Subzero BI Series, Service Manual

Page 4

Icemaker Information

6-4

#7005333 - Revision C - September, 2010

Built-In (BI) Series

Built-In (BI) Series

Start of the First Revolution  

(See Figure 6-3)

• The water in the ice mold has turned to ice.

• At 15°F (-9°C) ± 3° 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.