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This episode of CO2 Experts is the second of a 2-part lesson on advanced CO2 refrigeration troubleshooting with Chris Brown, Application Engineering Manager of Danfoss (You can listen to Part 1 here). In Part 2, we dive into the technical side of CO2 system start ups - tips and things to look for to really be proficient on getting that rack up and running or getting to a point where you can start adding gas. We also focus optimizing controller settings, tuning, and ensuring effective pressure management. 

In this episode, we discuss:

-Controller tuning and receiver pressure

-Understanding PI selection and tuning results

-Troubleshooting rack superheat

-Hot gas and liquid injection dynamics

-Oil management

-Booster systems and discharge pressure issues

-Understanding medium temp suction pressures

-Low temp discharge safety settings

-Medium temp compressor issues and solutions

-Suction Floating

-Handling emergency shutdowns

-Phase loss monitor checks

-Troubleshooting charge loss

-Leveraging manufacturer support

Helpful Links & Resources:

Danfoss Supermarket Support

Danfoss YouTube Channel

Chris Brown on LinkedIn

Controller Talk Podcast S3 E13: “Inside Supermarket Refrigeration with Refrigeration Mentor, Trevor Matthews”