Well I have worked my way through my second aquarium chiller! The Via Aqua CC25. After some tinkering I managed to bypass the thermostat and set the unit to stay on all the time. It ended up achieving a max water temp of aproximately 0 degrees C as measured before the intake of the pump. With insulation and everything installed I was able to hit 20 degrees C at the socket according to the onboard temp sensor. I put insulation over the center of the socket so the accuracy of this temp probe may not be so good. I also forgot to install my own temp sensor and now have to much gunk on the socket to put one in. This unit is only capable of 1500 BTU's. With that information it is obvious why the unit doesn't provide additonal cooling. I think my next plan will be to use an Air Conditioning unit rated at 5,000 btu's.
Out of curiousity, how does a temp difference of 20 degrees between the water and the socket look. Do other people tend to have closer values or is a 20 degree diference average. Also, should the pump be insulated? It is the only exposed component of the system. I couldn't figure out if it was better to keep the cold in and the pump heat in, or let the cold out and some of the pump heat as well.
System Specs:
Maze 4 WB
Swifty MCP600 pump
1500 BTU chiller
ASUS Deluxe E Mobo NF2
Barton 2500 Chip
3/8" tubing with 1/2" insulation.