A.J. Antunes 8021206255 Pressure Switch

The A.J. Antunes 8021206255 Pressure Switch is a critical component for technicians requiring precise air differential pressure sensing in commercial HVACR applications. This SPDT air differential pressure switch features a versatile sensing range of 0.17 to 12 inches water column (WC), allowing for accurate monitoring of airflow and pressure drops across filters, coils, and fans. Engineered for durability, the Antunes 8021206255 includes a protective cover to shield the internal mechanisms from dust and debris in demanding mechanical rooms. When your HVAC pressure switch troubleshooting points to a faulty OEM part, this unit provides the direct electrical compatibility needed to maintain system safety interlocks and airflow verification. Its Single Pole Double Throw (SPDT) configuration facilitates flexible wiring for both normally open and normally closed circuits, ensuring seamless integration into existing control sequences for air handling units and exhaust systems.

Key Benefits for Contractors

• Wide Sensing Range: The 0.17-12" WC range covers a broad spectrum of commercial differential pressure switch applications, reducing the need for multiple stock parts.
• Field Reliability: Designed as an OEM pressure switch, it ensures exact fitment and calibration for equipment requiring A.J. Antunes 8021206255 specifications.
• Enhanced Protection: The included heavy-duty cover prevents accidental adjustment and environmental contamination of the electrical terminals.
• Versatile Signaling: The SPDT contact arrangement allows the switch to be used for both "high-limit" safety shutoffs and "low-limit" airflow proofing.

Common Questions

How do I adjust the setpoint on the Antunes 8021206255?
The setpoint is adjustable using the internal scale. Use a calibrated manometer to verify the trip point aligns with your system requirements, ensuring the pressure is within the 0.17 to 12 inches water column range.

Can this switch be used for liquid differential pressure?
No, this is specifically an air differential pressure switch. Exposure to liquid media will damage the diaphragm and internal electrical components.

What is the purpose of the SPDT contacts?
The Single Pole Double Throw configuration allows you to either make or break a circuit upon reaching the pressure setpoint, providing flexibility for alarm signals or equipment shutdowns.

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.