Unit 3 Flashcards
Match the refrigerant cylinder with the correct color code
R408a
medium purple
Match the refrigerant cylinder with the correct color code
R290
white
Match the refrigerant cylinder with the correct color code
R410a
rose
Match the refrigerant cylinder with the correct color code
R404a
orange
Match the refrigerant cylinder with the correct color code
R407a
green
Match the refrigerant cylinder with the correct color code
R407c
medium brown
Match the refrigerant cylinder with the correct color code
422d
bright green
Match the refrigerant cylinder with the correct color code
R401a
pink
Match the refrigerant cylinder with the correct color code
R433a
blue
What is another word for flash gas?
adiabatic gas
What is the meaning of THOR?
Amount of heat rejection (cooling) produced in a system. Total heat of rejection.
How will high discharge temperatures affect your compressor?
This causes the oil to burn. High head pressures. Metals inside the motor can strip and cause the compressor to seize. Worn rings and acid formation.
Name the 4 positive displacement compressors.
rotary, scroll, reciprocating, screw
When engineers design air conditioning units, what parameters are used?
Inside/outside air temp, evap coil temp, evap leaving temp
What temperature will the Hawaii Health Department use to gauge med Temp, chill boxes and low temp freezer?
Med- 35-39 degrees
Low- 0 degrees
Chill- negative 15 degrees
How are refrigeration compressors rated?
horsepower
Where are evaporators fed from and why?
From the bottom and exits the top. This keeps liquid to the bottom. As a liquid boils off it exits the top and reduces liquid from getting to the compressor.
What type of equipment will you find R410 a refrigerant in?
Residential and commercial. Ductless split, central and package units. High temp.
What type of equipment will you find R407C refrigerant in?
Medium temp systems. Refrigerator and chill box.
What type of equipment will you find R134 a refrigerant in?
Medium and high temp systems. Commercial, residential and industrial.
What type of equipment will you find R32 refrigerant in?
Newer high temp equipment. Replacement for R410a.
The ____________ is another positive displacement compressor and is used for large air conditioning and refrigeration applications.
Screw compressor
The _____________ is referred to as a kinetic displacement compressor.
Centrifugal compressor
Matching
________ rejects, both sensible and latent heat from the refrigeration system
Condenser
