Icematic N25S, Service Manual

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MACHINE MAIN PARTS DESCRIPTION
B. BIN THERMOSTAT
The bin thermostat, which has its sensing bulb downward
into the storage bin, shuts-OFF automatically the icemak-
er when the ice storage bin is filled and ice contacts its
bulb.
Lighting of the proper led paints out that the storage bin is
full.
HI PRESSURE CONTROL
(N35S, N55S, N55L, N50BI, N70S, N90S, N90L, N140)
On water cooled ice makers it functions to mainlain the
head pressure within the present values of 8 and 10 bars,
by intermittently activating the water inlet valve to the con-
denser (in the water cooled models).
On air cooled ice-makers it keeps the head pressure with-
in 2 preset values (8/10 bar) by starting the electric fan of
the condensing unit.
HI TEMPERATURE SAFETY THERMOSTAT
(All water cooled model)
Fastened directly onto the rifregerant liquid line and elec-
trically connected upstream all other controls, this safety
thermostat shut-off the icemakers when senses that the
temperature at the liquid line has rised to the limit of 65°C.
FEEDING WATER INLET SOLENOID VALVE
The water inlet solenoid valve is activated only at the end
of the defrosting cycle. When energized it allows a
metered amant of incoming water to flow into the tilting
pan untill the float closes the inlet circuit.
I. THE HOT GAS SOLENOID VALVE
The hot gas solenoid valve consists basically in two parts:
the valve body and the valve coil.
Located on the hot gas line. During the defrost cycle the
hot gas valve coil is activated so to attract the hot gas dis-
charged from compressor to flow directly into the evapo-
rator serpentine to defrost the formed ice cubes.
L. FAN MOTOR (Air cooled version)
The fan motor, operates during the freezing cycle to draw
cooling air through the condenser fins so to keep the con-
densing pressure between the 9/7 bars values.
COOLING WATER INLET SOLENOID VALVE
(N25SW, N35SW)
A second water inlet solenoid valve, operating through an
automatic hi-pressure control, is used on water cooled
versions to supply water to the condenser.
When activated it supplies a metered amount of water to
the condenser in order to limit its temperature and the
refriferant operating high pressure.
N. WATER REGULATING VALVE
(N45SW, N55SW, N50BIW, N70SW, N90SW, N140W)
This valve controls the head pressure in the refrigerant
system by regulating the flow of water going to the con-
denser.
As pressure increases, the water regulating valve opens
to increases, the water regulating valve opens to increase
the flow of cooling water.
O. COMPRESSOR
The hermetic compressor is the heart of the refrigerant
system and it is used to circulate and retrieve the refriger-
ant throughout the entire system. It compresses the low
pressure refrigerant vapor causing its temeprature to rise
and become high pressure hot vapor which is then
released through the disharge valve.
MAXIMUM PRESSURE SWITCH
(N45SW, N55SW, N50BIW, N70SW, N90SW, N140W)
Fastened directly on to the refrigerant liquid line and elec-
trically connected upstream all other controls, it shut off
the ice-maker when senses that the head pressure reach-
es 15 bars.