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J.
CLEANING SWITCH (only 20-30-40)
Located on the bottom left side of the control box
is used to energize the water inlet and the hot gas
valves so to charge the water into the sump tank
of the machine.
K. HI PRESSURE CONTROL (Water cooled
version)
Used only on 20-30-40-50 water cooled versions
it operates to keep between 8.5 and 10 bars (120
÷
140 psig) the hi-side or discharge pressure of
the refrigerant system by energizing the coil of
the water inlet solenoid valve that control the
cooling water flow to the condenser.
L. TIMER (only 50-65-90)
Equipped with two microswitches which plungers
ride one timer cam, the timer is located inside the
control box.
The function of the timer begins when activated
by the cube size control (evap. thermostat).
The large diameter lobe of its cam determines
the length of the 2nd portion of the freezing cycle,
while the cam small diameter lobe, determines
the time cycle for the harvest sequence.
The timer cam can be adjusted to vary the defrost
time as required.
WARNING. Never set the defrost time for
longer than 4 minutes as this will
jeopardize the compressor motor
windings.
It goes without saying that an extension of the
defrost period will directly reduce the timed portion
of the freezing cycle and viceversa.
Consequently any variation made at the timer
cam setting requires a compensation adjustment,
very fine and very accurate, of the evaporator
thermostat.
M. MASTER SWITCH (only 50-65-90)
Fitted in the control box the master switch has to
be used to start-up and to stop the ice maker
operation.
N. COMPRESSOR SWITCH (only 50-65-90)
Located in the control box is used to de-energized
the compressor during the cleaning.
O. FAN PRESSURE CONTROL
(only 50-65-90)
Used on air cooled ice makers to maintain the
head pressure within the preset values.
P. WATER REGULATING VALVE
(only 65-90 Water cooled version only)
This valve controls the head pressure in the
refrigerant system by regulating the flow of water
going to the condenser.
As pressure increases, the water regulating val-
ve opens to increase the flow of cooling water.
Q. CONTACTOR (65-90 only)
It operates in order to close or open the electrical
circuit to the compressor.
Summary of Contents for EH20
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