This European Standard is applicable to non-ducted unit air coolers for refrigeration operating:a)with direct dry expansion of a refrigerant;b)with liquid overfeed by pump circulation of a refrigerant;c)with a liquid.This standard specifies uniform methods of performance assessment to test and ascertain the following:- product identification;-standard capacity;-standard liquid pressure drop;-standard refrigerant pressure drop (for operation with liquid overfeed by pump circulation only);-nominal air flow rate;-nominal fan power.It does not cover evaluation of conformity.It is not applicable to air coolers for duct mounting or with natural air convection.This standard does not cover technical safety aspects.