Component Description - Scotsman MDT2C12 User Manual

MDT2

COMPONENT DESCRIPTION

I. FLOAT RESERVOIR
The float reservoir consists of a plastic water pan
which has a float valve with a set screw on it. The
float valve modulates the incoming water flow to
maintain a constant water level in the reservoir that
corresponds to the one in the freezing cylinder to
ensure proper ice formation and fluidity.
On the inside of the reservoir cover are two water
level sensors that detect the presence or shortage
of water in the reservoir.
NOTE: It is very important to make sure that the
cover on the reservoir is seated properly to enable
the sensors to efficiently control the water level to
avoid undue shutoff.
J. FREEZING CYLINDER (EVAPORATOR)
The freezing cylinder is made of a stainless steel
vertical tube. The cooling coil is wrapped around
its exterior with the evaporating chamber. In its
interior is the auger which rotates on a vertical axis
that is kept aligned by the top and bottom bearings.
A water seal system is located in the bottom part of
the freezer and the ice breaker is fitted on top end.
The water constantly flows into the cylinder bottom
and it freezes into ice when it comes into contact
with the cylinder inner walls. The ice is then lifted
up by the rotating auger, compacted and forced out
by the icebreaker.
K. ICE BREAKER
The icebreaker is made up of several rectangular
openings that the ice is forced to pass through. By
undergoing this process, the ice loses its excess of
water content and drops into the bin in hard dry
bits of ice.
The icebreaker houses the top bearing, which is
made of two roller bearings, positioned to
withstand the auger axial and radial loads. This
bearing is lubricated with a food-grade,
water-resistant grease.
NOTE: Check the conditions of both the lubricant
grease and the bearings every six months.
L. DRIVE GEAR MOTOR
This motor reducer is made of a single-phase
electric motor with a permanent capacitor directly
fitted on a gearbox.
The drive motor rotor is kept aligned on its vertical
axis by two permanently lubricated ball bearings.
The gear case contains a train of three spur gears,
the first of which is fiber to limit the noise level. All
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. However, the interior can be inspected
and serviced by unbolting the two halves of the
aluminum gear case housing.
The gear reducer output shaft is connected to the
freezer auger by a ratchet coupling which is made
of two toothed halves that engage only if turned in
the correct direction (counter-clockwise).
M. FAN MOTOR (Air cooled version)
The fan motor is controlled through the PC Board
and the TRIAC by the condenser temperature
sensor. Normally it operates to draw cooling air
through the condenser fins.
In a cold ambient situation, the fan motor can run
intermittently as the condenser pressure must be
kept between two corresponding head pressure
values.
N. ICE DISPENSER DRIVE MOTOR
Located on the upper side of the storage bin, it
turns the dispensing vane by a milled shaft inside
the round storage bin.
By rotating, the dispensing vane pushes the ice
towards the bottom rectangular opening to force
the nugget ice to go through the bottom outlet
spout.
O. STORAGE BIN
The storage bin is located in the front of the ice
machine. It main purpose is to store the cubelet
ice produced by the evaporator until it reaches its
maximum level. In its bottom is placed the ice
spout as well as the water drain hole.
Inside the ice spout opening is the water outlet
tube connected to the solenoid valve.
P. DISPENSING WATER SOLENOID VALVE
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.
May 2002
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