Scotsman DXG 35 User manual

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SCOTSMAN EUROPE - FRIMONT SPA
Via Puccini, 22 - 20010 Pogliano M.se - Milano - Italy
Tel. [phone] (Aut. Sel.)- Telefax [phone]
Direct Line to Service & Parts:
Phone [phone] - Fax [phone]
Website: www.scotsman-ice.com
E-Mail: [email protected]
ISO 9001 - Cert. n. 0080
SERVICE MANUAL
DXG 35
R 134 AVERSION
Cube Dispenser
001000.41 - REV. 04/2015

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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
Installation practice
OPERATING INSTRUCTIONS
Start up
Operational checks
OPERATING PRINCIPLES (How it works)
Freezing cycle
Harvest cycle
Control sequence
Component description
ADJUSTMENT PROCEDURES
Adjustment of the cube size
Wiring diagram
Service diagnosis
MAINTENANCE AND CLEANING INSTRUCTIONS
General
Icemaker
Cleaning instructions of water system
INDICE 2
3
5
5
5
5
6
6
7
8
8
9
9
11
11
13
14-15
16
18
18
18

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Important operating requirements:
Air temperature
Water temperature
Water pressure
Electr. voltage variations
from voltage rating
specified
on nameplate
MIN.
10°C (50°F)
5°C (40°F)
1 bar
-10%
°C
°F
SPECIFICATIONS
ELECTRONIC CUBE DISPENSER
NOTE .Thedailyice-makingcapacityisdirectlyrelatedtothecondenserairinlettemperature,water
temperature and age of the machine.
To keep your DISPENSER at peak performance levels, periodic maintenance checks must be
carried out as indicated on page 18 of this manual.
ice making capacity
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
Kg.
32 27 21 15 10
AIR COOLED MODELS
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
10
21
32
38
WATER COOLED MODELS
°C
o
30
29
28
27
26
25
24
23
22
21
20
19
18
Kg. 10
21
32
38
°C
o
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
32 27 21 15 10
WATER TEMPERATURE
°C
o
MAX.
40°C (100°F)
35°C (90°F)
5 bar
+10%

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Air
Water
Capacity Water req.
the cold store lt/24 HR
SPECIFICATIONS
Basic electr. Amps Watts Nr. of wires Amps fuse
230/50/1 2.1 7 3 x 1.5 m/m210
CUBE DISPENSER
machine specifications
Cubes per harvest: 24 medium
* A 15°C water temperature
Electric power cons.
Kwh per 24 Hr
Cond. unit Finish Comp. HP
Stainless stell 1/4 15 Kg.
Dimensions:
HEIGHT 1695 mm.
WIDTH 380 mm.
DEPTH 515 mm.
WEIGHT 73 Kgs.
140*
465*
400*
300

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A. INTRODUCTION
This manual provides the specifications and the
step-by-stepproceduresfortheinstallation,start-
up and operation, maintenance and cleaning for
the Cube Dispenser.
SCOTSMAN dispenser is quality designed,
engineeredandmanufactured,thoroughlytested
providing the utmost in flexibility to fit the needs
of a particular user.
In has been engineered to our own rigid safety
and performance standards.
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. Call your authorized Distributor 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)Cutandremovetheplasticstripsecuring
the carton box to the skid.
b) Remove the packing nails securing the
carton box to the skid.
c)Cutopenthetopofthecartonandremove
the polystyre protection sheet.
d) Pull out the polystyre posts from the
corners and then remove the carton.
4. Remove the rear panel of the unit and
inspectforanyconcealeddamage.Notifycarrier
ofyourclaimfortheconcealeddamageassteted
in step 2 above.
5. Remove top and upper front panel then
removeallinternalsupportpackingandmasking
tape.
6. Check that refrigerant lines do not rub
againstor touchotherlines orsurfaces, andthat
the fan blade moves freely.
7. Check that the compressor fits snugly onto
all its mounting pads.
8. Use clean damp cloth to wipe the surfaces
inside the storage bin and the outside of the
cabinet.
GENERAL INFORMATION AND INSTALLATION
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. Remove the manufacturer’s registration
card 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 the Factory.
C. LOCATION AND LEVELLING
WARNING.Icecubersdispenserisdesigned
for indoor installation only. Extended
periods of operation at temperatures
exceeding the following limitations will
constitute misuse under the terms of the
Manu-facturer’s Limited Warranty
resulting in LOSS of warranty coverage.
1. Position the unit in the selected permanent
location.
Criteria for selection of location include:
a)Minimumroomtemperature10°C(50°F)
and maximum room temperature 40°C (100°F).
b) Water inlet temperatures: minimum 5°C
(40°F) and maximum 35°C (90°F).
c) Well ventilated location for air cooled
models.
d) Service access: adequate space must
beleftforallserviceconnectionsthroughtherear
of the ice maker. A minimum clearance of 15 cm
(6")mustbeleftatthesidesoftheunitforrouting
cooling air drawn into and exhausted out of the
compartment to maintain proper condensing
operation of air cooled models.
2. Level the unit in both the left to right and
front to rear directions.
D. ELECTRICAL CONNECTIONS
See data plate for current requirements to
determine wire size to be used for electrical
connections.Icedispenserrequiresasolidearth
wire.
It is supplied from the factory completely pre-
wired and require only electrical power
connections to the wire cord provided at rear of
the unit.

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Make sure that the ice machine is connected to
its own circuit and individually fused (see data
plate for fuse size).
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
Whenchoosingthewatersupplyfortheicecuber
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
produce cloudy coloured ice cubes, plus scale
build-up on parts of the water system.
WATER SUPPLY
Connect the 3/4" male fitting of the solenoid
waterinletvalve,usingtheflexibletubesupplied,
tothecoldwatersupplylinewithregularplumbing
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 use 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).
Aventattheunitdrainconnectionisalsorequired
for proper sump drainage.
WATER DRAIN - WATER COOLED MODELS
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.
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? (IMPORTANT)
4. Have all the electrical and plumbing
connectionsbeenmade, andisthe watersupply
shut-off valve open?
5. Has the voltage been tested and checked
against the data plate rating?
6. Has the water supply pressure been
checked to ensure a water pressure of at least
1 bar (14 psi).
7. Checkallrefrigerant linesand conduitlines
to guard against vibrations and possible failure.
8. Havetheboltsholdingthecompressordown
been checked to ensure that the compressor is
snugly fitted onto the mounting pads?
9. Have the bin liner and cabinet been wiped
clean?
10. Has the owner/user been given the User
Manualandbeeninstructedontheimportanceof
periodic maintenance checks?
11. 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.
12. Has the owner been given the name and
the phone number of the authorized Service
Agency serving him?

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G. TYPICAL INSTALLATION
1. Hand shut-off valve
2. Water filter
3. Water supply line (flexible hose)
4. 3/4" male fitting
5. Vented drain
6. Open trapped vented drain
7. Drain fitting
8. Main switch
9. Power line
WARNING. Ice dispenser is not designed for outdoor installation and will not function in
ambient temperatures below 10°C (50°F) or above 40°C (100°F).
This icemaker will malfunction with water temperatures below 5°C (40°F) or above 35°C
(90°F).

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OPERATING INSTRUCTIONS
START UP
After having correctly installed the cubers
dispenser,completedtheplumbingandelectrical
connections,performthefollowing“Start-up”pro-
cedure.
A. Remove top and upper front panel to be
sure that the tapes securing the curtain and the
spray platen to the evaporator chamber have
been removed.
B. Withdraw the condenser air filter then
removetheunitfrontpanelandlocatethecleaning
switch on the control box.
C. Set the cleaning switch in the cleaning
position.Thiswillclosetheelectricalcircuittothe
water inlet valve and to the hot gas valve
D. TurnON themainswitch. Unitwill startup
in charging cycle mode. During this cycle the
components energized are:
WATER INLET SOLENOID VALVE
HOT GAS SOLENOID VALVE
The Water pump and the Fan motor in the air
cooled versions, are also in operation.
E. Let unit stay in charging cycle for about
three/four minutes till water is coming out from
the drain hose, then move the cleaning switch to
the operation position.
NOTE. During the charging cycle, the water
inlet solenoid valve is energized. The water
flowsthroughthevalvetothebacksideofthe
evaporatorplatenandthendowntofillupthe
icemaker sump for the next freezing cycle.
OPERATIONAL CHECKS
F. The unit now starts its first freezing cycle
with the following components in operation:
COMPRESSOR
WATER PUMP
FAN MOTOR in air cooled version
G. Check to see through the ice discharge
openingthatthespraysystemiscorrectlyseated
and that the water jets uniformely reach the
interioroftheinvertedcupmolds;alsomakesure
thattheplasticcurtainishangingfreelyandthere
is not excessive water spilling through it.
H. The ice making process takes place
thereby, with the water sprayed into the molds
that gets gradually refrigerated by the heat
exchanged with the refrigerant flowing into the
evaporator serpentine.
I. Whentheevaporatortemperaturereaches
apresetvaluetheevaporatorthermostatorcube
size control changes its contacts; the freezing
cycle ends and starts the defrost or harvest
cycle.
Freezing time will range between 20 and 22
minutes in a 21°C ambient temperature. Longer
timefortemperatureabove,shorterwhenbelow.
Average complete cycle range is about 23 to 25
minutes.
J. Check, during the first defrost/harvest
cycle, that the incoming water flows correctly
into the sump in order to re-fill it and the surplus
overflows through the overflow drain tube.
K. Check the texture of ice cubes just
released.Rightsizemusthaveasmalldepression
(about 5-6 mm) in their crown.
If not, wait for the second defrost/harvest cycle
before performing any adjustment.
L. Ifrequired,thelengthofthefreezingcycle
can be modified by turning the knob of the cube
size control or evaporator thermostat located in
front of the control box until the desired size is
achieved.
If the ice cubes are shallow and cloudy, it is
possible that the ice maker runs short of water
duringtheendofthefreezingcycleor,thequality
of the supplied water requires the use of an
appropriate water filter or conditioner.
M. During the defrost or harvest cycle hold a
handful of ice cubes against the bulb of the
storagebinthermostat;theicemakerswitchOFF
in about one-two minutes.
Takeouttheicefromthestoragebinthermostat.
The ice maker should restart automatically in
three-four minutes.
NOTE. The bin thermostat is factory set at
1 ° C (35 ° F) OUT and 4 ° C (39 ° F) IN.
N. Re-fit dispenser panels then instruct the
owner/user on the general operation, and about
the cleaning require.

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In the SCOTSMAN ice cubes dispenser the water

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