It's been a little while but I'll see what my memory can muster up.
The bright tank was kept at about 15 psi so long as the filter was running good. The pressure in the bell is partially a function of the pressure in the bright tank, so if the bell pressure was rising to where I couldn't finish the filter I would drop some off the bright tank. We did not use a balancing line, which I think everyone should do, in which case I would keep both tanks at 10 psi (what I did on other filters at other breweries).
For pre-coat I would fill the dosing tank to the top of the paddle (about 1/3) with beer, then add 15 scoops of DE. I think then we would recirculate with the dosing pump off until the beer in the dosing tank was bright (10-15 minutes). The flow was at 100, and the bell pressure was at 1 (I think). At that point we were ready to filter and would go to the bright tank, turn on the dosing pump, and refill with DE as soon as possible. I liked to fill the dosing tank to the paddle, add DE, then top it off.
I dont remember there being a numeric value on the dosing pump, I remember gauging by the number of turns outwards on the knob, and really it was a visual thing that came from experience and knowing the brightness of the beer coming out of the fermenter. I want to say normal was 2 turns outwards. Dependent on the quality of the beer and the way the filter was running you would have to adjust. I generally started high, then turned it down until I saw the bell pressure rising. During a good filter the bell pressure would not go above 2. At 4 I would start to worry, and just below 5 I would break down and start over. We also always ran at the speed of 100.
We followed the same cleaning regimen, leaving a weak peracetic solution at post-filtration and packing it, and adding 32 oz. more peracetic before the filter run and sanitizing for 30 minutes. Not necessarily the way I personally would do it but I wasn't the boss and it worked fine in terms of lab results.