2-2 ELECTRICAL / REFRIGERATION
P/N 3141959_C U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
REFRIGERATION SYSTEM
FUNCTIONALITY
These cases can be used for medium or low
temperature applications and comply with
NSF 7 for medium temperature applications
and frozen food. FNGSC-A models are
self-contained and have a controller that
automates the refrigeration cycle and the
defrost cycle.
During refrigeration mode, the discharge line
solenoid valves (RSV1, RSV2) are energized
and held open, allowing the gas to flow
through each condenser.
Once the refrigerant is in a liquid, a capillary
tube is used as an expansion device that feeds
each evaporator. The darker arrows and
lines (left side) show the refrigerant direction
through circuit #1, and the lighter arrows and
lines (right side) show the refrigerant direction
of circuit #2.
During refrigeration mode, hot gas solenoid
valves, (HGSV1, HGSV2) are deenergized and
(closed).
System Diagram Refrigeration Mode (FNGSC8A)
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