That P&T will put you up around 4 volumes of CO2, which is in the range for hefeweizen but isn't a rule. Start lower if you like and see how it is, then turn it up and keep testing it. It will be a pain though, because to do it right once the dissolved gas level has stabilized at each point you'll need to keep making the hose longer as you turn up the gas to get the right pour. It's less hose consuming to start higher and make the hose shorter as you go, but then you have the problem of getting the CO2 out of solution. Or you could bottle some test samples with different amounts of sugar to get varying levels of carbonation, and then see where you like it.
I think it will be a pain no matter what you choose to do. But only you can decide what is "right" for your beer.