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In this episode, we're discussing CO2 piping - particulatily liquid line. takeoff arrangements. We cover takeoff arrangements, loop systems, also some important technical information manufacturers recommend which give you a reliable blueprint of look for when you're on your service calls. We also talk about manufacturer specs, asking "why" behind designs and best practices when dealing with CO2 piping.

In this conversation, we cover:

(02:42) Loop and Circuit Designs

(03:59) Side vs Bottom Takeoff

(06:13) Flash Gas and Underfeeding

(08:37) Following Manufacturer Specs

(09:28) Piping Best Practices

(09:59) Asking Better "Why" Questions

Helpful Links & Resources:

VIDEO: The Truth About CO2 Oil Management, What Causes Failures and How to Prevent Them with Jonas Linnemann of Vitalis

Episode 317. CO2 Piping Design (Tips to Protect Compressors and Prevent Failures) with Chris Griffiths

Episode 386. CO2 Piping

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

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In this episode, we're diving into provincial/state, national, and WorldSkills events for tradespeople - high-pressure, real-world competitions that build many technical and troubleshooting skills. These programs strengthen our refrigeration trade amid rapid change (CO2, A2L, advanced controls, energy efficiency etc.) and ongoing technician shortages, while developing future leaders and improving company performance. Not only are these competitions fun and challenging, the long-term career benefits and learning - especially from global standards and practices - make these skills competitions incredibly worthwhile. Links below to find out more about national and global skills competitions.

In this conversation, we cover:

(01:07) Discovering Skills Programs

(04:02) Benefits of Skills Competitions for Tradespeople

(06:53) Investing in Skills Development

(10:21) Learning by Doing Under Pressure

(13:07) Modernizing Training Worldwide

(19:27) WorldSkills and National Skills Competitions

(22:28) Becoming and Elite Refrigeration Technician Faster

Helpful Links & Resources:

GAME: https://refrigerationmentor.com/game/

Skills Canada

SkillsUSA

WorldSkills: Refrigeration & Air Conditioning

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

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

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In this conversation, I explain how techs can troubleshoot compressors and refrigeration systems faster and more confidently. I'll walk you through the content of my free 17-page System and Compressor Guide built around 23 key pressure/temperature checkpoints and six common mechanical compressor failure modes. This guide outlines practical steps for compressor replacement and verification, lubrication, oil breakdown and more. Knowing these will result in faster root-cause identification, fewer manager support calls, quicker performance, and even stronger job-interviews. You can download my free System and Compressor Troubleshooting Guide here.

In this episode, we cover:

(02:32) Knowing Refrigeration Fundamentals First

(02:50) 23 System Checkpoints

(03:54) Reading The System Story

(06:49) Patterns In Failures

(08:38) Six Mechanical Failures

(10:22) Compressor Swap Process

(12:31) Overheating And Oil

(15:24) Flooded Starts

(18:06) Slugging Root Causes

(18:54) Shell Design Differences

(19:22) Floodback And Washout

(23:41) Fast Diagnostic Checkpoints

(25:19) Oil Loss Root Causes

Helpful Links & Resources:

Episode 388. Step-By-Step Compressor Change Out (Service Call Recap) with Andrew Freeburg

Episode 228. Tips for Faster Service Calls & Better Time Management

Episode 115: Understanding Compressors: What You Need To Know

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In this milestone 400th episode, we're joined by Andre Patenaude of Copeland to explain 8 critical sensors on CO2 refrigeration systems (video link to this seminar below). Andre breaks down the most critical CO2 refrigeration sensors found in supermarket systems, common failure modes, troubleshooting strategies, and how to prevent catastrophic system shutdowns, product loss, and compressor damage in transcritical CO2 systems. He also explains how technicians, service managers, and contractors can improve reliability through proactive monitoring, redundancy strategies, trend analysis, and smarter control logic. Thank you for listening, following and helping us reach 400 episodes! Check out all of our past episodes and follow the Refrigeration Mentor Podcast on Apple, Spotify and YouTube here.

In this episode, we cover:

(02:27) Why Critical Sensors Matter in CO2 Refrigeration

(08:54) Booster System

(13:19) Gas Cooler Outlet Temp

(23:31) Mitigation Strategies

(31:24) Low Ambient Bypass and T2 Sensor

(37:30) Drop Leg Pressure Transducer

(41:14) Fan Modulation Chain Reaction

(43:01) P1 Transducer Failover Options

(45:46) Proactive P1 Calibration Checks

(47:29) P2 Flash Tank Pressure Basics

(51:38) Suction Group Transducer Backup

(53:54) Oil Level Sensors

(57:09) Adiabatic Pre Cool Sensor 7A

(01:01:46) Ambient Sensor 7B Water Control

(01:10:27) Dry Gas Cooler TD Sensor

Helpful Links & Resources:

VIDEO: Watch this seminar on the Refrigeration Mentor YouTube Channel

GUIDE: Critical Sensors for CO2 Transcritical Systems Guidance (NASRC)

Copeland Website

Andre Patenaude on LinkedIn

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In this episode, I'm breaking down 5 core electrical troubleshooting tips to help refrigeration technicians solve issues faster and more confidently. These encompass electrical sequence of operation, checking and verifying voltage, wiring diagrams and using yoru understanding of mechanical problems to uncover the cause of electrical failures.  Electrical systems are so important to understand in refrigeration because this is where techs spend a large amount of time on service calls.

In this episode, we discuss:

(00:48) Why Refrigeration Electrical Knowledge Matters

(01:58) Electrical Sequence Of Operation

(04:41) Voltage Testing Basics

(08:07) Voltage Drop Tricks

(09:01) Tracing Circuits Methodically

(11:20) Relationship Between Electrical and Mechanical Problems

Helpful Links & Resources:

Episode 371. A 6-Step Process for Faster Electrical Troubleshooting

Episode 323. Electrical Troubleshooting 101

Episode 296. Electrical Troubleshooting in Refrigeration

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

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In this episode, we're talking about how refrigeration technicians and contractors can prepare for the summertime service-call rush. Higher ambient temperatures often make systems run harder, so preparation should start early. In this episode, we'll cover what to check for on the technical side, tips for working smarter, more efficiently, and also planning personal time and maintaining balance between of summer leisure time, long on-call days and prioritizing severe calls.

In this episode, we discuss:

(00:48) Summer Rush in Refrigeration

(01:44) Pre-summer System Checks

(02:46) Heat Related Electrical Failures

(03:54) Diagnosing Issues Faster Under Pressure

(05:20) Prioritizing Calls On-Call

(06:31) Planning Time Off Early

(07:23) Packing And Preparing For Long Days

(10:47) Refrigeration Preventive Checks

(14:04) Using AI in Refrigeration

Helpful Links & Resources:

Episode 313. Summer Prep Training

Episode 318. Designing High Pressure Valves for Summer Heat and Winter Challenges with Chris Griffiths

Episode 220. Improving Work-Life Balance (Without Compromising Your Success)

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

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In this episode, I'll explains how technicians can stand out in refrigeration job interviews. I'll share tips on building confidence, developing a troubleshooting mindset, and communicating technical processes step by step, including fundamentals like superheat, subcooling, wiring diagrams, controls, and compressor diagnostics. Many companies hire for attitude, reliability, and problem-solving more than years of experience, and knowing how to demonstrate work ethic, professionalism, business-minded value and asking strong questions will put you ahead of the pack when it comes to competing for a refrigeration technician job.

In this episode, we cover:

(00:48) Job Interview Mindset

(02:24) Building Trust Through Honesty

(04:04) How to Talk Technical Confidently

(07:25) Job Interview Preperation

(11:39) Communicating Stepwise

(15:07) Value of Showing Ambition

(19:23) On-Call Work Ethic

(25:10) Asking Smart Questions

(28:58) Professional Reputation

Helpful Links & Resources:

Episode 256. Career Tips for New Technicians

Episode 224. The Key To Finding New Career Opportunities as a Technician

Episode 169: Leadership Insights: Work Ethic and Value Creation with Scott Farley of The Arcticom Group

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

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In this episode, I'm sharing the top seven basics every supermarket refrigeration technician needs to master. These encompass the fundamentals like superheat, subcooling, compression ratio, refrigerant flow, wiring diagrams, ladder diagrams, P&IDs, refrigeration schedules and sequence of operations. We'll also discuss safe electrical troubleshooting and proper meter use, understanding rack operation and the importance of controls, sensors, and communication networks. Revisiting these basics - no matter how long you'be been in the industry - are crucial to eliminating guesswork, diagnosing issues more confidently, cutting troubleshooting time and reducing callbacks.

In this episode, we cover:

(00:48) Seven Basics of Supermarket Refrigeration

(00:55) Refrigeration Fundamentals

(02:09) Electrical Diagrams

(04:20) Meter Skills

(05:09) Supermarket Rack Operation Basics

(06:44) Case Components

(07:17) Refrigeration Controls

(11:18) Building Troubleshooting Habits

(13:43) Safety on Refrigeration Job Sites

Helpful Links & Resources:

CO2 Unfiltered

Episode 395. Basics of Refrigeration: Importance of Revisiting the Fundamentals

Episode 299. Basic Refrigeration 101

Episode 37. Refrigeration Fundamentals and Troubleshooting Training with HVAC Know It All