Applies to automatically controlled refrigerated bulk milk tanks meant for mobile or fixed installation on farms or at milk collecting points having a rated volume not over 25,000 litres. Also applies to immersion coolers and to equipment delivered as a number of units for assembly into a single appliance. Does not apply to: milk coolers having a precooling system; milk coolers incorporated in heating systems; instantaneous milk coolers; refrigeration and food freezers. Also includes definitions.