Manitowoc RFF Series User manual

Part Number 000015433_05 3/21
Flake & Nugget Models
RFF/UFF/RNF/UNF Ice Machines
Technician’s Handbook

Safety Notices
Read these precautions to prevent personal injury:
• Read this manual thoroughly before operating,
installing or performing maintenance on the
equipment. Failure to follow instructions in this
manual can cause property damage, injury or death.
• Routine adjustments and maintenance procedures
outlined in this manual are not covered by the
warranty.
• Proper installation, care and maintenance are essential
for maximum performance and trouble-free operation
of your equipment.
• Visit our website www.manitowocice.com for manual
updates, translations, or contact information for
service agents in your area.
• This equipment contains high voltage electricity and
refrigerant charge. Installation and repairs are to be
performed by properly trained technicians aware of
the dangers of dealing with high voltage electricity
and refrigerant under pressure. The technician
must also be certified in proper refrigerant handling
and servicing procedures. All lockout and tag out
procedures must be followed when working on this
equipment.
• This equipment is intended for indoor use only. Do not
install or operate this equipment in outdoor areas.
• As you work on this equipment, be sure to pay close
attention to the safety notices in this handbook.
Disregarding the notices may lead to serious injury
and/or damage to the equipment.

nWarning
Follow these electrical requirements during installation
of this equipment.
• All field wiring must conform to all applicable
codes of the authority having jurisdiction. It is
the responsibility of the end user to provide the
disconnect means to satisfy local codes. Refer to
rating plate for proper voltage.
• This appliance must be grounded.
• This equipment must be positioned so that the plug
is accessible unless other means for disconnection
from the power supply (e.g., circuit breaker or
disconnect switch) is provided.
• Check all wiring connections, including factory
terminals, before operation. Connections can
become loose during shipment and installation.

nWarning
Follow these precautions to prevent personal injury
during installation of this equipment:
• Installation must comply with all applicable
equipment fire and health codes with the authority
having jurisdiction.
• To avoid instability the installation area must be
capable of supporting the combined weight of the
equipment and product. Additionally the equipment
must be level side to side and front to back.
• Remove all removable panels before lifting and
installing and use appropriate safety equipment
during installation and servicing. Two or more
people are required to lift or move this appliance to
prevent tipping and/or injury.
• Do not damage the refrigeration circuit when
installing, maintaining or servicing the unit.
• Connect to a potable water supply only.
• This equipment contains refrigerant charge.

nWarning
Follow these precautions to prevent personal injury
while operating or maintaining this equipment.
• Refer to nameplate to identify the type of refrigerant
in your equipment.
• Only trained and qualified personnel aware of the
dangers are allowed to work on the equipment.
• Read this manual thoroughly before operating,
installing or performing maintenance on the
equipment. Failure to follow instructions in this
manual can cause property damage, injury or death.
• Crush/Pinch Hazard. Keep hands clear of moving
components. Components can move without
warning unless power is disconnected and all
potential energy is removed.
• Moisture collecting on the floor will create a
slippery surface. Clean up any water on the floor
immediately to prevent a slip hazard.

nWarning
Follow these precautions to prevent personal injury
while operating or maintaining this equipment.
• Objects placed or dropped in the bin can affect
human health and safety. Locate and remove any
objects immediately.
• Never use sharp objects or tools to remove ice or
frost.
• Do not use mechanical devices or other means to
accelerate the defrosting process.
• When using cleaning fluids or chemicals, rubber
gloves and eye protection (and/or face shield) must
be worn.
DANGER
Do not operate equipment that has been misused,
abused, neglected, damaged, or altered/modified
from that of original manufactured specifications. This
appliance is not intended for use by persons (including
children) with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge,
unless they have been given supervision concerning
use of the appliance by a person responsible for their
safety. Do not allow children to play with, clean or
maintain this appliance without proper supervision.

nWarning
Follow these precautions to prevent personal injury
during use and maintenance of this equipment:
• It is the responsibility of the equipment owner to
perform a Personal Protective Equipment Hazard
Assessment to ensure adequate protection during
maintenance procedures.
• Do Not Store Or Use Gasoline Or Other Flammable
Vapors Or Liquids In The Vicinity Of This Or Any
Other Appliance. Never use flammable oil soaked
cloths or combustible cleaning solutions for
cleaning.
• All covers and access panels must be in place and
properly secured when operating this equipment.
• Risk of fire/shock. All minimum clearances must be
maintained. Do not obstruct vents or openings.
• Failure to disconnect power at the main power
supply disconnect could result in serious injury or
death. The power switch DOES NOT disconnect all
incoming power.
• All utility connections and fixtures must be
maintained in accordance with the authority having
jurisdiction.
• Turn off and lockout all utilities (gas, electric, water)
according to approved practices during maintenance
or servicing.

Table of Contents
Part Number 000015433_05 3/21 9
General Information
Model Numbers ................................. 15
Flake Air & Water-Cooled Models .............15
Nugget Air & Water-Cooled Models ...........15
QuietQube Models with Remote Condensing Unit .
.........................................16
Ice Machine Heat of Rejection.................... 16
Ice Machine Warranty Information ............... 17
Warranty Registration & Claim Procedures .....17
Model/Serial Number............................ 17
Manitowoc Cleaner/Descaler and Sanitizer ....... 18
Installation
Installation Requirements........................ 19
Potable Water Requirements..................... 20
Drain Connections ............................... 20
Ice Machine Clearance Requirements............. 21
Cooling Tower Applications ...................... 21
Electrical Service................................. 22
Voltage...................................22
Fuse/Circuit Breaker ........................22
Ground Fault Interrupter Circuit (GFIC) ........22
Maximum Breaker/Minimum Circuit Amperage
Chart ............................................ 23
RFF/RNF/UFF/UNF Air-cooled Models .........23
RFF/RNF Water-cooled Models ...............23
RFF/RNF QuietQube Model Head Sections......24
RCUF QuietQube Model Condensing Units .....24

10 Part Number 000015433_05 3/21
Maintenance
Cleaning and Sanitizing .......................... 25
Exterior Cleaning...........................25
Detailed Descaling and Sanitizing Procedure ....25
Remedial Cleaning Procedure for Heavily Scaled Ice
Machines........................................ 30
Cleaning the Air filter and Condenser..........32
Removal from Service/Winterization ............. 33
Sequence of Operation
Ice Making Sequence of Operation ............... 35
UFF0200/UFF0350/UNF0200/UNF0300 Operation
.........................................35
RFF0320 & RNF0320 Operation...............35
RNF0620/RFF0620/RNF1100/RFF1300/RFF2500
Operation ................................36
RNF1020C/RFF1220C/RNF2000C/RFF2200C ....37
Thermostat Settings ............................. 39

Part Number 000015433_05 3/21 11
Troubleshooting
UFF0200/UFF0350/UNF0200/UNF0300
Troubleshooting ................................. 41
Self-Contained Air-Cooled ...................41
RFF0320/RNF0320 Troubleshooting .............. 47
Self-Contained Air-Cooled ...................47
RFF0620/RNF0620/RNF1100/RFF1300
Troubleshooting ................................. 53
Self-Contained Air-Cooled ...................53
Rotation Sensor Operation...................53
RNF1020C/RFF1220C Troubleshooting ............ 59
QuietQube Remote Air-cooled Models with
Remote Condensing Unit ....................59
RFF2500 Troubleshooting ........................ 66
Self-Contained Air-Cooled ...................66
Rotation Sensor Operation...................66
RNF2000C/RFF2200C Troubleshooting ............ 73
QuietQube Remote Air-cooled Models with
Remote Condensing Unit ....................73
Refrigeration Troubleshooting.................... 81
Capillary Tube Models ......................81
Thermostatic Expansion Valve Models . . . . . . . . .82
Component Specifications
Bin Thermostat ............................83
Low Temperature Thermostat
Evaporator safety thermostat ................83
High Pressure Cutout (HPCO) Control ..........84
Rotation Sensor............................85
Low Pressure Cutout (LPCO) Control...........86
Fan Cycle Control ..........................86
Total System Refrigerant Charge ..............87
Filter-Driers ...............................88
Suction Cleanup Filter-Drier..................88

12 Part Number 000015433_05 3/21
Charts
Ice Production & Refrigerant Pressure ............ 89
Flake Models .................................... 90
UFF200A .................................90
RFF0320A.................................91
UFF0350A ................................92
RFF0620A.................................93
RFF0620W ................................94
RFF1220C With RCUF1200 ...................95
RFF1300A.................................96
RFF1300W ................................97
RFF2200C With RCUF2200 ...................98
RFF2500A.................................99
Nugget Models .................................100
UNF0200A ...............................100
UNF0300A ...............................101
RNF0320A ...............................102
RNF0620A ...............................103
RNF0620W ..............................104
RNF1020C With RCUF1000 .................105
RNF1100A ...............................106
RNF1100W ..............................107
RNF2000C With RCUF2200 .................108

Part Number 000015433_05 3/21 13
Diagrams
Wiring Diagrams ................................109
Flake Models ...................................110
UFF0200A/UFF350A Air-Cooled .............110
RFF0320A Air-Cooled ......................112
RFF0620A Air-Cooled ......................114
RFF0620W Water-Cooled...................116
RFF1300A Air-Cooled ......................118
RFF1300W Water-Cooled...................120
RFF1220C QuietQube Head Section ..........122
RFF2200C QuietQube Head Section ..........124
RFF2500A Air-Cooled ......................126
Nugget Models .................................128
UNF0200A/UNF0300A Air-Cooled............128
RNF0320A Air-Cooled ......................130
RNF0620A Air-Cooled ......................132
RNF0620W Water-Cooled ..................134
RNF1100A Air-Cooled ......................136
RNF1100W Water-cooled...................138
RNF1020C QuietQube Head Section..........140
RNF2000C QuietQube Head Section..........142
Compressor Start Component Wiring ...........144
UFF0200/UNF0200 ........................144
UNF0300/RFF0320/UFF0350/UNF0350/RFF0620 ..
........................................144
RFF1300/RFF2500.........................145
RFF0620/RNF0620/RNF1100 ................145
Remote Condensing Units.......................146
RCUF Condensing Unit 1ph .................146
RCUF Condensing Unit 3ph .................148

14 Part Number 000015433_05 3/21
Refrigeration Tubing Schematics.................150
UNF0200/UFF0350 Air-cooled...............150
RFF0320 Air-cooled........................151
RFF0620 Air and Water-cooled ..............152
RNF1100 Air and Water-cooled ..............153
RFF1300 Air and Water-cooled ..............154
RFF2500 Air-cooled........................156
Remote Condensing Unit Models................158
RFF1220C and RCUF1200 Condensing Unit ....158
RFF2200C QuietQube Head Section and RCUF2200
Condensing Unit ..........................160
RNF1020C QuietQube Head Section and RCUF1000
Condensing Unit ..........................162
RNF2000C QuietQube Head Section and RCUF2200
Condensing Unit ..........................164

Part Number 000015433_05 3/21 15
Model Numbers

Flake Models




Modular Air-

Modular

UFF0200A – – –
UFF0350A – – –
– – RFF0320A –
– – RFF0620A RFF0620W
– – RFF1300A RFF1300W
– – RFF2500A –





Modular

Modular

UNF0200A – – –
UNF0300A – – –
UNF0300A – – –
– – RNF0320A –
– – RNF0620A RNF0620W
– – RNF1100A RNF1100W


16 Part Number 000015433_05 3/21

UNIT
Flake Models
 
RFF1220C RCUF1200
RFF2200C RCUF2200

 
RNF1020C RCUF1000
RNF2000C RCUF2200

 
UFF0200 - RFF0320 2400
UNF0200 2800
UNF0300 - UFF0350 5000
RNF0320 3075
RFF0620 - RNF0620 5200
RNF1100 - RFF1300 7500
RFF2500 17000

Part Number 000015433_05 3/21 17

For warranty information visit: www.manitowocice.com/
Service/Warranty
• Warranty Coverage Information
• Warranty Registration
• Warranty Verification
Warranty coverage begins the day the ice machine is
installed.

Scan the QR code with your smart device or enter the link
in a web browser to access:
• Warranty registration
• Warranty information
• Warranty labor claim form



These numbers are required when requesting information
from your local Manitowoc Distributor, or Manitowoc Ice.
The model and serial number are listed on the MODEL/
SERIAL NUMBER DECAL affixed to the ice machine.

18 Part Number 000015433_05 3/21

Manitowoc Ice Machine Cleaner/Descaler and Sanitizer
are available in 16 oz. (473 ml) bottles. These are the only
cleaner and sanitizer approved for use with Manitowoc
products.
 
16 oz. 000000084 16 oz. 9405653
1 gal N/A 1 gal. 9405813

Part Number 000015433_05 3/21 19
Installation Requirements
The location selected for the ice machine must meet the
following criteria. If any of these criteria are not met,
select another location.
• Air temperature - Minimum 50°F (10°C), Maximum
110°F (43°C)
• The location must be free of airborne and other
contaminants.
• The location must not be near heat-generating
equipment or in direct sunlight.
• The location must be capable of supporting the weight
of the ice machine and a full bin of ice.
• The location must allow enough clearance for water,
drain and electrical connections in the rear of the ice
machine.
• The location must not obstruct airflow through or
around the ice machine.
• The ice machine and bin must be level.
• Routine adjustments and maintenance procedures
outlined in this manual are not covered by the
warranty.
Installation

20 Part Number 000015433_05 3/21
Potable Water Requirements
• Plumbing must conform to local codes.
• Water temperature: Minimum 37°F (3°C), Maximum
90°F (32°C).
• Do not connect the ice machine to a hot water supply.
Be sure all hot water restrictors installed for other
equipment are working. (Check valves on sink faucets,
dishwashers, etc.)
• If water pressure exceeds maximum pressure (80 psig
[552 kPa] obtain a water pressure regulator.
• A water shut-off valve is required to clean the ice
machine.
• A union for both the ice making and condenser water
lines is required.
• Water inlet lines require insulation to prevent
condensation.
• When local code requires, a back flow preventer must
be installed on the water inlet line.
Drain Connections
• Drain lines must have a 1.5 inch drop per 5 feet of run
(2.5 cm per meter), and must not create traps.
• The floor drain must be large enough to accommodate
drainage from all drains.
• Bin drain termination must have an air gap.
• Separate insulated bin and water-cooled condenser
drain lines are required.
• The bin and ice machine drains must be run separately.