Loading ...

Please click anywhere to start.

Welcome to Bosch’s A2L Transition Course!

Equipment Changes

Select each point on each product to see what features replacement models will have compared to
current models.

CURRENT - R-410A

NEW - R-454B

Industry best business practices
recommended, but no specific R-410A
refrigerant flammability safety
requirements.

NO R-410A refrigerant leak sensor.

NO compressor operation or blower
change for R-410A refrigerant leak
detection.

R-454B refrigerant flammability
safety requirements required.

R-454B leak sensor provided.

R-454B leak detection by sensor will
disengage compressor and energize
constant blower operation for
refrigerant vapor dilution within space.

Best Practices

Cycle through each image to see best practices that should be done before charging.

you

spin

me

right

round

Safety and Transportation Considerations

Safety protocols for new R-454B and past refrigerants are largely the same with many of the best practices
commonly used today with R-410A still applicable. However, an increased focus on safety is required. Select each
checkbox after reading each item to confirm you understand both safety and transportation considerations.

Safety Considerations

  • R-454B is mildly flammable so it should be handled
    appropriately

  • Understand the refrigerant’s properties and use,
    personal protective equipment(PPE), and equipment
    manufacturer installation criteria

  • Follow the manufacturer’s recommendations and
    refer to the R-454B SDS (safety data sheet) for
    specific hazards and mitigation issues

  • When brazing a system that has been charged with
    an A2L refrigerant NFPA 704 hazard placards must
    be placed in visible locations around the jobsite.
    The refrigerant tubing should be pressurized with
    air to stabilize the inner walls. The system charge
    must be vented to the atmosphere before beginning

Transportation Considerations

During transportation of A2L refrigerants:

  • Ensure a dry-powder Class B fire extinguisher is
    available on the vehicle

  • Review all local, state, and federal regulations
    applicable in the jurisdiction of transport

  • Do not store refrigerant cylinders near heat or a source
    of ignition

  • Label all refrigerant cylinders following guidelines in
    US 49 CFR part 172.417

  • Secure flammable refrigerant cylinders to prevent
    theft, tampering, or movement during transport

Congratulations!

You completed Bosch’s A2L Transition Course!

As a note, Bosch can continue to offer replacement components for R-410A systems after Jan 1, 2025 to facilitate equipment repairs.

clock
5 min.
click-icon

A2L Transition

SECTIONS

GWP:

  • Global Warming Potential. A rating system to measure GWP. Must be <700 GWP to be compliant

HFC:

  • Synthetic refrigerant gases made up of hydrogen, fluorine, and carbon commonly used in air conditioning systems. Short-lived greenhouse gases that impact global warming and can be many times more powerful than carbon dioxide

AIM ACT:

  • ​The AIM ACT mandates a 15-year phasedown of HFCs at a national level, administered by EPA, and aligned with the Kigali schedule

LOWER FLAMMABILITY LIMIT (LFL):

  • Lowest amount of a specific refrigerant in air that allows for flammability

A2L:

  • A = nontoxic
  • 2 = flammable
  • L = low burning velocity

R-454B REFRIGERANT:

  • Mildly flammable low global warming potential (GWP) hydrofluoroolefin-based zeotropic blend of R-32 and R-1234yf

Well done!

You correctly did it.

Not quite.

There were some issues.

Not quite.

There were some issues.