Parallel Compression, Oil System Differences & Brett's Flat in Bat Country - Episode-524

Hotel Wi‑Fi, Flat Tires & Parallel Compression Chaos | Advanced Refrigeration Podcast

Brett Wetzel and Kevin Dumpless kick off this episode from a wildly bright SpringHill Suites in Fort Worth after travel chaos, traffic frustration, and a flat tire that dropped pressure to zero in record time. From there, they jump into real-world rack work: long weeks on a rack change-out, frustrations with manufacturers leaving no room for core pullers on EPRs/A8 valves, and the familiar pain of electrical contractors who don’t read prints. Kevin walks through a parallel compression CO₂ startup, including staging issues tied to flash gas bypass valve capacity, oil reservoir differential problems, and how a weighted check valve maintains oil flow when flash tank pressures rise. They compare oil separator strategies, discuss ICAD reliability versus steppers, and highlight a dock reheat/dehumidification setup using defrost return gas and controls.