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Learn more about Refrigeration Mentor Customized Technical Training Programs at www.refrigerationmentor.com/courses

This is the third in a 4-part “Basics of CO2 Controls” series with Kevin Mullis, Head of Product Engineering at Clade Engineering Systems, this one focusing specifically on Programming with CAREL. We’ll discuss the similarities between different control systems, basic components and proper installation. We also cover technical aspects, including electronic valves, pressure measurements, wiring and cable specifications for stepper valves. Better knowledge of CO2 control systems will not only help refrigeration technicians troubleshoot more efficiently, but also build much better relationships with customers and store managers.

In this episode, we discuss:

-CAREL controllers and electronic valves

-Controller manual usage best practices

-CO2 system pressure measurement challenges

-CAREL controller configuration and flexibility

-Stepper valve controller safety features

-Cable specifications for stepper valves

-CPT (calculated product temperature)

-PID (proportional-integral-derivative) control

-Maintaining controller settings

-Refrigeration defrost cycle management

Helpful Links & Resources:

Episode 340. Basics of CO2 Controls with Kevin Mullis (Part 1 of 4)

Episode 341. Basics of CO2 Controls - Programming with RDM with Kevin Mullis (Part 2 of 4)

Episode 30. CAREL's CO2 Electronic Valves and CO2 Controllers with Timo Kaufhold

Join the Refrigeration Mentor Hub here

Learn more about Refrigeration Mentor Customized Technical Training Programs at www.refrigerationmentor.com/courses

This episode is a casual coffee session with longtime technician, Andrew Freeburg, sharing stories and lessons learned from past service calls. We discuss a number of topics, including troubleshooting oil pressure issues in refrigeration systems, P&ID diagrams, high humidity, and even practical tips for creating effective training videos for fellow technicians. We also dive into the importance of setting both professional and personal goals and the value of seeking out training resources and communities to help teach and mentor you on your career journey. Want to take part in our next coffee chat live? Join the Refrigeration Mentor Hub here.

In this conversation, we cover:

-Creating effective training videos

-Oil pressure issues

-Troubleshooting sweating cases

-Understanding mullion heaters

-High humidity and HVAC issues

-Importance of reading manuals

-Real-world troubleshooting examples

-Goal-setting

-Personal and professional growth in the trades

Helpful Links & Resources:

Episode 337. Troubleshooting a Refrigeration Rack Down with Andrew Freeburg

Episode 250. Service Call Stories and Troubleshooting Tips with Andrew Freeburg

Episode 163. A Pro's Handbook for Effective Refrigeration Troubleshooting

Join the Refrigeration Mentor Hub here

Learn more about Refrigeration Mentor Customized Technical Training Programs at www.refrigerationmentor.com/courses

In this second part of our Basics of CO2 Controls training series, we’re diving into programming RDM controllers and staging compressors. This episode focuses on understanding inputs and outputs, programming controllers and mastering the fundamentals behind various manufacturers' controls, including Danfoss, Microthermal and more. Kevin shares key information on setting pressure targets, understanding response times, working with receiver interlocks, and more, all to help refrigeration technicians handle any CO2 refrigeration system more efficiently.

In this episode, we cover:

-Programming controllers

-Understanding compressor staging and alarms

-Mapping inputs and outputs

-Setting compressor parameters

-Safety in CO2 refrigeration systems

-Dry ice formation

-Managing discharge pressure and alarms

-High ambient temperature strategies

-Optimizing gas cooler and receiver settings

-Noise control

Helpful Links & Resources:

Episode 340. Basics of CO2 Controls with Kevin Mullis (Part 1 of 4)

Episode 170. Troubleshooting RDM CO2 Controllers w/Cody Hamm and Chris Prom Resource Data Management RDM

Episode 64. CO2 Controls with RDM Resource Data Management