Scotsman B 21 WS Manuel De Service page 16

Freezing time will range between 20 and 22
minutes in a 21°C ambient temperature, longer if
above this temperature and shorter if below. The
average complete cycle time is between 23 and
25 minutes.
F. Check, during the first defrost/harvest
cycle, that the incoming water flows correctly into
the sump reservoir in order to re-fill it and the
surplus overflows through the overflow drain tube.
G. Check the texture of ice cubes just
released. Right size must have a small depression
(about 5-6 mm) in their crown.
If not, wait for the second defrost/harvest cycle
before performing any adjustment.
H. If required on model 18, 21, 31 and 40, the
length of the freezing cycle can be modified by
turning the knob of the cube size control or
evaporator thermostat located in front of the
control box until the desired size is achieved.
• If the temperatu-
re of the room in
which the machine
is place is below
°
20 C, the cubes will
tend to be partly
hollowed out (see
fig. on right).
• If, on the other
hand, the room
temperature is
°
above 30 C the
cubes produced
will have a jagged
rim of ice around
the crown.
If it is thought necessary, the above situations
can be rectified by, in the first case, turning the
control knob (as little or as much as is required)
clockwise and, in the second case, turning the
knob to the right counterclockwise.
It should, however, be remembered that if the
room temperature returns later to the 20 ÷ 30°C
range, the knob indicator must once again be
turned to point to the dot (see fig. below).
If the ice cubes are shallow and cloudy, it is
possible that the ice maker runs short of water
during the end of the freezing cycle or, the quality
of the supplied water requires the use of an
appropriate water filter or conditioner.
I. At the end of the defrost or harvest cycle
hold a handful of ice cubes against the bulb of the
storage bin thermostat; the icemaker switch OFF
in about one-two minutes.
Take out the ice from the storage bin thermostat.
The ice maker should restart automatically in
three-four minutes.
NOTE. The bin thermostat is factory set at
1 ° C (35 ° F) OUT and 4 ° C (39 ° F) IN.
K. Re-fit the unit front panel then instruct the
owner/user on the general operation of the ice
machine and about the cleaning and care it
requires.
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