I’m hunting for continuing ed that goes deep on refrigerant management with A2Ls and CO2 transcritical — hands-on labs, not slide decks. I’m updating our SOPs to include weighed recovery/charge with cylinder temp compensation and barcoded tracking (Bluetooth scale verified to +/- 0.05 lb), managing glide on R-454B, and dialing flash tank/ejector setpoints; what courses or instructors deliver? In the meantime, log every pound in/out and stabilize cylinders to 70°F before weighing — no top-off guesses.
@Hillphoenix Learning Center’s CO2 transcritical class was the only one where I tuned a live rack — flash tank PID, ejector map, parallel compression; 3 days, about $1.5k, no slide-deck fluff (Industrial Refrigeration Training | HillPhoenix Learning Center). > scale verified to +/- 0.05 lb), managing glide on R-454B, and dialing flash tank/ejector setpoints; what courses or instructors — ESCO’s Low‑GWP/A2L hands-on made us temp‑comp the charge and verify the Bluetooth scale with a 5 lb check weight, and they cover real R‑454B glide tactics. If you can’t travel, the Danfoss CO2 mobile unit is solid for controls, but ejector time is short, .
I got the most hands-on at Parker Sporlan’s CO2 seminar in Washington, MO — mapped the ejector curve and tweaked parallel comp cut-ins, then verified charge by mass on a live rack with a Bluetooth scale. Only caveat: classes fill up fast; if you miss it, the Danfoss ADC in Baltimore is a solid fallback with real gear too (https://learning.danfoss.com). It’s like a flight simulator, just with gauges instead of joysticks.