Johnson Controls P32AF-5 Pressure Switch

The Johnson Controls P32AF-5 is a high-precision sensitive differential pressure switch engineered for air flow proving and pilot duty applications in commercial HVACR systems. This SPDT pressure switch features an adjustable setpoint range from 0.05" Wc to 5" Wc, making it ideal for monitoring velocity pressure or pressure drops across filters and coils. Functional for both differential pressure sensing and vacuum detection, the P32AF-5 utilizes a spring-loaded Buna-N diaphragm to actuate local or remote circuits. The integrated internal scale plate allows for field calibration, while its 1/4 HP electrical rating at 120/240 Vac ensures compatibility with standard control circuits. This unit is housed in a rugged NEMA 1 enclosure and comes standard with a universal mounting bracket for fast installation on ducts or flat surfaces. Note that the P32AF-5 is technically identical to the P32AF-5C model, ensuring seamless replacement in existing arrays.

Key Benefits

• Versatile Range: Adjustable setpoint from 0.05 to 5.0 inches Water Column covers a wide array of static pressure monitoring needs.
• Durable Construction: Features a high-quality Buna-N diaphragm and a NEMA 1 rated steel housing for reliable operation in technical environments.
• Simplified Calibration: The easy-to-read scale plate and accessible adjusting screw allow for precise field setpoint modifications.
• Multi-Mount Capability: Includes a mounting bracket for direct duct attachment or remote sensing via 1/4" tubing.
• Flexible Switching: The SPDT contact action (Single Pole Double Throw) provides both normally open and normally closed options for varied control logic.

Common Questions

Can the Johnson Controls P32AF-5 be used for clogged filter detection?
Yes, the P32AF-5 is commonly utilized for clogged filter detection by sensing the increase in pressure drop across the filter media as it becomes loaded with debris.

What is the difference between the P32AF-5 and P32AF-5C?
The units are identical in technical specifications, performance, and physical build. The "C" suffix typically denotes packaging for specific distribution channels but does not affect the P32 series specifications or compatibility.

Is this switch suitable for combustion air applications?
While the P32AF-5 is a differential pressure controller, specific combustion air applications may require specialized models. Always verify the required safety redundancy and local codes for burner air proving before installation.

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.