R 410A Study guides, Study notes & Summaries

Recovery cylinders used with R-410A must have a DOT rating of: - either "DOT 4BA 400" or "DOT 4BW 400" A system using R-410A refrigerant has bubbles in the sight glass. Technician A says that the system must be low on refrigerant. Technician B says that the bubbles could be caused by the blended refrigerant flashing in the increased volume of the sight glass. Who is correct? - Technician B only When charging a R-410A system that uses a thermostatic expansion valve, proper charge can be...