Example of Fault Detection and Diagnostics: Pneumatic actuator leak and Filters in Alarm
Pneumatic actuator leak The building HVAC systems are controlled via a DDC front end connected to pneumatic actuators out in the field. The heating and cooling valves for a large 100% outdoor air-handling unit (AHU) were operating off of a common pneumatic air feed to the valve actuators. The pneumatic line developed an air leak […]
