Lochinvar & A.O. Smith 100166230 - SPDT Pressure Switch, 1.35" WC

Maintaining precise combustion airflow is critical for efficient boiler operation, and the 100166230 SPDT pressure switch from Lochinvar provides the necessary detection to keep systems running within safe parameters. Designed for compatibility with both Lochinvar and A.O. Smith units, this air proving switch acts as a safeguard by verifying airflow before the ignition sequence initiates. By installing the 100166230, technicians ensure that draft requirements are met consistently across high-demand hydronic applications.

This pressure switch operates on a Single Pole Double Throw (SPDT) configuration, reacting to differential pressure changes within the combustion air intake or vent system. When the internal diaphragm detects the calibrated 1.35"wc threshold, it mechanically shifts the switch position, signaling the boiler control board that sufficient airflow is present for safe fuel combustion.

Key System Performance Baselines:

• Calibration Setpoint: Factory calibrated at 1.35"wc for precise air proving.
• Switch Configuration: Single Pole Double Throw (SPDT) functionality for versatile circuit integration.
• Safety Interlock: Monitors negative or positive pressure to prevent firing during blocked vent or blower failure conditions.

⚠️ Application Profile: Specifically engineered for commercial boiler combustion air proving, vent pressure monitoring, and blower intake verification in Lochinvar and A.O. Smith hydronic heating systems.

📋 Procurement & Shipping Notice

• LTL Freight Dispatch: Heavy commercial units ship directly via insured LTL carrier with delivery coordination included.
• Project Timelines & Submittals: Need guaranteed delivery dates, formal submittals, or tax-exempt processing?

👉 Request a Commercial Quote or contact our procurement team for direct freight scheduling.