What is done during commissioning of a duct system to ensure correct rotation of the fan?

During the commissioning of a duct system, bumping the motor is a crucial step to ensure the fan rotates in the correct direction. This practice involves momentarily starting the motor to observe the rotation of the fan blades without allowing it to run continuously. By doing this, technicians can verify that the fan is rotating as intended, which is essential for efficient airflow and system performance.

If the fan is spinning in the wrong direction, it can lead to poor airflow, increased energy consumption, and potential damage to the system. Therefore, confirming the correct motor rotation through this method is vital before fully operating the system.

While adjusting the fan speed, inspecting the duct system for leaks, and testing electrical connections are important commissioning tasks, they do not specifically address the issue of verifying the motor's rotation direction. Bumping the motor directly targets this verification, making it the right choice in this context.