And i’m booking Q1 classes and need programs that teach refrigerant management in the lab — proper recovery/reclaim, cylinder ID and handling, precise charging (±10 g), and commissioning on CO2 racks at 1,200 psi. If you’ve taken a solid A2L or transcritical course recently, did it cover ventilation/ignition risk assessment, mass‑flow based charging vs SH/SC only, oil management, and PRV settings, or did you have to piece that together from multiple providers?
Did the Hillphoenix CO2 class last spring; they had us charge by mass flow, not SH/SC, and hitting “±10 g” was easy once we tared the scale with the hose/ball‑valve attached and bled the Coriolis air pocket first. They also enforced a ventilation/ignition check before any charging at about 1,200 psi; if you can’t get in there, Bitzer Academy’s CO2 day is decent but lighter on live rack time. Industrial Refrigeration Training | HillPhoenix Learning Center.
If you’re chasing “±10 g”, the Copeland mobile CO2 lab had us finish the mass‑flow charge with a short vapor trim through a needle valve while the bottle sat in a 25°C water bath — kept flow steady and avoided dry‑ice burps at 1,200 psi; @olimart’s tare trick helps, but Bitzer’s CO2 day is lighter on live rack time if you want more hands‑.