Sub-Zero 700TC-3 Service Manual page 60

Icemaker Information
MIDSOUTH AND JAPAN-SERVO ICEMAK-
ER COMPONENTS
(700TCI-3 AND 736TCI-3 ONLY)
Following are descriptions that explain the function of
each icemaker component. The components are dia-
gramed in Figure 6-7, below.
Support - The support is the housing around the elec-
trical components and wire connections. The support is
attached to the ice mold.
Mounting Plate - The drive motor, holding switch,
water valve solenoid switch, timing gear, timing cam
and water fill adjusting screw are attached to the metal
mounting plate. The mounting plate is then attached to
the support.
Drive Motor - 115 volts AC supplied to the drive motor
causes the motor to operate. The motor has a single
output shaft with a small gear. The motor gear
drives/spins the timing gear.
Timing Gear - The timing gear is driven/spun by the
drive motor gear and is attached to the timing cam.
Timing Cam - The timing cam is attached to the tim-
ing gear and the ice ejector is inserted into the center of
the timing cam. As the timing cam rotates, high and
low spots on the cam operate the water valve solenoid
switch and the holding switch. The timing cam also
moves the lever arm side to side and rotates the ice
ejector.
Ice Mold - The ice mold is where the eight crescent
shaped ice cubes are formed.
Mold Heater - The mold heater uses 165 watts to
thaw the ice free from the mold.
Ice Ejector - The drive end
of the ice ejector is "D"
shaped to fit into the "D"
shaped hole in the timing
cam. It has eight blades
which rotate and sweep the
ice from the mold cavities dur-
ing the ejection phase of the
cycle.
Ice Stripper - The stripper is
attached to the dumping side
of the mold, serving as a dec-
orative side cover and it also
prevents ice from falling back
into the mold.
#3758412 - Revision B - December, 2006
Integrated
Integrated
(Location of Thermal-Mastic)
Thermostat
Drive Motor
Holding Switch
Support Plate
Timing Gear
Cover
Figure 6-7. Diagram of Icemaker Components
6-6
3
3
(700- T ALL)
(700- T ALL)
Bearing / Inlet - The bearing / inlet is attached to the
ice mold, opposite the support. Water enters the bear-
ing / inlet and is directed to the ice mold. The
bearing/inlet also supports the ice ejector at the end
opposite the timing cam.
Thermostat - The thermostat is a single-pole, single-
throw, bi-metal switch. At 15°F (-9°C) ± 3° it closes,
starting the ice ejection phase.
Thermal-Mastic - A substance similar in appearance
to grease that is applied between the thermostat and
the ice mold. Its purpose is to increase thermal con-
ductivity between the mold and the thermostat.
Lever Arm and Shut-off Arm - The lever arm is
moved side to side by two revolutions of the timing
cam. As it moves, it raises and lowers the shut-off arm
and operates the shut-off switch to control the quantity
of ice production. If the shut-off arm comes to rest on
top of the ice in the storage bin during either revolution,
the shut-off switch will remain open, stopping ice pro-
duction at the end of that revolution.
Water Valve Solenoid Switch - A single-pole, double-
throw type switch that allows electricity to the water
valve solenoid, opening the valve, during the fill cycle.
Holding Switch - A single-pole, double-throw type
switch that assures completion of a revolution once the
icemaker has been energized.
Shut-off Switch - A single-pole, double-throw type
switch that stops ice production when the ice bin is full.
TCO (Thermal Cut Out) - The TCO is thermal protec-
tion device in the wire harness that would open in the
event of mechanical failure, thus protecting against over
heating. (The TCO is not shown in diagram.)
Ice Ejector
Shut-off Switch
Support
Lever Arm
Timing Cam
Water Valve Solenoid Switch
Series
Series
Bearing / Inlet
Ice Stripper
Ice Mold and Mold Heater
Ice Level Arm