You're right, that makes sense, but what had confused me is that there is a separate named Swell division. If I recall correctly there were four pedals so more that just the Swell division must have been enclosed with shutters but I don't know which ones. Along with Swell I think there are Great, Crescendo, and ? pedals.

There were 29 couplers, over 80 stops, and over 4,000 pipes. The lengths of the windchests holding the pipe ranks typically ran 8 or 16 feet, though a few were 4 feet and two were only 2 feet. It was one of the biggest organs in the state.

The console number was 1319 according to a handwritten note on the stop list.

The 7 divisions were:

Great
Swell
Choir
Solo
Antiphonal
Echo
Pedal

According to the little write-up in one program, at Rose Terrace three of the divisions were stacked, reaching a height of three floors, and the other four divisions and console were in separate rooms, with the sound being piped over to the ballroom.