Flexible Combiners, CO2, SH, Liquid Injection, & Hotgas.. Anti Relief, and Oil Control Episode 542 Audio

Flexible Combiners, CO2, SH, Liquid Injection, & Hotgas.. Anti Relief, and Oil Control Episode 542

CO2 Rack Chaos: Superheat Mitigation, Anti-Relief Headaches & Flex Combiner Fails

Brett Wetzel and Kevin Compass catch up on a hectic pre-Thanksgiving workload, including MicroThermal programming surges, Walmart K2 case startups with inconsistent wiring, and struggles accessing newer Novar controllers due to password and tech support issues. They then walk through CO2 rack control logic using E3 flexible combiners, focusing on hot gas injection superheat mitigation, debating appropriate superheat cut-in/cut-out and how low superheat worsens oil carryover. They critique an anti-relief strategy near the flash tank for causing flat racks via dry ice sticking valves, and discuss a receiver hot gas injection scheme meant to maintain winter receiver pressure and oil differential, noting an apparent incomplete implementation. They also review overly complex oil separator pulsing logic, relay wear concerns, and argue standardized CO2 suction group control could eliminate much custom programming confusion