Hi! I just bought the CS-400CIRV 0.5HP Atman chiller as well. Had a minor incident with damping clamps on the compressor resulting in strong violent vibrations with the chiller. Had it replaced and it is now working silently. Very pleased with its performance, able to chill my 3 footer from 27.3 degrees to 25.0 degrees in 1 hour.
I have a question regarding the use of the temp controller. My Atman is running for 15mins, cut for 5 mins and resume again. Thats restarting 3 times every hour, 72 times every day. Does any one have any idea how to program the chiller such that it does not restart so often?