The manual calls out a 6" baro of the 130 so you are in good shape for that. For the reason described below I would use 5" up to the baro. This is accomplished by using a 6" cap on the baro inlet and cutting it out to fit the 5" pipe, the 5" pipe then slides through the cap and extends into the baro T by 3.5" from the edge of cap. Also the distance from the center line of the baro to the flue tile should be 9".
With that short of a pipe the pressure from the fan will spike on start up causing fly ash and coal dust to puff out of the baro, the manual has a diagram that shows the pipe location to preclude this (as I described above). Make sure you follow these instructions not only for connection to the Baro (pipe extension) but the location with respect to the thimble in the chimney (9" to the centerline of the baro from the edge of the flue tile).
The above advise is based on my experience helping folks get the AA 130s/260s I sell them set up to run right.