This product manual contains the information
needed for the setup, installation, initial start up,
sanitation and maintenance of this ice machine.
Keep it for future reference.
All series of these 4 models are covered in this
manual:
CME256, a 115 volt, single evaporator
•
machine
CME506, a 115 volt, dual evaporator
•
machine (115 volt if 60 Hz, 230 volt if 50 Hz)
CME656 and CME806, 230 volt, dual
•
evaporator machines
Table of Contents
Specifications:................ page 2
Pre-Installation ................ page 3
Location & Assembly: ............. page 4
Stacking: ................... page 5
Plumbing: ................... page 6
Electrical: ................... page 7
After Utility Connections: ........... page 8
Component Location and Function: ...... page 9
AutoIQ Controller: ............... page 10
Initial Start Up: ................ page 11
Adjustments: ................. page 12
Adjustments: ................. page 13
How To Operate The AutoIQ Controller . . . page 14
Be certain that the information applies to the model
in question. If no model is listed, the information
applies to all models, including A through F series.
This manual is organized in the same way as the
expected use of the machine, it begins with
specifications, goes thru unpacking and setup,
shows where everything is; continues with initial
start up, then describes how it works. After that is
the sanitation section, followed by service
diagnosis and repair.
Additional Maintenance: Water Distributors. page 20
Additional Maintenance: Inlet Water Valve Screen
......................... page 21
Additional Maintenance: Bin Controls, Condenser
......................... page 22
Service Diagnosis: Controller Diagnostic Light Analysis
Printed on Recycled Paper.Parts lists are in the center section.
CME256, 506, 656, 806: AutoIQ™ Cubers
Specifications:
These ice machines are designed to be installed
indoors, in a controlled environment. They can
operate satisfactorily under a wide variety of
conditions. However, Do NOT operate the
machine where it has not been designed for. Do
NOT operate the machine in temperatures it has
not been designed for. Do NOT operate the
machine above or below the voltage limits for the
particular model. Do NOT operate the machine
with too little or too much water pressure.
CME256 or CME506 Operational Limits
MinimumMaximum
Air Temperature50oF.100oF.
Water Temperature40oF.100oF.
Water Pressure20 psi80 psi
Voltage (115 volt model)103126
Voltage (208-230 volt mdl)198253
Voltage (230 volt model)207253
CME656 or CME806 Operational Limits
MinimumMaximum
Air Temperature50oF.100oF.
Water Temperature40oF.100oF.
Water Pressure20 psi80 psi
Voltage (60 Hz model)198253
Voltage (50 Hz model)207253
All models will fit a standard, 30" wide Scotsman
Ice Storage Bin. Some examples are:
BH550; HTB555; HTB350; HTB250
•
The CME256 and CME506 are the typical models
used in hotel applications and they fit the
Scotsman HD30 dispenser without an adapter. All
models fit the ID200 or ID250 dispensers which
require a KBT44 adapter. Check Scotsman’s sales
literature for other application information.
Note: These machines fill the bin very full, up to
the base of the ice machine. Bin Model BH800
may need kit KBaffle2 and Bin Model BH550 may
need kit KBaffle1. In some cases the ice level in
the bin may be too high for a customer's needs. A
thermostat kit is available to lower the ice level, its
part number is A37749-001.
A stacking kit, for like models
,isKSCME6-30.
Scotsman reserves the right to make design
changes and/or improvements at any time.
Specifications and designs are subject to change
without notice.
Scotsman assumes no liability or responsibility of
any kind for products manufactured by Scotsman
that have been altered in any way, including the
use of any parts and/or other components not
specifically approved by Scotsman.
BASIC INFORMATION
Current Model
Number
CME256AS-1F30 x 24 x 27115/60/1Air Cooled1620
CME256WS-1Fsame115/60/1Water Cooled1620
Models CME256 or CME506 may be placed on
certain Ice Dispensers, including Scotsman
models: HD30, ID200 and ID250.
Check with other dispenser manufacturers for
recommendations regarding application.
Check the nameplate for electrical requirements.
The nameplate is located on the back of the ice
machine. While the model and serial number are
on the nameplate, a serial number plate is located
at the front of the machine, below the metal control
box.
Water:
There is no such thing as pure water. There are
two ways water can contain impurities: in
suspension or in solution. Suspended solids can
be filtered out. In solution or dissolved solids must
be diluted or treated. Water filters are
recommended to remove suspended solids. Some
filters have treatment in them for suspended
solids. Check with a water treatment service for a
recommendation.
Location of Nameplate
(on the back, plus a serial plate
is behind the front panel)
Nameplate
Cube Ice machines use more water than what
ends up in the bin as ice. While most water is used
during ice making, a portion is designed to “rinse”
out the water system to keep hard water scale
from clogging up the machine. That water rinse,
combined with water filters, prolongs the times
between needed water system cleaning.
Note: All Scotsman CM3models, like those
described in this manual, feature Scotsman’s
AutoIQ™ control system and ReliaClean™ water
system cleaning process.
Service Technicians
factory at a “standard” water rinse, which is
compatible with typical water conditions. The
ReliaClean™ water system provides an
adjustment method so to the amount of water
rinsed per cycle can be changed. If the prior ice
machine worked acceptably well with the local
water conditions, leave the machine at the factory
setting. If severe water conditions are present, and
water filters do not solve the problem acceptably,
adjust the machine to use more water. If water
conditions are excellent, adjust the machine to use
less water. See the Adjustments section.
Note: Water use adjustments are customer
convenience adjustments; they are NOT factory
defects and are NOT covered by warranty.
: All models are set by the
July 2004
Page 3
Back View Diagram (air cooled)
Top View Diagram
Note: Although the machine will function, ice capacity of
air cooled machines will be significantly reduced with
only 6 inches of clearance at the sides, back and top.
CME256, 506, 656, 806: AutoIQ™ Cubers
Location & Assembly:
Air cooled models take room temperature air in
from the left and right sides, and discharge warm
air out the back. If installed in a corner or with
another cabinet next to the right side, an air baffle
could be installed on the back of the cabinet to
minimize air re-circulation.
A 6 inch minimum clearance on the back, left and
right sides is required for operation and service of
this machine.
Air Flows in the Sides
and Out the Back
Cabinet Panel Removal:
Note: The top panel holds the upper edges of the
side panels in place.
1. Front Panel, “A” series: Remove the front
panel by removing the four screws connecting the
front panel to the left and right sides.
Remove
Second
Note: Although the machine will function, ice
capacity of air cooled machines will be
significantly reduced with only 6 inches of
clearance at the sides, back and top.
Unpacking and Assembly:
Begin with unpacking the ice storage bin. Remove
the carton, and using part of the carton as a
cushion, tip the bin on its back to remove the skid
and attach the legs or casters. Note: Stacked
applications may not use casters.
Return the bin to an upright position. Check the bin
top gasket for gaps and tears, fill any in with food
grade sealant prior to placing the ice machine on
the bin.
If the ice machine has not been unpacked, do so
now. Remove the carton from the skid. Lift the ice
machine off the skid directly onto the bin.
Note: The machine is heavy! Use a mechanical
hoist if necessary.
Remove
First
Removal of Panels
Front Panel “C thru F” Series: Remove top two
screws, and pull the bottom of the panel away
from the machine to unsnap it from the machine.
2. Remove 2 screws at the front edge of the top
panel, and pull the top panel forward until it
releases from the tabs connecting it to the back
panel.
3. Remove the screws at the front edge of each
side panel, and pull them forward until they
release from the tabs connecting them to the back
panel.
Secure the ice machine to the bin with the
hardware provided (two metal straps and 4 bolts).
July 2004
Page 4
CME256, 506, 656, 806: AutoIQ™ Cubers
Stacking:
Models CME256, CME506, CME656 and CME806
may be stacked together in any combination. Use
kit number KSCME6-30:
1. Remove the front, left side and top panels from
the bottom machine. Discard the top panel.
2. Remove the front and left side panels from
the top machine.
3. Place the upper machine onto the lower
machine. Check that the tabs on the top of the
freezing compartment in the lower machine
engage the slot in the base of the upper
machine (around the cube port).
4. Fasten the upper cabinet to the lower
cabinet with the hardware (two metal straps
and four bolts) provided with the machine.
5. Knock out 1 hole in the upper left (viewed
from the front) corner of the lower unit’s back
panel. Knock out the hole in the lower left
(viewed from the front) corner of the upper
unit’s back panel.
Mounting Strap,
Machine to
Machine
6. Position the strain reliefs over the wrapped
portion of the stacking kit wire harness.
Route the Stacking Kit Wire Harness from the
back to the top and bottom machines thru the
holes made in step 5. The harness is markedwhich end goes to which machine. Push the
strain reliefs into place from the back of the
machines.
Follow local electrical codes for 24 volt wire.
In the lower unit, route the wire behind the
suction line and thru the snap bushing just
below the Controller. Tape any excess wire to
the insulated suction line.
In the upper unit, route the harness thru the
snap bushing just below the System Controller.
Plug one end into each Controller connection
number 7.
7. Place insulation pad from the kit over the
reservoir drain tubing in the upper machine.
Make certain that the insulation is in contact
with the tubing.
Mounting Strap,
Machine to Bin
Wire Harness from
Stacking Kit
8. Return all panels to their normal places.
Stacking Like Models
January 2002
Page 5
CME256, 506, 656, 806: AutoIQ™ Cubers
Plumbing:
All models require an adequate potable water
supply and a gravity drain. The recommendations
for tubing are: Water supply to be
3
“ OD. Drain to
8
be ¾ “ OD.
Supply:
Air cooled models have 1 water supply connection,
3
a
“ male flare at the back of the cabinet. Water
8
cooled models have an additional
condenser inlet connection at the back of the
cabinet.
Potable Water
Inlet
Condenser
Water Inlet
3
” FPT
8
Water Cooled
Plumbing
Connections
Drain:
Air cooled models have 1 gravity drain connection,
a ¾ “ FPT fitting at the back of the cabinet.
It must be vented at the back of the cabinet.
Water cooled models have an additional
condenser drain, it isa½“FPTfitting at the back
of the cabinet. Do not vent this drain.
The ice storage bin will have a drain out the back
or base, depending upon the model. Note:
Scotsman HTB555 (shown in this manual) may be
drained either out the back or the base.
Condenser
Drain
Potable
Water Inlet
Optional
Filter
Reservoir
Drain, Must
Be Vented
Separate
Drains for
Bin and
Machine
Plumbing
Connections
January 2002
HTB555
Drains
Insulation is recommended for the ice machine
reservoir and bin drains.
Follow all applicable codes
Page 6
CME256, 506, 656, 806: AutoIQ™ Cubers
Electrical:
All models must be installed with the correct wire
size and type per the National Electric Code.
Locate the nameplate on the back of the cabinet
and find the numbers for Voltage, Phase, Minimum
Circuit Ampacity and Maximum Fuse Size. Either
fuses or HACR type circuit breakers may be used.
Electrical connections are made in the junction box
in the back of the cabinet.
1. Remove the junction box cover.
2. Knock out 1 hole for a field supplied strain relief.
3. Install wires and strain relief per code.
4. Connect to wires and secure ground wire to
ground screw inside junction box.
Follow all Local, State and National codes.
Junction Box
Electrical Access
Electrical Connection
January 2002
Page 7
CME256, 506, 656, 806: AutoIQ™ Cubers
After Utility Connections:
1. Level the cabinet, use the leg levelers on the
end of the legs to adjust the cabinet height.
2. Wash out the bin. If desired, the interior of the
bin could be sanitized.
3. Locate the ice scoop (if supplied) and have it
available for use when needed.
Final Check List:
1. Is the unit located indoors in a controlled
environment?
2. Is the unit located where it can receive
adequate cooling air?
3. Has the correct electrical power been supplied
to the machine?
4. Have all the water supply connections been
made?
5. Have all the drain connections been made?
6. Has the unit been leveled? The unit must be
leveled at the water reservoir.
7. Have all unpacking materials been removed?
8. Is the water pressure adequate?
9. Have the drain connections been checked for
leaks?
10. Has the bin interior been wiped clean or
sanitized?
11. Have any water filter cartridges been
replaced?
January 2002
Page 8
CME256, 506, 656, 806: AutoIQ™ Cubers
Component Location and Function:
Reservoir: Contains the water charge used for
every batch of ice.
Water Inlet Valve: Opens to allow water into the
reservoir.
Water Level Sensor: Controls the size of the ice
cube by measuring how much water is used in a
cycle. It consists of a float, stem and electric eye.
The stem will move slightly when the pump is on,
this is normal. As the machine makes ice the
reservoir water level will fall and the visible portion
of the stem will slide down thru the slot in the
sensor body.
AutoIQ Controller: Controls the complete
operation of the ice machine. Turns it on and off;
switches it between cycles; shows information via
indicator lights; and shuts the machine down if
there is a problem.
Evaporators/Freezing Compartment: Location of
the evaporators. Ice forms on the evaporators and
is released when warmed up during the harvest
cycle. The freezing compartment is fully insulated
for maximum efficiency.
Cube Deflector: The slots in the inclined deflector
let the water falling from the evaporators back into
the reservoir, but when ice falls during harvest, the
ice slides off into the bin.
Refrigeration Service Access Valves: Only to be
used by a certified technician. Allows access to the
refrigeration system for diagnostic information.
Water Pump: Forces the water from the reservoir
to the top of the evaporator(s). The motor is
separated from the reservoir water to minimize
contact with the water.
Compressor: The refrigerant vapor pump, it
forces the refrigerant to flow thru the refrigeration
system tubing.
Hot Gas Valve: Closed during freeze, it opens
during harvest to divert hot discharge refrigerant
gas into the inlet of the evaporators.
Condenser: Either air or water cooled, discharges
the heat produced in ice making.
Access Valves
AutoIQ
Controller
Compressor
Water Pump
Water Level
Sensor
Reservoir
Evaporators
Cube
Deflector
Inlet Water
Valve
January 2002
Page 9
Component Location
CME256, 506, 656, 806: AutoIQ™ Cubers
AutoIQ Controller:
Indicator Lights:
Bin Full: On when bin is full, goes on and
•
off as ice falls during a harvest cycle.
Freeze: On when the unit is in the Freeze
•
cycle, blinks when a freeze mode is pending.
Harvest: On when the unit is in the Harvest
•
cycle.
Clean: On when the unit is in the Clean
•
cycle, blinks when preparing for a clean
mode.
Off: On when the unit has been switched off,
•
blinks when the machine is preparing to shut
off.
Water Error: On when the controller has
•
identified a problem with the water system.
Refrigeration Error: On when the controller
•
has identified a problem with the
refrigeration system.
Low Voltage In/out
Water Valve
Hot Gas Valve
Contactor Coil
Cycle Definitions:
Freeze: The refrigeration system is
•
operating to remove heat from the
evaporators. The compressor, fan motor (if
air cooled) and water pump are ON.
Harvest: The refrigeration and water
•
systems are operating to harvest the ice
cubes. While the compressor is on for the
full cycle, the water pump will be off at the
beginning and inlet water valve will switch off
before the end.
Clean: The Inlet Water Valve opens to fill the
•
reservoir, The Water Pump starts. The Clean
indicator light is switched ON. A manually
initiated rinse flushes the system.
Air Cooled Fan Motor
89
Hi Voltage In/out
Water Pump
Stacking
Future Use
Reservoir & Discharge
Line Thermistors
Bin Control Sensor
Bin Control Sensor
Reservoir Water
Level Sensor
Factory Use
7
6
5
4
3
2
1
Push Button
Control Switches
Indicator Lights:
BIN FULL
FREEZE
HARVEST
CLEAN
OFF
Diagnostic Lights
WATER
REFRIGERATION
AutoIQ Controller: Wire Connections, Push Buttons, and Indicator Lights
January 2002
Page 10
Initial Start Up:
CME256, 506, 656, 806: AutoIQ™ Cubers
1. Remove the front panel.
2. Locate the AutoIQ Controller.
3. Switch on the electrical power. Note that the
indicator lights all flashed on briefly.
4. Open the water supply valve.
5. Push and release the Freeze cycle push button
(the Freeze indicator light will blink until the
compressor starts). The next several operations
are automatic.
Initial Start Sequence
The Freeze light is blinking.
•
The Hot Gas Solenoid valve is open.
•
The inlet water valve opens to fill the
•
reservoir. The inlet water valve will shut off
when the reservoir is full.
The water pump starts to pump water.
•
The inlet water valve opens again to refill the
•
reservoir.
After 30 seconds the compressor starts.
•
After 5 seconds the hot gas valve closes.
•
Freeze Cycle:
•
The Freeze indicator light will come on. The
machine will stay in a Freeze cycle for many
minutes. Slush may appear in the reservoir,
it is temporary and normal.
•
Under certain conditions, the pump may
stop for a few seconds. After that the inlet
water valve will refill the reservoir.
•
The fan motor (of air cooled models) will
begin to turn and soon warm air will be
forced out the back of the cabinet.
•
The freeze cycle will continue until the water
level in the reservoir drops to its factory set
point, then the Harvest Cycle will begin.
Harvest Cycle:
•
The Harvest indicator light will be ON,
•
The hot gas valve will open.
•
The water pump will stop. It will restart in
less than a minute.
•
The Inlet water valve will open. The machine
will fill the reservoir and overflow it for a
specified number of seconds then shut off.
The harvest cycle may still be in progress.
•
The Bin Full indicator light will go on and off
as ice falls from the evaporators.
6. Machines are shipped from the factory with the
purge level set to accommodate average water
conditions. See page 13 for purge adjustment
instructions.
24 hours of run time may be need to attain full ice
making capacity.
7. The machine’s correct
ice falling from the evaporator in vertical strips of 8
- 10 cubes; the top 2 cubes might fall individually.
8. After a few minutes the machine will return to a
freeze cycle.
9. Fill out the Customer Evaluation and Warranty
Registration. Send it to Scotsman.
10. Replace the front panel.
11. Inform the user of the location and telephone
number of the local service company. Also inform
the user of the required maintenance of the
machine.
cube size should result in
Notes On Operation:
1. The electric eyes signal the ice machine to shut
off whenever the bin becomes full. After the eyes
sense that there is ice between them, the ice
machine will shut off at the end of the next harvest
cycle. This last harvest cycle will be longer than
the rest.
2. After the bin has filled the ice machine will not
be able to restart for 4 minutes. However, if
needed, the Freeze button may be pushed and the
unit will restart.
For example: If ice is removed from the bin
immediately after the machine has filled up and
shut off, the machine will not restart for 4 minutes.
3. If the bin controls sense a bin full signal before
any water is used (float stem up), the machine will
shut off on bin full.
July 2004
Page 11
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