Page 27
Page 27
6.
Hot Gas Solenoid Valve
The Hot Gas Solenoid Valve functions only during
the Harvest Cycle, to divert the hot discharge gas
from the Compressor, bypassing the Condenden-
ser and thermostatic expansion valve, for direct
flow to the Evaporator Platen Assembly to release
ice cubes from the ice cube molds.
The Hot Gas Solenoid Valve is comprised of two
parts, the Body & Plunger and the Coil assembles.
Installed in the discharge line of the Compressor,
the energized solenoid coil lifts the valve stem
within the valve body to cause the hot discarge
gas to be diverted when the ice Thickness sensor
has signalled to the P.C. Board to start the
Harvest Cycle.
7.
Condenser temperature sensor
The condenser temperature sensor probe
(located in contact with the condenser tube coil)
detects the condenser temperature variations
and signals them by supplying current, at low
voltage, to the P.C. BOARD.
In the air cooled versions, in relation to the
different current received, the micro processor of
the P.C. BOARD supplies, through a TRIAC, the
power at high voltage to the fan motor so to cool
the condenser and to reduce its temperature.
In case the condenser temperature rises and
reaches 65
°
C (150
°
F) the current arriving to the
micro processor is such to cause an immediate
and total stop of the machine operation with the
blinking of the Red LED.
8.
High Pressure Control
The high Pressure Control, a safety control, is
factory set to cut-out, at 30 bar and cut-in at 22
bar.
4.
Ice Thickness Sensor
Located in the front upper right side off the
evaporator, the sensor is made with two metal
reeds in which passes power at low voltage. The
two metal reeds, which are individually insulated,
are set, through a setting screw, to maintain
a minimum clearence from the evaporator
(3
÷
5 mm).
Once ice is formed into each mold and is thick
enough to fill-up that minimum clearance existing
between the two sensor reeds and the evaporator,
the water that cascades over the ice has gradually
approached to make contact between the two
sensor reeds.
It is enough that this contact remains there for
about 10 seconds that the P.C. Board receives
the signals to put the ice machine on defrost.
5.
Magnetic Switch
Located in the front of the evaporator plastic
curtain, this switch sends a pulse to the P.C.
Board which switches the machine back in the
freezing cycle.
