It is not possible to set the RotationNormalizedAngle to a value different from those you get from an input map. For example, you cannot set it to a value from a make float once created inside the module graph editor nor the result of multiplying the input map value by a constant in a node inside the graph. When trying this the RotationNormalizaedAngle is always set to 0.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-195802 in the post.