many trades, refrigeration is uniquely challenging and interesting.
The thing that makes this such a challenge is the fact that the
process takes place out of sight. Solving refrigeration problems
takes on a kind of nerdy "who-done-it" process. You
can't see with your eyes what is going on, so you have to rely
on test instruments, reference data, symptoms, and a "solid
base" understanding of refrigeration theory to be able to
seen valuable refrigeration equipment destroyed because so-called
"technicians" didn't know what they were doing. We've
also seen HVAC technicians condemn perfectly good equipment because
they didn't have that "solid base" understanding of
refrigeration that would have allowed them to find the real problem.
successful refrigeration technicians mentally put themselves into
the process. They start to think like a molecule of refrigerant.
They visualize themselves racing through the various circuits
of a refrigeration system, picking up heat energy here, giving
off heat energy there, changing from a liquid to a gas, and visa-versa.
They compare what is happening with what should be happening.
It's this "think like a molecule of refrigerant" that
allows them to solve the problems that others can't.
with EPA Certification"
is a "Solid Base" 4 evening 16 hour fundamentals course
that is loaded with useful information. For the duration of each
class, we hammer home refrigeration theory until every person
starts thinking like that molecule of refrigerant. We cover every
nook and cranny of the typical air conditioner until we know the
systems inside and out. The meaning of terms like saturation,
super heat, sub cooling, enthalpy, slugging, fixed bore metering
devices, thermal expansion valves, pressure drops, and flash gas
will become crystal clear. The fifth evening (4 hours) will be
for final review of EPA regulations, and taking the EPA test.
· Heat energy
· Sensible and Latent heat
· Understanding fluids and why they flow
· What is a refrigerant
· A close look at refrigerants
including R-22 & R-410a
· Metering devices
The PT chart ~ what is its function, what are its limitations
Depth Study of the Refrigeration Cycle
· Where will we
find saturated liquids and vapors
· Where we will find superheated vapor, sub-cooled liquid,
and both liquid & vapor
· How does a refrigeration respond to changing conditions
· Charging a refrigeration
Introduction to troubleshooting AC & refrigeration systems
Prep & test
· Review need for EPA certification
· Study why Ozone is being depleted
· Review study guide
· Take and review answers to several practice exams
EPA test will be given during the final meeting