Nordcap SDH 50 L Bedienungsanweisung Seite 10

G. SAFETY THERMOSTAT/PRESSURE SWITCH
(BY HAND RESET)
Fastened directly onto the refrigerant liquid line
and electrically connected upstream all other
controls, this safety device shut-off the icemakers
when senses that the temperature at the liquid
line has rised to the limit of 75
corresponding pressure.
H. WATER SPRAY SYSTEM
It consists of one spray bar with several spray
nozzles on its extension.
The water pumped, is sprayed through its nozzles
in each individual mold or onto each evaporator
tip to be frozen into ice.
I. WATER PUMP
The water pump operates continually throughout
the freezing cycle.
The pump primes the water from the sump to the
spray system and through the spray nozzles
sprays it to the copper molds or onto the
evaporator tips to be frozen into crystal clear ice
cubes. It is recommended that the pump motor
bearings be checked at least every six months.
J. WATER INLET SOLENOID VALVE -
3/4 MALE FITTING
The water inlet solenoid valve is activated by the
timer microswitch only during the defrost cycle.
When energized 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 the evaporator cavity
drops by gravity, through the dribbler holes of the
platen, into the sump reservoir where it will be
sucked by the water pump and primed to the
spray system.
K. 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 energized
through the electronic timer during the
defrost cycle.
During the defrost cycle the hot gas valve coil is
activated so to attract the hot gas valve piston in
order to give way to the hot gas discharged from
compressor to flow directly into the evaporator
serpentine to defrost the formed ice cubes.
L.
The fan motor, in the SDH 64
model is electrically connected in series with the
pressure control operates during the freezing
°C (170°F) or
cycle to draw cooling air through the condenser
fins so to keep the condensing pressure between
the two preset values 11÷14,5 bars.
.
In the other models the fan motor works
continuosly in order to maintain the
condensing pressure between 10,5 ÷ 12,5 bars
. WATER INLET SOLENOID VALVE -
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 tempe-
rature and the refrigerant operating high pressure.
N.
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.
O.
The hermetic compressor is the heart of the
refrigerant system and it is used to circulate and
retrieve the refrigerant 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.
P
l
t
c
10
FAN MOTOR
3/4 MALE FITTING
÷
(SDE30 64 water cooled version)
WATER REGULATING VALVE
(Water cooled version SDE84
COMPRESSOR
÷
220)