WE’RE A2L READY.
As the landscape of HVACR continues to evolve, the transition to mildly-flammable A2L refrigerants stands at the forefront of change. JB understands the importance of staying ahead of the curve. That’s why we’re proud to offer a comprehensive range of essential A2L-ready tools tailored to support our wholesale distributor partners and HVAC technicians through this transition seamlessly.
Navigating the switch to A2L refrigerants may seem daunting, but we’re here to help you with the tools and knowledge needed to thrive in this new era of refrigerants with confidence and expertise.
POLICY CHANGES
In June 2021, the EPA approved A2L refrigerants for use in residential AC applications and the phase-out of A1 refrigerants. Approved refrigerants include the commonly known R-32 and R-454B. The transition is set to take effect in 2025.
THE SAME, BUT DIFFERENT
Service-wise, the switch to A2Ls won’t require fundamental changes to the way technicians operate. In fact, R-454B/R-32 offer similar operating temperatures, pressures, and oil compatibility as R-410A. However, R-454B/R-32 and R-410A cannot be mixed or cross-contaminated.
MILDLY FLAMMABLE
A2Ls are considered mildly flammable meaning that a direct flame source and a high concentration of refrigerant is required to create a flame. A2Ls are considerably less flammable than Class II and III refrigerants. These differences will require more attention to basic service principles, new equipment and some A2L-rated tools.
THE CORE FOUR
Technicians will not need all new tools to work with A2L refrigerants. Many tools will remain the same. Generally, tools that don’t touch the refrigerant circuit can usually be used for both A1 and A2L systems. The four main required tools are manifolds/gauges, vacuum pumps, recovery units, and leak detectors.
A2L CYLINDERS
A2L reclaim and recovery cylinders have three key features to distinguish them from other types of refrigerants: (1) Cylinders will use a pressure relief valve for safety instead of a rupture disc, (2) The tops will have a red band for identification purposes with two warning labels, and (3) The threads will be reversed.
REVERSE-THREAD ADAPTERS
Because A2L recovery cylinders will have reverse threads, a reverse thread adapter is required to connect hoses. Using separate charging hoses will also help reduce the risk of cross-contamination, and allow you to safely access A2L refrigerant and charge systems.
STAY IN CHARGE
When charging A2L systems, it’s essential to follow the manufacturer’s instructions. This includes weighing in the refrigerant charge according to their specifications, adjusting based on subcooling charts, and checking superheat. On analog gauges, use the proper refrigerant temperature scale, and set digital gauges to the correct refrigerant to ensure accuracy.
EVACUATE PRECISELY
When evacuating A2L systems, use an A2L-rated vacuum pump and triple evacuate the system to remove moisture, air and other contaminants. Using a micron gauge is essential during evacuation to accurately measure the vacuum level inside the system. Compound gauges are not precise enough to determine evacuation effectiveness at these low micron levels.
Enhance your team’s understanding of A2L refrigerants with our A2L Cheat Sheet. This one-page infographic is designed to streamline knowledge sharing on regulations, tools and best practices. Share it with your employees to ensure everyone stays informed and aligned with the industry transition. Download here.
