ICE Series

Refrigeration System

Refrigerant Cycle and

Components

Before diagnosing the refrigeration system, it is very important that the refrigerant charge be correct.

Whenever the refrigeration system has been opened, the filter-drier must be replaced and the proper refrigerant charge must be weighed in. See refrigerant charge data on page A5–A8.

Refrigerant Pressures

The suction pressure at the

beginning of the freeze cycle can vary +/- 10 psi

(.7 bar) depending on operating conditions. Reference Chart on page E10-E13. Pressures less than this may indicate an undercharge. The discharge pressure on water-cooled units should be 250 psi (17.01 bar) for R404a units and 150 psi (10.21 bar) for R134a units. The discharge pressure on air cooled units will vary with ambient conditions but will typically run higher than water cooled units. Remote condensers located in ambient temperatures below 70°F (21°C) will typically run a lower discharge pressure. See Mixing Valve later in this section.

Refrigerant in a gas state is pumped throughout the refrigeration system by a hermetic compressor to the condenser. Heat is removed from the refrigerant either by forced air movement through an air-cooled condenser or transferring heat from the refrigerant to water through a water-cooled condenser. The refrigerant changes to a liquid when cooled.

The refrigerant in a liquid state passes through a filter drier. The filter drier traps small amounts of moisture and foreign particles from the system. The filter drier must be replaced whenever the refrigeration system is opened or if the refrigerant charge has been completely lost.

Compressor

The compressor runs during the entire cycle. If the valves in the compressor are damaged, the compressor will be unable to pump refrigerant efficiently. Damaged valves are usually the result of another problem in the refrigeration system such as liquid refrigerant returning to the compressor, oil slugging or high head pressure. When a compressor is replaced it is important that the refrigerant charge be weighed in and the system checked for proper operation to prevent a repeat failure.

An inefficient compressor will usually have a higher than normal suction

pressure at the end of the cycle. The freeze cycle will be longer than normal and/or the harvest cycle may be excessively long. Check the compressor amperage draw 5 minutes into the freeze cycle. If the compressor amp draw (Reference data plate on ice machine back panel) is less than 70% of rated full load amps, the compressor may be inefficient. These symptoms may also be caused by other problems, therefore it is important to use the troubleshooting trees when diagnosing a problem. See Electrical System for more information on the compressor and compressor start components.

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Ice-O-Matic ICE0250 Series installation manual Refrigerant Cycle Components, Refrigerant Pressures, Compressor
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ICE0250 Series specifications

The Ice-O-Matic ICE0250 Series is a high-performance, modular ice maker that has been designed specifically to meet the needs of commercial establishments. Known for its durability and efficiency, this series is ideal for restaurants, bars, and hotels requiring a consistent supply of quality ice. The unit produces up to 250 pounds of clear, cube ice per day, making it an excellent choice for businesses with moderate ice demands.

One of the standout features of the ICE0250 Series is its energy efficiency. The ice maker is designed with a focus on reducing energy consumption, enabling business owners to save on operational costs while still providing ample ice for their customers. The unit is ENERGY STAR certified, reflecting its compliance with energy efficiency guidelines set by the U.S. Environmental Protection Agency (EPA).

The ICE0250 model also incorporates a unique air filtration system that helps ensure an uninterrupted ice production cycle. This technology minimizes the impact of airborne dust and contaminants, which can significantly affect the quality and hygiene of the ice produced. The unit's heavy-duty construction is designed to withstand the rigors of commercial use, providing long-lasting performance.

Another key characteristic of the ICE0250 Series is its compact design, which allows it to fit seamlessly into various commercial kitchen settings. Despite its smaller footprint, the unit does not compromise on ice production capabilities. Additionally, its user-friendly controls simplify operation, making it easy for staff to manage the ice-making process effectively.

Maintenance is also straightforward with the Ice-O-Matic ICE0250 Series. It features a self-cleaning function that automatically flushes the system, helping to maintain optimal performance while reducing the frequency and complexity of manual cleanings. This feature can save valuable time for busy kitchen staff.

In conclusion, the Ice-O-Matic ICE0250 Series stands out as an efficient, durable, and reliable ice maker for commercial applications. With its energy-saving technologies, robust construction, and ease of maintenance, this ice maker is a top choice for businesses looking to deliver ice in a consistent and hygienic manner. Whether for serving refreshing beverages or creating exquisite culinary presentations, the ICE0250 ensures that ice production remains effortless and efficient.
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