Scotsman CME506 Manual descargar pdf (Pagina 15)

How The Electronic Cuber Works

This section is intended for the technician. It is not

necessary for the normal operation and

maintenance of the machine.

The AutoIQ Controller operates the ice machine by

monitoring several input measures and switching

various loads on and off.

Water System:

Water flows into the ice machine during the

harvest cycle thru the inlet water valve. The water

valve will NOT be open the complete length of the

harvest cycle. The water pump forces water to the

top of the evaporators, both in the Freeze and

Harvest cycles. Un-frozen water falls thru the cube

deflector and back into the reservoir. As water is

turned into ice, the water level in the reservoir falls,

and at the point where the cubes are fully formed,

the Water Level Sensor indicates to the Controller

that it is time to begin the Harvest cycle.

During the Harvest cycle, water again enters the

water reservoir, and overfills it to rinse the

reservoir of accumulated minerals. It does

NOT overflow for a fixed

amount of

time, but for a time determined by

the Controller.

The water pump will be off

for a short period of

time at the beginning

of harvest.

Refrigeration System:

The refrigeration system is similar to that of most

commercial cube ice machines. Heat is removed

from the water and discharged out the condenser

during the freeze cycle. As liquid refrigerant

passes thru the Thermostatic Expansion Valve(s),

it enters the bottom of the evaporators, and will

form on the bottom first. Model CME506E has

check valves to help direct the flow of refrigerant to

the correct distributor.

When cubes need to be released (Harvest) the Hot

Gas Bypass Valve is opened and hot discharge

gas flows directly from the compressor to the

evaporator inlets. This warms up the evaporators

and the surface of the ice frozen to the evaporator

surface melts. Ice then falls into the bin.

CME256, 506, 656, 806: AutoIQ™ Cubers

January 2002

Page 15

Hot Gas Valve

Thermostatic

Expansion Valve

Water

Distributors

Evaporators

Cube

Deflector

Inlet Water Valve

Water and Refrigeration

Schematic - Note: CME506 E Has

Two Expansion Valves

Water Pump

Reservoir

Drain

Water Cooled

Condenser

Compressor

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 35 36

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