Scotsman TC 180 User manual

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SERVICE MANUAL
TC 180
Electronic
counter nugget
ice dispenser
MS 1000.59 REV. 09/2001

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TABLE OF
CONTENTS
2
3
Table of contents page
Specifications
GENERAL INFORMATION AND INSTALLATION
Introduction
Unpacking and Inspection
Location and levelling
Electrical connections
Water supply and drain connections
Final check list
OPERATING INSTRUCTIONS
Start up
Operational checks
PRINCIPLE OF OPERATION (How it works)
Water circuit
Refrigerant circuit
Mechanical system
Operating pressures
Components description
ADJUSTMENT, REMOVAL AND REPLACEMENT PROCEDURES
Wiring diagram
Service diagnosis
MAINTENANCE AND CLEANING INSTRUCTIONS
General
Icemaker
Cleaning instructions of water system
5
5
5
5
6
6
7
8
17
18
11
11
12
13
14
20
20
20

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SPECIFICATIONS
ice making capacity
ELECTRONIC COUNTER NUGGET DISPENSER TC 180
Important operating requirements:
MIN MAX
- Air temperature 10°C (50°F) 40°C (100°F)
- Water temperature 5°C (40°F) 35°C (100°F)
- Water pressure 1 bar (14 psi) 5 bars (70 psi)
- Electr. voltage
variations fromvoltage
rating specified
on nameplate -10% +10%
NOTE.Thedailyice-makingcapacityisdirectlyrelatedtothecondenserairinlettemperature,water
temperature and age of the machine.
TokeepyourSCOTSMANNUGGETDISPENSER atpeakperformancelevels,periodicmaintenance
checks must be carried out as indicated on page 21 of this manual.
32
38
10
21
150
140
130
120
110
100
90
80
70
Kg.
32 10 °C
27 21 15
°C
o
o
AIR COOLED MODELS
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.

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Start Electric power cons.
Amps Kwh per 24 HR
Basic electr. Amps Watts Nr. of wires Amps fuse
SPECIFICATIONS
Model Cond. unit Finish Comp. HP Ice bin
cap Water req. lt/24 HR
TC 180 - MACHINE SPECIFICATIONS
230/50/1 3.2 17 550 13 3 x 1.5 mm210
TC 180 AS Air S. Steel 3/8 5 Kg. 150

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GENERAL INFORMATION AND INSTALLATION
A. INTRODUCTION
This manual provides the specifications and the
step-by-stepproceduresfortheinstallation,start-
up and operation, maintenance and cleaning for
the SCOTSMAN TC 180 counter nugget ice
dispenser.
Their ice making systems are thoroughly tested
providing the utmost in flexibility to fit the needs
of a particular user.
NOTE.Toretainthesafetyandperformance
built into this icemaker, it is important that
installation and maintenance be conducted
in the manner outlined in this manual.
B. UNPACKING AND INSPECTION
1. CallyourauthorizedSCOTSMANDistributor
or Dealer for proper installation.
2. Visually inspect the exterior of the packing
and skid. Any severe damage noted should be
reportedtothedeliveringcarrierandaconcealed
damageclaimformfilledinsubjettoinspectionof
the contents with the carrier’s representative
present.
3. a) Cut and remove the plastic strip securing
the carton box to the skid.
b)Cutopenthetopofthecartonandremove
the polystyre protection sheet.
c) Pull out the polystyre posts from the
corners and then remove the carton.
4. Removethe topandsidespanels oftheunit
and inspect for any concealed damage. Notify
carrier of your claim for the concealed damage
as stated in step 2 above.
5. Remove all internal support packing and
masking tape.
6. Checkthatrefrigerantlinesdonotrubagainst
or touch other lines or surfaces, and that the fan
blades move freely.
7. Check that the compressor fits snugly onto
all its mounting pads.
8. Use clean damp cloth to wipe the surfaces
outside of the cabinet.
9. See data plate on the rear side of the unit
and check that local main voltage corresponds
with the voltage specified on it.
CAUTION. Incorrect voltage supplied to
the icemaker will void your parts
replacement program.
10. Removethemanufacturer’sregistrationcard
from the inside of the User Manual and fill-in all
parts including: Model and Serial Number taken
from the data plate.
Forward the completed self-addressed
registration card to SCOTSMAN EUROPE
factory.
C. LOCATION AND LEVELLING
WARNING.ThisIceDispenserisdesigned
for indoor installation only. Extended
periods of operation at temperature
exceeding the following limitations will
constitute misuse under the terms of the
SCOTSMAN Manufacturer’s Limited
Warranty resulting in LOSS of warranty
coverage.
1. Position the unit in the selected permanent
location.
Criteria for selection of location include:
Min Max
Air Temperature 10°C40°C
Water Temperature 5°C35°C
Water pressure 1 bar 5 bar
Voltage -10% +10%
(Compared to the nameplate)
Serviceaccess: adequate spacemustbeleft for
allserviceconnectionsthroughtherearoftheice
maker.
Thismachine isaircooled andsucksairthrough
theleft side panel andblowsairoutthe rear side
ofthetoppanel.Donotinstallthemachinewhere
theleftsideairflowmightbeblocked.Aminimum
clearance of 15 cm is required.
It is important that the machine be installed in a
location where it has enough space around it to
be accessible for service, and minimum of 150
mm be allowed at the left and upper side for air
circulation. Try to avoid hot, dirty and crowded
locations.
NOTE. It is imperativeto do not placeon top
of the machine any sort of goods and leave
theupperlowersopenforproperairexhaust.
D. ELECTRICAL CONNECTIONS
See data plate for current requirements to
determine wire size to be used for electrical
connections.AllSCOTSMANicemakersrequire
a solid earth wire.
AllSCOTSMANicemachinesaresupplied from
the factory completely pre-wired and require
only electrical power connections to the wire
cord provided at the rear of the unit.
Make sure that the ice machine is connected to
its own circuit and individually fused (see data
plate for fuse size).

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Themaximumallowablevoltagevariationshould
not exceed -10% and +10% of the data plate
rating. Low voltage can cause faulty functioning
and may be responsible for serious damage to
the overload switch and motor windings.
NOTE. All external wiring should conform to
national, state and local standards and
regulations.
Check voltage on the line and the ice maker’s
data plate before connecting the unit.
E. WATER SUPPLY AND DRAIN
CONNECTIONS
GENERAL
Whenchoosingthewatersupplyfortheiceflaker
consideration should be given to:
a) Length of run
b) Water clarity and purity
c) Adequate water supply pressure
Sincewateristhemostimportantsingleingredient
in producting ice you cannot emphasize too
much the three items listed above.
Low water pressure, below 1 bar may cause
malfunction of the ice maker unit.
Water containing excessive minerals will tend to
producescalebuild-upontheinteriorpartsofthe
water system while too soft water (with too lo
contents of mineral salts), will produce a very
hard flaker ice.
PLUMBING CONNECTIONS MUST
CONFORM TO ALL APPLICABLE CODES
CONNECT TO POTABLE WATER ONLY
ThemodelTC180hasthepossibilitytohavethe
water connections through the bottom base or
through the rear bottom side of the machine. In
this second case it is necessary to remove the
rear bottom small panel.
WATER SUPPLY
Connect the 3/4" GAS male of the water inlet
fitting,using theflexibletube suppliedtothecold
water supply line with regular plumbing fitting
and a shut-off valve installed in an accessible
position between the water supply line and the
unit.
If water contains a high level of impurities, it is
advisable to consider the installation of an
appropriate water filter or conditioner.
WATER DRAIN
The recommended drain tube is a plastic or
flexible tube with 18 mm (3/4") I.D. which runs to
an open trapped and vented drain. When the
drain is a long run, allow 3 cm pitch per meter
(1/4" pitch per foot).
Installaverticalopenventondrainlinehighpoint
at the unit drain connection to ensure good
draining.
The ideal drain receptacle is a trapped and
vented floor drain.
NOTE.Thewatersupplyandthewaterdrain
must be installed to conform with the local
code. In some case a licensed plumber and/
or a plumbing permit is required.
F. FINAL CHECK LIST
1. Is the unit in a room where ambient
temperatures are within a minimum of 10°C
(50°F) even in winter months?
2. Is there at least a 15 cm (6") clearance
around the unit for proper air circulation?
3. Is the unit level?
4. Have all the electrical and plumbing
connectionsbeen made, andisthewater supply
shut-off valve open?
5. Has the voltage been tested and checked
against the data plate rating?
6. Hasthewatersupplypressurebeenchecked
to ensure a water pressure of at least 1 bar
(14 psi).
7. Check all refrigerant lines and conduit lines
to guard against vibrations and possible failure.
8. Has the owner/user been given the User
Manualandbeeninstructedontheimportanceof
periodic maintenance checks?
9. Has the Manufacturer’s registration card
been filled in properly? Check for correct model
and serial number against the serial plate and
mail the registration card to the factory.
10. Hastheownerbeengiventhenameandthe
phone number of the authorized SCOTSMAN
Service Agency serving him?

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OPERATING INSTRUCTIONS
START UP
Afterhavingcorrectlyinstalledtheicemakerand
completed the plumbing and electrical connec-
tions,performthefollowing“Start-up”procedure.
A. Openthewatersupplylineshutoffvalveand
give power by moving the main switch, on the
power supply line, to the ON position.
The GREEN LED will glow to signal that unit is
under power.
NOTE.Everytimetheunitisputunderpower,
after being kept for sometime in shut-off
conditions(electricallydisconnected)the 2nd
RED LED will blink for 3 minutes (Fig.1).
FIG. 2
FIG. 1
B. Elapsedthe3minutes-standbyperiod-the
unit starts operating with the activation in
sequence of the following assemblies:
GEAR MOTOR
COMPRESSOR
FANMOTOR keptundercontrolbythecondenser
temperature sensor which has its probe within
the condenser fins
with the switching off of the 2nd RED LED
(Fig. 2).
C. Elapsed2or3minutesfromthecompressor
start up, observe that flaker ice begins dropping
off the ice spout to fall into the storage bin.

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NOTE. If, after ten minutes from the
compressor start-up, the evaporating tem-
perature has not dropped down to a value
lower than -1 ° C (30 ° F) the evaporating tem-
perature sensor detects such an abnormal
situation and stops consequently the unit
operation.
Inthiscircustance,the3rdwarningYELLOW
LED will blink (Fig.3).
After having diagnosed and eliminated the
cause of the poor evaporating temperature
(insufficient refrigerant in the system or
inoperativecompressororevaporatorsensor)
itisnecessarytopushtheRE-SETBUTTON
thatprotrudesthroughtheholeofthe control
box cover.
Theunit,beforeresumingthetotaloperation,
willgothroughtheusual3minutesSTAND-
BY period.
OPERATION CHECKS UPON THE UNIT
START UP
D. Remove service panels and if necessary
install the refrigerant service gauges on the
corresponding Service valves to check both the
HI and LO refrigerant pressures.
NOTE. The condenser temperature sensor,
which is located within the condenser fins,
keeps the head (condensing) pressure
between two preset valves.
Incaseofcondensercloggingsuchtoprevent
the proper flow of the cooling air or, in case
the fan motor is out of operation, the
condenser temperature rises and when it
reaches70 ° C(160 ° F)thecondensertempe-
raturesensorshuts-offtheicemakerwiththe
consequent light-up of the 2nd RED
WARNING LIGHT (Fig.4).
After having diagnosed the reason of the
temperatureriseandremoveditscause,itis
necessary to proceed as per the previous
“NOTE”tostart up again theoperationofthe
ice maker.
FIG. 4
FIG. 3

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After this, open the water supply line shutoff
valve to fill up again the float reservoir, the 5th
YELLOW LED goes off while the 2nd RED LED
starts blinking.
After3minutestheunitresumesitstotaloperation
with the immediate start-up of the gear motor
and, 2 seconds later, of the compressor.
F. Check for the correct operation of the
electronic eye for the ice bin level control, by
placing one hand between the sensing “eyes”
located in the ice spout, to interrupt the light
beam.
This interruption will cause an immediate
extinguishing of the 1st RED LED and after
about 6 seconds causes the shutoff of the unit
withthesimultaneouslightingofthe6thYELLOW
LED signalling the full bin situation (Fig.6).
Allowtheresumptionofthelightbeampreviously
interrupted and after about 6 seconds the flaker
will resume - through the 3 minutes STAND-BY
period - the ice making process with the
extinguishing of the YELLOW LED.
E. Check for the correct CUT-OUT and
CUT-IN of the float reservoir water level sen-
sorsbyshutoffthevalveonthewatersupplyline.
This will cause a gradual decrease of the water
levelinthefloatreservoirandassoonasthelevel
gets below the sensors, the flaker stops to ope-
rateandthe5thYELLOWwarningLEDwillglow
to signal the shortage of water (Fig.5).
NOTE. The water level sensor detects the
presence of sufficient water in the float
reservoir and confirms it to the micro
processor by maintaining a low voltage
current flow between the two sensors using
the water as conductor.
WARNING. The use of de-mineralized
water (water with no salt content) having
an electrical conductivity lower than 30
µS, will cause the ability of the water
sensors to vanish with the consequent
CUT-OUTof theflaker operationsand the
glowing of the YELLOW LED of shortage
ofwater,eventhoughthatwaterisindeed
in the reservoir.
FIG. 6
FIG. 5

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H. CHECK OF THE DISPENSING
OPERATING MECHANISM
There are two different versions of dispensing
label;onewithjustICEandCONTINUOUSpush
buttons and a second with ICE/WATER + ICE/
WATER and CONTINUOUS push buttons.
To check for the correct operation of the
dispensing mechanism:
a) Select first the Dispensing Mode by
pushing the proper switch;
b)Placeaglassoracarafeinfrontofthetwo
Optical Dispensing Devices.
c) The dispensing drive motor and/or the
water solenoid valve starts to operate with ice
and/or water discharged through the bottom
plastic spout.
The drive motor and/or the water solenoid valve
remains in operation as per setting dispensing
time unless the glass or carafe is removed.
PushtheCONTINUOUSswitchandcheckagain
for the dispensing mechanism operation as per
steps above.
The drive motor and/or the water solenoid valve
now remains in operation till the glass or carafe
is removed.
I. Ifpreviouslyinstalled,removetherefrigerant
service gauges and re-fit the unit service panels
previously removed.
J. Instruct the owner/user on the general
operation of the ice machine and about the
cleaning and care it requires.
NOTE.TheICELEVELCONTROL(INFRA-
REDSYSTEM)isindependentofthetempe-
raturehowever, the reliability of its detection
canbeaffectedbydirtandscalesediment
whichmaydepositdirectlyonthelightsource
and on the receiver.
To prevent any possible ice maker
malfunction, due to negative affection of the
light detector, it is advisable to follow the
instructions for the periodical cleaning of
the light sensor elementsasdetailed in the
MAINTENANCE AND CLEANING PRO-
CEDURES.
G. SETTING OF THE DISPENSING
SELECTOR
Setting of the dispensing time
It'spossibletomodifythedispensingtimeto5,10
or 15 seconds.
To modify the original setting time (5 seconds):
a) Push and old the 4th switch "CONTI-
NUOUS" for 10 seconds till the first 3 lights start
to blink
b) Push the 1st switch (ICE) for 5 seconds
Push the 2
nd
switch (ICE+WATER) for 10 seconds
Push the 3st switch (WATER) for 15 seconds
Setting of resume mode (default)
To modify the original resume mode (ICE) push
for 5 seconds the desired switch ICE,
ICE+WATER or WATER.