CU50

Service Manual

Water System

The controller uses a Water Sensor to check for the presence of water in the reservoir and to measure the conductivity of the water.

The water sensor consists of two stainless steel probes located in a holder next to the water pump.

The probes sense the conductivity of the water. The higher the mineral content of the water, the better it can conduct electricity. The control system is capable of sensing water as clean as 10 microSiemens/cm.

If the controller cannot sense water and the bin thermostat is closed the controller will power the inlet water solenoid valve to fill the reservoir. The water fill is timed. There is a maximum amount of time allowed from the time the controller turned on the inlet water valve until the water sensor signals to the controller. That time is 2 1/2 minutes. If water is not sensed within 2 1/2 minutes, the controller will not proceed with an ice making cycle. Instead it will blink the Water light and try filling the reservoir in 20 minutes.

Reservoir water dilution

The process of making ice from circulating water causes the pure water to freeze first, because it freezes at the warmest temperature. The remaining water will develop an increasing concentration of minerals. If that mineral concentration were allowed to continue, eventually the ice machine would become coated with mineral scale.

To combat the mineral build up, the reservoir water is diluted with fresh water every cycle. The controller adds enough water to fill the reservoir and extra water to overfill it. The extra water drains out through the standpipe in the reservoir.

The controller keeps the inlet water solenoid valve open until the evaporator temperature set point is reached, plus some extra time. The extra time is either pre-set or automatically determined by the controller.

Evaporator

Pump

Reservoir

Drain

Freeze Cycle Water Schematic

Standpipe

Inlet Water Solenoid Valve Harvest Cycle Water Schematic

March 2010

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Scotsman Ice CU50 service manual Water System
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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.
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