Icematic F 125C, Service Manual

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J FREEZING CYLINDER or EVAPORATOR
(Two on SFN 1000)
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 (Two on SFN 1000)
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.
On the other models the ice breaker is made by
several rectangular openings where the ice is for-
ced 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 top bearing
every six months.
L GEAR MOTOR (Two on SFN 1000)
The gear motor 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
with the first one in fiber to limit the noise level. All
the three gears are encased in case roller bea-
rings 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 sea-
led.
The interior can be inspected and serviced by
unbolting the two halves of the aluminium gear
case housing.
M FAN MOTOR (Air cooled version)
The fan motor is controlled through the TRIAC of
the P.C. BOARD by the condenser temperature
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 WATER REGULATING VALVE
(Water cooled version)
This valve controls the head pressure in the refri-
gerant system by regulating the flow of water
going to the condenser.
As pressure increases, the water regulating valve
opens to increase the flow of cooling water.
O COMPRESSOR
The hermetic compressor is the heart of the refri-
gerant system and it is used to circulate and retrie-
ve 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.