Installation and
User's Manual for
Cuber Model CU0515
CU0515
INTRODUCTION
This manual provides the specifications and the
step-by-step procedures for the installation,
startup, operation, maintenance and cleaning for
the CU0515 ice machine.
NOTE. To retain the safety and performance built
into this ice machine, it is important that installation
and maintenance be conducted in the manner
outlined in this manual.
Table of Contents
Specifications · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 2
General Information And Installation · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 3
Water Supply And Drain Connections · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 4
Final Check List · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 5
Operating Instructions · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 6
Operational Checks · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 7
Component Description · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 8
Operation - Electrical Sequence · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 9
Freeze Cycle· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 10
Cleaning Switch · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 11
Service Diagnosis · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 12
Service Diagnosis · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 13
Maintenance And Cleaning Instructions · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 14
Cleaning Water System · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 15
April 2007
Page 1
CU0515
Specifications
The ice machine must be installed indoors in a
controlled environment.
Air Temp
Minimum
Maximum
500F.
950F.
0
UNPACKING AND INSPECTION
1. Call your authorized SCOTSMAN Distributor or
Dealer for proper installation.
2. Remove the front panel of the unit and inspect
for any concealed damage. Notify carrier of your
claim for the concealed damage.
0
Water Temp
40 F.
100 F.
Water Pressure
20 PSI
80 PSI
Voltage
103.5
126.5
Operating the ice machine outside of the above
limitations, or outdoors, is potentially damaging to
the machine, and it is misuse of the machine. This
may void the warranty.
Scotsman Ice Systems are designed and
manufactured with the highest regard for safety
and performance. They meet or exceed the
standards of agencies like NSF and UL..
3. Check that refrigerant lines do not rub against or
touch other lines or surfaces, and that the fan
blade moves freely.
4. Check that the compressor fits snugly onto all its
mounting pads.
5. Remove all internal support packing and
masking tape.
Scotsman assumes no liability or responsibility of
any kind for products manufactured by Scotsman
hat have been altered in any way, including the
use of any part and/or other components not
specifically approved by Scotsman.
Scotsman reserves the right to make design
changes and/or improvements at any time.
Specifications and design are subject to change
without notice.
Model
CU0515GA-1A
Dimensions
Basic Electrical
Max Fuse Size
115/60/1
15
April 2007
Page 2
CU0515
General Information And Installation
This model is supplied from the factory completely
pre-wired and require only electrical power
connections to the wire cord provided at rear of the
unit.
Make sure that the ice machine is connected to its
own circuit and individually fused (see data plate
for maximum fuse size). This is a cord-connected
unit designed for 115 volt AC power, with a
maximum fuse size of 15 amps.
Warranty
The warranty statement for this product is provided
separately from this manual. Refer to it for
applicable coverage. In general warranty covers
defects in material or workmanship. It does not
cover maintenance, corrections to installations, or
situations when the machine is operated in
circumstances that exceed the limitations printed in
this manual.
Low voltage can cause improper operation and
may be responsible for serious damage to the
overload switch and motor windings that is not
covered by warranty.
NOTE. All external wiring should conform to
national, state and local standards and regulations.
Check voltage on the line and the ice maker’s data
plate before connecting the unit. Extension cords
must not be used.
Location: If the unit is built into a cabinet with no
side ventilation, the ice production will be reduced
by 20% of rated capacity, restricted space of an
inch or so on each side will cause a 10%
reduction. Six inches of space to the left and right
will allow the unit to operate satisfactorily.
The daily ice-making capacity is directly related to
the condenser air inlet temperature, water
temperature, conditions of the condenser air filter
and age of the machine.
To keep your SCOTSMAN CUBER at peak
performance levels, periodic maintenance checks
must be carried out as indicated on Maintenance
and Cleaning section of this manual.
April 2007
Page 3
CU0515
Water Supply And Drain Connections
General
Water Drain
When choosing the water supply for the ice cuber
consideration should be given to:
The recommended drain tube is a plastic or flexible
tube with 18 mm (3/4") I.D. which runs to an open
trapped and vented drain.
a) Length of run
Note: Although soft, easily kinked vinyl tubing is
not recommended for a drain, a short length of ¾”
ID vinyl tubing is required to connect a rigid drain
tube to the 20 mm (25/32”) fitting on the back of
the machine.
b) Water clarity and purity
c) Adequate water supply pressure
Low water pressure, below 20 psi may cause a
malfunction.
Water containing excessive minerals will tend to
produce cloudy colored ice cubes, plus scale
build-up on parts of the water system.
Water Supply
The recommended water supply line is a 3/8" o.d.
copper tube, the water pressure must have a
minimum incoming pressure of 20 psig.
NOTE. The water supply and the water drain must
be installed to conform to the local code. In some
case a licensed plumber and/or a plumbing permit
is required.
Connect the tubing to the 3/4" GAS / BSPP thread
water inlet fitting at the back of the ice maker. An
adapter is available, the part numbers are:
F733219-03 and F640134-00.
Water Inlet
Connection
Water Drain
Connection
Back View of Utility Connections
April 2007
Page 4
CU0515
Final Check List
1. Is the unit in a room where ambient
temperatures are above a minimum of 10oC (50 oF)
even in winter months?
8. Have the bolts holding the compressor down
been checked to ensure that the compressor is
snugly fitted onto the mounting pads?
2. Is there at least a 15 cm (6") clearance around
the unit for proper air circulation?
9. Have the bin liner and cabinet been wiped
clean?
3. Is the unit level? (IMPORTANT)
10. Has the owner/user been given the User
Manual and been instructed on the importance of
periodic maintenance checks?
4. Have all the electrical and plumbing connections
been made, and is the water supply shut-off valve
open?
5. Has the voltage been tested and checked
against the data plate rating?
6. Has the water supply pressure been checked to
ensure a water pressure of at least 20 psi.
7. Check all refrigerant lines and conduit lines to
guard against vibrations and possible failure.
11. Has the Manufacturer’s registration card been
filled in properly? Check for correct model and
serial number against the serial plate and mail the
registration card to the factory.
12. Has the owner been given the name and the
phone number of the authorized SCOTSMAN
Service Agency serving him?
April 2007
Page 5
CU0515
Operating Instructions
Start Up
After having correctly installed the ice maker and
completed the plumbing and electrical
connections, perform the following “Start-up”
procedure.
NOTE. During the charging cycle, the water inlet
solenoid valve is energized. The water flows
through the valve to the back side of the
evaporator platen and then down to fill up the ice
machine sump for the next freezing cycle.
A. Remove the condenser air filter then remove the
front panel, Locate the cleaning switch on the
control box.
B. Switch the cleaning switch to the cleaning
position. This will close the electrical circuit to the
water inlet valve and to the hot gas valve
C. Switch the power ON and push the green button
switch. Unit will start up in charging cycle mode.
During this cycle the components energized are:
· Water Inlet Solenoid Valve
· Hot Gas Solenoid Valve
· Water Pump
· Fan Motor
D. Operate the unit in the water charging cycle for
about three/four minutes till water flows out from
the drain hose, then move the cleaning switch to
the operation position.
Air Filter Removal
Green Power
Switch
Cleaning
Switch
Front View With Front Panel Removed
April 2007
Page 6
CU0515
Operational Checks
E. The unit now starts its first freezing cycle with
the following components in operation:
Remove the ice from the storage bin thermostat.
The ice maker should restart automatically in
three-four minutes.
· Compressor
· Water Pump
· Fan Motor
NOTE. The bin thermostat is factory set at 1oC
(35oF) OUT and 4oC (39oF) IN.
F. Look through the ice discharge opening and
confirm that the spray system is correctly seated
and that the water jets uniformly reach the interior
of the inverted cup molds; also make sure that the
plastic curtain is hanging freely and excessive
water is not flowing through it.
M. Re-attach the front panel, then instruct the
owner/user on the general operation of the ice
machine and about the cleaning and care it
requires.
G. During the freeze cycle, the evaporator will
remove heat from the water sprayed into the ice
making molds and warm air will be discharged
from the cabinet.
H. When the evaporator temperature reaches a
preset value the evaporator thermostat or cube
size control changes its contacts; the freezing
cycle ends and starts the defrost or harvest cycle.
Freezing time will range between 20 and 22
minutes in a 70oF ambient temperature. Longer
time for temperature above, shorter when below.
Average complete cycle range is about 23 to 25
minutes.
Small
Indent
Normal Size and Shape
I. Check, during the first defrost/harvest cycle, that
the incoming water flows correctly into the sump to
re-fill it and the surplus overflows through the
overflow drain tube.
J. Check the size and shape of the ice cubes just
released. Right size must have a small depression
about 3/16” in their crown. If not, wait for the
second defrost/harvest cycle before performing
any adjustment.
Shallow Cube
Cube too Small
K. If required, adjust the length of the freezing
cycle by turning the knob of the cube size control
or evaporator thermostat located in front of the
control box until the correct ice cube size is
achieved.
If the ice cubes are shallow and cloudy, it is
possible that the ice maker runs short of water
during the end of the freezing cycle or, the quality
of the supplied water requires the use of an
appropriate water filter or conditioner.
L. During the defrost or harvest cycle hold a
handful of ice cubes against the bulb of the storage
bin thermostat; the ice machine switch OFF in
about one-two minutes.
April 2007
Page 7
Thick Bulge
Oversized
CU0515
Component Description
Water Pump
The water pump operates continually throughout
the freezing cycle. The pump forces the water from
the sump to the spray system and through the
spray nozzles so it sprays into the inverted cup
molds to be frozen into crystal clear ice cubes.
Water Inlet Solenoid Valve
The water inlet solenoid valve is energized only
during the defrost cycle. When energized it allows
a metered amount of incoming water to flow over
the evaporator cavity to assist the hot gas in
defrosting the ice cubes.
The water running over the evaporator cavity drops
by gravity, through the weep holes of the platen,
into the sump.
Hot Gas Solenoid Valve
The hot gas solenoid valve consists basically in
two parts: the valve body and the valve coil.
Located on the hot gas line, this valve is energized
by the contacts 3-2 of the evaporator thermostat
during the defrost cycle.
Water Circuit, Freeze Cycle
During the defrost cycle the hot gas valve coil is
activated so to attract the hot gas valve piston in
order to give way to the hot gas discharged from
compressor to flow directly into the evaporator
serpentine to defrost the formed ice cubes.
Bin Thermostat
The bin thermostat control body is located in the
front of control box behind the front louvered panel.
The thermostat sensing tube is located into a bulb
holder on the side wall of the ice storage bin where
it automatically shuts the ice machine OFF when in
contact with the ice and re-starts the ice machine
when the ice is removed. Factory settings are 1oC
(35oF) OUT and 4oC (39oF) IN.
Cube Size Control (Evaporator Thermostat)
The cube size control (evaporator thermostat)
body is located in the front of control box behind
the front louvered panel; it’s basically a reverse
acting temperature control which closes contacts
3-2 when its temperature decreases and closes
the opposite contacts 3-4 when the temperature
rises.
April 2007
Page 8
Water Circuit, Harvest Cycle
CU0515
Operation - Electrical Sequence
The following charts illustrate which switches and
components are ON or OFF during the two phases
of the icemaking cycle.
Refer to the wiring diagram for reference.
FREEZING CYCLE
Electrical components
Compressor
Water Pump
Fan Motor
Hot Gas Valve
Inlet Water Valve
Electrical Controls
Evaporator Thermostat (contacts 3-4)
Evaporator Thermostat (contacts 3-2)
Bin Thermostat
ON
•
•
•
•
•
CLOSE
•
OFF
OPEN
•
•
HARVEST CYCLE
Electrical components
Compressor
Water Pump
Fan Motor (Air cooled only)
Hot Gas Valve
Inlet Water Valve
Electrical Controls CLOSE OPEN
Evaporator Thermostat (contacts 3-4)
Evaporator Thermostat (contacts 3-2)
Bin Thermostat
ON
•
OFF
•
•
•
•
•
•
•
April 2007
Page 9
CU0515
Cleaning Switch
Located on the bottom side of the control box, it is
used to energize the water inlet and the hot gas
valves to fill the sump of the machine with water
when needed.
Green Master Switch Push Button
· Red socket for the Water Level Sensor (future
use)
· Black socket for the Condenser Sensor and
· White socket for the Red Alarm Re-Set Push
Located in the front of the machine (just beside the
Master Switch) it works in conjunction with the
Cleaning Remind Board and it’s activated when:
Button
The main function of this PC Board is to switch the
machine OFF when the condensing temperature is
too high or signal the need for cleaning the
condenser air filter or the water system. The time
between the signal for the cleaning of the water
system can be modified according to the setting of
the two Dip Switches as below:
1. ON steady with machine in OFF mode
Time
1
2
Condensing temperature is higher then 70 oC or
158oF. (air cooled version)
1 Month
On
On
3 Months
Off
On
2. Blinking twice and repeat with machine in OFF
mode
6 Months
On
Off
1 Year
Off
Off
Located in the front of the machine it’s used to
switch ON and OFF the unit by pushing its green
push button. When ON, its green light is ON.
Red Alarm/Re-Set Push Button
Condenser sensor out of order.
Once the water system has been cleaned, push
and hold the Red Alarm Re-Set Button for more
then 20 seconds until it starts to blink. That will
reset the control.
3. ON steady with machine in ON mode
Condenser air filter needs to be cleaned.
4. Slow blinking with machine in ON mode.
Condenser Air Filter
Water system needs to be cleaned.
In the first case the machine can be Re-Set by
pushing and holding the Red Alarm Re-Set Button
for 5 seconds till the Red Light is OFF.
In the second case, first replace the condenser
sensor then, push and hold the Red Re-Set Button
for 5 seconds.
Condenser Sensor
The condenser temperature sensor probe, located
within the condenser fins detects the condenser
temperature variations and signals them by
supplying current, at low voltage, to the P.C.
BOARD.
Cleaning Reminder PC Board
Located on the front left side of the machine, it
works in conjunction with the condenser sensor
and the Red Alarm Re-Set Push Button.
It consists of
In case the condenser temperature rises and
reaches 70oC (160oF) – the control system will
cause an immediate and total stop of the
machine’s operation.
· Printed Circuit Board with a step down
transformer (115V - 12V)
· Relay
· Dip Switch with two keys
· Jumper for the set up of the Cut OFF/Alarm
It is located in front of the air cooled condenser. It
can be removed by pulling it through the opening
in the front panel for cleaning or replacing. A lower
plastic guide, installed inside the unit, is used for
the correct sliding and location of the air filter.
condensing temperature (70oC 158oF.- jumper
OUT - for air cooled)
· green four wire connector for power IN and
OUT
April 2007
Page 10
CU0515
Service Diagnosis
SYMPTOM
POSSIBLE CAUSE
SUGGESTED CORRECTION
Unit will not run
Blown fuse
Replace fuse & check for cause of blown fuse.
Main switch in OFF position
Turn switch to ON position
Bin thermostat set improperly
Adjust rotating its setting screw
Loose electrical connections
Check wiring
Red Alarm light ON
Too Hi Condensing
Temperature
Reset the machine (Push & hold the Reset
Button for 5 seconds) and check for reason why
Red Alarm light Blinking
Twice
Condenser sensor out of order
Replace it and repeat
Cubes too small
Cube size control set improperly
Check and adjust for proper operation.
Capillary tube partially restricted
Recover charge, add new gas & drier, after
evacuating system with vacuum pump.
Shortage of water
See remedies for shortage of water.
Shortage of water
See remedies for shortage of water.
Dirty water supply
Use water softener or water filter.
Accumulated impurities
Use SCOTSMAN Ice Machine scale remover.
Some jets plugged
Remove jet cover and clean.
Shortage of water
See shortage of water.
Unit not leveled
Level as required.
Poor pumping
Check and/or replace the water pump.
Cubes too large
Cube size control set improperly
Check and adjust for proper operation.
Decreased ice capacity
Inefficient compressor
Replace.
Leaky water valve
Repair or replace.
Non-condensable gas in system
Purge the system.
Poor air circulation or excessive
hot location
Relocate the unit or provide for more ventilation.
Overcharge of refrigerant
Correct the charge.
Capillary tube partially restricted
Recover charge, add new gas & drier, after
evacuating system with vacuum pump.
Undercharge of refrigerant
Charge to data plate indication.
Discharge head pressure too
high
See incorrect discharge pressure.
Clogged air filter
Clean or replace.
Water spilling out through
curtain
Check or replace curtain.
Water solenoid valve not
opening
Replace valve.
Water leak in sump area
Locate and repair.
Water flow control plugged
Remove and clean.
Cloudy cubes
Irregular cubes size & some
cloudy
Shortage of water.
April 2007
Page 11
CU0515
Maintenance And Cleaning Instructions
GENERAL
Clean - Replace Of Air Condenser Filter
The periods and the procedures for maintenance
and cleaning are given as guides and are not to be
construed as absolute or invariable. Cleaning,
especially, will vary depending upon local water
and ambient conditions and the ice volume
produced; and, each ice machine must be
maintained individually, in accordance with its
particular location requirements.
1. Withdraw the air filter from the front through the
opening of the front panel.
Ice Machine
The following maintenance should be scheduled at
least two times per year on these ice machines.
1. Check and/or replace the water filter (if used).
2. Check that the ice machine is leveled in side to
side and in front to rear directions.
3. Check for water leaks and tighten drain line
connections. Pour water down bin drain line to be
sure that drain line is open and clear.
2. Remove the front panel.
3. Blow pressurized air on the opposite direction of
the condenser air flow so to remove the
dust accumulated. If pressurized air is not
available, use tap water always in the counter flow
air direction. Once cleaned shake it so to remove
most of the accumulated water, then dry it using an
hair dryer.
NOTE. In case the air filter strainer is damaged
replace it with a new one.
4. Return the front panel to its normal position.
5. Install filter by pushing it through the front panel
opening.
4. Check size, condition and texture of ice cubes.
Perform adjustment of cube size control as
required.
5. Check the bin thermostat to test shut-off.
Put a scoop full of ice cubes in contact with the bin
thermostat bulb for at least one minute.
This should cause the ice maker to shut off. Within
few seconds after the removal of the ice from bin
thermostat bulb, the ice machine restarts.
NOTE. Within minutes after the ice is removed
from the bulb holder tube, the sensing bulb inside
the tube will warm up and cause the ice machine
to restart. This control is factory set and should not
be reset until testing is performed.
6. Check for refrigerant leaks.
NOTE. Standard equipped with an air condenser
filter as well as a Cleaning Reminder Board to
remind to the end user the need for the cleaning of
the air filter or of the water system (Red Alarm
Light ON Steady or Blinking respectively with
machine in operation).
April 2007
Page 12
CU0515
Cleaning Water System
1. Remove the ice from the bin.
2. Remove the air filter and then the front panel.
3. Rotate control knob counter clockwise to the Off
position.
4. Turn off the water supply to the ice machine.
5. Remove top panel.
6. Remove plastic panel (evaporator cover) that
covers evaporator section.
7. Remove clamp and drain cap from the bottom of
the reservoir, allow all the water to drain out.
Pour Scale Remover Over The Evaporator
Section
12. Operate the machine with the cleaning toggle
switch in the Operation position for 5 minutes.
13. Switch the cleaning toggle switch to the
Cleaning position and operate the machine for 1
minute.
14. Repeat steps 12 and 13 three times. After the
third time rotate the control knob counter clockwise
to the Off position.
Remove Drain Cap
8. Return the drain cap and clamp to their original
positions.
9. Mix approximately 3 ounces (1/10 liter) of
Scotsman Clear 1 Scale Remover with 1.5 quarts
(1.5 liter) of warm (95-115oF.) potable water, and
pour this solution over the evaporator section
(bright metal tubing and inverted cups in white
plastic tray at the top of the ice machine).
Ice machine cleaner
contains acids. Acids can
cause burns.
If concentrated cleaner comes
in contact with skin, flush with
water. If swallowed, do NOT
induce vomiting. Give large
amounts of water or milk. Call
Physician immediately. Keep
out of the reach of children.
10. Return the evaporator cover removed in step 6
to its normal position.
11. Rotate the control knob to the Normal position.
15. Remove evaporator cover. Pour hot water over
the entire surface of the evaporator section. Return
evaporator cover to its original position.
16. Pour hot water into the bin to melt any ice
produced during cleaning, and to clean out the
drain. Wipe the interior of the bin with mild soap
and hot water, rinse with cold water.
To sanitize, mix a locally approved sanitizer
solution and perform steps 17-31. A possible
sanitizer solution may be obtained by mixing 1
ounce of household bleach with 2 gallons of warm
(95-115oF) water.
17. Remove plastic panel (evaporator cover) that
covers evaporator section.
18. Remove clamp and drain cap from the bottom
of the reservoir, allow all the water to drain out.
19. Return the drain cap and clamp to their original
positions.
20. Pour sanitizer solution over the evaporator
section (bright metal tubing and inverted cups in
white plastic tray at the top of the ice machine).
21. Spray or wash the bottom of the evaporator
cover and the edges of the evaporator section with
the sanitizing solution.
April 2007
Page 13
CU0515
22. Return the evaporator cover removed in step
17 to its normal position.
23. Rotate the control knob to the Normal position.
29. Thoroughly spray or wipe the interior of the ice
storage bin, bottom of the evaporator cover and
the spray platform with the sanitizing solution.
24. Operate the machine with the cleaning toggle
switch in the Operation position for 4 minutes.
30. Completely immerse the curtain in the
sanitizing solution.
25. Switch the cleaning toggle switch to the
Cleaning position and operate the machine for 1
minute.
31. Return the evaporator cover and curtain to
their original positions.
26. Repeat steps 23 and 24 five times. After the
fifth time rotate the control knob counter clockwise
to the Off position.
33. Rotate control knob to its original position.
Switch the cleaning toggle switch to the Cleaning
position for two minutes and then switch it to the
Operation position. Operate the machine until one
batch of ice has been released into the bin. Pour
warm water over the ice to melt it.
32. Reconnect water supply.
27. Remove evaporator cover. Pour sanitizer
solution over the entire surface of the evaporator
section and wash or spray the evaporator cover
bottom with sanitizer. Return evaporator cover to
its original position.
34. Return the front panel to its original position
and secure with the original screws.
28. Remove curtain, remove clamp and drain cap
from the bottom of the reservoir, allow all the water
to drain out. Return the drain cap and clamp to
their original positions.
Remove Thumb Screw Holding Curtain
Remove Curtain
April 2007
Page 14
SCOTSMAN ICE SYSTEMS
775 Corporate Woods Parkway, Vernon Hills, IL 60061
800-533-6006
www.scotsman-ice.com
17-3169-01