Cleveland Controls DDP-106-256 Switch

The Cleveland Controls DDP-106-256 is a heavy-duty dual switch air flow switch engineered for precise differential pressure monitoring in HVAC and energy management systems. Unlike standard single-point sensors, this unit features two independently adjustable SPDT snap-acting switches mounted on a robust common bracket. This configuration allows field technicians to establish a customized deadband, providing both high and low actuation points for complex control and alarm sequences. Each switch assembly operates with its own diaphragm and calibration spring, utilizing a shared high-pressure sample connection and two individual low-pressure ports to streamline multi-point sensing without the need for additional manifolding.

Designed for professional-grade reliability, the DDP-106-256 supports differential pressure ranges up to 2.0 inches w.c. and is rated for 100,000 cycles at maximum electrical load. The plated housings ensure durability in mechanical environments, while the 1/4 inch OD compression fittings provide secure attachments for rigid or semi-rigid tubing. For accurate set point performance, ensure the device is mounted with the diaphragms in a vertical plane. This part is a direct solution for contractors requiring precise fan proving and filter status monitoring where redundant or staged switching logic is essential.

• Dual Independent Set Points: Two separate SPDT switches allow for nuanced control logic, such as high-limit alarm and low-limit fan proving from a single device.
• Field-Adjustable Range: Easily calibrate the operate range from 0.07" w.c. to 2.0" w.c. to match specific system requirements.
• Industrial Build Quality: Plated housings and 1/4 inch compression ferrule fittings provide a leak-proof, long-lasting interface for metallic or plastic tubing.
• High Electrical Capacity: Rated for 15A non-inductive at 277 VAC, making it compatible with a wide array of pilot duty and motor control circuits.
• Simplified Installation: A common foot bracket reduces mounting footprint and simplifies the high-pressure tubing layout.

What is the proper mounting orientation for the DDP-106-256?
To maintain the specified sensitivity and accuracy, the switch must be mounted with the diaphragm in a vertical plane. Installing it horizontally will cause a shift in the set point due to the weight of the internal components.

Can I use flexible plastic tubing with this switch?
The integrated 1/4 inch OD compression fittings are designed for rigid or semi-rigid tubing. If using flexible slip-on tubing, compatible adapters are required to ensure a pressure-tight connection.

How do I set the deadband?
Since each switch (Element A and B) is adjusted independently via its own calibration screw, you can set "Switch A" to actuate at your lower pressure limit and "Switch B" at your higher limit, creating a custom operational window for your control circuit.

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.