One of the major components in any refrigeration system is the evaporator, and there are several types of direct expansion (DX) evaporators that can be used.
There are advantages and disadvantages to being a refrigeration technician. The industry needs to work together to reduce the disadvantages and expand the opportunities, so that people want to make a career in refrigeration service and installation.
There are several reasons why the compressor discharge temperature of a refrigeration system can be high when the condensing temperature is not, and a checklist can help a technician figure out the root problem.
Service technicians need to be careful when reading the pressure/temperature chart because if they choose the wrong values, they will make mistakes diagnosing the system.
The HVACR industry will soon be using low-GWP refrigerant blends, some of which have a temperature glide when evaporating and condensing. As these refrigerant blends change phase, there’s a change in their composition, which technicians must be able to calculate while in the field.