2014 NHETC Program - page 30

29
8:30 a.m. - 10:00 a.m.
CEU Value .02
Putting System Symptoms Into Perspective
Jamie Kitchen, Danfoss
Napa Room D
We have all heard that most warranty returns have nothing wrong with them. While this is
partly true, the reality is that the majority of returned components that have failed, have
generally failed for reasons that could have been identified during start-up, commissioning, or
preventative maintenance sessions. This session will highlight and walk through a system and
its components and highlight what to look for so that the replacement component will not fail
like the original did. Topics such as oil return, start components, interpreting how load and
ambient conditions affect superheat and sub-cooling values and how to set pressure-
temperature controls based on application envelopes etc. This module will make a good lesson
plan for teaching the methodology of eliminating possible causes of failure so that the service
technician can focus on the most likely causes while minimizing the chance of failure in the
future.
10:15 a.m. - 11:45 a.m.
CEU Value .02
Supermarket Refrigeration Troubleshooting
Rolf Blom, Sporlan
Sonoma Room A
Supermarket refrigeration troubleshooting and theory-of-operation is often inadequately taught
or isn't taught at all in many schools. This is primarily because most labs don't have the
equipment to properly demonstrate or provide hands-on service training for these systems. This
session will address the importance of including supermarket refrigeration in your curriculum,
and cover the basic concepts and components of a typical system. In addition, some important
teaching solutions will be offered, including the use of a computer-based supermarket
refrigeration simulator, which will be demonstrated to the attendees.
Getting the Thermo in Expansion Valves
Steve Maxon, Parker Hannifin
Sonoma Room B
This session will help attendees gain a full understanding on the operation of the TXV. Mr.
Maxon will start off with a few refrigeration basics, explore the anatomy of the valve, and then
fully discover how the valves work using pressures and math. He will then show how the
various pressures can affect the operation of the valve.
Split System Piping
Edwin Swisher, United Association
Sonoma Room C
This session will cover some new rules, and how an installation may effect sub-cooling,
metering device sizing, need for added electrical components, traps & inverted traps; plus some
piping system precautions along with creative solutions for some bad jobs and much more.
Tuesday April 1, 2014
2014
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