Scotsman CME1656 SERVICE MANUAL
INTRODUCTION
CME1356 and CME1656
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.
There are 2 models covered in this manual:
• CME1356, having 5 evaporators
• CME1656, having 6 evaporators
TABLE OF CONTENTS
Specifications .................PAGE2
Air Cooled Layout ...............PAGE3
Water Cooled Layout .............PAGE4
Pre-Installation .................PAGE5
Location & Assembly .............PAGE6
Stacking ....................PAGE7
Be certain that the information applies to the model
in question. If no model is listed, the information
applies to all models.
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.
Technicians Only: Harvest Cycle Operational
Sequence ...................PAGE23
Sanitation and Cleaning ............PAGE24
Additional Maintenance ............PAGE25
Additional Maintenance: Water Distributors . . PAGE 26
Additional Maintenance: Inlet Water Valve
Screen .....................PAGE27
Stacking ....................PAGE8
Bin Control: Installation ............PAGE9
Bin Control ...................PAGE10
Plumbing ....................PAGE11
Electrical ....................PAGE12
After Utility Connections ............PAGE13
Component Description and Function .....PAGE14
System Controller ...............PAGE15
Initial Start Up .................PAGE16
Adjustments ..................PAGE17
Adjustments ..................PAGE18
How To Operate The System Controller . . . PAGE 19
How The Electronic Cuber Works .......PAGE20
Additional Maintenance: Ice Sensors, Condenser
........................PAGE28
Service Diagnosis: Controller Diagnostic Light
Analysis ....................PAGE29
Service Diagnosis ...............PAGE30
Service Diagnosis: Components .......PAGE31
PTCR .....................PAGE32
Operational Characteristics: CME1356 ....PAGE33
Operational Characteristics: CME1656 ....PAGE34
Removal and Replacement ..........PAGE36
Removal and Replacement: System Controller PAGE 37
Removal and Replacement: Water Level Sensor
........................PAGE37
Removal and Replacement: Fan Blade and/or Fan
Motor .....................PAGE38
How The Electronic Cuber Works .......PAGE21
Technicians Only: Freeze Cycle Operational
Sequence ...................PAGE22
Parts Lists and Wiring Diagrams are Located in the Center of this Manual
May 2000
Page 1
Access Valves .................PAGE39
Liquid Charging ................PAGE40
Before Calling for Service ...........PAGE41
CME1356 and CME1656
Specifications
These ice machines are designed to be installed
indoors, in a controlled environment. They can
operate satisfactorily under a wide variety of
conditions. 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.
Operational Limits
Minimum Maximum
Air Temperature 50
Water Temperature 40
Water Pressure 20 psi 80 psi
Voltage (60 Hz model) 198 253
Voltage (50 Hz model) 207 253
Inlet water flow required is 2.7 GPM.
A stacking kit, for
like models, is KSCME6-LG-B
o
F. 100oF.
o
F. 100oF.
Voltage note: The control system transformer in
the control box of this ice machine has two primary
taps, one for 208 volt power and one for 240 volt
power. The machine ships with the power supply
connected to the 208 volt tap. Change to the 240
volt tap when the voltage supplied to the unit is
greater than 229 volts
All models will fit a standard, 48" wide Scotsman
Ice Storage Bin. Some examples are BH900,
BH1100, BH1300, BH1600. There may be other
bins that can be used, check Scotsman’s sales
literature for application information. Slope front
bins must have an internal baffle like the BH900.
Baffle must be approximately in the position shown
in the diagram on page 5.
Scotsman reserves the right to make design
changes and/or improvements at any time.
Specifications and designs are subject to change
without notice.
Dateplates on the ice machine contain charge and
electrical requirements. Always go by the dataplate
information. The table below is for reference.
Basic Information
Model Number
CME1356AS-32 A thru E 48 ½ x 24 x 28 208-230/60/1 Air Cooled 26.7 30 64 ounces
CME1356WS-32 A thru E same 208-230/60/1 Water Cooled 23.9 30 62 ounces
CME1356WS-32 F same 208-230/60/1 Water Cooled 23.9 30 58 ounces
CME1356AS-3 A thru E same 208-230/60/3 Air Cooled 17.8 20 64 ounces
CME1356WS-3 A thru E same 208-230/60/3 Water Cooled 14.9 20 62 ounces
CME1356WS-3 F same 208-230/60/3 Water Cooled 14.9 20 58 ounces
CME1356AS-6 A thru E same 230/50/1 Air Cooled 26.7 30 64 ounces
CME1356WS-6 A thru E same 230/50/1 Water Cooled 23.9 30 62 ounces
CME1356WS-6 F same 230/50/1 Water Cooled 23.9 30 58 ounces
CME1656AS-32 A thru D same 208-230/60/1 Air Cooled 26.7 30 64 ounces
CME1656WS-32 A thru E same 208-230/60/1 Water Cooled 23.9 30 62 ounces
CME1656WS-32 F same 208-230/60/1 Water Cooled 23.9 30 58 ounces
CME1656AS-3 A thru E same 208-230/60/3 Air Cooled 17.8 20 64 ounces
CME1656WS-3 A thru E same 208-230/60/3 Water Cooled 14.9 20 62 ounces
CME1656WS-3 F same 208-230/60/3 Water Cooled 14.9 20 58 ounces
Model
Series
Dimensions
W" x D" x H"
(w/o bin)
Basic
Electrical
Condenser
Type
Minimum
Circuit
Ampacity
Maximum
Fuse
Size
Refrigerant
Charge
(R-404A)
CME1656AS-6 A thru E same 230/50/1 Air Cooled 26.7 30 64 ounces
CME1656WS-6 A thru E same 230/50/1 Water Cooled 23.9 30 62 ounces
CME1656WS-6 F same 230/50/1 Water Cooled 23.9 30 58 ounces
November 2004
Page 2
Air Cooled Layout
CME1356 and CME1656
26.10 in
66.3 cm
MINIMUM BIN
TOP OPENING
6.00 in
15.2 cm
MINIMUM FOR
UTILITY CONNECTIONS
6.00 in
15.2 cm
MINIMUM FOR
AIR VENTILATION
PLAN VIEW
CONDENSER FINS
4.20 in
10.7 cm
ICE
OPENING
.88 DIA. KNOCKOUT
ELECTRICAL INLET
10.15 in
25.8 cm
2.50 in
6.4 cm
AIR VENTILATION
WATER INLET
3/8" FLARE
18.75 in
47.6 cm
3.81 in
9.7 cm
6.00 in
15.2 cm
MINIMUM FOR
ICE
OPENING
BACK VIEW
DUMP
VALVE
DRAIN
3/4" F.P.T.
23.87 in
60.6 cm
12.30 in
31.2 cm
5.87 in
14.9 cm
1.96 in
5.0 cm
2.82 in
7.2 cm
May 2000
Page 3
CME1356 and CME1656
Water Cooled Layout
26.10 in
66.3 cm
MINIMUM BIN
TOP OPENING
6.00 in
15.2 cm
MINIMUM FOR
UTILITY CONNECTIONS
6.00 in
15.2 cm
MINIMUM FOR
AIR VENTILATION
INLET WATER
3/8" FLARE
PLAN VIEW
4.20 in
10.7 cm
ICE
OPENING
CONDENSER INLET
3/8" F.P.T.
.88 DIA. KNOCKOUT
ELECTRICAL INLET
10.15 in
25.8 cm
2.50 in
6.4 cm
18.75 in
47.6 cm
3.81 in
9.7 cm
CONDENSER DRAIN
1/2" F.P.T.
ICE
OPENING
23.30 in
59.2 cm
BACK VIEW
DUMP
VALVE
DRAIN
3/4" F.P.T.
5.96 in
15.1 cm
May 2000
Page 4
18.67 in
47.4 cm
5.87 in
14.9 cm
3.58 in
9.1 cm
21.87 in
55.5 cm
11.87 in
30.1 cm
2.46 in
6.2 cm
23.87 in
60.6 cm
Pre-Installation
Other Applications:
Check Scotsman sales information for
recommendations regarding applications.
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, near the purge valve..
Water:
There is no such thing as pure water. All water
contains some impurities. There are two ways
water carries the impurities: suspended and
dissolved. Suspended solids can be filtered out.
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.
CME1356 and CME1656
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.
Service Technicians: All models covered here
come set from the factory at a “standard” water
rinse, which is compatible with typical water
conditions. They may be adjusted to “Minimum" or
“Maximum" water rinse after start up. 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.
Serial Number Plate
Note: Slope front bins must have an internal baffle.
Scotsman’s BH900 has the required baffle. Baffle
must be approximately in the position shown in the
diagram.
Baffle
12.0"
May 2000
Page 5
4.0"
Side View
CME1356 and CME1656
Location & Assembly
The air cooled models take room temperature air
in from the left side and the front and discharge
warm air out the back.
A 6 inch minimum clearance on the back, and
both sides is required for the proper operation and
service of the air cooled model.
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.
Cabinet Panel Removal:
Note: The top panel holds the upper edges of the
side panels in place.
1. Remove the front panel by removing the two
screws connecting the front panel to the machine.
2. Lift up at the front edge and push the top panel
back until it releases from the tabs connecting it to
the back panel.
3. Remove the screws at the front edge of the left
side panel, and pull forward until it releases from
the tabs connecting it to the back panel.
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.
Level the top edge of the bin front to back and
left to right.
If the ice machine has not been unpacked, do so
now. Remove the carton from the skid. After
removal of the shipping straps, lift the ice machine
off the skid directly onto the bin.
Note: The machine is heavy! Use a mechanical
hoist if necessary.
Secure the ice machine to the bin with the
hardware provided (two metal straps and 4 bolts).
Locate the Bin Thermostat Bracket and hardware.
Retain for later use.
Aiir cooled: Remove baffle from its shipping
position and secure to the back of the cabinet.
Follow the directions on the baffle for proper
installation.
August 2003
Page 6
Stacking - Kit KSCME6-LG-B
CME1356 and CME1656
Only like models may be stacked. Begin after the
bottom unit has been placed on the ice storage
bin and secured. Stacking requires heavy duty leg
kits. Casters are NOT recommended.
Note: Instructions are for either model.
Bottom Machine:
1. Remove front panel, left side panel, and top
panel.
2. Remove & discard top cover from over the
freezing compartment.
3. Install gasket materials to freezing compartment:
Cut about 22" of gasket material from the roll in
the kit. Apply it to the back side top edge of the
freezing compartment.
Cut two lengths of gasket material to fit the right
side top edge of the freezing compartment and
apply them.
4. Place a bead of food grade sealant to the top of
the back wall’s gasket.
5. Place the shield bracket (has a large hole in the
center) from the kit over the center of the freezing
compartment.
Insert the tabs of the bracket into slots on the
back of the unit.
6. Secure bracket at the front with screws from the
kit.
7. Hang the plastic shields from the bracket
installed in the prior step. Use the slots in the
shields to hang them from the stainless steel
hooks.
Note: The notch in the bottom of the shield goes
to the front.
11. Remove two existing screws and secure the
bracket to the: freezing compartment, back panel
and front channel with the 2 existing screws and 1
large and 4 small screws from the kit.
Both Machines:
12. Place the top ice machine onto the bottom one.
Secure together with hardware from the top
machine. Remove left front and left side panels.
13. At the back of the ice machines, on the
compressor end, remove the upper knock-out from
the bottom machine and the lower knock out from
the upper machine.
14. Place a strain relief (from the kit) into each hole.
15. Insert wire harness from kit thru strain-relief
and hole in upper corner of the lower ice machine’s
back panel.
NOTE: Harness is marked which end goes to
which machine.
Bottom Machine:
16. Remove harness from controller terminal 7 and
bin thermostat.
17. Route wire harness in lower ice machine to the
controller. Connect to terminal #7. Plug the two free
wires onto the thermostat terminals #1 and #2.
18. Return left side panel to its original position on
the lower ice machine.
Top Machine:
19. Remove harness from controller terminal 7.
20. Route wire harness thru upper unit’s lower
knock-out hole and strain relief and continue
internally to the controller. Plug wire onto terminal 7
of the controller.
Note: The tabs on the shields must fit inside the
ice outlet port.
8. Check the position of the shields. They must
move freely and be vertical.
Note: The suction line may need to be moved
slightly so the tubing clears the bracket & shields.
9. Place a bead of food grade sealant onto the top
left edge of the freezing compartment.
10. Install the front-to-back support bracket over
the left edge of the freezing compartment.
May 2001
21. Return all panels and covers to their normal
positions.
22. Complete the balance of the installation.
Service Notes:
A. The shields must be positioned so they hang
vertically and move freely left to right. Their
purpose is to guide the ice past the bottom
machine’s evaporators and into its cube port.
B. The drain lines from each ice machine must be
kept separate.
Page 7
CME1356 and CME1656
Stacking
Upper Unit
Gasket on
Plastic Wall of
Lower Unit
Gasket for Metal
Edges of Bottom
Unit
Mounting
Straps and
Hardware
Front-to-Back
Bracket
Shield Hanger
Bracket
Shield
May 2001
Page 8
Bin Control: Installation
CME1356 and CME1656
The bin control is a thermostat. It must be field
installed after the ice machine has been placed on
the bin.
Before starting, remove the left front panel and any
baffle in the bin.
1. Locate bin thermostat bulb.
2. Route bulb thru routing tube (located between
the compressor and the reservoir).
3. Locate bin thermostat bracket.
4. Carefully position the thermostat bulb on the
bracket (see the diagram on the next page).
5. Fasten the bracket to the bottom of the ice
machine with the two 3-pronged knobs supplied
with the unit.
6. Pull back into the ice machine any excess
capillary tubing.
7. Return the baffle to the bin and continue with
the installation.
Note: If the machine is located at an altitude higher
than 2,000 ft., adjust the thermostat by removing
the plastic cover and rotating the adjustment screw
per the table.
Bin Thermostat Altitude Correction Table
CW Turns of Range Screw (under plastic cover)
Feet Turns Feet Turns
2000 55
4000 160
6000 250
o
o
o
8000 340
9000 385
10000 405
o
o
o
Use This Table to Adjust Thermostat
Bin
Thermostat
Body
Bin Thermostat Bulb
Thermostat
Bulb
Routing
Tube
Route Bin Thermostat Bulb Into Bin
May 2000
Page 9
CME1356 and CME1656
Bin Control
Bin Thermostat
Bracket
Insert Bulb
Tip Here
Bin Thermostat
Capillary Tube
Mount Thermostat
Capillary Tube Here
Attach Thermostat Bulb to Bracket
Minimize Excess
Tube in Bin
Three-Pronged
Knob
Thermostat and
Bracket
Attach Bracket to Bottom of Ice Machine
May 2000
Page 10
Plumbing
CME1356 and CME1656
All models require an adequate potable water
supply and a gravity drain. The recommendations
for tubing are:
• Water supply to be
• Drain to be
3
⁄4" OD.
3
⁄8" OD.
Note: When replacing a prior ice machine, do not
take a short cut and reuse the old inlet and drain
system. INSTALL A NEW SYSTEM.
Supply:
Air cooled models have 1 water supply connection,
3
⁄8" male flare at the back of the cabinet. Connect
a
to cold potable water that has adequate pressure.
Note: Using water supply tubing smaller than3⁄8"
will cause severe operational issues.
Water cooled models have an additional " FPT
3
8
condenser inlet connection at the back of the
cabinet.
Water Filters:
The water filters must flow at least 2.7 GPM or they
will cause severe operational issues. Check with
the filter manufacturer. When replacing a prior ice
machine, do NOT assume that the water flow
capacity of the filter will be adequate.
All Drain Tubing Material must be RIGID.
Flexible tubing will eventually cause a restricted
drain.
Drain:
Air cooled models have 1 gravity drain connection,
3
⁄4" FPT fitting at the back of the cabinet. Use only
a
RIGID TUBING. Flexible tubing may be easily
kinked or become cracked.
The drain tube must be vented at the back of the
cabinet. Use an 18" high vent.
Water cooled models have an additional condenser
drain. It is a ½ “ FPT fitting 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.
The drain for the ice machine and the ice storage
bin must be SEPARATE or the ice machine’s drain
water may run into the bin and MELT THE ICE.
Insulation is recommended for the ice machine
reservoir and bin drains.
Follow all applicable codes
Potable
Water Inlet
Vent
Water Inlet
Drain
Bin Drain
Floor Drain
May 2000
Page 11
CME1356 and CME1656
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 the junction box.
Follow all Local, State and National codes.
Electrical
Power Supply
Condenser
Water
Supply
Junction Box
Condenser
Drain
Water Cooled Model Shown
May 2000
Page 12
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
properly made?
CME1356 and CME1656
___ 5. Have all the drain connections been properly
made?
___ 6. Has the unit been leveled?
___ 7. Have all unpacking materials been removed?
___ 8. Has the bin control been installed?
___ 9. Is the water pressure adequate?
___ 10. Have the drain connections been checked
for leaks?
___ 11. Has the bin interior been wiped clean or
sanitized?
___ 12. Have any water filter cartridges been
replaced?
May 2000
Page 13
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