YMAE units with R-454B refrigerant
R-454B refrigerant is classified as a Group 1 PED fluid and Safety class A2L in accordance with ISO
817.
Check your local regulations and the correct standards, such as those in Safety standards, to
verify the allowable filling charge, new equipment design, and safe handling requirements for the
intended application.
When an equipment standard provides guidance for charge limitations, the equipment standard
overrules charge limitations in the general safety standard.
The pressure relief valves fitted to YMAE units with R-454B refrigerant are individually approved
in accordance with existing standards under ASME from the manufacturer. National and local
standards may apply regards relief valves and refrigerant release into the environment.
Do not retrofit an existing system with other refrigerants such as R-410A or R-454B in the field. For
more information, contact your local Johnson Controls branch.
YMAE Air-Cooled Inverter Scroll Chiller and Heat Pump16