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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

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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

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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

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

This episode is the first of a four-part CO2 series, starting off with a dive into the basics of CO2 controls with Kevin Mullis, Head of Product Engineering at Clade Engineering Systems. This is about returning to fundamentals, even for seasoned technicians, to ensure a thorough understanding CO2 controls, programming, wiring diagrams, meter readings, and step-by-step troubleshooting techniques. Kevin shares lots of great tips and advice for refrigeration technicians to enhance their skills and confidence in handling CO2 refrigeration systems.

In this episode, we cover:

-Introduction to CO2 controls

-Refrigeration controller fundamentals and basics

-Wiring diagrams

-Importance of proper tools

-RDM controllers

-Probes and transducers

-Relays and voltage

-Voltage and relays

-Testing and troubleshooting relays

-Universal inputs and outputs

-Analog signals and transducers

-Identifying and tracing probes

-Practical tips for wiring and safety

-Compressor circuits and VFD’s

-Sequence of operation in CO2 systems

-Analyzing a zero zone drawing

Helpful Links & Resources:

Follow Kevin on LinkedIn

Clade Engineering Systems

Episode 315. Mastering RDM Controls, Live Commissioning & Networking Essentials with Kevin Mullis

Episode 299. Basic Refrigeration 101

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In this episode, we’re joined by longtime refrigeration professionals Andrew Freeburg and Erik Holland for a casual “Morning Coffee” covering both technical topics and personal development in the refrigeration industry. We dive into tips and field experiences for troubleshooting communication (comm) loss and controller issues in refrigeration systems. We also discuss the value of mentorship in refrigeration and have some great advice on how technicians new and experienced can mentor peers.

In this episode, we cover:

-Mentorship and personal growth

-Lessons from the field: com loss issues

-Communication issues in controls

-Recording video on service calls

-Configuring controllers

-Importance of proper wiring and polarity

-Backup and version control

-Controller replacement

-Power of mentorship

Helpful Links & Resources:

Episode 338. Professional Development Tools & Resources in Refrigeration

Episode 261. Supermarket Case Controller Troubleshooting Tips

Episode 59. Industry Development and Training

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

In this episode, I’m joined by regular guest Andrew Freeburg for a casual coffee talk focusing on professional development for refrigeration technicians. Andrew shares his experience and the importance of investing in oneself through learning opportunities and attending training events. We also dive into the crucial role of good communication in troubleshooting and sharing knowledge within your team, making everyone's job easier and more effective.

In this episode, we discuss:

-Time management tips

-Effective communication strategies

-Maintaining professionalism on the job

-Technical troubleshooting: ethernet issues

-Basics of controls

-Training new technicians

-Attention to detail

-Using multimeters and understanding sequences

-Learning flex combiners and AI troubleshooting

-Developing skills on different controllers

-Switching controllersInputs, outputs, and relays

-The value of hands-on training and networking

Helpful Links & Resources:

Episode 337. Troubleshooting a Refrigeration Rack Down with Andrew Freeburg

Episode 139. 7 Tips For Building Good Training And Development Habits

Episode 24. The Importance of Training & Development in the Refrigeration Industry w/ John MacInnis

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

This episode kicks off another series of “Morning Coffees” featuring conversations with refrigeration technicians sharing stories and lessons learned from the field. These chats are aimed at helping fellow refrigeration technicians grow in their careers based on the real-world troubleshooting experiences of others. This episode features Andrew Freeburg talking about his experience handling a complex refrigeration system rack down, as well as practical tips on processes and handling customer communication.

In this episode, we discuss:

-Diagnosing a rack issue

-Finding and fixing a leak

-Customer communication and documentation

-Mentorship and team leadership

-Communication skills in the trades

-Handling customer conversations

-Importance of labeling and maintenance

-Time management and efficiency on service calls

-Testing and analysis procedures

-Sales skills for refrigeration technicians

Helpful Links & Resources:

Episode 334. 10-Point Rack Preventative Maintenance Checklist

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

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

In this episode, we’re diving into electronic case controllers and valves. I share practical tips on accessing and interpreting manuals, setting up controllers, and troubleshooting common issues. We also cover control points, sensor calibration, and fine-tuning P&IDs. Investing time in learning these systems will enhance your skills and help you become a more proficient technician.

In this episode, we discuss:

-Electronic valves and controllers

-Understanding case controllers

-Specific controllers from Danfoss, Copeland, Microthermal and more

-Finding and using manuals

-Setting up controllers

-Fine-tuning and troubleshooting

-Investing in learning and development

Helpful Links & Resources:

Episode 257. CO2 Experts Live: Case Controllers with Kevin Mullis

Episode 132. Copelands E3 Controller & CC200 Secrets: Unveiling the Top 5 CO2 Tips with Brent Cheshire

Episode 282. Danfoss CO2 Controllers with Dave Yoder