Enviro-tec PE-09-6140 Limit Switch

The Enviro-tec PE-09-6140 is a high-limit thermal cutout switch designed to maintain system safety in Enviro-tec VAV boxes and fan coil units. This L140 cutout limit switch is engineered to open the electrical circuit when internal plenum temperatures reach 140°F, preventing heat damage to the motor and electrical components. For technicians performing HVAC limit switch replacement, this component ensures precise thermal monitoring and high-reliability performance in high-static environments. The PE-09-6140 limit switch is a standard safety control for commercial HVAC maintenance, offering a snap-action response to over-temperature conditions. It integrates seamlessly into the VAV unit safety circuit, ensuring HVAC system reliability by interrupting power to the heating elements or blower motor before a critical failure occurs. Utilizing OEM-spec materials, this thermal overload protector provides consistent trip points and long-term durability in demanding air distribution applications.

• Precise 140°F Cutout: Ensures HVAC high-limit protection by accurately detecting over-temperature conditions.
• OEM Compatibility: Specifically designed for Enviro-tec air handling units and terminal equipment.
• Manual/Automatic Reset Capabilities: Provides critical HVAC safety control to prevent unit overheating.
• Durable Construction: Engineered to withstand the constant thermal cycling found in commercial VAV systems.

Common Questions

Does this switch require a manual reset?
The PE-09-6140 is typically configured as a safety limit; check your specific unit wiring diagram to determine if it requires manual intervention after a trip event or if it resets automatically once temperatures drop below the 140°F threshold.

What causes this limit switch to trip frequently?
Frequent tripping usually indicates restricted airflow, often due to a dirty filter, a failing blower motor, or closed dampers, causing the plenum temperature to exceed the 140°F safety limit.

Can I use this as a universal HVAC limit switch?
While this functions as a 140-degree thermal switch, it is best practice to use it specifically for Enviro-tec equipment to ensure the mounting footprint and terminal connections match the original HVAC replacement parts specifications.

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.