Systems and Components of Domestic Refrigerators and Freezers Flashcards
Most compressors used in domestic refrigerators use ____ motors.
split-phase
(T/F) The fuse or circuit breaker in an individual circuit should open in the event of continuous overload of more than 5%.
False
25%
(T/F) During startup, most motors used in domestic appliance compressors draw a current of only 60% of the running load.
False
600%
A device wired in series with a compressor’s motor windings that protects it from overload by increasing resistance with increasing temperature is a ____.
PTC thermistor
positive temperature coefficient = PTC
(T/F) The electrical cords for domestic refrigerators are insulated to withstand twice their normal voltage.
True
A condenser that uses tubes in direct contact with the outer wall of the cabinet so that the outer walls serves as a heat sink is a ____ condenser.
hot-wall
A forced-air condenser arrangement that takes air in along the front of the refrigerator and expels the air out of the back is commonly called a(n) ____ condenser.
single-pass
What type of metering device do most domestic refrigerators use?
Capillary Tube
Domestic systems use a(n) ____ to prevent moisture from entering the metering device where it could freeze and cause clogging.
filter-drier
Heat is absorbed inside of the cabinet when refrigerant passes through the ____.
evaporator
What is the fixed temperature range commonly used for domestic refrigerator cabinets?
37 f to 41 F
Low-wattage electric heaters installed around the door opening to prevent condensation from forming are called ____ heaters.
mullion
Installed around the door openings, a ____ loop prevents condensation using the heat produced during the compression of the system’s refrigerant.
post-condenser
What are the 3 phases of operation for an automatic ice maker?
Fill
Freeze
Harvest
