Welbilt Manitowoc UFK Series User manual

Part Number 000016034 Rev 00 07/19
Flake and Nugget Model
Ice Machines UFK, UNK, RFK, RNK
Installation, Operation and Maintenance Manual
Original Document Caution
Read this instruction before operating this equipment

Safety Notices
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.
Definitions
DANGER
Indicates a hazardous situation that, if not avoided, will
result in death or serious injury. This applies to the most
extreme situations.
nWarning
Indicates a hazardous situation that, if not avoided, could
result in death or serious injury.
,Caution
Indicates a hazardous situation that, if not avoided, could
result in minor or moderate injury.
Notice
Indicates information considered important,but not hazard-
related (e.g. messages relating to property damage).
NOTE: Indicates useful, extra information about the
procedure you are performing.

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.
• Ice machines require a deflector when installed on an ice
storage bin. Prior to using a non-OEM ice storage system
with this ice machine, contact the bin manufacturer to
assure their ice deflector is compatible.
• Prior to installing a non-OEM ice storage system with
this ice machine, follow the manufacturers installation
procedures and verify the location and installation
meets the local/national mechanical codes and stability
requirements.
• 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.
• Legs or casters must be installed and the legs/casters
must be screwed in completely. When casters are
installed the mass of this unit will allow it to move
uncontrolled on an inclined surface. These units must be
tethered/secured to comply with all applicable codes.
Swivel casters must be mounted on the front and rigid
casters must be mounted on the rear. Lock the front
casters after installation is complete.
• Connect to a potable water supply only.
• Do not damage the refrigeration circuit when installing,
maintaining or servicing the unit.
• This equipment contains refrigerant charge. Installation
of the line sets must be performed by a properly trained
and EPA certified refrigeration technician aware of the
dangers of dealing with refrigerant charged equipment.

DANGER
Follow these flammable refrigeration system requirements during installation, use or repair of this equipment.
• Refer to nameplate - Ice machine models may contain
up to 150 grams of R290 (propane) refrigerant. R290
(propane) is flammable in concentrations of air between
approximately 2.1% and 9.5% by volume (LEL lower
explosion limit and UEL upper explosion limit). An ignition
source at a temperature higher than 470°C is needed for
a combustion to occur. Refer to nameplate to identify the
type of refrigerant in your equipment.
• To minimize the risk of ignition due to improper
installation, replacement parts or service procedures,
only refrigeration technicians with flammable refrigerant
training who are aware of the dangers of dealing with
high voltage electricity and refrigerant under pressure are
allowed to work on this equipment.
• All replacement parts must be like components
obtained from the equipment manufacturers authorized
replacement part network.
• This equipment must be installed in accordance with the
ASHRAE 15 Safety Standard for Refrigeration Systems.
• This equipment can not be installed in corridors or
hallways of public buildings
• Installation must comply with all applicable equipment
fire and health codes with the authority having
jurisdiction.
• All lockout and tag out procedures must be followed
when working on this equipment.
• This equipment contains high voltage electricity
and refrigerant charge. Shorting electrical wires to
refrigeration tubing may result in an explosion. All
electrical power must be disconnected from the system
before servicing the system. Refrigerant leaks, can result
in serious injury or death from explosion, fire, or contact
with refrigerant or lubricant mists.
• Do not damage the refrigeration circuit when installing,
maintaining or servicing the unit. Never use sharp objects
or tools to remove ice or frost. Do not use mechanical
devices or other means to accelerate the defrosting
process.

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.
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 while
operating or maintaining this 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.
• 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.
nWarning
These products are hermetically sealed and may contain
fluorinated greenhouse gas R404A. Refer to model/serial
label.

DANGER
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.
• Units with two power cords must be plugged into
individual branch circuits. During movement, cleaning or
repair it is necessary to unplug both power cords.
• Never use a high-pressure water jet for cleaning on the
interior or exterior of this unit. Do not use power cleaning
equipment, steel wool, scrapers or wire brushes on
stainless steel or painted surfaces.
• Two or more people are required to move this equipment
to prevent tipping.
• Locking the front casters after moving is the owner’s and
operator’s responsibility. When casters are installed, the
mass of this unit will allow it to move uncontrolled on an
inclined surface. These units must be tethered/secured to
comply with all applicable codes.
• The on-site supervisor is responsible for ensuring that
operators are made aware of the inherent dangers of
operating this equipment.
• Do not operate any appliance with a damaged cord or
plug. All repairs must be performed by a qualified service
company.

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Table of Contents
Part Number 000016034 Rev 00 07/19 9
Safety Notices
Safety Notices ................................................................................................................... 3
Section 1
General Information
Model Numbers .............................................................................................................. 11
Flake Undercounter Models..........................................................................................11
RFK2500 Bin Adapter Installation..................................................................................12
Warranty Information...................................................................................................... 12
Warranty Registration ...................................................................................................12
Arctic Pure Water Filter System ....................................................................................... 12
Manitowoc Cleaner and Sanitizer .................................................................................... 12
Section 2
Installation Instructions
Location of Ice Machine................................................................................................... 13
Clearance Requirements ............................................................................................... 13
Installation Requirements ............................................................................................... 13
Ice Machine Heat of Rejection......................................................................................... 13
Water and Drain Requirements ....................................................................................... 14
Potable Water Requirements........................................................................................14
Drain Connections.........................................................................................................14
Cooling Tower Applications...........................................................................................14
Ice Machine Water Usage .............................................................................................14
Water Supply and Drain Line Sizing/Connections .........................................................15
Electrical Service ............................................................................................................. 16
Voltage .......................................................................................................................... 16
Fuse/Circuit Breaker...................................................................................................... 16
Ground Fault Circuit Interrupter ...................................................................................16
Minimum Power Cord Specifications ............................................................................16
For United Kingdom Only..............................................................................................16
Maximum Breaker Size & Minimum Circuit Amperage Chart ........................................... 17
QuietQube Remote Condensing Unit............................................................................17
Refrigeration System Installation
Remote Condensing Unit................................................................................................. 18
Rack Unit Connection Size............................................................................................. 18
Refrigerant Charge Data................................................................................................18
Usage with Non-Manitowoc Condensing Units ............................................................18
Refrigeration Line Set Installation
Remote Condensing Unit Only......................................................................................... 19
A. Line Set Length.......................................................................................................... 19
B. Line Set Rise or Drop.................................................................................................19
C. Suction Line Oil Traps ................................................................................................ 20
Installation Check List...................................................................................................... 22
Additional Checks for QuietQube Models ........................................................................ 22

10 Part Number 000016034 Rev 00 07/19
Table of Contents (continued)
Section 3
Operation
Bin Thermostat and Evaporator Low Temperature Safety Adjustment Chart .................... 23
Thermostat Adjustment for Altitude................................................................................ 23
Altitude Adjustment Chart ............................................................................................23
UF0244/UF0200/UF0350/UF0388/UF0399 & UN0200/UN0300 Operation ...................... 24
RF0320 & RN0320 Operation ........................................................................................... 24
RN0620/RF0620/RN1100/RF1300/RF2500 & RF1220/RF2200 Operation ......................... 24
Section 4
Maintenance
Interior Cleaning and Sanitizing ....................................................................................... 25
Cleaning/Sanitizing Procedure ......................................................................................25
Heavily Scaled Cleaning Procedure ...............................................................................25
Exterior Cleaning ............................................................................................................. 25
Cleaning/Sanitizing Procedure......................................................................................... 25
Procedure to Clean Heavily Scaled Flake Ice Machines..................................................... 26
Removal of Parts for Cleaning/Sanitizing ......................................................................... 27
Ice Chute Removal.........................................................................................................27
Air-Cooled Condenser Cleaning ....................................................................................... 28
Removal from Service/Winterization............................................................................... 28
Water-Cooled Ice Machines ..........................................................................................28
Section 5
Troubleshooting
Checklist.......................................................................................................................... 29