Lets take a bit of a look at the situation. Since you're in Germany,
does that mean you're exempt from the USA regulations about freon recovery,
Anyhow, we do need a bit more information to be helpful. Please see if
the existing equipment has any technical specs. Name plate, that kind of
thing. Do you know the temperature range of the equipment?
As to producing -40 temps, that's going to provide some challenges. Not
many refrigerants do that low temp. Zero F is doable, with 404a, but not
sure about the lower temp. Water cooled condensor is excellent idea, you
have plenty of cold water to work with.
Lets get some more information.
Christopher A. Young
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