2013DIN EN 14511-4:2013 Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling - Part 4: Operating requirements, marking and instructions; German version EN 14511-4:2013
2011DIN EN 12201-5:2011 Plastics piping systems for water supply, and for drainage and sewerage under pressure - Polyethylene (PE) - Part 5: Fitness for purpose of the system; German version EN 12201-5:2011