Manitowoc UG Series User manual

Part Number: 040006847 12/19
UnderCounter Ice Machines
UG Series
Technician’s Handbook

Safety Notices
Read these precautions before any operation:
• Read this manual thoroughly before operating,
installing or performing maintenance on the
equipment. Failure to follow instructions may result in
personal injury and damage to the ice machine.
• Routine adjustments, maintenance and cleaning
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.
• For the latest version, translated manual or service
provider information, please visit the following
website: www.manitowocice.com
• 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 refrigerants under pressure. The technicians
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.

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

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 connected and grounded in
accordance with state and local electrical codes.
• 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 installation. Connections can
become loose during shipment and installation.
• For a cord-connected appliance, the following must
be included:
• Do not unplug by pulling on cord. To unplug,
grasp the plug, not the cord.
• Unplug from outlet when not in use and before
servicing or cleaning.
• Do not operate any appliance with a damaged
cord or plug, or after the appliance malfunctions
or is dropped or damaged in any manner.
Contact the nearest authorized service
facility for examination, repair, or electrical or
mechanical adjustment

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 installation of this equipment:
• Installation must comply with all applicable
equipment, fire and health codes with the authority
having jurisdiction.
• Connect to a potable water supply only.
• 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 movable 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.
• This equipment contains high voltage electricity and
refrigerant charge. Only refrigeration technicians
who have received appropriate training and
certification, and are aware of the dangers of
handling refrigerants and energized equipment,
are allowed to complete the installation and
maintenance of this equipment.
• The ice machine is installed on a bin and requires
a deflector. If it is installed on a third-party ice bin,
please consult the bin manufacturer to verify that its
deflector matches your ice machine before installing.
• Before installing the third-party bin, please follow
the manufacturer’s installation procedures and
verify that its position and installation meet the
local/national mechanical codes and stability
requirements.

nWarning
Follow these precautions to prevent personal injury
during use and maintenance of this equipment:
• It is the responsibility of the end user 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.

• Do not use high-pressure water guns to spray or
rinse the interior or exterior of the unit. Do not use
power cleaning equipment, steel wool, wire brushes,
scrapers, etc. to clean the exterior of the equipment.
• To prevent tipping, two or more people are needed to
move this appliance.
It is the responsibility of the end user to lock the front
casters after the device has been moved. 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.
• It is the responsibility of the site supervisor to ensure
that operators fully understand the dangers inherent in
operating this equipment.
• Do not operate any equipment with damaged cords
or plugs. All repairs must be performed by a qualified
service company.
• Moisture collecting on the floor will create a slippery
surface. Clean up any water on the floor immediately
to prevent a slip hazard.

nWarning
When installing, using, or servicing this equipment,
follow these flammable refrigeration system
requirements.
• Refer to the nameplate - The ice machine 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.
R290 (propane) may burn if exposed to a heat source
above 470 °C. Refer to nameplate to identify the type
of refrigerant in your equipment.
• To reduce the risk of fire due to improper installation,
replacement of parts, or improper use of procedures,
only refrigeration technicians trained in flammable
refrigerants who understand the dangers of high
voltage electricity and refrigerants under pressure are
allowed to work on this equipment.
• Only use parts recommended or provided by the
manufacturer.
• This equipment must be installed in accordance with
ASHRAE 15 refrigeration system’s safety standards.
• This equipment cannot be installed in a corridor or
hallway of a public building.
• Equipment installation must comply with local
sanitation and fire regulations.
• When servicing this equipment, be sure to lock the
circuit breaker, and display an in-service notice.
• This device contains a high-voltage power supply
and refrigerant charge. Shorting wires to the cooling
system piping may cause an explosion. Before servicing
the system, be sure to disconnect all power to the
system. Refrigerant leakage can result in serious
injury or death from explosion, fire, or contact with
refrigerant or lubricant mist.
• Do not damage the refrigeration circuit when
installing, maintaining or servicing the unit.

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.
• 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.

PAGE INTENTIONALLY LEFT BLANK

Table of Contents
Part Number: 040006847 12/19 13
General Information
Model Numbers................................ 17
This manual covers the following ice machine
models: ...............................17
How to Read A Model Number ................. 18
Model/Serial Number Location ................. 19
Warranty ...................................... 20
Warranty Registration....................20
Installation
General ........................................ 21
Ice Machine Dimensions........................ 21
Location of Ice Machine ........................ 22
Leveling the Ice Machine ....................... 23
Cooling of the Ice Machine ..................... 23
Water Service/Drains........................... 24
Electrical Service ............................... 26
Voltage ................................26
Fuse/Circuit Breaker .....................26
Total Circuit Ampacity....................26
Installation Checklist ........................... 28
Before Starting the Ice Machine ................ 29
Operation
Component Identification ...................... 31
Ice Making Sequence of Operation.............. 32
Initial Start-up ..........................32
Operational Checks............................. 34
General................................34
Cube Shape ............................34
Ice Cube Thickness Check.................35

14 Part Number: 040006847 12/19
Maintenance
General ........................................ 36
Cleaning/Descaling & Sanitizing Procedure...... 37
Exterior Cleaning ........................38
Detailed Descaling & Sanitizing Procedure ...... 39
Component Removal ........................... 43
Top Cover ..............................43
Water Curtain ..........................44
Water Shutters..........................45
Water Curtain ..........................45
Ice Chute ..............................46
Spray Bar ..............................47
Sump Drain Overflow Tube................48
Cleaning the Condenser ........................ 49
Air-Cooled Condenser....................49
Removal from Service/Winterization............ 50
Air-Cooled Ice Machines..................50
Troubleshooting
Questions to Ask The Customer................. 51
Ice Machine Will Not Run....................... 52
Compressor Won’t Run...................52
Water Pump Won’t Run ..................56
Ice Machine Prematurely Harvests .............. 57
Ice Machine Will Not Harvest ................... 57
Water System Checklist......................... 58
Ice Production Check ........................... 59
Analyzing Discharge Pressure ................... 61
Discharge Pressure High Checklist............... 62
Freeze Cycle Discharge Pressure Low Checklist .. 62
Suction Pressure High Checklist ................. 63
Suction Pressure Low Checklist ................. 64
Discharge Line Temperature Analysis............ 65

Part Number: 040006847 12/19 15
Component Check Procedures
Electrical Components.......................... 67
ON/OFF/Wash Toggle Switch ..............67
Bin Thermistor (T3) ......................68
Sump Water Thermistor (T1) & Liquid Line
Thermistor (T2) .........................70
Hot Gas Valve...........................77
Flammable Refrigerant Procedures
Servicing Requirements ........................ 81
Refrigerant Purging Requirements .........82
Refrigerant Purging Procedure.............83
Brazing Procedure .......................83
Pressure Testing.........................84
Evacuation .............................84
Refrigerant Charging ........................... 85
System Contamination Cleanup................. 87
Determining Severity of Contamination .....87
Mild System Contamination Cleanup Procedure
......................................89
Severe System Contamination Cleanup
Procedure..............................90

16 Part Number: 040006847 12/19
Charts
Cycle Times/24-Hour Ice Production/Refrigerant
Pressure Charts ................................ 93
UGP020 Self-Contained Air-Cooled .........94
UGP020 Operating Temperatures ..........95
UGP030 Self-Contained Air-Cooled .........96
UGP030 Operating Temperatures ..........97
UGP040 Self-Contained Air-Cooled .........98
UGP040 Operating Temperatures ..........99
UGP080 Self-Contained Air-Cooled ........100
UGP080 Operating Temperatures .........101
UGE0030A Self-Contained Air-Cooled ......103
UGF0040A Self-Contained Air-Cooled ......104
UGF0050A Self-Contained Air-Cooled ......105
UGF0065A Self-Contained Air-Cooled ......106
UGF0080A Self-Contained Air-Cooled ......107
Wiring Diagrams
Wiring Diagrams ..............................109
Wiring Diagram Legend .................109
UGE0020A Air-Cooled...................110
UGP0020A Air-Cooled...................112
UGE0030A/UGF0040A/UGF0050A/UGF0065A
Air-Cooled ............................114
UGP0030A/UGP0040A/UGP0050A Air-Cooled..
.....................................116
UGF0080A Air-Cooled ..................118
UGP0080A Air-Cooled...................120
Tubing Schematics ............................122
UG0020A .............................122
UG0030A/UG0040A/UG0065A ...........123
UG0050A/UG0080A ....................124

Part Number: 040006847 12/19 17
Model Numbers
THIS MANUAL COVERS THE FOLLOWING ICE MACHINE
MODELS:
Self-Contained Air-Cooled
UGE0020A UGP0020A
UGE0030A UGP0030A
UGF0040A UGP0040A
UGF0050A UGP0050A
UGF0065A ----
UGF0080A UGP0080A
NOTE: The model suffix is used to identify the voltage, special
model, or country-specific model. See “How to Read A Model
Number” on Page “How to Read A Model Number” on page 18.
General Information

18 Part Number: 040006847 12/19
How to Read A Model Number
Ice Machine Model
Refrigerant
Nominal Production
Condenser Type
A - Self-Contained Air-Cooled
Blank: Non-market specific S: Saudi Arabia C: China D: Germany E: WARAS N: Brazil
F = Schuko G = Blade Z = No Plug/Bare Lead I =
Oblique Flat Blades with Ground
B = 115 V Grounded Power Cord
Voltage
161 - 115/60/1 261 - 208-230/60/1 251 - 230/50/1
P - R290 F - R404A E - R1B4a

Part Number: 040006847 12/19 19
Model/Serial Number Location
Model/Serial Number
Location

20 Part Number: 040006847 12/19
Warranty
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.
WARRANTY REGISTRATION
Completing the warranty registration process is a quick and
easy way to protect your investment.
Scan the QR code with your smart device or enter the link
in a web browser to complete your warranty registration.
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REGISTRATION
Registering your product insures warranty coverage and
streamlines the process if any warranty work is required.