Scotsman Ice CU50 System Information, Electrical Sequence, Electrical Components, Bin control

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CU50

Service Manual

System Information

Overall:

Electrical Sequence:

Refrigerant: 8 oz R-134a

A closed bin thermostat signals to the controller a

Compressor: Hermetic, 1300 BTUH,

need for ice. The controller checks for water, if

Condenser: Forced draft

water is needed , the controller opens the inlet

water solenoid valve to fill the reservoir. The hot

Fan blade: 5 blade, 7 inch

gas valve is open to equalize the system. When the

Evaporator: Inverted, 24 cube cells. Copper

reservoir is full, the compressor, fan motor, water

 

cups attached to continuous serpentine

 

pump are switched on. After 5 seconds the hot gas

Metering device: Cap tube

valve shuts and ice making begins.

 

 

Defrost method: Hot gas bypass with water

 

assist

Water is sprayed up into the inverted cup mold. As

Spray method: 6 water jets

the water is cooled and ice begins to form in the

Water charge: 40 ounces

cups, the temperature of the evaporator will fall.

Water valve: 115 volt solenoid, .19 GPM

Water fill time: Varies with harvest time &

The freeze cycle continues until the temperature of

the thermistor attached to the evaporator outlet

 

purge setting

 

tube falls to about zero degrees F. At that point the

Spray pump: Pedestal type.

controller starts a freeze cycle timer, whose default

Drain pump: Magnetic drive, controlled by

time is 10 minutes. At the end of the freeze cycle's

 

pressure switch

 

timed portion the controller switches to the harvest

 

 

Purge method: Overflow standpipe

cycle.

Control method: Electronic

Cycle control: Thermistor + timers

The harvest cycle begins with the controller

Freeze cycle timer: 10 minutes, + - 4

stopping the water pump and fan motor. At the

same time it opens the hot gas valve and the inlet

Harvest cycle timer: 20 seconds, + - 40

water solenoid valve. The ice is released by the

Cube size adjustment: Freeze timer change.

combination of discharge refrigerant gas entering

Harvest cycle adjustment: Harvest timer

the evaporator serpentine and warming up the

 

change

 

copper, plus the inlet water that flows to the

 

 

Bin control: Thermostat. Opens on

evaporator, floods across the plastic platen to

 

temperature fall, Cut Out: 35 degrees F. Cut

warm it up and be pre-chilled for the next cycle. Ice

 

In 45 degrees F. Range is adjustable.

cubes drop individually and harvest continues until

 

 

the thermistor attached to the suction line warms

Electrical Components:

up to about 50 degrees F. At that point a harvest

 

 

timer starts, whose default time is 20 seconds. At

Compressor

the end of that time the harvest cycle ends and the

Fan motor

freeze cycle restarts.

Spray pump motor

Drain pump motor

Bin control.

 

Drain pump switch

The machine's on and off modes are regulated by a

Inlet water solenoid valve

bin thermostat. The cap tube for the bin thermostat

 

Hot gas valve

is in the tube that holds the scoop. The machine

Transformer

will only begin ice making when the thermostat's

Controller

contacts close. If the contacts re-open before the

Water sensor

temperature of the evaporator drops below a preset

point, the machine will stop. If the temperature is

Thermistor

below that point when the contact s open, the

Bin thermostat

machine will continue through a complete cycle

 

 

and stop at the end of the harvest cycle.

March 2010

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Contents Introduction Table of ContentsSpecifications Cabinet Layout PowercordAir flow Filters and Treatment Installation OverviewWater Quality Door swing change Installation Notes Drain Pump Model drain installation Installation Water & DrainGravity Drain Initial Start Up Installation check listElectrical Cube Size Change Table Cube Size AdjustmentHarvest Time Table Harvest Time AdjustmentReset time to clean indicator light Control SettingsAutomatic water purge enable / disable Use Condenser cleaning How to clean the condenser and winterizeHow to remove scale from the ice making system Electrical Sequence System InformationElectrical Components Bin controlWater System Components Maximum Harvest Time minutes ControllerPerformance Information Discharge Pressure Refrigeration SystemTime Deg. F · Ohms Deg. F. · Ohms Thermistor ValuesProblem Likely Cause Probable Solution Service DiagnosisMakes excessive noise Removal and Repair Controller Evaporator ThermistorControl Panel TransformerRemoval and Repair Cabinet Removal CU50 Refrigeration Service

CU50 specifications

The Scotsman Ice CU50 is a compact and efficient undercounter ice maker designed for restaurants, bars, and small commercial spaces that require a reliable supply of ice. Known for its innovative design and user-friendly features, the CU50 can produce up to 65 pounds of clear, gourmet ice cubes daily, making it a perfect choice for establishments with moderate ice demands.

One of the main features of the Scotsman CU50 is its space-saving design. Measuring just 14 inches wide, it fits effortlessly under most countertops, maximizing usable space in tight environments. Despite its compact size, the unit boasts a robust performance, thanks to its advanced ice-making technology. The CU50 utilizes a water-cooled system that enhances the efficiency of ice production while ensuring optimal performance even in warmer conditions.

The CU50 generates ice in the form of crystal-clear cubes, which not only look appealing in drinks but also melt slowly, reducing dilution and maintaining beverage quality. The ice produced is perfect for a variety of uses, from cocktails to soft drinks, providing an upscale experience for patrons.

One of the standout characteristics of the Scotsman CU50 is its user-friendly interface. The unit features a simple control panel that allows users to easily adjust settings and monitor ice production. Additionally, it comes equipped with a self-cleaning feature, which simplifies maintenance and ensures that the machine operates efficiently over time.

The Scotsman CU50 is also designed with energy efficiency in mind. It is ENERGY STAR certified, which means it meets strict energy efficiency guidelines set by the U.S. Environmental Protection Agency. This not only helps reduce operating costs but also minimizes environmental impact.

Another noteworthy aspect of the CU50 is its durable construction. Built with stainless steel and high-quality components, it is designed to withstand the rigors of daily use in a commercial setting. Its rugged design ensures a long lifespan, making it a smart investment for business owners.

In summary, the Scotsman Ice CU50 is an ideal solution for establishments requiring reliable ice production in a compact footprint. With its advanced technology, easy-to-use features, and durable construction, it delivers high-quality ice while ensuring efficiency and ease of maintenance. Whether you are running a busy bar or a cozy café, the CU50 is equipped to meet your ice needs with style and reliability.