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Episode 243. Step-By-Step Walkthrough of a CO2 Service Call with Patrick Gregory
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In this conversation, Supermarket Refrigeration Technician Patrick Gregory walks us through a CO2 refrigeration service call, step-by-step. He covers cascading and transcritical CO2 systems, troubleshooting common issues and shares a ton of valuable tips on diagnosing problems, whether it's filter dryer blockages, solenoid issues, electronic expansion valve (EEV) troubleshooting or other. We also dive into the importance of manuals and how refrigeration technicians can learn and get more confident servicing CO2 systems.
In this conversation, we discuss:
-Liquid overfeed systems
-Understanding Cascading CO2 Systems
-Step-by-step process of a CO2 service call
-Diagnosing issues in CO2 systems
-Solenoid and filter dryer troubleshooting
-Pump systems and flow management
-Evacuation and leak testing
-CO2 system precautions
-Controller manuals and troubleshooting
-Electronic expansion valves (EEVs)
-Oil Failures
-Charging a CO2 refrigeration system
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