SBIG advises Not to cool the water which is going through the camera to cool the CCD inside.. it can cause dew to form inside the camera body, which can fry the electronics!
But here in summer the temp goes way to high.. so a few months back i had built a custom water cooling system where i can set the temperature with a micro controller. Now i keep the temperature of the water above the dew point and everything works fine!
Here is a comparison.. 31 Celsius goes in the camera and 35 Celsius comes out and drops in the water cooling box.
