What is the primary function of the condenser? - ANSWER - Reject heat from the
refrigerated space
Why does the suction vapor have to be increased in temperature before it can be
condensed? - ANSWER - So the condensing temperature is above ambient
How can the temperature of refrigerant be increased without adding excessive
heat? - ANSWER - Raise the pressure of the refrigerant
What are the three phases of the condenser? - ANSWER - De-superheat, condense,
and subcool
Where does the superheat in discharge gas come from? - ANSWER - Suction vapor
heat, compressor motor heat, and heat of compression
When does condensing start? - ANSWER - When the discharge gas is cooled to its
condensing temperature
What is subcooling and what does it indicate? - ANSWER - Subcooling is cooling the
liquid refrigerant below its condensing temperature
After the vapor has been condensed to a liquid, what are two causes for the liquid to
flash back into vapor before it reaches the metering device? - ANSWER - A rise in
temperature or a fall in pressure
If a ⅜" liquid line has a vertical lift of 40 feet, how much pressure drop is there? -
ANSWER - 20 PSIG
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