Aaon P80420 Pulley Els PW 17895 or positive pressure relative to

or positive pressure relative to atmosphere

Ensures proper combustion furnace venting by managing pre-purge and post-purge cycles

Designed to handle maximum hot junction temperatures up to 1500°F (816°C)

This thermostat is designed specifically for 1-heat/1-cool systems

15 inches of water column activation is mandatory to meet York OEM specifications and maintain safe combustion cycles

Aaon P80420 Pulley Els PW 17895 or positive pressure relative toThe Aaon P80420 Blower Wheel Pulley is a critical drive component engineered for high static pressure applications in HVAC blower motor assemblies. This BK series fixed bore pulley is designed to provide precise belt drive speed ratios for Aaon rooftop units and air handlers, ensuring optimal airflow and system static pressure management. Manufactured from high grade cast iron, the P80420 features a rugged construction that resists fatigue and wear