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Page 11
WATER CIRCUIT
The water enter in the machine through the
water inlet valve (which incorporates a strainer
and it is located at the rear side of the cabinet)
and 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or is no longer maintained that, as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
operation with the simultaneous glowing of
the AØ1 signalling "Shortage of water".
The float reservoir is positioned at the side of the
freezing cylinder at such an height to be able to
maintain a constant water level around the freezer
auger. In fact, the water flows from the reservoir
into the bottom inlet of the freezing cylinder 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 stainless steel
auger that rotates counter-clockwise within the
freezer, is 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.
ICE SPOUT
FLOAT TANK
FLOAT VALVE
FREEZER
FREEZER
WATER
FEED LINE
The ice, being costantly lifted up, meet the tooth
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, into the storage bin.
PRINCIPLE OF OPERATION
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 under the storage bin
cover.
As the ice level raises to interrupt the light beam
running between the two infrared lamps, the unit
stops after ten seconds (compressor first and 3
minutes later the gear reducer).
NOTE.
interruption of the light beam the unit stops
and the bF1 glows on display.
The 10 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 is dispensed from the storage bin,
the light beam between the two sensors resumes
and ten seconds later the ice machine restarts
the ice making process.
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.
The water being constantly fed at the interior of
the freezer inner tube, exchange heat with the
refrigerant circulating into the evaporator, 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 heat pressure is kept between
two pre-set values by the condenser temperatu-
re sensor which has its probe located within the
condenser fins - in air cooled versions.
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.
After about 10" of steady
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