–124–
vapor refrigerant leaves the evaporator and passes
through the heat exchanger absorbing additional heat
from the liquid line. The suction vapor returns to the
condensing unit, passes through the suction
accumulator and enters the compressor.
HARVEST CYCLE
The head pressure control valve bypasses the
condenser and sends compressor discharge gas
directly to the receiver. The discharge gas keeps the
recitative warm and the refrigerant pressure up as
liquid refrigerant is boiled off the receiver. Vapor from
the top of the receiver flows through the cool vapor
valve and condenses in the evaporator. The change of
state of the refrigerant from vapor to liquid releases the
heat necessary for the harvest cycle. The refrigerant
returns to the condensing unit and enters the suction
accumulator. Vapor refrigerant is returned to the
compressor.
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