Operating Instruction; Start Up; Operational Checks - Scotsman B 21 WS Manuel De Service

Page 4

START UP

After having correctly installed the ice maker and
completed the plumbing and electrical
connections, perform the following "Start-up" pro-
cedure.
18-21-31-40
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).
50-65-90
A. Remove the unit front panel and locate the
timer shaft on the control box.
B. Check that master and the compressor
switch located on the lower left hand side of the
control box are both in the OFF position.
C. Rotate the timer shaft protruding through
the front of the control box clockwise, until and
audible click is heard indicating that the actuator
arm of the microswitch has dropped into the cam
slot (Fig. A).
OPERATING INSTRUCTIONS
D.
The compressor switch must stay in the OFF
position. This will close the electrical circuit to the
water inlet valve and to the hot gas valve.
E.
switch. Unit will start up in defrost cycle mode.
During this cycle the components energized are:
WATER INLET SOLENOID VALVE
HOT GAS SOLENOID VALVE
TIMER MOTOR
F.
three minutes) move the compressor switch to
ON position.

OPERATIONAL CHECKS

A.
with the following components in operation:
COMPRESSOR
WATER PUMP
FAN MOTOR in air cooled version
B.
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.
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.
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.
rotate at the end of the harvest cycle. It starts
later when the cube size thermostat control bulb
(pig tail) located on the evaporator coil reaches a
temperature of approx. -15°C (5°F).
Set the master switch to the ON position.
Switch ON the power line disconnect
After completion of harvest cycle (about
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.
The unit now starts its first freezing cycle
Check to see through the ice discharge
The ice making process takes place
On units 18-21-31-40 when the evaporator
On units 50-65-90 the time clock does not