Engineered for Aaon rooftop units and air handlers

ensuring downstream tools and valves receive consistent air volume under load

you should adjust the air pressure to match your boiler fill valve setting (typically 12–15 PSI) while the tank is empty or isolated from system pressure

press the small center button between the terminals until it clicks

maintaining precise valve positioning and shut-off capability

Carrier 00PPG000492100A Pressure Switch 30067439-890 Engineered for Aaon rooftop unitsThe Carrier 00PPG000492100A Pressure Switch is a mission critical OEM replacement part designed for precision pressure monitoring within Carrier, Bryant, and Payne HVAC systems. This switch is calibrated for a 160 In cut in and 204 Out cut out profile, ensuring the inducer motor or refrigerant circuit maintains exact operational safety limits. As the direct cross reference for the obsolete 00PPG000453600A and a replacement for HK02ZA440, it offers