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The temperature control is set to cut in at 38 degrees F. The Temp control cuts out at 16 degrees
F at the coldest setting' COLD' and 28 degrees F at the warmest setting, '1' on the control dial.
The temp control turns off the refrigeration system when the control is turned all the way
counterclockwise.
Defrost Cycle
The Ranco control is programmed to initiate defrost via two different methods. There are 3
programmed defrost cycles in the case which will initiate a defrost cycle every 8 hours. The unit
does not have a time clock so the defrost cycles cannot be set for any specific time of day.
The unit also has an 'On demand' defrost feature that will initiate a defrost when the temperature
differential between the evaporator temperature and the air temperature is more than 12 degrees
for 5 minutes after 30 minutes into the refrigeration cycle. Once initiated the defrost cycle will
terminate when evaporator coil sensor reaches 43 degrees F.
Control Factory Settings
The control parameters are set at the factory and cannot be manually changed in the field.
Control parameter changes can only be made by downloading a new set of parameters via a
program chip supplied by Federal Industries
E3380
TAB
REF
CONFIGURATION
SET-POINTS
DISPLAY
PARAMETER
DESCRIPTION
Controller
Operation
1
Temperature
Units
Defrost
Termination
4
Method
8
Cut-In Warm
9
Cut-Out Warm
10
Cut-In Cold
11
Cut-Out Cold
Comp
13
Minimum On
Time
Defrost Display
Lock (display
15
indication
during defrost)
11/10/11
FACTORY
LPRSS
DEFAULT
Fahrenheit
Evaporator
Sensor
14ºF
40ºF
-4ºF
34ºF
-2ºF
40ºF
24ºF
10min
1 min
0 sec
Lock
Display at
Temp.
Show
reading
current
prior to
temp
defrost.
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