Bartscher B20, Instruction Manual

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OPERATING INSTRUCTIONS
START UP
After having correctly installed the ice maker and
completed the plumbing and electrical
connections, perform the following “Start-up”
procedure.
B 20 - B 40 - B 45
A. Remove the unit front panel and locate the
cleaning switch on the control box.
B. Set the cleaning switch in the cleaning
position (II). This will close the electrical circuit to
the water inlet valve and to the hot gas valve.
C. Switch ON the power line disconnect switch.
Unit will start up in water filling phase mode.
During this phase the components energized
are:
WATER INLET SOLENOID VALVE
HOT GAS SOLENOID VALVE
The Water pump and the Fan motor are also in
operation.
D. Let unit stay in water filling phase mode for
about three/four minutes till water is coming out
from the drain hose, then move the cleaning
switch to the operation position (I).
B 75 - B 90
A. Give power to the unit to start it up by
switching ON the power line main switch; the unit
will start automatically in defrost cycle with the
following components energized:
WATER INLET SOLENOID VALVE
HOT GAS VALVE
COMPRESSOR
ELECTRONIC TIMER
NOTE.
During the defrost cycle, the water
inlet solenoid valve is energized. The water
flows through the valve to the back side of the
evaporator platen and then down to fill up the
icemaker sump tank for the next freezing cycle.
OPERATIONAL CHECKS
A. The unit now starts its first freezing cycle
with the following components in operation:
COMPRESSOR
WATER PUMP
FAN MOTOR in air cooled version
B. Check to see through the ice discharge
opening that the spray system is correctly seated
and that the water jets uniformely reach the
interior of the inverted cup molds; also make sure
that the plastic curtain is hanging freely and there
is not excessive water spilling through it.
C. The ice making process takes place thereby,
with the water sprayed into the molds that gets
gradually refrigerated by the heat exchanged
with the refrigerant flowing into the evaporator
serpentine.
D. On units
B 20 - B 4 0 - B 45
when the
evaporator temperature reaches a preset value
the evaporator thermostat or cube size control
changes its contacts; the freezing cycle ends
and starts the defrost or harvest cycle.
E. On models
B75 - B 90
freezing cycle is
completed through an electronic timer
energized by the evaporator thermostat. It
starts when the cube size thermostat/control
bulb (pig tail) located on the evaporator
serpentine
reaches a temperature of approx.
-15
°
C (5
°
F).
On units
B 7 5 - B 90
the
additional Time (8') of the freezing cycle
starts when the cube size thermostat control
bulb (pig tail) located on the evaporator coil
reaches a temperature of approx. -15
°
C.
Freezing time will range between 20 and 22
minutes in a 21
°
C ambient temperature,
longer if above this temperature and shorter
if below.Then the unit goes directly into the
Defrost Cycle. 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
B 2 0 - B 40 and B 45
, 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
machine until the desired size is achieved.
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