foot capillary.

What mounting orientation is recommended for the capillary?
For maximum HVAC equipment safety, install the capillary in a horizontal serpentine pattern across the downstream side of the coil using capillary-mounting clips to prevent vibration fatigue.

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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.