To model a non-axi-symmetric object, such as a fan, you will have to use a Moving Reference Frame (MRF) within a multiple-volume flow domain. Note the rotating wheel tutorial is axi-symmetric, so it is modeled with a simple angular velocity assigned to the wheel faces.

To simplify your geometry I suggest you only model the rotating fan blades, i.e., omit the shaft and motor housing.

For your ceiling fan simulation:

1. Enclose the entire fan within a cylinder - an axi-symmetric volume.
2. Keep a copy of the cylinder.
3. Subtract the fan from the original cylinder to form the MRF volume.
4. Subtract the copy of the cylinder from the room to give a void that perfectly matches the MRF volume.
5. Use the Faces->Connect tool on the Geometry Tool Palette to connect the faces between the 2 volumes.
6. Create a group of the 2 volumes and assign the Substance to the group.
7. Setup the MRF by assigning Conditions->Angular Velocity to the MRF volume.
8. Setup up all faces excluding the internal connected faces as Conditions->Walls.

MRF is for steady-state simulations, so you will not see the blades moving. It's as if the fan is spinning and you take a snapshot at an instant for the current fan position. MRF is also known as the frozen rotor method.