Arkansas HVACR NewsMagazine January 2024

HVACR NewsMagazine January 2024

Tech News

individual components of split systems will be allowed indefinitely. You can replace compressors, TXVs, and even condensing units of R-410A systems needing repairs. Wait! Can’t We Install Multiple “Components” as Systems? Things can get a little tricky with the components, and it won’t be practical (or legal) to install multiple parts — manufactured and sold as components — as a complete system. It would be a violation to install a new evaporator and new condenser and treat it as a system install, but that’s not the only thing that makes things complicated. The differing warranties for parts and systems would make it impractical (even if the law d idn’t already). Some components may also have to be dry-charged with nitrogen instead of refrigerant if the R-410A prices increase. Getting the R-410A refrigerant and field charge the system may be more difficult and expensive. M1 efficiency regulations set forth by the Department of Energy (DOE) can also make replacing condensers in older systems harder. Anything we install must comply with the DOE regulations — the same ones that brought us SEER2. To learn more about how a manufacturer (Rheem) has approached the M1 efficiency regulations and SEER2, you can watch this HVACR Learning Network video (again, with an option to earn NATE credits).

A2L-Rated Tools and Tanks

All the hand tools you’ve been using on A1 systems will be safe for A2L systems. These include wrenches, flaring tools, copper bending tools, and more. However, vacuum pumps and recovery machines must be rated for use on A2Ls. In these tools, refrigerant may be in direct contact with components of the tool that spark. Many of the most recent models have been approved for A2Ls; you just have to look up your equipment model number to make sure your machines are rated for A2Ls. As you look to replace broken tools, make sure they are forward compatible. If you’re unsure if your tool is A2L -rated, you can see if it’s on this list from TruTech Tools. If you have questions about a specific tool, you can always research it online or call the manufacturer. Here is a list of common tool brands with links to some relevant information about A2L compatibility: Yellow Jacket A2L tanks will also have left-handed threads to reduce the possibility of someone mistaking them for A1 refrigerant tanks. It’s best practice to transport these tanks upright and secured, but they have built-in relief valves to keep them from bursting in emergencies. You will still be able to transport up to 440 pounds of A2L refrigerants in pressurized tanks on your truck, too. • Blu Vac • Fieldpiece • NAVAC • Testo •