Manitowoc Sotto - UG Series Technician's Handbook 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.

n

Warning

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.

n

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 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.

n

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.

• 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.

n

Warning

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.

n

Warning

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.

n

Warning

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.

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