HVAC School - For Techs, By Techs
Training Refrigeration: Building Technicians Who Think, Not Just Fix - Short #283
· Summarized
Key takeaways
- Develop technicians who understand the 'why' behind their work by mastering components, system flow, and electrical diagrams.
- Patience and ongoing education are crucial—learning is a process, and support networks are valuable resources.
- Hands-on experience with systems, combined with reading documentation and support from manufacturers, accelerates learning, especially for complex systems like CO2.
- Supermarket refrigeration work is challenging but rewarding, and understanding system tuning and proper startup procedures is essential.
- Staying current with industry advancements, such as control systems and high-pressure technologies, benefits technicians and companies alike.
Summary
Building Technicians Who Think, Not Just Fix
The podcast emphasizes the importance of developing refrigeration technicians who understand the 'why' behind their work. Key to this is mastering components, P&IDs, electrical diagrams, and system flow to enable critical thinking and effective troubleshooting. Billy Carlson shares his approach, which includes training team members on reading schedules, understanding sequence operations, and tuning control systems, to foster deeper knowledge and confidence in managing complex refrigeration systems.
Learning and Working with CO2 Refrigeration
Billy discusses his journey into CO2 refrigeration, including the challenges of handling high-pressure systems, avoiding dry ice formation, and proper charging procedures. He shares practical tips like isolating cores, warming them in systems, and using sight glasses, along with the importance of patience and support from manufacturers' tech teams. His experiences highlight ongoing learning curves and the need for support networks to master CO2 systems.
Supermarket Rack Work: Challenges and Rewards
Billy explains the pressures of maintaining supermarket rack systems, which can be crucial for entire store operations. He discusses the complexities of working with multiple compressors, high system pressures, and the importance of proper startup, tuning, and adjustments like slowing ramp rates. The conversation underscores the uniqueness of supermarket refrigeration and the satisfaction in troubleshooting and ensuring system reliability.
Effective Training and Support for Technicians
The episode explores Billy’s method of training his team, from hands-on component identification to reading electrical and refrigeration diagrams. He notes the importance of patience, ongoing education, and leveraging resources such as manufacturer support, online communities, and documentation. The value of teamwork and seeking help when necessary is emphasized, as well as the importance of passing knowledge to future technicians.
Future Trends and Industry Insights
Billy shares his excitement about upcoming innovations like ejectors, higher system pressures, and the potential for relocating components (e.g., putting gas coolers on the roof). He discusses improvements in control systems, communication protocols, and the need for technicians to become familiar with digital controls and networking. His focus on continuous learning and adapting to technological advances highlights the evolving landscape of refrigeration technology.
Sponsors
- Carrier · Carrier has their new green speed extreme super high efficiency heat pumps out on the market now, find out more by going to Carrier.com.
- Refrigeration Technologies · Refrigeration Technologies at refrigertech.com.
- Navac · Navac at navaclobal.com.
- Santa Fe Dehumidifiers · Santa Fe dehumidifiers in the all-new Ultra V155 whole home dehumidifier. Features include a size reduction of 40%, an 8-inch ventilation duct, and a powerful fan for tight space installation. It helps meet fresh air requirements and is backed by a 6-year warranty.
Show notes
Training the refrigeration technician is about building technicians who think, not just fix. In this engaging conversation from the 7th Annual HVAC/R Training Symposium, host Trevor Matthews sits down with Billy Carlson to explore what it really takes to develop technicians who think critically and troubleshoot effectively.
Billy shares his journey in the HVAC/R industry, from residential air conditioning to commercial refrigeration, and ultimately specializing in supermarket rack systems and CO2 refrigeration. With only five years in the grocery sector, his company now dedicates 70-80% of its work to refrigeration, with 40% focused on rack systems. This rapid transition offers valuable insights for contractors looking to expand into commercial refrigeration.
Key Topics Covered:
- Building Technicians, Not Just Fixers - Why understanding component flow, P&IDs, and electrical diagrams is crucial for developing thinking technicians rather than parts changers
- CO2 Refrigeration Training - Billy's honest account of learning CO2 systems, including challenges with dry ice formation, charging procedures, and system tuning
- Supermarket Rack Work - The unique pressures and rewards of maintaining systems that hold entire stores, including HFC and CO2 racks with multiple compressors
- Effective Training Methods - Billy's approach to teaching his five-person team, from component identification to reading refrigeration schedules and understanding sequence of operations
- Fine-Tuning Systems - Insights on slowing down ramp rates, adjusting flash tank pressure, and the importance of proper startup commissioning time
- Controls & Communications - Why modern refrigeration technicians need to understand networking, gateways, and digital controls alongside traditional refrigeration knowledge
Billy emphasizes that patience and willingness to ask for help are essential traits for anyone entering supermarket refrigeration. He shares practical tips on charging CO2 systems, avoiding dry ice in lines, working with VFDs, and reading trend graphs to optimize system performance.
Whether you're a residential tech considering commercial refrigeration, a trainer developing curriculum, or a service manager building a team, this conversation offers real-world wisdom on creating technicians who understand the "why" behind every repair.
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