Manitowoc UR0140A, UD0140W, UD0140AE, UY0140AE, UR0140AE Installation, Operation And Maintanance Manual
...
NEO™ Ice Machines
UnderCounter - Air-cooled & Water-cooled
Installation, Operation and Maintenance Manual
This manual is updated as new information and models are released. Visit our website for the latest manual.
Part Number: 040002909 11/13
Section 1
General Information
Model Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Section 2
Installation Instructions
Location of Ice Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Ice Machine Heat of Rejection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Leveling the Ice Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Electrical Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Water Service/Drains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Water Supply and Drain Line Sizing/Connections . . . . . . . . . . . . . . . . . . . . . . . . 11
Before Starting the Ice Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Installation Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table of Contents
Bin Caster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Arctic Pure Water Filter System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Manitowoc Cleaner and Sanitizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Fuse/Circuit Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Total Circuit Ampacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Ground Fault Circuit Interrupter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Water Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Water Inlet Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Drain Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Cooling Tower Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Water Level Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Water/Drain Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Section 3
Operation
Touch Pad Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
On/Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Clean . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Bin Full . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Ice Making Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Safety Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Part Number 040002909 11/13 1
Section 4
Maintenance
Section 5
Customer Support
Table of Contents (continued)
Interior Cleaning and Sanitizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Cleaning and Sanitizing Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Remove Parts for Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Preventative Maintenance Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Ice Machine Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Exterior Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Cleaning the Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Removal from Service/Winterization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Safety Limit Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Commercial Ice Machine Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Residential Ice Machine Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2 Part Number 040002909 11/13
Section 1
!
Warning
!
Caution
Important
!
Warning
General Information
Model Numbers
This manual covers the following models:
Self-Contained
Air-Cooled
UD0140A UD0140W
UD0140AE --
UY0140A UY0140W
UY0140AE --
UR0140A --
UR0140AE --
UD0190A --
UD0190AE --
UY0190A --
UY0190AE --
UR0190A --
UR0190AE --
UD0240A UD0240W
UD0240AE UD0240WE
UY0240A UY0240W
UY0240AE UY0240WE
UR0240A --
UR0240AE --
UD0310A UD0310W
UD0310AE --
UY0310A UY0310W
UY0310AE --
UR0310A UR0310W
UR0310AE --
Self-Contained
Water-Cooled
Read These Before Proceeding:
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 this appliance.
Proper installation, care and maintenance are
essential for maximum performance and troublefree operation of your equipment. Visit our website
www.manitowocfsg.com for manual updates,
translations, or contact information for service
agents in your area.
Routine adjustments and maintenance procedures
outlined in this manual are not covered by the
warranty.
Part Number 040002909 11/13 3
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.
General Information Section 1
!
Warning
!
Warning
!
Warning
!
Warning
!
Warning
!
Warning
!
Warning
!
Warning
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Warning
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Warning
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Warning
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Warning
!
Warning
Do not use electrical appliances or accessories
other than those supplied by Manitowoc for your ice
machine model.
Personal injury is possible when moving this
equipment. Two or more people aware of the
possible lifting and moving hazards are required
when moving or relocating this equipment.
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.
Do not clean with water jet.
It is the responsibility of the equipment owner to
perform a Personal Protective Equipment Hazard
Assessment to ensure adequate protection during
maintenance procedures.
Only trained and qualified personnel aware of the
dangers of refrigerant under pressure, electrical
shock, and incorrect lifting/moving hazards, should
install, maintain or service this equipment.
Read this manual thoroughly before operating,
installing or performing maintenance on the
equipment.
Do not damage the refrigeration circuit when
installing, maintaining or servicing the unit.
All covers and access panels must be in place and
properly secured, before operating this equipment.
Do not obstruct machine vents or openings.
Do not store gasoline or other flammable vapors or
liquids in the vicinity of this or any other appliance.
Do not damage the refrigeration circuit when
installing, maintaining or servicing the unit.
Clean up any water or ice on counter or floor to
prevent personal injuries. Always inspect the
equipment for leakage after cleaning, maintenance
or service procedures are performed.
4
Part Number 040002909 11/13
Section 1 General Information
Accessories
Contact your Manitowoc distributor for these optional
accessories:
BIN CASTER
Replaces standard legs.
ARCTIC PURE WATER FILTER SYSTEM
Engineered specifically for Manitowoc ice machines,
Arctic Pure water filters are an efficient, dependable, and
affordable method of inhibiting scale formation, filtering
sediment, and removing chlorine taste and odor.
MANITOWOC CLEANER AND SANITIZER
Manitowoc Ice Machine Cleaner and Sanitizer are
available in convenient 16 oz. (473 ml) and 1 gal (3.78 l)
bottles. These are the only cleaner and sanitizer
approved for use with Manitowoc products.
Cleaner Part Number Sanitizer Part Number
16oz 94-0456-3 16oz 94-0565-3
1 Gallon 94-0580-3 1 Gallon 94-0581-3
LUMINICE™
The LuminIce™ growth inhibitor recirculates the air in
the ice machine foodzone over a UV bulb. This process
will inhibit the growth of common micro-organisms on all
exposed foodzone surfaces.
• LuminIce™ bulbs require replacement on a yearly
basis.
Cleanup Procedure for Accidental Bulb Breakage
The cleanup procedure is identical to the procedure
used to clean up compact fluorescent (CFL) or
fluorescent tube lights. These lights contain a small
amount of mercury sealed within a glass tube. Breaking
these types of lights will release mercury and mercury
vapor. The broken bulb can continue to release mercury
vapor until it is cleaned up and removed.
The latest EPA procedures can be viewed on their
website at www.epa.gov/cfl/cflcleanup.html.
Part Number 040002909 11/13 5
General Information Section 1
THIS PAGE INTENTIONALLY LEFT BLANK
6
Part Number 040002909 11/13
Section 2
!
Caution
!
Warning
!
Caution
!
Warning
Installation Instructions
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 40°F (4°C), but
must not exceed 110°F (43°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.
• 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.
• The location must not be near garbage or other
contaminants.
• The ice machine must use legs or be sealed to the
floor. Before sealing to the floor the rubber bumpers
on the bottom of the ice machine must be removed.
Self-Contained
Air-Cooled
Top/Sides 5" (127 mm)* 5" (127 mm)*
Back 5" (127 mm)* 5" (127 mm)*
Self-Contained
Water-Cooled
Ice Machine Heat of Rejection
Series
Ice Machine
U140 2400 2900
U190 2200 2600
U240 2400 3400
U310 3800 6000
* 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 aircooled ice machines are installed.
Two or more people or a lifting device are required
to lift this appliance.
Air Conditioning** Peak
Heat of Rejection*
Leveling the Ice Machine
1. Screw the leveling legs onto the bottom of the ice
machine.
2. Screw the foot of each leg in as far as possible.
The legs must be screwed in tightly to prevent them
from bending.
3. Move the ice machine into its final position.
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.
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” Section 4.
Part Number 040002909 11/13 7
Do not obstruct ice machine vents or openings.
4. Level the ice machine by using a level on top of the
ice machine. Turn each foot as necessary to level
the ice machine from front to back and side to side.
Installation Instructions Section 2
!
Warning
!
Caution
!
Warning
!
Warning
Electrical Service
GENERAL
All wiring must conform to local, state and national
codes.
Operate equipment only on the type of electricity
indicated on the specification plate.
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).
The 115/1/60 ice machines are factory pre-wired with a
8’ power cord, and NEMA 5-15P-plug configuration.
The 208-230/1/60 and 230/50/1 ice machines are
factory pre-wired with a 8’ power cord only, no plug is
supplied.
FUSE/CIRCUIT BREAKER
A separate fuse/circuit breaker must be provided for
each ice machine.
TOTAL CIRCUIT AMPACITY
The total circuit ampacity is used to help select the wire
size of the electrical supply.
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.
GROUND FAULT CIRCUIT INTERRUPTER
Ground Fault Circuit Interrupter (GFCI/GFI) protection is
a system that shuts down the electric circuit (opens it)
when it senses an unexpected loss of power,
presumably to ground. Manitowoc does not recommend
the use of a GFCI/GFI circuit protection with our
equipment. If code requires the use of a GFCI/GFI then
you must follow the local code. The circuit must be
dedicated, sized properly and there must be a panel
GFCI/GFI breaker. We do not recommend GFCI/GFI
outlets as they are known for more intermittent nuisance
trips than panel breakers.
If the supply cord is damaged, do not operate the
equipment until the cord is replaced by a service
agent or similarly qualified person.
The ice machine must be grounded in accordance
with national and local electrical codes.
8
Part Number 040002909 11/13
Section 2 Installation Instructions
ELECTRICAL SPECIFICATIONS
Ice Machine Volta ge
Phase
Cycle
U140 115/1/60 15 5.0 15 5.0
208-230/1/60 15 2.5 -- --
230/1/50 15 2.5 -- --
U190 115/1/60 15 6.0 -- --
208-230/1/60 15 2.5 -- --
230/1/50 15 2.5 -- --
U240 115/1/60 15 7.0 15 6.0
208-230/1/60 15 4.0 15 3.0
230/1/50 15 4.0 15 3.0
U310 115/1/60 15 10.0 15 10.0
208-230/1/60 15 4.5 15 4.0
230/1/50 15 4.5 -- --
Maximum Fuse/
Circuit Breaker
Air-Cooled Water Cooled
Total Amps Maximum Fuse/
Circuit Breaker
Total Am ps
Part Number 040002909 11/13 9
Installation Instructions Section 2
!
Caution
Important
!
Warning
Important
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.
Plumbing must conform to state and local codes.
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.
For ice making, connect to a potable water supply
only.
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
(80 psig-551.5 kPA) recommended pressure, 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.
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 inch drop per 5 feet 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 and water-cooled condenser drain
lines. Insulate them to prevent condensation.
• Vent the ice machine drain. Do not vent the
condenser drain on water-cooled models.
COOLING TOWER APPLICATIONS
(Water-Cooled Models)
A water cooling tower installation does not require
modification of the ice machine. The water regulator
valve for the condenser continues to control the
refrigeration discharge pressure.
It is necessary to know the amount of heat rejection and
the pressure drop through the condenser and water
valves (inlet and outlet) when using a cooling tower on
an ice machine.
• Water entering the condenser must not exceed 90°F
(32°C).
• Water flow through the condenser must not exceed 5
gallons (19 liters) per minute.
• Allow for a pressure drop of 7 psi (48 kPA) between
the condenser water inlet and the outlet of the ice
machine.
• Water exiting the condenser must not exceed 110°F
(43°C).
10
The Commonwealth of Massachusetts requires
that all water-cooled models must be connected
only to a closed loop, cooling tower system.
Part Number 040002909 11/13
Section 2 Installation Instructions
Thinner
Bridge
Factory
Default
Setting
Thicker
Bridge
B
D
C
A
Water Supply and Drain Line Sizing/Connections
Location Water
Temperature
Ice Making
Water Inlet
40°F (4°C) Min.
90°F (32°C) Max.
20 psi (137.9 kPA) Min.
80 psi (551.5 kPA) Max.
Water
Pressure
Condenser Water
Inlet
Condenser Water
40°F (4°C) Min.
90°F (32°C) Max.
--- --- 1/2" Female Pipe
20 psi (137.9 kPA) Min.
150 psi (1034.2 kPA) Max.
Drain
--- --- 1/2" Female Pipe
Bin Drain
ICE THICKNESS ADJUSTMENT
The ice thickness can be adjusted to three levels.
1. Pull forward on the bottom of the bracket until clear
of the tab.
2. Slide the bracket over the desired tab and release.
• The center position is the normal factory setting.
• To increase bridge thickness, raise the water level.
• To decrease bridge thickness, lower the water level.
Ice Machine
Fitting
3/8" Female Pipe
Thread
3/8" Female Pipe
Thread
U310 Only
1/2" Female Pipe
Thread
Tubing Size Up to Ice
Machine Fitting
3/8" (9.5 mm) minimum
inside diameter
3/8" (9.5 mm) minimum
inside diameter
U310 Only
1/2" (12.7 mm)
minimum inside diameter
1/2" (12.7 mm) minimum
Thread
inside diameter
1/2" (12.7 mm) minimum
Thread
inside diameter
WATER/DRAIN CONNECTIONS
A. Potable Water Inlet
B. Drain
C. Condenser Water Inlet - (Water-cooled Only)
D. Condenser Water Outlet - (Water-cooled Only)
Part Number 040002909 11/13 11
Installation Instructions Section 2
!
Warning
Before Starting the Ice Machine
All Manitowoc ice machines are factory-operated and adjusted before shipment. Normally, new installations do not
require any adjustment.
To ensure proper operation, follow the Operational Checks in Section 3 of this manual. Starting the ice machine and
completing the Operational Checks are the responsibilities of the owner/operator.
Adjustments and maintenance procedures outlined in this manual are not covered by the warranty.
Do not operate equipment that has been misused,
abused, neglected, damaged, or altered/modified
from that of original manufactured specifications.
Installation Checklist
Is the ice machine drain vented?
Is the ice machine level?
Are all electrical leads free from contact with
refrigeration lines and moving equipment?
Has all of the internal packing been removed?
Has the owner/operator been instructed
Have all of the electrical and water connections
been made?
regarding maintenance and the use of
Manitowoc Cleaner and Sanitizer?
Has the supply voltage been tested and
checked against the rating on the nameplate?
Is there proper clearance around the ice
machine for air circulation?
Is the ice machine grounded and polarity
correct?
Has the ice machine been installed where
ambient temperatures will remain in the range
of 40° – 110°F (4° – 43°C)?
Has the ice machine been installed where the
incoming water temperature will remain in the
range of 40° – 90°F (4° – 32°C)?
Is there a separate drain for the water-cooled
condenser?
Is there a separate drain for the bin?
Has the owner/operator completed the warranty
registration card?
Has the ice machine and bin been sanitized?
Has the On/Off button been pressed?
12
Part Number 040002909 11/13
Section 3
On/Off - Blue = Machine On
Off = Machine Is Off
Delay - Blue = Delay Mode On
Off = Delay Mode Is Off
Clean - Yellow = Clean Cycle On
Off = Cleaning is Off
Bin Full - Blue = Bin Is Full
Off = Bin Is Not Full
Service - Red = Needs Service
Off = Doesn’t Need Service
Operation
Touch Pad Features
The touch pad offers a series of pressure sensitive
buttons to control ice machine operation and provide
operational status.
ON/OFF
The On/Off Button is used to start and stop ice making.
The blue light indicates whether the ice machine is in Ice
Making (light on) or Off (light off).
NOTE: If ice is on the evaporator (during the freeze or
harvest cycle) and the On/Off button is pressed; the next
cycle will have a thick slab of ice. Press the On/Off
button and allow the ice to melt off the evaporator, then
start a new freeze cycle.
DELAY
Pressing the Delay button will start a delay period. The
ice machine will finish the freeze and harvest cycle and
then start the delay period.
• Pressing the button once will start a 4 hour delay
period.
• Pressing the button twice will start a 12 hour delay
period.
• Pressing the button three times will start a 24 hour
delay period.
• Pressing the button four times will cancel the delay
periods.
NOTE: The delay period will be canceled if power is
interrupted to the ice machine. When power is restored,
the ice machine will start an ice making cycle.
CLEAN
Pressing the Clean button for 3 seconds will start a clean
cycle. After the clean cycle is complete, the ice machine
will automatically start an ice making cycle.
• Pressing the Clean button again within 45 seconds of
the clean cycle starting will abort the clean cycle.
• Pressing the On/Off button anytime during the Clean
cycle will de-energize the On/Off LED and the ice
machine will stop after the Clean cycle is complete.
• Pressing the Clean button will pause the Clean cycle.
The On/Off and Clean lights will flash on/off to
indicate pause mode. Pressing the Clean button
again will continue the Clean cycle from the point of
interruption.
NOTE: Opening the ice damper in the clean cycle for 2
seconds will pause the clean cycle. Opening the ice
damper for 30 seconds will cancel the clean cycle.
Part Number 040002909 11/13 13
BIN FULL
The Bin Full light energizes when the bin is full or is deenergized if the bin is not full.
SERVICE
The service light indicates the machine needs attention.
• Refer to Section 5 for more information if this light is
energized.
Operation Section 3
Ice Making Sequence of Operation
NOTE: The On/Off button must be depressed and the
ice damper must be closed before the ice machine will
start.
Water Purge Cycle
The ice machine purges any remaining water from the
water trough down the drain.
Freeze Cycle
Prechill - The refrigeration system chills the evaporator
before water flow over the evaporator starts. The water
inlet valve energizes during the pre-chill and remains on
until the ice thickness float switch is satisfied.
Freeze - Water flowing across the evaporator freezes
and builds ice on the evaporator. After a sheet of ice has
formed, the harvest float switch signals the control board
to start a harvest cycle.
Harvest Cycle
Any remaining water is purged down the drain as
refrigerant gas warms the evaporator. When the
evaporator warms, the sheet of cubes slides off the
evaporator and into the storage bin. If all cubes fall clear
of the ice damper the ice machine starts another freeze
cycle.
Full Bin Cycle
If the ice damper is held open by ice cubes the ice
machine shuts off. When the ice damper closes the ice
machine starts a new cycle at the water purge.
Control Board Timers
The control board has the following non-adjustable
timers:
SAFETY LIMITS
Safety limits are stored and indicated by the control
board. The number of cycles required to stop the ice
machine varies for each safety limit.
Safety limits can be reset by pressing the On/Off button
and starting a new ice making cycle.
A safety limit is indicated by a flashing Service Light on
the touch pad. Refer to Section 5 if you receive a safety
limit indication.
• Safety Limit 1 - If the freeze time reaches 60 minutes,
the control board automatically initiates a harvest
cycle. If 6 consecutive 60-minute freeze cycles occur,
the ice machine stops.
• Safety Limit 2 - If the harvest time reaches 3.5
minutes, the control board automatically returns the
ice machine to the freeze cycle. If 500 consecutive
3.5 minute harvest cycles occur, the ice machine
stops.
• Safety Limit 3 - If the freeze time reaches 4 minutes
and water is not sensed, the ice machine stops and
initiates a 30 minute delay period. The ice machine
will automatically restart at the end of the 30 minute
delay period. If 100 consecutive failures occur the ice
machine stops.
• The ice machine is locked into the freeze cycle for 6
minutes before a harvest cycle can be initiated.
• The maximum freeze time is 60 minutes at which
time the control board automatically initiates a
harvest sequence.
• The maximum harvest time is 3.5 minutes. The
control board automatically initiates a freeze
sequence when these times are exceeded.
14
Part Number 040002909 11/13
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