Simag SD 22 Bedienungsanleitung Seite 16

When positioned on "Rinsing" the water pump
primes the fresh incoming water to remove from
allover the unit water system any residue of the
cleaning solution left over in the previous phase.
NOTE. Itis recommended to avoid the rinsing,
after the sanitation of the unit water system,
as any bactericide æating, which is beneficial
to limit the bacteria growth, left-over in the
system may be removed.
F. HI PRESSURE CONTROL
Used either on air and water cooled ice makers
it functions to maintain the head pressure within
the preset values of 13,5 and 14,5 bars, by
intermittently activating the fan motor (in the atr
cooled models) and the water inlet valve to the
condenser (in the water cooled models).
G. HI TEMPERATURE SAFETY THERMOSTAT
(Water cooled models only)
Fastened directly onto the refrigerant liquid line
and electrically 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 650C.
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.
l. WATER PUMP
The water pump operates continually throughout
the freezing cycle.
The pump primesthe water from the sumpto 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
3/4 MALE FITTING
The water inlet solenoid valve is activated by the
timer microswitch OnlYdunng the defrost cycle.
When energized it allows a metered amount of
incomingwaterto flowover theevaporator 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
The hot gas solenoid valve consists basically in
two parts: the valve body and the valve coif.
Located on the hotgas tine,this valve is energized
through
COM-NC 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. FAN MOTOR (Air cooled version)
The fan motor, electrically connected in series
with the pressure control operates during the
freezing cycle to draw cooling air through the
condenser fins so to keep the condensing
pressure
(13.5+14.5 bars-190+205 psig).
M. WATER
3/4 MALE
(SD 22 and SD 23 water cooled version)
A second water inlet solenoid valve, operating
throug han 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 orderto limit its tempe-
rature and the refrigerant operating high pressure.
N. WATER
(Water cooled version)
This valve controls the head pressure in the
refrigerantsystemby regulatingtheflow of water
going to the condenser.
As pressure-increases, the water regulating val-
ve 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 refrigerant throughout the entire
VALVE -
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. RELAY (SD 125 & SD 210 only)
Placed inside the control box it operates in order
to close or open the electrical circuit to the
compressor.
SOLENOID VALVE
the timer microswitch
between the two preset values
INLET SOLENOID VALVE
FITTING
REGULATING VALVE
Page 9
conctats