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the Aaon R64420 is technically identical to the Maxitrol SC25S-B
verify the valve body and trim materials
the internal thermal disc is likely defective and requires replacement
This specific model is designed for a 1/4 inch shaft and is a standard 4-blade fan configuration
Automation Components Inc (ACI) A/ENT Controller 326010-701 the Aaon R64420 is technicallyThe Automation Components Inc (ACI) A ENT is a high precision enthalpy controller engineered to optimize HVAC efficiency by monitoring ambient temperature and humidity. Primarily designed for economizer control and original equipment manufacturers (OEMs), this unit effectively converts capacitive humidity sensor data into a linear 2 wire, 4 to 20 mA output. With a measurement scale spanning 0 to 50 BTUs, the device provides critical input for systems
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