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168 Part Number: 000015431 Rev 02 6/20
SUCTION ACCUMULATOR OPERATION
Liquid refrigerant collects in the suction accumulator
during the harvest cycle and is removed during the freeze
cycle. The liquid refrigerant is returned to the compressor
through a screen and orifice in the suction accumulator
J tube. Passing the liquid through the orifice causes a
pressure drop; the liquid flashes to a vapor and creates
a refrigeration affect. It is normal to see frost on the
accumulator, suction line and compressor suction port
in the freeze cycle. The suction accumulator empties
within the first 5 minutes of the freeze cycle. When the
refrigeration affect ends (liquid refrigerant has been
removed), the suction line between the accumulator and
compressor will increase in temperature. The suction line
temperature increases 20 plus degrees within 2 minutes
after the liquid has been removed.
1
Minute
2
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3
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4
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5
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6
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7
Minutes
8
Minutes
Temperature Increases
20+ºF (11+ºC)
The time needed to remove the liquid refrigerant will
vary with the ambient temperature and the length of the
harvest cycle. Higher ambient temperatures = shorter
harvest cycles, faster removal of liquid refrigerant from
the accumulator and greater suction line temperature
increases.
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