Initial Start Up
Note: If the first batch of cubes are not all uniform
discs, some ice machine cleaner should be added
to the reservoir.
1. After ice has been harvested, but before new
cubes begin to form, switch the ICE/OFF/WASH
switch to WASH.
2. Add 4 oz. of ice machine cleaner to the
reservoir. Allow unit to operate that way for 10
minutes.
3. Switch ICE/OFF/WASH switch to OFF
4. Shut the water supply off.
5. Remove the splash guard, and drain the
reservoir by removing the drain elbow.
7. Replace all parts, turn on the water and
move ICE/OFF/WASH switch to ICE. The next
batch of ice should be uniform.
13. Check harvest. The machine will have to
harvest all of the cubes before it goes back into the
freeze cycle.
14. Check operation of the bin control circuit by
holding ice on the bin control tube in the bin.
If the ice maker does not stop within 1 minute,
while keeping ice on the thermostat, rotate the bin
thermostat shaft counter clockwise until the ice
maker does stop. Remove the ice from the
capillary tube; the ice maker should restart within 2
minutes. If it does not, rotate the adjusting shaft
clockwise until the machine starts.
15. Replace all the panels. The ice machine is now
ready for automatic operation.
Electrical Sequence:
Freeze Cycle:
During the first part of the freeze cycle, the ice
machine compressor, fan motor and water pump
are operating.
Assume the bin thermostat is open (low ice), relay
K1 will NOT have power thru its coil and K1
contacts 6-2 will be closed, connecting power to
the ice size thermostat and the liquid line valve coil.
The ice size thermostat contact 2-3 are closed,
connecting power to the fan motor and the pump
motor.
The Harvest Termination Thermostat is closed to
NC, but there is no power thru it.
The ice size thermostat heater is on, and the
compressor contactor coil is energized.
Harvest:
In the harvest cycle, the compressor is operating,
and the hot gas valve is energized. The fan and
and pump are off. The bin thermostat is still open.
The when the ice near the ice size thermostat
sensing tube grows large enough to force water
over the sensing tube, that tube looses heat, and
at 38
o
F. contacts 2-3 open and 2-1 close.
This removes power from the water pump and
remote fan and connects power to the relay coil.
When the relay coil has power, it connects power
to the hot gas valve coil.
The harvest termination switch is closed, and
power flows thru it to the relay coil. This keeps the
relay energized, even when the ice size thermostat
switches contact position as a result of ice falling
away from the sensing tube.
The unit stays in the harvest cycle until the
thermodisc on the suction line warms up to 55
o
F.,
At that time the defrost themodisc switches to NO
and the harvest cycle is terminated. If the bin
thermostat is still open, relay K1 will still not have
power and the unit will go back into the freeze
cycle. If relay K1 has power, it shuts off the ice
machine by cutting power to the liquid line valve,
after the unit pumps down, the low pressure
control shuts off the compressor.
Whenever there is ice on the bin thermostat, it
closes a circuit to the coil of relay K1 and stops the
ice making process at the end of a harvest cycle.
The crankcase heater is on at all times.
Siphon Tube Schematic
U-Tube Adjusted
Here = No Purge
Siphon Breaker Hole
U-Tube Here =
Maximum Purge
Water Level
At Harvest
Water Level With
Pump ON
Water Inlet
1/8 - 1/4
Bottom of
Reservoir
Elbow
Drain Outlet
SLE400R
January 1995
Page 14
