Operation; Bin Thermostat And Evaporator Low Temperature Safety Adjustment Chart; Uff0200/Unf0200/Unp0200/Uff0350/Ufp0350/Unf0300/Unp0300 Operation; Rff0320/Rnf0320/Rfp0320/Rnp0320 Operation - Manitowoc RFF Installation, Operation And Maintenance Manual

NOTE: Flake and nugget ice machines use an auger to
remove ice from the evaporator. Occasional noises (creaks,
groans, squeaks, or pops) are a normal part of the ice making
process.
Bin Thermostat and Evaporator Low Temperature
Safety Adjustment Chart
The bin thermostat sensing bulb is located in the ice chute
or bin and turns the ice machine on and off as the level
of ice in the ice chute or bin changes. The evaporator low
temperature safety protescts the evaporator and compressor
from damage caused by water loss or gear motor failure.
Bin Thermostat
Model
UNF0200
UNP0200
UFF0200
UFP0200
UNF0300
UNP0300
RFF0320
RNF0320
RNP0320
UFF0350
UFP0350
RNF0620
RNP0620
RFF0620
RFP0620
RNF1020C
RNF1100
RNP1100
RFF1220C
RFF1300
RNF2000C
RFF2200C
RFF2500
* Indicates preliminary data
4
3 5
SMALL NUMBERS = LESS ICE IN BIN
6
2
LARGE NUMBERS = MORE ICE IN BIN
7
1
4
EVAPORATOR LOW TEMPERATURE
3
5
6
2
INCORRECT SETTINGS WILL CAUSE ICE MACHINE
7
1
Part Number 000017542 Rev 00 8/22
Evaporator
Setting Thermostat Setting
5 5
*5 *5
5 5
*5 *5
5 6
*5 *6
3 7
3 6
*3 *6
5 7
*5 *7
2 ---
*2 ---
3 ---
*3 ---
3 ---
3 ---
*3 ---
3 ---
3 ---
*3 ---
3 ---
3 ---
BIN THERMOSTAT
SAFETY THERMOSTAT
TO SHUT OFF
Section 3

Operation

UFF0200/UNF0200/UNP0200/UFF0350/UFP0350/
UNF0300/UNP0300 Operation
The ice machine will not start until:
A. The rocker switch is moved to "ON".
B. Ice does not contact the bin thermostat bulb.
C. The water reservoir is full of water.
Placing the toggle switch in the ON position starts the gear
motor and refrigeration system. The float valve controls the
water inlet valve and water level. The freeze cycle ends when
ice contacts the bin thermostat. The ice machine will restart
when ice no longer contacts the bin thermostat.

RFF0320/RNF0320/RFP0320/RNP0320 Operation

The ice machine will not start until:
A. The rocker switch is moved to "ON".
B. Ice does not contact the bin thermostat bulb.
C. The water reservoir is full of water.
Placing the toggle switch in the ON position starts the
gear motor and a 8 minute compressor time delay. The
compressor starts and the float valve controls the water
inlet valve and water level. The freeze cycle ends when ice
contacts the bin thermostat. The ice machine remains off
until ice no longer contacts the bin thermostat.
BIN THERMOSTAT
EVAPORATOR
THERMOSTAT
SENSING BULB IS
LOCATED IN BIN
BIN THERMOSTAT
LOCATION
EVAPORATOR LOW
TEMPERATURE SAFETY
THERMOSTAT LOCATION
23