I've got 2 F8 subs and they are fantastic. They're really not much different setup wise than any other subwoofer. According to the manual for your sound bar (found here:
https://www.paradigm.com/downloads/S...ual_ONLINE.pdf) there's a subwoofer RCA output on the back of the sound bar. Once connected, you need to go into the settings for the soundbar and set subwoofer to wired. This will activate a crossover in the soundbar and re-route the bass to the F8. It didn't say what frequency this crossover is at (probably somewhere between 80-120hz).
Your sound bar should also have come with a wireless sub receiver which you can use if can't run an RCA cable.
For the F8 itself, I would set the subwoofer to ON. (It has an auto-on option as well, but I would start with always ON). Set volume to 50%, crossover at 200, LPF slope at 12dB, phase at 0, and bass extension at High. The F8 does not have a parametric EQ, so you don't need to worry about any PEQ settings. This is just to start with, you will probably need to tweak these settings a bit, until you find what works best for you.