BS EN 14511-4. Air conditioners, liquid chilling packages and heat pumps for space heating and cooling and process chillers, with electrically driven compressors. Part 4. Requirements|Water, Air, Air conditioners, Marking, Cooling equipment, Air-conditioning systems, Air-conditioning equipment, Instructions for use, Control systems, Electrically-operated devices, Cooling, Coolers, Refrigerating systems, Heat transfer, Compressors, Performance testing, Performance, Heating equipment, Liquids, Environment (working), Heat pumps, Space-heating systems, Air coolers, Condensers