Residential & Rack Startup and Commissioning (Part 2)

HVAC School - For Techs, By Techs

In this episode, Bryan and Max discuss commercial supermarket startup and commissioning with comparisons to residential HVAC work. Max, who has transitioned from residential air conditioning to supermarket refrigeration, shares his insights on the unique challenges and requirements of this specialized field.

The conversation begins by emphasizing the critical importance of safety in supermarket refrigeration work. Unlike residential jobs, technicians often work alone in potentially hazardous environments with high-voltage equipment and large quantities of refrigerant. Hearing protection is stressed as a crucial safety measure due to the extremely loud environments in motor rooms.

Max then delves into the complexities of supermarket refrigeration systems, describing the various components involved, including parallel compressor racks, refrigerated cases, and multiple control systems. He highlights the need for adaptability and problem-solving skills, as technicians often encounter unique situations with limited documentation or manufacturer support. The discussion also covers the time-sensitive nature of the work, with many tasks needing to be completed overnight to minimize disruption to store operations.

The podcast explores the multifaceted role of a supermarket refrigeration technician, touching on topics such as equipment decommissioning, pressure testing, electrical verification, and programming of control systems. Max emphasizes the importance of developing a comprehensive process and continuously refining it to improve efficiency and effectiveness in the field.

Key topics covered in the podcast:

• Safety considerations in supermarket refrigeration work
• Components of commercial refrigeration systems (compressor racks, cases, controls)
• Time constraints and overnight work in supermarket settings
• Decommissioning old equipment and installing new systems
• Pressure testing and leak checking procedures
• Electrical verification and three-phase power considerations
• Programming and verifying control systems
• Defrost cycle setup and verification
• Communication protocols and building management systems
• Performance audits and client expectations
• Low ambient controls and regional differences in system requirements
• Leak detection and walk-in cooler maintenance
• The importance of developing and refining work processes
• Transition from residential HVAC to commercial refrigeration

Have a question that you want us to answer on the podcast? Submit your questions at https://www.speakpipe.com/hvacschool.

Purchase your tickets or learn more about the 6th Annual HVACR Training Symposium at https://hvacrschool.com/symposium. Subscribe to our podcast on your iPhone or Android. Subscribe to our YouTube channel. Check out our handy calculators here or on the HVAC School Mobile App for Apple and Android.