Use of flammable refrigerants of the A2L safety classes and A3 (e. g. R1234yf or R290)
The information in this chapter about the use of refrigerants of the A2L safety class refer to European regulations and directives. In regions outside the EU, observe the local regulations.
This chapter describes the additional residual risks posed by the product when using A3 and A2L safety class refrigerants and provides explanations. This information helps the system manufacturer carry out the required risk assessment of the system; it can in no way replace the risk assessment for the system. For further information on the system design, see Technical Information AT-660.
Design, maintenance and operation of refrigeration systems using flammable refrigerants of the safety class A2L are subject to particular safety regulations.
When using a flammable refrigerant:
Affix the warning sign “Warning: flammable materials” (W021 according to ISO7010) well visibly to the compressor.