Hospital AHU Outdoor air Damper Actuator replacement; Belimo

In this video I troubleshoot and replace a Belimo outdoor air damper actuator in a hospital environment. The customer reported the damper sticking, but the root cause wasn’t mechanical binding, it was the wrong actuator torque. The existing actuator was a 90 in‑lb model installed on a damper that required 180 in‑lb, so it couldn’t overcome the load. I walk through: • Identifying torque mismatch and verifying damper requirements • Selecting the correct Belimo actuator based on torque and shaft size • Proper mounting, linkage alignment, and anti‑rotation setup • Travel verification and end‑stop adjustment • Testing the actuator through the BAS to confirm smooth operation and correct outdoor air control If you work in HVAC, controls, or hospital mechanical systems, this is a solid real‑world example of why actuator sizing matters. Hashtags: #HVACControls #BelimoActuator #BuildingAutomation #HVACTroubleshooting #DamperActuator #HospitalHVAC #ControlsTech #MechanicalSystems #HVACLife #ServiceTechnician