There was a time, believe it or not, when vocational education was important. According to Marc Bridgens, associate professor of hvacr at Pennsylvania College of Technology, vocational education can be traced back to the 1600s and it hit its height in the 1970s.
Energy Management Specialists (Cleveland, OH), Olson Energy Services (Seattle, WA), Corbin Comfort Systems (Lake City, GA), and Seaman’s Air Conditioning & Refrigeration (Grand Rapids, MI) were the big award winners at the Air Conditioning Contractors of America’s (ACCA) 34th annual conference.
Over the years, as the number of employees increased at J & J Air Conditioning Inc. in San Jose, CA, owner Jerry Hurwitz felt a need to keep his mechanics up to date and on the “leading edge.” Hurwitz put his love of education and his years of professional teaching into practice by developing a series of in-house training classes. This eventually led to the establishment of Air Conditioning Instructional Research (AIR) in 1983.
Capillary tubes are generally used as the metering device on small, fractional-horsepower refrigeration systems. Charging these systems with refrigerant requires a different procedure than those systems using a thermostatic expansion valve.
R-410A has been called the air conditioning refrigerant of the future and the long-term HFC replacement for R-22. But 410A is also turning up in refrigeration applications. One example is an ice rink in the Netherlands.