R-32: understand its features and use the right equipment

R-32 is now standard in Japan and, driven by F-Gas, is gaining ground across Europe. By 2025, refrigerants with a GWP greater than 750 will be prohibited in single split air conditioning systems with a charge of < 3 kg or less.

With a GWP of 675, R-32 not only meets F-Gas requirements, its thermodynamic properties make it more energy efficient than R-410A, can improve its cooling capacity and reduce the equipment’s load.  This also helps to reduce a system’s carbon footprint.

Backed by air conditioning manufacturers such as Daikin, Panasonic and Mitsubishi, R-32 is a pure substance that EN378 currently classifies as flammable (A2L).  A revised EN378 standard is expected to be published by the end of the year that will allow the classification of R-32 as mildly flammable.  It is also necessary to take into account the features of this fluid in its handling, storage and transportation.

R-32 requires a cylinder with a test pressure of at least 48 bar. This is slightly higher than that of the R-410A, and does not allow the use of low pressure containers.  Cylinders intended for flammable fluids must have a red top and a red hazard label with a flame. In accordance with the regulations, they must be equipped with a left hand thread valve outlet.

It is important to use approved equipment for this refrigerant and this will include recovery machines, hoses and manifolds.
Recovery of R-32 from a system should only be into recovery cylinders intended for flammable fluids.
As refrigerant experts, Climalife can offer R-32 in a range of cylinder sizes for servicing and first fill of equipment.  Specific recovery cylinders are available as well as approved equipment for working with R-32.