Mounting chiller outdoors

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Again not sure sure how fridges are similiar to chillers, but from the manual that came with our new fridge:

Note: It is recommended that you do not install the refrigerator near an oven, radiator or other heat source. Do not install in a location where the temperature will fall below 55F (13C).

Doesn't say why, but if you are installing the chiller outside, might be a idea to contact the manufacturer for clarification on suitable locations.