CO2 Nope, Kool Gas Defrost Operation I'm Finally Home Episode 517 Video

CO2 Nope, Kool Gas Defrost Operation I'm Finally Home Episode 517

Cool Gas Defrost Chaos: Deer Hits, Smashed Windows, and Hussman Rack Troubleshooting

Brett Wetzel and Kevin Compass kick off the Advanced Refrigeration Podcast by begging for listener topic requests and recapping a week of pure mayhem, including Brett’s 27-hour drive home from Pennsylvania after hitting a deer and nearly blowing a tire, plus Kevin’s disaster-filled week running multiple remodel startups while a customer changed EMS controller passwords mid-day and thieves smashed van windows in a Chicago parking lot. They pivot into a hot-weather technical deep dive on Hussman cool gas defrost, contrasting it with hot gas defrost and explaining cool gas as a latent-heat process that depends on proper termination. They cover how LDR/OLDR differential control can spiral during vapor-in/vapor-out conditions, how receiver level and outlet piping height can ruin defrost by pulling liquid, why head pressure isn’t the fix, and how to troubleshoot via graphing and defrost schedules. They also stress correct defrost termination temps in winter, proper fan shutoff strategy (preferably via EMS or suction-line controls), and common Hussman retrofit pitfalls like miswired bi-flow CME solenoids, wrong internal rebuild parts, and when to gut or remove unnecessary solenoids and branch boards to reduce leaks and headaches.