Freezing Cycle Operation - Scotsman CME1202 User Manual

CME1202R & CME1402R

FREEZING CYCLE OPERATION

Water from the sump assembly is pumped to the
water distributor system at the top of each
evaporator plate. From the water distributor the
water cascades by gravity over all cells of the plate
and to the sump assembly below.
At the beginning of the freezing cycle, the electrical
circuit is completed to the compressor and the
water pump. The water pump operates
continuously, through both the freezing cycle and
the harvest cycle.
During the freezing cycle, the hot gas solenoid
valve is CLOSED and the water inlet solenoid
valve is CLOSED. When the ice cubes are partially
formed, the cube size control will sense the
temperature at which it is preset to CLOSE. This
will complete the electrical circuit to the timer. The
timer then controls the remainder of the freezing
cycle. The timer will keep the ice maker operating
in the freezing cycle for a selected length of time.
This will give the ice cubes time to fully form. after
that selected length of time, the timer will switch
the ice maker into the harvest cycle, through the
contacts of the timer assembly microswitch.
Low Temperature Freeze:
When the outside air temperature is low, the Head
Pressure Regulator will close off the liquid line to
the receiver, causing liquid refrigerant to back up
into the condenser until the head pressure builds
up to 240 PSIG. While this is occurring, the head
pressure regulator passes discharge gas into the
receiver to keep the refrigerant flowing.
INLET
WATER
VALVE
DRAIN
REFRIGERATION SCHEMATIC
June 1996
Page 14
WATER DISTRIBUTION
RESERVOIR
WATER SCHEMATIC