WE just put a new C/U in and an NEw AHU at a Location.
The Unit has Twin Digital scrolls. I have never installed something with the Digital scrolls, and I set the unit up for CType 3, which controls discharge air, but the compressors sound really bad when loading/Unloading. Also, the unit seemed to take quite a bit more refrigerant than I was expecting or than the Install Book and charging procedures Described. I never could quite gewt the unit spot on on the charging chart....My LL temp always seemed to be high for my given pressure.
Are these Scrolls really noisy, almost sounding like a Reverese rotation when they unload, and they seem to cycle very erratically. Sometime unloading as short as 1 second and it has me worried....so I took away the the capacity control in the setup last night until I could research it making it run more like a traditional compressor. With it running loaded it sounds and acts completely normal.
Am I just a bit over worried here?