Sub-Zero 642/F

Icemaker Information
600 Series
(Prior to #1810000)
6-4
#3756270 - Revision B - January, 2006
Start of the First Revolution (See Figure 6-3)
• The water in the ice mold has turned to ice.
• At 15°F/± 3°F the thermostat closes.
• The mold heater is energized through the thermo-
stat.
• The drive motor is started through the thermostat
and “normally closed” terminal of the holding
switch.
• The ice ejector begins to turn and the shut-off arm
begins to rise.
Figure 6-3. Start of First Revolution
APPROXIMATE POSITION
OF ICE EJECTOR AND
ICE LEVEL ARM
DURING OPERATION
115 VOLTS
60 CYCLES
SHUT-OFF SWITCH
THERMOSTAT
MOLD HEATER
WATER
SOLENOID
SOLENOID SWITCH
MOTOR
HOLDING SWITCH
NO
NC
C
NC
NC
NO
NO
C
C
TCO
ICE MOLD
ICE BUCKET
ICE
Figure 6-4. First Revolution Continued
APPROXIMATE POSITION
OF ICE EJECTOR AND
ICE LEVEL ARM
DURING OPERATION
115 VOLTS
60 CYCLES
SHUT-OFF SWITCH
THERMOSTAT
MOLD HEATER
WATER
SOLENOID
SOLENOID SWITCH
MOTOR
HOLDING SWITCH
NO
NC
C
NC
NC
NO
NO
C
C
TCO
ICE MOLD
ICE BUCKET
ICE
First Revolution Continued (See Figure 6-4)
• The holding switch is tripped by the timing cam to
“normally open” thus holding power to the motor.
• The mold heater remains energized through the
thermostat.
• The shut-off arm begins to rise.