Cleveland Controls DDP-109-203M Pressure Switch

The Cleveland Controls DDP-109-203M is a professional-grade dual pressure switch engineered for precise air monitoring in high-demand HVAC and energy management systems. This unit features two independently adjustable SPDT snap-acting switches mounted on a single foot bracket, allowing technicians to establish a specific "deadband" or dual-actuation points for complex control circuits. With a differential pressure range typically spanning 0.05" to 2.0" w.c., this dual-element design is ideal for sensing pressure differentials across filters, coils, or blowers where separate high and low alarm or control thresholds are required.

Constructed with a durable silicone diaphragm and plated housing, the DDP-109-203M differential pressure switch ensures reliable performance in diverse industrial environments. The integrated 1/4" OD metallic tubing connections utilize compression ferrule and nut fittings for a secure, leak-proof interface. For contractors performing field startups, each switching element is fully adjustable via calibration springs, and the 300 VA pilot duty rating at 115-277 VAC provides the robust electrical capacity needed for standard air pressure sensing switch applications. This model is a direct solution for proving airflow and monitoring pressure sources simultaneously with a single, compact footprint.

• Dual Independent Set Points: Two separately operated SPDT switches allow for customized high/low limit control and versatile alarm configurations.
• Field Adjustable Range: Precise calibration between 0.05" and 2.0" w.c. to match specific system requirements.
• Robust Connectivity: All three sample connections (high and two low) accept standard 1/4" OD rigid or semi-rigid tubing for straightforward integration.
• Electrical Versatility: High-capacity 15A non-inductive rating and 300 VA pilot duty support most commercial HVAC control boards.
• Protective Enclosure: Includes covers to protect live switch terminal screws and set point adjustments from accidental contact.

How do I set the deadband on the DDP-109-203M?
Since the two snap switches function independently, you establish the deadband by calibrating switching element A for your low set point and element B for your high set point. Use a digital manometer during the adjustment of the calibration springs to ensure accuracy.

What media is this pressure switch compatible with?
The unit is designed for use with air and inert dry gases. It is not intended for use with combustible gases or liquids.

Can this switch be mounted in any orientation?
For optimal accuracy and to maintain the lowest specified set points, the diaphragm must be mounted in a vertical plane. Avoid mounting with the sample line connections facing upward to prevent moisture or debris accumulation.

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.