Apprentice question
Verify first
Verify before you commit. Cheap to catch now.
Damper actuators are voltage-specific. If the wrong voltage hits the actuator, stop testing, document it, replace only with approved parts, and have electrical/controls correct the power source.
['A fire/smoke damper actuator is not universal. If line voltage is connected to a low-voltage actuator, the motor can burn out immediately.', 'Stop testing and do not keep cycling it. Verify the actuator label/submittal, control voltage, transformer, wiring responsibility, and replacement requirements. Life-safety actuators should be replaced and tested per manufacturer and commissioning procedure.']