Enviro-tec M-21215-065 Switch

The Enviro-tec M-21215-065 is a high-capacity pneumatic-electric switch engineered specifically for heavy-duty commercial HVAC applications, including VAV terminal unit control and electric reheat sequencing. Operating at 277V with a robust 21-amp contact rating, this switch is designed to handle high-amperage electrical loads without the need for auxiliary contactors in many configurations. This specific model follows a compact profile without an external extension, making it an ideal fit for tight high-voltage control enclosures where clearance is at a premium. The integrated adjustable setpoint allows technicians to fine-tune the pneumatic-to-electric actuation threshold, ensuring precise synchronization between branch pressure and mechanical heating or cooling stages. Built for the rigors of field service, the M-21215-065 pneumatic switch provides a reliable interface between pneumatic control systems and electrical components, maintaining system pressure integrity while providing clean, snap-action switching for commercial HVAC maintenance and retrofit projects.

Key Benefits

• High Amperage Capacity: Rated for 21 amps at 277V, capable of direct-switching electric heat stages and heavy motor loads.
• Space-Efficient Design: The lack of an external extension simplifies installation in Enviro-tec VAV boxes and standard electrical brackets.
• Field Adjustability: Features an internal adjustment mechanism to calibrate the switch point according to specific pneumatic control sequences.
• Commercial Grade Durability: Constructed to withstand constant cycling in demanding HVACR environments, ensuring long-term operational stability.
• Universal Compatibility: Standard P/E switch design fits a wide range of Enviro-tec and legacy pneumatic-electric terminal configurations.

Common Questions

What is the primary application for the Enviro-tec M-21215-065?
This switch is typically used as a pneumatic-electric interface to energize electric heat coils or fan motors in VAV boxes when a specific pneumatic branch pressure is reached.

Can the setpoint be calibrated in the field?
Yes, this adjustable pneumatic switch allows for field calibration of the pressure actuation point to match the 3-15 psi or other common pneumatic control ranges.

Is this model a direct replacement for switches with extensions?
It serves the same electrical and pneumatic function, but since it lacks the extension, verify that your mounting bracket or enclosure depth supports the direct-mount configuration of the M-21215-065.

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.