Scotsman EC 46 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
EC 46
EC 56
EC 86
Cubers
with storage
MS 1000.94 REV. 10/2008

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INDICE 2
3
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9
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10
10
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12
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17
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26
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Table of contents page
Specifications EC 46
Specifications EC 56
Specifications EC 86
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
Electrical sequence
Components description
ADJUSTMENT, REMOVAL AND REPLACEMENT PROCEDURES
Adjustment of the cube size
Wiring diagram
Service diagnosis
MAINTENANCE AND CLEANING INSTRUCTIONS
General
Icemaker
Clean - Replace of air condenser filter
Cleaning instructions of water system
20
21
24

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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
5°C
1 bar
-10%
°C
°F
SPECIFICATIONS
CUBER MODEL EC 46
NOTE .Withtheunitin"built-in"conditions,theiceproductionisgraduallyreducedinrespecttothe
levels shown in the graf, up to a maximum of 10% at room temperatures higher than 32 ° C.
The daily ice-making capacity is directly related to the condenser air inlet temperature, water
temperature conditions of the condenser air filter and age of the machine.
TokeepyourSCOTSMANCUBERatpeakperformancelevels,periodicmaintenancechecksmust
be carried out as indicated on Maintenance and Cleaning section of this manual.
MAX.
40°C
35°C
5 bar
+10%
ice making capacity
25
24
23
22
21
20
19
18
17
16
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
°C
o
25
24
23
22
21
20
19
18
17
16
Kg.
32 27 21 15 10
10
21
32
38
°C
o
°C
o
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.

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Stainless steel 1/4 9 Kg.
Start . Electric power cons.
Amps Kwh per 24 Hr
Model Cond. unit Finish Comp. HP
SPECIFICATIONS
Basic electr. Amps Watts Nr. of wires Amps fuse
230/50/1 2.1 12 400 3 x 1.5 mm210
8
6
EC 46 - CUBER
machine specifications
Cubes per harvest: 18 medium
* A 15°C water temperature
Dimensions:
HEIGHT 645 mm.
WIDTH 386 mm.
DEPTH 600 mm.
WEIGHT 42 Kgs.
77*
350*
Bin Water req.
Capacity lt/24 HR
EC 46 AS 6 Air
EC 46 WS 6 Water

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MIN.
10°C
5°C
1 bar
-10%
Important operating requirements:
Air temperature
Water temperature
Water pressure
Electr. voltage variations
from voltage rating
specified
on nameplate
SPECIFICATIONS
CUBER MODEL EC 56
MAX.
40°C
35°C
5 bar
+10%
ice making capacity
NOTE .Withtheunitin"built-in"conditions,theiceproductionisgraduallyreducedinrespecttothe
levels shown in the graf, up to a maximum of 10% at room temperatures higher than 32 ° C.
The daily ice-making capacity is directly related to the condenser air inlet temperature, water
temperature conditions of the condenser air filter and age of the machine.
TokeepyourSCOTSMANCUBERatpeakperformancelevels,periodicmaintenancechecksmust
be carried out as indicated on Maintenance and Cleaning section of this manual.
32
30
28
26
24
22
20
18
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
°C
o
33
32
31
30
29
28
27
26
25
24
23
Kg.
10
21
32
38
°C
o
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
32 27 21 15 10
WATER TEMPERATURE
°C
o

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Stainless steel 1/4 12.5 Kg.
Start . Electric power cons.
Amps Kwh per 24 Hr
Model Cond. unit Finish Comp. HP
SPECIFICATIONS
Basic electr. Amps Watts Nr. of wires Amps fuse
230/50/1 2.1 12 400 3 x 1.5 mm210
090 **
270*
EC 56 - CUBER
machine specifications
Cubes per harvest: 24 medium
* A 15°C water temperature
Dimensions:
HEIGHT 695 mm.
WIDTH 386 mm.
DEPTH 600 mm.
WEIGHT 45 Kgs.
7.6
7
Bin Water req.
Capacity lt/24 HR
EC 56 AS 6 Air
EC 56 WS 6 Water

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MIN.
10°C
5°C
1 bar
-10%
Important operating requirements:
Air temperature
Water temperature
Water pressure
Electr. voltage variations
from voltage rating
specified
on nameplate
SPECIFICATIONS
CUBER MODEL EC 86
MAX.
40°C
35°C
5 bar
+10%
ice making capacity
NOTE .Withtheunitin"built-in"conditions,theiceproductionisgraduallyreducedinrespecttothe
levels shown in the graf, up to a maximum of 10% at room temperatures higher than 32 ° C.
The daily ice-making capacity is directly related to the condenser air inlet temperature, water
temperature conditions of the condenser air filter and age of the machine.
TokeepyourSCOTSMANCUBERatpeakperformancelevels,periodicmaintenancechecksmust
be carried out as indicated on Maintenance and Cleaning section of this manual.
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
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
°C
o
39
38
37
36
35
34
33
32
31
30
29
Kg. 10
21
32
38
°C
o
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
32 27 21 15 10
WATER TEMPERATURE
°C
o

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Stainless steel 3/8 19 Kg.
Start . Electric power cons.
Amps Kwh per 24 Hr
Model Cond. unit Finish Comp. HP
SPECIFICATIONS
Basic electr. Amps Watts Nr. of wires Amps fuse
230/50/1 3.3 18 480 3 x 1.5 mm210
0143 **
500*
EC 86 - CUBER
machine specifications
Cubes per harvest: 24 medium
* A 15°C water temperature
Dimensions:
HEIGHT (without legs) 795 mm.
HEIGHT (with legs) 915 mm.
WIDTH 530 mm.
DEPTH 600 mm.
WEIGHT 45 Kgs.
8.9
8.4
Bin Water req.
Capacity lt/24 HR
EC 86 AS 6 Air
EC 86 WS 6 Water

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8. Use clean damp cloth to wipe the surfaces
inside the storage bin and the 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. 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 Frimont factory.
11. If necessary, on model EC 56, replace the
fourstandardlegswiththetalleronessuppliedin
the machine and adjust them to level the unit.
C. LOCATION AND LEVELLING
WARNING.This Ice Cuber is designed for
indoorinstallationonly.Extendedperiods
of operation at temperatures exceeding
the following limitations will constitute
misuseunderthetermsoftheSCOTSMAN
Manufacturer’sLimitedWarrantyresulting
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.AllSCOTSMAN icemakersrequire
a solid earth wire.
A. INTRODUCTION
This manual provides the specifications and the
step-by-stepproceduresfortheinstallation,start-
up and operation, maintenance and cleaning for
the SCOTSMAN EC series icemakers.
These Cubers are quality designed, engineered
and manufactured.
Their ice making systems are thoroughly tested
providing the utmost in flexibility to fit the needs
of a particular user.
These icemakers have 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. CallyourauthorizedSCOTSMANDistributor
or Dealer for proper installation.
2. Visually inspect the exterior of the packing
and skid. Any severe damage noted should be
reported to the delivering carrier and a concealed
damage claim form filled in subjet to inspection of
thecontentswiththecarrier’srepresentativepresent.
3. a)Cutandremovetheplasticstripsecuring
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. Remove the front panel of the unit and
inspectforanyconcealeddamage.Notifycarrier
ofyourclaimfortheconcealeddamageassteted
in step 2 above.
5. Check that refrigerant lines do not rub
againstor touch other lines or surfaces, and that
the fan blade moves freely.
6. Check that the compressor fits snugly onto
all its mounting pads.
7. Remove all internal support packing and
masking tape.
GENERAL INFORMATION AND INSTALLATION

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All SCOTSMAN ice machines are supplied from
thefactorycompletelypre-wiredandrequireonly
electrical power connections to the wire cord
provided at 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).
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
Air Cooled Versions
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 an appropriate
water filter or conditioner.
Water Cooled Versions
OnWaterCooledversionthewaterinletsolenoid
valve has two separate outlets one for the
condenser and the second for the production of
ice.
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.
WATER DRAIN - WATER COOLED MODELS
Connect the 3/4" male fitting of the condenser
water drain, utilizing a second flexible hose, to
the 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.
The EC series Ice Cubers can pump out water
up to 1.5 m rise
or to 30 m on horizontal length.
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
connections been made, and is the water
supply shut-off valve open?
POWER
WATER INLET
WATER DRAIN
HAND DISCONNECT
SWITCH
WATER
FILTER
WATER
VALVE
POWER
WATER INLET
WATER DRAIN
HAND DISCONNECT
SWITCH
WATER
FILTER
WATER
VALVE

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G. INSTALLATION PRACTICE
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. This icemaker 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).
1
23
4
5
6
7
8
9
5. Hasthevoltagebeentestedandchecked
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. Check all refrigerant lines and conduit
lines 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. 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
connections,performthefollowing“Start-up”pro-
cedure.
A. Withdraw the condenser air filter then
removetheunitfrontpanelandlocatethecleaning
switch on the control box.
B. Set the cleaning switch in the cleaning
position.Thiswillclosetheelectricalcircuittothe
water inlet valve and to the hot gas valve
C. SwitchONthepowerlinedisconnectswitch
and push the green button switch. Unit will start
up 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.
D. 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
E. The unit now starts its first freezing cycle
with the following components in operation:
COMPRESSOR
WATER PUMP
FAN MOTOR in air cooled version
F. 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.
G. 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.
H. Whentheevaporatortemperaturereaches
apresetvaluetheevaporatorthermostatorcube
size control changes its contacts; the freezing
cycleendsandstartsthedefrostorharvestcycle.
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.
I. 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.
J. AssoonasthewaterintotheSealedWater
Reservoir reaches the maximum level, the two
metal pins close the electrical contact through
the water, transmitting a low voltage current to
the PC Board.
The PC Board energises the Water Drain Pump
for 8 seconds pumping out most of the water
contained into the Sealed Water Reservoir.
K. Checkthetextureoficecubesjustreleased.
Right size must have a small depression (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-fittheunitfrontpaneltheninstructthe
owner/user on the general operation of the ice
machine and about the cleaning and care it
requires.

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COMPONENTS
The components of the Pump Out Water Drain
System are
• Sealed water tank
• PC Board & Sensor
• Sealed Water Pump
• Check Valve
OPERATION
Allwater coming from the overflow, andfromthe
melted ice is collected inside the Sealed Water
Reservoir.
As soon as the water into the Sealed Water
Reservoir reaches the maximum level, the two
metal pins close the electrical contact through
the water, transmitting a low voltage current to
the PC Board.
The PC Board activates the Water Drain
Pump for 8 seconds pumping out most of
PWD SYSTEM
the water contained into the Sealed Water
Reservoir.
The water can be pumped out up to 1.5 m rise
or
to 30 m on horizontal length.
POWER
WATER INLET
WATER DRAIN
HAND DISCONNECT
SWITCH
WATER
FILTER
WATER
VALVE
POWER
WATER INLET
WATER DRAIN
HAND DISCONNECT
SWITCH
WATER
FILTER
WATER
VALVE

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A Check Valve, located on the water drain hose,
prevents the coming back of the discharged
water.
SCHEMATIC SYSTEM
Storage bin
Overflow drain
tube
Storage bin
drain tube Water tank
inlet fitting
Sealed
water
tank Water
pump
Check
valve
Vented tube
Water
level
sensors
Drain out
Drain fitting

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COMPONENTS DESCRIPTION
A. WATER PUMP
Thewaterpumpoperatescontinuallythroughout
the freezing cycle.
Thepump primesthewater from thesumpto the
spray system and through the spray nozzles
sprays it into the inverted cup molds to be frozen
into crystal clear ice cubes.
B. WATER INLET SOLENOID VALVE -
3/4 MALE FITTING
The water inlet solenoid valve is energized only
during the defrost cycle.
When energized it allows a metered amount of
incomingwatertoflowovertheevaporatorcavity
to assist the hot gas in defrosting the ice cubes.
The water running over the evaporator cavity
dropsbygravity,throughthedribblerholesofthe
platen, into the sump.
Onwatercooledversionsthewaterinletsolenoid
valve has one inlet and two outlets with two
separate solenoids energized the first (ice
productioon)bythecontacts3-2oftheevaporator
thermostat and the second (water cooled
condenser) by a specific hi pressure control.
C. HOT GAS SOLENOID VALVE
The hot gas solenoid valve consists basically in
two parts: the valve body and the valve coil.
Locatedonthehotgasline,thisvalveisenergized
by the contacts 3-2 of the evaporator thermostat
during the defrost cycle.
During the defrost cycle the hot gas valve coil is
activated so to attract the hot gas valve piston in
order to give way to the hot gas discharged from
compressor to flow directly into the evaporator
serpentine to defrost the formed ice cubes.
D. BIN THERMOSTAT
The bin thermostat control body is located in the
front of control box behind the front louvered
panel.
The thermostat sensing tube is located into a
bulbholder on the sidewall of the icestoragebin
where it automatically shuts the icemaker OFF
when in contact with the ice and re-starts the
icemaker when the ice is removed. Factory
settings are 1°C (35°F) OUT and 4°C (39°F) IN.
E. CUBE SIZE CONTROL (EVAPORATOR
THERMOSTAT)
The cube size control (evaporator thermostat)
body is located in the front of control box behind
the front louvered panel; it’s basically a reverse
acting temperature control which closes the
contacts 3-2 when its temperature decreases
and closes the opposite contacts 3-4 when the
temperature rises.
OPERATION - ELECTRICAL SEQUENCE
The following charts illustrate which switches
and components are ON or OFF during the two
phases of the icemaking cycle.
Refer to the wiring diagram for reference.
FREEZING CYCLE
Electrical components ON OFF
Compressor............................................•
Water Pump ...........................................•
Fan Motor (Air cooled only)....................•
Hot Gas Valve ........................................ •
Inlet Water Valve.................................... •
Electrical Controls CLOSE OPEN
Evaporator Thermostat (contacts 3-4) ...•
Evaporator Thermostat (contacts 3-2) ... •
Bin Thermostat.......................................•
HARVEST CYCLE
Electrical components ON OFF
Compressor............................................•
Water Pump ........................................... •
Fan Motor (Air cooled only).................... •
Hot Gas Valve ........................................•
Inlet Water Valve....................................•
Electrical Controls CLOSE OPEN
Evaporator Thermostat (contacts 3-4) ... •
Evaporator Thermostat (contacts 3-2) ...•
Bin Thermostat.......................................•
Freeze Cycle
Average Discharge Pressure
A/C: 7 ÷11 bars (100÷155 psig)
Average Discharge Pressure
W/C: 8.5÷10bars(120÷140psig)
Suction Pressure
End Freeze Cycle: 0 ÷0.1 bar (0 ÷1.5 psig)
REFRIGERANT METERING DEVICE:
capillary tube
REFRIGERANT CHARGE (R 134 A)
Model Air cooled Water cooled
EC 46 260 gr ( 9.5 oz.) 250 gr (9.0 oz.)
EC 56 260 gr ( 9.5 oz.) 250 gr (9.0 oz.)
EC 86 280 gr (10.0 oz.) 250 gr (9.0 oz.)

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The thermostat sensing bulb is located into a
plastic tube (bulb holder) secured by two clips
directly to the evaporator serpentine.
Thiscontroldeterminesthelengthofthefreezing
cycleand correspondingly the size of thecubes.
A lower setting will produce a larger cube
(oversize) while a higher setting a smaller cuber
(shallow size).
When closed on contacts 3-2 it activates the
defrost or harvest cycle components.
The cube size control is set up in the factory
(knob in the black dot position) and doesn't
require any adjustment when the ambient
temperature remains between 15 and 30°C
(60 and 90°F).
F. FAN MOTOR (Air cooled version)
Thefanmotoriselectricallyconnectedinparallel
to the water pump and it operates continuously
onlyduringthefreezingcyclekeepingtheproper
head pressure by circulating air through the
condenser fins.
G. COMPRESSOR
The hermetic compressor is the heart of the
refrigerant system and it is used to circulate and
retrieve the refrigerant throughout the entire
system. It compresses the low pressure
refrigerant vapor causing its temperature to rise
and become high pressure hot vapor (hot gas)
which is then released through the discharge
valve.
H. WATER SPRAY SYSTEM
Through its nozzles it sprays the water in each
individual cup to be frozen into ice.
I. CLEANING SWITCH
Located on the bottom side of the control box is
used to energize the water inlet and the hot gas
valvessotochargethewaterintothesumpofthe
machine when neaded.
J. HIPRESSURECONTROL(Watercooled
version)
Usedonlyonthewatercooledversionsitoperates
tokeepbetween8.5and10bars(120÷140psig)
thehi-sideordischargepressureoftherefrigerant
system by energizing the coil of the water inlet
solenoidvalvethatcontrolthecoolingwaterflow
to the condenser.
K. GREENMASTERSWITCHPUSHBUTTON
Located in the front of the machine it’s used to
switchONandOFFtheunitbypushingitsgreen
pushbutton.WhenON,itsgreenlightisONaswell.
L. RED ALARM/RE-SET PUSH BUTTON
Locatedinthefrontofthemachine(justbeside
the Master Switch) it works in conjuction with
the Cleaning Remind Board and it’s activated
when:
• Consensing temperature is higher then 70°C
(aircooledversion)-ONsteadywithmachine
in OFF mode
• Condensing temperature is higher then 60°C
(water cooled version) - ON steady with
machine in OFF mode
• Condenser sensor out of order - Blinking
twiceandrepeatwithmachineinOFFmode
• Condenser air filter need to be cleaned - ON
steady with machine in ON mode
• Water system need to be cleaned - Slow
blinking with machine in ON mode.
On the first two cases it’s possible to Re-Set the
operation of the machine pushing and hold the
Red Alarm Re-Set Button by 5" till the Red Light
is OFF.
On the third case, it’s necessary first to replace
the condenser sensor then, push and hold for 5"
the Red Re-Set Button.
M. CLEANING REMIND AND PWD PC BOARD
Located on the front left side of the machine, it
works in conjuction with the condenser sensor
and the Red Alarm Re-Set Push Button.
It is used to energise the Water Drain Pump any
time the level of the water into the Sealed water
Reservoir reaches the upper metal pins (low
powerelectricalcircuitclosedthroughthewater).
The water pump is kept energised by the PWD
PC Board for 8 seconds.
It consists of a Printed Circuit Board with a step
down transformer (230V - 12V), a relay, a Dip
Switch with two keys, a Jumper for the set up of
the Cut OFF/Alarm condensing temperature
(70°C - jumper OUT - for air cooled version and
60°C - jumper IN - for water cooled version), a
green four contacts connector for power IN and
OUT, a Red socket for the Water Level Sensor,
a Black socket for the Condenser Sensor and a
White socket for the Red Alarm Re-Set Push
Button.
The main function of this PC Board is to switch
OFF the machine when the condensing tempe-
rature is higher of its setting value or signal out
the need for the cleaning of the condenser air
filter (air cooled only) or of the water system.
WATER LEVEL
SENSOR
CONDENSER
SENSOR
RESET
BUTTON
CONNECTOR
DIP SWITCH FOR CLEANING
REMIND SETTING
POWER IN & OUT
CONNECTOR
TRANSFORMER
JUMPER FOR 70°C - OUT - OR 60°C
-IN - CONDENSING TEMPERATURE

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The time between the signal out for the cleaning
ofthewatersystemcanbemodifiedaccordingto
the setting of the two Dip Switches as below:
TIME 1 2
1 MONTH ON ON
3 MONTHS OFF ON
6 MONTHS ON OFF
1 YEAR OFF OFF
Oncecleanedthewatersystem,it’snecessaryto
cancel the time stored into the PC Board by
pushing and hold for more then 20" the Red
Alarm Re-Set Button till it starts to blink.
ThisPCBoardisalsousedtoenergisetheWater
Pump to pump out the collected water inside the
sealed water tank.
Incasethewaterlevelsensortransmitthesignal
to the PC Board for more then 5 minutes
continuously the PC Board trip OFF the entire
machine lighting ON the Red Alarm light that
starts to blink fast (0.5" ON - 0.5" OFF).
WARNING:toassurethecorrectoperation
oftheWaterlevelsensors,thewatermust
have a minimal electrical of 10 µs.
N. SEALED WATER RESERVOIR
Located on the bottom side of the unit, it is used
to collect all water coming from the:
• Overflow
• Water Drain Valve
• Storage bin
On its top cover are secured two metal pins
(WaterLevel Sensor) connected to the PWD PC
Board.
O. WATER DRAIN PUMP
Placed beside the Sealed Water Reservoir is
used to pump out the water contained into the
tank. It is energised, by the PWD PC Board, for
just few seconds.
P. CHECK VALVE
Placedonthedischargehoseofthewaterpump,
it prevents the coming back of the pumped out
water.
Q. CONDENSER AIR FILTER
(Air cooled version)
Located in front of the air cooled condenser can
beremovedbywithdrawingitthroughtheopening
of the front panel for cleaning or replacing.
A lower plastic guide, installed inside the unit, is
usedfor the correct slidingandlocation of the air
filter.
R. CONDENSER SENSOR
The condenser temperature sensor probe,
located within the condenser fins (air cooled
version) or in contact with the tube coil (water
cooled version) detects the condenser tempe-
raturevariationsandsignalsthembysupplying
current, at low voltage, to the P.C. BOARD.
In case the condenser temperature rises and
reaches70°C(160°F) -onaircooledmodels-or
60°C (140°F) - on water cooled models - the
current arriving to the micro processor is such to
causeanimmediateandtotalstopofthemachine
operation.

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