Icematic N21, Service Manual

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GB
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MAINTENANCE AND
CLEANING INSTRUCTIONS
A. GENERAL
The periods and the procedures for maintenance and
cleaning are given as guides and are not to be construed
as absolute or invariable.
Cleaning, especially, will vary depending upon local water
and ambient conditions and the ive volume produced;
and, each icemaker must be maintened individually, in
accordance with its particular location requirements.
B. ICEMAKER
The following maintance should be scheduled at least two
times per year on these icemakers.
1. Check and clean the water line strainer.
2. Check that the icemaker is levelled in side to side and
in front to rear directions.
3. Clean the water system, evaporator, bin and spray jets
using a solution of Ice Machine Cleaner. (Acid citric)
Refer to procedure C cleaning instrutions and after
cleaning instructions and after cleaning will indicate
frequency and procedure to be followed in local areas.
NOTE. Cleaning requirements vary according to the
local water conditions and individual user operation.
Continuous check of the clarity of ice cubes and visu-
al inspection of the water spraying parts before and
after cleaning will indicate frequency and procedure to
be followed in local areas.
4. With the ice machine and fan motor OFF on air cooled
models, clean condenser using vacuum cleaner, whisk
broom or non metallic brush taking care to do not dam-
age both the condenser and ambient temperature sen-
sors.
5. Check for water leaks and tighten drain line connec-
tions. Pour water down bin drain line to be sure that
drain line is open and clear.
6. Check size, condition and texture of ice cubes.
Perform adjustment of the evaporator thermostat or
cube size control by turning its adjusting screw clock-
wise for a thicker ice cube and counterclockwise for a
thiner one.
7. Check the bin thermostat to test shut-off. Put a hand-
full of ice cubes in contact with its bulb. This should
cause the ice maker to shut off within 20÷30”.
NOTE. Perform the above check only at the beginning
oh the harvest cycle as, during the freezing cycle the
bin thermostat contacts are bypassed by the front
microswitch of the timer.
When remove the ice cubes from its sensing bulb the unit
will restart after few seconds from the defrost cycle assur-
ing the filling up of the water tank.
NOTE. It is possible tu adjust the setting temperature
of the bin thermostat by slihtly turning its adjusting
screw.
8. Check for refrigerant leaks.
C. CLEANING INSTRUCTIONS OF WATER
SYSTEM
1. Remove the front and the top panels to gain access
either to the control box and to the evaporator.
2. Wait till the end of defrost cycle then, OFF the machine
with the master switch on power line.
3. Scoop out all the ice cubes stored into the bin in order
to prevent from being contaminated with the cleaning
solution then flush out the water from the sump reser-
voir by removing the overflow stand-pipe.
4. Prepare the cleaning solution by diluting ina plastic
container two or three liters of warm water (45°÷ 50°
C) with a 0,2 ÷ 0,3 liters of Ice Machine Cleaner.
5. Remove the evaporator cover then slowly pour onto
the evaporator platen teh cleaning solution. With the
help of a brush dissolve the most resistant and remote
scale deposits in the platen.
6. Set the cleaning switch (where fitted) on CLEANING
position and give power to the unit by the master
switch (Fig. 6).
NOTE. With the system in CLEANING mode the
water pump is the only component in operation to cir-
culate the cleaning solution in the entire water system.
On the model N. 21, with non cleaning switch, even
the compressor will be energized; this will partially
limit the descaling effect of the cleaning solution.
7. Let the unit to remain in the CLEANING mode for
about 20 minutes the switch OFF the machine.
8. Flush out the cleaning solution from the sump reser-
voir then pour onto the evaporator cavity one or two
liters of clean potable water with a capfull of antibacte-
ria solution to rinse and sanitize the molds and the
spray system.
If necessary remove the spary bar and nozzles to
clean them separately then refit them.
9. Set back the master switch to ON. The water pump is
again in operation to circulate the water and the
antibacterial solution in order to rinse the entire water
system.