Scotsman CME1202 User manual

INTRODUCTION
To the owner or user: This service manual is
intended to provide you and the maintenance or
service technician with the information needed to
install, start up, clean, maintain and service this
ice system.
Table of Contents
FOR THE INSTALLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2
AIRFLOW ON AIR COOLED MODELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3
UTILITY CONNECTION LOCATIONS: Back Views . . . . . . . . . . . . . . . . . . . . . . . . page 4
FOR THE INSTALLER: Location & Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . page 5
FOR THE ELECTRICIAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 7
FOR THE PLUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 8
FINAL CHECK LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 9
INITIAL START UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 10
FREEZING CYCLE OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 13
HARVEST CYCLE - HOT GAS BYPASS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 14
COMPONENT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 15
CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 18
ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 20
SYSTEM SPECIFICATIONS: CME1202 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 22
SYSTEM SPECIFICATIONS: CME1402 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 23
SERVICE DIAGNOSIS: Electrical and/or Adjustments . . . . . . . . . . . . . . . . . . . . . . page 24
SERVICE DIAGNOSIS: Refrigeration and/or Mechanical . . . . . . . . . . . . . . . . . . . . . page 25
SERVICE DIAGNOSIS: Ice Level Control Circuit . . . . . . . . . . . . . . . . . . . . . . . . . page 26
REMOVAL AND REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 27
REFRIGERATION SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 29
R-404A INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 30
LIQUID CHARGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 31
Parts Lists and Wiring Diagrams are located in
the center of this manual, printed on yellow
paper.
This manual was printed on recycled paper.
Keep this manual for future reference.
Note this symbol when it appears in the
manual. It indicates a potential hazard.
CME1202 & CME1402
January 1995
Page 1

Model Number Dimensions
(w/o bin)
W" x D" x H"
Basic
Electrical Minimum Circuit
Ampacity*
Maximum
Fuse
Size+
Refrigerant
Charge
R-404A
Condenser
Type
CME1402AE-3A 48 x 243⁄8x 271⁄2208-230/60/3 15 20 64 oz. Air
CME1402WE-3A 48 x 243⁄8x 271⁄2208-230/60/3 13.5 20 62 oz. Water
CME1402AE-32A 48 x 243⁄8x 271⁄2208-230/60/1 22.3 30 64 oz. Air
CME1402WE-32A 48 x 243⁄8x 271⁄2208-230/60/1 20.9 30 62 oz. Water
CME1402AE-6A 48 x 243⁄8x 271⁄2230/50/1 64 oz. Air
CME1402WE-6A 48 x 243⁄8x 271⁄2230/50/1 62 oz. Water
CME1202AE-3A 48 x 243⁄8x 271⁄2208-230/60/3 13.8 20 64 oz Air
CME1202WE-3A 48 x 243⁄8x 271⁄2208-230/60/3 12.4 20 62 oz. Water
CME1202AE-32A 48 x 243⁄8x 271⁄2208-230/60/1 21.6 30 64 oz. Air
CME1202WE-32A 48 x 243⁄8x 271⁄2208-230/60/1 18.6 30 62 oz. Water
CME1202AE-6A 48 x 243⁄8x 271⁄2230/50/1 64 oz. Air
CME1202WE-6A 48 x 243⁄8x 271⁄2230/50/1 62 oz. Water
* Minimum Circuit Ampacity is used to determine wire size and type per the National Electric Code. If the
numbers listed above are not the same as the nameplate, go by the nameplate.
+ Or HACR circuit breakers.
This ice system is designed to be installed indoors, in a controlled environment.
FOR THE INSTALLER
These machines will fit Scotsman’s ice storage bin
(48" wide) BH900, and with adapters, Scotsman’s
ice storage bins BH1000 (with KBT21) or BH1360.
They will stack (with kits) onto the following ice
machines:
••CME1202 or CME1402 (use KSCMS48).
••CMS1202 or CMS1402 (use KSCMS48).
••MCM1462 (use KSMCM48 - includes legs)
The stacking kit includes gaskets and trim strip.
Heavy duty leg kits are recommended for stacking.
See sales support literature for additional kits that
may be required for certain installations.
The normal finish for the machine is enamel. An
optional stainless steel panel kit (SPKCMS48) can
be field installed. It contains a stainless steel top,
left side panel, an overlay right side panel, and
front panels.
Scotsman Ice Systems are designed and
manufactured with the highest regard for safety
and performance. They meet or exceed the
standards of U.L., N.S.F., and C.U.L.
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.
Scotsman reserves the right to make design
changes and/or improvements at any time.
Specifications and designs are subject to change
without notice.
CME1202 & CME1402
January 1995
Page 2

A Serial Number Plate
is Located Behind The
Front Panel
AIRFLOW ON AIR COOLED MODELS
AIR FLOWS IN THE FRONT AND OUT THE BACK
NAMEPLATE IS ON THE BACK PANEL
CME1202 & CME1402
January 1995
Page 3

UTILITY CONNECTION LOCATIONS: Back Views
CONDENSER INLET
1.0 CM 3/8 IN. FPT
8.91 IN
WATER INLET
3/8 IN MALE FLARE
Water Cooled
Air Cooled
CME1202 & CME1402
January 1995
Page 4

FOR THE INSTALLER: Location & Assembly
When alignment and leveling are completed,
tighten the bolts to secure the mounting straps.
Remove the front panels, and remove the
evaporator shipping brackets and hardware.
SHIPPING
BRACKETS
ICE MACHINE AND BIN ASSEMBLY
MINIMUM MAXIMUM
Air Temperature 500F. 1000F.
Water Temperature 400F. 1000F.
Water Pressure 20 psi 80 psi
OPERATIONAL LIMITATIONS
Location:
After uncrating and inspection, the unit is ready for
installation. It is important that the machine be
installed INDOORS in a location where it has
enough space around it to be accessible for
service. A minimum of 6" must be allowed at the
back for air circulation on air cooled models. Try to
avoid hot, dirty and crowded locations. Be sure
that the location for the machine is within the
environmental limitations.
Storage Bin:
Tip the storage bin on its back, using parts of the
carton to protect the exterior finish. Install the
casters, use a heavy duty leg kit if stacking two ice
machines on one bin.
1. Arrange for proper electric, water and drain.
See instructions for the plumber and for the
electrician.
2. Single ice machine on bin: Use legs packed with
the bin. After mounting the legs position the ice
storage bin in the selected location:
Two ice machines on a bin require a stacking kit
such as KSCMS48. Use heavy duty leg kit KLP6
when stacking onto the BH900.
Note: Allow enough space to the left and back to
service the machine. Do NOT push the bin into
position, instead, lift it there. Pushing a bin may
damage the legs and leg mounts.
Level the bin in both the front to rear and side to
side directions by adjusting the leg levelers.
Stacked units use non-adjustable legs, and must
be leveled with shims. Select a well ventilated
location for air cooled models.
Note: Air cooled models blow air from front to back.
3. Inspect the bin top mounting gasket which
should be flat, with no wrinkles, to provide a good
water seal when the cuber is installed on top of the
bin.
Ice Maker:
Install the modular cuber on top of the bin using
care to be sure a good seal is made between the
two cabinets. Use of a mechanical lift is
recommended. Align the holes in the bottom rear
of the cabinet to mate with the two mounting holes
on the top rear of the bin. Use bolts and straps
found on the back of the ice maker to secure the
ice machine to the bin.
CME1202 & CME1402
January 1995
Page 5

FOR THE INSTALLER: Location & Assembly
Stacking Instructions
A stacking kit, KSCMS48, is required to
interconnect the ice level controls, seal the
freezing compartments, and to retain the top
edges of the bottom unit’s front panels.
Follow the installation instructions of the stacking
kit, but in general:
Use heavy duty legs (kit KLP6).
When stacking two units, remove the top panel
and the evaporator cover from the lower icemaker.
(The top removed from the lower ice maker will no
longer have any function.)
A stainless steel bracket (from the kit) must be
attached to the top of the bottom machine before
the units are stacked.
Place strips of gasket material (from the stacking
kit) on the top edges of the bottom unit’s freezing
compartment.
Carefully lift the uncrated top unit onto the bottom
one and align the two cabinets. Use of a
mechanical lift is recommended for this step.
At the back of the two ice makers,
bolt the upper ice maker cabinet to
the lower ice maker cabinet using the
mounting straps and bolts from the
hardware package.
Add the relay box to interconnect the
two ice machine’s bin control circuits.
EVAPORATOR COVER
STACKING
STAINLESS STEEL PANEL
RETAINING BRACKET
CME1202 & CME1402
January 1995
Page 6

FOR THE ELECTRICIAN
SEE NAMEPLATE for current requirements to
determine wire size to be used for electrical
hookup. The cuber requires a solid chassis to
chassis earth ground wire. See Wiring Diagram.
Be certain the cuber is connected to its own
electrical circuit and individually fused. Voltage
variation should not exceed ten percent of the
nameplate rating, even under starting conditions.
Low voltages can cause erratic operation and
may be responsible for serious damage to the ice
maker.
FOLLOW ALL APPLICALBE CODES
Electrical connections are made at the rear of
the ice maker, inside the junction box.
All external wiring should conform to the
national, state and local electrical code
requirements. Usually an electrical permit and
services of a licensed electrician will be
required.
ELECTRICAL CONNECTIONS, WATER COOLED
ELECTRICAL CONNECTIONS, AIR COOLED
GROUND SCREW
DETAIL OF
JUNCTION BOX
JUNCTION
BOX
HAND
DISCONNECT
SWITCH
CME1202 & CME1402
January 1995
Page 7

FOR THE PLUMBER
FOLLOW ALL LOCAL CODES:
The recommended water supply line is a 3/8-inch
O.D. copper tubing with a minimum operating
pressure of 20 PSIG and a maximum of 80 PSIG.
Connect to cold water supply line with standard
plumbing fittings, with shut off valve installed in an
accessible place between the water supply and
the cuber. In some cases a plumber will be
required.
Water Limitations:
An ice machine is a food manufacturing plant, it
takes in a raw material, water, and turns it into a
food product, ice. The purity of the water is very
important in obtaining pure ice and in maximizing
product life. It is generally better to filter the water,
although there is no one filter that will cure all
water problems. A good filter combined with a
polyphosphate feeder gives about the best overall
performance.
Cold, potable water must be supplied to the water
inlet fitting.
CONNECTIONS:
All drains are gravity type and must have a
minimum of 1/4-inch fall per foot on horizontal
runs. The drains to be installed to conform with the
local plumbing code. Install a vertical open vent on
drain line high point to insure good draining. The
ideal drain receptacle is a trapped and vented floor
drain. Recommended bin drain is 3⁄4" rigid tubing
and should be routed separately. Insulation for
high humidity areas is recommended.
Water Cooled models require another inlet
connection and another drain for the condenser.
The drain must be separate from the bin drain.
Bin Drain: The bin drains from the bottom, and
needs no vent unless there is a long horizontal
run. Terminate drains above the drain receptacle
with the proper air gap per local code.
The ice machine sump drain fitting is 3/4" FPT.
There must be a vent at this connection for proper
sump drainage. Recommended drain tube is 3⁄4"
rigid tubing and should be routed separately.
Insulation for high humidity areas is
recommended.
WATER SUPPLY AND DRAIN CONNECTION
BIN
DRAIN
VENT
WATER COOLED
CONNECTIONS
SUMP DRAIN MUST
BE VENTED
HAND SHUT OFF
VALVE
AIR COOLED
CONNECTIONS
AIR GAP
BETWEEN DRAIN
LINES AND
BUILDING DRAIN
CONDENSER
INLET
CONDENSER
DRAIN
AIR GAP
BETWEEN
DRAIN LINES
AND
BUILDING
DRAIN
OPTIONAL
FILTER
POTABLE
WATER
SUPPLY 3/4" FPT
3/8" MALE
FLARE
CME1202 & CME1402
January 1995
Page 8

FINAL CHECK LIST
1. Is the cabinet in a room where ambient
temperatures are within the minimum and
maximum temperatures specified?
2. Is there at least six inches clearance at the left
and back sides of the cabinet for proper air
circulation? (Air Cooled models)
3. Has water supply pressure been checked to
insure a minimum of 20 PSIG and a maximum of
80 PSIG operating pressure?
4. Is the cabinet level?
5. Check that any shipping material has been
removed from inside the cabinet.
6. Check that the reservoir is properly secured to
the bottom of the evaporator plates.
7. Have all electrical, water and drain connections
been made?
8. Is the water supply line shut off valve installed
and electrical wiring properly connected?
9. Check all refrigerant lines and conduit lines, to
guard against vibration or rubbing and possible
failure.
10. Have the bin and cabinet been wiped clean?
11. Has the Manufacturers Registration form been
properly filled out? Check for correct model and
serial numbers from Serial nameplate, then mail
the completed card to the SCOTSMAN factory.
12. Has the owner/user been given the Service
Manual and instructed how to operate and
maintain the ice maker?
13. Has the owner been given the name and
telephone number of the authorized SCOTSMAN
Service Agency serving him?
LEVEL ASSEMBLY
SUMP
DRAIN
OPTIONAL
FILTER
HAND SHUT OFF
VALVE
HAND SHUT
OFF VALVE
FINAL INSTALLATION
WATER
COOLED
DRAIN
BIN
DRAIN
CME1202 & CME1402
January 1995
Page 9

INITIAL START UP
1. Remove the front panels by removing screws at
the base and pulling out.
2. Remove two screws and the control box cover.
3. Check that the two switches on the control box,
the ICE-OFF-WASH rocker switch and the
COMPRESSOR ON-OFF toggle switch are in the
OFF position.
4. OPEN the water supply line shut off valve.
5. Switch the electrical power to the machine ON.
6. Inside the control box is the shaft of the timer
and the switch assembly. Rotate the shaft of the
timer until the actuator arm on the microswitch
drops off outer cam into cam slot. See “Front View
of Timer”.
7. Move the ICE-OFF-WASH rocker switch to the
ICE position.
8. Check the water fill cycle: For several minutes
the inlet water valve will be open and water will
flow into the reservoir. Near end of the fill cycle,
water should be overflowing the reservoir and
draining thru the reservoir drain. If at the end of the
fill cycle the reservoir is not full, repeat step 6.
Check that the sump covers are snapped in place.
Check that the water distributors are properly
seated at the top of the evaporators, and that
water is flowing over all of the cube cells.
Note: Some water may spray from the evaporators
is normal when the machine is new. The spray will
stop after a few batches of ice.
9. When the sump has filled, move the compressor
ON-OFF toggle switch, to the ON position.
10. On air cooled models the fan motors will begin
to blow warm air out the back of the machine.
Water cooled models will begin to flow warm water
out of the condenser drain.
Note: To optimize the balance between ice
production and water use, the freeze cycle
discharge pressure must be 245 P.S.I.G. Check
the discharge pressure and adjust the water
regulating valve to obtain 245 P.S.I.G. discharge.
11. Check operation of the freezing cycle: Ice will
begin to form from the top of the evaporators to the
bottom. After the first cycle freezing time will range
between 13 - 18 minutes on CME1202 and 11 - 15
minutes for the CME1402.
CUBE SIZE
CONTROL
TIMER
CONTROL BOX
ON/OFF/WASH SWITCH
ICE LEVEL CONTROL
FRONT VIEW OF TIMER
MICROSWITCH
ACTUATOR
BUTTON
CAM
HARVEST
PORTION
FREEZE
PORTION
CME1202 & CME1402
January 1995
Page 10

INITIAL START UP
12. After an ice harvest check Cube Size.
There is just enough water available in the
reservoir to make one full sized batch of cubes.
The water pump may pick up some air at the end
of the freezing cycle, so at the end of freeze some
bubbles in the pump discharge hose is normal. If
the water pump stops pumping water before the
end of freeze, the cube size control may be set too
cold, or the water system may be leaking water.
Compare cube size to the "Cube Size Diagram"
To adjust cube size, locate cube size control on the
front of the control box. Rotate the adjustment
screw one eighth of a turn:
••Clockwise for LARGER ice cubes
••COUNTER Clockwise for SMALLER ice cubes
Observe size of the ice in the next ice cube
harvest and repeat the adjustment until the correct
ice cube size is achieved.
JUST RIGHT
TOO SMALL
When the cubes are the correct size, they will be
connected together vertically, and drop off in strips.
The batch weight will be about 13.5 to 14.5 lb.
Note: If the cubes at the bottom rows of some
evaporators are smaller than others, the size difference
does not affect capacity or performance. However, there
should be some ice in all cells. If not, contact the Factory.
CUBE SIZE DIAGRAM
CME1202 & CME1402
May 1995
Page 11

INITIAL START UP
13. Check harvest time. There must be enough
time in the harvest cycle to defrost all the cubes,
but not an excessive amount that will waste
capacity. The length of the harvest cycle is
determined by the timer cam positions.
If needed, adjust the harvest time so there are
about 15 seconds of harvest time left after the last
cube has fallen from the evaporators.
Because harvest time varies with the water and air
temperatures at the ice machine, colder air and
water will result in faster ice making, but require
more time for harvest. Do NOT adjust harvest
time too short or the machine will not harvest
all the ice.
The harvest time is set by: loosening the set screw
on the timer cam, rotating the shaft until the
opening between the cams is either increased or
decreased, and re tightening the set screw. More
of an opening between the high parts of the two
cams = more harvest time.
An adjustment of the cube size control may be
needed after the harvest time has been changed.
Check cube size again.
14. Check Bin Ice Level Control: With the ice
maker in the harvest cycle, place something solid
directly below the transducer socket (located in the
base to the left of the evaporators). The machine
will then switch off at the END OF THE HARVEST
CYCLE. Within seconds after removal of the
obstruction, the ice maker will restart.
The bin level control has two positions: Full and
Partial. Full is about 8" from the bottom of the
transducer socket. Note: The unit will make one
batch of ice when full if switched Off and then On.
15. Wash out the bin with clean, potable water.
16. Replace all covers, panels and screws.
17. Fill out the Warranty Registration and
Customer Evaluation form and send it in. Explain
to the owner/user the significant specifications,
operation, and maintenance requirements of the
ice machine. Inform the owner of the name and
telephone number of the local authorized
SCOTSMAN Distributor, or service agency.
CAMS
SET
SCREW
ADJUSTMENT OF THE TIMER
CME1202 & CME1402
January 1995
Page 12

FREEZING CYCLE OPERATION
Water from the sump assembly is pumped to the
water distributor system at the top of each
evaporator plate. From the water distributor the
water cascades by gravity over all cells of the plate
and to the sump assembly below.
At the beginning of the freezing cycle, the electrical
circuit is completed to the compressor and the
water pump. The water pump operates
continuously, through both the freezing cycle and
the harvest cycle.
During the freezing cycle, the hot gas solenoid
valve and the water inlet solenoid valve are
CLOSED. When the ice cubes are partially
formed, the cube size control (sensing bulb
attached to the suction line) will CLOSE, and
connect power to the timer motor. The timer then
controls the remainder of the freezing cycle. The
timer will keep the ice maker operating in the
freezing cycle for a selected length of time. This
will give the ice cubes time to fully form. after
which, the timer will switch the ice maker into the
harvest cycle, through the contacts of the timer
assembly microswitch.
WATER SCHEMATIC
INLET
WATER
VALVE
WATER DISTRIBUTION
RESERVOIR
DRAIN
RESERVOIR
ACCUMULATOR
WATER
INLET
VALVE
WATER PUMP
WATER
MANIFOLD
CONDENSER
HOT GAS VALVE
EVAPORATOR
FAN MOTOR
DISCHARGE
LINE COMPRESSOR
REFRIGERATION SCHEMATIC
CME1202 & CME1402
January 1995
Page 13

HARVEST CYCLE - HOT GAS BYPASS
When the timer switches the ice maker into the
harvest cycle, the finish relay is de-energized, and
the hot gas valve and inlet water valve OPEN.
Then high pressure, high temperature gas
refrigerant being discharged from the compressor
is diverted from the condenser through the hot gas
solenoid valve into each evaporator plate. During
this cycle, the refrigerant bypasses the condenser.
Both the compressor and the water pump are
operating.
The finished ice cubes are released from the sides
of each evaporator plate by the warming effect of
the hot gas condensing in each evaporator plate
and the water cascading over the ice cubes. The
released ice cubes drop into the ice storage bin
below. At the end of the harvest cycle, the timer
cam will push in the microswitch actuator arm. If
there is no ice close to the bin level control’s
transducer, a whole new cycle will begin. If there is
ice within 8" of the base of the machine (when the
bin level control is set for full) the ice maker will
shut OFF.
REFRIGERATION SCHEMATIC
RESERVOIR
ACCUMULATOR
WATER
INLET
VALVE
WATER
PUMP
WATER
MANIFOLD
CONDENSER
HOT GAS VALVE
EVAPORATOR
FAN MOTOR
DISCHARGE
LINE
COMPRESSOR
WATER SCHEMATIC
INLET
WATER
VALVE
WATER
DISTRIBUTION
RESERVOIR
DRAIN
CME1202 & CME1402
January 1995
Page 14

COMPONENT DESCRIPTION
Cube Size Control
This reverse acting thermostat controls the length
of the freezing cycle. It is sensing the temperature
of the suction line. When the suction line gets cold
enough, the cube size control closes (on
temperature fall) and starts the timer. Achange in
either ambient air or incoming water temperature
will affect the efficiency of the refrigeration system,
and this will vary the length of time it takes the
evaporator to reach the temperature at which the
cube size control is preset to close. See CUBE
SIZE ADJUSTMENT BEFORE attempting to adjust
the control.
Relay
The multi-function, three pole, double throw,
plug-in relay is inserted into a receptacle on the
printed circuit board in the control box. The relay
functions in part to by-pass the bin control to
prevent the ice maker from shutting OFF, when the
bin control opens during the freezing cycle. The
bypass action ensures full-sized ice cubes with
each harvest cycle.
Timer - Timer & Switch Assembly
The timer cam is controlled by the cube size
control. The outer surface, or large diameter lobe
of the timer cam, determines the timer cycle for
finish freezing of the ice cubes, while the inner
surface, or small diameter lobe, determines the
time cycle for the harvest cycle.
When the microswitch button is pushed in there is
power connected to the coil of the relay, and the
unit is in the freeze cycle. When the microswitch
button is released, the power to the relay is
stopped, and the unit goes into harvest. The
microswitch is actuated by a cam assembly
directly connected to the timer motor.
One complete rotation of the cam will take eight
minutes. Harvest is preset at three and one half
minutes, but is adjustable.
High Pressure Safety Control
This is a manual reset control that shuts down the
ice maker, should the discharge pressure ever
reach 450 PSIG (air cooled) or 400 PSIG (water
cooled). Found below the control box.
CONTROL SWITCH
DETAIL
TIMER AND
MICROSWITCH
CUBE SIZE
CONTROL
RELAY
ICE/OFF/WASH
SWITCH
BIN ICE LEVEL
SELECTOR SWITCH
CONTROL BOX
Hi Pressure Safety,
Push To Reset
CME1202 & CME1402
March 1995
Page 15

COMPONENT DESCRIPTION
Bin Level Control
This electronic control uses sound waves to
measure the distance between the bottom of the
ice machine and the top of the ice in the bin. It is
designed to control the machine’s ice production to
maintain that distance.
The control is adjustable so that the ice machine
will maintain a certain height of ice. When set at
FULL it will not allow the machine to fill the bin any
closer to the ice machine than about 8", and it will
not work if the distance to the bottom of the bin is
greater than 8 feet.
Because it uses sound waves, a slight “ticking”
sound can be heard coming from the bottom of the
machine.
There are two parts to the control, the circuit
board, and the level control switch.
BIN ICE
LEVEL
SELECTOR
SWITCH
ICE/OFF/WASH SWITCH
SOUND WAVES
FULL
PARTIAL
THE USER CAN SELECT THE
AMOUNT OF ICE TO BE
MAINTAINED IN THE BIN.
CME1202 & CME1402
January 1995
Page 16

COMPONENT DESCRIPTION
Water Inlet Solenoid Valve
The water inlet solenoid valve fills the sump
assembly with water. Extra water overflows out the
overflow standpipe of the sump. This action fills
and rinses the sump during each harvest cycle.
The flow rate is 1 g.p.m.
Water Distribution System
The water distribution system functions to evenly
supply water to all cells of the evaporator plates.
The water pump pumps water from the sump up
the vertical tygon tube to the tee. From there water
is channeled through the water manifold to the
water distributors, above each evaporator plate,
and from six holes within each distributor, water
flows to the cells of each side of the evaporator
plates. Gravity flow returns the unfrozen excess
portion of water to the sump reservoir for
recirculation.
Hot Gas Solenoid Valve
The hot gas solenoid valve opens only during the
harvest cycle, to divert the hot discharge gas from
the compressor, by passing the
condenser and capillary tube, for
direct flow to the evaporator plates
to release ice cubes from the ice
cube molds.
Fan Pressure Control -
Air-Cooled Models only.
In both freeze and
harvest cycles, the fan
pressure control functions
to maintain a minimum
discharge pressure by
cycling the fan on and off.
The approximate C.I. is
240 PSIG and C.O. is
190 PSIG.
HAND
VALVE
COMPONENT LOCATION
PUMP
SUMP
SUMP STANDPIPE
OPTIONAL
WATER FILTER
WATER
DISTRIBUTORS
DRAIN CAP
CME1202 & CME1402
January 1995
Page 17

CLEANING
A Scotsman Ice System represents a sizable investment of time and money in any company’s business. In
order to receive the best return for that investment, it MUST receive periodic maintenance.
Maintenance and Cleaning should be scheduled at a minimum of twice per year.
CLEANING: ICEMAKER
1. Remove screws and the front panel.
2. Switch the compressor switch to OFF. Switch
the WASH/OFF/ICE switch to OFF.
3. Remove the control box cover, and rotate the
shaft of the timer and switch assembly
CLOCKWISE advancing to the freezing cycle.
(Beginning of the higher part of the cam against
the microswitch).
4. Open the ice storage bin door and empty the bin
of ice.
5. Remove the hose clamp, rubber cap and drain
all the water from the sump assembly into a
container.
Replace the rubber cap and hose clamp.
6. Mix 24 ounces of Scotsman Ice Machine
Cleaner with 2 gallons of warm (950F. - 1150F.)
water.
7. Pour the cleaning solution into the reservoir until
full.
8. Move the WASH/OFF/ICE switch to the WASH
position.
9. Let the unit operate for 30 minutes.
During the wash cycle, if the machine runs out of
solution, mix 2 more gallons of solution per step 6,
refill the sump and continue the wash cycle for the
remainder of the 30 minutes.
10. Move the WASH/OFF/ICE switch to the OFF
position.
11. Remove the reservoir drain cap and drain the
cleaning solution from the sump. Replace the drain
cap.
12. Rotate the shaft of the timer and switch
assembly CLOCKWISE to the harvest position
(low part of the cam against microswitch). Move
the WASH/OFF/ICE switch to the ICE position to
start the Harvest cycle.
If, after completing this procedure, one or more
evaporator plates does not have a full flow of water
for each vertical column of cubes, shut down the
operation and remove and clean all water
distributor manifolds. Reinstall the water distributor
manifolds.
Note: The ice making portion of the water system
should be sanitized after cleaning by repeating
steps 2-12, except substitute an approved
sanitizing solution for the cleaning solution.
13. Move the compressor ON-OFF switch to the
ON position to start the ice making process.
CAUTION
DO NOT use ice produced from the cleaning
solution. Be sure none remains in the bin.
14. Check the next ice cube harvest to be sure that
the ice cubes are clear and the acid taste is gone.
15. Add hot water to the bin to melt the ice.
16. Replace all panels.
Scotsman Ice Machine
Cleaner contains acids.
These compounds may
cause burns.
If swallowed, DO NOT
induce vomiting. Give
large amounts of water
or milk. Call Physician
immediately. In case of
external contact, flush
with water.
KEEP OUT OF THE
REACH OF CHILDREN.
Electrical Shock Hazard.
Electrical shock can
cause personal injury.
Cleaning procedures
are done with the power
ON.
CME1202 & CME1402
January 1995
Page 18

CLEANING
AIR COOLED CONDENSER
1. Disconnect electrical power.
2. Remove front panel.
3. Clean or replace the air filter.
4. Check to see that the inside of the condenser is
clean; light should be visible through the fins. If not
clean the internal parts by vacuum, pressure
washer and/or coil cleaner.
Inlet Water Valve
The inlet side of the water valve has a screen in it
to protect the internal components from debris that
may be carried to the valve by the water. If the
screen becomes clogged, it must be cleaned off.
1. Shut off the water supply.
2. Unplug electrical connector from the valve.
3. Dismount valve from cabinet.
4. Remove inlet connection from valve.
5. Brush debris from sceen.
6. Reverse steps 1-4 to reassemble.
ICE STORAGE BIN
The interior liner of the bin is in contact with a food
product: ice. The storage bin must be cleaned
regularly to maintain a sanitary environment.
Scale that may form on the plastic liner can be
removed by scrubbing the surface with a mixture
of Scotsman Ice Machine Cleaner and hot water.
Remove any scale prior to sanitizing.
To Remove Scale:
1. Mix a cleaning solution of 4 ounces of Scotsman
Ice Machine Cleaner to 4 pints of hot (950F. to
1100F.) water.
2. Using rubber gloves, dip a nylon scouring pad
into the cleaning solution, and scrub the scale off
of the liner.
3. After all the scale has been removed, rinse all of
the surfaces inside the bin with potable water.
To sanitize the bin and ice machine interior.
Use an approved sanitizer and follow the
directions and warnings of that sanitizer or use the
following instructions for use of household bleach,
if it meets local codes:
1. Mix a sanitizing solution of 1 ounce of
household bleach to 2 gallons of water.
2. Using clean rubber gloves and a clean cloth,
wipe all interior surfaces of the ice machine and
ice storage bin with the sanitizing solution.
Immerse any small parts in the sanitizing solution
and wash the parts, flushing the solution
thoroughly in, over and through all parts and
surfaces of the parts being cleaned.
3. Allow to air dry.
AIR COOLED
CONDENSER
MUST BE
CLEAN
CLEANING
CONDENSER
FILTER
The fan blade can
cause personal injury.
Disconnect power
before beginning to
clean condenser.
Scotsman Ice Machine
Cleaner contains acids.
These compounds may
cause burns.
If swallowed, DO NOT
induce vomiting. Give
large amounts of water
or milk. Call Physician
immediately. In case of
external contact, flush
with water.
KEEP OUT OF THE
REACH OF CHILDREN.
CME1202 & CME1402
January 1995
Page 19

ADJUSTMENTS
Adjustment Of The Cube Size Control
CAUTION
BEFORE adjusting the cube size control, check
other possible causes for cube size problems,
refer to Service Diagnosis section. DO NOT
perform adjustment when a new cube size control
is installed until the control bulb has been properly
installed in the tube well, insulated and the ice
maker has been through a complete freezing and
harvest cycle.
Adjustment of the cube size control is available to
change the cubes to the correct size, see INITIAL
START UP.
To produce LARGER sized ice cubes:
1. Locate the cube size control, on the front of the
control box.
2. Rotate the adjusting knob one-eighth of a turn
Clockwise.
3. Observe size of ice cubes in next ice cube
harvest and, if needed, repeat step 2 above until
correct ice cube size is achieved.
To produce SMALLER sized ice cubes:
1. Locate the cube size control, on the front of the
control box.
2. Rotate the adjusting knob one-eighth of a turn
COUNTER Clockwise.
3. Observe size of ice cubes in next ice cube
harvest and, if needed, adjust again until correct
ice cube size is achieved.
ADJUSTMENT
OF THE WATER
REGULATING
VALVE
Adjustment of the Water Regulating Valve
Water Cooled models maintain a constant
discharge pressure by varying the flow of water
thru the water cooled condenser.
The discharge pressure should be set for 220
PSIG.
If change is required, attach a refrigeration gage
manifold to the ice machine service ports, and
check the discharge pressure in a freeze cycle.
Adjust the stem of this valve until 220 PSIG is
achieved.
CME1202 & CME1402
January 1995
Page 20