Nordcap SP 125 L User manual

User Manual
Electronic Modular Flaker SP 125 L / W
[Art. 41321100001] / [Art. 41321100002]
2020-01

Page 3
SPECIFICATIONS
ice making capacity
ELECTRONIC MODULAR FLAKER MODEL SPN 125
Important operating requirements:
MIN MAX
• Air temperature 10°C (50°F) 40°C (100°F)
• Water temperature 5°C (40°F) 35°C (90°F)
• Water pressure 1 bar (14 psi) 5 bars (70 psi)
• Electr. voltage
• variations from voltage
• rating specified
• on nameplate -10% +10%
NOTE. The daily ice-making capacity is directly related to the condenser air inlet temperature, water
temperature and age of the machine.
To keep your S IMA G FLAKER at peak performance levels, periodic maintenance checks
must be carried out as indicated on maintenance section of this manual.
Kg.
32 °C27 21 15 10
°C
10
21
o
o
32
38
120
115
110
105
100
95
90
85
80
Kg.
32 °C27 21 15 10
°C
10
21
o
o
32
38
120
115
110
105
100
95
90
85
80
ICE PRODUCED PER 24 HRS.
AIR COOLED MODELS
WATER TEMPERATURE
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
WATER COOLED MODELS
WATER TEMPERATURE
AMBIENT TEMPERATURE
2

Page 4
SPN 125 AS Air 120*
SPN 125 WS Water 480*
Start Electric power cons.
Amps Kwh per 24 HR
SPECIFICATIONS
Water req.
lt/24 HR
Model Finish
Cond. unit Comp. HP
* A 15°C water temperature
S. Steel 3/8
Basic electr. Amps Watts Nr. of wires Amps fuse
230/50/1 3.2 17 500 11 3 x 1.5 mm210
SPN 125 - MACHINE SPECIFICATIONS (R134A version)
Dimensions:
HEIGHT (less legs) 525 mm.
HEIGHT (with legs) 542 mm.
WIDTH 563 mm.
DEPTH 536 mm.
WEIGHT 49 Kg.
3

Page 21
OPERATING INSTRUCTIONS
START UP
After having correctly installed the ice maker and
completed the plumbing and electrical
connections, perform the following “Start-up” pro-
cedure.
A. Open the water supply line shutoff valve
and put the unit under electrical power by moving
the main switch, on the power supply line, to the
ON position.
The first LED - GREEN - will glow to signal that
unit is under power.
NOTE. Every time the unit is put under power,
after being kept for sometime in shut-off
conditions (electrically disconnected) the
RED LED will blink for 3 minutes (60' on MF
66 only) after which the unit will start up with
the immediate operation of the gear motor
assembly and, after few seconds, of the
compressor (Fig.1).
B. Elapsed the stand by period the unit starts
operating with the activation in sequence of the
following assemblies:
GEAR MOTOR/S
COMPRESSOR
FAN MOTOR/S (if unit is an air cooled version)
kept under control by the condenser temperatu-
re sensor which has its probe within the condenser
fins (Fig.2).
C. After 2 or 3 minutes from the compressor
start up, observe that flaker ice begins dropping
off the ice spout to fall through the ice chute into
the storage bin.
NOTE. The first ice bits that drop into the ice
storage bin are not so hard as the evaporating
temperature has not yet reached the correct
operating value. It is necessary to allow the
ice - just made - to cure itself and wait for
about ten minutes for the evaporating tem-
perature to reach the correct value so to
make more hard bits of ice.
FIG. 1
2
1
L
N
COMPRESSOR
9
10
11
12
13
3
4
5
6
7
8
CONTACTOR COIL
GEAR MOTOR
FAN MOTOR
ELECTRONIC
CARD
RELAYS
TRIAC
RESET
S E N S O R S
DATA PROCESSOR
WATER
LEVEL
GEAR MOTOR ROTATION
CONDENSER TEMP.
EVAPORATOR TEMP.
ICE LEVEL CONTROL
TRANSF.
T>1°C
11
10
9
1
2
L
N
8
7
6
5
4
3
13
12
4

Page 22
FIG. 3
FIG. 2
2
1
L
N
COMPRESSOR
9
10
11
12
13
3
4
5
6
7
8
CONTACTOR COIL
GEAR MOTOR
FAN MOTOR
ELECTRONIC
CARD
RELAYS
TRIAC
RESET
S E N S O R S
WATER
LEVEL
GEAR MOTOR ROTATION
CONDENSER TEMP.
EVAPORATOR TEMP.
ICE LEVEL CONTROL
TRANSF.
T 40÷50°C
DATA PROCESSOR
2
1
L
N
COMPRESSOR
9
10
11
12
13
3
4
5
6
7
8
CONTACTOR COIL
GEAR MOTOR
FAN MOTOR
ELECTRONIC
CARD
RELAYS
TRIAC
RESET
S E N S O R S
DATA PROCESSOR
WATER
LEVEL
GEAR MOTOR ROTATION
CONDENSER TEMP.
EVAPORATOR TEMP.
ICE LEVEL CONTROL
TRANSF.
T>-1°C
11
10
9
1
2
L
N
8
7
6
5
4
3
10
9
1
2
L
N
8
7
6
5
4
3
12
11
13
13
12
5

Page 23
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 (first the compressor and 3' later
the gear reducer).
In this circustance, the 5th warning YELLOW
LED will blink.
The machine will remain in OFF mode for
one hour then it will restart automatically.
In case the unit trips OFF again in alarm for
3 times in 3 hours, the machine SHUTS OFF
DEFINITIVELY.
After having diagnosed and eliminated the
cause of the too hi evaporating temperature
(insufficient refrigerant in the system or
compressor not running) it is necessary to
unplug and plug in again to restart the
machine. The unit, before resuming the
normal operation, will go through the usual
3 minutes STAND-BY period.
OPERATION CHECKS UPON THE UNIT
START UP
D. Remove front service panel and, if
necessary, install the refrigerant service gauges
on the corresponding service valves to check
both the HI and LO refrigerant pressures.
NOTE. On air cooled models, the condenser
temperature sensor, which is located within
the condenser fins, keeps the head
(condensing) pressure between preset
values.
In the event of condenser clogged - such to
prevent the proper flow of the cooling air - or,
in case the fan motor is out of operation, the
condenser temperature rises and when it
reaches 70
°
C (160
°
F) for air cooled version -
and 60
°
C (140
°
F) - for water cooled version -
the condenser temperature sensor shuts-off
the ice maker (first the compressor and 3'
later the gear reducer) with the consequent
light-up of the RED WARNING LIGHT (Fig.3).
The machine will remain in OFF mode for
one hour then it will restart automatically.
In case the unit trips OFF again in alarm for
3 times in 3 hours, the machine SHUTS OFF
DEFINITIVELY.
After having diagnosed the reason of the
temperature rise and removed its cause, it is
necessary to proceed as per the previous
“NOTE” to start up again the operation of the
ice maker.
E. Check for the correct CUT-OUT and
CUT-IN of the water level sensor by first shutting
closed the water shutoff valve on the water
supply line.
FIG. 4
2
1
L
N
COMPRESSOR
9
10
11
12
13
3
4
5
6
7
8
CONTACTOR COIL
GEAR MOTOR
FAN MOTOR
ELECTRONIC
CARD
RELAYS
TRIAC
RESET
S E N S O R S
WATER
LEVEL
GEAR MOTOR ROTATION
CONDENSER TEMP.
EVAPORATOR TEMP.
ICE LEVEL CONTROL
TRANSF.
T>75°C
DATA PROCESSOR
11
10
9
1
2
L
N
8
7
6
5
4
3
13
12
6

Page 24
After 3 minutes the unit resumes its total operation
with the immediate start-up of the gear motor
and, few seconds later, of the compressor.
F. Check for the correct operation of the
electronic eye (one per each ice chute on model
1205) of the optical ice level control, by closing
the bottom opening of the vertical ice chute.
Wait the built up of the ice into the ice chute till it
cuts the light beam of the sensing "eyes".
This interruption will cause an immediate blinking
of the Bin Full YELLOW LED located on the front
of the P.C. Board and after about 10 seconds
causes the shutoff of the unit (compressor first
and 3' later the gear reducer) with the
simultaneous lighting (steady) of the Same LED
signalling the full bin situation (Fig.5).
Discharge the ice from the ice chute so to resume
the light beam previously interrupted (YELLOW
LED blinking fast) and after about 10 seconds the
flaker will re-start - through the 3 minutes STAND-
BY period - with the extinguishing of the YELLOW
LED.
This will cause a gradual decrease of the water
level in the float reservoir and as soon as the
level gets below the two vertical metal pins, the
flaker stops to operate (compressor first and 3'
later the gear reducer) and the YELLOW warning
LED will glow to signal the shortage of water
(Fig. 4)
NOTE. The water level sensor detects the
presence of water in the float reservoir and
confirms it to the micro processor by
maintaining a low voltage current flow
between the two metal pins 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 break with the consequent
CUT-OUT of the flaker and the glowing of
the YELLOW LED of water shortage, even
with water in the reservoir.
Opening the water supply line shutoff valve to fill
up again the float reservoir, the YELLOW LED
goes off while the RED LED starts blinking.
FIG. 5
2
1
L
N
COMPRESSOR
9
10
11
12
13
3
4
5
6
7
8
CONTACTOR COIL
GEAR MOTOR
FAN MOTOR
ELECTRONIC
CARD
RELAYS
TRIAC
RESET
S E N S O R S
WATER
LEVEL
GEAR MOTOR ROTATION
CONDENSER TEMP.
EVAPORATOR TEMP.
ICE LEVEL CONTROL
TRANSF.
DATA PROCESSOR
L
N
11
10
9
1
2
7
8
6
5
4
3
12
13
7

Page 25
NOTE. The ICE LEVEL CONTROL
(INFRARED SYSTEM) is independent of the
temperature however, the reliability of its
detection can be affected by external light
radiations or by any sort of dirt and scale
sediment which may deposit directly on the
light source and on the receiver.
To prevent any possible ice maker
malfunction, it is advisable to locate the unit
where it can't be reached by any direct light
beam or light radiation and to follow the
instructions for the periodical cleaning of the
light sensor elements as detailed in the
MAINTENANCE AND CLEANING PROCE-
DURES.
M. If previously installed, remove the refrigerant
service gauges and re-fit the unit service panels
previously removed.
N. Instruct the owner/user on the general
operation of the ice machine and about the
cleaning and care it requires.
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Page 26
WATER CIRCUIT
The water enter in the machine through the
water inlet fitting which incorporates a strainer -
located at the rear side of the cabinet - then it
goes to the water reservoir flowing through a
float valve.
NOTE. The presence of the water in the float
reservoir is detected by a system of two
sensors which operates in conjunction with
the P.C. Board. The two sensors use the
water as a conductor to maintain a low
voltage current flow between them. In case
the water used is very soft (de-mineralized)
or the float reservoir gets empty the current
flow between the sensors become so weak
or is no longer maintained that, as
consequence, the P.C. Board shutoff the
flaker operation with the simultaneous
glowing of the YELLOW LED signalling
“Shortage of water”.
The float reservoir is positioned at the side of the
freezing at such an height to be able to maintain
a constant water level. The water flows from the
reservoir into the bottom inlet of the freezer to
sorround the stainless steel auger which is
vertically fitted in the center of the freezer.
In the freezer the incoming water gets chilled into
soft (slush) ice which is moved upward by the
rotating action of the auger. The auger rotates
counter-clockwise within the freezer powered by
a direct drive gear motor and carries the ice
upward along the refrigerated freezer inner walls
and by doing so the ice gets progressively thicker
and harder.
The ice, being costantly lifted up, meet the teeth
of the ice breaker which is fitted on the top end of
the auger, where it gets compacted, cracked and
forced to change from vertical into horizontal
motion to be discharged out, through the ice
spout and chute, into the storage bin.
PRINCIPLE OF OPERATION
FLOAT TANK
FLOAT VALVE
FREEZER
SPN 1205
FREEZER WATER
FEED LINE
FREEZER
FLOAT VALVE
ICE SPOUT
FLOAT TANK
SPN 125-255
FREEZER
FLOAT TANK
FLOAT VALVE
SPN 405-605
WATER INLET LINE
WATER INLET LINE
ICE SPOUT
FREEZER
WATER
FEED LINE
WATER INLET LINE
FREEZER
WATER
FEED LINE
ICE SPOUT
9

Page 27
By running the ice maker, i.e. by putting the unit
under power, starts the automatic and continuous
icemaking process which would not stop until the
ice storage bin gets filled-up to the level of the
control “eyes” located on the ice chute. As the ice
level raises to interrupt the light beam running
between the two infrared leds (one or both on
model MF 66), the unit stops after six seconds
(compressor first and 3' later the gear reducer),
with the simulteneous glowing of the YELLOW
LED signalling the “Full Bin” situation.
NOTE. The interruption of the light beam
between the two light sensors is immediately
signalled by the blinking of the BIN FULL
YELLOW LED located on the front of the
P.C. Board.
After about 10" of steady interruption of the
light beam the unit stops and the “Full Bin”
YELLOW LED glows steady.
The ten seconds of delay prevent the unit
from stopping for any undue reason like the
momentarily interruption of the light beam
caused by the flakes that slides along the ice
spout before dropping into the bin.
As some ice gets scooped out from the storage
bin, the light beam between the two sensors
resumes (fast blinking of YELLOW LED) and
tenseconds later the ice machine restarts the ice
making process - going always through the 3'
stand by - and the YELLOW LED goes off.
REFRIGERANT CIRCUIT
The hot gas refrigerant discharged out
from the compressor reaches the
condenser where, being cooled down,
condenses into liquid.
Flowing into the liquid line it passes
through the drier filter, then it goes all
the way through the capillary tube where
it looses some of its pressure so that its
pressure and temperature are lowered.
Next, the refrigerant enters into the
evaporator coil wrapped around the
freezer inner tube.
The water being constantly fed at the
interior of the freezer inner tube, exchan-
ge heat with the refrigerant circulating
into the evaporator coil, this cause the
refrigerant to boil-off and evaporate,
thereby it changes from liquid into vapor.
The vapor refrigerant then passes
through the suction accumulator and
through the suction line where the
refrigerant exchanges heat with the one
flowing into the capillary tube (warmer)
before being sucked into the compressor
to be recirculated.
The refrigerant head pressure is kept
between two pre-set values by the
condenser temperature sensor which
has its probe located within the
condenser fins - in air cooled versions.
CAPILLARY TUBE
DISCHARGE LINE
COMPRESSOR
FAN MOTOR
EVAPORATOR
SPN 1205
ACCUMULATOR
This condenser temperature sensor, when
senses a rising of the condenser temperature
beyond the pre-fixed limit, changes its electrical
resistance and send a low voltage power flow to
the MICRO-PROCESSOR of the P.C. Board
which energizes, through a TRIAC, the Fan
Motor in ON-OFF mode.
On the water cooled versions, the refrigerant
head pressure is kept at the constant value by
the metered amount of water passing through
the condenser which is regulated by the action of
the Water Regulating Valve that has its capillary
SPN 125-255-405-605
ACCUMULATOR
CAPILLARY TUBE
DISCHARGE LINE
EVAPORATOR
FAN MOTOR
COMPRESSOR
CONDENSER
SUCTION LINE
SUCTION LINE
CONDENSER
DRIED
10