Manitowoc CNF201A User manual

Part Number 000015432 4/18
Countertop Nugget
Ice Machines
CNF201 & CNF202
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.
• 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.
• 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.
• 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.

nWarning
Follow these precautions to prevent personal injury
while operating or maintaining this equipment.
• 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.
• Some 50 Hz 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.
• 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.
• 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.
.

Table of Contents
Part Number 000015432 4/18 9
General Information
Model Numbers............................... 13
Model/Serial Number Location ............... 13
Manitowoc Cleaner and Sanitizer............. 13
Legs........................................... 14
Touchless Sensing Option .................... 14
Ice Machine Warranty Information............ 14
Installation
Location of Ice Machine....................... 15
Ice Machine Clearance Requirements......... 16
Ice Machine Heat of Rejection ................ 16
Electrical Service.............................. 17
Circuit Ampacity .......................... 17
Ice Machine Head Section Water
SupplyandDrains ............................ 18
Potable Water Supply...................... 18
Potable Water Inlet Lines .................. 18
Drain Connections ........................ 19
Operation ..................................... 21
Ice Making Sequence of Operation ........... 21
CNF201 - CNF202 Nugget Machines........ 21
Touch Pad Sequence of Operation ......... 23
Water Level Check......................... 23
Sequence of Operation Chart ............. 24

10 Part Number 000015432 4/18
Maintenance
Manitowoc’s Cleaning Technology............ 26
Exterior Cleaning .......................... 27
Preventative Maintenance Procedure ........ 28
Heavily Scaled Cleaning Procedure ........... 31
Cleaning Procedure ........................... 33
Sanitizing Procedure.......................... 35
Component Disassembly for Cleaning and
Sanitizing ..................................... 37
General Information ....................... 37
Cleaning the Condenser ................... 51
Removal from Service/Winterization ......... 52
General ................................... 52
Troubleshooting
SafeGuard Feature ............................ 53
SafeGuards ................................... 55
No Water.................................. 55
No Ice Production ......................... 56
Ice Machine Will Not Run Diagnostics......... 58
Refrigeration Diagnostics..................... 64
Before Beginning Service . . . . . . . . . . . . . . . . . . 64
Installation/Visual Inspection Checklist..... 64
Water System Checklist .................... 65
Ice Production/Quality Check .............. 66
Analyzing Discharge Pressure.............. 67
Analyzing Suction Pressure ................ 69

Part Number 000015432 4/18 11
Component Check Procedures
Electrical Components ........................ 71
Main Fuse ................................. 71
ICE/OFF/CLEAN Toggle Switch ............. 72
Float Switch ............................... 73
Ice Damper and Hall Effect Switches ....... 74
Selector Switch............................ 77
Dispense Lever Activated .................. 77
Touchless Sensor Activated ................ 78
Dispense Switch........................... 80
Touchless Sensor .......................... 81
High Pressure Cutout Control .............. 82
Fan Cycle Control.......................... 83
Low Pressure Cutout (LPCO) Control ....... 84
Compressor Electrical Diagnostics ......... 85
Diagnosing Start Components ............. 87
Refrigerant Recovery/Evacuation............. 89
Normal Self-Contained Procedures......... 89
System Contamination Clean-Up ............. 93
Determining Severity of Contamination.... 93
Cleanup Procedure ........................ 95
Replacing Pressure Controls Without
Removing Refrigerant Charge.............. 98
Component Specifications
Main Fuse ................................101
ICE/OFF/CLEAN Toggle Switch ............101
High Pressure Cutout (HPCO) Control .....101
Filter-Driers ..............................101
Total System Refrigerant Charge.............102

12 Part Number 000015432 4/18
Charts
Cycle Times/24-Hour Ice Production/Refrigerant
Pressure Charts ..............................103
CNF201 ..................................104
CNF202 ..................................105
Diagrams
Wiring Diagrams .............................107
CNF201 & CNF202 115/60/1 - 230/60/1 -
230/50/1 .................................108
Electronic Control Board.....................110
CNF201 & CNF202 Control Board..........110
Refrigeration Tubing Schematic .............112
CNF201 - CNF202.........................112

Part Number 000015432 4/18 13
Model Numbers
Self-Contained Air-Cooled
CNF201A - Air-cooled lever dispense model
CNF201AT - Air-cooled touchless dispense model
CNF202A - Air-cooled lever dispense model
CNF202AT - Air-cooled touchless dispense model
Model/Serial Number Location
These numbers are required when requesting information
from your local Manitowoc Distributor, service
representative, or Manitowoc Ice, Inc. The model and
serial number are listed on the OWNER WARRANTY
REGISTRATION CARD. They are also listed on the MODEL/
SERIAL NUMBER DECAL affixed to the ice machine.
Manitowoc Cleaner and Sanitizer
Manitowoc Ice Machine Cleaner and Sanitizer are available
in 16 oz. (473 ml) bottles. These are the only cleaners and
sanitizer approved for use with Manitowoc products.
,Caution
Nugget models must use cleaner part number
000000084 ONLY (clear cleaner). Damage to the
evaporator will result with repeated use or high
concentrations of standard (green) cleaner. This
damage is not covered by the warranty.
Cleaner Part Number Sanitizer Part Number
16 oz. 000000084 16 oz. 9405653
1 gal N/A 1 gal. 9405813
General Information

14 Part Number 000015432 4/18
Legs
Optional four inch adjustable legs are available.
SEALING TO COUNTERTOP OR STAND
Ice machines installed without legs must be sealed to the
countertop or stand. This prevent liquids or debris from
infiltrating beneath the ice machine.
Touchless Sensing Option
Touchless sensing can be ordered installed on the ice
machine from the factory or a field conversion kit is
available. The field conversion kit includes a replacement
front panel and instructions for installation
Ice Machine Warranty Information
For warranty information visit:
http://www.manitowocice.com/Service/Warranty
• Warranty Verification
• Warranty Registration
• View and download a copy of the warranty Owner
Warranty Registration Card
Warranty coverage begins the day the ice machine is
installed.

Part Number 000015432 4/18 15
nWarning
PERSONAL INJURY POTENTIAL
Remove all ice machine panels before lifting and
installing.
Location of Ice Machine
The location selected for the ice machine must meet the
following criteria. If any of these criteria are not met,
select another location.
• The location must be indoors and free of airborne and
other contaminants..
• The air temperature must be at least 45°F (7°C), but
must not exceed 110°F (43°C).
• The water temperature must be at least 45°F (7°C), but
must not exceed 90°F (32°C).
• 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 and allow the
ice machine to be level front to back and side to side.
• The location must allow enough clearance for water
and electrical connections in the rear of the ice
machine. The drain can be routed out the rear or
bottom of dispenser.
• The location must not obstruct airflow through or
around the ice machine. Airflow is in the left side and
out the top. Refer to chart for clearance requirements.
• The ice machine must be protected if it will be
subjected to temperatures below 32°F (0°C). Failure
caused by exposure to freezing temperatures is not
covered by the warranty. See “Removal from Service/
Winterization”
Installation

16 Part Number 000015432 4/18
Ice Machine Clearance Requirements
CNF201 - CNF202 Self-Contained Air-Cooled
Top 24" (61.0 cm)
Sides 8" (20.3 cm)
Back 5" (12.7 cm)
Ice Machine Heat of Rejection
Series Ice Machine Heat of Rejection*
Air Conditioning
CNF201 - CNF202 2,300
* BTU/Hour. Because the heat of rejection varies during the ice
making cycle, the figure shown is an average.
Ice machines, like other refrigeration equipment, reject
heat through the condenser. It is helpful to know the
amount of heat rejected by the ice machine when sizing air
conditioning equipment where self-contained air-cooled
ice machines are installed.

Part Number 000015432 4/18 17
Electrical Service
General
nWarning
All wiring must conform to local, state and national
codes.
Voltage
The maximum allowable voltage variation is ± 10% of the
rated voltage on the ice machine model/serial number
plate at start-up (when the electrical load is highest).
Fuse/Circuit Breaker
A separate fuse/circuit breaker must be provided for each
ice machine. Circuit breakers must be H.A.C.R. rated (does
not apply in Canada).
nWarning
The ice machine must be grounded in accordance with
national and local electrical codes.
CIRCUIT AMPACITY
The minimum circuit ampacity is used to help select
the wire size of the electrical supply. (Minimum circuit
ampacity is not the ice machine’s running amp load.)
The wire size (or gauge) is also dependent upon location,
materials used, length of run, etc., so it must be
determined by a qualified electrician.
Self Contained Air-Cooled
Ice Machine Voltage Phase
Cycle
Max. Fuse/
Circuit Breaker Total Amps
CNF201
CNF202
115/1/60 15* 10.3*
230/1/50 15* 5.4*
*Indicates preliminary data - Model/Serial plate information
overrides the data in this chart.

18 Part Number 000015432 4/18
Ice Machine Head Section Water
Supply and Drains
POTABLE WATER SUPPLY
The ice machine must be connected to a potable water
supply only. Local water conditions may require treatment
of the water to inhibit scale formation, filter sediment,
remove chlorine, and improve taste and clarity.
Important
If you are installing a Manitowoc water filter system,
refer to the Installation Instructions supplied with the
filter system for ice making water inlet connections.
POTABLE WATER INLET LINES
Follow these guidelines to install water inlet lines:
• 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 the maximum recommended
pressure of 80 psig (5.5 Bar), obtain a water pressure
regulator from your Manitowoc Distributor.
• Install a water shut-off valve and union for both the ice
making and condenser water lines.
• Insulate water inlet lines to prevent condensation.

Part Number 000015432 4/18 19
DRAIN CONNECTIONS
Follow these guidelines when installing drain lines to
prevent drain water from flowing back into the ice
machine and storage bin:
• Drain lines must have a 1.5 in. drop per 5 ft. 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.
• Run separate bin drain line. Insulate to prevent
condensation.
• Vent the bin drain to the atmosphere.
• Drains must have a union or other suitable means to
allow a place of disconnection from the ice machine
when servicing is required.

20 Part Number 000015432 4/18
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