If you have a filter press, just learn to properly use it, don't even consider buying something else. When you know how a filter press will give you super results and you will not blow papers.
Yes, run mor filter aid for the first syrup thru a new set of papers, then you can use less until the hollow plates become full. At 11-12 gal you will not fill the plates on a 3 bank. Then for any repeat use the same production day, just do as Dr. Tim says, start slowly, with the bypass opened and as the syrup starts to get warm out the discharge from the filter (not the bypass) slowly oclose the bypass. Keep an eye on the pressure, for mine I use 40 PSI max, as the plates get hot again you can close the bypass more, but slowly. The warm up might take a couple of minutes from first flow out of clean syrup until full flow.
However, if you are sold on a siro filter, send me the junker you have, I'll scrap it for you!
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.