Installation, Use & Care Manual
This manual is updated as new information and models are released.
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America’s #1 Selling Ice Machine
U65
UnderCounter Model
Ice Machines
Part Number 040006019 08/22
Part Number 040006019 08/22
Safety Notices
Safety Notices
DEFINITIONS
NOTE: Indicates useful, extra information about the
procedure you are performing.
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.
Indicates a hazardous situation that, if not avoided, will
result in death or serious injury. This applies to the most
extreme situations.
!
Warning
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 of moderate injury.
!
DANGER
Notice
Indicates information considered important, but not
hazard-related (e.g. messages relating to property
damage).
!
Warning
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.
!
Warning
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.
• Connect to a potable water supply only.
• Do not damage the refrigeration circuit when
installing, maintaining or servicing the unit.
Part Number 040006019 08/22
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.
!
Warning
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 collectiong 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.
!
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 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 (electric, water)
according to approved practices during maintenance
or servicing.
• 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.
• 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.
!
DANGER
Part Number 040006019 08/22 i
Table of Contents
Section 1
General Information
Model/Serial Number Location................................................................... 1-1
Owner Warranty Registration Card .......................................................... 1-2
Section 2
Installation Instructions
General................................................................................................................. 2-1
Dimensions ........................................................................................................ 2-1
Location of Ice Machine................................................................................ 2-2
Ice Machine Heat of Rejection.................................................................... 2-2
Leveling the Ice Machine.............................................................................. 2-2
Electrical Service............................................................................................. 2-3
VOLTAGE ………………………………………………………………………… 2-3
FUSE/CIRCUIT BREAKER …………………………………………………… 2-3
ELECTRICAL RATING ………………………………………………………… 2-3
ELECTRICAL CORD STRAIN RELIEF ……………………………………… 2-4
TERMINAL BLOCK WIRE CONNECTION…………………………………… 2-4
Water Service/Drains...................................................................................... 2-5
WATER SUPPLY………………………………………………………………… 2-5
DRAIN CONNECTIONS ………………………………………………………… 2-5
WATER SUPPLY AND DRAIN LINE SIZING/CONNECTIONS …………… 2-5
Section 3
Operation
Sequence of Operation ................................................................... 3-1
INITIAL START-UP OR START-UP AFTER AUTOMATIC SHUT-OFF …… 3-1
Ice Thickness Adjustment ........................................................................... 3-2
Table of Contents (continued)
ii Part Number 040006019 08/22
Section 4
Maintenance
Interior De-scaling and Sanitizing ............................................................ 4-1
GENERAL ……………………………………………………………………… 4-1
DE-SCALING AND SANITIZING PROCEDURE …………………………… 4-1
Exterior Cleaning............................................................................. 4-3
Ice Machine Inspection ................................................................... 4-3
Cleaning The Condenser ................................................................ 4-4
Removal from Service/Winterization....................................................... 4-4
Section 5
Before Calling for Service
Checklist ............................................................................................................. 5-1
Part Number 040006019 08/22 1-1
Section 1
General Information
Model/Serial Number Location
Record the model and serial number of your ice machine
in the space provided below. These numbers are
required when requesting information from your
distributor, service representative, or the factory.
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.
Model/Serial Number Location
Model Number:_____________________ Serial Number:______________________
MODEL AND
SERIAL NUMBER
MODEL AND
SERIAL
NUMBER
General Information Section 1
1-2 Part Number 040006019 08/22
Owner Warranty Registration Card
GENERAL
The packet containing this manual also includes
warranty information. Warranty coverage begins the day
your new ice machine is installed.
If you do not return your OWNER WARRANTY
REGISTRATION CARD, Manitowoc will use the date of
sale to the Manitowoc Distributor as the first day of
warranty coverage for your new ice machine.
COMMERCIAL WARRANTY COVERAGE
General
The following Warranty outline is provided for your
convenience. For a detailed explanation, read the
warranty bond shipped with each product.
Contact your local Manitowoc representative or
Manitowoc if you need further warranty information.
Parts
Manitowoc warrants the ice machine against defects in
materials and workmanship, under normal use and
service for three (3) years from the date of original
installation.
Labor
Labor required to repair or replace defective
components is covered for there (3) years from the date
of original installation.
Exclusions
The following items are not included in the ice machine’s
warranty coverage:
1. Normal maintenance, adjustments and cleaning as
outlined in this manual.
2. Repairs due to unauthorized modifications to the ice
machine or use of non-standard parts without prior
written approval from Manitowoc.
3. Damage caused by improper installation of the ice
machine, electrical supply, water supply or drainage,
or damage caused by floods, storms, or other acts of
God.
4. Premium labor rates due to holidays, overtime, etc.;
travel time; flat rate service call charges; mileage
and miscellaneous tools and material charges not
listed on the payment schedule. Additional labor
charges resulting from the inaccessibility of
equipment are also excluded.
5. Parts or assemblies subjected to misuse, abuse,
neglect or accidents.
6. Damage or problems caused by installation,
cleaning and/or maintenance procedures
inconsistent with the technical instructions provided
in this manual.
AUTHORIZED WARRANTY SERVICE
To comply with the provisions of the warranty, a
refrigeration service company, qualified and authorized
by your Manitowoc distributor, or a Contracted Service
Representative must perform the warranty repair.
NOTE: If the dealer you purchased the ice machine from
is not authorized to perform warranty service, contact
your Manitowoc distributor or Manitowoc for the name of
the nearest authorized service representative.
SERVICE CALLS
Normal maintenance, adjustments and cleaning as
outlined in this manual are not covered by the warranty.
If you have followed the procedures listed in this manual,
and the ice machine still does not perform properly, call
your authorized service company.
Important
Complete and mail the OWNER WARRANTY
REGISTRATION CARD as soon as possible to
validate the installation date.
Section 1 General Information
Part Number 040006019 08/22 1-3
RESIDENTIAL WARRANTY COVERAGE
WHAT DOES THIS LIMITED WARRANTY COVER?
Subject to the exclusions and limitations below,
Manitowoc warrants to the original consumer that any
new ice machine manufactured by Manitowoc (the
“Product”) shall be free of defects in material or
workmanship for the warranty period outlined below
under normal use and maintenance, and upon proper
installation and start-up in accordance with the
instruction manual supplied with the Product.
HOW LONG DOES THIS LIMITED WARRANTY
LAST?
Ice Machine - Twelve (12) months from the sale date.
WHO IS COVERED BY THIS LIMITED WARRANTY?
This limited warranty only applies to the original
consumer of the Product and is not transferable.
WHAT ARE MANITOWOC’S OBLIGATIONS UNDER
THIS LIMITED WARRANTY?
If a defect arises and Manitowoc receives a valid
warranty claim prior to the expiration of the warranty
period, Manitowoc shall, at its option: (1) repair the
Product at Manitowoc’s cost, including standard straight
time labor charges, (2) replace the Product with one that
is new or at least as functionally equivalent as the
original, or (3) refund the purchase price for the Product.
Replacement parts are warranted for 90 days or the
balance of the original warranty period, whichever is
longer. The foregoing constitutes Manitowoc’s sole
obligation and the consumer’s exclusive remedy for any
breach of this limited warranty. Manitowoc’s liability
under this limited warranty is limited to the purchase
price of Product. Additional expenses including, without
limitation, service travel time, overtime or premium labor
charges, accessing or removing the Product, or shipping
are the responsibility of the consumer.
HOW TO OBTAIN WARRANTY SERVICE
To obtain warranty service or information regarding your
Product, please contact us at:
MANITOWOC ICE
2110 So. 26
th
St.,
P.O. Box 1720,
Manitowoc, WI 54220-1720
Telephone: 800-545-5720 Fax: 920-683-7585
www.MANITOWOCICE.com
WHAT IS NOT COVERED?
This limited warranty does not cover, and you are solely
responsible for the costs of: (1) periodic or routine
maintenance, (2) repair or replacement of the Product or
parts due to normal wear and tear, (3) defects or
damage to the Product or parts resulting from misuse,
abuse, neglect, or accidents, (4) defects or damage to
the Product or parts resulting from improper or
unauthorized alterations, modifications, or changes; and
(5) defects or damage to any Product that has not been
installed and/or maintained in accordance with the
instruction manual or technical instructions provided by
Manitowoc. To the extent that warranty exclusions are
not permitted under some state laws, these exclusions
may not apply to you.
except AS STATED IN THE following SENTENCE, THIS
LIMITED WARRANTY IS THE SOLE AND EXCLUSIVE
WARRANTY OF Manitowoc WITH REGARD TO THE
PRODUCT. ALL implied warrantIES ARE STRICTLY
limited to the duration of THE limited warranty applicable
to the products as STATED ABOVE, INCLUDING BUT
NOT LIMITED TO, ANY WARRANTY OF
MERCHANTABILITY OR OF FITNESS FOR A
PARTICULAR PURPOSE. Some states do not allow
limitations on how long an implied warranty lasts, so the
above limitation may not apply to you.
IN NO EVENT SHALL Manitowoc or any of its affiliates
BE LIABLE TO THE CONSUMER OR ANY OTHER
person FOR ANY INCIDENTAL, CONSEQUENTIAL OR
SPECIAL DAMAGES of any kind (including, without
limitation, loss OF profits, revenue or business)
ARISING FROM OR IN ANY MANNER CONNECTED
WITH THE PRODUCT, ANY BREACH OF THIS
LIMITED WARRANTY, OR ANY OTHER CAUSE
WHATSOEVER, WHETHER BASED ON CONTRACT,
TORT OR ANY OTHER THEORY OF LIABILITY. Some
states do not allow the exclusion or limitation of
incidental or consequential damages, so the above
limitation or exclusion may not apply to you.
HOW STATE LAW APPLIES
This limited warranty gives you specific legal rights, and
you may also have rights that vary from state to state or
from one jurisdiction to another.
REGISTRATION CARD
To secure prompt and continuing warranty service, this
warranty registration card must be completed and sent
to Manitowoc within thirty (30) days from the sale date.
Complete the following registration card and send it to
Manitowoc at the address shown.
Installation Instructions Section 2
2-2 Part Number 040006019 08/22
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.
• The location must be free of airborne and other
contaminants.
• The air temperature must be at least 10C (50F), but
must not exceed 40C (110F).
• 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 (condenser airflow is in and
out the front). Refer to the chart below for clearance
requirements.
NOTE: The ice machine may be built into a cabinet.
There is no minimum clearance requirement for the top
or left and right sides of the ice machine. The listed
values are recommended for efficient operation and
servicing only.
Ice Machine Heat of Rejection
*B.T.U./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.
Leveling the Ice Machine
After moving the ice machine into the installation
location, it must be leveled for proper operation. Follow
these steps to level the ice machine:
1. Check the level of the ice machine from front to back
and from side to side.
Checking for Level
2. If the ice machine is not level, adjust the leveling
glides on each corner of the base of the ice machine
as necessary.
Leveling Glide
3. Check the level of the ice machine after each
adjustment of the leveling glides.
4. Repeat steps 2 and 3 until the ice machine is level
from front to back and from side to side.
Self-Contained Air-Cooled
Top/Sides 5” (127 mm)*
Back 5” (127 mm)*
!
Caution
The ice machine must be protected if it will be
subjected to temperatures below 32F (0C).
Failure caused by exposure to freezing
temperatures is not covered by the warranty. See
“Removal from Service/Winterization” Section 4.
Series
Ice Machine
Heat of Rejection*
Air Conditioning** Peak
UDE0065A 1600 2350
Section 2 Installation Instructions
Part Number 040006019 08/22 2-3
Electrical Service
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.
NOTE: A disconnect means must be provided for field
wiring.
ELECTRICAL RATING
The electrical rating is used to help select the wire size
of the electrical supply. The wire size (or gauge) also
depends on location, materials used, length of run, etc.,
so it must be determined by a qualified electrician.
!
Warning
All wiring must conform to local, state and national
codes.
Voltage Phase Electrical Rating
230/50/1 0.6kW
230/60/1 0.6kW
115/60/1 0.6kW
!
Warning
The ice machine must be grounded in accordance
with national and local electrical codes.
!
Warning
Never use an extension cord. If an outlet is not
within reach of the ice machine’s power cord, have
a proper amperage outlet wired closer to the ice
machine.
Installation Instructions Section 2
2-4 Part Number 040006019 08/22
ELECTRICAL CORD STRAIN RELIEF
To prevent strain at the electrical connection inside the
ice machine, an electrical cord strain relief device must
be installed on the rear panel of the ice machine.
1. Disassemble the strain relief device into its three
components.
2. Install the cord holder through the opening in the
lower right corner of the rear panel of the ice
machine.
Strain Relief Installation
3. Hand-tighten the retaining nut onto the cord holder
from inside the ice machine rear panel.
4. Slide the compression nut over the electrical cord.
5. Feed about 1.5 m (5 ft.) of electrical cord through the
cord holder. (The extra cord will allow the rear panel
to be removed for future service.)
6. Hand-tighten the compression nut onto the cord
holder.
TERMINAL BLOCK WIRE CONNECTION
After the electrical cord is installed in the strain relief
device, the cord must be connected to the terminal block
to supply power to the ice machine.
1. Remove two Phillips head screws to remove the
lower panel from the front of the ice machine.
2. Carefully reach into the ice machine and pull the
electrical cord forward to the terminal block.
3. Strip away enough insulation from the electrical cord
to allow for good electrical connections at the
terminal block.
Terminal Block Connections
4. Open the screw terminals on the terminal block.
5. Connect each wire in the electrical cord to the
appropriate screw terminal.
6. Carefully tighten the screws over the wire.
7. Tug lightly on each wire to be sure the connections
are secure.
RETAINING NUT
(BEHIND THE
PANEL)
CORD
HOLDER
ELECTRICAL
CORD
COMPRESSION
NUT
!
Warning
Always disconnect power to the ice machine before
working on electrical circuitry.
TERMINAL
BLOCK
L1
N
GND
ELECTRICAL
CORD
Section 2 Installation Instructions
Part Number 040006019 08/22 2-5
Water Service/Drains
WATER SUPPLY
Local water conditions may require treatment of the
water to inhibit scale formation, filter sediment, remove
chlorine, and improve taste and clarity.
Follow these guidelines to install water inlet lines:
• Connect to potable water supply only.
• 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, obtain a water pressure
regulator from your Manitowoc distributor.
• Install a water shut-off valve for both the ice making
and condenser water lines (if applicable).
•
Insulate water lines to prevent condensation.
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 2.5 cm (1 inch) drop per 1
meter (40 inches) of run, and must not create traps.
• The floor drain must be large enough to
accommodate drainage from all drains.
• Insulate the bin drain line to prevent condensation.
WATER SUPPLY AND DRAIN LINE SIZING/CONNECTIONS
1
Min. = Minimum
2
Max. = Maximum
3
A 3/4” by 11-1/2 threads per inch to 14 threads per inch adapter is factory installed. Remove this adapter if 11-1/2
threads per inch connection is desired.
Installation Note
(Switzerland) The connection to the drinking water network must be made with a certified backflow
preventer type EA(EN13959) and with a certified connection hose (EN13618 or EN61770) on site.
Important
If you are installing a Manitowoc Tri-Liminator
water filter system, refer to the Installation
Instructions supplied with the filter system for ice
making water inlet connections.
Important
The water inlet line is connected to the water
valve. This valve is located just behind the front
panel of the ice machine.
!
Caution
Plumbing must conform to state and local codes.
Water
Temperature
Water
Pressure
Ice Machine
Fitting
Tubing Size Up to Ice
Machine Fitting
Ice Making
Water Inlet
10C (50F)
Min.
1
30C (86F)Max.
2
240 kPA (34.8 psi)Min.
1
620 kPA (89.9 psi)Max.
2
3/4” male hose
connection
3
0.95 cm (3/8”) minimum
inside diameter
Ice Making/
Bin Water
Drain
—— ——
1.59 cm (5/8”)
inside
diameter flexible
hose
1.59 cm (5/8”) minimum
inside diameter
Part Number 040006019 08/22 3-1
Section 3
Operation
Sequence of Operation
*Initial Start-Up or Start-Up After Automatic Shut-Off
INITIAL START-UP OR START-UP AFTER AUTOMATIC SHUT-OFF
1. Water Purge
The water fill valve and the hot gas valve are energized
for 2.9 minutes (175 seconds). This ensures that the ice
making cycle starts with fresh water, and that the
refrigerant pressures are equalized prior to refrigeration
system start-up.
2. Refrigeration System Start-Up
The compressor starts 2.9 minutes (175 seconds) after
the water fill valve and hot gas valve are energized. (The
water fill valve and hot gas valve remain energized for 5
seconds during compressor start-up, and then shut off.)
The compressor remains on throughout the entire freeze
and harvest cycles.
3. freeze cycle
The condenser fan motor and water pump are energized
and remain on throughout the entire freeze cycle. An
even flow of water is directed across the evaporator and
into each cube cell, where it freezes.
The control system automatically determines the length
of the freeze cycle by monitoring the temperature of the
refrigeration system liquid line.
4. harvest cycle
The condenser fan motor and water pump de-energize.
The water fill valve energizes to purge the water in the
water trough. The hot gas valve also energizes at the
beginning of the harvest cycle to divert hot refrigerant
gas into the evaporator. The hot refrigerant gas warms
the evaporator, causing the cubes to slide, as a sheet,
off the evaporator and into the ice storage bin.
The control system automatically determines the length
of the harvest cycle, based on the temperature of the
refrigeration system liquid line at the end of the freeze
cycle. At the end of the harvest cycle, the ice machine
returns to another freeze cycle.
5. automatic shut-off
The ice machine shut-off is controlled by the level of ice
in the ice storage bin. When the bin is full, ice cubes
contact the bin thermostat bulb holder, which cools down
and opens to stop the ice machine. The ice machine
remains off until enough ice has been removed from the
bin. This causes the thermostat bulb holder to warm and
close, restarting the ice machine. When the ice machine
restarts, it returns to the start-up sequence.
Ice Making Sequence
of Operation
Control Board Relays
1
Compressor
2
Hot Gas Valve
Water Fill Valve
3
Water Pump
Fan Motor
Length of
“ON” Time
Start-Up*
1.Water Purge
2.Refrigeration
System Start-Up
off on on
2.9 Minutes
(175 Seconds)
on on off 5 Seconds
3.Freeze Cycle
on off on
Automatically deter-
mined
4.Harvest Cycle
on on off
Automatically deter-
mined
5.Auto Shut-Off
off off off
Until bin thermostat
re-closes
Operation Section 3
3-2 Part Number 040006019 08/22
Ice Thickness Adjustment
U65 dice ice cube formation is slightly different from our
previous models. Manitowoc ice machines have a
unique cube shape. It is normal to have a dimple in the
ice cube (a concave indentation in the cube). Ice cubes
from the U65 may appear to have a slightly larger dimple
than other Manitowoc dice cube machines. Therefore,
cube size for the U65 is determined by measuring the
slab weight (the combined weight of all cubes from one
harvest cycle). To determine proper slab weight follow
the instructions listed below.
Correct Ice Bridge Thickness
1. Ensure the air filter, front, and back panels are
installed properly and close the bin door.
2. During the third harvest cycle open the bin door and
catch the entire slab of ice.
3. Weigh the ice slab. The combined weight of all
cubes from one harvest should weigh between 200 -
270g (7 - 9-oz). If the slab weight is within this
range, the ice machine is working properly and no
further action is needed. If the slab weight is not
within this range or you desire a slightly thicker or
thinner cube, continue to step four.
4. Remove the air filter.
5. Remove the two screws holding the front panel in
place and remove the front cover.
6. Locate the ice thickness control dial on the control
board (see below). Turn the dial clockwise for a
thicker cube or counter clockwise for a thinner cube.
Ice Thickness Adjustment Dial
7. Assure all of the panels and air filter are reinstalled
properly and the bin door is closed. Repeat steps
one through three.
After completing the procedure above, if you are unable
to obtain a sheet of ice weighing 200 - 270g
(7 - 9-oz) contact the Manitowoc Service Department for
further assistance.
!
Warning
Do not touch electrical wires. Disconnect power to
the ice machine before making any ice thickness
adjustments.
ICE BRIDGE SHOULD BE 1.5
MM TO 3.2 MM THICKNESS
A DIMPLE IN
EACH CUBE
CELL IS
NORMAL
ICE THICKNESS
ADJUSTMENT
DIAL
DIAL IS
FACTORY SET
TO ZERO
Part Number 040006019 08/22 4-1
Section 4
Maintenance
Interior De-scaling and Sanitizing
GENERAL
De-scale and sanitize the ice machine every six months
for efficient operation. If the ice machine requires more
frequent de-scaling, consult a qualified service company
to test the water quality and recommend appropriate
water treatment. Sanitizing can be performed
independently and more frequently than de-scaling if
desired.
The ice machine must be taken apart for de-scaling and
sanitizing.
DE-SCALING AND SANITIZING PROCEDURE
Ice machine De-scaler is used to remove lime scale and
mineral deposits. Ice machine sanitizer disinfects and
removes algae and slime.
step 1 Set the toggle switch to the OFF position after
ice falls from the evaporator at the end of a Harvest
cycle. Or, set the switch to the OFF position and allow
the ice to melt off the evaporator.
step 2 Remove all ice from the bin.
step 3 To start a cleaning cycle, move the toggle switch
to the WASH position.
step 4 Wait until water flows over the evaporator (about
three minutes) then add the proper amount of
Manitowoc Ice Machine De-scaler to the water trough.
step 5 Wait until the clean cycle is complete
(approximately 45 minutes) then place the toggle switch
in the OFF position, disconnect power and water
supplies to the ice machine.
step 6 Remove parts for De-scaling.
A. Remove the Overflow Tube
• To remove the tube, lift it up while using a
slight back and forth motion to loosen it from
the drain hole.
When installing the tube, be sure it is completely
inserted into the drain hole to prevent water leakage
during normal operation.
Removing the Overflow Tube
!
Caution
Use only Manitowoc approved Ice Machine De-
scaler (part number 94-0546-3) and Sanitizer (part
number 94-0565-3). It is a violation of Federal law
to use these solutions in a manner inconsistent with
their labeling. Read and understand all labels
printed on bottles before use.
!
Caution
Do not mix Ice Machine De-scaler and Sanitizer
solutions together. It is a violation of Federal law to
use these solutions in a manner inconsistent with
their labeling.
!
Warning
Wear rubber gloves and safety goggles (and/or face
shield) when handling Ice Machine De-scaler or
Sanitizer.
!
Caution
Never use anything to force ice from the evaporator.
Damage may result.
Model Amount of De-scaler
U65 45 ml
!
Warning
Disconnect electric power to the ice machine at the
electric switch box before proceeding.
DRAIN
HOLE
OVERFLOW
TUBE
Maintenance Section 4
4-2 Part Number 040006019 08/22
B. Remove the Vinyl Hose
• Disconnect the water pump discharge hose
from the distribution tube and water pump.
C. Remove the Water Pump
• Disconnect the water pump power cord.
• Loosen the screws that hold the water pump
in place.
• Lift the water pump and bracket assembly up
and off the screws.
Removing the Water Pump
D. Remove the Water Trough
• Remove the screws holding the water trough
to the walls of the cabinet.
step 7 Mix a solution of de-scaler and warm water.
Depending on the amount of mineral buildup, a larger
quantity of solution may be required. Use the ratio in the
table below to mix enough solution to thoroughly clean
all parts.
step 8 Use ½ of the De-scaler/water solution to clean all
components. The de-scaler solution will foam when it
contacts lime scale and mineral deposits; once the
foaming stops use a soft bristle brush, sponge or cloth
(not a wire brush) to carefully clean the parts. Soak the
parts for 5 minutes (15 – 20 minutes for heavily scaled
parts). Rinse all components with clean water.
step 9 While components are soaking, use ½ of the de-
scaler/water solution to clean all foodzone surfaces of
the ice machine and bin. Use a nylon brush or cloth to
thoroughly clean the following ice machine areas:
• Evaporator plastic parts – including top,
bottom and sides
• Bin bottom, sides and top
Rinse all areas thoroughly with clean water.
step 10 Mix a solution of sanitizer and warm water.
step 11 Use 1/2 of the sanitizer/water solution to
sanitize all removed components. Use a cloth or sponge
to liberally apply the solution to all surfaces of the
removed parts or soak the removed parts in the
sanitizer/water solution. Do not rinse parts after
sanitizing.
step 12 Use 1/2 of the sanitizer/water solution to
sanitize all foodzone surfaces of the ice machine and
bin. Use a cloth or sponge to liberally apply the solution.
When sanitizing, pay particular attention to the following
areas:
• Evaporator plastic parts - including top,
bottom and sides
• Bin bottom, sides and top
Do not rinse the sanitized areas.
step 13 Replace all removed components.
step 14 Reapply power and water to the ice machine
and place the toggle switch in the WASH position.
step 15 Add the proper amount of Manitowoc Ice
Machine Sanitizer to the water trough.
step 16 Wait until the sanitize cycle is complete
(approximately 45 minutes) then place the toggle switch
in the OFF position, disconnect power and water
supplies to the ice machine.
step 17 Repeat step 6 to remove parts for hand
sanitizing.
Solution Type Water Mixed with
De-scaler 4L. (1 gall)
500 ml (16 oz)
De-scaler
WATER
PUMP
SCREWS
Solution Type Water Mixed With
Sanitizer 23 L. (6 gal )
120 ml (4 ounces)
sanitizer
Model Amount of Sanitizer
U65 45 ml
!
Warning
Disconnect electric power to the ice machine at the
electric switch box before proceeding.
Section 4 Maintenance
Part Number 040006019 08/22 4-3
step 18 Mix a solution of sanitizer and warm water.
step 19 Use 1/2 of the sanitizer/water solution to
sanitize all removed components. Use a cloth or sponge
to liberally apply the solution to all surfaces of the
removed parts or soak the removed parts in the
sanitizer/water solution. Do not rinse parts after
sanitizing.
step 20 Use 1/2 of the sanitizer/water solution to
sanitize all foodzone surfaces of the ice machine and
bin. Use a cloth or sponge to liberally apply the solution.
When sanitizing, pay particular attention to the following
areas:
• Evaporator plastic parts - including top,
bottom and sides
• Bin bottom, sides and top
Do not rinse the sanitized areas.
step 21 Replace all removed components.
step 22 Reapply power and water to the ice machine
and place the toggle switch in the ICE position.
Exterior Cleaning
Clean the area around the ice machine as often as
necessary to maintain cleanliness and efficient
operation.
Sponge any dust and dirt off the outside of the ice
machine with mild soap and water. Wipe dry with a
clean, soft cloth.
Treat all exterior stainless steel surfaces with a
commercial grade stainless steel cleaner/polish.
Ice Machine Inspection
Check all water fittings and lines for leaks. Also, make
sure the refrigeration tubing is not rubbing or vibrating
against other tubing, panels, etc.
Do not put anything (boxes, etc.) in front of the ice
machine. There must be adequate airflow through and
around the ice machine to maximize ice production and
ensure long component life.
Solution Type Water Mixed With
Sanitizer 23L. (6 gal )
120 ml (4 oz) san-
itizer
Maintenance Section 4
4-4 Part Number 040006019 08/22
Cleaning The Condenser
A dirty condenser restricts airflow, resulting in
excessively high operating temperatures. This reduces
ice production and shortens component life. Clean the
condenser at least every six months. Follow the steps
below.
1. The washable aluminum filter on self-contained ice
machines is designed to catch dust, dirt, lint and
grease. This helps keep the condenser clean. Clean
the filter with a mild soap and water solution.
Removing the Filter
2. Clean the outside of the condenser with a soft brush
or a vacuum with a brush attachment. Clean from
top to bottom, not side to side. Be careful not to
bend the condenser fins.
3. Shine a flashlight through the condenser to check
for dirt between the fins. If dirt remains: Blow
compressed air through the condenser fins from the
inside. Be careful not to bend the fan blades.
4. Use a commercial condenser coil cleaner. Follow
the directions and cautions supplied with the
cleaner.
5. Straighten any bent condenser fins with a fin comb.
6. Carefully wipe off the fan blades and motor with a
soft cloth. Do not bend the fan blades. If the fan
blades are excessively dirty, wash with warm, soapy
water and rinse thoroughly.
Removal from Service/Winterization
Special precautions must be taken if the ice machine is
to be removed from service for an extended period of
time or exposed to ambient temperatures of 0C (32F)
or below.
1. Disconnect the electric power at the circuit breaker
or the electric service switch.
2. Turn off the water supply.
3. Remove the water from the water trough.
4. Disconnect the drain and the incoming ice-making
water line at the rear of the ice machine.
5. Make sure no water is trapped inside the ice
machine incoming water lines, drain lines,
distribution tubes, etc. Blow compressed air through
the line if necessary.
!
Warning
Disconnect electric power to the ice machine at the
electric service switch before cleaning the
condenser.
!
Warning
The condenser fins are sharp. Use care when cleaning
them.
REMOVE THE
FILTER
!
Caution
If you are cleaning the condenser fan blades with
water, cover the fan motor to prevent water damage.
!
Caution
If water is allowed to remain in the ice machine in
freezing temperatures, severe damage to some
components could result. Damage of this nature is
not covered by the warranty.
Part Number 040006019 08/22 5-1
Section 5
Before Calling for Service
Checklist
If a problem arises during operation of your ice machine, follow the checklist below before calling for service.
Problem Possible Cause To Correct
Ice machine does not operate
No electrical power to the ice machine
Replace the fuse/reset the breaker/turn on
the main switch
Toggle switch set improperly Move the toggle switch to the ON position
Low air temperature around ice machine
Air temperature must be at least 10C
(50F)
Ice machine does not release ice or
is slow to harvest
Ice machine is dirty Clean and sanitize the ice machine
Ice machine is not level Level the ice machine
Low air temperature around ice machine
Air temperature must be at least 10C
(50F)
Ice quality is poor (soft or not clear)
Poor incoming water quality
Contact a qualified service company to
test the quality of the incoming water and
make appropriate filter recommendations
Water filtration is poor Replace the filter
Ice machine is dirty Clean and sanitize the ice machine
Water inlet valve filter screen is dirty
Remove the water inlet valve and clean
the filter screen
Water softener is working improperly (if
applicable)
Repair the water softener
Ice machine produces shallow or
incomplete cubes, or the ice fill
pattern on the evaporator is
incomplete
Water level is low
Be sure the overflow tube is fully seated to
prevent water leakage
Water inlet valve filter screen is dirty
Remove the water inlet valve and clean
the filter screen
Water filtration is poor Replace the filter
Hot incoming water
Connect the ice machine to a cold water
supply
Ice thickness adjustment dial is not set
properly
Adjust the ice thickness adjustment dial
Incorrect incoming water pressure
Water pressure must be 240-620 kPA
(34.8 - 89.9 psi)
Ice machine is not level Level the ice machine
Low ice capacity
Water inlet valve filter screen is dirty
Remove the water inlet valve and clean
the filter screen
Incoming water supply is shut off Open the water service valve
The air filter is dirty Clean the air filter
The condenser is dirty Clean the condenser
Inadequate airflow at the front of the ice
machine
Remove items blocking airflow at the front
of the ice machine
Ice thickness adjustment dial is not set
properly
Adjust the ice thickness adjustment dial
