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S
3-10
TARTUP
Refrigeration Controls
Model
Application
Product Application
Med Temp - DOE
AP1
FNGSC8A
Med Temp - NSF 7 Type 1 20 ° F to 38 °F ( -6 ° C to 3 °C )
**AP1
Frozen Food - DOE
**AP2
AP1
Med Temp - DOE
FNGSC6A
**AP1
Med Temp - NSF 7 Type 1 16 ° F to 40 ° F ( -8 ° C to 4 °C )
**AP2
Frozen Food - DOE
AP1
Med Temp - DOE
FNGSC4A
**AP1
Med Temp - NSF 7 Type 1 20 ° F to 38 °F ( -6 ° C to 3 °C )
**AP2
Frozen Food - DOE
Notes:
The cases are pre programmed with
AP2 as default, which is low temp
frozen food application .
If the customer needs Medium temp
application, the default settings are to
comply with NSF 7 Type 1 .
The controller controls refrigeration temperature
and is factory installed inside the control panel .
Adjust the control to maintain the discharge
air temperature shown above . Measure dis-
charge air temperatures at the center of the
discharge louver .
P/N 3141959_C
/ O
PERATION
Controls and Adjustments
Tripping
Discharge Air Temperature
Dif ( ° F )
25 ° F to 43 °F ( -4 °C to 6 °C )
18
18
´-19 to -9 ° F (-28 to -22 ° C )
10
22 ° F to 46 ° F ( -5 °C to 8 °C )
24
24
´-19 to -9 ° F (-28 to -22 ° C )
10
26 ° F to 44 ° F ( -3 °C to 7 °C)
18
18
´-19 to -9 ° F (-28 to -22 ° C )
10
Example of FNGSC8A (Low Temp.)
U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
Defrost Controls
Controller
Defrost Frequency
Set Point ( ° F )
24 to 25 ° F ( -4 to -3 ° C )
18 to 20 ° F ( -7 to -6 ° C )
´-20 to -19 ° F ( -29 to -28 ° C )
21 to 22 ° F ( -6 to -5 ° C )
15 to 16 ° F ( -9 to -8 ° C )
´-20 to -19 ° F ( -29 to -28 ° C )
24 to 26 ° F ( -4 to -3 ° C )
18 to 20 ° F ( -7 to -6 ° C )
´-17 to -16 ° F ( -27 to -26 ° C )
Example of FNGSC8A (Medium Temp.)
Defrosts are time initiated and temperature
terminated for self-contained models . The defrost
settings are factory set as shown above .
To ensure a thorough defrost, defrost must be
terminated by the temperature termination
setting — not by time .
Type of
Temp.
( per day )
Defrost
Termination
45 ° F ( 7 ° C )
3
45 ° F ( 7 ° C )
38 ° F ( 3 ° C )
45 ° F ( 7 ° C )
3
Hotgas
45 ° F ( 7 ° C )
38 ° F ( 3 ° C )
45 ° F ( 7 ° C )
3
45 ° F ( 7 ° C )
38 ° F ( 3 ° C )
Failsafe
Time ( min )
50
50
50
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