Ice-O-Matic ICEF 155 Service Manual page 20

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NOTE. It is very important to make sure of the
correct fitting of the cover on the reservoir in
order to enable the sensor to efficiently control
the water situation avoiding undue shutoff
interventions.
J. FREEZING CYLINDER (EVAPORATOR)
The freezing cylinder is made of a stainless steel
vertical tube on which exterior is wrapped around
the cooling coil with the evaporating chamber
and in its interior is located the auger which
rotates on its vertical axis and it is maintained
aligned by the top and bottom bearings. A water
seal system is located in the bottom part of the
freezer while at the top end is fitted the ice
breaker.
The water constantly flowing into the cylinder
bottom part, freezes into ice when in contact with
the cylinder inner walls. The ice is then lifted up
by the rotating auger and compacted and forced
out by the ice breaker.
K. ICE BREAKER
The ice breaker is fitted in the freezer upper part
it has two breaker teeth to break the ice and with
its slanted shape from the rear tooth to the front
one it compacts and forces the ice out in an
horizontal way. By undergoing this, the ice looses
its excess of water content so it drops into the bin
in hard dry bits of ice.
In the ice breaker it is housed the top bearing
which is made of two rolls bearings positioned to
withstand the auger axial and radial loads. This
bearing is lubricated with a food grade - water
resistant grease.
NOTE. It is advisable to check the conditions
of both the lubricant grease and the top
bearing every six months.
L. DRIVE GEAR MOTOR
This motoreducer is made of a single phase
electric motor with permanent capacitor directly
fitted on a gear box.
The drive motor rotor is kept aligned on its vertical
axis by two ball bearings permanently lubricated.
The gear case contains a train of three spur
gears the first one of which is in fiber to limit the
noise level. All the three gears are encased in
case bearings and are covered by lubricant grease
(MOBILPLEX IP 44).
Two seal rings, one fitted on the rotor shaft and
the other on the output shaft keep the gear case
sealed.
Hovewer, the interior can be inspected and
serviced by unbolting the two halves of the
aluminium gear case housing.
The gear reducer output shaft is connected to the
freezer auger by a ratched coupling which is
made of two toothed halves that engages
themselves only if turned in the correct direction
namely, conterclockwise.
M. FAN MOTOR (Air cooled version)
The fan motor is controlled through the P.C.
BOARD and the TRIAC by the condenser tempe-
rature sensor. Normally it operates to draw cooling
air through the condenser fins.
In cold ambient situation, the fan motor can run at
intermittance as the condenser pressure must be
kept between two corresponding head pressure
values 8.5÷9.5 bar - 120÷135 psig.
N. WATER REGULATING VALVE
(Water cooled version)
This valve controls the head pressure in the
refrigerant system by regulating the flow of water
going to the condenser.
As pressure increases, the water regulating val-
ve opens to increase the flow of cooling water.
O. 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 which is then released
through the discharge valve.
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