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In this episode, we break down how glide refrigerants behave and how technicians should use bubble point and dew point when setting up and troubleshooting refrigeration components. I'll explain refrigerant glide, how blended refrigerants behave differently from pure refrigerants, and how to use a pressure temperature (PT) chart to understand what is actually happening inside the system. We also walk through TX valve setup, superheat, subcooling, head pressure controls, EPRs, and common problems that can occur when the wrong temperature reference is used. The episode also highlights why understanding the properties of blended refrigerants is critical for protecting compressors and ensuring long-term system reliability.
In this episode, we discuss:
(00:47) Understanding Refrigerant Glide
(02:00) Bubble Point vs. Dew Point
(04:00) TX Valves
(05:00) Using A PT Chart To Check Glide Refrigerants
(06:00) Setting Up A TX Valve With Bubble Point And Dew Point
(08:24) When To Use Dew Point On The Low Side
(09:00) Bubble Point For Head Pressure Controls
(10:00) Using Bubble Point For Subcooling
(11:00) Setting Up EPRs With Blended Refrigerants
(13:00) Understanding Compressor Superheat
(14:00) Protecting Compressors From Saturated Vapor
(15:00) Blended Refrigerant Properties
Helpful Links & Resources:
Episode 353. Understanding TX Valves (Tips and Troubleshooting)
Episode 389. TXV & Superheat 101 with Andrew Freeburg
