Icematic N21, Service Manual

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The water pumped, is sprayed throught its nozzles in
each individual mold or onto each evaporator tip to be
frozen into ice.
G. WATER PUMP
The water pump operates continually throughout the
freezing cycle.
The pump primes the water from the sump to the spray it
to the copper molds or onto the evaporator tips to be
frozen into crystel clear ice cubes.
It si reccommended that the pump motor bearings be
checked at least every six months.
H. WATER INLET SOLENOID VALVE -
3/4 MALE FITTING
The water inlet solenoid valve is activasted by the timer
microswitch only during the defrodt cycle. When ener-
gized it allows a metered amount of incoming water to
flow over the evaporator cavity to assist the hot gas in
defrosting the ice cubes. The water running over evapo-
rator cavity drops by gravity, through the dribbler holes of
the plated, into the sump reservoir where it will be spray
system.
I. 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, this valve is enerized through
the timer microswitch conctats COM-NC during the
defrost cycle.
During the defrost cycle the hot gas valve coil is activated
so to attract the hot gas discharged from compressor to
flow directly into the evaporator 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.
M. WATER INLET SOLENID VALVE -
3/4 MALE FITTING
N 21 (water cooled version)
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
refrigerant operating high pressure.
N. WATER REGULATING VALVE
(Water cooled version)
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 temperature to rise
and become high pressure hot vapor which is then
released through the discharge valve.