Scotsman CME456R Service Manual
Introduction
CME456R
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.
Be certain that the information applies to the model
in question. If no model is listed, the information
applies to all models.
Table of Contents
Specifications .............. Page 2
Condenser and Ice Machine Layouts . . Page 3
Pre-Installation .............. Page 4
Location & Assembly ........... Page 5
Bin Control: Optional Installation ..... Page 6
For The Installer: Remote Condenser . . Page 7
Remote Condenser Location ...... Page 8
Coupling Instructions ........... Page 9
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 Sequence & Other
Notes .................. Page 22
Sanitation and Cleaning ........ Page 23
Additional Maintenance ......... Page 24
Additional Maintenance: Inlet Water Valve Screen
......................Page 25
Additional Maintenance: Ice Sensors, Condenser
......................Page 26
Service Diagnosis: Diagnostic Light Analysis .
......................Page 27
Fan Relay Kit .............. Page 10
Electrical ................ Page 11
Plumbing ................ Page 12
After Utility Connections ........ Page 13
Component Location and Function . . . Page 14
AutoIQ Controller ............ Page 15
Initial Start Up .............. Page 16
Adjustments .............. Page 17
How To Operate The AutoIQ Controller Page 18
How The Electronic Cuber Works . . . Page 19
How The Electronic Cuber Works . . . Page 20
Technicians Only: Freeze Cycle Sequence . . .
......................Page 21
Service Diagnosis ........... Page 28
Service Diagnosis: Components .... Page 29
Service Diagnosis ........... Page 30
Operational Characteristics: CME456R Page 31
Removal and Replacement ....... Page 32
Removal and Replacement: AutoIQ Controller .
......................Page 33
Removal and Replacement: Water Level Sensor
......................Page 34
Refrigerant ............... Page 35
Before Calling for Service ....... Page 36
Parts Lists and Wiring Diagrams are in the section at the center of this manual.
December 2000
Page 1
CME456R
Specifications
This ice machines is designed to be installed
indoors, in a controlled environment. It can operate
satisfactorily under a wide variety of conditions.
However, 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.
Ice Machine Operational Limits
Minimum Maximum
Air Temperature 50oF. 100oF.
Water Temperature 40oF. 100oF.
Water Pressure 20 psi 80 psi
Voltage (60 Hz) 104 126
Remote Condenser Operational Limits
Minimum Maximum
Air Temperature -20oF. 120oF.
Voltage (60 Hz) 104 126
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.
Bins:
Designed to fit a standard, 22" wide or wider open
top Scotsman Ice Storage Bin. Some examples
are:
BH360: Direct Fit
•
HTB555 - use KBT27
•
Bins with short or no baffles require the
•
addition of thermostat kit KSTAT-22 to lower
the ice level
Dispensers
ID150: Add adapter kit KBT42
•
HD22: Direct fit
•
Condensers
Single Circuit, 60 Hz: ERC111-1
•
Dual Circuit, 60 Hz: ERC211-1
•
Also, a Fan Relay Kit is needed when connecting
two ice machines to one condenser:
KCMR120 relay kit used with 115 volt 60 Hz
•
units
In addition, there may be other bins and
dispensers that can be used, check Scotsman’s
sales literature for application information.
Precharged Tubing:
•
25’ RTE25
•
40’ RTE40
•
75’ RTE75
BASIC INFORMATION
Dimensions
Model Number
CME456RS-1C 22“ x 24" x 28" 115/60/1
WxDxH
(w/o bin)
Basic Electrical
(volts/Hz/phase)
Use Condenser
ERC111-1A (1 ice
machine) or
ERC211-1A (2 ice
machines)
Use precharged tubing kits, RTE25 (25’) or RTE40 (40’) or RTE75 (75’). Select the length closest to
the needs of the particular installation.
June 2004
Page 2
Refrigerant
Charge
R-404A
192 oz 20 20
Minimum
Circuit
Ampacity
Maximum
Fuse Size
Condenser and Ice Machine Layouts
CME456R
Bin Stat
Thru Hole
12.88 in
32.7 cm
3.75 in
9.5 cm
Bin Stat
Bracket
Mounting
Holes
8.75 in
22.2 cm
Plan View
11.38 in
28.9 cm
1.25 in
3.2 cm
2.63 in
6.7 cm
4.00 in
10.2 cm
1.75 in
4.4 cm
16.7 in
42.4 cm
22.00 in
55.9 cm
Ice Opening
December 2000
Page 3
CME456R
Pre-Installation
Other Applications:
Check sales literature for additional information.
Note: Slope-front bins must have an internal baffle.
Scotsman BH375 has the required baffle, and the
BH260 does not need one. Baffle must be
approximately in the position shown in the diagram
below.
Baffle
12.0"
4.0"
Side View
Electrical:
Check the nameplate for electrical requirements.
The nameplate is located on the back of the ice
machine. If the information on the nameplate is
different from other published information, go by
the nameplate data.
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 also have treatment in them for
dissolved solids. Check with a water treatment
service for a recommendation.
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 with at a “Standard”
water rinse. Standard water rinse is designed to be
compatible with typical water conditions. The
machine may be adjusted to a different 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.
While the model and
serial number are on
the nameplate, a
serial number plate
is located at the
front of the machine,
behind the front
panel and to the right
of the purge valve.
Nameplate, on back panel
Serial Number Plate, remove front
panel to locate.
Note: Water use adjustments are customer
convenience adjustments; they are NOT factory
defects and are NOT covered by warranty.
December 2000
Page 4
Location & Assembly
CME456R
Locate the ice machine indoors. A 6 inch minimum
clearance on the back and sides is required for the
proper operation and service of this machine.
Locate the remote condenser as close as possible
to the ice machine. See page 11 for details.
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: This unit may not be stacked.
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.
Note: If recycling a prior bin, be sure that the bin
top gasket is in good condition or seal the ice
machine to the bin with food grade sealant.
Level the top edge of the bin front to back and left
to right.
Cabinet Panel Removal:
1. Remove the front panel by removing the two
screws connecting the top of the front panel to the
machine, then pull out at the bottom.
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.
If the ice machine has not been unpacked, do so
now. Remove the carton from the skid. Remove
shipping straps.
Remove the front panel and all packaging
materials.
After all packing materials have been removed
from the ice machine, lift or hoist the machine onto
the bin. Align the sides and back of the machine
with the sides and back of the bin.
Secure the ice machine to the bin with the two
metal straps and 4 bolts provided.
3. Remove two screws at the front of each side
panel, and pull them forward until they release
from the tabs connecting them to the back panel.
December 2000
Page 5
CME456R
Bin Control: Optional Installation
The normal bin control is the ice sensor system. A
bin thermostat may be required in some cases, It
must be field installed after the ice machine has
been placed on the bin.
Before starting, remove the front panel and any
baffle in the bin.
1. Place thermostat in machine behind the high
voltage box. Secure to existing holes with two
screws. Locate bin thermostat bulb.
6. Fasten the bracket to the bottom of the ice
machine with the two 3-pronged knobs supplied
with the unit.
7. Pull excess capillary tubing into the machine.
2. Route bulb thru routing tube (located between
the compressor and the reservoir).
3. Connect harness to bin thermostat and to
controller.
4. Locate bin thermostat bracket.
Routing Hole
8. 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
o
o
8000 340
9000 385
o
o
5. Carefully position the thermostat bulb on the
bracket.
December 2000
Use This Table to Adjust Thermostat
Page 6
For The Installer: Remote Condenser
CME456R
Locate the condenser as near as possible to the
interior location of the ice maker.
Note: The location of the condenser relative to the
ice machine is LIMITED by the specification on the
following page.
Select the best available location, one that protects
the condenser from excessive dust, grease & sun.
Meet all applicable building codes.
Roof Attachment
Install and attach the remote condenser to the roof
of the building, using the methods and practices of
construction that conform to the local building
codes, including having a roofing contractor secure
the condenser to the roof.
Note: If using any other condenser besides the
ERC111 or ERC211, its use must be approved by
Scotsman, and a head pressure control valve must
be connected to the condenser coil.
Line Routing
Do not connect the tubing until all routing
and forming of the tubing is complete.
See the Coupling Instructions for final
connections.
3. Route the refrigerant tubes thru the roof
opening. Follow straight line routing whenever
possible.
If connecting two ice machines, be sure that the
tubes from ice machine #1 are connected to one
circuit of the condenser and the tubes from ice
machine #2 are connected to the other.
Note: Excess tubing may EITHER be coiled up
INSIDE the building OR cut out prior to connection
to the ice maker and condenser.
If the excess tubing is cut out, after re-brazing the
tubing must be evacuated prior to connection to
the ice maker or condenser.
If the excess tubing is to be coiled, spiral it
horizontally to avoid excess trapping in the lines.
Note: A 36" service loop may be placed behind the
ice machine.
5. Have the roofing contractor seal the holes in the
roof per local codes.
ERC111 Remote
Condenser
Electrical Power
Supply
If two CME456R ice machines are to be
installed, mark one as Ice Machine #1
and the other as Ice Machine #2. Tag
their refrigerant lines the same way.
1. Each set of pre-charged tubing lines
3
contains a
1
” diameter discharge line. Both ends of
2
“ diameter liquid line, and a
8
each line have quick connect couplings,
the end without access valves goes to
the ice maker.
Note: The openings in the building ceiling
or wall, listed in the next step, are the
minimum sizes recommended for
passing the refrigerant lines through.
2. Have the roofing contractor cut a
minimum hole for the refrigerant lines of
2“. Check local codes, a separate hole
may be required for the electrical power
supply to the condenser.
Caution: Do NOT kink the refrigerant
tubing while routing it.
Coil Excess
Tubing
Horizontally
Within the
Building
December 2000
Page 7
Typical Installation
CME456R
Remote Condenser Location
Use the following for planning the placement of the
condenser relative to the ice machine
Location Limits - condenser location must not
exceed ANY of the following limits:
Maximum rise from the ice machine to the
•
condenser is 35 physical feet
Maximum drop from the ice machine to the
•
condenser is 15 physical feet
Physical line set maximum length is 100
•
feet.
Calculated line set length maximum is 150.
•
Calculation Formula:
Drop = dd x 6.6 (dd = distance in feet)
•
Rise = rd x 1.7 (rd = distance in feet)
•
Horizontal Run = hd x 1 (hd = distance in
•
feet)
Calculation: Drop(s) + Rise(s) + Horizontal
•
Run = dd+rd+hd = Calculated Line Length
Configurations that do NOT meet these
requirements must receive prior written
authorization from Scotsman.
Do NOT:
Route a line set that rises, then falls, then
•
rises.
Route a line set that falls, then rises, then
•
falls.
Calculation Example 1:
The condenser is to be located 5 feet below the ice
machine and then 20 feet away horizontally.
5 feet x 6.6 = 33. 33 + 20 = 53. This location would
be acceptable
Calculation Example 2:
The condenser is to be located 35 feet above and
then 100 feet away horizontally.
35 x 1.7 = 59.5. 59.5 +100 = 159.5. 159.5 is
greater than the 150 maximum and is NOT
acceptable.
rd
22.87"
dd
17.15"
Max 35’
Max 15’
Remote
Condenser
Located ABOVE
Ice Machine
Remote
Condenser
Located BELOW
Ice Machine
hd
40.35"
Condenser Distance &
Location Schematic
December 2000
Page 8
Coupling Instructions
CME456R
The couplings on the ends of the pre-charged line
sets are self-sealing when installed properly.
Follow these instructions carefully.
These steps must be performed by an EPA
Certified Type II or higher technician.
Initial Connections
1. Remove the protector caps and plugs. Wipe the
seats and threaded surfaces with a clean cloth to
remove any possible foreign matter.
2. Thoroughly lubricate the threads, o-rings,
diaphragms and all internal coupling surfaces with
polyolester refrigerant oil.
Clean and Lubricate Couplings
3. Position the fittings on the correct connections
on the condenser and ice machine.
•
1
The
“ discharge line (schrader valve end)
2
goes to the remote condenser fitting marked
“discharge line”.
•
3
The
“ liquid line (schrod valve end) goes to
8
the remote condenser fitting marked “liquid
line”.
•
1
The
“ discharge line goes to the ice maker
2
fitting marked “discharge line”.
•
3
The
“ liquid line goes to the ice maker
8
fitting marked “liquid line”.
4b. Using two wrenches, one to rotate the swivel
nut and one to hold the tubing in place, tighten
each coupling.
It is CRITICAL that ONLY the NUT on the
pre-charged tube be turned, or the diaphragms will
be torn by the piercing knives and become loose in
the refrigeration system causing severe
operational problems.
Tighten Swivel Nut
Note: As the coupling is tightened, the diaphragms
in the quick connect couplings will begin to be
pierced. As that happens, there will be increased
resistance to tightening the swivel nut.
4c. Continue tightening the swivel nut until it
bottoms out or a very definite increase in
resistance is felt (no threads should be showing).
Do NOT overtighten.
5. Use a marker or pen to mark a line on the
coupling nut and unit panel. Then tighten the
coupling nut an additional one-quarter turn. The
line will show the amount that the nut turns.
6. After all connections have been made, and after
the liquid line valve has been opened (do not open
yet), check the couplings for leaks.
Note: The system charge is contained in the
receiver tank of the ice machine. Only “holding"
charges are present in the “pre-charged" tubing or
the condenser.
Final Connections:
4a. Begin to tighten the couplings together by
hand. Continue to turn the swivel nuts by hand
until it is certain that the threads are properly
engaged.
December 2000
Rotate Swivel Nut ¼ Turn More
Page 9
CME456R
Fan Relay Kit
When two CME456Rs are located near each other
and are connected to the same ERC211 remote
condenser, a fan relay kit, KCMR120 is required to
operate the condenser’s fan motor.
1. Attach the relay box of the KCMR120 to a
location that is convenient for installation and
future service.
2. Attach a solid earth ground wire to the ground
screw.
Electrical Shock Hazard
Disconnect Electrical
Power Before Beginning
3. Route the connecting wires from the first ice
machine's fan wires to the relay kit terminal strip
posts marked: No. 1 Ice Machine.
Put the Hot (line) wire on Terminal 1 and the
•
Neutral wire on Terminal 2.
4. Route the connecting wires from the second
machine's fan wires to the relay kit terminal strip
posts marked: No. 2 Ice Machine.
•
Put the Hot (line) wire on Terminal 3 and the
Neutral wire on Terminal 4
5. Attach wires at the fan relay kit terminal strip
marked: To Remote Fan, and route them to the
remote condenser electrical connection.
Terminals 2 and 4 must be connected to a
•
common leg (such as N).
B. After initial start up, test with a volt meter
(compressors must be ON).
1. Switch on ice maker #1, then ice maker #2.
2. Test with a volt meter between the terminals
and ground.
3. List the voltages and compare them to what
they should be.
Tested Voltage Should Be
Terminal #1 to ground: 104 to 126 volts
•
Terminal #2 to ground: near zero
•
Terminal #3 to ground: 104 to 126 volts
•
Terminal #4 to ground: near zero
•
Tested Voltage Was:
Terminal #1 to ground: _____
•
Terminal #2 to ground: _____
•
Terminal #3 to ground: _____
•
Terminal #4 to ground: _____
•
If the voltages are not correct:
A. Switch off ice maker number 2, and then switch
off ice maker number 1.
B. After the units have stopped, disconnect the
electrical power. Do all wiring with the
electrical power disconnected to BOTH ice
makers at the source.
C. Reverse the connections at the KCMR120
terminal strip that measured incorrectly.
6. Make the proper electrical connection at the
junction box.
Conform to all applicable codes.
Phasing: To be certain that a reliable installation
of the KCMR120 kit has been accomplished, a
check of the electrical phasing is required.
If the power is not connected properly the
relay will fail in a cycle or two and there may
be an electrical overload.
A. Before initial start up. Compare the illustration
of the KCMR120 terminal strip to the connections
at the KCMR120:
•
Terminals 1 and 3 must be connected to a
common leg (such as L1).
December 2000
D. Reconnect electrical power.
KCMR120 RELAY BOX
Page 10
Electrical
CME456R
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.
The ice maker is designed to operate on its own
electrical circuit and must be individually fused.
Voltage variation must not exceed the limits listed
on page 2.
The remote condenser is designed to be powered
from the ice machine. A separate knockout hole
has been provided in the ice maker electrical
junction box.
Remote
Condenser
Note: Central Condensers connected to more than
one refrigeration system will likely have a wiring
scheme to control the fan motor. Follow those
directions for condenser wiring.
Electrical connections are made in the junction box
in the back of the cabinet.
1. Remove the junction box cover.
2. Knock out both holes for a field supplied strain
relief.
3. Install wires and strain reliefs per code. Note:
Condenser fan motor wires are tagged.
4. Connect to wires and secure ground wire to
ground screw inside junction box.
All external wiring should conform to the national,
state and local electrical code requirements.
Usually an electrical permit and the services of a
licensed electrician will be required.
Interconnecting
Wires
Power
Supply
Power IN
Power OUT
December 2000
Page 11
CME456R
Plumbing
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
" OD.
4
3
" OD.
8
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:
3
All models have 1 water supply connection, a
"
8
male flare at the back of the cabinet. Connect to
cold potable water that has adequate pressure.
Note: Using water supply tubing smaller than
3
"
8
will cause severe operational issues.
Water Filters:
The water filters must flow at least 1.25 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:
3
All models have 1 gravity drain connection, a
"
4
FPT fitting at the back of the cabinet. Use only
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.
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
Bin Drain
Electrical OUT to
Condenser Fan
Electrical IN
Water IN
Water OUT
December 2000
Page 12
Loading...