EPA 608 Prep 29, Operating in a Vacuum — How Low-Pressure Systems Pull in Air

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - Why leaks in low-pressure chillers draw air and moisture INTO the system instead of venting refrigerant out. - That the primary indicator of a leak in a low-pressure system is high condenser (head) pressure. - The function of a purge unit is to continuously remove non-condensables that enter through leaks. - How to perform a leak test by pressurizing the system with dry nitrogen, never exceeding 10 psig. - The crucial exam trap assuming low-pressure systems leak outward like high-pressure systems. For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep