Scotsman CMS1202R 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
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
For the Installer
Location & Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Stacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
For the Electrician . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
For the Plumber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Final Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Initial Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Freeze Cycle Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Harvest Cycle Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Service Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Removal and Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Parts Lists and Wiring Diagrams are located
in the center of this manual, printed on
yellow paper.
CMS1202R
September 1993
Page 1

Model Number Dimensions
(without bin)
W" x D" x H"
Basic
Electrical Refrigerant Type Minimum Circuit
Ampacity*
Maximum
Fuse
Size
Refrigerant
Charge**
R-22
Condenser
Type
CMS1202RE-3B 48 x 243⁄8x 271⁄2208-230/60/3 R-22 15.2 20 256 oz. Remote Air
CMS1202RE-32B 48 x 243⁄8x 271⁄2208-230/60/1 R-22 21.2 30 256 oz. Remote Air
* Minimum Circuit Ampacity is used to determine wire size and type per the National Electric Code.
** The unit is shipped with the full charge in the receiver. For re-charging purposes, if the nameplate charge
is different than this number, go by the nameplate.
Use Scotsman remote condenser RC1422. Use precharged tubing kit RT2225 (25’) or RT2240 (40").
This ice system (except remote condenser) is designed to be installed indoors, in a controlled environment.
MINIMUM MAXIMUM
Air Temperature 500F. 1000F.
Water Temperature 400F. 1000F.
Water Pressure 20 psi 80 psi
Voltage -5% +10%
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.S.A.
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.
FOR THE INSTALLER
The CMS1202R will fit the following Scotsman ice
storage bins:
••BH900
••BH1000 (with bin top KBT21)
••BH1360
and it will stack (with kits) onto the following ice
machines:
••CMS1402 (with stacking kit KSCMS48)
••CMS1202 (with stacking kit KSCMS48)
Aremote condenser and precharged tubing kit are
required to assemble this ice system.
The normal finish for the machine is enamel
sandalwood. An optional stainless steel panel kit
(SPKCM1402) can be field installed. It contains a
stainless steel top, left side panel, an overlay right
side panel, and front panel.
This manual covers both Aand B models (B
models have 2 front panels).
CMS1202R
September 1993
Page 2

FOR THE INSTALLER: Location & Assembly
Location:
After uncrating and inspection, the unit is ready for
installation. It is important that the machine be
installed in a location where it has enough space
around it to be accessible for service. Try to avoid
hot, dirty and crowded locations. Be sure that the
location for the machine is within the
envrionmental limitations.
Storage Bin:
Tip the storage bin on its back, using parts of the
carton to protect the exterior finish. Install the legs,
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. After mounting the legs, position the ice storage
bin in the selected location:
Note: Allow enough space to the left and back to
service the machine. Do NOT push the bin into
postion, 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.
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 mechancial 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
machine to secure the ice machine to the bin.
When alignment and leveling are completed,
tighten the bolts to secure the mounting straps.
Remove the front panel, and remove the
evaporator shipping brackets and hardware.
SHIPPING
BRACKETS
ICE MACHINE AND BIN ASSEMBLY
CMS1202R
September 1993
Page 3

FOR THE INSTALLER: Location & Assembly
Stacking Instructions
When stacking two units, remove the top panel
and the evaporator cover from the lower icemaker.
(The top removed from the lower icemaker will no
longer have any function.)
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 icemakers, bolt the upper
icemaker cabinet to the lower icemaker cabinet
using the mounting straps and bolts from the
hardware package.
Astacking kit is required to interconnect the CMS
ice level controls.
EVAPORATOR COVER
STACKING
TRIM STRIP - PART OF
KSCMS48 STACKING KIT
CMS1202R
September 1993
Page 4

FOR THE INSTALLER: Remote Condenser
Locate the condenser as near as possible to
the interior location of the ice maker.
Location of the condenser is limited by the specific
length of precharged refrigerant tubing supplied for
the application. The pre-charged tubing connects
the icemaker to the remote condenser. The
condenser must be above the ice maker.
Select the best available location, protecting the
condenser from extremes of dirt, dust, and sun.
Meet all applicable building codes.
Roof Attachment:
Install and attach the remote condenser unit 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.
Precharged Line Routing
/////////////////////////////CAUTION///////////////////////////////
Do not connect precharged tubing until all routing
and forming of the tubing is complete. See the
coupling instructions for connecting instructions.
////////////////////////////////////////////////////////////////////////////
1. Each set of precharged refrigerant lines consists
of a 3/8 inch diameter liquid line, and a 1/2 inch
diameter discharge line. Both ends of each line
have quick connect couplings, the end without
access valves goes to the icemaker.
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.
REFRIGERANT
CONNECTIONS
TYPICAL
INSTALLATION
LOCATE CONDENSER
NO LOWER THAN ICE
MACHINE
2. Have the roofing contractor cut a
minimum hole for the refrigerant lines of
1.75". Check local codes, a separate
hole may be required for the electrical
power to the condenser.
/////////////////////////////CAUTION/////////////////////
///////////
DO NOT KINK OR CRIMP
REFRIGERANT TUBING WHEN
INSTALLING IT.
//////////////////////////////////////////////////////////////////
//////////
3. Route the refrigerant lines through
the roof opening.
Follow straight line routing whenever
possible.
Any excess tubing MUST be retained
within the building.
4. Spiral any excess length of pre
charged tubing inside the building. Use
a horizontal spiral (as illustrated) to
avoid any traps in the lines.
5. Have the roofing contractor seal the
holes in the roof per local codes.
CMS1202R
September 1993
Page 5

FOR THE INSTALLER: Coupling Instructions
////////////////////////////////CAUTION/////////////////////////////////
The couplings on the sets of precharged lines are
self sealing when installed properly. Carefully
follow the instructions:
////////////////////////////////////////////////////////////////////////////////
Initial Connections:
1. Remove the protector caps and plugs. Wipe the
seats and threaded surfaces with a clean cloth to
be certain that no foreign matter remains on them.
2. Lubricate the inside of the couplings, especially
the O-Rings with refrigerant oil.
••The 1/2 inch discharge line (schrader valve
end) goes to the remote condenser fitting
marked “discharge line”.
••The 3/8 inch liquid line (schrader valve end)
goes to the remote condenser fitting marked
“liquid line”.
••The 1/2 inch discharge line goes to the
icemaker fitting marked “discharge line”.
••The 3/8 inch liquid line goes to the icemaker
fitting marked “liquid line.”
Final Connections:
3. Begin tightening the couplings together by
hand, then using two wrenches (it is important that
ONLY the nut on the precharged lines be turned,
the other parts of the couplings must NOT be
allowed to turn or the process will tear out the
diaphragms and they will be loose in the
refrigeration system) tighten the coupling until it
bottoms out or a definite increase in resistance is
felt.
4. Using a marker or pen, mark a line lengthwise
from the coupling union nut to the bulkhead. Then
tighten the coupling and additional 1/4 turn. As the
nut turns, the line will show when 1/4 turn is made.
5. After all connections are made, and after the
king valve has been opened, check the couplings
for leaks.
SCHRADER
VALVES
LIQUID LINE
DISCHARGE LINE
INSULATION
TIGHTENING THE QUICK CONNECTS
CMS1202R
September 1993
Page 6

FOR THE ELECTRICIAN
SEE NAMEPLATE for current requirements to
determine wire size to be used for electrical
hookup. When the cuber and the remote
condenser are connected, each must be grounded
to the other using the ground screws provided in
the respective junction boxes. The cuber then
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
icemaker.
The remote condenser is designed to be powered
from the ice machine. There is a separate
electrical junction box at the back of the ice maker
for the remote condenser. Wire the remote
condenser to the ice maker in accordance with
local and national electric codes. All outdoor wiring
must be in rainproof conduit.
The condenser fan motor will run whenever the
compressor is running.
Electrical connections are made at the rear of
the icemaker, 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.
INTERCONNECTING
WIRES
GROUND
SCREW
DETAIL OF JUNCTION BOX, 3 PHASE SHOWN
ELECTRICAL CONNECTIONS
HAND
DISCONNECT
SWITCH
REMOTE CONNECTION
POWER
SUPPLY
CMS1202R
September 1993
Page 7

FOR THE PLUMBER
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. ln 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. Even though there isn’t one filter that
will cure all water problems, a good filter combined
with a polyphosphate feeder gives about the best
overall performance.
DRAIN
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 5/8 inch O.D. copper tubing and should be
vented and run separately. Insulation for high
humidity areas is recommended.
The ice machine sump drain is 3/4" FPT. There
must be a vent at this connection for proper sump
draining.
WATER SUPPLY AND DRAIN CONNECTION
AIR GAP BETWEEN
DRAIN LINES AND
BUILDING DRAIN
BIN
DRAIN
VENT
3/8" MALE FLARE
SUMP DRAIN MUST
BE VENTED
OPTIONAL
FILTER
POTABLE
WATER
SUPPLY
HAND
SHUT OFF
VALVE
3/4" FPT
CMS1202R
September 1993
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 clearance at the left and back sides of
the cabinet for service access?
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 to
the SCOTSMAN factory.
12. Has the owner/user been
given the Service Manual and
instructed how to operate and
maintain the icemaker?
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
FINAL INSTALLATION
BIN DRAIN
PRECHARGED
LINES
CONNECTED
CMS1202R
September 1993
Page 9

INITIAL START UP
Before Start Up:
1. Check that the ICE-OFF-WASH rocker switch
and the Compressor ON-OFF switch are in the
OFF position.
2. Switch on the electrical power. Electrical power
must be supplied to the ice machine for 12 hours
before starting the compressor for the first time.
The crankcase heater will now warm up the
compressor’s oil. The oil is warmed to evaporate
any refrigerant that may have collected in it. If
there is refrigerant in the oil when the compressor
starts, the oil will foam and will not lubricate the
compressor properly, shortening its life.
Do not start the compressor for the first time
unless the dome of the compressor is warm.
Start Up:
1. Remove front panel(s) by removing screws at
the base and pulling out.
2. Remove two screws and the control box cover.
3. OPEN the water supply line shut off valve..
4. Open the “king” valve on the receiver.
5. Inside the control box is the shaft of the timer
and the switch assembly. Rotate the shaft of the
timer and switch assembly clockwise until the
actuator arm on the microswitch drops off outer
cam into cam slot. See “Front View of Timer”.
6. Move the ICE-OFF-WASH to the ICE position.
7. Check the water fill cycle: For several minutes
the inlet water valve will be open and water will
flow into the reservoir. Near the 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
5.
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 cube cells.
Note: Some water spray from the evaporators is
normal when the machine is new. The spray will
quit after a few cycles.
8. When the sump has filled, move the compressor
ON-OFF toggle switch, to the ON position.
CUBE SIZE
CONTROL
TIMER
CONTROL BOX
ICE/OFF/WASH
BIN ICE LEVEL SWITCH
FRONT VIEW OF TIMER
MICROSWITCH
ACTUATOR
BUTTON
CAM
HARVEST
PORTION
FREEZE
PORTION
CMS1202R
September 1993
Page 10