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and two buttons for MODE and clean, and one
DIP Switch for PC board setup.
3. Compressor Contactor
Located in the control box, the compressor
contactor functions to carry the compressor line
current. The contactor is wired to receive power
from the P.C. Board.
4. Ice Thickness Sensor
Located in the front upper right side off the
evaporator, the sensor is made with two metal
reeds in which passes power at low voltage.
The two metal reeds, which are individually
insulated, are set through a setting screw, to
maintain a minimum clearance from the
evaporator (3~5 mm). Once ice is formed into
each mold and is thick enough to fill-up that
minimum clearance existing between the two
sensor reeds and the evaporator, the water that
cascades over the ice has gradually
approached to make contact between the two
sensor reeds.
It is enough that this contact remains there for
about 10 seconds that the P.C. Board receives
the signals to put the ice machine on defrost.
5. Magnetic Switch
Located in the front of the evaporator plastic
curtain, this switch sends a pulse to the P.C.
Board which switches the machine back in the
freezing cycle.
6.Hot Gas Solenoid Valve
The Hot Gas Solenoid Valve functions only
during the Harvest Cycle, to divert the hot
discharge gas from the Compressor, bypassing
the Condenser and thermostatic expansion
valve, for direct flow to the Evaporator Plate
Assembly to release ice cubes from the ice
cube molds.
The Harvest Solenoid Valve is comprised of
two parts, the Body & Plunger and the Coil
assembles.
Installed in the discharge line of the
Compressor, the energized solenoid coil lifts
the valve stem within the valve body to cause
the hot discharge gas to be diverted when the
ice Thickness sensor has signaled to the P.C.
Board to start the Harvest Cycle.
7. Condenser temperature sensor
The condenser temperature sensor probe
(located in contact with the condenser tube coil)
detects the condenser temperature variations
and signals them by supplying current, at low
voltage, to the P.C. BOARD.
In the air cooled versions, in relation to the
different current received, the micro processor
of the P.C. BOARD supplies, through a TRIAC,
the power at high voltage to the fan motor so to
cool the condenser and to reduce its
temperature.
In case the condenser temperature rises and
reaches 70
℃
(158F) the current arriving to the
micro processor is such to cause an immediate
stop of the machine operation with the blinking
of the Red LED, and first two time machine will
automatic restart, the machine will total stop
when high temperature occurs the third time,
And press MODE button can go to start up
cycle.
8. High Pressure Control
The high Pressure Control, a safety control, is
factory set to cut-out, at 33bar and cut-in at 22
bar. The control, functions as a precautionary
device to shut OFF electrical power to
Icemaker, should a loss of water occur to the
water cooled Condenser or a burnt out of the
fan motor on air cooled versions. The high
Pressure Control is manual reset with reset
button located on the rear side of the machine
and a monitoring light on the Front Console
Panel.
9. Water Regulating Valve
(Water Cooled Models)
The Water Regulating Valve functions maintain
a constant Compressor head pressure, by
regulating the amount of incoming water flow
through the Condenser, on water-cooled
models. The valve operates through the
refrigerant system high side pressure. Rotating
the adjusting screw located on top of the valve,
can INCREASE or DECREASE the water flow
through the water- cooled Condenser, which in
turn, will DECREASE or INREASE the
Compressor operating head pressure.
10. Water Distribution System
The Water Distribution System functions to
even supply water to all cells of the evaporator
plate. The water pump pumps water from the
sump to the tee. From there water is channeled
through the vertical PVC tube to the water
