2-4 ELECTRICAL / REFRIGERATION
P/N 3141959_C U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
System Diagram Defrost Mode Hot Gas Bypass (FNGSC8A)
REFRIGERATION SYSTEM
FUNCTIONALITY (Continued)
During defrost mode, the defrost solenoid
valves ( HGSV1 and HGSV2 ) are energized
and held open allowing the gas to be redirected
through each evaporator inlet. The evaporator
is split and circuited for 2 refrigeration circuits.
Defrost cycle is temperature-terminated with
a failsafe that is 45 minutes. Normally only 3
defrost per day are required.