The circulation pump on the CC-902 has capability of 25L/min, suggesting to me that the reason you received such long plumbing was to remove the heat rejection dissipating from the 902 far way from the processing location.
This is why we specify water-cooled thermoregulation equipment in our builds, because of the very issue you are facing right now, you’re pooring too much heat rejection from the 902 into your ambient room temperature causing the unit to over work.
Speaking on the subject of over working, Huber specifies the 902 has 0.6 kW at -60c and 0.2 kW at -80c, which is questionable capability for your application size and target temp. Also the CS-100 is barely enough in our experience with Precision’s recovery pump coil and tank so I would assume since this system has 100Ibs of solvent the recovery coil size is comparable to the ETS unit which means the CS-100 is also probably JUST underspec’d for your needs.