Supermarket Refrigeration Troubleshooting HVAC Excellence Conference April 1, 2014 Rolf Blom Sporlan Division of Parker Hannifin Teaching Supermarket Refrigeration • Demand for “supermarket” technicians • Schools not including commercial refrigeration in their program…Why? – Knowledge – Costs – Space Teaching Supermarket Refrigeration • Where do you get the knowledge? • Is it possible to teach without the equipment? Teaching Supermarket Refrigeration • Yes it is possible to incorporate into your program! • Can be done on a minimal budget • Can be done with minimal space First Step - Educate Yourself • Get familiar with the systems • Don’t let them intimidate you! Educate Yourself • Break the system down into sections subsystems • Learn the operation of the subsystems • Bring subsystems together Educate Yourself • Get familiar with systems – Partner with local supermarket – Partner with local contractors • Partner with manufacturers – System manufacturers – Component manufacturers Educate Yourself • Attend seminars – System manufacturers training – Sporlan Supermarket Seminar – Sporlan instructors training Develop Glossary of Terms & Acronyms • Very important! • Many different terms for same meaning – Example: A8 is a valve model number for a Refrigeration Specialties pressure regulating valve. The term “A8 valve” is used in reference to a head pressure control valve which is also referred to as “Hold Back Valve”, “Flooding Valve”, “Stacking Valve” Utilize Diagrams Utilize Diagrams • “Map” of the system Utilize Diagrams • • • • Rack diagram Condenser diagram Circuit diagram Piping diagrams Interpret Diagrams • Understand flow & operation • Generate your own diagram Utilize Refrigeration Schedules Refrigeration Schedules • Known as the “RS” • The “directions” to the “map” • Lists all the information for the refrigeration system • Engineers use it to design/build systems • Key item for teaching supermarket systems! System Components • Break subsystems down to individual components • Teach operation & function Component Operation • • • • Purpose in system Location How they operate Component operation – Cut-away view – Disassemble Components • Ask wholesalers & manufacturers for samples or warranty return parts • Have students disassemble components • Hands on learning Components • Component Identification Exercise – Partner with supermarket – Number tags attached to components on a system – Students match tag number to component description “Show & Tell” Demo Rack • • • • • • Build a mock display refrigeration rack Stand alone for “show & tell” Use old “retired” racks Valuable when teaching subsystems No electrical or refrigeration lines connected Make it mobile Teach Subsystems • • • • • • • • Oil management Defrost system High side system Compressor system Cases Low side system Electrical EMS Teach Control Systems • Energy Management System – EMS – The control system for supermarkets – Controls refrigeration, HVAC, & lighting – Utilize EMS demos – Students learn to navigate system, change settings, programming Refrigeration EMS HVAC EMS Trouble Shooting Supermarket Systems • You don’t have an operating system? • How do you teach trouble shooting skills? Utilize Simulators • Allows student interaction • Students use skill sets applied to real systems – Mechanical – Electrical – Controls • Instructors able to tract students actions, procedures, thought process Mechanical System Mechanical System Electrical System Electrical System Conclusion - Yes It Can Be Done!!! • Include supermarket systems in your program – Be creative – Ask for help – Keep learning!!! Questions??? Thank You!!!