TS EN 14511-1

TS EN 14511-1 defines the technical language used for electrically driven compressor-driven air conditioners, liquid chilling packages and heat pumps, focusing on how terms and definitions are used when rating and assessing heating and cooling performance. Rather than being a standalone performance test standard, it provides the shared vocabulary needed for consistent product comparison and documentation.

Equipment types and system arrangements covered

The standard covers air-cooled and water-cooled air conditioners, liquid chilling packages, and air-to-air, water-to-air, air-to-water and water-to-water heat pumps. Packaged units, single split and multisplit systems, as well as single-duct and double-duct units, are included. The focus is on factory-made equipment supplied as complete units, including duct-connectable units.

From a technical standpoint, these distinctions matter because the air side, water side, and whether the unit is packaged or split all influence how capacity and performance terms are expressed and compared. For liquid chilling packages, the scope includes units with integral condensers and those intended for use with a separate condenser. The standard does not cover units that cool the condenser by evaporation of ambient air and additional water, and it excludes systems using critical cycle processes, such as CO2 refrigerant systems.

Boundaries and general technical context

The document is primarily intended for water and brine chillers, although it can also be used for other fluids when agreed. Certain definitions may be applicable to sanitary hot water heat pumps, but these are not the main subject of the standard. Industrial heating and/or cooling process installations are outside its scope. The notes also indicate that part-load testing is addressed in CEN/TS 14825 and that all symbols in the standard are to be used regardless of language.

In practice, TS EN 14511-1 supports engineers, specifiers and testers by aligning terminology before performance data are calculated or compared. Its value lies in consistency: once the same terms are used for capacity, rating conditions and equipment categories, technical communication becomes clearer across different product families and system configurations.