Scotsman Ice FME504, NME454, NME654, FME804 manual Operation Refrigeration, Refrigeration Schematic

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NME454, 654 & FME504, 804

OPERATION: Refrigeration

Beginning at the compressor, the refrigerant is compressed into a high temperature gas. The discharge line directs this gas to the condenser. At the condenser (air or water cooled) the gas is cooled by either air or water and it then condenses into a liquid. This high pressure liquid then goes through the liquid line to the expansion valve.

The thermostatic expansion valve meters liquid refrigerant into the evaporator, the volume of liquid refrigerant depending upon the temperature of the evaporator.

At the evaporator, the refrigerant enters an area of relatively low pressure, where it can easily “boil off” or evaporate. As it evaporates, it absorbs heat from the evaporator and whatever is in contact with it (such as the water inside it). After the evaporator, the refrigerant, now a low pressure vapor, goes through the suction line back to compressor, where the cycle is repeated.

Refrigeration Schematic

CONDENSER

LIQUID

 

SUCTION LINE

LINE

DISCHARGE

 

 

EVAPORATOR

 

LINE

 

 

FAN

 

 

MOTOR

 

 

THERMOSTATIC

EXPANSION

VALVE

GEAR

COMPRESSORMOTOR

January 2007

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Contents Introduction NME454, 654 & FME504Fuse Charge Ampacity Size 404A For the InstallerInstallation Limitations NME654 Dispenser ApplicationsSample BIN and Machine Combinations Water Limitations LocationAirflow Notice For the Installer LocationUse only ¾ rigid tubing For the PlumberFor the Electrician Final Check List Initial Start UP There are no Adjustments to MAKE, so replace the panelsComponent Description Low Pressure Cut Out SwitchNME454, 654 & FME504 On/Off mode Switch Manual control for Control BOX ComponentsAutoSentry Control Board Control Board Protection Devices Electrical SequenceStart Up Shut DownWater Level The correct water level should be Operation WaterOperation Refrigeration Refrigeration SchematicOperation Performance Cleaning & Sanitizing ICE Making System In place cleaningSanitizing Sensor Maintenance AIR Cooled Maintenance Clean the air cooled condenserHazardous Moving Parts Bearing Maintenance OffAt least two times per year Auger Maintenance Symptom Possible Cause Probable Correction Service DiagnosisSymptom Possible Cause Probable Correction Control System Diagnostics BIN Controls Ice Level Sensors Removal and Replacement Bin ControlsTo Remove the Breaker Bearing Assembly Removal and Replacement Bearing And BreakerStuck, Removal and Replacement AugerTo Remove the Auger Auger isRemoval and Replacement Water Seal To Remove the Water SealTo Replace the Water Seal Removal and Replacement Evaporator Heat sink the TXV body when unsweating orResweating the adjacent tubing Removal and Replacement Gear Reducer and Motor Refrigeration System Service Access Valves To useInstructions for Liquid Charging R-404A If the machine is off, not making ice What to do Before Calling for Service
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FME504, FME804, NME654, NME454 specifications

Scotsman Ice Systems is known for its high-quality ice machines, and models such as the NME454, NME654, FME804, and FME504 are no exceptions. Designed with both performance and efficiency in mind, these machines cater to various business needs, from restaurants to convenience stores.

The NME454 and NME654 units are renowned for their compact design, making them ideal for establishments with limited space. Despite their smaller size, these machines do not compromise on ice production capacity. The NME454 can produce up to 430 pounds of ice per day, while the NME654 boasts an impressive output of up to 600 pounds. Both models utilize Scotsman's signature innovative technology to ensure consistent ice quality, primarily in the form of nugget ice, which is favored for its ability to cool beverages quickly.

In contrast, the FME804 and FME504 are larger-capacity machines that cater to high-volume requirements. The FME804 can produce around 800 pounds of ice daily, making it suitable for busy restaurants or bars. The FME504, while slightly smaller, still offers impressive production capabilities of up to 500 pounds per day. These machines incorporate advanced features such as the AquaArmor protective layer, which inhibits bacterial growth, ensuring that the ice produced is not only abundant but also hygienic.

All four models utilize an innovative air-cooled design that enhances energy efficiency and reduces operational costs. The easy-to-use control panel allows for straightforward operation, and maintenance is streamlined thanks to easily accessible components. Additionally, the quiet operation of the machines ensures that they can be used in front-of-house areas without distracting customers.

In terms of construction, Scotsman ice machines are built to last with corrosion-resistant materials, ensuring longevity in demanding environments. With simple installation processes and compatibility with various environments, including indoor and outdoor settings, these units provide adaptability for any business scenario.

Overall, Scotsman’s NME454, NME654, FME804, and FME504 ice machines combine robust performance with innovative technology, catering efficiently to diverse ice production needs while maintaining high standards of hygiene and reliability.
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