I just installed a new commercial grade 230 volt JBJ Artica Chiller on my 600 gallon system rated at 1 horsepower. If I set the desired temperature to 78 degrees, the chiller will start cooling at 79.1 and won’t turn off until 76.9 degrees. It is 2 degree variance but I would like to get it closer to only half a degree or at least a degree but not sure that is possible. For those with larger systems is this something you have been able to achieve or should I accept the 2 degree variance and not worry?