This SPNO (Single-Pole Normally Open) control is calibrated with two distinct setpoints:

Hydrolevel specifically recommends against using heat-conducting grease

Superior Miscibility: Maintains a homogeneous solution with R-22 refrigerant across wide temperature ranges for reliable oil return to the crankcase

30" WC SPST Pressure Switch is set to trigger at 2

Integrated Igniter: Includes a high-durability igniter lead designed for consistent sparking and rapid flame rectification

Cleveland Controls DDP-106-256 Switch Els PW 17895 This SPNO (Single-Pole Normally Open)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