S&A water chiller CW-6000 for TECNA spot welding machine CW-6000 water chiller with compressor refrigeration is developed and produced by S&A company of China, it is applied for cooling 200W-400W TECNA spot welding machine. CW-6000 water chiller has 3000W cooling capacity with ±0.5? stability, it has 2 temperature control modes as constant temperature and intelligent temperature control. Under intelligent mode, the water temperature is adjusted according to ambient temperature.