Scotsman TCL 180 Service Manual page 16

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I. FLOAT RESERVOIR
The float reservoir consists of a plastic water pan
on which is fitted a float valve with its setting
screw. The float valve modulate the incoming
water flow to maintain a constant water level in
the reservoir, level that corresponds to the one in
the freezing cylinder to ensure proper ice
formation and fluidity.
On the inner side of the reservoir cover are fitted
the two water level sensors which detects the
presence or the shortage of water in the reservoir.
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 made by several rectangular
openings where the ice is forced to pass through.
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 bearings
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.
N. 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.
O. ICE DISPENSER DRIVE MOTOR
Located on the upper side of the storage bin, it
turn by a milled shaft the dispensing vane placed
inside the round storage bin.
By rotating, the dispensing vane pushes the ice
towards the bottom rectangular opening so to
force the nugget ice to go through the bottom
outlet spout.
P. STORAGE BIN
Round shaped it is located in the front of the ice
machine and has the main reason to store the
nugget ice produced by the evaporator till it
reaches its maximum level controlled by an
infrared optical system. In its bottom is placed the
ice spout as well as the water drain hole.
Inside the ice spout opening is also located the
water outlet tube connected to the solenoid val-
ve.
Q. DISPENSING WATER SOLENOID VALVE
(NOT USED ON EVO VERSION)
Energized and controlled by the PC Board, it
allows a metered quantity of not chilled water to
be dispensed through the same opening of the
ice.
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