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Page 31
OPERATING CHARACTERISTICS
Freeze Cycle
Average Discharge
Pressure A/C: 9.5÷8.5 bar (130÷110 psig)
Average Discharge
Pressure W/C: 10.5÷9.5 bar (150÷135 psig)
Suction Pressure
End Freeze Cycle: 0 ÷ 0.1 bar (0 ÷ 1 psig)
REFRIGERANT METERING DEVICE:
capillary tube
REFRIGERANT CHARGE (R 134 A)
Air cooled Water cooled
EC 45 250 gr (9.0 oz.) 250 gr (9.0 oz.)
EC 55 260 gr (9.3 oz.) 250 gr (9.0 oz.)
EC 85 290 gr (10.2 oz.) 250 gr (9.0 oz.)
EC 105 320 gr (11.0 oz.) 250 gr (9.0 oz.)
EC 125 450 gr (16.0 oz.) 300 gr (10.6 oz.)
EC 175 450 gr (16.0 oz.) 330 gr (11.6 oz.)
COMPONENTS DESCRIPTION
A. EVAPORATOR TEMPERATURE
SENSOR
The evaporator temperature sensor probe,
located in contact with the evaporator serpentine,
detects the dropping of the evaporator tempera-
ture during the freezing cycle and signals it by
supplying a current flow to the micro processor of
P.C. BOARD.
According to the current received is energized
the small Red LED of the PC Board (blink or
steady). When steady, the micro processor
supplies power to the electronic timer built into
the P.C. BOARD so that it takes control of the last
portion of freezing cycle.
The length of the timed phase is pre-fixed by the
setting of the keys 1, 2, 3 and 4 of the DIP
SWITCH.
NOTE. Whenever, after 15 minutes from the
beginning of the freezing cycle, the
evaporating temperature have not yet
reached the value of 0
°
C (32
°
F) - small Red
LED OFF - the P.C.Board switches OFF the
machine with the BLINKING of WARNING
RED LED.
B. CONDENSER TEMPERATURE SENSOR
The condenser temperature sensor probe,
located within the condenser fins (air cooled
version) or in contact with the tube coil (water
cooled version) detects the condenser tempe-
rature variations and signals them by supplying
current, at low voltage, to the P.C. BOARD.
In the air cooled versions, in relation to the
different current received, the micro processor of
the P.C. BOARD supplies, through a TRIAC, the
power at high voltage to the fan motor so to cool
the condenser and to reduce its temperature.
In case the condenser temperature rises and
reaches 70°C (160°F) - on air cooled models - or
60°C (140°F) - on water cooled models - the
current arriving to the micro processor is such to
cause an immediate and total stop of the machine
operation.
C. ICE BIN LEVEL LIGHT CONTROL
The electronic ice bin level control, located into
the storage bin, has the function to stop the
operation of the ice machine when the light beam
between the light source and the sensor is
interrupted by the ice cubes stored into the bin.
When the light beam is interrupted the Bin Full
YELLOW LED starts to blink; in case the light
beam is constantly interrupted for more than 60
seconds, the ice machine stops with the glowing-
up of the Bin Full YELLOW LED to monitor the
situation of ice bin full.
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