Teaching Supermarket Refrigeration

Report
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
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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
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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
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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
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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!!!

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