Navien 30000663A - Air Pressure Flow Sensor (APS) The Navien 30000663A is a genuine OEM air pressure sensor (APS), also known by part number NASS9EX00009. It is designed for use in Navien heating systems, including tankless water heaters and condensing boilers. This sensor monitors air pressure to help ensure proper and efficient operation of the system. It features an analog output and is typically flange-mounted inside the unit. Compatible with CR and CC Series Tankless Water Heaters, CH and CH-ASME Series Condensing Gas Combination Boilers, and NR and NP Series Condensing Tankless Gas Water Heaters, this sensor supports a pressure range of 0 to 100 psi. It is an essential replacement part for maintaining performance and safety in Navien systems. Features OEM Navien replacement part Measures air pressure up to 100 psi Analog output signal Flange mount design Compact and lightweight Applications CR/CC Series Tankless Water Heaters CH/CH-ASME Series Condensing Gas Combination Boilers NR/NP Series Condensing Tankless Gas Water Heaters PNAV000140
